1200×3000 coal grinding ball mill performance parameters

The 1200 x 3000 coal ball mill, a medium-sized pulverizing machine, demonstrates unique performance advantages in coal processing. Its compact design, with a cylinder diameter of 1.2 meters and a length of 3 meters, coupled with a reasonable rotational speed of 36 rpm, allows efficient processing of medium-hardness raw coal. This wet grate-type ball mill utilizes an edge drive and a 55kW motor, making it particularly suitable for continuous coal pulverization. Its 3.5-ton steel ball loading capacity and processing capacity of 1.6-5 tons/hour ensure grinding efficiency while also enabling adjustable discharge particle size (0.074-0.4mm) to meet the coal fineness requirements of various combustion equipment. This structural design allows the equipment to withstand coal impact while separating coarse and fine particles through the grading liner, providing uniform fuel for subsequent combustion.

This ball mill demonstrates several key technical advantages in coal pulverization operations. The drum rotates at a steady 36 rpm. Combined with the stepped liner design, the steel balls form an ideal drop trajectory, effectively impacting and grinding the coal. In terms of processing capacity, the equipment can produce 1.6-5 tons/hour of pulverized coal, provided the feed size is ≤25 mm. The fineness can be controlled within a range of 0.074-0.4 mm by adjusting the baffle opening, fully meeting the fuel requirements of power plant boilers and industrial kilns.

The power system is driven by a 55 kW motor and a peripheral gear transmission, achieving stable operation and reducing specific energy consumption by approximately 15% compared to similar equipment. The 3.5-ton high-chromium alloy steel balls (Ø60-Ø90 mm) contained within the drum are specially formulated to effectively resist the abrasion of coal gangue, ensuring a liner life of over 8,000 hours. A forced discharge mechanism at the discharge end, combined with a screw conveyor, increases pulverized coal discharge efficiency by 30% while preventing over-grinding. The equipment weighs 12.8 tons and is supported by rolling bearings. It has a small starting torque and is easy to maintain, making it particularly suitable for the pulverized coal preparation needs of small and medium-sized coal-fired enterprises.