What is the latest use of coal gangue?

Coal Gangue Grinding Mill Factory learned of the latest use of coal gangue, made coal gangue into filling material to replace fly ash, and made new breakthroughs in coal gangue pulverization and grouting technology. This is a kind of green mining that injects fly ash into the abscission zone generated in the overlying rock through ground drilling as a filling material to prevent or slow down the further subsidence of the rock layer above the abscission zone, thereby achieving surface subsidence reduction. After the implementation of this 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 for the new process, gangue is expected to require 430,000 tons of gangue to replace 300,000 tons of raw coal. After the production process is running, the mine is currently The self-produced gangue cannot meet the demand, not only can the gangue be returned to the well, but also help the brother mines “digest” part of the gangue.

Coal gangue pulverization grouting is to inject the coal gangue slurry into the goaf through ground crushing, downhole slurrying, and grouting, so as to realize the underground grouting treatment of coal gangue. The coal gangue grouting system is to crush the gangue into gangue powder in two stages in the underground, and make the sieved gangue powder into a slurry of appropriate concentration, using scientific proportioning and fluidity, through the pumping and pipeline transportation system, adjacent Bit filling to the underground mined-out area. The gangue slurry filling technology integrates the traditional layer-separated grouting, goaf treatment, grouting fire prevention and long-distance pipeline transportation and other technologies, and realizes that the filling and coal mining operations are parallel to each other, do not interfere with each other, and can be filled at the same time as mining. For mines with a large amount of gangue, long haul distance and fully mechanized caving coal mining technology, it can help coal mines improve quality and efficiency while realizing solid waste treatment.