High-temperature-resistant semi-coke dust suppressant and preparation method thereof

Abstract

The invention provides a high-temperature-resistant semi-coke dust suppressant and a preparation method thereof. The dust suppressant is prepared from the following components in percentage by mass: 30-60% of modified starch, 1-5% of an emulsifier, 20-50% of a film-forming agent, 1-3% of an initiator, 1-3% of borax and the balance of water, wherein the modified starch is etherified starch with high substitution degree, and is at least one of hydroxypropyl starch, carboxymethyl starch and hydroxypropyl carboxymethyl starch. The preparation method comprises the following steps: heating and dissolving a film-forming agent and water under a stirring condition; conducting cooling, adding an emulsifier, and conducting stirring for reaction; then adding an initiator for reaction, then adding modified starch for three times for constant-temperature graft copolymerization reaction, and then conducting cooling to room temperature; and finally, adding a borax solution to carry out cross-linking reaction. The prepared high-temperature semi-coke dust suppressant can resist the high temperature of 120 DEG C, and is high in adhesiveness, good in film-forming property and excellent in dust suppression effect; and the dust suppressant does not contain environmental pollutants such as heavy metals and toxic gases, is free of environmental pollution and easy to degrade, and belongs to an environment-friendly product.

Description

technical field [0001] The invention belongs to the technical field of dust suppressants, and in particular relates to a high-temperature-resistant blue carbon dust suppressant and a preparation method thereof Background technique [0002] During the transportation and storage of coal, a large number of coal particles will be scattered and coal dust will be flying. A large amount of coal dust exists in the environment, which will cause extremely serious pollution to soil, water resources, atmosphere and other aspects. For example, when coal dust enters the soil and the trace elements in the soil exceed its critical value, the soil will export pollutants to the environment, polluting other environments, and the composition, structure and function of the soil will change, which will eventually lead to Soil resources are depleted and destroyed. The existence of coal dust will also endanger human health. For example, people who live in a high-dust environment for a long time w...

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Problems solved by technology

In this invention, by preparing and adding composite gelling agent and modified straw starch, and rationally adjusting the addition ratio of each component, the addition amount of each component is reduced, achieving a good dust suppression effect and reducing the cost of raw materials; but the dust suppression The modification method of modified straw starch, the raw material of the agent, is pregelatinized starch. Although the heat resistance of pregelatinized starch is improved compared with ordinary starch, it cannot reach the heat resistance of 100 ° C. During the preparation process, in order to ensure the performance parameters such as the grindability of the semi-coke, some manufacturers even dry the semi-coke in an environment of 120°C. Dust suppressants that are not resistant to high temperatures will fail in this environment, and coal dust is difficult to Second, the dust suppressant does not have the characteristics of high bonding strength and toughness, and the semi-coke will vibrate greatly during belt transportation, so the dust suppressant with weaker strength will have a phenomenon of film damage, which will lead to dust suppression. Decreased effect

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