facebook twitter LinkedIn

Sand washing plant for iron removal from silica sand

Recently, the sinonine technical team has invented a sand washing plant of removing iron from quartz sand through continuous exploration. Conventional methods of removing iron from silica sand are magnetic mineral processing and dilute hydrochloric acid washing. This method can not remove iron ions from quartz sand crystals, and can not achieve satisfactory effect of removing iron.
The iron in quartz sand mainly exists in the form of Fe2 + and Fe3 + ions between the crystal surface and the crystal cracks. Under the protection of surface tension of water, the general pickling method can only remove part of the surface iron ions, and the acid solution can not reach the cracks.

The new method removes iron ions through the following steps.
The washed quartz sand is dried to remove water, and then added with concentrated hydrochloric acid. The agrohydrochloric acid enters into the cracks between the quartz sand crystals. Concentrated hydrochloric acid dissolves iron ions first, and then produces ferrous chloride and ferric trichloride to volatilize.
In actual production, after 24 hours or 48 hours of mixing dry sand with concentrated hydrochloric acid, clean water is used to remove non-volatile ferric chloride, aluminium chloride, calcium chloride and magnesium chloride, and high purity silica sand (quartz crystal) is obtained. 

The method can reduce the iron content of yellow quartz sand from 1.2% to less than 0.02%, and achieve the purpose of iron removal. Quartz sand after iron removal can be used to manufacture high-grade glass, optical glass, instrument glass, medicinal glass, high-grade ceramic glaze, frit, etc. It can reduce production costs and is very practical in areas without high-quality quartz sand raw materials.

Suggestions: Before quartz sand production, quartz sand raw materials should be fully identified, the physical and chemical properties of raw materials should be analyzed, and then small-scale tests should be carried out to determine a reasonable sand processing scheme, according to market conditions, to produce the most suitable products.

Lasted news & technology

The flotation method provided by Sinonine can effectively remove feldspar in quartz sand, which is widely used in quartz sand washing plant and has achieved good results.


Sinonine high purity silica sand washing plant can work 7x24 hours to Meet the needs of customers in large production. www.9silica.com, +8618118821087


Raw sand go into silica sand washing plant to become high purity sand.


High-purity quartz powder has excellent optical, thermal, chemical stability and radiation resistance, so it has a wide range of applications in electronic industry, optical communications, military and other fields. With the development of electronic industry, optical communication, laser, optics a


sand washing plant for high purity sand


After drying by fluidized bed dryer system, the moisture content of silica sand can be less than 0.5%, and the moisture distribution is very uniform.


Most of the hydraulic graders in sand washing plants adopt the automatic control system, which has achieved good results.


The processing technology of high purity quartz sand washing plant usually includes complex processes such as calcination, water quenching, classification, magnetic separation, flotation, acid leaching, cleaning and chlorination roasting.

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.