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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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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 particle sizes in the sintering process under the condition of the original iron ore particles. The method of testing the high-temperature performance of iron ore powder due to different functions that may be played, and the testing data is objective and accurate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0028] A method for detecting the high-temperature performance of iron ore powder, the steps of which are:

[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 larger than 3mm, 1-3mm, and smaller than 1mm Wherein the percentage by weight of specularite powder with particle size less than 1mm reaches 61.3%, which is used as testing material;

[0030] 2) The specularite powder with particle size less than 1mm contains SiO 2 is 4.24%, so by adding pure calcium oxide, its alkalinity reaches 0 and 1.0 respectively, and the specularite powder and pure calcium oxide are mixed uniformly; The total weights are 68.7 g and 70.5 g respectively;

[0031] 3) In the specularite powder with alkalinity reaching 0 and 1.0 respectively, add organic binder according to 5% of the...

Embodiment 2

[0045] The ore is specularite, and the alkalinity of the test is 2.0 and 3.0.

[0046] And the method for detecting the high-temperature performance of specularite powder, the 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 larger than 3mm, 1-3mm, and smaller than 1mm Wherein the percentage by weight of specularite powder with particle size less than 1mm reaches 61.3%, which is used as testing material;

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

[0049] 3) In the specularite powder with alkalinity reaching 2.0 and 3.0 respectively, ad...

Embodiment 3

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

[0063] The method for detecting 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, that is, it is divided into particle sizes larger than 3mm, 1-3mm, and smaller than 1mm ; Wherein the particle size is 1-3mm and +3mm iron ore powder weight percentage reaches 32.8% and 35.4% respectively, it is used as testing material;

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

[0066] 3) In the limonite powder with a particle size of...

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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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