Firming agent for surface layer of coal and its preparation method

Abstract

This invention relates to a method for preparing a curing agent for coal surface. The formula is: poly(ethylene alcohol) 0.5-1.5 wt.%, 1% KMnO4 0.3-0.6 wt.%, starch 4-6 wt.%, 5% borax or boric acid solution 2-5 wt.%, 10% caustic soda solution 4-8 wt.%, and water. When the curing agent is sprayed or coated onto the surface of coal in cabs, a cured layer is formed on the surface of coal, thus can avoid dust pollution and dust loss during the railway transportation of coal, and has high economic benefit and environmental protection benefit for railway transportation and coal customers.

Description

Technical field [0001] The invention relates to a coal surface solidifying agent and a preparation method thereof. The solidifying agent is mainly used for railway coal transportation to prevent coal loss and environmental pollution during transportation. Background technique [0002] At this stage, China's coal is generally transported by gondola cars in railway transportation. During transportation, the turbulence caused by the roadbed, turnouts and rail facilities, coupled with the effect of wind, especially when the train enters the tunnel, due to the action of the "piston wind", it will form an instantaneous strong turbulent airflow, with fine coal on the surface The particles are blown off the car body, fall onto the road, and then are crushed by subsequent vehicles to form secondary dust with smaller particle size and higher concentration. As a result, the pulverized coal on the surface of the coal seam in the vehicle was scattered, resulting in coal loss and coal dust pol...

AI Technical Summary

Problems solved by technology

And it also produces serious pollution to the body of other vehicles passing by.

Secondly, it has a great impact on the equipment

Coal dust has seriously polluted the track bed of railway lines, aggravating the degree of compaction. In heavily polluted sections, coal dust has buried fasteners, sleeper plates and other parts, which has brought considerable difficulties to the daily maintenance of the engineering department. Serious corrosion on rails and fasteners, causing safety hazards

Due to the pollution of coal dust, the daily maintenance of signal communication equipment is very difficult

It often causes short circuit and discharge of power supply insulators, which shortens the service life and brings great inconvenience to daily maintenance operations

Third, it poses a threat to driving safety

The thickness of coal particles increases at a rate of about 20cm per month at the entrance of the tunnel. The concentration of coal dust in the tunnel is suffocating, and the visibility is less than 10m. The temperature of the working environment of the electrical equipment in the locomotive will rise, which will often cause equipment failure, reduce the integrity rate and safety degree, and seriously threaten the operation safety of the train

Fourth, it seriously deteriorates the environment for employees and passengers

A large amount of coal dust in the tunnel invaded the locomotive crew room, deteriorating the working environment of the crew, and the raised coal dust caused dust pollution to the roadside stations, crossings and other environments, especially for the public works, electricity and power supply workers who often work in the tunnel serious harm to the health of

For some ordinary vehicles that are not well sealed, coal dust flies into the vehicle, which poses a serious threat to the health of passengers

Fifth, there are potential serious security risks

However, in an environment with extremely dry natural conditions, due to rapid evaporation, frequent spraying, time-consuming and labor-consuming, and a large amount of water, not only the cost is high, but it is also difficult to continuously meet the requirements of environmental quality

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