Method and device for separating coal from gangue in pit by utilizing inclined belt conveyor

Abstract

The invention provides a method and device for separating coal from gangue in the pit by utilizing an inclined belt conveyor. The coal and the gangue are separated in the pit by utilizing a physical principle. The device mainly comprises two belt conveyors, wherein one belt conveyor is a horizontally-running belt conveyor and is mainly used for conveying the coal and the gangue from a working surface; and the other belt conveyor is an obliquely-running belt conveyor and is mainly used for separating the coal from the gangue. According to the method and device, the coal and the gangue have accelerated speeds in different directions on the inclined belt conveyor by utilizing different friction coefficients among the coal, the gangue and a conveying belt, so that the running directions of the coal and the gangue on the inclined belt conveyor are opposite; and the coal can be thrown out from the upper end of the inclined belt conveyor, and the gangue can be thrown out from the lower end of the inclined belt conveyor. The device for separating the coal from the gangue in the pit has the advantages of convenience in installation, simple structure, safety and reliability in running, small used space and the like; and the gangue can be effectively prevented from being discharged from a well, and the gangue can be directly backfilled into a goaf.

Description

technical field [0001] The invention relates to a method and a device for separating coal and gangue underground by using an inclined belt conveyor, and is a device that can be directly applied to separating coal and gangue underground in mines. Background technique [0002] In the process of coal mining, due to the mixing of a large amount of gangue in the top and bottom boards and coal seams, the mined coal contains a large amount of gangue. These coals cannot be used directly and need to be treated with gangue removal. [0003] In the traditional coal mining process, the coal containing gangue is treated by screening it in a coal preparation plant after being transported out of the ground. And this has many disadvantages and hazards. It takes a lot of extra energy to lift the gangue from the underground; it also consumes a lot of resources in the coal washing process; and the stacking of the separated gangue not only wastes land resources, but also spontaneous combustion...

AI Technical Summary

Problems solved by technology

And this has many disadvantages and hazards. It takes a lot of extra energy to lift the gangue from the underground; it also consumes a lot of resources in the coal washing process; and the stacking of the separated gangue not only wastes land resources, but also spontaneous combustion and rain. , mudification, etc., causing serious harm to the environment

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