When producing prestressed high-strength concrete pipe piles (abbreviated as PHC pipe piles), the production process of "secondary curing" that combines atmospheric pressure steam curing and steam curing is usually adopted. By utilizing the characteristics of hydrothermal synthesis reaction in the steam curing process, PHC In the production process of pipe piles, silica sand powder (or finely ground sand) is used to replace 20% to 30% of Portland cement. This technology can not only reduce the amount of cement, save energy and reduce consumption, but also effectively use the quartz waste from mines. Debris resources have good technical and economic benefits. Then, what equipment is used to produce finely ground silica sand for pipe piles? Guilin Hongcheng is a manufacturer of silica sand grinding mills. The HLM silica sand vertical grinding mill we produce is used for fine of pipe piles. Silica sand production has been widely used, today I will introduce it to you in detail.
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So, what equipment is used to produce finely ground silica sand for pipe piles to meet the quality requirements of finely ground silica sand for pipe piles? Silica sand is a hard, wear-resistant and chemically stable silicate mineral with Sio: as the main mineral component and a particle size of 0.020-3.350mm. Its color is milky white, light yellow, brown and gray, hardness 7, brittle without cleavage, shell-like fracture, oily luster, relative density is 2.65, insoluble in acid, slightly soluble in KOH solution, melting point 1750C. According to the physical characteristics of silica sand and the quality requirements of finely ground silica sand products for pipe piles. It is considered that the roller mill, vertical mill and ball mill can all meet the technological requirements of silica sand grinding. When the silica sand processing capacity is 5-10t/h, the counter-roller is used as silica sand grinding equipment. Although the production capacity is large, the system investment is high. After the secondary crushing, the product particle size is difficult to meet the requirements, and the quotation is high. There is a lack of necessary experimental data. It is difficult to meet the requirements; the ball mill is easy to over-grind, the particle size is difficult to control, the energy consumption is large, the production capacity is low, the process flow is complicated, and the equipment occupies a large area. Although the investment price is low, it is not suitable for the large-scale production of finely ground silica sand for pipe piles. Therefore, after the necessary selection of pipe pile customers, HLM silica sand vertical mill was finally selected as the finely ground silica sand production equipment for pipe piles. As a silica sand grinding equipment, the silica sand vertical mill has large capacity, simple system, reliable operation, convenient operation, controllable product fineness and low energy consumption. Its working principle and performance characteristics are as follows:
①Working principle: The vertical mill motor drives the grinding disc to rotate through the vertical reducer, and the solid raw material enters the center of the grinding disc from the feed inlet through the air lock feeding device, and is thrown to the periphery of the grinding disc under the action of the centrifugal force field and is received by the grinding roller. crushed repeatedly. The crushed material overflows from the edge of the grinding disc, and the powdery material in it is taken up by the high-speed airflow rising from the lower part of the machine, and the rising airflow and powdery material pass through the mill. In the upper part of the powder classifier, under the action of the fast-rotating rotor, the coarse powder is separated and falls into the center of the grinding disc for re-grinding, while the fine powder comes out from the upper part of the mill with the airflow and is collected in the dust collection device, that is, for the product. The granular materials that are not taken away by the air flow, after overflowing the grinding table, return to the feed inlet of the mill through the bucket elevator of the external circulation, and enter the mill for re-grinding together with the newly given raw.
②Performance characteristics:
1. Integrating the functions of grinding, drying, grading and conveying, the operation and adjustment are more convenient, the degree of automation is high, and the processing capacity of a single machine is large.
2. The fineness of the milled product is adjustable, and the powder selection efficiency is high.
3. Small wear, low steel consumption, high wear-resistant materials for disc lining and roller surface, long service life.
4. Reliable operation, convenient maintenance, the grinding roller can be turned out of the body when maintenance.
5. Small vibration, low noise, no dust in negative pressure operation.
As a manufacturer of silica sand vertical grinding mills, Guilin Hongcheng has put into production many finely ground silica sand production projects for pipe piles, and has been well recognized and favored by customers. If you want to know more about the equipment configuration and production operation of finely ground silica sand for pipe piles, please leave us a message for details.
