Technology is presented for the utilization of dust, captured by electric filters of a cement production rotary kiln, with preparation of granulated potassium-lime fertilizer in a drum pelletizer. The binder used is an aqueous solution of potassium, prepared by mixing sinter dust with water and unconditioned granules in the ratio S:L = 1:5. The size of the dried granules is not more than 5 mm, strength in compression 1.2–1.6 MPa, and this satisfies the requirements for granulated fertilizer. With the aim of utilizing overburden chalk rocks from iron deposits of the Lebedinskii and Stoilenskii Mining and Concentration Combines granulation technology is developed for chalk as an improver for soil deoxidation. It is established that the most effective binder material is bentonite. The optimum weight of bentonite clay per ton of chalk is 2–3 kg. The granules obtained satisfy the requirements for a granulated fertilizer with respect to size, strength and moisture content.
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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 8, pp. 34–36, August, 2009.
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Il’ina, T.N., Gibelev, E.I. Granulation in technology for utilization of industrial waste materials. Chem Petrol Eng 45, 495 (2009). https://doi.org/10.1007/s10556-009-9216-x
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DOI: https://doi.org/10.1007/s10556-009-9216-x