Method for detecting high temperature performance of iron ore powder

A technology of high temperature performance and iron ore powder, applied in the field of testing the performance of sintered pellets, to achieve the effect of comprehensive performance and strong adaptability

Active Publication Date: 2015-03-25
武汉钢铁有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of existing iron ore powder high-temperature performance detection methods, the present invention proposes a method that does not need to be ground, divides iron ore into different particle sizes, and uses different particl

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0026] Example 1

[0027] The mineral is specularite, and the alkalinity of this mineral is 0 and 1.0.

[0028] A method for detecting high temperature performance of iron ore powder, and its steps:

[0029] 1) Dry the specularite powder: the drying temperature is 105°C, and the time is 2.2 hours; after drying, the specularite powder is classified into particle sizes greater than 3mm, 1-3mm, and less than 1mm. ; The weight percentage of specularite powder with a particle size of less than 1mm reaches 61.3%, and it is used as a testing material;

[0030] 2) Specularite powder with a particle size of less than 1mm contains SiO 2 It is 4.24%, so by adding pure calcium oxide to make the alkalinity reach 0 and 1.0 respectively, and mix the specularite powder and pure calcium oxide uniformly; after mixing and adjusting, the alkalinity of 0 and 1.0 The total weights are 68.7 g and 70.5 g respectively;

[0031] 3) In specularite powder with alkalinity reaching 0 and 1.0, add organic binder ac...

Example Embodiment

[0044] Example 2

[0045] The mineral is specularite, and the alkalinity of this mineral is 2.0 and 3.0.

[0046] And its method for detecting the high temperature performance of specularite powder, its steps:

[0047] 1) Dry the specularite powder: the drying temperature is 105°C, and the time is 2.2 hours; after drying, the specularite powder is classified into particle sizes greater than 3mm, 1-3mm, and less than 1mm. ; The weight percentage of specularite powder with a particle size of less than 1mm reaches 61.3%, and it is used as a testing material;

[0048] 2) Spectrinite powder with a particle size of less than 1mm contains SiO 2 It is 4.24%, so by adding pure calcium oxide to make the alkalinity reach 2.0 and 3.0 respectively, and mix the specularite powder and pure calcium oxide uniformly; after mixing and adjusting, the alkalinity of 2.0 and 3.0 are respectively The total weights are 69.2 g and 71.8 g respectively;

[0049] 3) In specularite powder with alkalinity reaching ...

Example Embodiment

[0061] Example 3

[0062] The mineral is limonite, and the tested alkalinity of this mineral is 2.0.

[0063] The method of testing its high temperature performance, its steps:

[0064] 1) Dry the limonite powder: the drying temperature is 105°C, and the time is 3 hours; after drying, the limonite powder is classified into particle sizes greater than 3mm, 1-3mm, and less than 1mm. ; Among them, the weight percentages of iron ore powder with a particle size of 1-3mm and +3mm reach 32.8% and 35.4%, respectively, and use them as testing materials;

[0065] 2) Limonite with a particle size of 1-3mm contains SiO 2 Limonite with a size of 6.34% and a particle size of +3mm contains SiO 2 It is 5.98%, so by adding pure calcium oxide to make the alkalinity reach 2.0, and mixing the limonite powder and pure calcium oxide uniformly; after mixing and adjusting, the particle size of limonite powder is 1-3mm and +3mm respectively. The total weights are 52.4 g and 54.7 g respectively;

[0066] 3) In...

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Abstract

The invention relates to a method for detecting high temperature performance of iron ore powder. The method comprises the steps of drying the iron ore powder, grading the size of the iron ore powder into a grade more than 3mm, a grade in the range of 1 to 3mm and a grade of less than 1mm; adding pure calcium oxide or calcium hydroxide for regulating alkalinity to 0, 1.0, 2.0, 3.0 according to SiO2 amount in the iron ore powder; adding an organic adhesive and water, stirring the organic adhesive, water and the iron ore powder to obtain a mixture, and pressing the mixture into cakes; heating the cakes in different temperature sections, and judging the difficulty in generating a liquid phase; calculating a fluidity index of the liquid phase, and judging the high temperature performance. Since the high temperature performance of the iron ore powder is determined under the condition of original particles of iron ore, the detection data is instructive and high in applicability; moreover, since the data in a series of alkalinity range is detected, the reflected performance is more comprehensive.

Description

technical field [0001] The invention relates to a method for detecting the performance of sintered pellets, in particular to a method for detecting the high-temperature performance of iron ore powder. Background technique [0002] The research on the high temperature properties of iron ore has a strong guiding significance for the study of the behavior of iron ore under high temperature conditions in the sintering process. At present, there are only two methods used by Beijing University of Science and Technology and Central South University in this regard, and the steps are basically the same: that is, iron ore powder and analytically pure Ca(OH) 2 The reagent is made into fine powder (-100 mesh), mixed with water and pressed into a small cake with a diameter of 8mm under a certain pressure; the small cake is pushed into a tubular roaster or an infrared assimilation furnace according to a certain roasting temperature and roasting time After the experiment, take out the sin...

Claims

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Application Information

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IPC IPC(8): G01N25/00
Inventor 史先菊李军冯红云肖扬莫亚平孙庆星石伟罗之礼张树华张江鸣
Owner 武汉钢铁有限公司
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