Method for evaluating reaction performance of carbon-iron composite furnace charge

A technology of reaction performance and evaluation method, applied in the direction of removing certain components, such as weighing, etc., can solve the situation that the performance change of metallurgical coke cannot be truly reflected, the coke heating and reaction environment cannot be used, and it is not suitable for high-reactivity carbon-iron composite charge. Reaction performance and other issues, to ensure environmental and economic benefits, reduce blast furnace ironmaking production costs, and improve the effect of gas utilization

Pending Publication Date: 2022-01-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The gas environment that coke actually experiences in the blast furnace is not only CO 2 , and CO, H 2 and N 2 etc. It is a mixed gas environment, and the coke is moving in the blast furnace, and the content of various gases in the mixed gas is also constantly changing, so this method cannot really reflect the heating and reaction environment of the coke in the blast furnace, and cannot truly reflect the metallurgical coke. Performance changes; especially because iron oxides are contained in high-reactivity coke, iron oxides will react during heating, so this method is not suitable for evaluating the reactivity of high-reactivity carbon-iron composite charge

Method used

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  • Method for evaluating reaction performance of carbon-iron composite furnace charge
  • Method for evaluating reaction performance of carbon-iron composite furnace charge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Ventilate and dry the carbon-iron composite charge with the original iron ore powder content of 0.5% and particle size of 25mm until the moisture content of the material is less than 1%. Sampling 400g(m 0 ) material 8 and measure the carbon content c of material 8 before the reaction 0 =99.2%, the material 8 is loaded into the reaction tank 4 with a certain amount of corundum balls 5 laid on the bottom, after the material 8 is installed, the reaction tank 4 is shaken to make the surface of the material 8 as smooth as possible, and then the cover on the top of the reaction tank 4 is installed. A temperature measuring thermocouple 9 is inserted into the top of the reaction tank 4, and the depth of the temperature measuring thermocouple 9 inserted into the material 8 is about 150 mm. The temperature measuring thermocouple 9 is connected to a computer 11 through a temperature controller 10. Put the entire reaction tank 4 into the corundum tube 6 in the heating furnace 7, a...

Embodiment 2

[0072] Ventilate and dry the carbon-iron composite charge with the original iron ore powder content of 10% and particle size of 20mm until the moisture content of the material is less than 1%. Sampling 370g(m 0 ) material 8 and measure the carbon content of material 8 before the reaction, c 0 =80.1%, put the material 8 into the reaction tank 4 with a certain amount of corundum balls 5 laid on the bottom, shake the reaction tank 4 after the material 8 is installed to make the surface of the material 8 as smooth as possible, and then install the cover on the top of the reaction tank 4. A temperature measuring thermocouple 9 is inserted into the top of the reaction tank 4, and the depth of the temperature measuring thermocouple 9 inserted into the material 8 is about 130mm. The temperature measuring thermocouple 9 is connected to a computer 11 through a temperature controller 10. Put the entire reaction tank 4 into the corundum tube 6 in the heating furnace 7, and hang it under ...

Embodiment 3

[0074] Ventilate and dry the carbon-iron composite charge with the original iron ore powder content of 20% and particle size of 15mm until the moisture content of the material is less than 1%. Sampling 350g(m 0 ) material 8 and measure the carbon content of material 8 before the reaction, c 0 =71%, material 8 is packed into the reaction tank 4 with a certain amount of corundum balls 5 laid on the bottom, shake the reaction tank 4 after the material 8 is installed to make the surface of the material 8 as smooth as possible, and then install the lid on the top of the reaction tank 4. A temperature measuring thermocouple 9 is inserted into the top of the reaction tank 4, and the depth of the temperature measuring thermocouple 9 inserted into the material 8 is about 120 mm. The temperature measuring thermocouple 9 is connected to a computer 11 through a temperature controller 10. Put the entire reaction tank 4 into the corundum tube 6 in the heating furnace 7, and hang it under t...

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Abstract

The invention discloses a method for evaluating the reaction performance of a carbon-iron composite furnace charge. The method comprises the following steps: 1, drying the carbon-iron composite furnace charge; 2, sampling a material (8), testing the carbon content of the material before reaction, and filling the material into a reaction tank (4); 3, inserting a temperature thermocouple (9) into a material in a reaction tank, wherein the reaction tank is suspended in an alundum tube (6) in a heating furnace (7) through a high-temperature thermobalance (12); 4, heating the materials in sections and introducing gas; 5, after the reaction is finished, cutting off the power supply, introducing gas into the reaction tank, moving out the reaction tank, and performing cooling in air; 6, after the materials are cooled to the normal temperature, stopping ventilation, pouring the materials out, testing the weight and the carbon content of the materials, and calculating the reactivity CRIC of the carbon-iron composite furnace burden through a formula. According to the method, the reaction performance of the carbon-iron composite furnace charge can be accurately and truly reflected by utilizing the component characteristics of the carbon-iron composite furnace charge and controlling the temperature and atmosphere of the high-temperature reaction furnace, so that the environmental benefits and economic benefits of blast furnace production are ensured.

Description

technical field [0001] The invention relates to a method for testing and evaluating the performance of blast furnace materials, in particular to a method for evaluating the reaction performance of carbon-iron composite furnace materials. Background technique [0002] With the development of society and the advancement of technology, my country has become the world's largest iron and steel production country, and its steel output ranks first in the world. This puts forward higher requirements for the quality and quantity of coke, a necessary raw material for ironmaking. Due to Coking coal resources are non-renewable energy sources. With the massive consumption of coking coal resources, coking coal resources are becoming less and less, especially high-quality coking coal resources are gradually being exhausted. [0003] Studies have shown that iron and alkali metal element compounds have a positive catalytic effect on the coke gasification reaction, which can promote the format...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 王玉明钱晖胡德生毛晓明
Owner BAOSHAN IRON & STEEL CO LTD
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