A ball mill control method

A control method and ball mill technology, applied in the direction of computer control, program control, general control system, etc., can solve the problems of long lag time, swelling, non-linear factors and other problems in the ball milling process, so as to ensure the particle size and work efficiency of the mill overflow ore. Efficiency, reducing the impact of model errors, avoiding uncertain effects

Active Publication Date: 2018-02-02
华楚智能科技(湖南)有限公司
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Problems solved by technology

One is manual control, which is greatly affected by the operator, the effect of grinding is unstable, and it is easy to cause "swelling" accidents
The other is to obtain the corresponding ore feed and water feed through the PID control method according to the deviation of the overflow particle size, but the lag time of the ball milling process is long, there are nonlinear factors, and there is coupling between the control variables. The control system is not working as expected

Method used

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Embodiment Construction

[0018] The process flow chart of ball mill grinding is as follows figure 1 shown. The grinding circuit of the ball mill is mainly composed of an overflow ball mill, a pump pool, a hydrocyclone classifier and other equipment. The ore enters the ball mill through the feeder, and at the same time, the feed water flows into the ball mill inlet. The ore is ground in the ball mill to form a slurry that enters the pump pool, and is lifted by the pump to the hydrocyclone classifier. Classified fine-grained pulp is sent to subsequent processes such as flotation, and the coarse-grained pulp is returned to the ball mill for grinding again.

[0019] In the present invention, the actual feeding speed is measured by a belt scale, the actual feeding water flow is measured by a flow meter, the actual feeding speed and the actual feeding water flow are controlled, and the overflow particle size of the grinding is obtained by a particle size analyzer, which is the largest in the ball mill. Un...

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Abstract

The invention discloses a bowl mill control method. Historical operation data of a ball mill is acquired including an actual ore-feeding speed, an actual water supply flow, actual milling grinding overflow granularity and an ore discharge rate. The acquired data is transmitted to an industrial control computer through an industrial network, control calculation is finished in the industrial control computer, an optimum ore-feeding speed and an optimum water supply flow are calculated, the industrial control computer sends values to a PLC through the network, and the PLC controls the actual ore-feeding speed and the actual water supply flow to be maintained consistent with a given are-feeding speed and a given water supply flow. According to the invention, the ball mill is automatically controlled, and uncertain milling grinding effects caused by uncertain factors generated by manual control are avoided; and through the control predication mode provided by the invention, the ore-feeding speed and the water supply flow can be simultaneously controlled, and the problem of mutual interference when PID control is respectively performed through overflow granularity deviations for controlling the ore-feeding speed and the water supply flow is avoided.

Description

technical field [0001] The invention relates to the technical field of ball mill grinding control, in particular to a ball mill control method. Background technique [0002] Grinding is an important process in the beneficiation process, and the ball mill is an important grinding equipment. Through the grinding of the ball mill, the minerals in the ore are separated to prepare for the next step of flotation or magnetic separation. Insufficient grinding of minerals will lead to incomplete separation of useful minerals, which will eventually affect the taste of the ore; if the minerals are excessively ground, it will produce slime, which will also affect the recovery of active ingredients. Too high or too low grinding concentration will affect the flotation effect of the next process. At present, the control methods of ball mills are mainly divided into two categories. One is manual control, which is greatly affected by the operator, the effect of grinding is unstable, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/404
CPCG05B19/404
Inventor 魏吉敏黄应龙梁军王宇星杨鸿波
Owner 华楚智能科技(湖南)有限公司
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