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Quartz sand mineral processing and purification equipment is mainly based on its mineral processing process, which mainly includes: crushing and screening, grinding, separation, dehydration and other parts. The separation operations (quartz sand purification) mainly include: scrubbing, magnetic separation, flotation, gravity separation, pickling, etc. The following will introduce the mineral processing equipment required for quartz sand around its process.
The crushing and screening equipment is used to crush and screen the mined quartz ore so that the minerals can initially complete the dissociation state. To facilitate subsequent selection. Commonly used equipment is: crusher, vibrating screen, electromagnetic iron remover, feeder, etc.
Crushing equipment: Jaw crusher is often used for coarse crushing; cone crusher is used for fine crushing;
Screening equipment: Generally, a circular vibrating screen can be used;
Iron remover: It is generally used before the cone crusher, and is used after the first stage of crushing. Remove some iron substances.
After crushing, the product will be sent to the grinding stage to continue grinding. The ground product needs the help of a scrubbing machine to remove the minerals. The film iron and muddy impurities attached to the surface are removed, and then the mud is separated from the quartz minerals through classification operations. The main equipment used is: rod mill, spiral scrubber, stirrer scrubber, hydraulic classifier, vibrating screen, hindered settler, etc.
Rod Mill: Generally, a wet rod mill is used. In addition to completing the grinding operation, it can also play a scrubbing role to a certain extent to remove impurities;
Spiral scrubbing machine:Suitable Suitable for processing natural or artificial sand with a mineral particle size of 0-6mm, and various loose mud particles or materials;
Agitator scrubbing machine:Suitable for processing high mud content quartz sand ore, especially for scrubbing sticky mud balls;
Vibrating screen:The self-centering vibrating screen is used for fine particle classification, and the circular vibrating screen is used for Coarse particle classification;
Classifier:Spiral classifier is used for coarse particle classification, and hydrocyclone is used for fine particle classification;
Obstructed Settler:It can strictly classify coarse and fine-grained quartz sand.
Quartz sand (silica) magnetic separator equipment is mainly used to remove strong magnetic and weak magnetic impurity minerals present in quartz. The magnetic separation equipment used mainly includes wet strong magnetic separator, high gradient magnetic separator, weak magnetic separator (medium magnetic separator), etc.
Wet type strong magnetic separator Selector:Generally, the magnetic field strength needs to reach 8×105A/m to remove weakly magnetic minerals such as hematite, limonite and biotite present in quartz sand.
High gradient magnetic separator: The magnetic field intensity should be greater than 12,000 Gauss. It is used for secondary magnetic separation of quartz sand containing iron impurities, or for processing some weakly magnetic minerals, such as angle. Amphibole, pyroxene and conjoined bodies of magnetic minerals and quartz, etc.
Weak magnetic separator: Mainly used to remove magnetite present in quartz sand, which is a strong magnetic separation of iron minerals.
Quartz sand flotation is mainly used to remove non-magnetic associated impurity minerals such as feldspar and mica in quartz. However, if the quartz and gangue minerals do not reach a certain degree of monomer dissociation, the grinding fineness needs to be increased through a ball mill. The equipment used at this time includes mechanical agitation flotation machine, inflatable agitation flotation machine and ball mill.
Mechanical agitation flotation machine: There are SF type flotation machines, JJF type flotation machines, and BF type flotation machines;
Inflatable agitation flotation machines:XCF type flotation machines, KYF type flotation machines Machine and two-machine combined unit;
Ball mill: Grid type or overflow type ball mill is mostly used, mainly based on its grinding particle size requirements.
Gravity separation equipment processes silica, mainly quartz ore with a small amount of heavy mineral impurities in the raw material. There is no magnetism in the mineral and its specific gravity is larger than quartz. , which can be separated from gangue by spiral chute equipment. It is worth noting that when spiral chute is gravity-selecting quartz, the separated quartz mortar can be divided into three parts: granular heavy mineral area, granular quartz sand area, and flake minerals and light minerals In this way, in addition to removing heavy minerals (such as zircon), it can also remove some flaky mica minerals.
In the separated silica quartz sand concentrate, if there is reddish colored sand ore , indicating that the ferrotitanium content is high, and the pickling method can be used to purify the quartz sand. The process is: first wash with water to remove parts and impurities, and then soak in water with pickling to obtain the product for drying or air-drying. The main application equipment is: pickling tank, and the rest are various pickling chemicals.
The quartz sand dehydration operation mainly concentrates and dehydrates the qualified concentrate products obtained after sorting to facilitate subsequent use or smelting. The process is to send the qualified quartz sand concentrate slurry to a concentrator for dehydration, and then enter the high-frequency dehydration screen for dehydration again to reduce the moisture content to less than 20%.
Concentration Machine:It is an inclined plate concentrator, suitable for concentrating and dehydrating fine-grained quartz sand, and its concentration and water return efficiency can reach more than 70%;
High-frequency dehydration screen: Used for dehydration of fine-grained quartz sand minerals, with a dehydration rate of more than 80%.
Quartz sand scrubbing-grading desliming method:Mechanical scrubbing machine is often used for desliming, and then the quartz sand is deslimed into a classifier. Separation of sand and clay impurities. Suitable for treating adherent clay and cementing minerals on the surface of quartz sand.
Scrubbing-desliming-magnetic separation method:After desludging by scrubbing machine, use a wet-type strong magnetic separator with a capacity of more than 10000Oe to remove iron, which is suitable for processing quartz sand containing weak magnetism. Impurity minerals (limonite, hematite, biotite, etc.).
Rod friction scrubbing-desliming-magnetic separation-flotation method:Add the screened quartz sand minerals into mineral processing agents, then scrub with a rod friction scrubber, and then enter The classifier performs desliming treatment, then enters magnetic separation to remove iron, and finally uses flotation to remove other hybrids. It is mostly suitable for processing quartz sand minerals containing feldspar.
Rod friction scrubbing-desliming-magnetic separation-flotation-acid leaching method:The process is as above. If the quartz concentrate obtained by flotation still contains impurities , it needs to be purified again by pickling (purified to more than 99.99% by acid leaching), which is mostly suitable for processing quartz ore with continuous spots and inclusions.
For timing quartz sand, silica sand beneficiation process plan and complete set of quartz sand beneficiation equipment, you can consult Xinhai Mining, 15311826613! Provide you with relevant quotations and equipment information.
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