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Gas Desulfurization in Pig Iron Production

一种气体、生铁的技术，应用在减少气体排放、废气处理、气候可持续性等方向，能够解决技术和单元不方便、成本高等问题，达到改善还原程序、增加氢气含量的效果

Inactive Publication Date: 2017-09-01
PRIMETALS TECH AUSTRIA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the techniques and units required to achieve this effect are inconvenient and costly

Method used

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  • Gas Desulfurization in Pig Iron Production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] figure 1 shows the COREX ® A method and a plant for the production of liquid pig iron 1 utilizing and desulphurizing coke oven gas in an integrated direct reduction plant.

[0060] to the first reduction plant 4 (COREX with fixed bed) via the supply line 20 ® reduction shaft furnace) to supply the charge 2 containing iron oxide in order to supply the charge 2 containing iron oxide. These materials are reduced by the reducing gas 5 to obtain a partially reduced iron product 3 which is subsequently introduced into the melter-gasifier 11 via a plurality of iron product supply lines 22 leading to the molten gas Furnace 11. In addition, the carbon carrier 10 in the form of coal lumps is introduced via the carbon carrier supply line 23 , and the oxygen-containing gas 9 is introduced into the melter-gasifier 11 via the medium supply line 24 . Carbon carrier 10 introduced into melter-gasifier 11 is gasified by oxygen-containing gas 9 , and reducing gas 5 is formed. A reduc...

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Abstract

The invention relates to a method for the production of liquid pig iron (1), wherein a charge (2) containing iron oxide is reduced in a first reduction plant (4) by means of a reducing gas (5) to form partially reduced first iron product (3) and is melted in a melter-gasifier (11) to form said liquid pig iron (1), wherein the spent reducing gas (5) is introduced as exhaust gas (6) to the second reducing plant (7), and wherein sulfur-containing gas (13) is introduced into said melter-gasifier (11) together with oxygen-containing gas (9) and / or with dust (16) and / or into the reducing gas line (12). The invention also relates to a device for carrying out the method. Liquid pig iron (1) or DRI can thus be produced using sulphur-containing gas (13) with increased yields without damaging the environment or adversely affecting the quality of liquid pig iron (1) or DRI.

Description

technical field [0001] The present invention relates to a method for producing liquid pig iron (flüssigem Roheisen, or "blast furnace molten iron"), which comprises the reduction of an iron oxide-containing charge (Einsatzstoffen) by means of a reducing gas in a first reduction unit to obtain a partial reduction The first iron product, and the reducing gas used in the reduction is pumped out as exhaust gas to remove CO from the exhaust gas 2 , and the exhaust gas is introduced into at least one second reduction unit to produce a partially reduced second iron product, the partially reduced first iron product, oxygen-containing gas and carbon carrier are introduced into the melter-gasifier, in gasifying the carbon carrier using an oxygen-containing gas in the melter-gasifier and melting the partially reduced first iron product to obtain liquid pig iron and forming a reducing gas, and introducing at least a portion of the reducing gas into the first iron product through a reducin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B13/00C21B13/14
CPCC21B13/002C21B13/143Y02P10/122C21B2100/22C21B2100/42C21B2100/282C21B2100/26Y02P10/134C21B5/001C21B5/007C21B7/002C21B7/16
Inventor R.米尔纳
Owner PRIMETALS TECH AUSTRIA GMBH