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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 problems such as high cost, restrictions, and high pollution, and achieve the effect of eliminating high energy consumption and solving the insufficient circulation of oxygen blast furnace top gas

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] refer to figure 1 and 2 , the details of the combined production system and method of an oxygen blast furnace and a gas-based shaft furnace are:

[0094] 1) After the blast furnace 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 the gas enters the water gas shift device 40 to generate H 2 , and then enter the CO 2 The removal device 50, the second part of the gas directly enters the CO 2 Removal device 50, two parts of gas are mixed with gas-based shaft furnace top gas to remove part of CO 2 , after being pressurized by the pressurizer 60, it enters the gasifier 70 to react with oxygen and pulverized coal to obtain H 2 The high temperature reducing gas with / CO=1~2:1, a part is blown into the oxygen blast furnace 10 from the upper air inlet and the lower air inlet of the oxygen blast furnace, and the other part enters the gas-based shaft furnace 20 to reduce and oxidize the pellets ...

Embodiment 2

[0113] It is basically the same as Example 1, the difference is:

[0114] According to theoretical calculation, 3000m 3 Oxygen blast furnace production technical indicators are as follows:

[0115] Oxygen consumption of oxygen blast furnace (90% purity): 245Nm 3 / tHM

[0116] Oxygen blast furnace coal ratio: 200kg / tHM

[0117] Oxygen blast furnace coke ratio: 178kg / tHM

[0118] Furnace top gas volume: 1357Nm 3 / tHM

[0119] Top gas composition: CO: 50.4%, CO 2 : 36.9%, H 2 : 6.3%, H 2 O: 2.6%, N 2 : 3.8%

[0120] Oxygen blast furnace output: 12600tHM / d

[0121] Gasifier oxygen consumption (90% purity): 162Nm 3 / tHM

[0122] Gasifier pulverized coal consumption: 225kg / tHM

[0123] Composition of circulating gas: CO: 45.8%, H 2 : 48.4%, N 2 : 5.8%

[0124] Circulating gas temperature: 1100°C

[0125] Circulating gas volume at the upper air outlet: 382Nm 3 / tHM

[0126] Circulating gas volume at the lower air outlet: 400Nm 3 / tHM

[0127] Gas-based shaft fur...

Embodiment 3

[0129] It is basically the same as Example 1, the difference is:

[0130] According to theoretical calculation, 5000m 3 Oxygen blast furnace production technical indicators are as follows:

[0131] Oxygen consumption of oxygen blast furnace (95% purity): 225Nm 3 / tHM

[0132] Oxygen blast furnace coal ratio: 200kg / tHM

[0133] Oxygen blast furnace coke ratio: 191kg / tHM

[0134] Furnace top gas volume: 1368Nm 3 / tHM

[0135] Top gas composition: CO: 51.8%, CO 2 : 37.5%, H 2 : 6.6%, H 2 O: 2.6%, N 2 : 1.5%

[0136] Oxygen blast furnace output: 21000tHM / d

[0137] Gasifier oxygen consumption (95% purity): 133Nm 3 / tHM

[0138] Gasifier pulverized coal consumption: 200kg / tHM

[0139] Composition of circulating gas: CO: 47.8%, H 2 : 49.0%, N 2 : 3.2%

[0140] Circulating gas temperature: 900°C

[0141] Circulating gas volume at the upper air outlet: 382Nm 3 / tHM

[0142] Circulating gas volume at the lower air outlet: 400Nm 3 / tHM

[0143] Gas-based shaft furn...

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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; the water-gas shift device is connected to the dust removal device; the gas inlet of the carbon dioxide removal device is separately connected to the dust removal device, the water-gas shift device and the shaft kiln kiln-top gas outlet of the gas-based shaft kiln; the pressurizer is connected to the carbon dioxide removal device; and the gas inlet of the gasification furnace is connected to the pressurizer. 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, and in particular, the invention relates to a combined production system and a combined 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. Among them, the energy consumption and CO 2 Emissions account for 69% and 73% of the steel industry, respectively. At present, the traditional blast furnace ironmaking technology has been brought into full play 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 the improvement of operating means. 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 make it more in line with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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