Method for making bricks from coal slime based on high-sulfur coal gangue

Abstract

The invention discloses a method for producing bricks by separating coal slime on basis of high-sulfur coal gangue. The method comprises the following steps: firstly, preparing high-sulfur coal gangue into coal gangue particulate matters; adding water into the coal gangue particulate matters to prepare primary ore pulp; separating the primary ore pulp by a cyclone separator; putting upper-layer light materials obtained by cyclone separation into a first stirring tank, and adding water to prepare secondary ore pulp; secondly, obtaining lower-layer concentrated materials through stirring and centrifugal separating; carrying out screening treatment on the lower-layer concentrated materials by a concentrating table; putting sewage produced by separation of the concentrating table into a second stirring tank, and adding water to prepare triple ore pulp; thirdly, obtaining lower-layer concentrated materials through stirring and centrifugal separating; flitting the lower-layer concentrated materials by a belt filter press to prepare coal slime; carrying out compression molding on the coal slime to obtain green bricks, and performing drying and roasting treatment on the green bricks to obtain finished products of the bricks. Pyrite concentrate, pulverized coal and the coal slime which have high utilization value are separated from the high-sulfur coal gangue, and then the coal slime is used to produce the bricks, therefore, wastes are changed into valuable substances.

Description

technical field [0001] The invention relates to a method for utilizing coal gangue, in particular to a method for making bricks by sorting coal slime based on high-sulfur coal gangue. Background technique [0002] With the rapid development of the national economy, my country's coal production is also increasing year by year. It is estimated that the amount of coal in 2011 will exceed 3.2 billion tons, of which coal gangue accounts for about 15% of the output, which is accompanied by the problem of gangue accumulation and its associated environmental pollution. Such as: occupation of cultivated land, air pollution by toxic and harmful gases produced by spontaneous combustion, wind erosion dust and leaching water pollution, etc. Therefore, rational utilization of coal gangue can not only protect the environment but also utilize its rich valuable energy and resources. Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the utilization rate of existing high-sulfur coal gangue is low, and the value-added space is small. Coal powder and coal slime, and then the coal slime is directly used as a raw material for brick making after drying and roasting. The processing technology is simple, and the resource utilization of high-sulfur coal stone waste is realized.