Sand-making dry method by using granite leftover rock powders and rock ballasts

Abstract

The invention discloses a sand-making dry method by using granite leftover rock powders and rock ballasts. The method comprises the following steps: 1) selecting the granite leftover rock ballasts and crushing; 2) removing the powders with a particle size below 0.075mm from the crushed sand-powder mixture and granite leftover rock powders by an air classification blower so as to leave the sand grains with a particle size above 0.075mm, and screening the sands with uniform particle size; 3) repeating the step 1) and the step 2) on the remaining large clastic rocks processed in the step 2) to obtain the sands with uniform particle size; 4) adding the rock powders with small particle size, screened in the step 2) by a screen, into a coagulator to obtain lumps; 5) carrying out the step 1) and the step 2) on the lumps to obtain the sands with uniform particle size; 6) repeating the step 1) and the step 2) on the remaining lumps to obtain the sands with uniform particle size; and 7) repeating the step 4) and the step 5) on the micro powders with smaller particle size processed in the step 5) to obtain the sands with uniform particle size. The method provided by the invention can turn waste into wealth and protect the environment.

Description

Technical field: [0001] The invention belongs to the field of comprehensive utilization of granite waste, in particular to a method for making sand by using the leftover granite powder and stone slag in a dry process. Background technique: [0002] The existing traditional sand making process uses water washing to make sand, which causes water pollution; the water consumption is large, and with the development of the stone industry, the granite waste is not used rationally, resulting in waste of resources and deterioration of the ecological environment. The prior art has not yet applied the artificial sand making by the dry method of granite leftover stone powder. Luoyuan is one of the important stone processing and production bases of granite slab materials in our province. The development of the stone industry has brought about the deterioration of the ecological environment. This invention focuses on absorbing the leftovers of Luoyuan granite to promote environmental prot...

AI Technical Summary

Problems solved by technology

[0002] The existing traditional sand making process uses water washing to make sand, which causes water pollution; the water consumption is large, and with the development of the stone industry, the granite waste is not used rationally, resulting in waste of resources and deterioration of the ecological environment

The prior art has not yet applied dry artificial sand from granite waste stone powder