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A kind of smelting reduction metallurgy method
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A reduction furnace and reducing agent technology, applied in the field of smelting reduction metallurgy, can solve the problems of increasing production cost, increasing equipment investment and energy consumption, and increasing production process by adding pellets into the furnace, so as to reduce production cost and save equipment. Effects of inputs and energy consumption
Inactive Publication Date: 2017-01-18
郭民 +1
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[0015] The first purpose of the present invention is to solve the high energy consumption deficiency of the existing smelting reduction process. The core problem is how to solve the heat transfer process of material melting (needing oxygen to maintain combustion and releasing heat) and the mass transfer process of metaloxide reduction ( need to have a sufficiently high concentration of CO gas) the contradiction between
The second purpose is to solve the problem that the existing process adopts pellets into the furnace to increase the production process, increase equipment investment and energy consumption, and increase production costs.
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Abstract
The invention belongs to the field of ferrousmetallurgy, and in particular relates to a smelting reduction metallurgical method. The smelting reduction metallurgical method is characterized in that smelting of materials and reduction of metallic oxides are independently completed in different furnaces / thermal equipment in a manner of feeding powder into a furnace, and the two processes are not interfered with each other, namely, the materials are heated and smelted into a liquid melt in a heating and smelting furnace at first; the liquid melt flows into a reduction furnace; a reducing agent is injected into the melt in the reduction furnace; and the metallic oxides are reduced into metals. The smelting reduction metallurgical method disclosed by the invention has the outstanding advantages that heating and smelting of the materials and reduction of the metallic oxides are realized in the different furnaces / thermal equipment; heating and smelting of the materials can be completed under oxidizing atmosphere; CO and H2 generated by reduction can be burnt completely; heat generated by combustion of a fuel is sufficiently utilized; combustible gas does not exist in discharged flue gas; and compared with that of other processes, the energy consumption of the method is reduced by 30% and above.
Description
technical field [0001] The invention belongs to the field of iron and steel metallurgy, in particular to a melting reduction metallurgy method. Background technique [0002] In the 1960s, Professor Eketorp of Sweden proposed the theory of iron ore smelting reduction. The basic theoretical basis is as follows: [0003] Fe 2 o 3 +3C=2Fe+3CO ΔH 1700 =109Kj / mol [0004] 3CO+3 / 2O 2 =3CO 2 ΔH 1700 =-201Kj / mol [0005] The total enthalpy of the two reactions is -92Kj / mol. [0006] Physical means, if iron orepowder is reduced with fixed carbon, CO will be generated; if all CO generated is oxidized into CO 2 , can achieve heat balance and achieve the theoretical minimum energy consumption per ton of molten iron. [0007] In order to achieve this goal, from the 1960s to the 1980s, there were nearly 40 programs and technologies all over the world. The common point of these schemes is that coalpowder is used as reducing agent / fuel, oxygen / oxygen-enriched air is used as oxi...
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