Nitrogen-phosphorus-silicon synergistic coal flame-retardant dust suppressant and preparation method thereof

Abstract

The invention belongs to the field of coal flame-retardant dust suppressants. The invention specifically discloses a nitrogen-phosphorus-silicon synergistic coal flame-retardant dust suppressant and apreparation method thereof. The nitrogen-phosphorus-silicon synergistic coal flame-retardant dust suppressant comprise the following components: 0.08 to 0.12 part of a phosphorus-based flame retardant, 0.10 to 0.14 part of a nitrogen-containing silane coupling agent, 0.01 to 0.05 part of an aldehyde compound, 100.0 to 200.0 parts of a solvent, 0.18 to 0.36 part of a silicon flame retardant, 0.1-0.4 part of a pH regulator, 83.0 to 125.0 parts of deionized water, 57.0 to 95.0 parts of alcohol, 1.0 to 2.0 parts of a natural polymer, 10.0 to 20.0 parts of a monomer, 4.0 to 8.0 parts of a pH buffer agent, 0.1 to 0.4 part of an initiator, 0.02 to 0.08 part of a cross-linking agent, 0.2 to 0.4 part of a surfactant and 0.2 to 1.0 part of a plasticizer. The preparation method comprises the following steps: grafting a nitrogen-containing silane coupling agent onto phosphorus flame retardant molecules by using an aldehyde compound, then hydrolyzing the silicon-based flame retardant, carrying outdehydration reaction between hydroxyl groups on the hydrolyzed silicon-based flame retardant and surface hydroxyl groups on the silicon-based flame retardant to obtain a nitrogen-phosphorus-silicon synergistic flame retardant, and finally organically combining the nitrogen-phosphorus-silicon synergistic flame retardant with dust suppression components such as a natural polymer, a monomer, glycerol and a surfactant in the same system through a polymer free radical polymerization reaction, so that the flame retardant has flame retardance and dust suppression properties.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant and dust-suppressing agents for coal, and in particular relates to a flame-retardant and dust-suppressing agent for coal with nitrogen, phosphorus and silicon synergy and a preparation method thereof. Background technique [0002] my country is a country that consumes a lot of coal resources. During the mining, transportation, storage and combustion of coal, a large amount of dust will be generated, which will not only cause a serious waste of coal resources, but also cause great pollution to the surrounding environment. Excessive coal dust It will also cause dust explosion, which will threaten people's life safety. At the same time, the spontaneous combustion of coal has been threatening the lives of operators and the safety of mining equipment in coal mining and storage, causing a lot of economic losses and waste of resources. [0003] At present, most of the dust suppressants and flame ...

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Problems solved by technology

At the same time, the spontaneous combustion of coal has always threatened the lives of operators and the safety of mining equipment in coal mining and storage, causing a large amount of economic losses and waste of resources

[0003] At present, most of the dust suppressants and flame retardants are used in combination in my country. Most of the flame retardants rely on imports and the cost is high.

Moreover, hard-shell dust suppressants are widely used in the market today, with poor pressure resistance. The cured layer is relatively brittle after spraying, and is easily broken by shock and wind during transportation, thus losing the dust suppression effect, and its cost is high.

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