Coal gangue dump matrix improving method

Abstract

The invention relates to a coal gangue dump matrix improving method. The improved matrix is composed of a composite nutritional agent formed by mixing and processing coal gangue, fly ash, straw and sludge; the volume percentage range of each component is as follows: 40-50% of the coal gangue, 5-10% of the fly ash and 30-40% of the composite nutrient composed of straw and activated sludge; and the particle size ratio of the coal gangue is 15-20% of coarse particles, 15-20% of medium particles and 50-70% of fine particles. The coal gangue, the fly ash, the straw and the sludge with different particle sizes form the composite improved matrix according to a certain proportion, the composite improved matrix has the functions of maintaining the water content of soil and providing crop nutrients, and the situation that high-quality soil in a mining area is deficient is improved. The matrix is simple to prepare, wide in raw material source and good in waste recycling effect, and has good environmental benefits, economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method for improving the matrix of coal gangue hills, which is suitable for soil improvement in mining areas and surrounding farmlands. Background technique [0002] China is the largest coal producing and consuming country in the world. Coal gangue, as an associated resource produced during coal production and processing, is one of the most common solid wastes, accounting for about 15% of coal production. According to statistics, the accumulation of coal gangue in my country has exceeded 5 billion tons, and it is still increasing by 150 to 200 million tons every year, while the annual utilization rate is only about 60%. Except for a small part of which is used to produce building materials or use it for heating and power generation, more coal gangue is piled up around the mine, forming a gangue hill. A large number of coal gangue dumps are one of the main reasons for environmental pollution and deterioration in mining areas...

AI Technical Summary

Problems solved by technology

[0004] At present, the output of crop straw in my country is about 700 million tons per year. Since its main components are cellulose and hemicellulose, it is mainly used as fuel, feed, fertilizer, papermaking, construction and insulation materials, but the above technologies have not formed a large-scale Large-scale industrial utilization has caused the problem of waste of raw materials

Most of the remaining straw is disposed of by open burning, which not only wastes the biological resources, but also seriously pollutes the atmospheric environment.