Dry coal preparation technology and equipment were selected for whole grain grade

First, dry coal preparation scope of application

① Coal separation in cold, dry and water shortage areas

(2) Separation of non-stick coal, lignite and other easily slime coal

③ Steam coal, injection coal gangue removal desulfurization, increase calorific value

(4) Pre-discharge gangue of coking coal preparation plant

(5) Discharging gangue of raw coal in coal blending system

(6) Discharging gangue of raw coal in coal yard and power plant

Two, the main characteristics of dry coal preparation

(1) Less investment, short construction cycle, fast production. The technology is simple, no workshop can be built, and the investment is only 1/4-1/5 of the same type wet coal preparation plant.

② Small maintenance, stable and reliable operation, simple operation, low production cost, processing fee is only 3-5 yuan/ton.

The labor production efficiency is high, the production workers are few, generally can reach 100 tons/worker.

(4) Small occupation area, small occupation space, short construction cycle.

Third, the whole grain is selected into the new dry coal preparation process

The whole grain size is selected into the new dry coal preparation technology, modular design, flexible combination, easy to construct. The process system is mainly composed of crushing and screening module, buffer feeding module, cyclone dust collector module, bag dust collector module, blower module, induced draft fan module, block coal separation module, final coal separation module, control system module. In addition, according to the requirements of different environmental and regional users, we can customize the pre-drying module suitable for wet coal separation, and the sorting host module with heating and insulation facilities, dust collector module and blower module suitable for cold region separation.

Four, dry sorting equipment

4.1 lump coal sorting equipment

Block coal sorting equipment -FX dry separator. It is mainly composed of three parts: rotating frame, bed body and driving device. The lateral and longitudinal inclination angles of the bed can be easily adjusted. In addition, the vibration direction Angle of the driving device, the throwing Angle of the feeding end and the block Angle of the gangue discharge end can also be easily adjusted. According to the coal quality of selected raw coal, the working parameters can be adjusted flexibly to better meet the requirements of different sorting indexes.

FX type dry separation equipment has large capacity per unit area, long movement time of medium coal and gangue on the bed surface, sufficient separation, not easy to carry coal, and good separation effect. The feeding range is wide and can reach 120-0mm. When the final coal amount in raw coal is less than 15-20%, it can be directly selected without classification, which is conducive to the simplification of the process. In addition, it has strong adaptability to the external water of raw coal. When the external water is 9-11%, it can also carry out effective sorting. This equipment is more suitable for lump coal separation.

4.2 Final coal separation equipment

MFX dry coal separator is mainly composed of bed body, vibration motor and hanging device. The Angle of the bed surface is adjusted by hanging wire rope. In addition, the vibration force of the vibration motor is carried out by adjusting the Angle between the eccentric blocks. According to the coal quality of selected raw coal, the working parameters of dry separator can be adjusted flexibly to better meet the requirements of different sorting indexes.

This series of dry separation equipment has the advantages of simple manufacture, low processing and running cost and easy installation.