High-carbon ferromanganese smelting on high-base slags

Abstract

The article presents the results of laboratory trials for the smelting of high-carbon ferromanganese on highly-basic slags. Laboratory trials have confirmed that an increase in the basicity of ferromanganese production slags has a positive effect on the reduction of manganese to the metal and a decrease in the concentration of silicon in it. However, the high basicity makes the slag high-melting and tough, leading to large losses of manganese with the slag. The use of on borate fluxes solves this problem by affecting the physical and chemical properties of the final slags, which allows the process to be carried out at high basicities with the achievement of optimal technological indicators. The obtained positive results of laboratory experiments served as the basis for approbation the developed technology on a semi-industrial scale with the smelting of high-carbon ferromanganese by the flux method from the manganese ore of the «Bogach» Deposit. As a result of studying the smelting of carbonaceous ferromanganese in large-scale laboratory conditions, the possibility of converting manganese ores on highly-basic slags with appropriate regulation of the transport properties of slag to a standard metal with high technical and economic indicators was established. The best results are achieved when the CaO/SiO2 ratio in the slag is 1.8 and the boron oxide content in the slag is 0.8%. It is established that under these conditions, the obtained boron-containing highly-basic slags of carbonaceous ferromanganese are not subject to slaking.

Study of phase transformations during heating of briquetted mono-charge from chromiumcontaining materials and carbon reducing agents

“…It is mentioned in [9][10][11], that silica accelerates reduction of iron oxides and chromium in chromium ores, while in [12,13] it is noted that silica retards the process of solid phase reduction by closing the ways of reducing agent feed to reaction surface between grains of chromium spinelides and reducing agent.…”

Hydrometallurgical studies on the leaching of copper from man-made mineral formations

“…The choice of processing method is determined by the composition of the feedstock, fluxes and the technologies used at the enterprises. However, to date scientifically based technologies intended to process slag and other copper production waste have not been developed [ [1], [2], [3], [4], [5]].…”

Study of Factors Affecting the Copper Ore Leaching Process

“…This property is disclosed in [12], where the adsorption mechanism responsible for the removal of Cu 2+ with final precipitation in the form of the mineral posniakite (Cu4[(OH)6SO4]•H2O) is described. Beneficiation methods for the flotation of ores of similar composition are used when copper is mainly in the sulfide form; further possibilities are to use pyrometallurgical melting methods, such as in the example of manganese ores with high calcium content [13], or vacuum separation in the example of ores of rare-earth metals [14]. Liquid extraction technology of the sulfuric acid leaching method remains the main processing method for off-balance ores and waste dumps which predominantly comprise oxidized forms of copper.…”