Ultra clear glass quartz sand raw material grain composition suitable for float production

Abstract

The invention discloses a ultra clear glass quartz sand raw material grain composition suitable for float production. The ultra clear glass quartz sand raw material grain composition is prepared fromthe following components in percentage by weight: 0-4% of quartz sand raw material grain with the grain size being larger than 500 and less than 700 microns, 15-35% of quartz sand raw material grain with the grain size being larger than 300 and less than 500 microns, 30 to 50% of quartz sand raw material grain with the grain size being larger than 212 and less than 300 microns, 10 to 30% of quartzsand raw material grain with the grain size being larger than 106 and less than 212 microns, and o to 3% quartz sand raw material grain with the grain size being less than 106 microns. The quartz sand grain composition can achieve granularity evenness of quartz sand, and can be easily mixed evenly with other batches. A good combination means is provided for energy conservation and clear quality of the ultra clear glass produced through the float method.

Description

technical field [0001] The invention belongs to the technical field of glass manufacturing, and relates to a particle gradation of quartz sand raw material for producing ultra-clear glass by a float method. Background technique [0002] Ultra-clear glass has superior optical properties and is widely used in solar power generation, photothermal power generation, information display, architectural decoration, smart agriculture, etc. The production of ultra-clear glass by the float process has the advantages of large output, good glass quality, large plate width, and low price. However, due to the low iron content in the glass, the thermal conductivity is 3-4 times that of ordinary glass, making the vertical direction of the glass liquid The small temperature gradient requires more heat to heat and melt the molten glass. At the same time, due to the small temperature difference between the upper and lower sides in the vertical direction, the convection of the glass is weakened,...

AI Technical Summary

Problems solved by technology

In the production of float ultra-clear glass, due to the difficulty of melting and clarifying ultra-clear glass, many enterprises limit the upper limit of the particle size of quartz sand to +710um, that is, +710um≤0, but the distribution within the particle size segment has no effect. To carry out the requirements, it is only considered that too many large particles in the particle size of the quartz sand will cause high melting temperature and long melting time, but too many fine particles are easy to agglomerate to form large particles, which also affects melting and brings in too much gas. The clarification of ultra-clear glass, and the mismatch of particle size will affect the uniformity of batch materials, which will have an adverse effect on melting and clarification. Therefore, it is necessary to improve the particle size distribution of quartz sand to meet the balance between glass melting and clarification. Conducive to energy saving and improved glass quality