Separation process for recycling non-fired coal from coke slag

Abstract

The invention discloses a separation process for recycling non-fired coal from coke slag. The separation process comprises the following steps that the coke slag is crushed to the granularity of 1mm or below, and then a classification cyclone is used for classification operation; underflow products are fed into a spiral separator for preliminary separation, and spiral separation tailings and spiral separation concentrates are obtained; overflow products are subjected to flotation, and primary flotation concentrates and primary flotation tailings are obtained; and then ore grinding products andthe primary flotation concentrates are mixed, or the ore grinding products are independently subjected to flotation concentration operation, flotation reagents are added, then the ore grinding products and the primary flotation concentrates are fed into flotation equipment, and final concentrates and flotation tailings are obtained after separation of the flotation equipment. According to the process method, the non-fired coal can be recycled from the coke slag, the process flow is simple and reliable, the adaptability to feeding property changes is high, and the operation cost is low; and compared with a chemical recycling process, the treatment capacity is high, the separation efficiency is high, environmental pollution is avoided, and the economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of coal preparation and recovery in coal mines, in particular to a sorting process for recovering unburned coal from coke slag. Background technique [0002] Coke slag is the residue that ash deposits on the heating surface of the blast furnace when the raw coal is burned at high temperature, and then discharged from the blast furnace. A few decades ago, it was usually classified as garbage and was not fully utilized. In today's era of rapid economic development, environmental protection issues have become increasingly prominent, and turning waste into treasure has become the only way for an energy-based society. Coke slag has been widely used as a material on the roof of buildings because of its good thermal insulation, fireproof and moisture-proof properties. At the same time, the coke slag can also be used in the manufacture of hollow plaster-free blocks and the preparation of coke slag concrete. [000...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide an effective and feasible sorting process that can recover unburned coal from coke slag, and solve the problem of waste of coal resources caused by unburned coal in coke slag that cannot be recycled.

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