Extinguishment composition, purpose of extinguishment composition and extinguishment method

Abstract

The invention discloses an extinguishment composition. The extinguishment composition comprises extinguishment powder and water, wherein the weight ratio of the extinguishment powder to the water ranges from 1:0.8 to 1:1.2. The extinguishment powder is composed of, by weight, 3 parts to 7 parts of calcium silicon residues, 1 part to 3 parts of fly ash, 1 part to 3 parts of flue gas desulfurization gypsum, and 0.5 part to 1.5 parts of cement. The invention further discloses an extinguishment method for spontaneous combustion of coal in a goaf. The method includes the first step of mixing and stirring the extinguishment powder with the water according to the weight ratio ranging from 1:0.8 to 1:1.2 to form extinguishment slurry, and the second step of injecting or spraying the extinguishment slurry manufactured in the first step into the goaf with the requirement for extinguishment so as to conduct grouting extinguishment. The invention further provides the purpose of using the extinguishment composition for conducting extinguishment for spontaneous combustion of the coal in the goaf. According to the method, less clay or loess is used, workloads for processing the extinguishment slurry are reduced, and acid gas produced by coal combustion can be solidified.

Description

technical field [0001] The invention relates to the field of fire extinguishing in goafs of coal mines. Background technique [0002] Because the goaf of the coal mine is not closed in time or is not tightly closed, wind will continue to leak in, causing the coal to oxidize continuously and generate heat. When the heat reaches a certain level, the coal will spontaneously combust. Goaf for fire fighting. At present, the commonly used fire extinguishing method is grouting, that is, after mixing loess or clay with water in a certain proportion to make slurry, it is transported to the spontaneous combustion area through the grouting fire extinguishing system, and the self-igniting coal, coal gangue, etc. are formed to wrap and isolate the air, thereby To achieve the purpose of fire extinguishing. [0003] Since the slurry used for fire extinguishing needs to meet a certain particle size to produce better results, the use of loess or clay slurry on the one hand wastes land reso...

AI Technical Summary

Problems solved by technology

[0003] Since the slurry used for fire extinguishing needs to meet a certain particle size to produce better results, the use of loess or clay slurry on the one hand wastes land resources and damages the environment. On the other hand, the particle size is difficult to meet the requirements, and a large amount of crushing and grinding is required. At the same time, the content of the prepared slurry is difficult to control, and the fire extinguishing performance is not stable enough

At present, some mining areas use other alternative materials for fire extinguishing, such as shale, gangue and ore dressing plant tailings, etc., but these materials require crushing technology to process raw materials, which is very troublesome, and the crushing of rocks generally takes up the ore processing plant More than 40% of energy consumption, crushing consumes both electricity and machines

In addition, since raw coal contains a variety of heteroelements, SO will be generated during combustion. 2 , SO 3 、H 2 S, CO 2 Even if the fire in the spontaneous combustion area is finally extinguished, these toxic gases will accumulate or overflow, causing adverse effects on coal mine workers or the atmosphere