A multifunctional blast furnace harmful element adsorption experiment method and device

The technology of a harmful element and an experimental method is applied in the field of a multifunctional blast furnace harmful element adsorption experimental method and its device, which can solve the problems such as the introduction of external influences by liquid and other elements, the single type of harmful element raw materials, and the large difference in the types of harmful elements. Achieve the effect of reducing the cost of blast furnace production experiments, improving applicability and predictability, and improving stability and reproducibility

Active Publication Date: 2022-03-22
WUHAN UNIV OF SCI & TECH
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  • Abstract
  • Description
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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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  • A multifunctional blast furnace harmful element adsorption experiment method and device
  • A multifunctional blast furnace harmful element adsorption experiment method and device
  • A 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 its device, which belong to the technical field of blast furnace ironmaking; the adsorption experiment device of the present invention includes a two-stage heating furnace, a harmful element steam generating device and a harmful element adsorption device. According to the temperature required for the adsorption reaction of the charge, the corresponding gas is introduced to simulate the atmosphere of the blast furnace, and after the set temperature is reached according to the set temperature rise method, the harmful element vapor of the blast furnace is generated to conduct the adsorption experiment. N 2 , when cooled to room temperature, the charge was taken out for analysis. The blast furnace harmful element adsorption experiment method and device of the present invention can be used to simulate the adsorption capacity of the blast furnace charge to different blast furnace harmful elements under different temperature environments and reducing atmospheres in the blast furnace, so as to understand and master the enrichment of blast furnace harmful elements in the blast furnace charge The distribution and the impact on the charge provide important guidance to improve the economic efficiency 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 Patents(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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