5 Must-Have Features in a quartz sand beneficiation equipment

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According to the introduction of the previous article, we mainly learned about five kinds of equipment commonly used in quartz sand beneficiation, including rod mill, magnetic separator, flotation machine, hindered settler, and XCIII hydrocyclone. In this article, we will mainly introduce high-frequency high-efficiency dewatering screen, inclined plate thickener, scrubber, desliming bucket, and slurry pump. These five types of equipment are also commonly used in quartz sand concentrators.

01

High-frequency and high-efficiency dewatering screen

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The structure of high-frequency and high-efficiency dewatering screen includes vibration motor, screen, dewatering screen frame, support and rubber spring. High-frequency and high-efficiency dewatering screen is a new type of high-efficiency dewatering equipment with simple structure, convenient maintenance and simple operation.

In the quartz sand concentrator, the high-frequency and high-efficiency dewatering screen adopts a unique sieve plate structure, and the high-frequency vibration of the motor not only makes it difficult for the pulp particles to pass through the screen holes, but also has a higher dewatering efficiency, and the final water content is less than 15. % of dry heap tailings.

High-Frequency and High-Efficiency Dewatering Screen

02

Inclined Plate Thickener

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The inclined plate thickener is a slurry gravity thickening equipment designed with inclined parallel plates in the settlement area. The whole machine includes an upper box and a lower cone.

For the quartz sand concentrator, the concentration process of the inclined plate thickener is completed in each independent inclined plate channel, and the fine-grain overflow or clean water is directly discharged laterally from the overflow surface of each channel, which shortens the overflow discharge path and effectively solves the problem. The problem of short circuit and circulation of fine particles in the overflow discharge process ensures a high classification and concentration efficiency, and the return water efficiency of classification and concentration can generally reach more than 70%. Compared with other thickeners, the inclined plate thickener used in the quartz sand concentrator can accelerate the separation of ore particles, shorten the material settling time, strengthen the separation and settling process, improve the concentration efficiency, reduce capital investment, and increase the production capacity by about 3 times.

Inclined Plate Thickener

03

Scrubber

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With the help of the mechanical force of the scrubbing machine and the grinding force between the sand particles, the thin-film iron, bonding and muddy impurity deposits on the surface of the quartz sand are removed, and the mineral aggregates that have not been formed into monomers are further scraped, and then further purified by the classification operation. The role of silica sand.

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At present, the quartz sand scrubbing equipment mainly includes high-efficiency stirring scrubbing machines and spiral groove scrubbing machines.

The high-efficiency stirring scrubber is mainly composed of a motor, a reducer, a main shaft, upper, middle and lower impellers, and a tank body. The motor drives the three-layer specially designed rubber impeller on the main shaft to rotate through the hard-tooth surface reducer, and scrubs the material strongly. , low failure rate, suitable for natural or artificial sand with mineral particle size of 0-6mm, various loose mud particles or materials, for particle scrubbing and cleaning and mud material dispersion, dissociation, separation, can effectively remove glue adhered to Solvents and soils on mineral or material surfaces.

Spiral groove scrubber is composed of groove body, left and right helical blade shaft, transmission device and so on. The motor drives the two helical shafts to rotate relative to each other through the reducer and the large and small gears, and the blades on the helical shaft are staggered. The mud mass and the ore particles adhering to the surface of the ore slime are rubbed and scrubbed with the help of the blade and rinsed with an appropriate amount of high-pressure water from the upper end of the tank body, so that the ore slime can be broken up and separated from the ore particles to achieve the purpose of washing. The spiral groove scrubber has a better washing effect for the quartz sand with a certain proportion of mud content, especially for the viscous mud mass.

Scrubber

04

Desliming Bucket

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The desliming bucket is a simple equipment for classification, desliming and concentration. The pulp is fed into the central cylinder along the tangent direction and flows out from the bottom edge after buffering. The outflow pulp flows radially to the surrounding overflow dam. During this process, the coarse particles whose sedimentation velocity is greater than the liquid upflow velocity will settle in the tank and be discharged through the bottom grit. The fine particles enter the overflow tank with the surface slurry. Usually, the feeding particle size is less than 2mm, and the classification particle size is 75um or finer.

05

Slurry Pump

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The slurry pump is an important slurry conveying equipment in the quartz sand concentrator, and its function is to transport the slurry to the desliming bucket, the box filter press or other slurry transportation links. The slurry pump is lined with XH wear-resistant rubber, which not only enhances its own wear resistance, but also ensures that the desliming bucket and the box filter press are in good working condition and prolongs the service life of the slurry pump.

 

Slurry Pump

06

Summary

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In the actual beneficiation process, the selection of quartz sand beneficiation process and equipment is often determined according to various factors such as the nature of quartz sand ore, beneficiation plant conditions, and investment budget. If you want to select quartz sand more economically and environmentally, you should first carry out a mineral processing test, comprehensively analyze the properties of the ore, and obtain a scientific mineral processing test report, so as to judge which type of quartz sand beneficiation process and quartz sand beneficiation equipment to use. Comprehensive consideration The beneficiation plan is determined after the actual situation, investment and other factors of the beneficiation plant, and the quartz sand beneficiation equipment is tailored to achieve the ideal return on investment.

The processing technology of high purity quartz sand washing plant usually includes complex processes such as calcination, water quenching, classification, magnetic separation, flotation, acid leaching, cleaning and chlorination roasting.

Compared with general mineral processing engineering, high purity quartz sand processing equipment has the following characteristics:
1.The purity of reagents used in high purity quartz sand processing is high
Acid leaching and water washing is an important part of high purity quartz sand processing technology. Because high purity quartz requires high purity of SO2 and low content of impurity elements, the purity of reagents such as acid and water must meet the corresponding require
2.The reagents used in the processing of high purity quartz sand are highly corrosive
Hot acid leaching plays a key role in the purification and processing of high purity quartz. One of the important chemical properties of quartz is its excellent acid resistance (except HF), while other metal impurities in the ore are generally poor in acid resistance. Under certain temperature, this effect is more obvious.
The acid leaching process used in the high purity quartz processing is precisely using this principle to realize chemical purification. The results show that the metal minerals, iron bearing minerals, carbonate minerals and thin film iron between quartz particles can be removed by using the appropriate acid formula according to the characteristics of mineral raw materials.
If a certain amount of HF acid is added in the acid formula, it has a good effect on removing trace mica and feldspar in raw materials. Therefore, hot acid and HF acid and other strong corrosion reagents are often used.
3.The standard of raw materials used in high purity quartz sand processing is strict
It has been proved that in the purification process of high purity quartz, the materials such as containers that contact with raw materials have a significant impact on the quality of samples. Strictly controlling the material standard of each processing link of high purity quartz sand is the key to ensure the quality.
4.High purity quartz sand processing environment is demanding
The purity of SO 2 in high purity quartz determines that there should be no pollution in the production process. Due to the long processing flow and complex process of high purity quartz sand, it is difficult to realize full sealing in the production process.
In order to prevent dust pollution in the air, there must be strict requirements for air environment such as production, packaging and storage.
5. High purity quartz sand processing safety requirements
The high purity sand washing production line composed of corrosive reagent, toxic gas (if chlorination roasting) and high temperature must have higher production safety guarantee.
The particularity of the above process conditions determines the high requirements of high purity quartz processing and production equipment, and the development of safe, environmental protection, energy saving and efficient production equipment is the key condition for the realization of large-scale and industrialization.