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The Working Principle and Structure of Rod Mill

2019-10-17(17:54:59) 802 2

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In this post, we're going to learn more about rod mill.

We'll cover it from two aspects:

1. Working principle

2. Structure

Let's dive right in!

1. Working Principle of Rod Mill

Rod mill is a common equipment for grinding operation in mineral concentrator, which is mainly suitable for rough grinding operation. Is through asynchronous motor reducer with small gear coupling, the surrounding big gear reduction drive under its impetus, drive the rotary rotate, cylinder body is equipped with the grinding medium - steel rods, grinding medium in a centrifugal force and friction force, under the joint action of was taken to a certain height, and then was thrown down state, material continuously by feeding into the cylinder body, by moving medium crushing, the overflow and continuous feeding force under the action of product outside, into the next process.

Rod Mill

2. Main Structure of Rod Mill

This kind of main structure mainly has 15 parts: 1. 2. Main bearing department. 3. Hydraulic jacking device. 4. High and low pressure pump station. 5. Rotating part. 6. Slow device. 7. Transmission department. 8. Jet lubrication device. 9. Intermediate shaft. 10. Discharging screen. 11. Coupling. 12. Air clutch. 13. Synchronous motor. 14. Electronic control system. 15. Air path system.

Rod mill main bearing structure adopted, for example, the totally enclosed type "joystick," since a self-aligning bearing, bearing bush runs round the high pressure oil cavity, central axis of babbitt alloy layer with a "snake" in the cooling water pipe, oil used with a combined type ZDG - 63 a high and low pressure pump station, by oil tube connected to the low pressure oil pump, bearing at the top of the bottom of return pipe and high-pressure tubing, static pressure jack-up, dynamic pressure is one of the characteristics of bearing operation.

The parts of the rotary part include the end cover of the inlet and outlet materials, the barrel, the inlet and outlet materials spiral cylinder, the rubber lining plate, the laminate, etc., and the spiral direction of the inlet and outlet materials end is opposite. The lining board of cylinder adopts wear-resistant rubber and layering, which has the advantages of wear-resistant, corrosion-resistant, shock-absorbing and noise-proof.

Transmission parts has big gear pinion shaft bearing seat belt and small gear lubrication oil, big gear put together and become, by two and a half gear installed on the cylinder discharge end flange, RPC - 4 pneumatic spray lubrication device to control the size of the gear lubrication, this device size gear grinding machine using continuous working characteristic of low speed and heavy loading and exposed drive and work, is composed of pump nozzle filter tank valve instrument and so on, can timing quantitative directional automatically to appropriate gear lubricant spray to the work surface, the gear lubrication conditions improved and extended operating life.

In addition, a pinion with oil is arranged in the lower part of the gear cover to improve the lubrication condition between gears. In the debugging, maintenance and overhaul, the slow device to drive the slow rotation and drive the disc, easy to operate, and the air clutch interlock. When the bar is added, the bar is supplemented by a bar feeder.


After learning about the working principle and structure of rod mill, we can do better in the maintenance of rod mill and make more profit in the mineral processing plant.

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