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Preparation method of borosilicate float glass batch

A technology of float glass and borosilicate, which is applied in the field of preparation of borosilicate float glass batch materials, can solve the problem of delaying the formation time of borosilicate, unfavorable rapid glass formation, large particle size difference, etc. problems, to achieve the effect of improving quality and uniformity, preventing phase separation, and small particle size

Active Publication Date: 2013-11-13
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the raw materials used in the manufacture of float glass are to weigh and mix the powdery raw materials of various particle sizes according to the required ratio, and then put them into the melting furnace in the form of powder for melting. This method has the following disadvantages: ⑴Due to the large difference in particle size of the powder, the maximum can reach 2.5mm, and the minimum is only 0.1mm, it is easy to delaminate during transportation and storage, which affects the uniformity of the glass; ⑵Because the particle size of various raw materials varies greatly, it is not conducive to The proximity of the ingredients delays the formation of borosilicate; (3) Since it is a powder batch, its density ranges from 1.3 to 1.5g / cm 3 , the compactness is small, after entering the melting furnace, the conduction of heat in it is weak, which is not conducive to the rapid formation of glass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The borosilicate float glass formula is the following components by weight: 160 parts of silica sand, 9 parts of alumina, 6 parts of limestone, 38 parts of boric acid, 2 parts of potassium carbonate, and 16 parts of sodium carbonate.

[0021] The above-mentioned various components are screened separately, and the powder with a particle size of 0.3mm or less is selected. Weigh the powder of each component according to its component formula, then put the powder of various components into a ball mill, and grind for 10 hours to become a dry material with a particle size of 0.05mm; The raw material is released, and transported to the mixer, and sprayed with mist hot water at a temperature of 40-60 °C. This process adopts the method of spraying hot water while mixing, so that hot water is evenly added to the dry material, making it Become a wet material with a water content of 8wt%; send the wet material to a pelletizing machine to prepare pellets with a particle size of 12mm...

Embodiment 2

[0023] The borosilicate float glass formula is the following components by weight: 165 parts of silica sand, 9 parts of alumina, 6 parts of limestone, 35 parts of boric acid, 2 parts of potassium carbonate, and 16 parts of sodium carbonate.

[0024] The above-mentioned components are sieved, and the powder with a particle size of 0.3mm or less is selected. Weigh various raw materials according to their component formulas, then put the powders of various components into a ball mill, and grind for 8 hours to become a dry material with a particle size of 0.1 mm; release the uniformly mixed dry material ground by the ball mill, and transported to the mixer; 0.5% of the dry weight of methyl cellulose was pre-dissolved in water at a temperature of 80°C, and sprayed evenly into the mixer. This process adopts the method of spraying while mixing, so that Spray the binder aqueous solution into the dry material evenly to make a wet material with a water content of 7wt%; send the above we...

Embodiment 3

[0026] The borosilicate float glass formula is the following components by weight: 156 parts of silica sand, 9 parts of alumina, 6 parts of limestone, 40 parts of boric acid, 2 parts of potassium carbonate, and 16 parts of sodium carbonate.

[0027] The above-mentioned components are sieved, and the powder with a particle size of 0.3mm or less is selected. Weigh various raw materials according to their component formulas, then put the powders of various components into a ball mill, and grind for 5 hours to become a dry material with a particle size of 0.2 mm; release the uniformly mixed dry material ground by the ball mill, and transported to the mixer; 0.3% of the dry weight of methyl cellulose was pre-dissolved in water at a temperature of 100°C, and sprayed evenly into the mixer. This process adopts the method of spraying while mixing, so that The binder is evenly added to the dry material to make a wet material with a water content of 6wt%; the above wet material is sent t...

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Abstract

The invention relates to a preparation method of borosilicate float glass batch, which comprises the following steps of: mixing and grinding powder materials with particle sizes of less than 0.3mm weighed according to technological requirements into dry materials with particle sizes of 0.05-0.2mm; discharging the obtained dry materials; conveying to a mixer for mixing; uniformly spraying mist-shaped hot water of 40-60 degrees centigrade while mixing to obtain wet materials with 3-8% of water in percentage by weight; conveying the obtained wet materials to a ball forming machine for preparing material balls with diameters of 5-30mm; and drying the obtained material balls at 200-260 degrees centigrade until water content is less than 0.1% to obtain the borosilicate float glass batch. The dry materials obtained by the invention have small material particle sizes and good uniformity; the components are fully close to each other, so that the formed material balls have high density; heat conduction speed in the melting furnace is fast, so that heat efficiency is improved, the borosilicate is promoted to be formed and the boron volatilization is reduced; therefore, the glass can be quickly formed, the phase splitting of the borosilicate glass is effectively inhibited and quality and uniformity of the glass are improved.

Description

technical field [0001] The invention relates to a method for preparing borosilicate float glass batch materials. technical background [0002] Borosilicate glass has a low coefficient of thermal expansion, and its heat resistance, chemical stability and electrical insulation performance are excellent. The borosilicate flat glass prepared by the float process can be widely used in the fields of construction, display and solar cells, and has broad application prospects. [0003] In the composition of borosilicate glass, due to the characteristics of boron-containing raw materials and the characteristics of boron element, it is easy to volatilize boron when heated, which leads to the problem of uneven composition in the glass components, which makes the glass produce Inhomogeneous structural defects such as phase separation and peeling. When borosilicate glass is heated and melted, the volatilization of boron is generally about 10% to 20%. When boron atoms enter the glass net...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B1/00
Inventor 何峰程金树李诗文刘楷王文田周宇
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE