Calculation of the value of manganese ore raw materials

Abstract

The variety of the types of manganese ore raw materials used in ferroalloy production causes the development and improvement of approaches to their metallurgical evaluation. The calculation methods are based on the chemical composition of the raw materials. The most widely used method of determining the quality of manganese ores and concentrates from their chemical compositions [1] also takes into account the manganese, iron, and phosphorus contents and the amount and composition of gangue. As a result, it can estimate the possible degree of manganese reduction from statistical formulas derived for the manufacture of high-carbon ferromanganese and silicomanganese. For metallurgical evaluation, we chose promising manganese ore materials located in various deposits in Russia, Ukraine, and the Republic of South Africa (Table 1). The metallurgical evaluation performed according to the statistical procedure in [1] demonstrates that these materials can be used for the manufacture of both high-carbon ferromanganese and silicomanganese. The main quality indices ( KS is the phosphorus content availability of the ore, RO is the amount and composition of gangue, MF is the specific iron content in the ore) for the manufacture of carbon-containing ferromanganese are given in Table 1. The higher coefficient KS , the higher the availability of the raw materials in terms of a phosphorus content and the higher the amount of phosphorus manganese ore raw materials to be added to these materials. The sign minus before the index indicates that an alloy cannot be made with a given phosphorus content without adding high-quality raw materials with a low phosphorus content.