Quartz sand, also known as silica sand, is a wide range of applications of non-metallic materials, mainly used in building materials, glass, ceramics, laser, optical cable, electronics and other fields. The actual production of quartz sand quartz ore by crushing either prepared to be presented by quartz sands obtained.

In the field of mineral processing capable of industrial application called siliceous quartz mineral resources of raw materials, mainly quartzite, quartz veins, quartz sandstone, quartz powder, natural quartz sand and natural crystal and the like. Quartzite and quartz veins where fewer impurities, commonly used to produce high purity or ultra high purity quartz sand, quartz sand is generally used for this high-end segment.

Since hybrids and natural quartz sand content and bad quality minerals itself, so commonly used in glass, ceramics, casting and other fields. Our quartz rich reserves of mineral resources, but lean ore, less high-grade ore, advanced quartz mine rare, mostly quartz resources associated a large number of impurities, only the use of a certain means of separation and purification can be used as industrial raw materials.

In the actual production of quartz sand beneficiation process can be divided into dry and wet beneficiation beneficiation, low dry beneficiation product quality, as most of building materials, but the wet beneficiation process complex, high-quality earnings, can say that all high-quality quartz sand is made from a wet beneficiation process technology. Purity quartz sand conventional purification processes are washing, grading off the mud; scrub; magnetic separation; flotation and acid leaching of microbial leaching, etc., in addition to electricity and heat chlorine election law quartz sand further proposed process.

Common quartz sand beneficiation Process description:

First, the crushing and screening stage

Quartz or quartzite larger particle size of the ore mined after the first selection from the ore gray small particles of high purity, and then singled out within the ore into the crusher jaw crusher or cone crusher, via the loop round vibrating screen and crushing plant constructed to ensure that the size of the crushed product. Sand crushed product recycling operations carried sand, quartz sand end up with a certain particle size. Quartz sand processing equipment main crushing and screening equipment as follows:

Second, the grinding stage

Quartz sand mining operations usually a period or lattice-type ball mill + overflow type ball mill grinding two paragraphs, the second paragraph of grinding operations and spiral classifier or hydrocyclone constitute closed circulation, in order to ensure the grinding fineness. Traditional mill wear faster, energy consumption and other shortcomings, ball mill Baoshan company conducted a series of transformation, such as the use of new wear-resistant rubber lining, change the sliding Rolling bearings, large-scale mills and other measures to improve the mill operation At the same rate also extend the useful life of equipment, for enterprises to create economic benefits.

Common quartz sand beneficiation process Introduction

A crushing stage

In the beneficiation production practice, quartz sand ore crushing and screening process is a closed three-stage process. Copper-molybdenum ore after crushing, after broken, products to the screening equipment, the undersize material as a product into the mill, to give crushing machine for crushing oversize material. Stage crushing and screening equipment used mainly as follows:

 Hammer Crusher

Second, grinding and separation stage

After obtaining a certain size quartz sand, to obtain high purity industrial quartz sand needed to use certain technology for further purification, the purification process using quartz sand are washed, graded Desliming; scrub; magnetic separation; flotation microbial leaching and acid leaching, etc., in this process of these briefly.

Washing, grading Desliming: quality quartz sand quartz with small particle size is reduced, while impurities such as Fe, Al, by contrast, the high clay content of the silica sand is particularly evident, therefore, quartz sand washed, de-rating mud is a necessary preparations.

Scrub: scrub job mainly quartz sand by mechanical friction force between the quartz grains of quartz sand to wipe the surface of the adhesive film or the iron impurities, while quartz particles are further broken. Recycling hydrocyclone separated scrubbing slurry fine-sized particles, in order to obtain higher purity quartz sand.

Magnetic: quartz sand magnetic separator can effectively remove the hematite, limonite, biotite weak magnetic impurities, weakening in quartz sand processing equipment is usually wet permanent magnetic drum magnetic separator, high intensity magnetic separation equipment or wet high intensity magnetic separator high gradient magnetic separator.

Flotation: flotation is mainly quartz sand in order to remove the feldspar, mica and other non-magnetic impurities, quartz and feldspar separation is very important process, as commonly used in industrial HF activated under certain PH with cationic collector agent flotation separation.

Acid Leaching: In addition to quartz dissolved HF has almost insoluble in use quartz sand of this nature on its separation and purification of hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, industry.

Microbial leaching: This quartz sand beneficiation process is a new technology, the main use of black Aspergillus, Penicillium, Pseudomonas, Bacillus and other microorganisms polymyxin film to remove iron or iron disseminated quartz sand surface, which kinds of technology to achieve good results in the lab, but industrial use requires further study.

Quartz sand beneficiation process of grinding and separation processes used in the mill, classifier, flotation machine, as shown below:

（Saving wet lattice-type ball mill）

（KYF type inflatable flotation machine）

（High weir spiral classifier）