Closed loop control system and closed loop control method for ball mill-cyclone group

Abstract

The invention discloses a closed loop control system and a closed loop control method for a ball mill-cyclone group and belongs to the technical field of dressing plant control. The system comprises a first flow meter, a first regulating valve, a second flow meter, a second regulating valve, an ampere meter, a first pressure meter, a second pressure meter, an electric ear, a liquid level meter, a third pressure meter, a third flow meter, a concentration meter and a controller; the output end of the first flow meter, the output end of the second flow meter, the output end of the ampere meter, the output end of the first pressure meter, the output end of the second pressure meter, the output end of the electric ear, the output end of the liquid level meter, the output end of the third pressure meter, the output end of the third flow meter and the output end of the concentration meter are respectively connected with the input end of the controller; the input end of the first regulating valve, the input end of the second regulating valve and a motor-operated switch of a standby cyclone are respectively connected with the output end of the controller. The closed loop control system and the closed loop control method disclosed by the invention have the advantages that manual operation is not needed; human cost is reduced; the degree of automation is high; all operating variables are adjusted accurately in time; the power fluctuation of a ball mil is low; the indexes of the cyclone group are qualified; production is stable.

Description

technical field [0001] The invention belongs to the technical field of mineral processing plant control, in particular to a closed-circuit control system and method for a ball mill-cyclone group. Background technique [0002] The current conventional grinding process mainly includes semi-autogenous grinding (self-grinding)-ball milling process, semi-autogenous grinding (autogenous grinding)-ball milling-Isa mill (vertical mill) process, ball mill-Isa mill (vertical mill) process, etc. Regardless of the grinding process, ball mills are mostly necessary equipment. In various grinding processes, the first mill can be a semi-autogenous mill (autogenous mill) or a ball mill, the intermediate grinding equipment is generally a ball mill, and the latter grinding equipment can be a ball mill or a fine grinding equipment such as love Sha mill or vertical mill. In industrial practice, the middle or rear ball mill generally forms a non-first-stage ball mill-cyclone closed-circuit cont...

AI Technical Summary

Problems solved by technology

There are many factors that affect the closed-circuit control system of the non-first stage ball mill-cyclone group, such as ball mill power overload causes the ball mill motor to heat up or even burn out, the liner of the ball mill is seriously worn and not replaced in time, causing the cyclone group to overflow and run rough, and the cyclone Evacuation of the feed pump pool of the cyclone group causes cavitation of the feed pump pool of the cyclone group, material loss due to runaway of the feed pump pool of the cyclone group, and excessive or low feed pressure or concentration of the cyclone group causes the cyclone group The overflow particle size is unqualified, etc.

At present, the closed-circuit control system of the non-first stage ball mill-cyclone group mainly relies on the manual operation of the operators according to personal experience, the control is not accurate and timely, and the control level is quite different, resulting in frequent production accidents. The efficiency is low, and the overflow index of the ball spinner group is unqualified

Images