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Method and device for testing assimilability of iron ore powder

A test method and test device technology, applied in the field of sintering, can solve the problems of inability to accurately reflect the assimilation performance of iron ore powder

Active Publication Date: 2014-01-22
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method only judges the assimilation ability of iron ore powder by calculating the reaction amount on the two-dimensional plane, but due to the uncertainty of the reaction direction, the measurement results of this method often cannot accurately reflect the assimilation performance of iron ore powder

Method used

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  • Method and device for testing assimilability of iron ore powder

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0025] Such as figure 1 The shown iron ore powder assimilation test device includes an infrared heating furnace 1, a quartz protection sleeve 6 is arranged in the infrared heating furnace 1, and a waste gas outlet 8 is arranged on the top of the protection sleeve 6, and the inside of the protection sleeve 6 is There is a sample lifting platform 3, the top of the sample lifting platform 3 is provided with a top thermocouple 4, the bottom of the sample lifting platform 3 is provided with a bottom thermocouple 5, and the protective sleeve 6 is connected with a gas switch Valve 7, protective sleeve 6 are connected to the output end of gas switching valve 7, and the input end of gas switching valve 7 is connected with nitrogen cylinder 11 and air pump 10 in parallel, between nitrogen cyli...

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Abstract

The invention discloses a method and a device for testing assimilability of iron ore powder. The method comprises the steps as follows: the iron ore powder and lime are calcined firstly, and the sintering process is simulated; then the assimilative lime amount is tested; and finally, the assimilation data of the iron ore powder is obtained according to a ratio of the assimilative lime amount to the assimilative area of the iron ore powder, so that the assimilability of the iron ore powder is represented. According to the method and the device for testing the assimilability of the iron ore powder, in consideration of the phenomenon that the assimilative capacity and the assimilative speed can be represented by the thickness change of a product due to uncertainty of the reaction direction in a sintering process, the thickness of the reaction product is adopted as an evaluation basis of the assimilability of the iron ore powder, and the three-dimensional assimilation data is obtained by testing the ratio of the assimilative lime amount to the assimilative surface area, so that the assimilability of different types of iron ore powder is represented and distinguished accurately, data of the assimilative speed and the assimilative temperature sensibility can be obtained accurately, and accordingly, the temperature sensibility of the assimilation reaction of the iron ore powder as well as the assimilation speeds of different types of iron ore powder under the same test condition are reflected accurately.

Description

technical field [0001] The invention relates to the technical field of sintering, in particular to a method for testing the assimilability of iron ore powder and a device thereof. Background technique [0002] Iron ore powder is the main material for sintering. The research on the high-temperature basic sintering performance of iron ore powder mainly focuses on high-temperature assimilation characteristics, flow characteristics, bonding strength, and crystal connection characteristics. The performance test is used to study the liquid phase generation ability and bonding effect of iron ore powder in the high temperature sintering process. The test results can provide a basis for the adjustment of the ratio of iron ore powder for sintering production, so as to improve the mixing of sintering powder The purpose of sintering performance is to provide a guarantee for the supply of sinter powder with stable quality to the blast furnace. Among them, assimilability is an important ...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 肖志新陈令坤王素平胡正刚文志军
Owner 武汉钢铁有限公司
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