Attapulgite mesh gel foam mud fire extinguishing agent

Abstract

The invention discloses an anti-fire extinguishing agent for attapulgite reticulated gel foam mud, the key point of the technical scheme is that the anti-fire extinguishing agent for attapulgite reticulated gel foam mud is sprayed with attapulgite composite flame-retardant foaming agent and inorganic fiber Cotton, high viscosity attapulgite clay powder, pyroclastic rock mixture, coal gangue powder, sodium alginate and water. Input the ingredients of the attapulgite reticulated gel foam mud fire extinguishing agent into the rake type mixer, and stir at a high speed to form the attapulgite reticulated gel foam mud fire extinguishing agent. The reticular gel foam slurry is sprayed onto the burning coal seam by an inorganic fiber sprayer, which is conducive to the formation of an integral reticular gel foam slurry film in the process of fire prevention and extinguishing, which always covers and adheres to the surface of the mine layer and quickly isolates the combustion The contact between the coal seam and the air prevents the coal mine from continuing to burn, avoids the coal seam from re-igniting, and achieves the purpose of flame retardancy and fire prevention.

Description

technical field [0001] The invention relates to an anti-fire extinguishing agent, in particular to an attapulgite mesh gel foam mud anti-fire extinguishing agent. Background technique [0002] Fully mechanized top-coal caving mining has the advantages of high yield, high efficiency, and low consumption, and has been widely used in many coal production bases in my country. However, due to the high mining intensity of this coal mining method, there is a lot of residual coal left in the goaf, the height of the fall is large, and the air leakage is serious. A series of problems such as fire, gas, and dust that are difficult to solve often occur, especially fire. [0003] Foam fire extinguishing agents are divided into chemical foam, air foam, fluoroprotein foam, aqueous film-forming foam and alcohol-resistant foam. [0004] Chinese Patent Publication No. CN 102614615A, publication date: August 01, 2012, titled "a composite foam fire extinguishing agent for coal mine underground...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the above-mentioned patents are: although the foam multiple of the fire extinguishing agent can reach 20 to 200 times, and the foam stability time is ≥ 2.5 hours, it can only make the "inert gas carbon dioxide foam spread in the fire zone and fill its space in a short time." , so that the oxygen concentration in the fire area drops rapidly, causing the fire area to suffocate due to lack of oxygen", it cannot really isolate the contact between the burning coal seam and the air, prevent the coal mine from continuing to burn, avoid the re-ignition of the coal seam, and achieve flame retardancy and fire prevention. Purpose

Ammonium bicarbonate is used as the main raw material of the fire extinguishing agent. During the fire extinguishing process, a large amount of ammonia gas will be released, which pollutes the air in the mine and is not conducive to the health of operators.

[0006] Pyroclastic rocks coexist with attapulgite clay deposits. Pyroclastic rocks are mostly in the upper layer of attapulgite clay deposits. In some attapulgite clay deposits, the thickness of pyroclastic rock layers in the upper layer is as high as tens of meters. During the mining of attapulgite clay, pyroclastic rocks in the upper layer of the attapulgite clay mining area are discarded as waste. According to field investigations, more than 30 tons of pyroclastic rocks are produced for every ton of attapulgite clay mined. Calculated at an annual output of 150,000 tons, the generated pyroclastic rocks are as high as 4.5 million tons, which have not been utilized for many years. The entire mining area is full of re-accumulated pyroclastic rock mixtures, causing serious waste of resources and economic losses.