Multi-stage separation sand machining production line

Abstract

The invention relates to a multi-stage separation sand machining production line overcoming the defects that in the prior art, raw ore with the qualified granularity is prone to being excessively ground when secondarily crushed and ground, the content of ultrafine powder exceeds the standard, and the silicon sand particle yield and the unit manufacturing cost are affected. A two-stage screening system is arranged between a crusher and a small material bin and comprises a roller screen and a water flushing screen. A large particle returning belt is connected between the roller screen and the crusher. A medium particle front conveying belt is connected between the water flushing screen and the material bin. A small particle collecting pool is arranged at the lower portion of the two-stage screening system and connected with a post-grinding pool through a slurry pump and a pipeline. By means of the two-stage screening system, silicon sand crushed by the crusher is divided into large particles, medium particles and small particles according to the needed specification; the medium particles are conveyed into the material bin and enter a grinding machine; the small particles are directly conveyed into the post-grinding pool behind the grinding machine; and the large particles and the small particles do not enter the grinding machine, the phenomenon of excessive grinding is reduced, the work efficiency is improved, and material losses are reduced.

Description

technical field [0001] The invention relates to a sand processing production line, in particular to a multi-stage sorting sand processing production line capable of reducing silica sand overgrinding. Background technique [0002] As we all know, silica sand is the main raw material of the glass industry, which accounts for about 70% of the glass raw material consumption. Most of the siliceous raw materials in major glass producing countries in the world, such as the United States, Japan, the Soviet Union, West Germany, Belgium, etc. The weathering of raw ore is different, and the particle size distribution varies greatly. Glass raw materials are mainly artificial silica sand that is crushed from quartz sandstone and quartzite. [0003] The particle size control of glass quartz sand produced by various enterprises is not exactly the same. The particle size of silica sand for fused glass in my country is controlled at 0.1-0.75mm, of which the particle size of 0.25-0.5mm shou...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect that the qualified particle size in the raw ore in the prior art is easy to cause over-grinding through the secondary crushing and grinding process, making the ultra-fine powder content exceed the standard, affecting the finished product rate of silica sand grains and the unit manufacturing cost, a multi-stage separation is provided. Sand processing production line, add secondary screening, separate large particles, medium particles and small particles in the secondary screening to prevent over-grinding and ensure ultra-fine powder content up to standard

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