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Multifunctional blast furnace harmful element adsorption experiment method and device

A technology of harmful elements and experimental methods, applied in the direction of measuring devices, separation methods, chemical instruments and methods, etc., can solve problems such as the introduction of liquids and other elements into external influences, the single type of harmful element raw materials, and the large difference in the types of harmful elements. Achieve the effects of reducing the cost of blast furnace production experiments, improving applicability and predictability, and improving stability and reproducibility

Active Publication Date: 2020-01-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, most of the methods used in the gas phase adsorption experiments of blast furnace harmful elements in the laboratory are to introduce harmful elements into the furnace charge by spraying, soaking or fumigation, but the liquid and other elements will inevitably introduce external influences.
In addition, the types of harmful element raw materials currently used in laboratory research on the gas phase adsorption of harmful elements in blast furnaces are relatively single, for example: blast furnace harmful element particles are used alone, or blast furnace harmful element compounds, so it is different from the types of harmful elements in the actual smelting process of blast furnaces. The difference is large; at the same time, the commonly used adsorption experiments cannot simulate the reducing atmosphere in the blast furnace, which is quite different from the actual production situation of the blast furnace

Method used

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  • Multifunctional blast furnace harmful element adsorption experiment method and device
  • Multifunctional blast furnace harmful element adsorption experiment method and device
  • Multifunctional blast furnace harmful element adsorption experiment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A multifunctional blast furnace harmful element adsorption experiment method comprises the following steps:

[0078] S1. Add 10g of zinc particles to the upper support frame of the harmful element steam generating device, and then place the harmful element steam generating device on the bottom of the reaction tube. The harmful element steam generating device is located in the lower heating element area of ​​the two-stage heating furnace;

[0079] S2, placing the reaction tube vertically in a two-stage heating furnace;

[0080] S3. Mix 100g of pellets, 100g of sintered ore and 100g of coke evenly and add them into the mesh cylinder cavity of the harmful element adsorption device, and hang the hook on the ring of the sealing cover, so that the harmful element adsorption device is located in two sections The upper heating body area of ​​the type heating furnace;

[0081] S4. Set the temperature rise mode of the two-stage heating furnace, set the preheating temperature of ...

Embodiment 2

[0105] This embodiment provides a multifunctional blast furnace harmful element adsorption experiment method, which is basically the same as in Example 1, except that the harmful element added in step S1 is potassium carbonate, and in step S3, 100g pellets, 100g Sinter and 100g of coke are sequentially added to the mesh cylinder cavity of the harmful element adsorption device; at the same time, in step S1, according to the chemical reaction formula K 2 CO 3 +2C=1.5 times of the calculated value of the stoichiometric ratio in 3CO+2K Add carbon elemental substance to reduce potassium carbonate to potassium elemental substance, and the heat preservation temperature in the area of ​​the harmful element generating device is 1300°C; except for the above differences, other operations are the same , which will not be repeated here.

[0106] Figure 10 Middle (a) is the macro-morphological characterization diagram of pellets after potassium adsorption. From the results in the figure,...

Embodiment 3

[0111] This embodiment provides a multifunctional blast furnace harmful element adsorption experiment method, which is basically the same as in Example 1, except that the harmful element added in step S1 is sodium carbonate, and in step S3, 100g pellets, 100g Sintered ore and 100g coke are sequentially added to the mesh cylinder cavity of the harmful element adsorption device; at the same time, in step S1, according to the chemical reaction formula Na 2 CO 3 1.5 times of the stoichiometric ratio calculation value of +2C=3CO+2Na adds carbon simple substance and sodium carbonate is reduced to sodium simple substance, and the insulation temperature of described harmful element generation device area is 1300 ℃; Except above-mentioned difference, other operations are all the same, I won't repeat them here.

[0112] Figure 12 Middle (a) is the macroscopic characterization result diagram of the pellets after adsorbing sodium element. It can be seen from the figure that a small amo...

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Abstract

The invention discloses a multifunctional blast furnace harmful element adsorption experiment method and device and belongs to the technical field of blast furnace ironmaking. The adsorption experiment device comprises a two-stage heating furnace, a harmful element steam generation device and a harmful element adsorption device. During an experiment, corresponding gas is introduced according to the temperature required by furnace burden adsorption reaction to simulate blast furnace atmosphere, harmful element steam of a blast furnace is generated for the adsorption experiment after the set temperature is reached according to a set temperature rising mode, N2 is introduced when the temperature is reduced to 400 DEG C after the reaction is finished, and furnace burden is taken out for analysis when the furnace burden is cooled to normal temperature. The blast furnace harmful element adsorption experiment method and the blast furnace harmful element adsorption experiment device can be used for simulating the adsorption capacity of the furnace burden for different blast furnace harmful elements in different temperature environments and reducing atmospheres in the blast furnace, therefore, and important guidance is provided for knowing and mastering the enrichment distribution condition of the blast furnace harmful elements in the blast furnace burden and the influence on the burdento improve the economic benefit of blast furnace production.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular provides a multifunctional blast furnace harmful element adsorption experiment method and a device thereof. Background technique [0002] Blast furnace charge usually contains a certain amount of harmful elements such as potassium, sodium, lead, zinc, etc., but the amount entering the slag and iron is not much, most of the harmful elements will be reduced and evaporated in the high temperature zone and rise with the blast furnace gas flow . And in the process of rising, it will be in full contact with the blast furnace charge and the blast furnace lining, and part of the harmful elements in it will be absorbed by coke and ore, and then descend to the high temperature zone of the blast furnace, be reduced and re-enter the gas flow, resulting in harmful elements Circular enrichment has a huge impact on the blast furnace smelting process. The enrichment of harmfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/22G01N33/22B01D53/04
CPCG01N25/22G01N33/222B01D53/04
Inventor 王炜王鑫杰徐润生周进东杨代伟昝日安陈绪亨李静轩汤沉桀
Owner WUHAN UNIV OF SCI & TECH
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