Production of Microelement-Containing Superphosphate on the Basis of Thermoconcentrate and Secondary Raw Materials of Hydrometallurgy

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D. A. Uktamov, Z. T. Usmanova

Abstract

To date, nitrogen, phosphorus and potassium fertilizers in agriculture are produced and widely used in our republic. However, the production of microelement-containing fertilizers (MCF) has not been carried out. The main problem of production of MCF is the lack of raw materials. One of the ways to solve this problem is to use the secondary raw materials of the hydrometallurgical industry. In the Almalyk Mining and Metallurgical Combine, the secondary raw materials, containing a trace element, are obtained during the processing of molybdenum. This material can be used as a component for obtaining a microelement containing fertilizer. The aim of the work is to obtain microelement-containing fertilizers based on the secondary raw materials of the hydrometallurgical industry and powdered superphosphate, obtained by decomposing the thermoconcentrate at different rates of sulfuric acid. The secondary raw materials of the hydrometallurgical industry were used to produce microelement-containing fertilizers. Optimum conditions for granulation of powdered superphosphate obtained by decomposition of phosphorite thermoconcentrate at various sulfuric acid standards with secondary raw materials of the hydrometallurgical industry are determined. The optimal conditions for the production of trace elements containing fertilizers are established: the stoichiometric norm of sulfuric acid for decomposition of the thermal concentrate is 40-100%; Humidity at granulation is of 13-15%; the content of microelements in superphosphate is 0.5-2.0%. Preparation of micronutrient-containing fertilizers based on the secondary row materials of hydrometallurgy, This suitable for using in agriculture.

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