Coal moisture control method of firstly classifying crushing and then mixing

Abstract

The invention provides a coal moisture control method of firstly classifying crushing and then mixing, and relates to the moisture control method for coking preprocess. The method comprises the steps of: 1, respectively taking materials from a plurality of coal fields; 2, respectively transporting single coal dust by a belt; the method is characterized by comprising the step 3, respectively performing coal moisture control treatment on each coal material; 4, respectively feeding the single coal subjected to coal moisture control to granularity classifying equipment; 5, respectively feeding the single coarse granule coal into a grinder for crushing; 6, mixing the crushed coarse granule coal with the homogeneous fine granule coal; 7, respectively feeding the mixed single coal into a coal blending slot for coal blending by a belt transporter; and 8, feeding the mixed coal subjected to coal blending into mixing equipment into a coal bunker by the belt. The method has the advantages that: the coal moisture control and selectively crushing are performed in the process of transporting the single coal to the coal blending slot, so that the characteristics of the single coal are fully exerted; through the frequency conversion grinder, the fineness of the coal is controlled, so that an activity-to-inertia ratio of the blending coal achieves to a suitable value; and the quality of the coke is improved.

Description

Technical field: [0001] The invention relates to a method for adjusting humidity of coal before coking, in particular to a method for adjusting humidity of coal which is first classified and crushed and then mixed. Background technique: [0002] Coal humidity control is the abbreviation of furnace coal moisture control process. It is to remove part of the moisture from the coking coal material before loading the furnace, keep the moisture content of the furnace coal at a constant value, and then load the furnace for coking. [0003] Advantages of coal humidity control: [0004] 1. It can reduce the amount of waste water produced. The reduction of coal moisture can reduce the amount of residual ammonia by 1 / 3, correspondingly reduce the steam used for distilling ammonia from residual ammonia by 1 / 3, and reduce the residual ammonia by 44kg per ton of coal, and also reduce the production load of wastewater treatment equipment. [0005] 2. It can reduce the energy consumption ...

AI Technical Summary

Problems solved by technology

[0012] 2. Coal particle size composition is generally considered to be greater than 6mm as coarse grains, and less than 0.5mm as fine grains, and most of the coarse grains are inactive components, which are easy to become the crack center of coke during the coking process, which is not conducive to the improvement of coke quality