Mechanical Activation of the Phosphorites (Karatau Pool) by using Organic-Mineral Co-Activators for Multicomponent Mineral Fertilizers
Deficiency of mineral fertilizers in the agricultural sector for last 15–20 years has decreased. Therefore with the purpose of partial reduction of this deficiency it was developed a new polycomponent NPK fertilizer, which contains humate and vermiculite. The given fertilizer has been produced from the natural South Kazakhstan raw materials in accordance with an acid-free way. The given article contains the data and physicochemical properties of initial materials prepared on the basis of phosphorite fines of Zhanatas and Chulaktau deposits and sinter return. Characteristics of vermiculite and the internal overburden rocks formed at the mining brown coal on the Lenger deposit are represented. During the experimental research except the above-stated natural raw materials the following substances were used at manufacture of the polycomponent fertilizer: ammonia saltpeter, ammonium sulphate produced by the OJSC “Grodno-Azot”, halurgical potassium chloride produced by “Belaruskaliy” and potassium hydroxide, a chemical reagent of a grade “pure”. The given article contains the data about the chemical composition of initial raw materials and conditions of mechanical-chemical activation of the initial materials at various values of components concentration, temperature and time at the polycomponent fertilizer manufacture. The plan and research results of phosphorite’s activation with the analysis of a disperse structure of nonactivated and activated Zhanatas phosphorite are represented. The determination of nonactivated and activated phosphorites specific surface was performed with use of a device PSH-8A according to the method based on the measurement of hydraulic resistance of a powder material’s layer at filtration of an air low-pressure stream.
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