Technical Solution for the Disposal of Solid Slag from Metallurgical Plants with Production of Abrasive Powders
This article considers a technical solution to the production of abrasive powders according to the standard ISO 11126 from copper slag and nickel slag with the use of air classification. Justification of the selection of air classifier for the process of classification of copper slag is performed. The results of laboratory studies on the effect of the consumption concentration on the quality of the separation of slag particles in apparatus with an inclined louver lattice with reverse air suction are presented. This article then discusses the dependence of the material separation boundary on the air flow rate through the classifier’s louver. Based on the theoretical calculation, an industrial apparatus with a capacity of 50 t/h on initial raw materials was developed, laboratory tests were industrialized, and the results of industrial tests were shown. Industrial testing was carried out and the results of are shown.
Keywords: granulated slag, disposal, abrasive powder, granulometric composition, consumption concentration, air classifier, screening
 Kozlov, D. Y. (2007). Blasting: A Guide for Highly Efficient Abrasive Blasting. Ekaterinburg: Phoenix, p.216.
 ISO 11126-3: 1993. Specifications for non-metallic abrasives for shot blasting Part 3: Copper slags.
 Oka, Y. and Majima, H. A. (1970). A Theory of Size Reduction Involving Fracture Mechanics. Canadian Metallurgical Quarterly, issue 2, pp. 429–439.
 Gazaleeva, G. I., Tsypin, E. F. and Chervyakov, S. A. (2014). Ore Preparation. Crushing, Screening, Enrichment. Ekaterinburg: Ural Academic Service Center, p. 914.
 Galperin, V. I. (2006). Air Classification of Bulk Materials (About One Little-Known Field Of Technology) Part 3. Methods and Apparatus. Gravity Air Classifiers. Chemical Industry Today, issue 3, pp. 33–44.
 Borschev, V. Y., Dolgunin, V. N. and Dronova, M. Y. (2005). Cascade Gravity Separation of Particulate Solids: Technological Peculiarities and Mathematical Modeling. Transactions of the State Technical University, vol. 11, issue 4, pp. 903–909.
 Barskiy, E. M. and Barskiy, M. D. (2002). Optimal Air Flow Velocities in the Gravitational Separation Processes and their Correlation with the Velocities of Rotation and Particle Deposition. Ore enrichment, issue 2, pp. 60–63.
 Shuina, E. A., Mizonov, V. E. and Misbakhov, R. S. (2015). The Effect of Transverse Inhomogeneity of Gas Flow on the Separation Curve of the Gravitational Classifier. Bulletin of Ivanovo State Energy University, issue 5, pp. 60–63.
 Ponomarev, V. B. (2015). Processing of Metallurgical Slag by Pneumatic Separation. Steel, issue 2, pp. 82–83.
 Ponomarev, V. B. (2013). Pneumatic Separation of Nickel Slag for Abrasives. International Research Journal, vol. 10–12, issue 17, pp. 69–70.
 Ponomarev, V. (2015). Dry Processing of Rock Breaking Waste. Gornyi Zhurnal, issue 12, pp. 50–52.
 Ponomarev, V. B. (2017). Calculation and Design of Equipment for Air Separation of Bulk Materials. Tutorial. Ekaterinburg: Ural University, p. 96.
 Ponomarev, V. B., Shishkin, A. S. and Kataev, A. V. (2018). Calculation of the Cascade Pneumatic Classifiers. Refractories and Technical Ceramics, issue 7–8, pp. 35–38.