Photometric sorting process for coal gangues arranged in coal mine underground roadway

Abstract

The invention discloses a photometric sorting process for coal gangues arranged in a coal mine underground roadway. According to the photometric sorting process for the coal gangues arranged in the coal mine underground roadway provided by the invention, on the basis of the development of an existing technology, by breaking through a traditional ground stacking type arrangement idea and optimizingspace-time connection of various working units in a process flow, a coal mine underground modular compact type high-efficiency sorting system is built, process steps such as coal mining, raw coal preparation, coal gangue photometric sorting, and gangue backfilling are accurately matched and cooperatively optimized, so that the coal mine underground modular compact type high-efficiency sorting system is suitable for a coal mine with the content of +150mm particle size in raw coal being below 10 percent and a brittle coal property, the coal mine underground gangues can be discharged from the source, the number of the gangues lifted to the ground is reduced, the transporting and filling cost is saved, and an environmental requirement is met. Meanwhile, according to high-efficiency sorting ofthe coal mine underground gangues provided by the invention, the gangue lifting amount can be reduced, the mining quantity and the production efficiency of a coal mine are effectively improved, and atechnical support is provided for coal mine underground mining-washing-filling cooperation work; and meanwhile, the sorting process provided by the invention has no special requirements on the coal mine underground roadway and a chamber, and is suitable for an underground narrow chamber space.

Description

technical field [0001] The invention relates to the field of coal gangue separation in coal mines, in particular to a coal gangue photoelectric separation process arranged in tunnels in coal mines. Background technique [0002] The domestic photoelectric sorting industry started in the 1990s, and quickly entered a period of rapid development on the basis of introducing and digesting foreign technologies. From the initial sorting and processing of grains, beans, seeds and food, it gradually expanded to other fields. And from around 2014, it began to be used in the field of coal gangue sorting. In 2014, six coal mines in Pingzhuang of Guodian Group tried the GDRT intelligent dry separation system; in 2015, Tongmei Group conducted a test of the KRS intelligent dry coal separation system on the mine, and the on-site gangue discharge efficiency reached more than 85% with simple equipment , the economic benefits are obvious; Hancheng Mining Group carried out the BIRTLEY dual-ener...

AI Technical Summary

Problems solved by technology

[0004] However, the photoelectric separation technology of coal gangue is applied in underground coal mines, and there are no reports and application cases at home and abroad. The main reason is that the equipment for deep underground coal gangue separation needs modular and lightweight structural design and spatial layout, and it is necessary to break through the traditional ground stacking Layout concept to optimize the time-space connection of each operation unit in the process flow

Images