阅读说明：本技术 一种超白超厚浮法玻璃及其制备方法 (Ultra-white and ultra-thick float glass and preparation method thereof ) 是由 陈鹏 孙希亭 吴坤 臧德水 郑良金 于 2021-10-28 设计创作，主要内容包括：本发明公开了一种超白超厚浮法玻璃及其制备方法,涉及浮法工艺制备超厚玻璃技术领域。本发明包括以下重量份的原料：硅砂300～350份、氢氧化铝5-10份、白云石60-70份、石灰石35-40份、纯碱100-110份、芒硝1-2份、碎玻璃110-120份、着色剂0.03-0.07份；以解决在利用浮法制备超白玻璃19mm及以上厚度时,成品质量难以达到普通厚度玻璃的问题。(The invention discloses ultra-white and ultra-thick float glass and a preparation method thereof, and relates to the technical field of ultra-thick glass preparation by a float process. The invention comprises the following raw materials in parts by weight: 300-350 parts of silica sand, 5-10 parts of aluminum hydroxide, 60-70 parts of dolomite, 35-40 parts of limestone, 110 parts of soda ash, 1-2 parts of mirabilite, 120 parts of broken glass and 0.03-0.07 part of a coloring agent; the method solves the problem that the quality of finished products is difficult to reach the glass with the common thickness when the ultra-white glass with the thickness of 19mm or more is prepared by a float method.)

1. A preparation method of ultra-white and ultra-thick float glass is characterized by comprising the following steps: preparing by adopting a float method:

arranging at least 13 pairs of edge rollers in a tin bath in the forming process, arranging a group of middle temperature area water bags, grouping the angles of the edge rollers, setting the angle of the front 10 pairs of the edge rollers to be 10-20 degrees, and setting the angle of the edge rollers to be within a range of not more than 3 degrees from the 10 th pair of the edge rollers;

the total length of the annealing kiln is not less than 140 meters, and a wind shield is arranged in an F area of the annealing kiln;

the process of firstly spreading to be thin, then thickening and then spreading to be thin is adopted.

2. The method of manufacturing ultra-white and ultra-thick float glass according to claim 1, wherein: the distance between the edge rollers is 1.8 m.

3. A method of manufacturing ultra-white and ultra-thick float glass according to claim 1 or 2, wherein: and 5 groups of side fire guns of the annealing kiln are arranged.

4. The method of manufacturing ultra-white and ultra-thick float glass according to claim 1, wherein: the electric heating of the edge part of the high-temperature area of the tin bath is 10-50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 10-40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 10-40 kilowatts more than that of the middle part.

5. The method of manufacturing ultra-white and ultra-thick float glass according to claim 4, wherein: the electric heating of the edge part of the high-temperature area of the tin bath is 50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 40 kilowatts more than that of the middle part.

6. The method of manufacturing ultra-white and ultra-thick float glass according to claim 1, wherein: the preparation method is characterized by comprising the following steps of: 300-350 parts of silica sand, 5-10 parts of aluminum hydroxide, 60-70 parts of dolomite, 35-40 parts of limestone, 110 parts of soda ash, 1-2 parts of mirabilite, 120 parts of broken glass and 0.03-0.07 part of a coloring agent.

7. The method of manufacturing ultra-white and ultra-thick float glass according to claim 6, wherein: comprises 345 parts of silica sand, 5 parts of aluminum hydroxide, 68 parts of dolomite, 37 parts of limestone, 102 parts of soda ash, 1.8 parts of mirabilite, 115 parts of cullet and 0.03-0.07 part of colorant.

Technical Field

The invention relates to the technical field of preparation of super-thick glass by a float process, in particular to super-white super-thick float glass and a preparation method thereof.

Background

The ultra-white glass is ultra-transparent low-iron glass, also called low-iron glass and high-transparency glass. It is a high-quality, multifunctional, novel and high-grade glass, its light transmittance is generally above 91%, and it has the characteristics of crystal clearness, nobility and elegance, and is called "crystal prince" of glass family.

The ultra-white glass can be used in the fields of interior and exterior decoration of high-grade buildings, product showcases, household appliances, high-grade furniture, bathroom supplies, various lamp decorations, high-grade artware, solar products and the like. The ultra-white and ultra-thick glass product has more special application and is a product with high added value.

The production process of ultra-white float glass mainly includes PPG production technology, and its adopted colouring agent mainly includes ferric oxide, cobalt oxide and copper oxide, etc. said method has high requirements for production process.

The forming principle of float glass is that high-temp. molten glass is continuously flowed into metallic tin liquid surface under the condition of controlling molten glass flow rate, and under the combined action of gravity, surface tension, buoyancy of molten tin and drawing force the molten glass can be formed into glass band with a certain balance thickness, and the glass band can be gradually cooled and solidified in the course of running process, and finally can be drawn out from outlet end of tin bath, and then fed into annealing furnace, and said balance thickness is about 6 mm. In the production of thick glass with a thickness greater than the equilibrium thickness, usually a reverse-assisted direct drawing method or a retaining wall method is adopted, and in the production method of float glass with a thickness of 19mm or more, the finished product with the same performance as the finished product with the equilibrium thickness is difficult to obtain in most cases.

Disclosure of Invention

The invention aims to provide ultra-white and ultra-thick float glass and a preparation method thereof, and aims to solve the problem that the quality of a finished product cannot reach the quality of glass with the common thickness when the ultra-white glass with the thickness of 19mm or more is prepared by a float process.

In order to solve the problems, the invention adopts the following technical means:

the super-white and super-thick float glass comprises the following raw materials in parts by weight: 300-350 parts of silica sand, 5-10 parts of aluminum hydroxide, 60-70 parts of dolomite, 35-40 parts of limestone, 110 parts of soda ash, 1-2 parts of mirabilite, 120 parts of broken glass and 0.03-0.07 part of a coloring agent.

Preferably, the coating comprises 345 parts of silica sand, 5 parts of aluminum hydroxide, 68 parts of dolomite, 37 parts of limestone, 102 parts of soda ash, 1.8 parts of mirabilite, 115 parts of cullet and 0.03-0.07 part of a coloring agent.

Moreover, a production process of the ultra-white and ultra-thick float glass adopts the float process;

arranging at least 13 pairs of edge rollers in a tin bath in the forming process, arranging a group of middle temperature area water bags, grouping the angles of the edge rollers, setting the angle of the front 10 pairs of the edge rollers to be 10-20 degrees, and setting the angle of the edge rollers to be within a range of not more than 3 degrees from the 10 th pair of the edge rollers;

the total length of the annealing kiln is not less than 140 meters, and a wind shield is arranged in an F area of the annealing kiln;

the process of firstly spreading to be thin, then thickening and then spreading to be thin is adopted.

Further, the distance between the edge rollers is 1.8 m.

Furthermore, 5 groups of side fire guns are arranged on the annealing kiln.

Furthermore, the electric heating of the edge part of the high-temperature area of the tin bath is 10-50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 10-40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 10-40 kilowatts more than that of the middle part.

Furthermore, the electric heating of the edge part of the high-temperature area of the tin bath is 50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 40 kilowatts more than that of the middle part.

The super-white and super-thick glass prepared by the invention has the following beneficial effects:

the produced ultra-white glass has low iron content and good light transmittance. In addition, the ultra-white and ultra-thick float glass prepared by the preparation method has good flatness, uniform surface thickness, thickness difference controlled within plus or minus 0.3mm, and yield up to 90%.

Meanwhile, the energy consumption of the ultra-white and ultra-thick glass produced by the method is 10 percent less than that of the equivalent ultra-white float glass melting furnace.

Meanwhile, the discharge index of the ultra-white and ultra-thick float glass in the production process also reaches the ultra-low discharge level.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings.

Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Example 1

The super-white and super-thick float glass comprises the following raw materials in parts by weight: 300 parts of silica sand, 5 parts of aluminum hydroxide, 60 parts of dolomite, 35 parts of limestone, 100 parts of soda ash, 1 part of mirabilite, 110 parts of cullet and 0.0403 parts of a coloring agent.

The colorant adopts cerium carbonate, copper oxide and cobalt oxide, wherein the cerium carbonate is 0.04 part, the copper oxide is 0.0002 part and the cobalt oxide is 0.0001 part.

Meanwhile, the following process is adopted for preparation;

a production process of ultra-white and ultra-thick float glass adopts a float process;

arranging at least 13 pairs of edge rollers in a tin bath in the forming process, specifically setting 13 pairs, arranging a group of middle temperature area water bags, grouping the angles of the edge rollers, setting the angle of the first 10 pairs of the edge rollers to be 10-20 degrees, and setting the angle of the edge rollers to be within a range of not more than 3 degrees from the 10 th pair of the edge rollers;

the total length of the annealing kiln is not less than 140 meters, specifically 144 meters is directly set, and a wind shield is arranged in an F area of the annealing kiln;

the process of firstly spreading to be thin, then thickening and then spreading to be thin is adopted.

Meanwhile, the distance between the edge rollers is 1.8 m.

And 5 groups of side fire guns of the annealing kiln are arranged.

Furthermore, the electric heating of the edge part of the high-temperature area of the tin bath is 50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 40 kilowatts more than that of the middle part.

Meanwhile, in the preparation process, all the iron removers adopt permanent magnet electric iron removers;

all raw material discharging chutes and bins are all made of ultra-white special polyethylene wear-resistant lining plates;

all the belt rollers and the belt carrier rollers are coated with rubber layers;

the shovel arm of the mixer is protected by a polyethylene sheath.

Example 2

The super-white and super-thick float glass comprises the following raw materials in parts by weight: 345 parts of silica sand, 5 parts of aluminum hydroxide, 68 parts of dolomite, 37 parts of limestone, 102 parts of soda ash, 1.8 parts of mirabilite, 115 parts of cullet and 0.04559 parts of a coloring agent.

The colorant adopts cerium carbonate, copper oxide and cobalt oxide, wherein the cerium carbonate is 0.045 parts, the copper oxide is 0.00035 parts and the cobalt oxide is 0.00024 parts.

Meanwhile, the following process is adopted for preparation;

a production process of ultra-white and ultra-thick float glass adopts a float process;

arranging at least 13 pairs of edge rollers in a tin bath in the forming process, specifically setting 13 pairs, arranging a group of middle temperature area water bags, grouping the angles of the edge rollers, setting the angle of the first 10 pairs of the edge rollers to be 10-20 degrees, and setting the angle of the edge rollers to be within a range of not more than 3 degrees from the 10 th pair of the edge rollers;

the total length of the annealing kiln is not less than 140 meters, specifically 144 meters is directly set, and a wind shield is arranged in an F area of the annealing kiln;

the process of firstly spreading to be thin, then thickening and then spreading to be thin is adopted.

Meanwhile, the distance between the edge rollers is 1.8 m.

And 5 groups of side fire guns of the annealing kiln are arranged.

Furthermore, the electric heating of the edge part of the high-temperature area of the tin bath is 50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 40 kilowatts more than that of the middle part.

Meanwhile, in the preparation process, all the iron removers adopt permanent magnet electric iron removers;

all raw material discharging chutes and bins are all made of ultra-white special polyethylene wear-resistant lining plates;

all the belt rollers and the belt carrier rollers are coated with rubber layers;

the shovel arm of the mixer is protected by a polyethylene sheath.

Example 3

The super-white and super-thick float glass comprises the following raw materials in parts by weight: 350 parts of silica sand, 10 parts of aluminum hydroxide, 70 parts of dolomite, 40 parts of limestone, 110 parts of soda ash, 2 parts of mirabilite, 120 parts of cullet and 0.0609 parts of a coloring agent.

The colorant adopts cerium carbonate, copper oxide and cobalt oxide, wherein the cerium carbonate is 0.06 part, the copper oxide is 0.0005 part and the cobalt oxide is 0.0004 part.

Meanwhile, the following process is adopted for preparation;

a production process of ultra-white and ultra-thick float glass adopts a float process;

arranging at least 13 pairs of edge rollers in a tin bath in the forming process, specifically setting 13 pairs, arranging a group of middle temperature area water bags, grouping the angles of the edge rollers, setting the angle of the first 10 pairs of the edge rollers to be 10-20 degrees, and setting the angle of the edge rollers to be within a range of not more than 3 degrees from the 10 th pair of the edge rollers;

the total length of the annealing kiln is not less than 140 meters, specifically 144 meters is directly set, and a wind shield is arranged in an F area of the annealing kiln;

the process of firstly spreading to be thin, then thickening and then spreading to be thin is adopted.

Meanwhile, the distance between the edge rollers is 1.8 m.

And 5 groups of side fire guns of the annealing kiln are arranged.

Furthermore, the electric heating of the edge part of the high-temperature area of the tin bath is 50 kilowatts more than that of the secondary edge part, the electric heating of the secondary edge part is 40 kilowatts more than that of the middle part, and the electric heating of the edge part of the outlet of the tin bath is 40 kilowatts more than that of the middle part.

Meanwhile, in the preparation process, all the iron removers adopt permanent magnet electric iron removers;

all raw material discharging chutes and bins are all made of ultra-white special polyethylene wear-resistant lining plates;

all the belt rollers and the belt carrier rollers are coated with rubber layers;

the shovel arm of the mixer is protected by a polyethylene sheath.

In the foregoing embodiment of the present invention, the embodiment with the most optimized effect is embodiment 2, and specifically, for embodiment 2, due to the selection of the special colorant, the blue effect of the edge portion of the large glass is effectively improved, and the light transmittance of the glass is effectively improved. Meanwhile, the iron content of the product is effectively controlled, and the problems of yellowing and greening of glass are solved. In addition, the ultra-white and ultra-thick float glass prepared by the preparation method has good flatness, uniform surface thickness, thickness difference controlled within plus or minus 0.3mm, and yield up to 90%.

Meanwhile, the energy consumption of the ultra-white and ultra-thick glass produced by the method is 10 percent less than that of the equivalent ultra-white float glass melting furnace.

Meanwhile, the discharge index of the ultra-white and ultra-thick float glass in the production process also reaches the ultra-low discharge level.

Comparative example 1

In this comparative example, the same formulation as in example 3 was used for preparation, and the used polyethylene abrasion resistant inch board, rubber layer, and polyethylene sheath were removed throughout the preparation, and in this comparative example, the edge roller was set to a range of less than 10 degrees.

Comparative example 2

In this comparative example, the same formulation as in example 3 was used for preparation, and the used polyethylene abrasion resistant inch board, rubber layer, and polyethylene sheath were removed throughout the preparation, and in this comparative example, the edge roller was set to a range of more than 20 degrees.

The products of comparative example 1, comparative example 2 and example 3 were compared, and the products of comparative example 1 and comparative example 2 had significant yellowing and greenness problems. And when the super-thick glass with the thickness of more than 19mm is prepared, the thicknesses of the finished products of comparative examples 1 and 2 are obviously uneven, and the thickness difference reaches 2 mm.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.