CN110156019A - Electric arc furnace for preparing titanium carbide slag and preparation method of titanium carbide slag - Google Patents
Electric arc furnace for preparing titanium carbide slag and preparation method of titanium carbide slag Download PDFInfo
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- CN110156019A CN110156019A CN201910543633.XA CN201910543633A CN110156019A CN 110156019 A CN110156019 A CN 110156019A CN 201910543633 A CN201910543633 A CN 201910543633A CN 110156019 A CN110156019 A CN 110156019A
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- 239000002893 slag Substances 0.000 title claims abstract description 104
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000010891 electric arc Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000010936 titanium Substances 0.000 claims abstract description 99
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 99
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims abstract description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 17
- 239000012141 concentrate Substances 0.000 claims abstract description 16
- 238000003763 carbonization Methods 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 25
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 229910052791 calcium Inorganic materials 0.000 abstract description 5
- 239000011575 calcium Substances 0.000 abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 abstract description 5
- 239000011777 magnesium Substances 0.000 abstract description 5
- 229910052710 silicon Inorganic materials 0.000 abstract description 5
- 239000010703 silicon Substances 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/921—Titanium carbide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/08—Heating by electric discharge, e.g. arc discharge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及碳化钛渣制备领域，尤其是一种实现高钛型高炉渣、细粒级钛精矿、钛渣除尘灰的综合利用的用于制备碳化钛渣的电弧炉及碳化钛渣制备方法，包括炉体和设置于炉体上的炉盖，所述电弧炉还设置有热装系统、喷吹系统和出渣系统。本发明实现了将细粒级钛精矿和钛渣除尘灰应用到高钛型高炉渣的碳化过程中，有效利用其中的钛、铁成分，多余的钙、镁、铝、硅等氧化物也不会对碳化钛渣产品造成不良影响。通过采用喷吹加料的方式，可有效避免物料粒度过细的问题，不易造成环境污染。既可以实现固体废弃物的有效利用，又有利于高钛型高炉渣向碳化钛渣的转变过程，对减轻环保压力和提高钛资源利用率具有重要意义。本发明尤其适用于碳化钛渣制备之中。
The invention relates to the field of preparation of titanium carbide slag, in particular to an electric arc furnace for preparing titanium carbide slag and a preparation method of titanium carbide slag, which realize comprehensive utilization of high-titanium type blast furnace slag, fine-grained titanium concentrate, and titanium slag dedusting ash , including a furnace body and a furnace cover arranged on the furnace body, and the electric arc furnace is also provided with a hot charging system, an injection system and a slag discharge system. The invention realizes the application of fine-grained titanium concentrate and titanium slag dedusting ash to the carbonization process of high-titanium blast furnace slag, effectively utilizing the titanium and iron components therein, and reducing the excess calcium, magnesium, aluminum, silicon and other oxides It will not cause adverse effects on titanium carbide slag products. By adopting the injection feeding method, it can effectively avoid the problem that the particle size of the material is too fine, and it is not easy to cause environmental pollution. It can not only realize the effective utilization of solid waste, but also facilitate the transformation process of high-titanium blast furnace slag into titanium carbide slag, which is of great significance to reduce the pressure on environmental protection and improve the utilization rate of titanium resources. The invention is especially suitable for the preparation of titanium carbide slag.
Description
技术领域technical field
本发明涉及碳化钛渣制备领域，尤其是一种用于制备碳化钛渣的电弧炉及碳化钛渣制备方法。The invention relates to the field of preparation of titanium carbide slag, in particular to an electric arc furnace for preparing titanium carbide slag and a preparation method of titanium carbide slag.
背景技术Background technique
高炉冶炼钒钛磁铁矿会产生大量的炉渣，这些炉渣约含有10％～30％的二氧化钛，称之为高钛型高炉渣。高炉冶炼钒钛磁铁矿每生产1吨铁水，约产生0.65吨的炉渣，大量的含钛高炉渣堆存不但会污染环境，还会造成钛资源的严重浪费。Blast furnace smelting vanadium-titanium magnetite will produce a large amount of slag, which contains about 10% to 30% titanium dioxide, which is called high-titanium blast furnace slag. Blast furnace smelting vanadium-titanium magnetite produces about 0.65 tons of slag for every ton of molten iron produced. The accumulation of a large amount of titanium-containing blast furnace slag will not only pollute the environment, but also cause serious waste of titanium resources.
钛精矿用来冶炼钛渣时，要求其粒度不能过细，一般要求200目以下不超过10％。这是因为粒度过细，冶炼过程中粉尘量增大，会降低钛收率，同时物料透气性变差，容易生成泡沫渣等异常工况，影响环境和冶炼过程正常进行。通常进入钛渣电炉的钛精矿要进行分级处理，一部分粒度较细(一般小于200目)的钛精矿将得不到良好利用。另外，钛精矿冶炼钛渣的过程中会收集到大量的除尘灰，据统计，每生产1吨钛渣约产生85～100kg的除尘灰。这些除尘灰目前以固废物堆弃处理为主。When titanium concentrate is used to smelt titanium slag, its particle size is required not to be too fine, and generally requires no more than 10% below 200 mesh. This is because the particle size is too fine, the amount of dust increases during the smelting process, which will reduce the titanium yield, and at the same time, the air permeability of the material will become poor, and abnormal working conditions such as foamy slag will easily be generated, which will affect the environment and the normal smelting process. Usually, the titanium concentrate entering the titanium slag electric furnace needs to be graded, and a part of the titanium concentrate with a finer particle size (generally less than 200 mesh) will not be well utilized. In addition, a large amount of dedusting ash will be collected during the process of smelting titanium slag from titanium concentrate. According to statistics, about 85-100kg of dedusting ash is produced for every ton of titanium slag produced. These dust ash are currently mainly disposed of as solid waste.
细粒级钛精矿含有40％～50％的TiO2，30％～40％的铁氧化物，其余的为钙、镁、铝、硅等氧化物；钛渣除尘灰含有20％～45％的TiO2，20～40％的铁氧化物，其余的为钙、镁、铝、硅等氧化物；高钛型高炉渣含有10％～30％的TiO2，3～10％的铁氧化物，其余的为钙、镁、铝、硅等氧化物。这三种含钛物料组分相似，高钛型高炉渣目前主要以制备碳化钛渣，生产四氯化钛为主要利用路线。钛渣冶炼厂产生的细粒级钛精矿和钛渣除尘灰都因粒度较细，目前得不到有效的利用。Fine-grained titanium concentrate contains 40% to 50% TiO 2 , 30% to 40% iron oxide, and the rest is calcium, magnesium, aluminum, silicon and other oxides; titanium slag dust contains 20% to 45% TiO 2 , 20-40% iron oxide, and the rest are calcium, magnesium, aluminum, silicon and other oxides; high-titanium blast furnace slag contains 10%-30% TiO 2 , 3-10% iron oxide , and the rest are calcium, magnesium, aluminum, silicon and other oxides. The components of these three titanium-containing materials are similar. At present, high-titanium blast furnace slag is mainly used to prepare titanium carbide slag and produce titanium tetrachloride as the main utilization route. The fine-grained titanium concentrate and titanium slag dedusting ash produced by the titanium slag smelter cannot be effectively utilized due to their fine particle size.
发明内容Contents of the invention
本发明所要解决的技术问题是提供一种实现高钛型高炉渣、细粒级钛精矿、钛渣除尘灰的综合利用的用于制备碳化钛渣的电弧炉及碳化钛渣制备方法。The technical problem to be solved by the present invention is to provide an electric arc furnace for preparing titanium carbide slag and a preparation method of titanium carbide slag to realize the comprehensive utilization of high-titanium blast furnace slag, fine-grained titanium concentrate, and titanium slag dedusting ash.
本发明解决其技术问题所采用的技术方案是：用于制备碳化钛渣的电弧炉，包括炉体和设置于炉体上的炉盖，所述电弧炉还设置有热装系统、喷吹系统和出渣系统。The technical solution adopted by the present invention to solve the technical problem is: an electric arc furnace for preparing titanium carbide slag, including a furnace body and a furnace cover arranged on the furnace body, and the electric arc furnace is also provided with a thermal charging system and an injection system and slag discharge system.
进一步的是，所述热装系统为设置于炉盖上的溜槽。Further, the thermal charging system is a chute arranged on the furnace cover.
进一步的是，所述喷吹系统为设置于炉体侧壁面的喷枪。Further, the injection system is a spray gun arranged on the side wall of the furnace body.
进一步的是，所述出渣系统为设置于炉体下部的出渣口。Further, the slag discharge system is a slag discharge port arranged at the lower part of the furnace body.
进一步的是，碳化钛渣制备方法，首先，将第一含钛物料通过热装系统进入电弧炉，送电升温；其次，将第二含钛物料及还原剂通过喷吹系统进入电弧炉，还原剂还原碳化所有含钛物料；最后，在反应结束后，炉渣从出渣系统排出，经冷却破碎除铁得到碳化钛渣。Further, the preparation method of titanium carbide slag, firstly, enter the first titanium-containing material into the electric arc furnace through the thermal charging system, and send electricity to raise the temperature; secondly, enter the second titanium-containing material and the reducing agent into the electric arc furnace through the injection system, and reduce Reduction and carbonization of all titanium-containing materials with an agent; finally, after the reaction is completed, the slag is discharged from the slag discharge system, and the titanium carbide slag is obtained by cooling, crushing and removing iron.
进一步的是，所述第一含钛物料为高钛型高炉渣，其TiO2含量10％～30％。Further, the first titanium-containing material is high-titanium blast furnace slag, and its TiO 2 content is 10%-30%.
进一步的是，所述第二含钛物料为粒度小于200目的细粒级钛精矿、钛渣冶炼除尘灰中的至少一种，其TiO2含量20％～50％。Further, the second titanium-containing material is at least one of fine-grained ilmenite concentrate and titanium slag smelting dust with a particle size of less than 200 meshes, and its TiO 2 content is 20%-50%.
进一步的是，还原剂的固定碳含量大于70％，粒度小于1mm，水分小于1.5％。Further, the fixed carbon content of the reducing agent is greater than 70%, the particle size is less than 1mm, and the water content is less than 1.5%.
进一步的是，还原剂固定碳含量大于80％，粒度小于0.2mm，水分小于0.5％。Further, the reducing agent has a fixed carbon content of more than 80%, a particle size of less than 0.2mm, and a water content of less than 0.5%.
进一步的是，所述第二含钛物料加入量为第一含钛物料加入量的5％～10％，所述还原剂加入量为第一含钛物料加入量的5％～25％。Further, the added amount of the second titanium-containing material is 5%-10% of the added amount of the first titanium-containing material, and the added amount of the reducing agent is 5%-25% of the added amount of the first titanium-containing material.
本发明的有益效果是：本发明实现了将细粒级钛精矿和钛渣除尘灰应用到高钛型高炉渣的碳化过程中，可有效利用其中的钛、铁成分，多余的钙、镁、铝、硅等氧化物也不会对碳化钛渣产品造成不良影响。通过采用喷吹加料的方式，可有效避免物料粒度过细的问题，不易造成环境污染。另外，细粒级钛精矿和钛渣除尘灰中的铁对碳化钛渣的晶体长大等有作用。既可以实现固体废弃物的有效利用，又有利于高钛型高炉渣向碳化钛渣的转变过程，对减轻环保压力和提高钛资源利用率具有重要意义。本发明尤其适用于碳化钛渣制备之中。The beneficial effects of the present invention are: the present invention realizes the application of fine-grained titanium concentrate and titanium slag dedusting ash to the carbonization process of high-titanium blast furnace slag, which can effectively utilize the titanium and iron components, and the excess calcium and magnesium , aluminum, silicon and other oxides will not have adverse effects on titanium carbide slag products. By adopting the injection feeding method, it can effectively avoid the problem that the particle size of the material is too fine, and it is not easy to cause environmental pollution. In addition, the iron in the fine-grained titanium concentrate and titanium slag dedusting ash has an effect on the crystal growth of titanium carbide slag. It can not only realize the effective utilization of solid waste, but also facilitate the transformation process of high-titanium blast furnace slag to titanium carbide slag, which is of great significance to reduce the pressure on environmental protection and improve the utilization rate of titanium resources. The invention is especially suitable for the preparation of titanium carbide slag.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a schematic structural view of the present invention.
图中标记为：炉体1、炉盖2、溜槽3、喷枪4、出渣口5。The marks in the figure are: furnace body 1, furnace cover 2, chute 3, spray gun 4, and slag outlet 5.
具体实施方式Detailed ways
下面结合附图和实施例对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
如图1所示的用于制备碳化钛渣的电弧炉，包括炉体1和设置于炉体1上的炉盖2，所述电弧炉还设置有热装系统、喷吹系统和出渣系统。在实际操作时，首先，将第一含钛物料通过热装系统进入电弧炉，送电升温；其次，将第二含钛物料及还原剂通过喷吹系统进入电弧炉，还原剂还原碳化所有含钛物料；最后，在反应结束后，炉渣从出渣系统排出，经冷却破碎除铁得到碳化钛渣。The electric arc furnace used to prepare titanium carbide slag as shown in Figure 1 includes a furnace body 1 and a furnace cover 2 arranged on the furnace body 1, and the electric arc furnace is also provided with a thermal charging system, an injection system and a slag discharge system . In actual operation, first, the first titanium-containing material enters the electric arc furnace through the thermal charging system, and the temperature is raised by power transmission; secondly, the second titanium-containing material and the reducing agent enter the electric arc furnace through the injection system, and the reducing agent reduces and carbonizes all the titanium-containing materials. Titanium material; finally, after the reaction is finished, the slag is discharged from the slag discharge system, and the titanium carbide slag is obtained by cooling, crushing and removing iron.
为了对电弧炉进行结构的精简，如图1所示，可以选择这样的方案：优选所述热装系统为设置于炉盖2上的溜槽3；优选所述喷吹系统为设置于炉体1侧壁面的喷枪4；优选所述出渣系统为设置于炉体1下部的出渣口5。结构优化后的电弧炉具有了制作成本低，反应效果佳的技术优势。另外，所述溜槽3与炉盖2之间优选增设密封装置，从而保证溜槽3周围有较好的密封效果。为了获得理想的喷吹效果，优选喷吹系统至少包含两路喷枪4，喷枪4固定在电炉炉壁上。In order to simplify the structure of the electric arc furnace, as shown in Figure 1, such a scheme can be selected: preferably the thermal charging system is a chute 3 arranged on the furnace cover 2; preferably the injection system is arranged on the furnace body 1 The spray gun 4 on the side wall surface; preferably, the slag discharge system is a slag discharge port 5 arranged at the lower part of the furnace body 1 . The electric arc furnace with optimized structure has the technical advantages of low production cost and good reaction effect. In addition, a sealing device is preferably added between the chute 3 and the furnace cover 2 to ensure a better sealing effect around the chute 3 . In order to obtain ideal blowing effect, preferably the blowing system includes at least two spray guns 4, and the spray guns 4 are fixed on the furnace wall of the electric furnace.
就具体的碳化钛渣制备方法而言，为了获得更为理想的制备结果，可以在相应物料的选取和配比上做如下的改进优化：所述第一含钛物料为高钛型高炉渣，其TiO2含量10％～30％；所述第二含钛物料为粒度小于200目的细粒级钛精矿、钛渣冶炼除尘灰中的至少一种，其TiO2含量20％～50％；还原剂固定碳含量大于70％，粒度小于1mm，水分小于1.5％，优选的还原剂固定碳含量大于80％，粒度小于0.2mm，水分小于0.5％。As far as the specific preparation method of titanium carbide slag is concerned, in order to obtain more ideal preparation results, the following improvements and optimizations can be made in the selection and proportioning of corresponding materials: the first titanium-containing material is high-titanium blast furnace slag, Its TiO 2 content is 10% to 30%; the second titanium-containing material is at least one of fine-grained titanium concentrate with a particle size of less than 200 mesh and titanium slag smelting dust, and its TiO 2 content is 20% to 50%; The fixed carbon content of the reducing agent is greater than 70%, the particle size is less than 1mm, and the moisture is less than 1.5%. The preferred reducing agent has a fixed carbon content greater than 80%, the particle size is less than 0.2mm, and the moisture is less than 0.5%.
就具体的物料添加而言，可以考虑所述第二含钛物料加入量为第一含钛物料加入量的0～15％，优选5％～10％。所述还原剂加入量应满足使所有含钛物料中的钛全部转化为碳化钛并过量110％～130％，一般为第一含钛物料加入量的5％～25％。还可以选择第二含钛物料与还原剂单独喷入电炉，也可混合后一起喷吹进入电炉，即可以根据实际需求灵活选取。In terms of specific material addition, it can be considered that the addition amount of the second titanium-containing material is 0-15% of the first titanium-containing material addition, preferably 5%-10%. The adding amount of the reducing agent should be enough to convert all the titanium in the titanium-containing material into titanium carbide with an excess of 110%-130%, generally 5%-25% of the adding amount of the first titanium-containing material. It is also possible to choose the second titanium-containing material and the reducing agent to be sprayed into the electric furnace separately, or they can be mixed and sprayed into the electric furnace together, that is, they can be flexibly selected according to actual needs.
另外，物料添加还有如下的优化方案：即将第一含钛物料加入电炉送电升温，待熔渣温度>1400℃，开始加入第二含钛物料和还原剂，单根喷枪4喷吹速度90～160kg/min。还原碳化温度1400～1650℃，碳化时间为(5min～10min)×含钛物料加入量。In addition, there is the following optimization plan for material addition: the first titanium-containing material is added to the electric furnace to increase the temperature, and when the slag temperature is >1400°C, the second titanium-containing material and reducing agent are added, and the injection speed of a single spray gun 4 is 90 ~160kg/min. The reducing carbonization temperature is 1400-1650°C, and the carbonization time is (5min-10min)×the amount of titanium-containing material added.
实施例Example
实施例1Example 1
打开电炉接渣口塞头，将第一含钛物料(TiO2含量10％)20吨通过溜槽3热装进入电炉中，关闭塞头，送电升温。将细粒级钛精矿作为第二含钛物料与还原剂进行混合，第二含钛物料TiO2含量45％，加入量1吨，还原剂固定碳75％，粒度小于1mm，水分1％，加入量1.5吨。测量电炉内熔渣温度1400℃，打开2路喷枪4阀门，开始加入第二含钛物料和还原剂的混合物，单枪喷吹速度90kg/min。喷吹过程中维持电炉内温度1450℃～1600℃，碳化反应时间100min。碳化反应结束后，利用开堵口机打开出渣口，出渣。出炉渣经打水冷却后，破碎除铁得到碳化钛渣。Open the plug of the slag-connecting port of the electric furnace, and enter 20 tons of the first titanium-containing material (TiO 2 content 10%) into the electric furnace through the chute 3 hot-packing, close the plug, and send electricity to heat up. Fine-grained titanium concentrate is mixed with the reducing agent as the second titanium-containing material. The TiO2 content of the second titanium-containing material is 45%, the addition amount is 1 ton, the reducing agent fixes carbon by 75%, the particle size is less than 1mm, and the water content is 1%. The addition amount is 1.5 tons. Measure the slag temperature in the electric furnace to 1400°C, open the 4 valves of the 2-way spray gun, and start to add the mixture of the second titanium-containing material and the reducing agent, and the injection speed of a single gun is 90kg/min. During the injection process, the temperature in the electric furnace is maintained at 1450°C to 1600°C, and the carbonization reaction time is 100min. After the carbonization reaction is completed, use a plugging machine to open the slag outlet to discharge the slag. After the furnace slag is cooled by pumping water, it is crushed and iron removed to obtain titanium carbide slag.
实施例2Example 2
打开电炉接渣口塞头，将第一含钛物料(TiO2含量22％)40吨通过溜槽3热装进入电炉中，关闭塞头，送电升温。将钛渣除尘灰作为第二含钛物料与还原剂进行混合，第二含钛物料TiO2含量25％，加入量4吨，还原剂固定碳80％，粒度小于0.5mm，水分0.5％，加入量8吨。测量电炉内熔渣温度1450℃，打开2路喷枪4阀门，开始加入第二含钛物料和还原剂的混合物，单枪喷吹速度130kg/min。喷吹过程中维持电炉内温度1500℃～1650℃，碳化反应时间300min。碳化反应结束后，利用开堵口机打开出渣口，出渣。出炉渣经缓慢冷却后，破碎除铁得到碳化钛渣。Open the plug of the slag-connecting port of the electric furnace, and enter 40 tons of the first titanium-containing material (TiO 2 content 22%) into the electric furnace by hot-packing through the chute 3, close the plug, and send electricity to heat up. Titanium slag dust is mixed with the reducing agent as the second titanium-containing material. The second titanium-containing material has a TiO2 content of 25%, an addition of 4 tons, a reducing agent that fixes carbon by 80%, a particle size of less than 0.5mm, and a moisture content of 0.5%. The volume is 8 tons. Measure the slag temperature in the electric furnace to 1450°C, open the 4 valves of the 2-way spray gun, and start to add the mixture of the second titanium-containing material and the reducing agent, and the injection speed of a single gun is 130kg/min. During the injection process, the temperature in the electric furnace is maintained at 1500°C to 1650°C, and the carbonization reaction time is 300min. After the carbonization reaction is completed, use a plugging machine to open the slag outlet to discharge the slag. After the slag is cooled slowly, it is crushed and iron removed to obtain titanium carbide slag.
实施例3Example 3
打开电炉接渣口塞头，将第一含钛物料(TiO2含量30％)60吨通过溜槽3热装进入电炉中，关闭塞头，送电升温。将钛渣除尘灰作为第二含钛物料，第二含钛物料TiO2含量35％，加入量10吨，还原剂固定碳85％，粒度小于0.2mm，水分0.5％，加入量15吨。测量电炉内熔渣温度1450℃，打开3路喷枪4阀门，开始加入第二含钛物料和还原剂，第二含钛物料和还原剂单独喷入电炉内，单枪喷吹速度150kg/min。喷吹过程中维持电炉内温度1400℃～1650℃，碳化反应时间600min。碳化反应结束后，利用开堵口机打开出渣口，出渣。出炉渣经水淬冷却后，破碎除铁得到碳化钛渣。Open the plug of the slag-connecting port of the electric furnace, heat-pack 60 tons of the first titanium-containing material (TiO 2 content 30%) into the electric furnace through the chute 3, close the plug, and send electricity to heat up. The titanium slag dedusting ash is used as the second titanium-containing material. The second titanium-containing material has a TiO2 content of 35%, an addition of 10 tons, a reducing agent to fix carbon of 85%, a particle size of less than 0.2mm, and a moisture content of 0.5%, and an addition of 15 tons. Measure the slag temperature in the electric furnace at 1450°C, open the 4 valves of the 3-way spray gun, and start adding the second titanium-containing material and reducing agent. The second titanium-containing material and reducing agent are sprayed into the electric furnace separately, and the injection speed of a single gun is 150kg/min. During the injection process, the temperature in the electric furnace is maintained at 1400°C to 1650°C, and the carbonization reaction time is 600min. After the carbonization reaction is completed, use a plugging machine to open the slag outlet to discharge the slag. After the furnace slag is cooled by water quenching, it is crushed and iron removed to obtain titanium carbide slag.
通过上述的实施例，高钛型高炉渣、细粒级钛精矿或钛渣除尘灰均得到了充分利用。本发明的技术优势十分明显，市场推广前景广阔。Through the above-mentioned embodiments, high-titanium type blast furnace slag, fine-grained titanium concentrate or titanium slag dedusting dust are all fully utilized. The technical advantage of the invention is very obvious, and the market promotion prospect is broad.
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