Roller grinding mill

Abstract

The invention belongs to the technical field of ore grinding and particularly relates to a roller grinding mill. The roller grinding mill comprises a base, a roller arranged on the base, a driving mechanism for driving the roller to rotate, a feeding device, a discharging device, an ore grinding medium arranged in the roller and a roller liner plate arranged on the inner wall of the roller, wherein the feeding device and the discharging device are arranged on two end heads of the roller correspondingly. The driving device comprises a motor, a reduction gear and a rotating shaft. The roller grinding mill is characterized in that the ore grinding medium is a cylindrical running pulley, and the axis of the rotating shaft and the axis of the roller are coincide; the rotating shaft is hollow, the discharging device is arranged between the reduction gear and the rotating shaft, and a hydraulic coupler is further arranged between the motor and the reduction gear. According to the roller grinding mill, the shape and the volume ratio of the ore grinding medium are changed, so that the gravity center of the ore grinding medium is made to be close to the rotation center of the roller, and the rotating speed of the roller is improved so as to increase contact opportunities of the ore grinding medium and ore; accordingly, the grinding efficiency of the ore powder process is improved, energy consumption is reduced, yields can be increased by over 40%, and energy consumption of the ore grinding medium can be decreased by over 30%.

Description

technical field [0001] The invention belongs to the technical field of grinding, in particular to a drum mill. Background technique [0002] In the field of grinding technology, ball mills have always been an indispensable equipment for ore grinding and processing. However, in practical applications, the power consumption of the ball mill is too large, the grinding efficiency is low, and the grinding quality is also uneven, and some even fail to meet the grinding requirements. . The main defects of traditional ball mills are mainly concentrated in the following aspects: [0003] 1. The metal loss of the grinding medium, that is, the steel ball as the grinding medium has ineffective collision and friction. The grinding material of the ball mill relies on a large number of steel balls of the bulk grinding medium, which cooperate with the rotation of the cylinder to continuously perform "projection motion" and pouring movement with the steel balls (the projectile is a small ...

AI Technical Summary

Problems solved by technology

[0006] c. The slow speed of the traditional ball mill reduces the number of steel balls hitting the ore, which makes the grinding efficiency low. However, if the speed is increased, the steel ball will rotate with the inertia of the drum and the grinding medium will not work, which will affect the grinding efficiency.

[0007] 2. High power consumption and low efficiency

From the perspective of physics and leverage principle, the working state of the drive is radial eccentric rotation, and the center of gravity of the material is seriously offset from the center line of the rotary shaft, which is a triangular center of gravity, with high resistance and high energy consumption.

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