Conventional quartz sand magnetic separation process and required equipment

15311826613

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Quartz sand is a kind of non-metallic mineral and can be widely used in industry to make glass, produce metallic silicon, organic silicon compounds, etc. The main extractable component of quartz is silica, which can be purified through various beneficiation methods and then smelted to make various materials.

There are many quartz sand beneficiation and purification processes, such as: scrubbing, flotation, magnetic separation, gravity separation, acid leaching process, etc., the following editor will mainly focus on The quartz sand magnetic separation process will be introducedand related mineral processing equipment will be introduced.

No matter what kind of magnetic separation method is used, the quartz sand magnetic separation process will follow the steps of crushing-wet grinding-grading-iron removal (magnetic separation).

Quartz sand crushing process

The quartz sand crushing process mainly involves the preliminary separation of quartz sand and other gangue minerals through crushing. Generally, a three-stage crushing process is adopted, namely coarse crushing, medium crushing and fine crushing.

Coarse crushing of quartz sand:Jaw CrusherCarry out coarse crushing and feed the mined quartz sand ore into the jaw crusher In the process, crushing operation is carried out, crushed to about 25mm, and then sent to by belt conveyorScreening machineScreening,The objects on the screen >25mm ore particles are crushed in the jaw and then crushed,and Ore particles <25mm below the screen are sent to the secondary crushing operation by a belt feeder.

Quartz sand secondary crushing: Generally, a hammer crusher can be used for secondary crushing, and sometimes a jaw crusher can be used for secondary crushing. After coarse crushing, the product is crushed by hammer crushing. The product particle size range is in the 15mm range. If it is larger than this particle size, it will continue to be crushed. If it is smaller than this particle size, it will enter the fine crushing operation.

Fine crushing of quartz sand: Generally, a cone crusher is used for fine crushing operation. The crushing particle size is fine, uniform, and the processing capacity is large. Usually it can be crushed to less than 9mm, the crushed to qualified materials are sent to the grinding operation by the belt feeder to further achieve monomer dissociation.

Quartz sand crushing and screening equipment mainly includes: Jaw crusher, cone crusher, impact crusher, hammer crusher, roller crusher, circular vibration sieve, linear vibrating screen, etc.

Quartz sand wet grinding-grading process

The grinding operation is to further separate the quartz minerals into monomers to achieve the required particle size for glass production (0.106~0.425mm or 40 ~140 mesh). Often a stage of grinding-grading operation is used.

The materials that are about to be crushed are sent to Rod mill is ground, and the ground fine-grained materials are fed into the desliming hopper for desliming and dehydration, and then fed into the cylindrical screen (or hydraulic classifier) for classification , 0.425mm coarse sand is returned to the rod mill for regrinding, 0.106~0.425mm particle size is qualified product, and <0.106mm fine sand is used as tailings removal. Except.

Quartz sand grinding and classification equipment include: Wet rod mill, wet ball mill, spiral classifier, cylindrical screen, hydraulic classifier, hydrocyclone, high-frequency vibration Fine sieve etc.

Quartz sand iron removal (magnetic separation) process

The main purpose of the quartz sand magnetic separation process is to remove iron impurities that are dissociated during the rod milling process, such asbrown Weakly magnetic mineralssuch as iron, hematite, biotite and tourmaline. The medium-strong magnetic separation process is often used.

The qualified products after classification are sent to cylindrical permanent magnets In the selection machine, medium-intensity magnetic separation is carried out, and the field strength is 0.6T. The quartz sand obtained after magnetic separation also contains a small amount of weakly magnetic iron oxide and other impurities. Therefore, it needs to enter the high-gradient magnetic separator ( Strong magnetic separation is carried out in a magnetic field with a magnetic field strength of about 13,000 Oersted) to completely remove iron impurities and achieve quartz sand purification.

Quartz sand magnetic separation (iron removal) equipment mainly includes: Iron remover, cylindrical permanent magnet magnetic separator, high gradient magnetic separator, magnetic rod chute, magnetic plate magnetic separator Machine selection, etc.

The above is an introduction to the quartz sand magnetic separation process and related mineral processing equipment. In the actual mineral processing plant, according to the different ore properties of quartz sand and the types of impurities contained, the magnetic separation process is also different. It is recommended to customize a suitable quartz sand magnetic separation process after passing the mineral processing test and scientific and reasonable analysis. Process and related mineral processing equipment.