CN117985935A - Leadless high-transparency glass for glass tableware and preparation method thereof - Google Patents

Abstract

The invention is suitable for the technical field of glass preparation, and provides lead-free high-transparency glass for glass tableware, which comprises the following raw materials in parts by weight: 60-70 parts of silicon dioxide, 9-14 parts of boron oxide, 5-12 parts of calcium oxide, 1-7 parts of magnesium oxide, 8-12 parts of aluminum oxide, 6-15 parts of sodium oxide, 3-7 parts of potassium oxide, 2-6 parts of magnesium oxide, 1-2 parts of ferric oxide, 4-8 parts of barium oxide, 5-8 parts of broken glass and 10-12 parts of auxiliary materials. The invention can play a role in clarification by adding the clarifying agent, reduce bubbles generated in the glass manufacturing process, avoid generating defects such as bubbles, stripes, stones and the like, increase the clarity, and simultaneously, a layer of film can be formed after the nitrocellulose solution volatilizes by adding the nitrocellulose solution, and the film can protect the glass, so that the strength of the glass is increased, and the addition of the broken glass can help to melt to increase the capacity of the glass.

Description

Lead-free high-transparency glass for glass tableware and preparation method thereof

Technical Field

The present invention relates to the technical field of glass preparation, and in particular to lead-free high-transparency glass for glass tableware and a preparation method thereof.

Background technique

Glass tableware is a tableware that has been surface-processed, usually made of high-boron glass, which is heat-resistant, transparent, easy to use, and has the advantages of excellent sealing, health and safety, etc. The glass used to make tableware is a glass with enhanced fire resistance. The glass used in production is generally a glass with sodium oxide, boron oxide and silicon dioxide as basic components. For example, a lead-free high-transparency hard glass bowl and its preparation method are disclosed in a Chinese patent (authorization announcement number CN108218220B). The glass bowl made by this patented technology has high transparency, up to 96.1%, and does not contain lead elements, has no effect on human health, and has good strength, hardness and glossiness. The preparation method is simple and suitable for large-scale production.

However, there are still some shortcomings in this patent. First, the viscosity of the glass liquid cannot be reduced during the production of glass, which affects the melting and clarification of the glass. In addition, the strength of the glass is poor and it is easy to break. Therefore, those skilled in the art provide a lead-free high-transparency glass for glass tableware and a preparation method thereof to solve the problems raised in the above background technology.

Summary of the invention

The purpose of the present disclosure is to provide lead-free high-transparency glass for glass tableware and a preparation method thereof, aiming to solve the problems solved by existing exclusive rights.

To achieve this purpose, the present invention adopts the following technical scheme: lead-free high-transparency glass for glass tableware, including the following raw materials in parts by weight: 60-70 parts of silicon dioxide, 9-14 parts of boron oxide, 5-12 parts of calcium oxide, 1-7 parts of magnesium oxide, 8-12 parts of aluminum oxide, 6-15 parts of sodium oxide, 3-7 parts of potassium oxide, 2-6 parts of magnesium oxide, 1-2 parts of iron oxide, 4-8 parts of barium oxide, and 10-12 parts of auxiliary materials.

Preferably, the raw materials include the following parts by weight: 60 parts of silicon dioxide, 9 parts of boron oxide, 5 parts of calcium oxide, 1 part of magnesium oxide, 8 parts of aluminum oxide, 6 parts of sodium oxide, 3 parts of potassium oxide, 2 parts of magnesium oxide, 1 part of iron oxide, 4 parts of barium oxide, and 10 parts of auxiliary materials.

Preferably, the raw materials include the following parts by weight: 65 parts of silicon dioxide, 11 parts of boron oxide, 9 parts of calcium oxide, 5 parts of magnesium oxide, 10 parts of aluminum oxide, 10 parts of sodium oxide, 5 parts of potassium oxide, 4 parts of magnesium oxide, 1 part of iron oxide, 6 parts of barium oxide, and 11 parts of auxiliary materials.

Preferably, the raw materials include the following parts by weight: 70 parts of silicon dioxide, 14 parts of boron oxide, 12 parts of calcium oxide, 7 parts of magnesium oxide, 12 parts of aluminum oxide, 15 parts of sodium oxide, 7 parts of potassium oxide, 6 parts of magnesium oxide, 2 parts of iron oxide, 8 parts of barium oxide, and 12 parts of auxiliary materials.

Preferably, the auxiliary material comprises the following raw materials in parts by weight: 1-2 parts of a clarifier and 3-5 parts of a nitrocellulose solution, wherein the clarifier is any one or more of white arsenic, sodium sulfate, sodium nitrate and ammonium salt.

A method for preparing lead-free high-transparency glass for glass tableware comprises the following steps:

S1, weighing raw materials according to weight, and crushing, mixing and sieving the raw materials;

S2, putting the raw materials processed in S1 into a melting furnace for melting, so as to obtain glass liquid;

S3, cooling the glass stock solution of step S2, and injecting it into the mold after cooling, and at the same time using the mold equipment to send the cooled glass stock solution into the forming mold for blow molding;

S4, sending the blown glass into an annealing furnace for annealing;

S5. After the treated glass is annealed in the annealing furnace, it is kept at room temperature for 30-40 minutes, and then dried, inspected, packaged and stored.

Preferably, the melting temperature of S2 is 1350-1450° C. and needs to be kept warm for 30-50 hours.

Preferably, the cooling temperature of the glass stock solution in S3 is 1050-1100°C, and the blowing temperature of the molding mold is controlled to be 1100-1200°C.

Preferably, in S5, the temperature of the high temperature zone of the annealing furnace is controlled to be 520-570°C for 35-40 min; the temperature of the low temperature zone of the annealing furnace is controlled to be 350-380°C for 80-120 min; the temperature of the insulation zone of the annealing furnace is reduced from 350°C to room temperature along the discharge direction for 40-60 min to obtain the treated glass.

Preferably, the sieving in S1 is performed by sieving through a 200-mesh sieve, and during the mixing, the stirring efficiency is improved by rotating the stirring rod forward and reversely, and the stirring rate is 220 rad/min.

The beneficial effects of the present invention are as follows: the present invention can play a clarifying role by adding a clarifying agent, reduce bubbles generated in the process of glass making, improve the melting quality, avoid defects such as bubbles, streaks, stones, and increase the clarity. At the same time, by adding a nitrocellulose solution, a thin film can be formed after the nitrocellulose solution evaporates, and this thin film can protect the glass, thereby increasing the strength of the glass. Adding broken glass can help melt to increase the capacity of the glass. At the same time, increasing the content of silicon dioxide or boron oxide makes it more resistant to high temperature and chemical corrosion. Barium oxide can improve the heat resistance and chemical stability of the glass. Calcium oxide and magnesium oxide can reduce the high-temperature viscosity of the glass liquid. Sodium oxide and potassium oxide have good solubility, reduce the viscosity of the glass, promote the melting and clarification of the glass liquid, and greatly reduce the crystallization tendency of the glass. The glass of the present invention has high transparency, does not contain lead elements, has no effect on human health, and can also improve the strength and hardness of the glass, increase the high temperature resistance and chemical corrosion resistance of the glass, so that the service life of the glass tableware can be extended.

Detailed ways

The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

Embodiment 1

Lead-free high-transparency glass for glass tableware includes the following raw materials in parts by weight: 60 parts of silicon dioxide, 9 parts of boron oxide, 5 parts of calcium oxide, 1 part of magnesium oxide, 8 parts of aluminum oxide, 6 parts of sodium oxide, 3 parts of potassium oxide, 2 parts of magnesium oxide, 1 part of iron oxide, 4 parts of barium oxide, 5 parts of broken glass, and 10 parts of auxiliary materials. The auxiliary materials include the following raw materials in parts by weight: 1-2 parts of clarifier and 3-5 parts of nitrocellulose solution. The clarifier is any one or more of white arsenic, sodium sulfate, sodium nitrate, and ammonium salt.

A method for preparing lead-free high-transparency glass for glass tableware comprises the following steps:

S1, weighing raw materials according to weight, and crushing, mixing and sieving the raw materials; sieving through a 200-mesh sieve in S1, and improving the stirring efficiency by rotating the stirring rod forward and reverse during mixing, and the stirring rate is 220 rad/min;

S2, putting the processed raw materials in S1 into a melting furnace for melting, so as to obtain glass liquid; the melting temperature in S2 is 1350-1450°C, and it needs to be kept warm for 30-50 hours;

S3, cooling the glass stock solution of step S2, and injecting it into the mold after cooling, and at the same time using the mold equipment to send the cooled glass stock solution into the forming mold for blowing molding; in S3, the cooling temperature of the glass stock solution is 1050-1100° C., and the blowing temperature of the forming mold is controlled to be 1100-1200° C.;

S4, sending the blown glass into an annealing furnace for annealing treatment; in S5, the temperature of the high temperature zone of the annealing furnace is controlled to be 520-570°C for 35-40 minutes; the temperature of the low temperature zone of the annealing furnace is controlled to be 350-380°C for 80-120 minutes; the temperature of the insulation zone of the annealing furnace is reduced from 350°C to room temperature along the discharge direction, and the insulation time is 40-60 minutes to obtain the treated glass;

S5. After the treated glass is annealed in the annealing furnace, it is kept at room temperature for 30-40 minutes, and then dried, inspected, packaged and stored.

Embodiment 2

Lead-free high-transparency glass for glass tableware includes the following raw materials in parts by weight: 65 parts of silicon dioxide, 11 parts of boron oxide, 9 parts of calcium oxide, 5 parts of magnesium oxide, 10 parts of aluminum oxide, 10 parts of sodium oxide, 5 parts of potassium oxide, 4 parts of magnesium oxide, 1 part of iron oxide, 6 parts of barium oxide, 6 parts of broken glass, and 11 parts of auxiliary materials. The auxiliary materials include the following raw materials in parts by weight: 1-2 parts of clarifier and 3-5 parts of nitrocellulose solution. The clarifier is any one or more of white arsenic, sodium sulfate, sodium nitrate, and ammonium salt.

A method for preparing lead-free high-transparency glass for glass tableware comprises the following steps:

S1, weighing raw materials according to weight, and crushing, mixing and sieving the raw materials; sieving through a 200-mesh sieve in S1, and improving the stirring efficiency by rotating the stirring rod forward and reverse during mixing, and the stirring rate is 220 rad/min;

S2, putting the processed raw materials in S1 into a melting furnace for melting, so as to obtain glass liquid; the melting temperature in S2 is 1350-1450°C, and it needs to be kept warm for 30-50 hours;

S3, cooling the glass stock solution of step S2, and injecting it into the mold after cooling, and at the same time using the mold equipment to send the cooled glass stock solution into the forming mold for blowing molding; in S3, the cooling temperature of the glass stock solution is 1050-1100° C., and the blowing temperature of the forming mold is controlled to be 1100-1200° C.;

S4, sending the blown glass into an annealing furnace for annealing treatment; in S5, the temperature of the high temperature zone of the annealing furnace is controlled to be 520-570°C for 35-40 minutes; the temperature of the low temperature zone of the annealing furnace is controlled to be 350-380°C for 80-120 minutes; the temperature of the insulation zone of the annealing furnace is reduced from 350°C to room temperature along the discharge direction, and the insulation time is 40-60 minutes to obtain the treated glass;

S5. After the treated glass is annealed in the annealing furnace, it is kept at room temperature for 30-40 minutes, and then dried, inspected, packaged and stored.

Embodiment 3

Lead-free high-transparency glass for glass tableware includes the following raw materials in parts by weight: 70 parts of silicon dioxide, 14 parts of boron oxide, 12 parts of calcium oxide, 7 parts of magnesium oxide, 12 parts of aluminum oxide, 15 parts of sodium oxide, 7 parts of potassium oxide, 6 parts of magnesium oxide, 2 parts of iron oxide, 8 parts of barium oxide, 8 parts of broken glass, and 12 parts of auxiliary materials. The auxiliary materials include the following raw materials in parts by weight: 1-2 parts of clarifier and 3-5 parts of nitrocellulose solution. The clarifier is any one or more of white arsenic, sodium sulfate, sodium nitrate, and ammonium salt.

A method for preparing lead-free high-transparency glass for glass tableware comprises the following steps:

S1, weighing raw materials according to weight, and crushing, mixing and sieving the raw materials; sieving through a 200-mesh sieve in S1, and improving the stirring efficiency by rotating the stirring rod forward and reverse during mixing, and the stirring rate is 220 rad/min;

S2, putting the processed raw materials in S1 into a melting furnace for melting, so as to obtain glass liquid; the melting temperature in S2 is 1350-1450°C, and it needs to be kept warm for 30-50 hours;

S3, cooling the glass stock solution of step S2, and injecting it into the mold after cooling, and at the same time using the mold equipment to send the cooled glass stock solution into the forming mold for blowing molding; in S3, the cooling temperature of the glass stock solution is 1050-1100° C., and the blowing temperature of the forming mold is controlled to be 1100-1200° C.;

S4, sending the blown glass into an annealing furnace for annealing treatment; in S5, the temperature of the high temperature zone of the annealing furnace is controlled to be 520-570°C for 35-40 minutes; the temperature of the low temperature zone of the annealing furnace is controlled to be 350-380°C for 80-120 minutes; the temperature of the insulation zone of the annealing furnace is reduced from 350°C to room temperature along the discharge direction, and the insulation time is 40-60 minutes to obtain the treated glass;

S5. After the treated glass is annealed in the annealing furnace, it is kept at room temperature for 30-40 minutes, and then dried, inspected, packaged and stored.

The present invention can play a clarifying role by adding a clarifying agent, reduce bubbles generated in the process of glass making, improve the melting quality, avoid defects such as bubbles, streaks, stones, etc., and increase the clarity. At the same time, by adding a nitrocellulose solution, a thin film can be formed after the nitrocellulose solution evaporates, and the thin film can protect the glass, thereby increasing the strength of the glass. Adding broken glass can help melting to increase the capacity of the glass. At the same time, increasing the content of silicon dioxide or boron oxide makes it more resistant to high temperature and chemical corrosion. Barium oxide can improve the heat resistance and chemical stability of the glass. Calcium oxide and magnesium oxide can reduce the high-temperature viscosity of the glass liquid. Sodium oxide and potassium oxide have good solubility, reduce the viscosity of the glass, promote the melting and clarification of the glass liquid, and greatly reduce the crystallization tendency of the glass. The glass of the present invention has high transparency, does not contain lead elements, has no effect on human health, and can also improve the strength and hardness of the glass, increase the high-temperature resistance and chemical corrosion resistance of the glass, so that the service life of the glass tableware can be extended.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Lead-free high-transparency glass for glass tableware, characterized in that it comprises the following raw materials in parts by weight: 60-70 parts of silicon dioxide, 9-14 parts of boron oxide, 5-12 parts of calcium oxide, 1-7 parts of magnesium oxide, 8-12 parts of aluminum oxide, 6-15 parts of sodium oxide, 3-7 parts of potassium oxide, 2-6 parts of magnesium oxide, 1-2 parts of iron oxide, 4-8 parts of barium oxide, 5-8 parts of broken glass, and 10-12 parts of auxiliary materials. 2. The lead-free high-transparency glass for glass tableware as described in claim 1 is characterized by comprising the following raw materials in parts by weight: 60 parts of silicon dioxide, 9 parts of boron oxide, 5 parts of calcium oxide, 1 part of magnesium oxide, 8 parts of aluminum oxide, 6 parts of sodium oxide, 3 parts of potassium oxide, 2 parts of magnesium oxide, 1 part of iron oxide, 4 parts of barium oxide, 5 parts of broken glass, and 10 parts of auxiliary materials. 3. The lead-free high-transparency glass for glass tableware as described in claim 1 is characterized by comprising the following raw materials in parts by weight: 65 parts of silicon dioxide, 11 parts of boron oxide, 9 parts of calcium oxide, 5 parts of magnesium oxide, 10 parts of aluminum oxide, 10 parts of sodium oxide, 5 parts of potassium oxide, 4 parts of magnesium oxide, 1 part of iron oxide, 6 parts of barium oxide, 6 parts of broken glass, and 11 parts of auxiliary materials. 4. The lead-free high-transparency glass for glass tableware as claimed in claim 1 is characterized in that it comprises the following raw materials in parts by weight: 70 parts of silicon dioxide, 14 parts of boron oxide, 12 parts of calcium oxide, 7 parts of magnesium oxide, 12 parts of aluminum oxide, 15 parts of sodium oxide, 7 parts of potassium oxide, 6 parts of magnesium oxide, 2 parts of iron oxide, 8 parts of barium oxide, 8 parts of broken glass, and 12 parts of auxiliary materials. 5. The lead-free high-transparency glass for glass tableware and the preparation method thereof as claimed in claim 1, characterized in that the auxiliary materials include the following raw materials in parts by weight: 1-2 parts of a clarifier and 3-5 parts of a nitrocellulose solution, and the clarifier is any one or more of white arsenic, sodium sulfate, sodium nitrate, and ammonium salt. 6. The method for preparing lead-free high-transparency glass for glass tableware according to any one of claims 1 to 5, characterized in that it comprises the following steps: S1, weighing raw materials according to weight, and crushing, mixing and sieving the raw materials; S2, putting the raw materials processed in S1 into a melting furnace for melting, so as to obtain glass liquid; S3, cooling the glass stock solution of step S2, and injecting it into the mold after cooling, and at the same time using the mold equipment to send the cooled glass stock solution into the forming mold for blow molding; S4, sending the blown glass into an annealing furnace for annealing; S5. After the treated glass is annealed in the annealing furnace, it is kept at room temperature for 30-40 minutes, and then dried, inspected, packaged and stored. 7. The lead-free high-transparency glass for glass tableware and the preparation method thereof as claimed in claim 1, characterized in that the melting temperature of S2 is 1350-1450°C and needs to be kept warm for 30-50 hours. 8. The lead-free high-transparency glass for glass tableware and the preparation method thereof as claimed in claim 1, characterized in that the cooling temperature of the glass stock solution in S3 is 1050-1100°C, and the blowing temperature of the molding mold is controlled to be 1100-1200°C. 9. The lead-free high-transparency glass for glass tableware and the preparation method thereof as claimed in claim 1, characterized in that the temperature of the high temperature zone of the annealing furnace in S5 is controlled to be 520-570°C for 35-40 min; the temperature of the low temperature zone of the annealing furnace is controlled to be 350-380°C for 80-120 min; the temperature of the insulation zone of the annealing furnace is reduced from 350°C to room temperature along the discharge direction, and the insulation time is 40-60 min to obtain the treated glass. 10. The lead-free high-transparency glass for glass tableware and the preparation method thereof as claimed in claim 1, characterized in that the sieving in S1 is performed through a 200-mesh sieve, and during the mixing, the stirring efficiency is improved by rotating the stirring rod forward and reversely, and the stirring rate is 220 rad/min.