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Shaft furnace burden breathability test device and test method

A testing device and testing method technology, applied in the direction of measurement device, analysis material, permeability/surface area analysis, etc., can solve the problems of not considering the resistance loss of the material column, not suitable for the measurement of the gas permeability of the shaft furnace charge, etc., to achieve a simple device. Effect

Pending Publication Date: 2017-08-01
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are some measurement techniques for simulating the gas permeability of block belts at different positions in the blast furnace, but there is no measurement applicable to the gas permeability of the shaft furnace charge under different operating parameters
At the same time, the existing measurement technology does not take into account the influencing factor of the increase in the resistance of the material column due to the pressure of the upper furnace material that softens the load and deforms the furnace material during the process of descending the furnace material, as well as the bonding.

Method used

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  • Shaft furnace burden breathability test device and test method

Examples

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Effect test

Embodiment 1

[0051] The test uses 500g of high-grade iron concentrate oxidation pellets with a particle size of 10-12.5mm. The diameter of the shaft furnace reaction tube is 6cm. The grid orifice plate and alumina balls are pre-installed in the shaft furnace reaction tube before loading the iron concentrate pellets. Put a porous graphite plate on the upper part of the pellet sample, insert a thermocouple into the center of the pellet sample, then cover and seal the upper part of the reaction tube, and then put the reaction tube into the hearth of the high-temperature furnace. according to figure 1 As shown, connect the intake equipment, differential pressure transmitter, reducing gas analyzer and computer acquisition system respectively. After completing all the preparatory work, open the valves of each gas cylinder, and open each system software of the computer to start the test. First, heat the charge to 400°C at a rate of 10°C / min through an electric furnace, during which 5L / min of N ...

Embodiment 2

[0055] 500g of laterite nickel ore oxide pellets with a particle size of 10-12.5mm were used in the test. The diameter of the shaft furnace reaction tube was 6cm. The grid orifice plate and alumina balls were pre-installed in the shaft furnace reaction tube before loading the oxide pellets. Put a porous graphite plate on the upper part of the pellet sample, insert a thermocouple into the center of the pellet sample, then cover and seal the upper part of the reaction tube, and then put the reaction tube into the hearth of the high-temperature furnace. according to figure 1 As shown, connect the intake equipment, differential pressure transmitter, reducing gas analyzer and computer acquisition system respectively. After completing all the preparatory work, open the valves of each gas cylinder, and open each system software of the computer to start the test. First, heat the charge to 400°C at a rate of 10°C / min through an electric furnace, during which 5L / min of N 2 For protect...

Embodiment 3

[0058] The test uses 500g of vanadium-titanium-iron concentrate oxidation pellets with a particle size of 10-12.5mm. The diameter of the shaft furnace reaction tube is 6cm. The grid orifice plate and alumina balls are pre-installed in the shaft furnace reaction tube before loading the oxide balls. group. Put a porous graphite plate on the upper part of the pellet sample, insert a thermocouple into the center of the pellet sample, then cover and seal the upper part of the reaction tube, and then put the reaction tube into the hearth of the high-temperature furnace. according to figure 1 As shown, connect the intake equipment, differential pressure transmitter, reducing gas analyzer and computer acquisition system respectively. After completing all the preparatory work, open the valves of each gas cylinder, and open each system software of the computer to start the test. First, heat the charge to 400°C at a rate of 10°C / min through an electric furnace, during which 5L / min of N...

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Abstract

The invention relates to a shaft furnace burden breathability test device and a test method. The device comprises a sample fixing unit, a load weight, a sensor unit, a computer system and an electric heating furnace. The sample fixing unit comprises a shaft furnace reaction tube, a grid pore plate, an alumina ball and a porous graphite plate. The grid pore plate is arranged at the bottom of a sample to be tested in the shaft furnace reaction tube, and the alumina ball is arranged between the grid pore plate and the sample to be tested; the porous graphite plate is arranged on the upper part of the sample to be tested in the shaft furnace reaction tube; the electric heating furnace is arranged on the outer side of the shaft furnace reaction tube; the sensor unit comprises a thermocouple and a differential pressure transmitter, and the computer system is connected to the signal output end of the differential pressure transmitter. According to the invention, the permeability of furnace burden can be tested, and also the reduction process of the furnace burden can be analyzed. The device is simple, the parameters of a test process are easy to adjust, and a positive guiding effect on actual production is realized.

Description

technical field [0001] The present invention generally relates to the field of reduction shaft furnaces, in particular to a test device and a test method for gas permeability of shaft furnace charge. Background technique [0002] After decades of development, the direct reduction ironmaking process has become an important new ironmaking method. The direct reduction method is divided into the gas-based method and the coal-based method. Among them, the sponge iron produced by the gas-based shaft furnace process accounts for about 76% of the world's total output, and has become the main process for the production of direct reduced iron. Direct reduced iron can be used as a charge for electric furnace steelmaking and as a coolant for converter steelmaking, and can also be used in blast furnaces to reduce the coke ratio. When direct reduced iron is used as a coolant for converter steelmaking, compared with scrap steel, its cooling effect is 1.5-2.0 times that of scrap steel, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0806G01N15/0826
Inventor 员晓范志辉刘亮曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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