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Short-process smelting reduction type iron-making system and method

A short process, iron ore powder technology, applied in the field of ironmaking, can solve the problems of blast furnace development crisis, air pollution, long production process, etc., and achieve the effect of full reduction effect

Pending Publication Date: 2019-02-12
TANGSHAN YANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many problems in the development of blast furnaces. The overall production process of blast furnace ironmaking technology is too long, and the production process of sinter, pellets and coke causes serious air, water and dust pollution; at the same time, the large consumption of blast furnace coking coal and its reserves Contradictions between less and less will inevitably bring crisis to the follow-up development of the blast furnace

Method used

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  • Short-process smelting reduction type iron-making system and method
  • Short-process smelting reduction type iron-making system and method
  • Short-process smelting reduction type iron-making system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 shown

[0051] A short-flow smelting reduction ironmaking system, including coal powder preparation device 1-1, iron ore powder preparation device 1-2, iron ore powder direct reduction and powder coke preparation device, gas-solid separation device 1-3; iron ore powder The direct reduction and powder coke preparation device is a U-shaped structure connected at the bottom. The two sides are respectively a low-temperature reduction section 15 and a high-temperature reduction section 16. The bottom is a melting reduction section 24. The coal powder preparation device 1-1, iron ore powder preparation Devices 1-2 are respectively connected to the middle and bottom of the low-temperature reduction section 15, the low-temperature reduction section 15 is connected to the gas-solid separation device 1-3, and the gas-solid separation device 1-3 is respectively connected to the top burner 22 and the middle part of the high-temperature reduction section 16 .

Embodiment 2

[0053] Such as figure 2 shown

[0054] A short-flow smelting reduction ironmaking system, including coal powder preparation device 1-1, iron ore powder preparation device 1-2, iron ore powder direct reduction and powder coke preparation device, gas-solid separation device 1-3; iron ore powder The direct reduction and powder coke preparation device is a U-shaped structure connected at the bottom. The two sides are respectively a low-temperature reduction section 15 and a high-temperature reduction section 16. The bottom is a melting reduction section 24. The coal powder preparation device 1-1, iron ore powder preparation Devices 1-2 are respectively connected to the middle and bottom of the low-temperature reduction section 15, the low-temperature reduction section 15 is connected to the gas-solid separation device 1-3, and the gas-solid separation device 1-3 is respectively connected to the top burner 22 and the middle part of the high-temperature reduction section 16 .

[...

Embodiment 3

[0060] Such as image 3 shown

[0061] A short-flow smelting reduction ironmaking system, including coal powder preparation device 1-1, iron ore powder preparation device 1-2, iron ore powder direct reduction and powder coke preparation device, gas-solid separation device 1-3; iron ore powder The direct reduction and powder coke preparation device is a U-shaped structure connected at the bottom. The two sides are respectively a low-temperature reduction section 15 and a high-temperature reduction section 16. The bottom is a melting reduction section 24. The coal powder preparation device 1-1, iron ore powder preparation Devices 1-2 are respectively connected to the middle and bottom of the low-temperature reduction section 15, the low-temperature reduction section 15 is connected to the gas-solid separation device 1-3, and the gas-solid separation device 1-3 is respectively connected to the top burner 22 and the middle part of the high-temperature reduction section 16 .

[0...

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Abstract

The invention relates to a short-process smelting reduction type iron-making system and a method, and belongs to the technical field of iron-making. The system comprises a coal powder preparation device, an iron ore powder preparation device, an iron ore powder direct reduction and powder coke preparation device and a gas-solid separation device; the iron ore powder direct reduction and powder coke preparation device is of a U-shaped structure with a communicating bottom, the two sides of the iron ore powder direct reduction and powder coke preparation device serve a low-temperature reductionsection and a high-temperature reduction section correspondingly, the bottom of the iron ore powder direct reduction and powder coke preparation device serves a smelting reduction section, molten ironis obtained at the bottom of the smelting reduction section, the coal powder preparation device and the iron ore powder preparation device are connected with the middle lower portion and the bottom of the low-temperature reduction section correspondingly, the low-temperature reduction section is connected with the gas-solid separation device, and the gas-solid separation device is connected witha top combustion device and the middle of the high-temperature reduction section correspondingly. Through three-stage iron ore powder reduction, the reducibility characteristics of different components of the coal powder are fully utilized, then the multi-stage reduction of the coal powder and the iron ore powder is realized, the comprehensive efficient clean utilization of the coal and the iron ore are finally realized, and the short-process iron-making process is completed on the basis that the separate full utilization of the coal powder is realized.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and in particular relates to a short-flow smelting reduction ironmaking system and method. Background technique [0002] The current ironmaking technology is mainly based on blast furnace ironmaking. After a long period of continuous improvement and perfection, blast furnace ironmaking technology has developed into a mature and advanced production process, and its competitiveness has reached an unprecedented level. However, there are many problems in the development of blast furnaces. The overall production process of blast furnace ironmaking technology is too long, and the production process of sinter, pellets and coke causes serious air, water and dust pollution; at the same time, the large consumption of blast furnace coking coal and its reserves The contradictions among the less will inevitably bring crisis to the follow-up development of the blast furnace. [0003] In recent years, with ...

Claims

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Application Information

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IPC IPC(8): C21B13/14
CPCC21B13/0006C21B13/0066C21B13/0073C21B13/14
Inventor 马春元付加鹏王涛周滨选张振赵希强
Owner TANGSHAN YANSHAN IRON & STEEL CO LTD
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