阅读说明：本技术 一种无硫无碳着色玻璃的制备方法 (Preparation method of sulfur-free and carbon-free colored glass ) 是由 刘沐阳 陈小华 方云飞 张军 于 2020-05-25 设计创作，主要内容包括：本发明涉及玻璃生产工艺的无硫排放技术领域,具体涉及一种无硫无碳着色玻璃的制备方法,包括如下步骤：步骤(1)称取原料：硅砂、白云、长石、石灰石、纯碱、铁粉和碎玻璃；步骤(2)：将步骤(1)原料送入熔窑；经高温熔化、高温澄清,强制溶解、强制吸收,所得玻璃液通过节流闸板流入锡槽成型；步骤(3)将摊平拉薄的步骤(2)所得玻璃,进入退火窑退火后,经横切、掰断,装箱包装制成玻璃成品。本发明的有益效果在于：原料去掉了芒硝和碳粉,生产过程中没有硫及其硫化物的排放,减轻了环境污染。还提高了玻璃的透明性和白度,产品色调纯正,无黄色调；玻璃可见光总透过率可以提高到90％以上。(The invention relates to the technical field of sulfur-free emission of glass production technology, in particular to a preparation method of sulfur-free carbon-free colored glass, which comprises the following steps: weighing raw materials: silica sand, dolomite, feldspar, limestone, soda ash, iron powder and cullet; step (2): feeding the raw material in the step (1) into a melting furnace; after high-temperature melting, high-temperature clarification, forced dissolution and forced absorption, the obtained molten glass flows into a tin bath through a throttling flashboard for molding; and (3) annealing the spread and thinned glass obtained in the step (2) in an annealing kiln, and then performing transverse cutting, breaking off, boxing and packaging to obtain a finished glass product. The invention has the beneficial effects that: the raw materials are free from mirabilite and carbon powder, no sulfur and sulfide are discharged in the production process, and the environmental pollution is reduced. The transparency and whiteness of the glass are also improved, and the product has pure color tone and no yellow color tone; the total visible light transmittance of the glass can be improved to more than 90%.)

1. A method for preparing the sulfur-free and carbon-free colored glass is characterized by comprising the following steps:

step (1): weighing the following raw materials in parts by mass: 490-510 parts of silica sand, 140-145 parts of dolomite, 16-18 parts of feldspar, 28-31 parts of limestone, 175-167 parts of soda ash, 0.12-0.20 part of iron powder and 140-145 parts of cullet;

step (2): feeding the raw material in the step (1) into a melting furnace; after high-temperature melting, high-temperature clarification, forced dissolution and forced absorption, the obtained molten glass flows into a tin bath through a throttling flashboard for molding;

and (3) annealing the spread and thinned glass obtained in the step (2) in an annealing kiln, and then performing transverse cutting, breaking off, boxing and packaging to obtain a finished glass product.

2. The method for preparing the sulfur-free and carbon-free colored glass according to claim 1, wherein the step (1) comprises the following steps of weighing the raw materials in parts by weight: 499.5 parts of silica sand, 142.5 parts of dolomite, 16.8 parts of feldspar, 29.8 parts of limestone, 169.5 parts of soda ash, 0.18 part of iron powder and 141.7 parts of cullet.

3. The method of making a non-sulfur, non-carbon tinted glass according to claim 1 wherein the melting section of the melting furnace is fired at a pressure of: micro-positive pressure is 2.5Pa +/-1 Pa; pressure of the working part: 9-15 Pa.

4. The method of making a non-sulfur, non-carbon tinted glass according to claim 1 wherein the hot spot temperature of the furnace is: 1565-1600 ℃; clearing temperature: 1430-1475 ℃; temperature of the flow channel: 1060 to 1100 +/-1 ℃.

5. The method of claim 1, wherein the soda ash volatilization rate is 0.5.

Technical Field

The invention relates to the technical field of sulfur-free emission of glass production processes, in particular to a preparation method of sulfur-free carbon-free colored glass.

Background

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a method for removing mirabilite, eliminating sulfur dioxide emission and reducing environmental pollution. And the carbon powder is removed, the sulfur-carbon composite coloring is eliminated, and the glass quality is optimized, so that the transparency and the whiteness of the glass are improved.

The invention provides a preparation method of sulfur-free and carbon-free colored glass, which comprises the following steps:

step (1): weighing the following raw materials in parts by mass: 490-510 parts of silica sand, 140-145 parts of dolomite, 16-18 parts of feldspar, 28-31 parts of limestone, 175-167 parts of soda ash, 0.12-0.20 part of iron powder and 140-145 parts of cullet;

step (2): feeding the raw material in the step (1) into a melting furnace; after high-temperature melting, high-temperature clarification, forced dissolution and forced absorption, the obtained molten glass flows into a tin bath through a throttling flashboard for molding;

and (3) annealing the spread and thinned glass obtained in the step (2) in an annealing kiln, and then performing transverse cutting, breaking off, boxing and packaging to obtain a finished glass product.

Further, in the preparation method of the sulfur-free and carbon-free colored glass, the step (1) is to weigh the following raw materials in parts by mass: 499.5 parts of silica sand, 142.5 parts of dolomite, 16.8 parts of feldspar, 29.8 parts of limestone, 169.5 parts of soda ash, 0.18 part of iron powder and 141.7 parts of cullet.

Further, in the above method for producing a colored glass free of sulfur and carbon, the melting pressure in the melting section of the melting furnace is: micro-positive pressure is 2.5Pa +/-1 Pa; pressure of the working part: 9-15 Pa.

Further, in the above method for producing a colored glass free of sulfur and carbon, the hot spot temperature of the melting furnace is: 1565-1600 ℃; clearing temperature: 1430-1475 ℃; temperature of the flow channel: 1060 to 1100 +/-1 ℃.

Furthermore, in the preparation method of the sulfur-free and carbon-free colored glass, the volatilization rate of the calcined soda is 0.5.

The invention has the beneficial effects that:

1. in the preparation method of the sulfur-free and carbon-free colored glass, the mirabilite and the carbon powder are removed from the raw materials, and the emission of sulfur and sulfides thereof is avoided in the production process, so that the pollution to the environment is reduced, the environment is improved, and the environmental-friendly equipment and the capital investment are reduced. The emission of sulfur trioxide can be reduced by more than 360 tons each year by removing mirabilite. According to 31 days 12 months in 2019, the national float glass production capacity utilization rate is 69.30%, and after the technology is popularized and applied nationwide, the national float glass factory can reduce the emission of sulfur dioxide by 596050 tons at least after the technology is calculated by 93272 ten thousand weight boxes.

2. The invention creatively improves the transparency and whiteness of the glass, and the product has pure color tone and no yellow color tone; the total visible light transmittance of the glass can be improved to more than 90%.

3. The consumption of the mirabilite of the chemical product is reduced, a large amount of resources are saved for the society, and the waste is reduced. The year is more than 320 tons of mirabilite. After the technology is popularized and applied nationwide, the using amount of mirabilite can be reduced by 280430 tons at least in the float glass line nationwide.

4. The civil engineering and equipment investment in the batching link is reduced, and the civil engineering and equipment investment can be saved;

5. the process flow is simplified, and the probability of material error is greatly reduced.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.

The most key concept of the invention is as follows: the invention creatively removes mirabilite and carbon powder in the production and manufacture, and Fe is used for removing the mirabilite and the carbon powder²⁺/Fe³⁺And the oxidation-reduction control of the air excess coefficient and the accurate optimization of the technological parameters are carried out to obtain the high-quality electronic glass substrate with extremely low bubble rate.