Experimental method and device for gas-based reduction and slagging process of iron-containing raw materials

A technology of iron-containing raw materials and experimental equipment, applied in the direction of weighing by removing certain components, can solve problems such as inconvenient operation, inability to meet the requirements of process detection and later sampling, and complex structure

Inactive Publication Date: 2016-08-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is mainly to provide an experimental method to study the interaction relationship between the reducibility of iron-containing raw materials and slagging (i.e. reflow-dripping) to solve the existing The experimental method and device cannot meet the requirements of process detection and post-sampling, and it is necessary to use different equipment to study the reduction and slagging characteristics of iron-containing raw materials, and there are problems of complex structure and inconvenient operation

Method used

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  • Experimental method and device for gas-based reduction and slagging process of iron-containing raw materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: an experimental method for gas-based reduction and slagging process of iron-containing raw materials, comprising the following steps:

[0048] 1) Take 100 g of ferric oxide pure reagent (purity greater than 99%), grind it to below 200 mesh, then take out 5 g of it and place it in a mold, and press it under a pressure of 20 MPa to make a diameter of the bottom surface of 15 mm and a thickness of 5 mm. mm cylindrical block;

[0049] 2) Place the sample in a hanging basket made of molybdenum wire, and hang it in the middle of the reaction furnace through the metal molybdenum wire. The total weight is 25 g), and it is connected to the secondary electronic balance, and the upper sealing cover and the two lower sealing covers of the reaction tube are covered;

[0050] 3) Open the nitrogen valve, empty the air in the reaction tube, turn on the power supply of the reaction furnace and the preheating furnace at the same time, and set the target temperature of both...

Embodiment 2

[0059] Embodiment 2: adopting above-mentioned device to carry out gas-based reduction of iron-containing raw material, the experimental method of slagging process, comprises the following steps:

[0060] 1) ~ 5) with embodiment 1;

[0061] 6) After the reduction degree of the sample reaches 50%, set the target temperature of the reaction furnace to 1200°C, and the heating rate is 10°C / min;

[0062] 7) After reaching 1200°C, further keep the temperature constant for 60 minutes;

[0063] 8) After 60 minutes, close the carbon monoxide valve, record the final reduction level of the sample, put the aqueous sample collection tank under the reaction tube, open the lower sealing cover of the reaction tube at the same time, remove the hanger from the primary balance The metal molybdenum wire of the sample allows the sample to fall into the sample collection tank under the action of gravity;

[0064] 9) Analyze the slagging characteristics (morphological distribution, phase distributi...

Embodiment 3

[0065] Embodiment 3: adopting above-mentioned device to carry out gas-based reduction of iron-containing raw material, the experimental method of slagging process, comprises the following steps:

[0066] 1) Take 100 g of iron ore powder (Australian ore, Brazilian ore or domestic concentrate powder can be used), grind it to below 200 mesh, then take out 5 g of it and put it in the mold, press it under 20 MPa pressure to make the bottom diameter of 15 mm, cylindrical block with a thickness of 5 mm;

[0067] 2) Place the sample in a hanging basket made of molybdenum wire, and hang it in the middle of the reaction furnace through the metal molybdenum wire. The total weight is 25 g), and it is connected to the secondary electronic balance, and the upper sealing cover and the two lower sealing covers of the reaction tube are covered;

[0068] 3) Open the nitrogen valve, empty the air in the reaction tube, close the inlet and outlet valves of the reaction tube and open the straight-...

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Abstract

The invention provides an experimental method for the gas-based reduction and slagging process of iron-containing raw materials. The iron-containing raw materials are ground and pressed into blocks as samples; the samples are placed in an environment that simulates gas-based reduction and slagging, and Gas-based reduction experiment; at the same time, record the weight loss and tail gas composition data of the sample during the reduction process in real time; after the gas-based reduction experiment is completed, the sample is subjected to a high-temperature slagging experiment, and the sample is preserved by water quenching after being melted and dropped at a high temperature Its high temperature crystal structure. The method of the present invention solves the problems that the existing experimental methods and devices cannot meet the requirements of process detection and post-sampling, and uses different equipment to study the reducibility and slagging characteristics of iron-containing raw materials, and there are problems such as inconvenient operation. According to the blast furnace itself is a continuous The principle of the production process is closely related to the gas-based reduction and slagging process of iron-containing raw materials in the reflow zone, and the method of the present invention is creatively proposed to study the influence of iron-containing raw material reduction on slagging. The present invention also provides an experimental device for realizing the above method.

Description

technical field [0001] The invention relates to the technical field of metallurgical engineering, in particular to an experimental method for the gas-based reduction and slagging process of iron-containing raw materials, and a device for realizing the method. Background technique [0002] Determining the metallurgical properties of sinter, pellets, lump ore and other iron-containing raw materials is an important research content in metallurgical engineering experiments, which helps to guide the ironmaking process, especially the blast furnace ironmaking process to select the appropriate charge structure to achieve The purpose of cost reduction and efficiency increase. In a nutshell, the metallurgical properties of iron-containing charge usually mainly include reducibility, low-temperature reduction pulverization, load reduction softening-melt dripping, etc., and the experimental methods and devices for testing each metallurgical performance are relatively independent. In co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 徐健王冬东徐扬胡招文邓青宇张生富白晨光温良英邱贵宝吕学伟扈玫珑寇明银候自兵
Owner CHONGQING UNIV
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