Method for visually determining basic metallurgical performance of iron powdered ore

A determination method and technology of iron ore powder, applied in flow characteristics, measuring devices, testing moving fluids/granular solids, etc., to achieve the effect of simple and easy-to-learn method operation, reduce errors, and improve precision and accuracy

Inactive Publication Date: 2013-01-16
UNIV OF SCI & TECH BEIJING
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  • Description
  • Claims
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Problems solved by technology

Therefore, the determination of the pyrometallurgical p

Method used

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  • Method for visually determining basic metallurgical performance of iron powdered ore
  • Method for visually determining basic metallurgical performance of iron powdered ore
  • Method for visually determining basic metallurgical performance of iron powdered ore

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0051] Example 1

[0052] Assimilation of iron ore powder:

[0053] The iron ore powder used in the test comes from the blast furnace production site. The iron ore powder and analytically pure CaO reagent are made into fine powder (less than 0.149mm); the granulated iron ore powder is bonded with a small amount of dextrin and placed in the mold maker A cylindrical sample with a diameter of 7mm×5mm was prepared in the middle, and it was ready to be used after drying; a little CaO was pressed under a certain pressure into a small cake with a diameter of 20mm×5mm, and the pressing pressure was 20000N; The sample is placed on the CaO cake and placed in a magnetic boat equipped with a corundum plate. Prepare four groups of samples in this way and put them into the magnetic boat; slowly push the magnetic boat into the horizontal heating furnace so that it is in the constant temperature zone of the horizontal heating furnace, turn on the camera, and adjust the position of the magnetic bo...

Example Embodiment

[0056] Example 2

[0057] Liquid phase fluidity of iron ore powder:

[0058] The iron ore powder used in the experiment comes from the blast furnace production site. The iron ore powder and analytically pure CaO reagent are made into fine powder (-0.149mm), and mixed according to a certain alkalinity; take the mixed sample into a special stainless steel In the mold, under certain pressure, press into a cylindrical test sample with a diameter of 8mm×5mm; put it into a magnetic boat equipped with corundum plate. Prepare four groups of samples in this way and put them into the magnetic boat; slowly push the magnetic boat into the horizontal heating furnace so that it is in the constant temperature zone of the horizontal heating furnace, turn on the camera, and adjust the position of the magnetic boat appropriately. Make the image clearly visible; select liquid phase fluidity; set up a horizontal heating furnace heating system: room temperature~1280℃: 20℃ / min; gas selection N 2 , The ...

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Abstract

The invention provides a method for determining the basic metallurgical performance of iron powdered ore. A test process comprises the following steps of: selecting a blocky mixture of the iron powdered ore and auxiliary materials, placing the blocky mixture in a horizontal heating furnace, and starting a computer and a video camera to start acquiring an image; raising temperature according to a set program heating system, wherein a certain amount of mixture of CO, CO2, O2, N2 and H2 can be introduced in a heating process, and the proportion and flow of each gas can be controlled through a program; and calculating metallurgical performance indexes of the iron powdered ore according to change rates of shape and area of the blocky mixture of the iron powdered ore, which are shot by the video camera. Equipment is simple, the method is easy to operate, the computer is used for real-time control, the high-temperature metallurgical performance indexes of the iron powdered ore under a specific temperature control system can be calculated, and errors caused by manual operation when the conventional method is used for measuring the metallurgical performance of the iron powdered ore can be reduced.

Description

Technical field: [0001] The invention belongs to the field of blast furnace ironmaking, in particular to a method for measuring the high-temperature metallurgical properties of visualized iron ore powder. Background technique [0002] The main iron-containing raw material for blast furnace ironmaking in China is sinter. The quality of sinter has an important impact on blast furnace production, and the quality of sinter is largely limited by the iron ore powder raw material used in the sintering process. With the shortage of high-quality iron ore powder resources, some low-quality iron ore powders have entered the Chinese market, which has brought a certain impact on the sintering production of various enterprises. In addition, under the circumstances of the global financial crisis, energy conservation, emission reduction and cost reduction have become urgent problems for all enterprises. Therefore, it is necessary to carry out in-depth research on various iron ore powders f...

Claims

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Application Information

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IPC IPC(8): G01N21/85G01N11/00
Inventor 左海滨张建良国宏伟焦克新张涛
Owner UNIV OF SCI & TECH BEIJING
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