Product Details
The Straight-Cylinder Energy-Saving Overflow Ball Mill is a key wet grinding equipment in the field of mineral processing and material grinding, categorized as grinding equipment.Aiming at the problems of unreasonable cylinder structure, high energy consumption and insufficient product particle size uniformity of traditional overflow ball mills, it realizes the coordinated optimization of grinding efficiency improvement and energy consumption reduction by optimizing the straight-cylinder design and energy-saving transmission system. It is especially suitable for fine grinding and regrinding operations with high requirements on product particle size, and is widely used in metal ore, non-metallic ore and chemical raw material processing fields.
The main body of the equipment adopts an integral straight-cylinder structure, and the cylinder is made of high-strength low-carbon alloy steel rolled and welded, which has good rigidity and fatigue resistance and can bear the load caused by long-term high-speed rotation. The inner wall of the cylinder is paved with high-wear-resistant alumina ceramic liners or high-chromium cast iron liners. Among them, the ceramic liners have the characteristics of light weight and excellent wear resistance, which can extend the service life of the equipment by more than 40%.
The transmission system adopts a high-efficiency permanent magnet synchronous energy-saving motor combined with a hard-tooth surface reducer, with a transmission efficiency of over 96%, and the energy consumption is reduced by 18%-25% compared with traditional motors. The feeding system adopts a screw feeder, which can realize continuous and uniform feeding of slurry, avoiding unstable grinding quality caused by feeding fluctuations; the discharge method is natural overflow, and the product particle size is accurately adjusted by controlling the cylinder speed and slurry level. The equipment specifications cover various models from φ1200×2400 to φ4200×6000, and the single equipment production capacity ranges from 5t/h to 120t/h, which can match the production needs of different scales. In addition, the equipment is equipped with an independent lubrication system and cooling system to ensure the long-term stable operation of transmission components and reduce downtime due to faults.
The Straight-Cylinder Energy-Saving Overflow Ball Mill takes "impact-grinding-overflow classification" as its core working process. The motor drives the straight-cylinder to rotate at a constant speed through the reducer. The grinding media (steel balls or steel segments) filled in the cylinder are lifted to a specific height with the rotation of the cylinder under the combined action of centrifugal force, gravity and friction, and then fall in a parabolic trajectory, producing a strong impact crushing effect on the slurry continuously entering from the feeding end. At the same time, the rotation of the cylinder drives the grinding media and slurry to form a spiral movement along the axis of the cylinder, causing extrusion and grinding between the grinding media and between the grinding media and the liner, further grinding the ore particles.
Since the cylinder is arranged horizontally and the discharge end is equipped with an overflow port, the ground slurry moves slowly to the discharge end under the action of feeding pressure and the thrust generated by the rotation of the cylinder. When the slurry level reaches the height of the overflow port, the fine-grained slurry that meets the particle size requirement is discharged by natural overflow and enters the subsequent classification or separation equipment; while the coarse-grained slurry that does not meet the particle size requirement continues to be ground in the cylinder, forming an "internal circulation grinding" mechanism. The particle size distribution of the product can be accurately controlled by adjusting the ratio of grinding media, cylinder speed and feeding flow to meet different process requirements.
