Silica sand is a kind of silicate mineral with hard, wear-resistant, stable chemical properties. It is used in glass, casting, ceramics and refractories, metallurgy, construction, chemicals, plastics, rubber, abrasive and other industries.
How to get silica sand with high quality and high purity?
The process of the silica sand processing plant is crushing, grading, and washing for dust removal and impurity removal functions. For high purity silica sand, some high-purity extraction method such as flotation, magnetic separation, etc is required too.
Silica sand processing plant process and equipment：
1. Crushing process
In the entire stone crushing line, it will be a two or three-stage crushing process. A jaw crusher is used to crush the raw silica to a smaller size in the primary crushing stage. Then, the coarsely crushed silica is transferred by the belt conveyor to the secondary crusher for further crushing. The high-performance VSI sand-making machine adopts two kinds of crushing principles. The high-depth crushing cavity keeps large particles obtain sufficient crushing force. The entrance can control the fineness of the sand to meet the special requirements of the user for sand, which is far superior to natural sand. In the whole crushing process, the material is not directly contacting the metal parts but is affected by the friction and crushing of the lining, which reduces pollution and improves the quality of sand.
2. Screening process
The circular vibrating screen is equipped in the sand production line to screen out qualified sand. In the crushing plant, the silica lumps that are not broken enough are screened out by the vibrating screen and returned to crushing again. The silica sand that meets the particle size requirements will enter the subsequent process.
3. Washing process
Artificial sand contains a certain amount of stone powder and mud powder, and the violent collision during stone processing, a large amount of stone powder will seriously affect sand quality. Therefore, it is very necessary to wash the silica sand before being selected. The sand washing process is necessary for purifying impurities removing by cleaning the silica sand. With different washing methods, it has a wheel sand washing machine, screw sand washing machine, etc. The washing degree is very high. The sand particles cleaned by the sand washing machine are clean, pressure-resistant, corrosion-resistant, and of better quality.
4. another further process
After the sand washing process, to get high purity silica sand, a magnetic separator or flotation machine is needed too. A wet strong magnetic separator is often used to remove limonite, tourmaline, hematite, etc in the magnetic separation process. A flotation cell is used to separate mica using an anionic collector under acidic conditions. Generally, after washing, magnetic separation, or flotation, the purity of silica sand can reach more than 99%, which basically meets the needs of industrial sand.
According to different requirements, we could design and provide professional solutions and customize relative sand processing equipment, such as a VSI sand making machine, circular vibrating screen, sand washing machine, etc. If you want to know more details, welcome to contact us anytime.