NOUFERROUS METALLURGICAL EQUIPMENT

High iron tin ore is one of the important tin ore resources. The concentrate after magnetic separation contains 0.93% Sn and 0.93% Fe, In order to realize the efficient utilization of this type of concentrate, the chlorination reduction roasting process was adopted, the reaction temperature is 1000℃, and the experimental ratio is controlled. When the coke powder (anthracite), calcium chloride and lime were 6%, 5% and 2.7% respectively, 96.88% of tin in the concentrate volatilized as SnCl 4 gas, and tin could be recovered by electrowinning after water adsorption; the content of Sn in the roasting slag decreased to 0.029%, and other metals such as Fe， Zn and Cu, the content of are 63.90%, 0.062% and 0.12%, which can be directly sold as iron ore. At the same time, the feasibility of treating this type of minerals by carbothermal reduction sulfurization roasting was studied. Under the reaction conditions of 1150℃ and adding 6% coke powder and 4% pyrite respectively, more than 95% of tin in the raw material can be volatilized in the form of SnS to achieve the purpose of recovering tin.