High Level Product Ferro Manganese

The effects of particle size, temperature and gas composition on low-carbon manganese ferronitride were studied by using experimental test methods such as high-temperature nitriding and X-ray diffraction analysis of vacuum resistance furnace. Industrial gaseous nitrogen is the main gas phase component of nitriding gas, which can be nitrided and oxidized by ferro manganese at the same time to generate Mn4N and MnO compounds. With the increase of nitriding temperature, the content of manganese oxide increases correspondingly. Ammonia is added to the nitriding atmosphere, so that the partial pressure of nitrogen is reduced accordingly, the equilibrium adsorption concentration is reduced, and the nitrogen content of the nitriding sample is reduced.

1.A method for preparing low-carbon ferro manganese metal with poor manganese ore powder, it is a method of using rich reserves of poor manganese ore powder, microwave heating, carbon reduction, high-temperature refining, magnetic separation and purification, direct preparation of low-carbon ferromanganese metal, without high energy consumption, serious pollution of sintering and briquetting process, through selected raw materials, crushing, fine grinding, sieve, mixing, stirring, microwave oven preheating, carbon monoxide pre-reduction, final reduction, high-temperature refining, nitrogen protection cooling, magnetic separation and purification, and finally prepare high-purity low-carbon ferromanganese metal, this preparation method has a short technological flow, The use of less equipment, can be large-scale industrial production, high yield, up to 98%, manganese content up to 75%, iron content 20%, low carbon content, < 0.5%, harmful substances sulfur content < 0.5%, phosphorus content < 0.2%, low-carbon, low phosphorus, low sulfur type, no blocking, no pollution, is a very ideal method of directly producing ferromanganese metal with poor manganese ore powder, filling the scientific research gap of this kind of technology in China.

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