Sustainable Mining and Metallurgy

This paper proposed an intelligent control system for single-point breaking shell and feeding, which solved the problem of sticking during the breaking shell process by adjusting the depth of the shelling hammer, and reduced the labor intensity of workers to maintain the aluminum electrolytic cell. The intelligent breaking shell and feeding control system is composed of “digital” intelligent breaking shell and feeding system+“precise feeding control” process control algorithm intelligent slot control system+distributed industrial Ethernet voice partition broadcast system. The intelligent optimization of the shelling cylinder, the setting of the lower limit position of the shelling hammer, the control and management of the breaking shell depth, the balance strategy of the feeding amount of the tank control system and the control strategy of the alumina concentration were introduced. The system was applied to a 500kA series electrolytic cell of a large aluminum electrolysis company. The results show that after the installation of the intelligent shelling and blanking system, the number of sticking is reduced by 70%, the alumina concentration of the electrolytic cell is reduced by 0.04%, the cathode voltage drop is reduced by 2mV, the average voltage is reduced by 5mV, the current efficiency is increased by 0.31%, and the DC power consumption is reduced by 58kW·h/t.The energy saving effect is remarkable.