Process for carrying out quality improvement on coal raw material containing low-rank coal by using stamp-charging coke oven

Abstract

The present invention discloses a process for carrying out quality improvement on a coal raw material containing low-rank coal by using a stamp-charging coke oven. The process comprises: (1) crushing low-rank coal, mixing the crushed low-rank coal and an auxiliary agent to form a low-rank coal raw material, mixing the obtained low-rank coal raw material and a crushed non-low-rank coal raw material to form a raw material coal, and carrying out stamp-charging molding on the raw material coal by using stamp-charging equipment, wherein the low-rank coal is one or a plurality of materials selected from medium-rank coal, high-rank coal and medium-high-rank coal; and (2) pushing the molded raw material coal into a coke oven, carrying out quality improvement, and collecting the overflowed crude coal gas, tar and crude benzene mixture while obtaining the byproduct coke, wherein the quality improvement temperature is controlled at more than 800 DEG C, the time is not less than 15 h, and the auxiliary agent is an organic binder with air isolated dry distillation weightlessness of less than 50% at a temperature of 850 DEG C. According to the present invention, the process that the coal raw material containing the low-rank coal is subjected to quality improvement by using the stamp-charging coke oven is used, such that the problems of low existing stamp-charging coke oven utilization rate and excess coking industry production capacity are solved, and the problem that the application of the low-rank coal is limited due to no large-scale industrial equipment is solved.

Description

technical field

[0001] The invention relates to a process for improving the quality of low-rank coal, in particular to a process for upgrading coal raw materials containing low-rank coal by using an existing tamping coke oven, and belongs to the technical field of upgrading and transforming low-rank coal. Background technique

[0002] Coal is the main energy source in my country, accounting for about 70% of the primary energy structure. In the long process of geological evolution, the formation of coal is affected by many factors, resulting in various types of coal. According to the structure and composition, coal is divided into three categories: lignite, bituminous coal and anthracite. Bituminous coal is divided into low-metamorphic bituminous coal and medium-metamorphic bituminous coal. Low-metamorphic bituminous coal is also called sub-bituminous coal, which is collectively referred to as "low-rank coal" together with lignite. . Low-rank coal is the product of the init...