Оцінка металургійної цінності марганцевої сировини

Abstract

Samples of manganese ores of various chemical and fractional compositions, which are widely used nowadays in the production of manganese ferroalloys at domestic enterprises have been investigated. These include samples of manganese ores from the deposits in Georgia, Brazil, Australia and Ghana. Comprehensive studies of the physical and chemical properties and metallurgical value of manganese raw materials from various deposits, used in the production of ferroalloys in ore-reducing furnaces of uprated power, have been carried out. Return to production of concentrate products of raw materials and wastes of ferroalloy production, the use of which in metallurgical processing without preparation and agglomeration is impossible, have been considered. The results of comparative analytical studies of domestic and foreign manganese ore raw materials are presented. The requirements for quality indicators of manganese ores and concentrates according to the regulatory documents of different countries have been compared. Metallurgical properties and kinetic regularities of recovery of the samples of manganese raw materials from various deposits have been investigated. The optimal share of the use of imported raw materials in the charge mixture for the production of manganese ferroalloys in relation to the required phosphorus content in them has been estimated. In accordance with the standard methods in generator gas atmosphere, studies have been carried out to determine the reducibility and temperature of the onset of manganese ores softening. The recoverability has been determined by the weight loss of the sample by the gravimetric method and controlled by chemical analysis