Flotation multi-tank liquid level control system

Abstract

The invention belongs to the technical field of mineral flotation, and particularly discloses a flotation multi-tank liquid level control system which comprises a control unit, stirring tanks connected in sequence, a plurality of stages of flotation tanks connected in series and a tailing treatment device, the stirring tanks are provided with flow meters, and any stage of flotation tank is at least provided with a liquid level meter and two intelligent adjusting pneumatic valves. The intelligent adjusting pneumatic valves in the same stage of flotation tanks are arranged in parallel, the intelligent adjusting pneumatic valves of at least the first three stages of flotation tanks in all stages of flotation tanks are connected to a concentrate processing device, the intelligent adjusting pneumatic valves of at least the last three stages of flotation tanks are connected to the former stage of flotation tank, and the control unit comprises an HMI, a PLC and a DCS monitoring computer. According to the invention, a PLC + HMI with high cost performance in the current market is taken as a core, and a double-loop redundancy control mode of circuit interlocking control is additionally adopted, so that automatic detection and cascade follow-up control of series combination of a plurality of flotation tanks are realized, and the safe, civilized and clean production problems such as leakage and leakage caused by flow fluctuation are fundamentally and effectively solved.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation, and in particular relates to a flotation multi-tank liquid level control system. Background technique [0002] At present, the flotation process of large-scale copper mines is a combination of multiple flotation cells in series, usually only for liquid level control of a single flotation cell (small PLC or liquid level controller, etc.), between each flotation cell The process flow is a cascade method, but in the control logic, there is no series cascade relationship established. Each flotation cell operates independently, and its overall correlation and coordination are not strong, and there is no linkage automatic detection operation control In addition, the liquid level controller method still has problems such as poor openness and insufficient storage space. Long-term use will face safety production risks such as difficult troubleshooting, CPU crashes, and control failure restarts. ...

AI Technical Summary

Problems solved by technology

[0002] At present, the flotation process of large-scale copper mines is a combination of multiple flotation cells in series, usually only for liquid level control of a single flotation cell (small PLC or liquid level controller, etc.), between each flotation cell The process flow is a cascade method, but in the control logic, there is no series cascade relationship established. Each flotation cell operates independently, and its overall correlation and coordination are not strong, and there is no linkage automatic detection operation control In addition, the liquid level controller method still has problems such as poor openness and insufficient storage space. Long-term use faces safety production risks such as difficulty in troubleshooting, CPU crashes, and control failure restarts.

When the normal production process is stable, it basically meets the needs of production and use, but when the process flow fluctuates greatly, it cannot handle the automatic abnormal situation well, and cannot perform advanced follow-up automatic detection and control of the flow and liquid level, and problems will occur. When adverse conditions such as running, emitting, dripping, and leaking occur, a large amount of manual intervention is usually required to solve the abnormal situation and resume normal production and operation

In addition, the problem of safe, civilized and clean production caused by abnormal conditions also requires a lot of manual aftermath treatment

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