Development Prospect of Quartz Sand Deep Processing| Advantages of Quartz Sand Vertical Roller Mill

A few days ago, Hainan Province of China issued a document that clearly stated that the mining of quartz sand ore should be more refined and in-depth processing of quartz sand raw ore or primary products. The quartz sand deep processing product catalog includes the production of photovoltaic (ultra-white) glass sand, silica powder, plate sand (powder), casting sand (including 3D printing sand, coated sand), oil fracturing sand and other higher-grade quartz sand concentrate and downstream silica sand products. These quartz sand deep processing products cannot be separated from the support of quartz sand deep processing equipment. HCMilling(Guilin Hongcheng) is a manufacturer of quartz sand grinding mill machine equipment. The following describes the advantages of quartz sand vertical roller mill as a quartz sand deep processing equipment.

Quartz sand is a hard, wear-resistant and chemically stable silicate mineral. Its main mineral composition is SiO2. The color of quartz sand is milky white, or colorless and translucent, with hardness of 7. It is brittle without cleavage, shell-like fracture, and greasy luster. Its chemical, thermal and mechanical properties have obvious anisotropy. After the quartz sand mined from the mine is processed by the quartz sand grinder, the products with fineness of more than 120 mesh (less than 120 mesh) are generally called quartz sand, and the products with fineness of more than 120 mesh are called silica powder. As a basic industrial raw material, high-quality quartz sand deep-processing products are widely used in glass, glass fiber, ceramics and refractory materials, metallurgy, construction, chemical industry, casting, abrasive materials, electronics, optical fiber and other industries.

At present, the main quartz sand deep processing equipment for grinding quartz in China are quartz Raymond mill and rod mill. The quartz Raymond mill has low efficiency and high energy consumption. When using rod mill, the above parameters are not as good as quartz Raymond mill, and the product size cannot be controlled. How to greatly increase the production capacity of quartz micro-milling while reducing the iron content in it, and how to save energy and reduce consumption are the technical problems that must be solved in large-scale production of this industry. In view of the above problems, the HLM quartz sand vertical roller mill developed and produced by HCMilling(Guilin Hongcheng) is likely to provide support for large quantities of grinding quartz to reduce energy consumption per unit product. So, what are the advantages of quartz sand vertical roller mill as quartz sand deep processing equipment?

HLM quartz sand vertical roller mill is a high-efficiency energy-saving equipment for drying and grinding developed by HCMilling(Guilin Hongcheng) on the basis of widely absorbing foreign advanced technology and summarizing the application experience of vertical roller mill at home and abroad. It not only has the advantages of the maintenance of the turnover roll of the Lecher mill, but also has the characteristics of the reversible use of the MPS mill roll sleeve and long service life. It integrates fine crushing, drying, grinding, powder selection and transportation. It has the advantages of high grinding efficiency, low power consumption, large drying capacity, easy adjustment of the product fineness, simple process flow, small floor area, low noise, no dust pollution, low wear, convenient maintenance and reliable operation. The grinding roller of the quartz sand vertical roller mill adopts the tire type, and the grinding plate liner adopts the bowl type. On the one hand, in order to avoid the edge wear effect of the working surface of the grinding roller, it can be turned upside down and reused to extend the service life. The camber of the tire type grinding roller tends to be steep, and the drum roller-bowl plate structure is used to exhaust gas by itself, so as to realize the principle that the single roller prepares the material bed by itself to control the material bed and reduce the vibration. The gap between the inner side of the grinding roller and the roller plate is large, forming a material bed preparation area.

The material bed is loose, and the gap between the outer side of the grinding roller and the roller plate is small. The material bed is further dense, forming an efficient grinding area. In the whole grinding process, even if the specific surface area of the finished product is large, it can be weakly magnetic. On the contrary, the high chromium cast iron mixed in the quartz powder due to wear is easily attracted by the magnet, so even if there is a small amount of mechanical iron in the powder, it is also easy to remove. According to process control, our quartz sand vertical roller mill can control mechanical iron pollution within 30ppm.

The process flow of quartz sand deep processing provided by the quartz sand vertical roller mill is as follows: the crushed granular quartz is stored in the raw material bin, and the valve is installed under the bin. After being lifted to the height required by the process system by the bucket elevator, it falls onto the leather machine. After the final iron removal, it falls into the intermediate bin, and is closed and connected with the closed quantitative feeder at the lower part of the bin. In addition, the closed is the closed connection between the quantitative feeder and the quartz sand vertical roller mill, so that the materials in the intermediate silo can play a good role in the medium of air lock. The closed quantitative feeder has four major functions: belt weigher, conveying material, cooperating with wind lock and quantitative feeding. Under the action of the closed quantitative feeder, the material is fed into the quartz sand vertical roller mill, where it is squeezed and ground into powder by the relative movement of the grinding roller and the grinding plate. The powder is selected by the powder concentrator in the mill, and the qualified powder is brought out of the mill with the airflow in the mill, and is collected by the high concentration pulse bag dust collector as a finished product: the unqualified coarse particles fall onto the grinding plate to continue grinding. Natural air can be used for ventilation in the mill. If the original moisture content of the crushed stone is more than 4%, the hot air generated by the hot air stove can also be introduced to evaporate the moisture of the raw material, and ensure that the moisture content of the product is less than 1%. In order to improve the grinding efficiency of the quartz vertical roller mill, on the basis of the internal circulation of the powder separation in the mill, the process layout adopts the design that can return the slag from the mill to the system equipment. By adjusting the return amount of the slag, the grinding efficiency can be improved, and the service life of the grinding roller and the grinding disc can be extended. The finished quartz powder collected by the dust collector is sent to the quartz powder bin through the conveying device for use.

Compared with the traditional quartz sand deep processing equipment, the single machine production capacity of the quartz sand vertical roller mill has been greatly improved, which meets the needs of large-scale industrial production in the quartz sand deep processing industry. At the same time, the energy consumption per unit product and equipment consumption are more than 40% lower than that of the grinding system of quartz Raymond mill. HLM quartz sand vertical roller mill has good adaptability for grinding quartz fine powder with high hardness and fineness. If you have relevant requirements, please contact mkt@hcmilling.com or call at +86-773-3568321, HCM will tailor for you the most suitable grinding mill program based on your needs, more details please check www.hcmilling.com.