Introduction to silica purification process

According to the impurities of the silica mineral raw materials and the occurrence state of the inclusions, the beneficiation and purification process mainly includes the scrubbing-magnetic separation-flotation-acid leaching process. And with the deepening of the research of mineral processing technology, China has introduced processes such as electric separation and biological beneficiation.

Scrubbing is a beneficiation method for removing thin film iron , bonding and muddy impurity minerals on the surface of quartz sand by means of mechanical force and grinding and stripping force between sand grains, which can further smash un-monomer mineral aggregates, and then perform classification work. Mud-like impurity minerals are effectively removed. This process is generally used as a pretreatment process prior to the selection of silica mineral raw materials. At present, there are mainly mechanical scrubbing, rod scrubbing and dosing, high-efficiency strong scrubbing and ultrasonic scrubbing.

Magnetic separation, can maximize remove particles comprising the living body including magnetic minerals, such as mineral impurities hematite, limonite, biotite, titanium, pyrite and garnet, etc., also can be removed with a magnetic Particles of mineral inclusions. Generally, silica magnetic separation includes wet and dry magnetic separation.

When there are many impurity minerals in the silica, the silica can not be purified into high-purity quartz by scrubbing, deliming and magnetic separation. In order to further improve the purity of the silica and reduce the impurity content, the flotation method is usually adopted. Flotation is to remove non-magnetic associated impurity minerals such as feldspar and mica in silica mineral raw materials.

After the ore is separated by magnetic separation and flotation, the purity of SiO2 has reached 99.93%. However, the high-purity or ultra-high-purity silica has a SiO2 content of more than 99.99%, and the iron content is less than a few ppm, which requires acid leaching. Acid leaching is the use of quartz insoluble in acid (except HF), other impurity minerals can be dissolved by acid, so that further purification and purification of silica can be achieved.

At present, the research on the beneficiation and purification process of silica minerals in China has made great progress. At the same time, these beneficiation and purification processes have a good application prospect, which also lays a good foundation for the deep processing of silica in China.

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Pyrolysis Plant is used for recycling waste tire, waste plastic, waste rubber to fuel oil. According to the actual situation in every country and district, we developed different models of Batch Pyrolysis Plants for waste tires, rubber and plastic with daily capacity 5 -10 tons.

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Technical Parameter of Batch Waste Tyre Pyrolysis Plant

Waste Plastic Pyrolysis Plant

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