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Iron-making method by utilizing flash iron-making furnace

An ironmaking furnace and flash technology, applied in the field of metallurgy, can solve the problems of long process, large investment and high energy consumption

Inactive Publication Date: 2015-03-25
邱江波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Traditionally, blast furnaces are usually used for ironmaking, but there are many problems in the process of blast furnace ironmaking, such as long process, large investment, low yield, high energy consumption, and serious environmental pollution. Although other ironmaking methods also exist in related technologies process method to overcome the problems of the blast furnace, but the effect is not ideal, and there is still a need for further improvement

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  • Iron-making method by utilizing flash iron-making furnace
  • Iron-making method by utilizing flash iron-making furnace
  • Iron-making method by utilizing flash iron-making furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Provide iron ore concentrate raw materials with a particle size of 0.074 microns accounting for about 80%. use figure 1 The chamber blast furnace ironmaking plant shown performs ironmaking. First, the temperature in the cavity of the furnace body is controlled to be 1180-1220 degrees Celsius, and the reducing atmosphere contains 70-80 volume percent of carbon monoxide. Continuously dry iron concentrate, solvent and fuel including coke, pulverized coal and oxygen are sprayed into the cavity of the cavity furnace shaft 1 of the chamber blast furnace ironmaking device, and a high-temperature reduction system is formed in the reduction tower cavity. Reactive atmosphere; make dry iron concentrate and reducing gas undergo redox reaction in cavity furnace shaft 1 to obtain molten iron, slag and flue gas, and form coke layer, slag layer and molten iron from top to bottom in the molten pool layer. Continue to inject pulverized coal and oxygen into the slag layer of the molten...

Embodiment 2

[0053] Provide iron ore concentrate raw materials with a particle size of 0.074 microns accounting for about 80%. use figure 1 The twin-tower flash furnace shown is used for iron smelting. First, the temperature in the cavity of the furnace body is controlled to be 1180-1220 degrees Celsius, and the reducing atmosphere contains 70-80 volume percent of carbon monoxide. Spray into the first reduction tower 20 continuous dry iron concentrate, solvent and fuel including coke, pulverized coal and oxygen, and make the first reduction tower 20 continue to form a high-temperature reducing atmosphere; make the dry iron concentrate and reduction The gas undergoes redox reaction in the first reduction tower 20 to obtain molten iron, slag and flue gas, and forms a coke layer, slag layer and molten iron layer from top to bottom in the molten pool.

[0054] The wet concentrate fed into the second reduction tower 30 is dried and pre-reduced by using the flue gas generated in the first redu...

Embodiment 3

[0057] Provide iron ore concentrate raw materials with a particle size of 0.074 microns accounting for about 80%. use figure 1 The shown drying and reduction integrated flash ironmaking equipment is used for ironmaking. Firstly, the temperature inside the reduction tower body 20 is controlled to be 1180-1220 degrees Celsius, and the reducing atmosphere contains 70-80 volume percent carbon monoxide. Spray into the reduction tower body 20 continuous dry iron concentrate, solvent and fuel including coke, pulverized coal and oxygen, and make the reduction tower body 20 continue to form a high-temperature reducing atmosphere; make the dry iron concentrate and reducing gas in the Oxidation and reduction reactions occur in the reduction tower body 20 to obtain molten iron, slag and flue gas, and a coke layer, slag layer and molten iron layer are formed from top to bottom in the molten pool.

[0058] The wet concentrate fed into the pre-reduction drying tower 40 is dried and pre-red...

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Abstract

The invention provides an iron-making method by utilizing a flash iron-making furnace. The iron-making method comprises the following steps: spraying dry iron ore concentrate, a solvent and a fuel comprising coke, pulverized coal and oxygen in a cavity of a reduction tower of the flash iron-making furnace, and forming a high-temperature reducing atmosphere in the cavity of the reduction tower; carrying out an oxidation-reduction reaction inside the cavity of the reduction tower on the dry iron core concentrate and reducing gas to obtain molten iron, slag and smoke gas, and forming a coke layer, a slag layer and a molten iron layer from top to bottom inside a molten pool, wherein the oxidation-reduction reaction is carried out at 600-1200 DEG C, and 5-80% of carbon monoxide in volume is contained in the reducing atmosphere. The iron-making method by adopting the embodiment of the invention is simple in technology and low in cost, and the reduction reaction efficiency can be obviously improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a method for making iron using a flash ironmaking furnace. Background technique [0002] Traditionally, blast furnaces are usually used for ironmaking, but there are many problems in the process of blast furnace ironmaking, such as long process, large investment, low yield, high energy consumption, and serious environmental pollution. Although other ironmaking methods also exist in related technologies Technological method to overcome the problem of blast furnace, but the effect is not ideal, there is still a demand for further improvement. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, an object of the present invention is to propose a method for ironmaking using a flash ironmaking furnace that is fast and energy-saving. [0004] According t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00
Inventor 不公告发明人
Owner 邱江波
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