Mining enterprises pay more and more attention to the construction of automation and realize the automation of mineral processing , which can greatly improve labor productivity, improve the recovery rate of ore dressing and concentrate grade, improve working conditions, reduce the consumption of chemicals and electric energy, and make the ore dressing production more economic and reasonable. The main processes of mineral processing are crushing, grinding, grading, sorting, concentration and dehydration, filtration, and concentrate transportation. The following is a brief introduction to the control objectives and control strategies of each process. Second, the crushing process automation solution The crushing process is the first process of the ore dressing plant. Whether the process can stabilize the normal work directly affects the subsequent operations. The crushing automation system implements the analysis and alarm of the safe working state of the crusher through the detection of oil temperature and oil level; through the detection and analysis of the working current and the ore amount of the crusher, the crusher is optimized to control the mine; The detection of the material level of the silo and the analysis of the capacity of each crusher implement the optimal balance of the work of the automatic fabric and the crusher; finally, the whole system is operated safely, stably and efficiently. After using the system, it will greatly save energy, reduce fuel consumption, improve crusher working efficiency, reduce post staffing, improve equipment safety and reliability, reduce equipment maintenance costs, and make operation simple and convenient through humanized configuration interface. Easy to manage. Process description of crushing and screening process Third, grinding classification process automation solution The automatic control of the grinding and grading process is a relatively complicated control process. We control the water addition of each watering point, the grinding concentration control of a ball mill, the overflow concentration control of the classifier, the concentration control of the cyclone, and the swirling Coordinating control of the feed pump tank liquid level and the cyclone feed pressure, and the self-optimizing control of the cyclone feed pressure, so that the particle size of the slurry reaches the process requirements, and under the premise of ensuring the particle size, Optimize the amount of mill processing. For the key process parameters of the grinding process, we use advanced control technology, combined with the company's many years of production and the rich experience accumulated by excellent operators, to develop an expert control system that optimizes the automatic control of grinding grades. The automated control of the grinding and grading process is more intelligent. Grinding and classification automatic control system to reduce energy, steel ball loss and improve the recovery of metals to improve the handling capacity of the mill, improve the passing rate classification overflow granularity, reduce labor intensity and other characteristics, mineral processing integrated automation A very important subsystem in the control system. Hematite grinding process monitoring system monitoring screen Historical trend 1 Fourth, the automatic control of the magnetic separation process Magnetic separation is one of the key links in the whole process of mineral processing. The effect of magnetic separation directly affects the metal recovery rate and concentrate grade. According to the actual situation of the site, we control the dewatering tank interface to improve the quality and reduce the tail loss, and at the same time improve the metal recovery rate and concentrate grade through the control of the strong magnetic separator. For the weak magnetic separation, the grade of the concentrate and the recovery rate are guaranteed by controlling the grinding classification system. Magnetic separation process monitoring system monitoring screen V. Concentration process automatic control system It is our control purpose to concentrate it into a certain concentration of qualified pulp and transport it to the next process while preventing the overflow water from running. There is strong coupling and strong nonlinearity between the input and output of the concentration process; one of the input changes will cause two outputs to change, and each output is related to the two inputs. We use the intelligent decoupling control technology to control the underflow pump speed and flocculant addition amount with the underflow concentration and the height of the well interface as the target value, so that the interface of the well is maintained at a certain height, and the slurry delivered to the next process is stabilized in the qualified. Within the scope. 6. Concentrate transportation control system Through the interlock control of the concentrate conveying belt, the loading automation can be realized, and the purpose of reducing the staff can be achieved. Seven, summary The above is an automatic control summary scheme for each process of the beneficiation process. The control systems of each process are connected together through a computer network, and through the integrated intelligent management of the upper layer software, an integrated automatic control system for the beneficiation process is formed. Mineral processing automation system diagram The investment in the beneficiation integrated automation system can greatly improve the economic and social benefits of the enterprise, improve the equipment technology level of the enterprise, and improve the management level of the enterprise. Through the implementation of the beneficiation integrated automation system, product output, quality and qualification rate can be improved, energy consumption can be reduced, equipment maintenance costs can be reduced, equipment maintenance time can be shortened, equipment operation rate can be improved, labor productivity can be improved, the number of post personnel can be reduced, and environmental pollution can be reduced. Wait. 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Grinding classification process description
Introduction of mineral processing automation control system
　  I. Overview