Device and method for smelting iron by gasifying cold bonded coal-containing iron powder pellets
A technology of pelletizing and iron powder, which is applied in the fields of smelting reduction ironmaking and coal chemical industry, can solve the problems of inability to directly use powder ore and high consumption
Inactive Publication Date: 2010-11-03
田原宇
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Problems solved by technology
The advantage of the Corex process is that coal is used without coke, and there is no coke oven pollution. The disadvantage is that fine ore cannot be directly used, and the consumption is high
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[0015] Below in conjunction with accompanying drawing, the present invention is described in detail: the device of cold solidification coal-containing iron powder pellet gasification ironmaking, it is made of upper feed inlet (1), preheating solid-state reduction gasification section (3), smelting reduction section (6), slag iron separation section (8), upper air inlet (4), lower air inlet (7), water cooling jacket (5), siphon type iron outlet (9), emergency treatment outlet (10), outlet It consists of a slag outlet (11), an oxygen-enriched air inlet (12), an induced draft fan (13), a gas outlet (14), and the like. It is characterized in that the preheating solid-state reduction gasification section (3), the smelting reduction section (6) and the slag-iron separation section (8) are sequentially designed in the same furnace of the shaft furnace (2) from top to bottom, and are lined with thermal insulation lining; preheating The top (3) of the solid-state reduction gasification...
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The invention discloses a device and a method for smelting iron by gasifying cold bonded coal-containing iron powder pellets. The cold bonded coal-containing iron powder pellets are used as raw materials, coal gasification and direct reductive iron making are performed by sectional air inlet and partial hot coal gas return in a shaft furnace, and metallurgical coke is not needed. The coal-containing iron powder pellets are coldly pressed and molded by adopting binder compounded by organic binder and inorganic binder, and the coal-containing iron powder pellets are directly charged into a furnace to perform pre-heating and drying enhancement, dry distillation, gasification, pre-reduction and melting reduction to produce molten iron. The middle lower part of the shaft furnace is provided with two to three rows of air inlets, the lower air inlets supply high-temperature air by adopting partial hot coal gas return and preheated oxygen-rich air combustion, and the upper one to two rows of air inlets supply preheated oxygen-rich air; and the top of the shaft furnace is provided with a coal gas outlet, while the bottom is provided with a slag outlet and a siphon type molten iron outlet. The invention has the advantages of full avoidance of sintering, pellets and coking plant investment due to direct utilization of fine ore and powdered coal for smelting, elimination of coking pollution, extremely low comprehensive investment, reasonable heat utilization, extremely low comprehensive energy consumption, high coal gas heat value, low pollution, low equipment fault rate, unlimited scale, easy casting and electric furnace steelmaking, short flow, low cost and easy operation.
Description
1. Technical field [0001] The invention relates to a device and method for cold-solidifying coal-containing iron powder pellet gasification ironmaking, which belongs to the field of smelting reduction ironmaking and coal chemical industry. 2. Background technology [0002] The modern blast furnace has a history of hundreds of years, and its technology has reached a fairly perfect level. However, while it is becoming more and more perfect and large-scale, it also brings problems such as long process, large investment and environmental pollution. Coking coal resources are limited in the world, and China's coking coal is also insufficient, and the pollution of the coking process is serious. China is already a big steel producing country in the world, and the output of pig iron is the first in the world. In 1995, the output of pig iron exceeded 100 million tons, and the output of coke reached 72 million tons. Not only does it consume more than 100 million tons of coking coal e...
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Inventor 田原宇乔英云
Owner 田原宇