Research on Siderite Ore Reducing Firing

Abstract:

It was determined that the current method of the Bakalsk mining department siderite ore preparation for blast-furnace smelting does not allow production of concentrate meeting the state-of-the-art metallurgy requirements. The most perspective method is reducing firing when a metallized product with higher iron content is obtained. It was demonstrated that implementation of this method requires the use of a three-zone shaft furnace having the oxidizing roasting zone, the reduction zone and the reduced product cooling zone. Experiments were carried out on the siderite ore reducing firing on laboratory units. The possibility in principle was demonstrated for production of the reduced product with iron content of 60 – 65% from the siderite ore. After the magnetic dressing the concentrate with iron content of 65 – 75% was obtained. It was determined that firing and reduction in hydrogen atmosphere result in the fired product reduction degree of 97 %. The possibility to produce a product suitable for blast-furnace conversion with the reduction degree of about 60% with the use of natural gas air conversion gas was demonstrated. The obtained results were used in the process development for the siderite ore reducing firing in a three-zone shaft furnace.

• Periodical: Materials Science Forum (Volume 989)
• Pages: 434-439
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.989.434
• Online since: May 2020
• Authors: Boris P. Yur'ev*, Vladimir A. Gol'tsev, Vyacheslav A. Dudko
• Keywords: Atmosphere, Composition, Converted Gas, Hydrogen, Iron Content, Metalized Iron Product, Natural Gas, Process, Reduction Degree, Research, Shaft Furnace, Siderite Ore, Specific Consumption

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