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Method and device for operating a smelting reduction process

A technology of process and melting equipment, which is applied in the field of operating smelting reduction process to achieve the effect of improving reduction ability, improving energy balance and avoiding increasing pressure

Inactive Publication Date: 2011-09-28
PRIMETALS TECH AUSTRIA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Here too there is the problem that the output gas can only be used unfavorably in gas turbines or gas and steam generators due to low pressure, low calorific value and fluctuations in calorific value after mixing with residual gas from the decarbonation plant

Method used

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  • Method and device for operating a smelting reduction process
  • Method and device for operating a smelting reduction process
  • Method and device for operating a smelting reduction process

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Embodiment Construction

[0037] figure 1 A blast furnace 1 is shown, which is supplied with oxygen via a ring duct 2 . The top gas is conveyed via a top gas line 3 to a dry separator 4 and optionally also to a wet separator 5 , wherein export gas is produced from the dust-laden top gas, which is discharged via a line 6 . Utilize the pipeline 7 to the device 8 for separating carbon dioxide to transport a part of the output gas to the device 8 for separating carbon dioxide by means of a compressor 9 and a cooler 10, wherein a carbon dioxide-purified output gas (also called recovery gas) and tail gas are formed, which It is discharged through the recovery gas pipeline 11 or the tail gas pipeline 12 and 13. The exhaust gas line 13 leads to a storage device 14 for receiving the exhaust gas, wherein a calorific value balance is formed in the stored exhaust gas. The previously stored exhaust gas can now be fed to the waste heat steam generator 16 by means of the exhaust gas lines 15 a, 15 b. Here steam is...

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PUM

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Abstract

A method and a device are provided for operating a smelting reduction process, wherein at least part of an export gas from a blast furnace (1) or a reduction unit (R1) is thermally utilized in a gas turbine and the exhaust gas of this gas turbine (24) is used in a waste heat steam generator (16) to generate steam. The remaining part of the export gas is fed to a CO2 separation apparatus (8), the tail gas thereby obtained being fed to a waste heat steam generator (16) and burned for additional steam generation. According to the invention, the combustible components of the tail gas are sent for thermal utilization in a steam generator, so that the overall energy balance of the thermal use of the export gas is improved. In addition, a further part of the export gas is qualitatively improved by the CO2 separation apparatus (8), so as to generate a high-quality reduction gas which can be supplied for metallurgical use.

Description

technical field [0001] The invention relates to a method for operating a smelting reduction process, in particular with a blast furnace or with a melting plant and at least one reduction plant, in which the charge is reduced with a reducing gas using a carbon carrier and possibly a combustion aid and melted to form pig iron or steel raw product, and the converted reducing gas is discharged as top gas and purified as output gas. [0002] The invention also relates to a plant for operating a smelting reduction process with a blast furnace or with a melting plant and at least one reduction plant, in which the charge is reduced with a reducing gas using a carbon carrier and possibly a combustion aid and can be melted into pig iron or steel raw product, and the converted reducing gas is discharged as top gas and cleaned, if necessary mixed with cleaned and cooled excess gas from the melting plant, and sent as export gas. Background technique [0003] It is known from the prior a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/06C21B7/00C21B13/00F02C6/00
CPCC21B13/00C21B5/06F02C6/00C21B7/002Y02P10/122C21B2100/62C21B2100/282F27B1/26F27D17/001Y02P10/25C21B7/00
Inventor R.米尔纳J.L.申克K.韦德
Owner PRIMETALS TECH AUSTRIA GMBH
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