Pyrite High-purity Concentrate Preparation And Application Of Technology Research

The mainly use of sulphide iron ore resources is to be fired to sulfuric acid in the past. Cinder can not being effectively utilized because of the lower iron and the higher sulfur and other impurities. Kunming University of Science and Technology have invented a new efficient exploitation of sulphide iron ore resources, and obtained a state invention patent. This new approach is that high purity concentrate of sulphide iron ore is produced by the reasonable process flow and the new reagent, and the concentrate is roasted to sulfuric acid and high quality iron concentrate, which can be smelted to iron directly. Thus the purpose of full use of sulfur and iron resources from sulphide iron ore is achieved.A series of mineral processing experiment research of the production of high-quality concentrate of sulphide iron ore, some grope experiment of oxidative roasting of concentrate of sulphide iron ore, and some preliminary study of comprehensive utilization of secondary resource of tailing to calcine to fire-resistant material were made in the article based on reading a lot of literature and under the guidance of the new approach.Through the lab experiment research of Weixin sulphide iron ore in Yunnan province, the high-quality concentrate of sulphide iron ore was produced: sulfur grade of 52.82%, iron grade of 44.29%, both summation of 97.11%, impurity content of 2.89%; meanwhile, the recovery rate is very high: sulfur recovery rate of 99.13%, iron recovery rate of 96.00%. high-quality concentrate of iron ore was produced through the oxidative roasting of the concentrate: iron grade of 68.58%, impurity sulfur content of 0.25%,and other impurities contents are very low. The main components of tailing: SiO₂ grade of 41.19%, Al₂O₃ grade of 35.27%, is basically the same to kaolin and its physical properties such as brightness, density, hardness, and with the highly decentralized nature are similar to the kaolin's. The fire-resistant material of A1₂O₃—SiO₂ type can be made by calcining.