Device and method for sintering iron ore and internally separating carbon dioxide

A carbon dioxide and iron ore technology, applied in the direction of reducing gas emissions, can solve problems such as waste, achieve long residence time, high flow rate, and reduce the effect of greenhouse effect

Inactive Publication Date: 2017-05-17
SOUTHEAST UNIV
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Problems solved by technology

At the same time, the by-product of blast furnace ironmaking process is blast furnace gas, which accounts for about 88.7% of the combustible waste gas emitted by iron and steel enterprises. It is a great waste to discharge this part of gas directly without any use. It is the key to energy saving and consumption reduction in iron and steel enterprises

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  • Device and method for sintering iron ore and internally separating carbon dioxide

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Embodiment Construction

[0021] The present invention sinters iron ore and inherently separates CO 2 The device of the method is composed of a raw iron ore reduction reaction fluidized bed 1 and a reduced ore oxidation reaction fluidized bed 2. Raw iron ore reduction reaction fluidized bed 1 is composed of raw iron ore reduction reaction chamber 1-3, reduction reaction chamber transition section 1-4, reduction bed riser 1-6, carbon dioxide cyclone separator 1-8, and feeding pipe 1- 7. Consists of overflow tank 1-5, first heat exchanger 1-1 and feeder 1-2. The lower end of the reduction bed riser 1-6 is connected to the original iron ore reduction reaction chamber 1-3 through the reduction reaction chamber transition section 1-4, and the upper end of the reduction bed riser 1-6 is connected to the upper end of the carbon dioxide cyclone separator 1-8 The lower end of the carbon dioxide cyclone separator 1-8 is connected to the overflow tank 1-5 through the feeding pipe 1-7, the lower end side of the o...

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Abstract

The invention discloses a device and method for sintering iron ore and internally separating carbon dioxide. Original iron ore powder and blast furnace gas enter an original iron ore reduction reaction chamber for reaction, and reduced ore powder, H2O and CO2 are obtained; reduced ore powder enter a reduction ore oxidation reaction chamber for reaction; air is injected into the reduction ore oxidation reaction chamber; the reduced ore powder and air are oxidized at the high temperature; a large amount of heat dissipated through the oxidation reaction is transferred to the original iron ore reduction reaction chamber through a heat exchanger to provide heat for reduction reaction; CO2 is separated from reduced ore through a separator and captured; and sintered ore produced from the oxidation reaction chamber is discharged through a deslagging outlet.

Description

technical field [0001] The invention involves sintering iron ore and separating CO 2 The method and device, especially relate to a kind of utilizing heat exchange between double fluidized beds to sinter iron ore and separate CO 2 Method and apparatus for heating. Background technique [0002] In addition to natural causes, climate warming is also affected by the massive emission of greenhouse gases from the use of fossil fuels during the industrial revolution over 250 years ago. The "Copenhagen Agreement" passed in December 2009 insists on the principle that developed countries implement mandatory emission reductions and developing countries take voluntary mitigation actions. Due to the rapid growth of greenhouse gas emissions in developing countries, there is increasing pressure to participate in commitments to reduce or limit greenhouse gas emissions. The iron and steel industry is based on carbon metallurgy, and CO in the production process 2 Emissions account for 5% ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
CPCY02P10/122C22B1/16
Inventor 陈时熠虞然向文国
Owner SOUTHEAST UNIV
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