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Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln

A gas-based shaft furnace and combined production technology, applied in the field of metallurgy, can solve the problems of limitation, high cost, singleness, etc., and achieve the effect of solving the insufficient circulation of oxygen blast furnace top gas and eliminating high energy consumption

Inactive Publication Date: 2016-05-18
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the abundant reserves of coal resources and the lack of natural gas resources in my country, the application of this ironmaking process is limited, forming a single iron and steel metallurgy long-process model with coal as the main energy source, resulting in high energy consumption, high pollution, and high costs for the entire industry. unfavorable situation

Method used

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  • Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln
  • Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln
  • Joint production system and joint production method of oxygen blast furnace and gas-based shaft kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] refer to figure 2 and 4 , the joint production system and method of oxygen blast furnace and gas-based shaft furnace are as follows:

[0113] 1) After the top gas of the oxygen blast furnace 10 is dedusted by the dedusting device 30, the gas is divided into two parts. The first part of blast furnace top gas enters the water gas shift device 40 to generate H 2 , then enter the first CO 2 The removal device 50, the second part of the gas directly enters the second CO 2 Removal device 80. The first part of the gas is pressurized and a certain amount of CO 2 And the shaft furnace top gas enters the gasifier 70, reacts chemically with oxygen and coal powder, and obtains H 2 The high-temperature reducing gas with / CO=1~2:1 is blown into the upper air inlet 13 of the blast furnace body, the lower air inlet 12 of the blast furnace hearth and the reducing gas inlet 21 of the gas-based shaft furnace respectively. The second part of the gas from the second CO 2 The remova...

Embodiment 2

[0132] Basically the same as Example 1, the difference is:

[0133] According to theoretical calculation, 3000m 3 Oxygen blast furnace production technical indicators are as follows:

[0134] Oxygen consumption of oxygen blast furnace (90% purity): 255Nm 3 / tHM

[0135] Oxygen blast furnace coal ratio: 200kg / tHM

[0136] Oxygen blast furnace coke ratio: 185kg / tHM

[0137] Furnace top gas volume: 1370Nm 3 / tHM

[0138] Top gas composition: CO: 48.7%, CO 2 : 37.2%, H 2 : 8.3%, H 2 O: 2.6%, N 2 : 3.4%

[0139] Oxygen blast furnace output: 12600tHM / d

[0140] Gasifier oxygen consumption (90% purity): 150Nm 3 / tHM

[0141] Gasifier pulverized coal consumption: 210kg / tHM

[0142] Composition of circulating gas: CO: 44.7%, H 2 : 49.5%, N 2 : 5.8%

[0143] Circulating gas temperature: 1100°C

[0144] Circulating gas volume at the upper air outlet: 390Nm 3 / tHM

[0145] Circulating gas volume at the lower air inlet: 410Nm 3 / tHM

[0146] Gas-based shaft furnace ou...

Embodiment 3

[0148] Basically the same as Example 1, the difference is:

[0149] According to theoretical calculation, 5000m 3 Oxygen blast furnace production technical indicators are as follows:

[0150] Oxygen consumption of oxygen blast furnace (95% purity): 230Nm 3 / tHM

[0151] Oxygen blast furnace coal ratio: 200kg / tHM

[0152] Oxygen blast furnace coke ratio: 195kg / tHM

[0153] Furnace top gas volume: 1390Nm 3 / tHM

[0154] Top gas composition: CO: 49.7%, CO 2 : 37.5%, H 2 : 8.7%, H 2 O: 2.6%, N 2 : 1.5%

[0155] Oxygen blast furnace output: 21000tHM / d

[0156] Gasifier oxygen consumption (95% purity): 130Nm 3 / tHM

[0157] Gasifier pulverized coal consumption: 190kg / tHM

[0158] Composition of circulating gas: CO: 46.7%, H 2 : 50.1%, N 2 : 3.2%

[0159] Circulating gas temperature: 900°C

[0160] Circulating gas volume at the upper air outlet: 380Nm 3 / tHM

[0161] Circulating gas volume at the lower air inlet: 400Nm 3 / tHM

[0162] Gas-based shaft furnace outpu...

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Abstract

The invention discloses a joint production system and a joint production method of an oxygen blast furnace and a gas-based shaft kiln, wherein the joint production system of the oxygen blast furnace and the gas-based shaft kiln comprises the oxygen blast furnace, the gas-based shaft kiln, a dust removal device, a water-gas shift device, a carbon dioxide removal device, a pressurizer, and a gasification furnace; the dust removal device is connected to a blast furnace furnace-top gas outlet of the oxygen blast furnace and a cooling gas inlet in the bottom of the gas-based shaft kiln; the water-gas shift device is connected to the dust removal device; the gas inlet of the carbon dioxide removal device is connected to the water-gas shift device; the pressurizer is connected to the carbon dioxide removal device; the gas inlet of the gasification furnace is connected to the pressurizer; and the gas outlet of the gasification furnace is connected to a lower gas inlet of the oxygen blast furnace and a reducing gas inlet of the gas-based shaft kiln. The system can be used for effectively solving the problem that the oxygen blast furnace furnace-top gas circulation amount is insufficient, and also provides a sufficient gas source for the gas-based shaft kiln.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a joint production system and a joint production method of an oxygen blast furnace and a gas-based shaft furnace. Background technique [0002] my country's iron and steel industry consumes a lot of resources and emits a lot of waste gas at the same time. Among them, the energy consumption and CO 2 The proportion of emissions accounted for by the steel industry is as high as 69% and 73%, respectively. At present, the traditional blast furnace ironmaking technology has reached the extreme in terms of production efficiency and energy utilization, and it is difficult to achieve substantial energy saving and emission reduction in blast furnace ironmaking only by improving operation methods. In view of the increasing awareness of global environmental protection and the increasing depletion of resources, the existing blast furnace ironmaking process must be improved to...

Claims

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Application Information

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IPC IPC(8): C21B7/00C21B13/02C21B13/14C21B5/06C21B7/22
CPCC21B5/06C21B7/00C21B7/22C21B13/023C21B13/14Y02P10/122Y02P10/25
Inventor 孟嘉乐窦从从郑倩倩张照吴道洪
Owner SHENWU TECH GRP CO LTD
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