Iron removal from silica sand is an important process in silica sand production. The iron content in silica sand products directly affects the quality of products, which is an important index to evaluate the quality of quartz sand. Sinonine provides silica sand (dry type or wet type) magnetic separation system, It combines with crushing & grinding process, it uses the high gradient magnetic separator, plate type magnetic separator and drum magnetic separator, so High, medium and low intensity magnetic separation shall be carried out on silica sand respectively to effectively remove mechanical iron, coated iron, strong magnetic and weak magnetic iron materials in silica sand.
Features
1. High, medium and low intensity magnetic separation process are used in combination, with a wide range of iron removal;
2. Appropriate magnetic separation process layout, good iron removal effect;
3. Thoroughly remove iron material, iron content reaches less than 20ppm or lower;
4. The production line has a wide range of applications and can be applied to all kinds of silica sand;
5. Simple process layout and convenient operation.
The technical process
In wet separation process , the classified silica sand slurry is concentrated to a certain concentration by slurry disliming and storage tank, and then through the drum magnetic separator to remove the strong magnetic iron material, and then enters the plate type magnetic separator with magnetic field strength around 1T to further remove the residual strong magnetic materials and parts of the weak magnetic materials, and then enters the high gradient magnetic separator with the magnetic field intensity of 1.5T - 2T to remove residual weak magnetic iron material. Magnetic separation tailings enter into the tailings settling pond for furthe treatment, and the finished products enter into the finished product pool or into the next step of purification process. In dry separation process, silica sand is first ground to a certain fineness, and a multi-stage dry magnetic separator is used to remove mechanical iron and coated iron in quartz sand.
Case 1：
Angola 30TPH High Purity Silica Prodcution Line
This Silica sand processing plant is mainly producing high-end silica sand. Its products mainly include high-purity glass sand for electronic and optical application, ultra-white glass and solar glass sand, silica sand for optical instrument and crystal, silica sand for quartz plate.
Case 2：
Huangshan Quartz sand beneficiation production line with an annual output of 100,000 tons
The project scale of production is 100000 tons a year high purity quartz sand. After crushing, the quartz sand enters into the rod mill for grinding, ground to a appropriate particle size, then the fine sand enters high gradient magnetic separator and plate type magnetic separator for iron removal, then goes to the classifying for obtaining sand within an appropriate particle size range, then the sand shall be by flotation further removed impurities, to get high purity quartz sand. Quartz sand slurry is dewatered to obtain the final product, and the tailings are concentrated and discharged dryly.The production line has been designed in detail, the technical process is reasonable, the equipment is advanced, the whole production line has realized the automatic control operation, the quartz sand product has exceeded the expected standard.
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