NOUFERROUS METALLURGICAL EQUIPMENT

The resources of zinc concentrate are becoming increasingly scarce and the composition is becoming more complex as well as the chemical reaction process of sulfation roasting, using traditional metallurgical calculation methods for simulation is labor-intensive and inefficient. This article introduces the sulfurization roasting process, reaction mechanism and acidification roasting technology characteristics of zinc sulfide concentrate, and carries out detailed simulation calculation of this process using METSIM. The principle, steps, module division and process control of METSIM model creation are emphatically described. The results show that the sulfuric acid roasting of 157000t/a zinc sulfide concentrate can produce 73804.80t/a roasted sand, 62768.22t/a smoke dust, and 48734.22Nm³/h of flue gas with SO₂ content of 8.8%. 90.62% of the heat income comes from the oxidation and decomposition of sulfides, with materials such as flue gas, smoke, roasted sand,and water evaporation taking away 76.63% of the heat. This provides a detailed theoretical basis for the design and upgrading of the sulfurization roasting process, and the large-scale and super-large-scale equipment.