CN113617295B - Reaction furnace and material production process - Google Patents

Abstract

The application relates to the field of equipment manufacturing, in particular to a reaction furnace and a material production process. The reaction furnace comprises: the inner pipe is provided with a first material cavity and is provided with a discharge hole; the first driving piece is connected with the inner pipe; the outer pipe is sleeved outside the inner pipe, and a second material cavity is formed between the inner pipe and the outer pipe; and the second driving piece is connected with the outer pipe. The inner pipe and the outer pipe are driven to rotate, so that the material in the first material cavity can enter the second material cavity through the discharge hole, and is mixed and reacted with the material in the second material cavity; the atmosphere of the reaction cavity can be controlled by ventilating the air inlet pipe; has the functions of improving the mixing uniformity and controlling the reaction rate and the reaction atmosphere; can be applied to the process which has the regulation and control requirement on the mixing process or the reaction process; in addition, a large amount of materials can be added into the first material cavity and the second material cavity, and the reaction furnace can be applied to large-scale production of materials.

Description

A kind of reaction furnace and material production process

technical field

The present application relates to the field of equipment manufacturing, and in particular, to a reaction furnace and a material production process.

Background technique

The high-temperature solid-phase reaction method is to mix the reactants evenly to generate a precursor or amorphous product, and then calcinate at a high temperature (200-1000 ° C) to complete the reaction and crystallize the product. Commonly used in the preparation of nanomaterials. For example, silicon nanomaterials are widely used in lithium-ion batteries, solar cells, cermet sintering, composite materials, refractory materials and other fields due to their excellent physical and chemical properties. conduct. For example, soil conditioners (materials added to soil to improve soil physical, chemical or biological properties) can be used for heavy metal passivation, pH adjustment, water retention and air permeability improvement, etc.; Divide, or slightly heat to make the components bind more firmly. For the above solid-phase reactions, the atoms and ions participating in the reaction components are limited by crystal cohesion and cannot move freely as in liquid or gas-phase reactions. It is extremely important to proceed. The progress of solid-phase reactions at high temperatures is often difficult to control and thus adversely affects the reaction products.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a reaction furnace and a material production process, which aims to improve the problem that the reaction process of the high-temperature solid-phase reaction is not easy to control.

A first aspect of the present application provides a reaction furnace, the reaction furnace comprising:

an inner tube, the inner tube has a first material cavity, and the inner tube is provided with a discharge hole that penetrates the inner tube and communicates with the first material cavity;

a first driving member, the first driving member is connected with the inner tube and used to drive the inner tube to rotate;

an outer tube, the outer tube is sleeved outside the inner tube and is rotatably connected with the inner tube, and a second material cavity is formed between the inner tube and the outer tube; and

A second driving member, the second driving member is connected with the outer tube and used to drive the outer tube to rotate.

The inner tube is driven to rotate by the first driving member, and the outer tube is driven by the second driving member to rotate, so that the material in the first material cavity can enter the second material cavity through the discharge hole, so that the material can react or mix in the second material cavity; The reaction furnace provided by the application can adjust the particle size and quality of the materials in the first material cavity entering the second material cavity, and has the effect of controlling the mixing or reaction rate; it can be applied to processes that need to regulate the mixing process or the reaction process. ; In addition, a large amount of materials can be added to the first and second material chambers, and the reaction furnace can be applied to large-scale production of materials.

In some embodiments of the first aspect of the present application, a stirring blade is provided on a side of the inner tube close to the outer tube.

In some embodiments of the first aspect of the present application, the stirring blade includes an extension part and a stirring part, the extension part is connected with the inner pipe, the extension part extends in a direction perpendicular to the axial direction of the inner pipe, so The stirring part is connected to the free end of the extending part, and the stirring part extends in a direction parallel to the axial direction of the inner tube.

In some embodiments of the first aspect of the present application, the reaction furnace further includes a heating component, the heating component is sleeved outside the outer tube, and the heating component is rotatably connected to the outer tube.

A second aspect of the application provides a material production process based on the above-mentioned reaction furnace, comprising:

placing the first raw material in the first material cavity, and placing the second raw material in the second material cavity;

the heating assembly heats the first raw material and the second raw material;

Rotate the inner tube and the outer tube, and pass protective gas into the first material cavity or the second material cavity;

The first raw material enters the second material cavity through the material hole to react with the second raw material.

In some embodiments of the second aspect of the present application, the first feedstock comprises a clay mineral and a salt, the second feedstock comprises at least one of magnesium, aluminium, sodium, potassium, calcium and zinc, and the salt comprises At least one of NaCl, LiCl, KCl, CaCl ₂ , ZnCl ₂ , and MgCl ₂ .

In some embodiments of the second aspect of the present application, the clay mineral is montmorillonite, the salt is NaCl; the second raw material is magnesium; the heating component heats the first raw material and the second raw material Raw material to 600-700°C.

The magnesium metal in the first material cavity can enter the second material cavity relatively slowly and evenly to react with montmorillonite and NaCl; the whole reaction process is better controllable, and can be adjusted according to the diameter of the discharge hole and the rotation speed of the inner tube, the outer Tube speed controls how fast the reaction proceeds. The slow entry of metal magnesium into the second material cavity can avoid affecting the morphology of the final product due to the high local reaction heat.

In some embodiments of the second aspect of the present application, the flow rate of the protective gas introduced into the first material chamber or the second material chamber is 1-10 L/min.

In some embodiments of the second aspect of the present application, after the first raw material enters the second material cavity through the material hole and the reaction with the second raw material is completed, the method further includes:

After washing the reaction product with acid, the solid phase was leached with HF and then dried.

In some embodiments of the second aspect of the present application, the first raw material is a clay mineral; the second raw material is a soil additive;

Optionally, the first raw material is palygorskite; the second raw material is potassium dihydrogen phosphate;

Optionally, the rotational speed of the inner tube is 60-140 r/min, and the rotational speed of the outer tube is 20-50 r/min.

During the reaction process, potassium dihydrogen phosphate in the first material cavity can relatively slowly and uniformly enter the second material cavity to react with palygorskite; to achieve the effect of slow release and slow reaction, the polyphosphate in the obtained soil conditioner It can be distributed evenly on the palygorskite surface.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 shows a schematic diagram of the internal structure of the reaction furnace provided in the embodiment of the present application;

FIG. 2 shows a schematic structural diagram of a housing provided by an embodiment of the present application;

FIG. 3 shows a schematic structural diagram of a heating assembly provided by an embodiment of the present application.

Icon: 100-reaction furnace; 110-inner pipe; 111-first material chamber; 112-discharge hole; 113-stirring blade; 120-outer pipe; 121-second material chamber; 122-shell; 123-rotating shaft Cover; 130-first driving part; 140-second driving part; 150-heating assembly; 151-heating element; 152-thermal insulation layer; 160-support frame.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or is based on the use of the product of the application The orientation or positional relationship that is usually placed at times, or the orientation or positional relationship that is commonly understood by those skilled in the art, is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific Orientation, construction and operation in a particular orientation, and therefore should not be construed as a limitation of the present application.

Furthermore, the terms "first", "second", etc. are only used to differentiate the description and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

Example 1

FIG. 1 shows a schematic diagram of the internal structure of a reaction furnace 100 provided by an embodiment of the present application. Please refer to FIG. 1 . This embodiment provides a reaction furnace 100. The reaction furnace 100 provided by the present application is suitable for high-temperature solid-phase reaction. It needs to be explained However, the application does not limit the application of the reaction furnace 100, for example, it can be used for liquid-solid reaction, or the reaction furnace 100 can also be used for material mixing and material stirring.

The reaction furnace 100 includes an inner tube 110 , an outer tube 120 , a first driving member 130 , a second driving member 140 and a heating assembly 150 . The first driving member 130 is connected to the inner tube 110 for driving the inner tube 110 to rotate, and the second driving member 140 is connected to the outer tube 120 for driving the outer tube 120 to rotate. The outer tube 120 is sleeved outside the inner tube 110 , and a second material cavity 121 is formed between the outer tube 120 and the inner tube 110 . The heating assembly 150 is used for heating the inner tube 110 and the outer tube 120 .

Inside the inner tube 110 is a first material cavity 111 , the inner tube 110 is provided with an outlet and a cover for opening and closing the opening, and the first material cavity 111 can be filled with materials through the outlet.

In this embodiment, the inner tube 110 is cylindrical, the outlet of the inner tube 110 is disposed at one end of the inner tube 110 , the first driving member 130 is connected to one end of the inner tube 110 , and the first driving member 130 can drive the inner tube 110 to rotate .

A plurality of discharge holes 112 are distributed on the inner pipe 110 at intervals. The discharge holes 112 penetrate through the inner pipe 110 and communicate with the first material cavity 111 , so that the material in the first material cavity 111 can be discharged through the discharge holes 112 .

In this embodiment, the diameter of the discharge hole 112 is 1-5 mm, for example, it may be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, and so on. The discharge holes 112 are distributed along the length direction of the inner pipe 110 and also distributed along the circumferential direction of the inner pipe 110 .

It should be noted that, in other embodiments of the present application, the inner tube 110 may be in other shapes, such as a prismatic shape or a curved tube shape; accordingly, the present application does not limit the shape of the first material cavity 111 .

In addition, the diameter of the discharge hole 112 can be set according to the particle size in the first material cavity 111 or the speed of the reaction in the reaction process, and is not limited to the above-mentioned 1-5 mm, for example, it can be 0.5 mm, 6 mm, 7 mm, 10 mm, etc. etc.; the number of discharge holes 112 and the distance between two adjacent discharge holes 112 can also be set according to specific requirements, which are not limited in this application.

In some embodiments of the present application, the inner pipe 110 is further provided with an air inlet for communicating with the air inlet assembly; gas, such as reacting gas or protective gas, can be introduced into the inner pipe 110 through the air inlet. It should be noted that, for the embodiment that does not need to pass gas, the inner pipe 110 may not be provided with an air inlet hole.

In this embodiment, the outer surface of the inner tube 110 is further provided with a stirring blade 113 ; the stirring blade 113 is located on the outer surface of the inner tube 110 away from the first material cavity 111 .

In this embodiment, the stirring blade 113 includes an extension part and a stirring part, the extension part is connected to the inner pipe 110 , the extension part extends in a direction perpendicular to the axial direction of the inner pipe 110 , and the stirring part is in a direction parallel to the axial direction of the inner pipe 110 extend. The stirring part is connected to the free end of the extension part. The extension part and the stirring part are perpendicular to each other. For example, in some embodiments, the extension part is connected to the middle of the stirring part, and the stirring blade 113 is approximately T-shaped. It is understood that, in some embodiments, the extending part may be connected to the end of the stirring part, and the stirring blade 113 is approximately T-shaped. Inverted L shape.

The stirring blade 113 is located in the second material cavity 121. During the rotation of the inner pipe 110, the stirring blade 113 rotates synchronously with the inner pipe 110, thereby stirring the material in the second material cavity 121; the stirring part is parallel to the axis direction of the inner pipe 110. The extension direction of the stirring part is perpendicular to the centrifugal force of the material, and the stirring part can intercept the material moving away from the inner tube 110 due to the centrifugal force, so that the system in the second material cavity 121 is more uniform.

It should be noted that, in other embodiments of the present application, the stirring blade 113 may be in other shapes, for example, may be a spiral blade or a curved rod shape or the like. Alternatively, in some usage scenarios that do not require high material uniformity, the reaction furnace 100 may not be provided with the stirring blade 113 .

The outer tube 120 is sleeved outside the inner tube 110 , the inner tube 110 extends into the outer tube 120 from one end of the outer tube 120 , and a second material cavity 121 is formed between the inner tube 110 and the outer tube 120 . The inner tube 110 and the outer tube 120 are rotatably connected. In this embodiment, the inner tube 110 and the outer tube 120 are connected by a bearing, so that the inner tube 110 can rotate relative to the outer tube 120 .

Continuing from the above, in some embodiments of the present application, the outer pipe 120 is further provided with an air intake hole communicating with the air intake assembly; gas, for example, a reaction gas can be introduced into the second material chamber 121 through the air intake hole or protective gas. It should be noted that, for the embodiment that does not need to pass gas, the outer pipe 120 may not be provided with an air inlet hole.

In this embodiment, the outer tube 120 is a circular tube, the outer tube 120 and the inner tube 110 are coaxially arranged, the material of the outer tube 120 is a 310S stainless steel tube, and both ends of the outer tube 120 are fixed and sealed with flanges.

It should be noted that, in other embodiments of the present application, the outer tube 120 may be in other shapes, such as a prismatic shape or an elbow shape, etc.; the material of the outer tube 120 may also be selected according to requirements.

In this embodiment, the first driving member 130 and the second driving member 140 are both motors, the first driving member 130 is drivingly connected to the inner tube 110 through a gear pair, and the second driving member 140 is drivingly connected to the outer tube 120 through a gear pair .

It should be noted that, in other embodiments of the present application, the first driving member 130 and the second driving member 140 may be respectively connected to the inner tube 110 and the outer tube 120 through other transmission connection methods, so that the first driving member 130 and the The two driving members 140 can respectively drive the inner tube 110 and the outer tube 120 to rotate.

Referring to FIG. 1 again, in this embodiment, the outer tube 120 is further sleeved with a casing 122 , and the casing 122 and the outer tube 120 are connected by a rotating shaft sleeve 123 , so that the casing 122 and the outer tube 120 can rotate relative to each other.

It should be noted that, in other embodiments of the present application, the outer shell 122 may not be provided in the reaction furnace 100 .

FIG. 2 shows a schematic structural diagram of the housing 122 provided by the embodiment of the present application. Please refer to FIG. 2 . In this embodiment, the housing 122 is formed by rotating and connecting two semi-circular arc plates, and the outer tube 120 and the housing 122 can be connected For detachable connection, the shell 122 is provided with a buckle, and the semi-circular arc-shaped plate is detachably connected through the buckle, so as to open the shell 122 and install the outer tube 120 into the shell 122 .

FIG. 3 shows a schematic structural diagram of a heating assembly 150 provided by an embodiment of the present application. Please refer to FIGS. 1 and 3 . The heating assembly 150 is mainly used to heat the outer tube 120 and the inner tube 110 , thereby heating the first material chamber 111 and the material in the second material chamber 121 is heated.

In this embodiment, the heating assembly 150 includes a heating element 151 and an insulating layer 152 , the heating element 151 is connected to the casing 122 , and the insulating layer 152 is arranged around the outer periphery of the casing 122 . For example, the heating element 151 may be a heating wire or a silicon carbide rod.

It is heated by the heating element 151 , and then the heat is transferred to the second material chamber 121 through the outer shell 122 and the outer tube 120 , and then transferred to the first material chamber 111 through the inner tube 110 . The thermal insulation layer 152 can avoid a large amount of heat loss and increase the heat utilization rate.

It should be noted that, in other embodiments of the present application, the heating assembly 150 may be other mechanisms capable of supplying heat, for example, the heating assembly 150 may be a heat exchange sleeve through which the outer tube 120 and the inner tube 110 are heated And so on, the heating component 150 may be set according to the target heating temperature of the materials in the first material chamber 111 and the second material chamber 121 .

In this embodiment, the reaction furnace 100 is provided with a support frame 160 for supporting the heating assembly 150 , and the support frame 160 is connected with the heating assembly 150 . It should be noted that, in some embodiments, the support frame 160 is not necessary, and the reaction furnace 100 may not be provided with the support frame 160 .

In some embodiments of the present application, if the first material chamber 111 and the second material chamber 121 do not need to be heated, the reaction furnace 100 may not be provided with the heating element 150 , in other words, the heating element 150 is not necessary in some embodiments.

In this embodiment, the reaction furnace 100 may further include a controller, which is connected to the heating element 151 of the heating assembly 150 to control the temperature of the materials in the first material chamber 111 and the second material chamber 121 .

Further, the controller can also be connected with the first driving member 130 and the second driving member 140 , and the controller controls the rotational speed of the inner tube 110 and the outer tube 120 by controlling the output power of the first driving member 130 and the second driving member 140 . .

The reaction furnace 100 provided in the embodiment of the present application has at least the following advantages:

The inner tube 110 is driven to rotate by the first driving member 130, and the outer tube 120 is driven by the second driving member 140 to rotate, so that the material in the first material cavity 111 can enter the second material cavity 121 through the discharge hole 112, so that the material in the second material cavity 121 Reaction or mixing in the material cavity 121; the reaction furnace 100 provided by the present application can adjust the particle size and quality of the material in the first material cavity 111 entering the second material cavity 121, and has the effect of controlling the mixing or reaction rate; it can be applied to The mixing process or the reaction process needs to be controlled; in addition, a large amount of materials can be added to the first and second material chambers, and the reaction furnace can be applied to the large-scale production of materials.

The following describes an example of the use of the reaction furnace 100 provided in the embodiments of the present application.

Please refer to Embodiment 1. The process for preparing materials in the reaction furnace 100 shown in Embodiment 1 may include the following steps:

The first raw material is placed in the first material chamber 111, and the second raw material is placed in the second material chamber 121; the heating component 150 heats the first and second raw materials; the inner tube 110 and the outer tube 120 are rotated to move toward the first material chamber Or the second material cavity is passed into the protective gas; the first material enters the second material cavity 121 through the material hole 112 to react with the second material.

It should be noted that, in this application, the steps of "putting the first raw material in the first material chamber 111" and the step of "putting the second raw material in the second material chamber 121" have no order, and can be performed simultaneously or separately according to requirements. conduct.

In the preparation process, the protective gas can be introduced into the first material cavity, and the protective gas can also be introduced into the second material cavity.

Two examples are given below for the preparation of materials in the reactor 100 .

Example 2

Embodiment 2 provides a process for preparing materials in the reaction furnace 100 shown in Embodiment 1, which mainly includes the following steps:

Step S1: placing clay minerals and salts in the second material chamber 121; wherein the salts can be at least one of NaCl, LiCl, KCl, CaCl ₂ , ZnCl ₂ , and MgCl ₂ ; for example, the salts can be NaCl; clay minerals For montmorillonite. It should be noted that, in other embodiments of the present application, the clay minerals are not limited to montmorillonite, for example, kaolinite, illite and the like.

As an example, the mass ratio of montmorillonite and NaCl is 1:(0.1-5), for example, it can be 1:0.1, 1:0.5, 1:2, 1:2.5, 1:3, 1:4, 1: 5 and so on.

Step S2: placing the second raw material in the first material chamber 111; the second raw material includes at least one of magnesium, aluminum, sodium, potassium, calcium and zinc, for example, the second raw material is metal magnesium.

As an example, the mass ratio of magnesium to montmorillonite is (0.4-3):1, for example, it can be 0.4:1, 0.5:1, 0.6:1, 0.9:1, 1.2:1, 1.5:1, 2 :1, 2.4:1, 3:1, etc.

It should be noted that, step S1 and step S2 are not in sequence.

The heating assembly 150 heats the outer tube 120, and the heating temperature can be 550-800°C, for example, 550°C, 580°C, 600°C, 610°C, 620°C, 630°C, 640°C, 650°C, 660°C, 670°C , 680°C, 690°C, 700°C, 730°C, 760°C, 800°C, etc.

A shielding gas is introduced into the first material chamber 111, or a shielding gas is introduced into the second material chamber 121; as an example, the shielding gas may be N ₂ , Ar, He or other gases. As an example, the inlet speed of the shielding gas may be 1-10L/min, for example, it may be 1L/min, 2L/min, 3L/min, 4L/min, 5L/min, 6L/min, 7L/min, 8L/min, 9L/min, 10L/min, etc.

Drive the inner tube 110 and the outer tube 120 to rotate; as an example, the rotation speed of the inner tube 110 may be 160-240r/min, for example, may be 160r/min, 170r/min, 180r/min, 190r/min, 200r/min , 210r/min, 220r/min, 230r/min, 240r/min, etc.; the rotation speed of the outer tube 120 can be 30-80r/min, for example, it can be 30r/min, 40r/min, 50r/min, 60r/min , 70r/min, 80r/min and so on.

The reaction time of the material in the reaction furnace 100 can be 4-10h, for example, it can be 4h, 5h, 6h, 7h, 8h or 9h and so on.

In some embodiments, after the reaction in the reaction furnace 100 is completed, the reaction product is washed with acid, the solid phase is leached with HF, and then dried. For example, HCl acid wash can be used.

For example, in this embodiment, the preparation process is as follows:

500g of montmorillonite and 2500g of NaCl were placed in the second material chamber 121, 300g of magnesium metal was evenly mixed and placed in the first material chamber 111, and argon was introduced into the first material chamber 111, and the air flow rate was 6L/min; heating assembly 150 heats the inside of the first material chamber 111 to 650°C. The rotational speed of the inner tube 110 is 200 r/min, and the rotational speed of the outer tube 120 is 60 r/min; the reaction is performed for 5 hours and then cooled naturally.

The reacted products were taken out, washed with distilled water and 1 mol/L HCl respectively, then leached with 1 wt% HF, washed with ultrapure water until neutral, and dried in vacuum at 60 °C to obtain nano-silicon materials. The nano-silicon material has a porous structure, contains high-purity nano-silicon, and has a larger specific surface area.

The preparation method based on the reaction furnace 100 provided in this embodiment has at least the following advantages:

During the reaction process, the metal magnesium in the first material cavity 111 can enter the second material cavity 121 relatively slowly and uniformly to react with montmorillonite and NaCl; The size of the aperture, the rotational speed of the inner tube 110 and the rotational speed of the outer tube 120 control the speed of the reaction.

The metal magnesium enters the second material cavity 121 from the discharge hole 112 in a liquid or gaseous state gradually, and then contacts and reacts with the montmorillonite, which effectively avoids the excess heat generated by the reaction between a large amount of magnesium powder and the montmorillonite, thereby avoiding the generated nanometer The silicon melts or generates a miscellaneous phase; further, the stirring of the stirring blade 113 in the second material chamber 121 can prevent the accumulation of heat in the reaction system, and at the same time make the contact of the reactants more uniform; Under the control of other conditions, the process of the reaction can be regulated.

Example 3

Embodiment 3 provides a process for preparing materials in the reaction furnace 100 shown in Embodiment 1, which mainly includes the following steps:

Step S1: placing clay minerals in the second material cavity 121;

Step S2: placing the soil additive in the first material cavity 111;

As an example, the clay mineral is palygorskite, and the soil additive is potassium dihydrogen phosphate; for example, the mass ratio of palygorskite and potassium dihydrogen phosphate is (15-28):5, for example, it can be 15:5, 18: 5, 20:5, 22:5, 23:5, 25:5, 28:5, etc.

Step S1 and step S2 are not in order.

Drive the inner tube 110 and the outer tube 120 to rotate; as an example, the rotation speed of the inner tube 110 may be 60-140r/min, for example, may be 60r/min, 70r/min, 80r/min, 90r/min, 100r/min , 110r/min, 120r/min, 130r/min, 140r/min, etc; , 35r/min, 40r/min, 50r/min and so on.

The heating component 150 heats the outer tube 120 so that the temperature in the second material chamber 121 is 250-320°C, such as 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, 320°C and so on.

The reaction time in the reaction furnace 100 can be 1-4h, for example, it can be 1h, 2h, 3h, 4h and so on.

For example, in this embodiment, the preparation process is as follows:

2200g palygorskite was placed in the second material chamber 121, 500g potassium dihydrogen phosphate was placed in the first material chamber 111, the inner tube 110 was rotated at 100 r/min, and the outer tube 120 was rotated at 30 r/min.

The heating component 150 heats the first material chamber 111 to 280°C. The palygorskite-loaded polyphosphate soil conditioner was obtained by natural cooling after 2 hours of reaction. The soil conditioner has a rod-like morphology, and phosphorus is uniformly loaded on the palygorskite surface.

The preparation method based on the reaction furnace 100 provided in this embodiment has at least the following advantages:

During the reaction process, the potassium dihydrogen phosphate in the first material cavity 111 can relatively slowly and uniformly enter the second material cavity 121 to react with palygorskite; the effect of slow release and slow reaction is achieved, and the obtained soil conditioner is polymerized in Phosphate can be relatively evenly distributed on the palygorskite surface.

In detail, in the reaction furnace 100, the potassium dihydrogen phosphate in the inner tube 110 is first melted, and then gradually released and mixed with the palygorskite to react and combine. The soil conditioner avoids the problem of uneven loading caused by the uneven and uncontrollable traditional high-temperature solid-phase reaction; in addition, in the present application, the existing two-step reaction of mixing first and then heating is improved to a one-step preparation using the reaction furnace 100, Simplify the reaction process.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (9)

1. A process for the production of materials based on a reaction furnace, characterized in that it comprises:

the inner pipe is provided with a first material cavity, and a discharge hole which penetrates through the inner pipe and is communicated with the first material cavity is formed in the inner pipe;

the first driving piece is connected with the inner pipe and is used for driving the inner pipe to rotate;

the outer pipe is sleeved outside the inner pipe and is rotationally connected with the inner pipe, and a second material cavity is formed between the inner pipe and the outer pipe;

the second driving piece is connected with the outer pipe and is used for driving the outer pipe to rotate; and

the heating assembly is sleeved outside the outer pipe and is rotationally connected with the outer pipe;

the production process comprises the following steps:

placing a first raw material in the first material cavity, and placing a second raw material in the second material cavity;

the heating assembly heats the first feedstock and the second feedstock;

rotating the inner pipe and the outer pipe, and introducing protective gas into the first material cavity or the second material cavity;

the first raw material enters the second raw material cavity through the material hole to react with the second raw material;

the first raw material comprises clay mineral and salt, the second raw material comprises at least one of magnesium, aluminum, sodium, potassium, calcium and zinc, and the salt comprises NaCl, LiCl, KCl, CaCl ₂ 、ZnCl ₂ 、MgCl ₂ At least one of (1).

2. The reactor-based material production process of claim 1, wherein a stirring blade is provided at a side of the inner tube adjacent to the outer tube.

3. The reactor-based material production process according to claim 2, wherein the stirring blade includes an extension portion connected to the inner tube, the extension portion extending in a direction perpendicular to an axial direction of the inner tube, and a stirring portion connected to a free end of the extension portion, the stirring portion extending in a direction parallel to the axial direction of the inner tube.

4. The process for producing a reaction furnace-based material according to claim 1,

the clay mineral is montmorillonite, and the salt is NaCl; the second raw material is magnesium; the heating assembly heats the first raw material and the second raw material to 600-700 ℃.

5. The process for producing a reaction furnace-based material according to claim 1,

and the flow speed of the protective gas introduced into the first material cavity or the second material cavity is 1-10L/min.

6. The process for producing materials based on reaction furnace as claimed in claim 1, wherein after the first raw material enters the second material chamber through the material hole and reacts with the second raw material, the process further comprises:

washing the reaction product with acid, leaching the solid phase with HF, and drying.

7. A process for the production of a material based on a reaction furnace, characterized in that the reaction furnace comprises:

the inner pipe is provided with a first material cavity, and a discharge hole which penetrates through the inner pipe and is communicated with the first material cavity is formed in the inner pipe;

the first driving piece is connected with the inner pipe and is used for driving the inner pipe to rotate;

the outer pipe is sleeved outside the inner pipe and is rotationally connected with the inner pipe, and a second material cavity is formed between the inner pipe and the outer pipe;

the second driving piece is connected with the outer pipe and is used for driving the outer pipe to rotate; and

the heating assembly is sleeved outside the outer pipe and is rotationally connected with the outer pipe;

the production process comprises the following steps:

placing a first raw material in the first material cavity, and placing a second raw material in the second material cavity;

the heating assembly heats the first feedstock and the second feedstock;

rotating the inner pipe and the outer pipe, and introducing protective gas into the first material cavity or the second material cavity;

the first raw material enters the second raw material cavity through the material hole to react with the second raw material;

the first raw material is clay mineral; the second raw material is a soil additive.

8. The reactor-based material production process of claim 7, wherein the first raw material is palygorskite; the second raw material is potassium dihydrogen phosphate.

9. The process for producing a reaction furnace-based material according to claim 7,

the rotating speed of the inner pipe is 60-140r/min, and the rotating speed of the outer pipe is 20-50 r/min.

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