Method for judging granulation selectivity strength among different iron ore powder particles

An iron ore powder, selective technology, applied in the direction of analysis materials, measuring devices, instruments, etc., can solve problems such as the influence of the sintering process, and achieve the effect of strong operability and strong guiding significance

Active Publication Date: 2020-05-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core particles are large and can be distributed evenly during the mixing and granulation process; due to the difference in sphericity, the adhesion particles have different chances and degrees of adhesion to other particles, so there are differences in the distribution during the granulation process. , which ultimately affects the sintering process

Method used

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  • Method for judging granulation selectivity strength among different iron ore powder particles
  • Method for judging granulation selectivity strength among different iron ore powder particles

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Comparison scheme
Effect test

Embodiment 1

[0046] A method for judging the granulation selectivity strength between different iron ore powder particles of the present invention comprises the following steps:

[0047] 1) Take 1kg of iron ore powder A and 2kg of iron ore powder B. Iron ore powder A is Canadian fine ore in the specularite category, and iron ore powder B is Caragas fine ore in the hematite category , after drying in an oven above 100°C, use a standard sieve to screen out different particle sizes, and take the particles with a particle size of 0A = 0.25mm and D B =4mm, for use.

[0048] 2) The selected iron ore powder A with a particle size of 0 A =0.0061mm, DM A = 0.0712mm and DF B =0.0149mm, DM B = 0.0873 mm.

[0049] 3) Judging the quality of the selectivity strength when the particles with a particle size of 0

[0050] According to the a...

Embodiment 2

[0056] A method for judging the granulation selectivity strength between different iron ore powder particles of the present invention comprises the following steps:

[0057] 1) Get the iron ore powder A of 1.5kg and the iron ore powder B of 1kg, the iron ore powder A is the Canadian powder ore in the specularite category, and the iron ore powder B is the king's powder ore in the limonite category, After drying in an oven above 100°C, use a standard set of sieves to screen out different particle sizes, and take the particles of 0A = 0.25mm and D B =0.25mm, for use.

[0058] 2) The selected particles of iron ore powder A with a particle size of 0A =0.0061mm, DM A = 0.0712mm and DF B =0.0254mm, DM B = 0.0849mm.

[0059] 3) Judging whether the particles of iron ore powder A with a particle size of 0

...

Embodiment 3

[0066] A method for judging the granulation selectivity strength between different iron ore powder particles of the present invention comprises the following steps:

[0067] 1) get the iron ore powder A of 2kg and the iron ore powder B of 3kg, the iron ore powder A is the Yangdi powder ore in the limonite category, and the iron ore powder B is the king's powder ore in the limonite category, After drying in an oven above 100°C, use a standard set of sieves to screen out different particle sizes, and take the particles of 0A = 0.25mm and D B =0.25mm, for use.

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Abstract

The invention discloses a method for judging the granulation selectivity strength between different iron ore powder particles. The method comprises the following steps: (1) taking a certain size fraction of iron ore powder A and iron ore powder B, and calculating the average particle sizes DA and DB of the iron ore powder A and the iron ore powder B at the corresponding size fractions; (2) calculating the maximum molecular water film thicknesses DFA and DFB and the maximum capillary water film thicknesses DMA and DMB of fraction samples taken from the iron ore powder A and the iron ore powderB; (3) calculating values of DMA / DA and DMB / DB, and judging whether the selective strength is good or bad when the iron ore powder A and the iron ore powder B are used as adhesive particles at the same time; and (4) calculating the value of |DMA-DMB|, comparing |DMA-DMB|, DFA and DFB, and judging the mutual selective strength during the contact granulation of the iron ore powder A and the iron orepowder B. The method is high in operability, can quantitatively judge the selection behavior of the particles in the iron ore powder granulation process, and has high practical significance in deeplyresearching the behavior of the iron ore powder particle granulation process.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgical sintering pellets, and in particular relates to a method for judging the selective strength of granulation among different iron ore powder particles. Background technique [0002] With the rapid increase of production capacity in the iron and steel industry, the demand for iron ore has also increased significantly, resulting in a wide variety of iron ore powders used in sintering in various steel companies, and the mixed ore blending structure is becoming more and more complicated. A kind of ore blending structure There are as many as seven or eight kinds of iron ore powders used in iron ore. There are great differences in the properties of iron ore powders, so the distribution of iron ore in the mixture has a great influence on the sintering process. The distribution state of iron ore fines is mainly determined by the mixing granulation process, which is mainly affected by the iron or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01B21/08
CPCG01N15/00G01B21/08
Inventor 刘代飞史先菊付强李军陈志盛
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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