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| Development of Technology for Processing Zinc Cakes Based on the Use of Petroleum Coke
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Khojiev Sh.T., Saidova M.S., Mirzajonova S.B., Ibrokhimov H.X., Ismatov Sh.O'.
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Abstract:
The article discusses the method of processing cakes of zinc plants with petroleum coke. It has been established that the middling product of the greatest interest from the standpoint of the complexity of the use of raw materials is zinc cakes obtained after leaching of calcined zinc concentrate, the yield of which is from 25 to 45% by weight of the cinder. It has been revealed that one of the most promising methods for processing cakes is the Waelz method, as a result of which zinc passes into sublimates. It was revealed that the main mass of sulfates, zinc carbonates, zinc hydro-zincates decomposes to oxide during the process of Waelzization, which is further reduced to metal when the material is heated. It has been determined that one of the most important characteristics of metallurgical and petroleum coke is its carbon content, which is usually 83-90%. Research has determined that the high ash content of the coke used leads to its high consumption and a decrease in the parameters of the Waelzization process. It has been established that the ash content of petroleum coke (0.39%) is much lower than the ash content of metallurgical coke (9-12.7%) and its use in the Waelz process can improve the process performance in terms of reducing fuel consumption. The comparison of the chemical, mechanical and physicochemical properties of metallurgical and petroleum coke, as well as the results obtained during the Waelzization of zinc cakes with the addition of petroleum coke to the charge, led to the conclusion that it is possible to completely or partially replace metallurgical coke with petroleum coke of the Fergana Oil Refinery.
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