Process for refining coal

Abstract

The invention belongs to the technical field of coal refining and in particular relates to a process for refining coal. The process comprises the following steps: performing preliminary treatment on mined raw coal, removing gangue in the coal, and screening the raw coal into particles of different grades by utilizing a screening machine; performing coal washing and separation on the raw coal by utilizing coal mine washing equipment so as to obtain clean coal with particle uniformity and high quality; performing dehydration treatment on the obtained clean coal by utilizing a dehydration plant,so that the quality of the clean coal is ensured; drying the dehydrated clean coal by utilizing heat energy, detecting ash and sulfur in the dried clean coal, packaging and storing the qualified cleancoal, and performing coal washing on coal detected to not reach the standard again. According to the process disclosed by the invention, the clean coal can be rapidly prepared, and the prepared cleancoal is low in ash content and high in quality.

Description

technical field [0001] The invention belongs to the technical field of coal refining, in particular to a coal refining process. Background technique [0002] Raw coal is washed to remove the gangue in the coal and become high-quality coal suitable for special purposes, that is, clean coal. Clean coal can be divided into coking clean coal for smelting and other coking clean coal. Coking clean coal for smelting, its particle size is divided into three types: less than 50, 80, and 100 mm, and its ash content is less than or equal to 12.5%. The ash content is between 12.5% ​​and 16%, referred to as other clean coal. At present, my country's clean coal production process is complicated, with many processes and high cost. At the same time, when my country's clean coal is produced, the coal washing equipment has low removal efficiency for the ash and sulfur in the coal, and it often requires multiple coal washing operations to remove the ash and sulfur in the coal. The reduction ...

AI Technical Summary

Problems solved by technology

At present, my country's clean coal production process is complicated, with many processes and high cost. At the same time, when my country's clean coal is produced, the coal washing equipment has low removal efficiency for the ash and sulfur in the coal, and it often requires multiple coal washing operations to remove the ash and sulfur in the coal. The reduction of ash and sulfur content reaches the standard of clean coal, and the processing cost is high

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