Composition and preparation method for preparing cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks

Abstract

The invention discloses a composition and a preparation method for preparing a cross-linked graft copolymer for preventing flying dust and spontaneous combustion of coal storage stacks. The composition comprises 2%-5% of gelatin, 3%-5% of N,N-dimethylformamide, 4%-6% of ethyl phenylacetate, 0.3%-0.6% of a penetrant, 0.1%-0.3% of an antiseptic agent, 0.05-0.1% an initiator, 0.03%-0.05% a crosslinking agent and 0.1%-0.2% an inorganic salt. Gelatin, ethyl phenylacetate and N,N-dimethylformamide are subjected to a cross-linking and graft copolymerization reaction to finally form a flowing-state viscous agent. The viscous agent has the advantages that the dust suppression effect is good, the curing speed is fast, the formed protective layer is high in hardness, and the viscous agent is resistant to a certain strength harsh environment, and so on. The adhesive force of the dust suppression agent is relatively strong, a stable protection film is easy to form, and the protection film is not easy to break.

Description

technical field [0001] The invention relates to the field of dust prevention and suppression in coal storage sites, in particular to a composition and a preparation method for preparing a cross-linked graft copolymer for preventing coal storage dust and spontaneous combustion. Background technique [0002] With the development of the economy, the country has higher and higher requirements on the environment. Whether some high-pollution industries can carry out pollution prevention and control has become a key factor affecting the development of the industry, and coal mines are no exception. It is difficult to avoid stockpiling problems in the process of coal production and sales, but the main safety and environmental problems faced by coal mine stockpiling are dust and spontaneous combustion. Under the action of wind force, the stored coal produces a large amount of dust, which seriously affects the environment and restricts the development of coal mines. In addition, durin...

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Problems solved by technology

Under the action of wind force, the stored coal produces a large amount of dust, which seriously affects the environment and restricts the development of coal mines

In addition, in the process of coal storage, due to the adsorption of oxygen in the air and oxidation, the heat generated by the oxidation accumulates to a certain extent and causes spontaneous combustion, which not only wastes energy but also pollutes the environment

Dust suppressants in the prior art are generally used for dust prevention and control of underground mining working faces, mainly some foam dust suppressants or dust suppressants obtained by compounding surfactants. This kind of dust suppressants are used in coal storage In dust prevention, the effect of dust suppression is not ideal. More importantly, these water-based dust suppressants can also provide moist heat for the oxidation of coal, thereby promoting the occurrence of coal spontaneous combustion

There are few studies on dust suppressants for coal stockpiling in open-air environments. The few dust suppressants suitable for coal stockpiling in open-air environments are not only relatively expensive, but also the selected raw materials are difficult to degrade and easily pollute the environment.

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