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Method for measuring iron ore soft melting gas permeability

A technology of iron ore and gas permeability, which is applied in the field of metallurgy and can solve problems such as not being able to reflect the production status of the blast furnace well

Active Publication Date: 2017-09-08
NORTHEASTERN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the traditional charging method of the droplet experiment cannot reflect the actual production status of the blast furnace well.

Method used

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  • Method for measuring iron ore soft melting gas permeability
  • Method for measuring iron ore soft melting gas permeability
  • Method for measuring iron ore soft melting gas permeability

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 and use effect

[0049] The difference between this experiment and other melting drop experiments is that the raw materials are loaded in different ways. By comparing the results of the two groups of experiments, the effects of the two different loading methods on the iron ore reflow dripping performance and the reflow belt permeability are investigated. It can be concluded that the new charging mode can more effectively reflect the actual production status of the blast furnace. The pressure difference curves of the two charging modes are attached Figure 6 shown.

[0050] After ore remelting, even if it is completely airtight, when only the coke layer maintains good air permeability, the gas passage area is 1 / 3.16=0.32 of the original. According to the gas equation, the maximum pressure difference should be 1 / 0.32=3.16 times of the original. attached Figure 5 Among them, the initial pressure of the material column is about 0.3kPa. (1) In the original ...

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Abstract

The invention discloses a method for measuring iron ore soft melting gas permeability. The charging manner of coke and iron ore is changed, and therefore the gas flowing manner conforms to the actual situation of blast furnace production better. According to the concrete structure, a coke layer is additionally arranged beside an iron ore layer; and when gas permeability is poor due to iron ore soft melting, the coke serves as a coke window and is a main channel for gas flowing. The method has the beneficial effects that in the charging mode of the method, the coal gas flowing manner is that flowing is achieved through the coke window, a little part of coal gas passes through the ore soft melting layer poor in gas permeability, and therefore the coal gas flow distribution condition in a crucible is more similar to the production practice of a blast furnace, and the expected experimental objective can be achieved easily.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for measuring the gas permeability of iron ore reflow. Background technique [0002] In the internal structure of the blast furnace, the gas permeability of the reflow zone will have a greater impact on the gas permeability of the blast furnace, and the shape and position of the reflow zone will also have an important impact on the gas flow distribution of the blast furnace and the gas permeability of the lower part of the blast furnace. At present, researchers mainly use ore reflow drop experiments to explore the high-temperature reflow properties of iron ore. In such experiments, the air permeability of the reflow zone is characterized by examining the pressure difference between the upper and lower sides of the crucible: a small pressure difference between the upper and lower sides of the crucible indicates that the reflow zone has better air permeability, otherwis...

Claims

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Application Information

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IPC IPC(8): C21B5/00
CPCC21B5/00
Inventor 姜鑫沈峰满郭贺郑海燕高强健张枥
Owner NORTHEASTERN UNIV