Process for preparing coking charging coal from coking mixed coal

Abstract

The invention discloses a process for preparing coking charging coal, and various kinds of coking coal conveyed from coal storing apparatuses are separated; if the fineness of the coal satisfies the requirement, the coal is directly conveyed to a coal blending apparatus for storage through an electro hydraulic reverse turning bed without crushing; if the fineness of the coal does not satisfy the requirement, the kind of coal is turned by the electro hydraulic reverse turning bed and is crushed by an newly established crushing apparatus, and after crushing, the coal is conveyed to the coal blending apparatus for storage; various kinds of coking coals of different finenesses are automatically blended into a mixed coal in the coal blending apparatus according to the coal blending ratio determined by a coal blending test, and after mixing by a coal mixing apparatus, the charging coal which meets the fineness requirement is conveyed to the top of a coal tower for coking production of a coke oven; compared with the prior process for preparing the charging coal in domestic coking enterprises with a first coal blending step and a second crushing step, the process provided by the invention with a first crushing step and a second coal blending step without influencing the production condition contains the following steps: crushing various kinds of coal into different finenesses, blending coals, mixing coals and conveying the coals to the top of the coal tower for coking production in the coke oven. The invention has the advantages of uniform distribution of charging coal particle fractions, improved charging coal pile proportion, obviously reduced over crushing of coking coal and fat coal, thereby improving production capacity of the coke oven as well as stabilizing or improving the quality of the coke.

Description

technical field [0001] The present invention mainly relates to the technical field of coking coal treatment in coking plants, especially the process of preparing coking coal for furnace charging. Coal blending is the process of preparing furnace coal. Background technique [0002] In my country's coking production, the production process of most existing coal preparation workshops is: coking coal with a moisture content of about 10% and coal fineness (the percentage of coal materials with a particle size of <3mm in the coal material to the total coal amount) 60% After being transported into the coking plant, it is unloaded by the unloading device and transported to the coal yard by the belt conveyor for storage according to the coal type for homogenization of coal quality. The coking coal stored in the coal yard is sent to the coal blending section through the reclaiming equipment and the belt conveyor to prepare blended coal according to the coal blending ratio determine...

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is: aiming at the technical problems existing in the existing process, the present invention provides a new crushing device under the condition of not affecting the production, changing the original crushing facility into a mixing device for each single coking coal according to the The coal type and coal quality are pulverized to different pulverization fineness and then sent to the coal blending device. Some coal types whose fineness meets the requirements can be directly sent to the coal blending device without pulverization, that is, the process flow of coal blending after pulverization

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