facebook twitter LinkedIn

Ultra white glass and glass silica sand

Ultra white glass is a kind of ultra transparent glass, also known as low iron glass, colorless glass, high transparent glass, etc. the iron content in the glass composition is not more than 150ppm, and the light transmittance can reach more than 92%. As a new material, ultra white glass has broad application prospects in solar photovoltaic industry, high-end cars, high-end buildings, high-end horticultural buildings and high-end furniture.
Kinds of ultra white glass
white galss
1.Ultra white calendered glass
The ultra white glass produced by calendering process can be divided into solar ultra white calendered glass (solar substrate glass) and ultra white transparent flat glass.
Ultra white calendered glass has the characteristics of high solar transmittance, low absorptivity, high reflectivity, high strength, resistance to solar ultraviolet radiation without decreasing the transmittance.
2.Ultra white float glass
Ultra white glass produced by float process is a new type of high-quality and multi-functional high-grade glass with the characteristics of crystal clear, high-grade and elegant.
The transparency, light transmittance, strength, flatness and self explosion rate of ultra white float glass are better than those of ordinary glass. In addition, it can also be used to make thin film battery, which is lower than polysilicon battery cost, and also suitable for building exterior wall.
Material of Ultra white glass
In order to meet the requirements of ultra white glass, the composition of ultra white glass is strictly regulated in industry.
Table 1: chemical requirement of ultra white glass
Chemical SiO2 Al2O3 Fe2O3 CaO MgO R2O
Content % 71.0-73.0 0.1-2.0 0.01-0.015 8.0-10.0 1.5-5.0 13.0-15.0
The raw materials of ultra white glass mainly include silica sand, feldspar, dolomite, limestone, heavy alkali, aluminum hydroxide, mirabilite, sodium pyroantimonate and Antimony trioxide, which require strict requirements for the percentage of various contents of raw materials.
Tabe2. Raw material composition requirements(Wt%)
Raw material SiO2 Al2O3 Fe2O3 CaO   MgO Na2CO3 TiO2 NaCl
Silica sand >98.5 <1.0 <0.01         <0.1  
Feldspar <70 >15 <0.15            
Dolomite     <0.015 >30   >20      
Limestone       >52          
Alkali     <0.018       >99   <0.3
Aluminium Hydroxide   >63.5 <0.001            
Mirabilite   Na2SO4>99±0.1, Fe2O3<0.001
Sodium pyroantimonate   Sb2o5>64, Fe2O3<0.055
Antimony oxide   Sb2o3>99.5%
Requirements of raw material silica sand for ultra white glass
Quartz raw materials include natural quartz sand, quartz sandstone, quartzite and vein quartz, in which the content of SiO2 is generally more than 98.5%. Generally, ordinary quartz sand needs to be treated by sand washing plant before it can reach the qualified quartz sand for glass.
glass sand
Glass sand iron content
In the production process, when the iron content exceeds a certain range, it will not only greatly reduce the light transmission performance, but also absorb the thermal radiation generated by the iron oxide in the quartz sand melting process, resulting in obvious temperature gradient between the upper and lower layers of the liquid glass, which makes the convection of the liquid glass difficult, and greatly increases the difficulty of melting and clarification. Therefore, the iron content of silica sand should be considered in the design of main raw materials.
The requirements for iron content of quartz sand for ultra white glass are generally as Fe2O3≤0.015 ,Fe≤0.008.
Glass silica sand size
Size(mm) >0.5 0.113-0.55 <0.113
Content (%) <0.5 >94.5 <5

For more information about ultra white glass sand and sand washing plant, please visit , or contact us directly by +86-18118821087 (whatsapp).

Lasted news & technology

In this paper, the processing of photovoltaic glass ultra silica sand is introduced in detail. The Fe2O3 in silica sand is reduced to less than 90ppm by flotation with common quartz sand as raw material to meet the quality requirements of ph


The most direct index to measure the purity of high purity quartz sand is the content of alkali metals, key transition elements, aluminum and boron in raw materials.


How to reasonably design the water circuit and how to reuse the water produced in each section of the sand washing plant after treatment are very important issues.


Fracturing sand washing plant is generally divided into five stages, namely sand mining stage, sand pre screening stage, sand washing classification stage, fine sand drying stage and finished product screening and packaging stage.


This article describes a sand washing plant for low expansion foundry sand.


The sinonine team has invented sand washing plant of removing iron from quartz sand through continuous exploration.


The season of continuous spring rain will still have a serious impact on the production of quartz sand.


In the sand washing plant, if we want to produce high-purity quartz sand, we need to choose the right raw materials, so how to determine the raw materials of high-purity quartz sand?

Contact us

Thank you for your interests in Sinonine, Please feel free to submit your inquiry information to us, our expert will contact with you as soon as possible.