CN110627354A - Low-expansion microcrystalline glass tableware - Google Patents

Abstract

The invention discloses a low-expansion glass ceramic tableware, which belongs to the field of glass manufacturing; the invention uses quartz sand, sodium carbonate, calcite, aluminum hydroxide, sodium nitrate, barium carbonate, borax, sodium oxysilicate, anhydrous sodium sulphate, selenium powder and cobalt powder as raw materials, and the raw materials are mixed, melted, formed, annealed and toughened according to the formula amount to prepare the glass bowl, the used molten mass is essentially soda-lime glass, the content of silicon dioxide is 65-70%, the soda-lime glass also contains 15% of sodium oxide and 8% of calcium oxide, the soda-lime glass with the components is the most common glass, and has a series of advantages of low production cost, easy forming, large yield and the like, and the product glass bowl has the advantages of fine workmanship, beautiful appearance, high hardness, stable chemical performance, smooth and easy-cleaning surface, environmental protection and the like.

Description

Low-expansion microcrystalline glass tableware

Technical Field

The invention belongs to the technical field of glass tableware manufacturing, and particularly relates to low-expansion glass ceramic tableware.

Background

Glass is a transparent or translucent solid material that forms a continuous network structure when molten, and which gradually increases in viscosity and hardens without crystallization during cooling. The common glass is an amorphous non-crystalline solid material prepared by using quartz sand and soda ash as main raw materials, melting at a high temperature of 1500-1600 ℃, forming and rapidly cooling, wherein the content of silicon dioxide is 55-65%, and the common glass also contains 15% of sodium oxide and 10% of calcium oxide, and is characterized by hard and crisp texture, colorless transparency, low production cost and easy forming. Along with the improvement of the requirements of people on home decoration, the glass tableware gradually develops to the decoration industry, gradually enters the visual field of people and becomes a hot shopping product. The glass tableware is made of glass as basic material and has high hardness, stable chemical performance, smooth surface and environment friendship. The excellent forming manufacturability and surface decorative property of glass bring great changes along with the development of modern forming technical equipment, the dominating pattern of ceramic tableware in the tableware field can be gradually changed, and the demand of the tableware market on glass tableware is further increased.

Disclosure of Invention

The invention mainly solves the problem of providing a method for industrially producing crystal porcelain tableware by taking quartz sand as a main raw material, which comprises the following raw materials in parts by weight: 52-54% of quartz sand, 16-18% of sodium carbonate, 9% of calcite, 15% of aluminum hydroxide, 2% of sodium nitrate, 1% of barium carbonate, 1% of borax, 0.7% of sodium oxysilicate, 0.3% of anhydrous sodium sulphate, 0.9% of selenium powder and 0.1% of cobalt powder. The manufacturing method comprises the following steps:

(1) feeding quartz sand, sodium carbonate, calcite, aluminum hydroxide, sodium nitrate, barium carbonate, borax, sodium oxysilicate, anhydrous sodium sulphate, selenium powder and cobalt powder into a blender according to the formula ratio, uniformly blending, feeding the mixture into an electric melting continuous furnace through a conveyor, sealing, and then feeding electricity for heating to enable the temperature of the mixture to reach 1520-1560 ℃, keeping the temperature for 20-22 hours to enable the mixture to reach a molten state, thereby obtaining a soda-lime glass molten mass;

(2) feeding the soda-lime glass melt into a forming machine to prepare glass tableware with different sizes, naturally cooling the glass tableware to 600 ℃, hardening the glass tableware, feeding the hardened glass tableware into an annealing kiln by using a conveyor, and cooling the glass tableware from about 600 ℃ to about 450 ℃ in a first box of the annealing kiln for about 30 minutes; then sending the glass tableware into a second box of an annealing kiln for 60 minutes, reducing the temperature from about 450 ℃ to about 150 ℃, sending the glass tableware into the air after the annealing is finished, and naturally cooling the glass tableware in the air to the normal temperature;

(3) and (3) feeding the annealed glass tableware into a tempering box, heating the glass tableware to 660-680 ℃, stopping heating, immediately feeding cold air from all directions, rapidly cooling the glass tableware to normal temperature, finishing tempering, and taking the glass tableware out of the tempering box to obtain a finished product.

The invention provides a method for producing glass tableware in batches, which has a series of advantages of simple process, convenient raw material source, low production cost, no pollution, suitability for industrial production and the like; the product is a refined tableware, and has the advantages of fine workmanship, beautiful appearance, high hardness, stable chemical performance, smooth and easy-to-clean surface and the like.

Detailed Description

The invention will be further illustrated by the following examples

(1) Feeding quartz sand accounting for 52 percent of the total amount, sodium carbonate accounting for 18 percent of the total amount, calcite accounting for 9 percent of the total amount, aluminum hydroxide accounting for 15 percent of the total amount, sodium nitrate accounting for 2 percent of the total amount, barium carbonate accounting for 1 percent of the total amount, borax accounting for 1 percent of the total amount, sodium oxysilicate accounting for 0.7 percent of the total amount, anhydrous sodium sulphate accounting for 0.3 percent of the total amount, selenium powder accounting for 0.9 percent of the total amount and cobalt powder accounting for 0.1 percent of the total amount into a blender for blending uniformly, feeding the mixture into an electric melting furnace through a conveyor, sealing and then electrically heating to enable the temperature of the mixture to reach 1520 ℃, keeping the temperature for 22 hours to enable the mixture to reach a molten state to obtain a soda-lime glass molten body;

(2) feeding the soda-lime glass melt into a forming machine to prepare glass tableware with different sizes, naturally cooling the glass tableware to 600 ℃, hardening the glass tableware, feeding the hardened glass tableware into an annealing kiln by using a conveyor, and cooling the glass tableware from about 600 ℃ to about 450 ℃ in a first box of the annealing kiln for about 30 minutes; then sending the glass tableware into a second box of an annealing kiln for 60 minutes, reducing the temperature from about 450 ℃ to about 150 ℃, sending the glass tableware into the air after the annealing is finished, and naturally cooling the glass tableware in the air to the normal temperature;

(3) and (3) feeding the annealed glass tableware into a tempering box, heating the glass tableware to 660-680 ℃, stopping heating, immediately feeding cold air from all directions, rapidly cooling the glass tableware to normal temperature, finishing tempering, and taking the glass tableware out of the tempering box to obtain a finished product.

Claims (2)

1. The low-expansion glass ceramic tableware comprises the following raw materials in percentage by weight: comprises 52 to 54 percent of quartz sand, 16 to 18 percent of sodium carbonate, 9 percent of calcite, 15 percent of aluminum hydroxide, 2 percent of sodium nitrate, 1 percent of barium carbonate, 1 percent of borax, 0.7 percent of sodium oxysilicate, 0.3 percent of anhydrous sodium sulphate, 0.9 percent of selenium powder and 0.1 percent of cobalt powder; the method is characterized in that:

(1) the ground quartz sand, sodium carbonate, calcite, aluminum hydroxide, sodium nitrate, barium carbonate, borax, sodium oxysilicate, anhydrous sodium sulphate, selenium powder and cobalt powder with the formula amount are sent into a blender to be blended evenly, the mixture is sent into an electric melting continuous furnace through a conveyor to be sealed and then is electrically heated, the temperature of the mixture reaches 1520-1560 ℃, the temperature is kept for 20-22 hours, and the mixture reaches a molten state to obtain a soda-lime glass molten mass;

(2) feeding the soda-lime glass melt into a forming machine to prepare glass tableware with different sizes, naturally cooling the glass tableware to 600 ℃, hardening the glass tableware, feeding the hardened glass tableware into an annealing kiln by using a conveyor, and cooling the glass tableware from about 600 ℃ to about 450 ℃ in a first box of the annealing kiln for about 30 minutes; then sending the glass tableware into a second box of an annealing kiln for 60 minutes, reducing the temperature from about 450 ℃ to about 150 ℃, sending the glass tableware into the air after the annealing is finished, and naturally cooling the glass tableware in the air to the normal temperature;

(3) and (3) feeding the annealed glass tableware into a tempering box, heating the glass tableware to 660-680 ℃, stopping heating, immediately feeding cold air from all directions, rapidly cooling the glass tableware to normal temperature, finishing tempering, and taking the glass tableware out of the tempering box to obtain a finished product.

2. The tableware of claim 1, wherein the step (1) is characterized by: the melting temperature in the electric smelting continuous melting furnace is 1540 ℃, and the melting time is 21 hours.