Method for preparing sand from high strength rocks

Abstract

The invention discloses a method for preparing sand from high strength rocks. The method comprises the following steps of carrying out primary fragmentation of high strength rocks by a vertical shaft impact crusher, and carrying out secondary fragmentation of coarse sand having granularity of 5 to 2.5mm by the vertical shaft impact crusher. Compared with the prior art, the method provided by the invention solves the problem that a single vertical shaft impact crushing sand-making technology has unreasonable graduation and a large product fineness module, also solves the problem that a sand-making technology adopting a fine crushing process and a rod mill has a high running cost, low production efficiency and large energy consumption and noise, realizes adjustment and easy control of a product fineness module, greatly reduces work amounts of civil engineering and installation, and is a high-efficiency, energy-saving and product-controllable method for preparing sand from high strength rocks.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for making sand using high-strength rocks. Background technique [0002] In the concrete artificial sand and gravel production system, the sand making process is the most important process, and the sand making equipment is the most important production equipment. The performance of the sand making equipment and the rationality of the sand making process directly affect the entire artificial sand and gravel The investment in the processing system and the quality of the concrete. In the 1960s, the artificial sand and gravel system of Yingxiuwan Hydropower Station was the first to carry out the research experiment of rod mill machine-made sand, which achieved gratifying results and was used in engineering construction. Since then, the rod mill machine-made sand technology has made great progress in the artificial sand and gravel system of hydropower projects, an...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the unreasonable gradation of the existing single vertical shaft impact sand making process, the large product fineness modulus or the high operating cost, low production efficiency, energy consumption and noise of the fine crushing + rod mill sand making process Large and other defects, providing a method of using high-strength rocks to make sand

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