Has the latest use of coal gangue powder grouting technology made a breakthrough?

Through a lot of research and repeated demonstration in the early stage, the mine has actively tried the grouting and filling mining of overlying strata. This is a kind of green mining in which fly ash is injected into the separated zone generated in the overlying rock through ground drilling as a filling material to prevent or slow down the further subsidence of the rock above the separated zone, effectively slow down the ground settlement, and thus achieve surface subsidence reduction.After the implementation of the continuous mining and charging technology project, the process can recover 300,000 tons of raw coal per year on one side. As the main filling material of the new process, gangue is expected to require 430,000 tons of gangue to replace 300,000 tons of raw coal. After the operation of this production process, the mine’s current self-produced gangue cannot meet the demand, which can not only realize the return of gangue to the well, but also help the brother mine “digest” part of the gangue.

Coal gangue powder grouting process

Pulverized coal gangue grouting is through ground crushing, underground pulping and grouting, the coal gangue slurry is injected into the goaf to realize the underground grouting disposal of coal gangue. The coal gangue grouting system is to break the gangue into gangue powder by two stages in the mine, and make the appropriate concentration of the gangue powder. Using the scientific ratio and its fluidity, the adjacent position is filled to the underground goaf through the pumping and pipeline transportation system. The filling technology of gangue slurry integrates the traditional technology of separate layer grouting, goaf treatment, grouting fire prevention and long-distance pipeline transportation, which realizes the parallel, non-interference and filling with mining operation. It is suitable for mines with large amount of gangue, long haul distance and fully mechanized caving technology, which can help improve the quality and efficiency of coal mines while realizing solid waste treatment.

How to select pulverizer in coal gangue pulverizing grouting process?

In the process of coal gangue pulverizing grouting, it is necessary to use a pulverizing machine to grind coal gangue raw materials to fine powder. Which type of pulverizing machine is used for coal gangue pulverizing?Guikuang Machinery is a focus on research and development and production of ore slag mill manufacturers, the main products are large Raymond mill, new vertical mill, ultra-fine vertical mill, ring roll mill, according to the coal gangue powder grouting process requirements of coal gangue grinding to 80-2500 purpose fine powder, the production of 1 ton to dozens of tons. The mill has the advantages of high grinding efficiency, low power consumption, large feeding particle size, easy adjustment of product fineness, simple equipment process, small footprint, low noise, small dust, easy use and maintenance, low operating costs, less consumption of wear-resistant materials, etc., which helps the coal gangue processing enterprises to increase production and reduce the comprehensive investment cost of coal gangue processing.