Sustainable Mining and Metallurgy

This article introduced the process control of the gas roasting start-up technology, and compared the coke roasting technology and the gas roasting technology from the aspects of roasting effect and cost-effectiveness. The comparison results show that the overall uplift of the coke roasting electrolytic cell is smaller than that of the gas roasting electrolytic cell; the initial heat-up rate of coke roasting electrolytic cell is somewhat faster with a bit poorer controlability relatively while the heat-up rate of gas roasting electrolytic cell is slightly slower with a constant temperature rise, allowing for easy control; there is no obvious differentce in cathode steel bar temperature, furnace bottom plate temperature and melt zone shell temperature between the two roasting methods; in terms of cost-effectiveness and environmental protection, gas roasting of a single electrolytic cell saves about 13,000 yuan compared with coke roasting, with which the energy utilization rate is higher, being conducive to carbon reduction and emission abatement, and there is no need to salvage the carbon residue after startup.