Sand-washing technique of slate flour

Abstract

The invention relates to a process for sand washing with stone dust. The invention is characterized in that the process for sand washing with stone dust comprises the following steps: (1) performing filtering and water scrubbing to separate out fine sand, soil particles and water; (2) sending the separated rough sand into a crusher for crush with water; (3) separating the sand, soil particles and water which are recrushed, refiltered and rescrubbed and the mixture of the sand, soil particles and water which are crushed, refiltered and scrubbed at the first time; (4) separating the mixture of sand, soil particles and water and then obtaining the finished sand and the finished soil particles which can be used to improve soil, wherein the water can be recycled for use. The invention performs three-waste treatment and processing to the waste stone dust generated during the production in a quarry, uses the stone dust which contains dust, fine sand and rough sand in the quarry as the raw materials to produce the building sand, thereby not only saving the problem concerning the shortage of the natural fine aggregate resource, but also being favorable for the environment protection in a aggregate production place and reducing the stacking place of the quarry waste and the environmental pollution.

Description

technical field [0001] The invention relates to a process for washing sand by using stone powder containing dust, fine sand and coarse sand in a crushing stone field as raw materials to produce construction sand. Background technique [0002] At present, the stone powder discharged from the quarry production is the waste in the production, which contains dust, fine sand and coarse sand. The annual discharge of stone powder in the gravel field is very large, and it is increasing every year. A large amount of waste stone powder will cause environmental pollution. It will not only occupy a large amount of land, but also waste manpower and material resources for the maintenance of the discharge site, and will also lead to secondary pollution of the environment. Excessive collection of sand from mountain quarrying will not only destroy a large amount of cultivated land and cause soil erosion, but also cause harm to the environment and seriously damage the ecological balance and ...

AI Technical Summary

Problems solved by technology

A large amount of waste stone powder will cause environmental pollution. It will not only occupy a large amount of land, but also waste manpower and material resources for the maintenance of the discharge site, and will also lead to secondary pollution of the environment.

Mountain quarrying, digging, digging, sand washing, and excessive collection of sand not only destroy a large amount of cultivated land every year, causing water and soil erosion, but also cause harm to the environment, seriously destroying the ecological balance and natural landscape