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Super white glass can be so amazing

  • Author:fanyu
  • Source:chinamirrormanufacturer.com
  • Release on:2018-03-06
Ultra-white glass is a translucent low-iron glass, also known as low-iron glass, high-transparent glass, a glass family, "Crystal Prince," said. With a low blew rate, color consistency, high visible light transmittance, good permeability, low UV transmittance, is a high-quality, multi-functional new high-grade glass varieties. Mainly used in solar cells, solar thermoelectric mirrors, high-end architectural decoration electronic products, high-end sedan glass and other industries.
flat glass
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As the basic product of the solar energy industry, ultra-white glass requires direct sunlight transmittance of more than 3% (equivalent to 3mm standard thickness), while ordinary float glass generally has a light transmittance of 86%. To achieve this goal, the content of colored oxidant Fe2O3 must be controlled below 150ppm. It can be said that the production process of ultra-white glass is the process of controlling Fe2O3 content.
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The company is located in:Reasonable choice of raw materials
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Because iron oxide not only affects the glass color transmittance of glass, but also because of iron oxide has strong absorption of thermal radiation most of the radiant heat absorbed by the surface glass liquid glass liquid upper and lower layer of significant temperature Gradient results in convection of molten glass within the furnace, increasing the difficulty of melting and clarifying. In order to effectively reduce the iron content of glass, we should start from the raw materials, the effective selection of raw materials containing Fe2O3 is a prerequisite for the production of ultra-white glass.
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Ultra-white glass raw materials are dolomite, limestone, feldspar, silica sand. Such as magnesium oxide can effectively control the glass liquid hardening rate and crystallization performance, mainly the physical properties of high temperature glass, while improving the melting of glass play a role in melting. Dolomite is the main raw material for the introduction of magnesium oxide. Limestone is another important mineral raw material. Currently lime glass Fe2O3 content of 50ppm or less for the supply of ultra-white glass.
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Among the many raw materials, SiO2 is the main body that forms the skeleton of the glass. The SiO2 siliceous material introduced is the main and larger amount of raw materials used in glass production. It is also the first solution and control of ultra-white glass production.
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There are two main sources. One is the quality of quartzite its own grade to meet the requirements of low-iron glass production in the process to minimize the incorporation of iron. You can use the traditional stone grind, only a few areas such as Anhui Feng Yang. The other is the ordinary flat glass with high-quality silica sand flotation beneficiation treatment to meet the requirements of this relatively high cost of sand, is more than 2 times the above natural high-quality quartzite. At present, these two methods can control the content of Fe2O3 to 100ppm or less. The iron introduced by silica sand can be controlled below 73ppm.
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The company is located in:Opportunities for development brought by industrial policy guidance
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Building energy saving is a comprehensive systematic project, and using scientifically and reasonably processed glass with energy conservation, safety and environmental protection features is an extremely important part of this systematic project.
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In recent years, relevant favorable policies have been promulgated one after another. For instance, Guoshangfa [2016] No. 34 Document Guiding Opinions on Promoting Steady Growth of Building Materials Industry and Adjusting Structure and Increasing Benefit clearly states: Encourage the integration of resources such as tailings and waste rock for silica sand, quartz sand and gravel aggregate , To enhance the level of comprehensive utilization; building materials industry development plan (2016-2020) clearly states: to vigorously develop ultra-white glass and quartz glass products, refractory materials and building sanitary ceramics and other industries; Ministry of Industry [2016] No. 344 document Technology Innovation Capacity Development Plan (2016-2020) "made it clear that we should focus on the development of flat glass, building and sanitary ceramics and refractory materials such as building materials industry. The introduction of a good policy will undoubtedly create a favorable policy environment for the development of the glass industry and quartz sand industry and provide an opportunity for its development.