Method for detecting balling performance of iron ore concentrates

A detection method and technology for iron ore concentrate, applied in the field of iron and steel metallurgy, can solve the problems that cannot be used to evaluate the spheroidizing performance of iron ore concentrate, poor corresponding relationship, etc., and achieve the effect of improving the quality of green spheroids and optimizing the structure of raw materials

Active Publication Date: 2012-08-15
CENT SOUTH UNIV
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Problems solved by technology

However, this evaluation method has the following problems: ①The corresponding relationship with the green pellet strength is poor; ②It cannot truly reflect the specific influence of raw material properties on the pelletizing performance, and cannot provide theoretical guidance for improving the pelletizing performance of iron concentrates
The above formula quantitatively analyzes the i

Method used

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  • Method for detecting balling performance of iron ore concentrates
  • Method for detecting balling performance of iron ore concentrates
  • Method for detecting balling performance of iron ore concentrates

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Embodiment example

[0059] 10 representative iron ore concentrates were selected to test the ball forming performance and green ball strength respectively. Table 1 is the main chemical composition of 10 examples. The results of the maximum molecular water and maximum capillary water, natural bulk density and true density, calculated porosity and average particle size of the 10 examples are shown in Table 2, where the maximum molecular water was detected by centrifugation and pressure filtration respectively. The green ball strength, ball forming index K value, ball forming performance N value and their respective evaluation grades of the 10 examples are shown in Table 3, where the division standard of K: K0.8 is excellent ball forming.

[0060] The chemical composition of table 1 raw material (the unit of data in the table is: wt / %)

[0061]

[0062] The physical and chemical properties of table 2 raw materials

[0063]

[0064] Table 3 Green pellet strength and pelletizing performance of...

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Abstract

The invention discloses a method for detecting the balling performance of iron ore concentrates, comprising the following steps of: measuring the maximum molecular water of the iron ore concentrates by using a centrifugation method; measuring the maximum capillary water of the iron ore concentrates by using a saturated water absorption method; measuring the bulk density and the true density of the iron ore concentrates and calculating porosity; calculating the average particle diameter of the iron ore concentrates by using a laser granulometer; and calculating the balling performance of the iron ore concentrates by using a formula and giving out an evaluation order. The method has the characteristics that operation is simple, scientific and reasonable and has certain theoretical direction significance to the iron ore concentrate dosing operation. When the average particle diameter of the iron ore concentrates is less than 60 mu m, 200-mesh or 325-mesh raw materials are adopted for replacement, and the reliability of an estimation method is not affected by the average particle diameter.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and in particular relates to a method for detecting the pelletizing performance of iron concentrate during pellet preparation. Background technique [0002] Due to its high cold strength and superior metallurgical properties, pellets are increasingly used as iron-containing charge in the iron and steel industry. my country's pellets have developed rapidly, and the output has increased from about 59 million tons in 2005 to 110 million tons in 2010. The production of pellets usually includes the preparation of green pellets, drying preheating, roasting and cooling. Good quality of green pellets is an important basis to ensure the stability of subsequent processes and the quality of pellets. [0003] The so-called ball-forming performance of raw materials refers to the ability of finely ground materials to form balls under the natural state and the dense ability under the action of mechani...

Claims

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Application Information

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IPC IPC(8): G01N9/02G01N5/02G01N15/02
Inventor 陈许玲杨桂明范晓慧甘敏袁礼顺姜涛李光辉郭宇峰杨永斌黄柱成李骞张元波白国华许斌
Owner CENT SOUTH UNIV
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