Method for preventing spontaneous combustion of stored coal piles by covering coal piles by utilizing oxygen-insulating materials

Abstract

The invention relates to a method preventing the spontaneous combustion of stored coal piles by covering coal piles by utilizing oxygen-insulating materials, which comprises the following steps: crushing and screening the oxygen-insulating materials so as to obtain granulated oxygen-insulating materials with a grain size less than 6mm; determining the required covering thickness of the oxygen-insulating materials according to the shortest spontaneous combustion period of a coal pile corresponding to the covering thickness of the oxygen-insulating materials; and paving the oxygen-insulating materials on the surface of the mid-lower part of the coal pile. Because the oxygen-insulating materials with smaller osmotic coefficient are adopted to cover the surface of the coal pile, the air is inhibited from entering the coal pile in a diffusion or seepage mode, and the rate of low-temperature oxidation reaction of coal and oxygen is lowered so as to achieve the purpose of preventing the spontaneous combustion of stored coal piles.

Description

technical field [0001] The invention relates to a method for preventing spontaneous combustion of coal, in particular to a method for covering coal piles with an oxygen-insulating material to prevent spontaneous combustion of coal piles. Background technique [0002] Coal spontaneous combustion is one of the major disasters that threaten the safety of coal mines and coal transportation. In my country's key state-owned coal mines, mines with the danger of spontaneous combustion account for about 51.3%, and fires caused by spontaneous combustion account for more than 90% of the total number of fires, which seriously threaten the safety of people's lives and property. Spontaneous combustion of coal produces a large amount of SO 2 、H 2 S, CO and CO 2 gas, seriously polluting the environment. At present, with the development of the economy, the demand for coal is increasing day by day, the regional span of transactions is gradually increasing, and the coal storage of coal por...

AI Technical Summary

Problems solved by technology

However, the above methods have their own limitations, and their popularization and use are limited.

For example, the water injection cooling method increases the water content of coal; organic gel, water glass and water mortar cover all increase the ash content of coal, which affects the quality of coal. At the same time, the use of these materials in port storage will affect the normal loading and unloading of coal. It is necessary to remove the material separately before it can operate normally; it is more expensive to set up wind barriers; the coal pile with small inclination angle occupies a large area; the compaction method is difficult to prevent the spontaneous combustion of large coal piles

Images