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In-situ online characterization method for structural characteristics of micro-fine particle iron mineral aggregate

A technology for structural characteristics and iron minerals, applied in the field of in-situ online characterization of the structural characteristics of fine-grained iron mineral aggregates, can solve the problems that the structural characteristics of iron mineral aggregates cannot be observed and controlled in situ in real time, and achieve the acquisition speed Fast, high-accuracy results

Pending Publication Date: 2021-11-30
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an in-situ online characterization method for the structural characteristics of fine-grained iron ore aggregates, aiming to solve the problem that the structural characteristics of iron mineral aggregates cannot be observed and adjusted in situ in real time during the sorting process of fine-grained iron ore agglomerates

Method used

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Experimental program
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Effect test

Embodiment approach

[0019] The fine-grained specularite samples in Gansu area were taken for stirring and slurry mixing. The particle size of the ore samples was -0.038mm, accounting for 87.68%, the average particle size was 12.38μm, and the TFe grade in the ore samples was 30.54%. SiO 2 The content is 58.61%, and the content of other elements is 10.85%, which is separated by agglomeration magnetic separation process. The specific implementation method of the in-situ online characterization method for the structural characteristics of fine-grained iron mineral aggregates is as follows:

[0020] (1) Add the ore sample into the stirring tank to adjust the pH value of the ore pulp to 9.0, and the stirring speed is 750r / min. Add 150g / t of modified tapioca starch according to the mass of the ore sample to agglomerate and adjust the pulp. After stirring for 3 minutes, a small part of the ore pulp Use a centrifugal pump to pour into a transparent mixing tank made of resin material for stirring to preven...

Embodiment 2

[0025] According to the detection result of the structure characteristics of the fine-grained iron mineral aggregates in Example 1, further adjust the process parameters: increase the dosage of 100g / t of medicament, improve the stirring speed to 800r / min, the image collected by the high-speed camera under this parameter is as follows figure 1 (c) shown. The particle size composition of the mineral particles is as follows: the content of -0.038mm is reduced to 40.23%, and the average particle size of the particles is 25.26μm. According to the image analysis results, the average projected area of ​​iron mineral aggregates is 623.56 μm 2 , the fractal dimension is 1.95, and the degree of compactness is higher than that of Example 1. It can be speculated that better sorting indicators can be obtained under such process parameters.

[0026] The iron grade of the finally obtained magnetic separation concentrate is 46.53%, and the iron recovery rate is 80.56%.

Embodiment 4

[0031] The fine-grained carbonate-containing magnetic red iron ore sample in Liaoning area was taken for stirring and slurry mixing. The particle size of the ore sample was -0.038mm, accounting for 89.63%, the average particle size was 15.34μm, and the TFe grade in the ore sample was 32.14%. , the content of SiO2 is 63.78%, and the content of other elements is 4.08%, which is selected by agglomeration magnetic separation process. The specific implementation method of the in-situ online characterization method for the structural characteristics of fine-grained iron mineral aggregates is as follows:

[0032] (1) Add the ore sample into the stirring tank to adjust the pH value of the ore pulp to 10.0, and the stirring speed is 900r / min. Add 200g / t of modified tapioca starch according to the mass of the ore sample to agglomerate and adjust the pulp. After stirring for 3 minutes, a small part of the ore pulp Use a centrifugal pump to pump into a transparent mixing tank made of resi...

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Abstract

The invention belongs to the field of mineral separation, and particularly relates to an in-situ online characterization method for structural characteristics of a micro-fine particle iron mineral aggregate. According to the method, a high-speed camera shooting technology and a focused light beam reflection real-time measurement technology are adopted to carry out real-time acquisition on image characteristics and particle size composition conditions of iron mineral aggregates in the micro-fine particle iron mineral agglomerating and size mixing process, and then an image analysis technology is combined to carry out real-time characterization on structural characteristics of the micro-fine particle iron mineral aggregates. The method has the characteristics of high acquisition precision and high acquisition speed. Real-time monitoring is carried out in the large-scale continuous production process of a dressing plant, on-line real-time regulation and control are carried out on a mineral aggregate structure by adjusting process parameters according to a characterization result collected in real time and a separation index, and therefore the process parameters of an agglomeration separation process with the better separation index are selected out. Technical support is provided for application of the micro-fine particle iron ore agglomeration separation technology, and efficient development and utilization of micro-fine particle complex refractory iron ore resources are achieved through the agglomeration separation technology.

Description

technical field [0001] The invention belongs to the field of mineral separation, and in particular relates to an in-situ on-line characterization method for the structural characteristics of fine-grained iron mineral aggregates. Background technique [0002] my country's fine-grained complex refractory iron ore reserves are about 12 billion tons, accounting for 20% of my country's total iron ore resources. Representative iron ores include Shanxi Taigang Yuanjiacun Iron Mine, Hunan Qidong Iron Mine, and Western Hubei Oolitic Shaped hematite, Hebei Sijiaying iron mine, etc. The embedded particle size of micro-disseminated iron ore is fine, and the iron minerals in this type of iron ore need to be ground to -20 μm in order to achieve monomer dissociation. It is difficult to effectively recover the fine particles by using conventional mineral processing equipment and mineral processing technology. Iron minerals cause a large amount of loss during the sorting process. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D3/06B03B1/04G06T7/00G06T7/62G01N15/02
CPCB03D3/06B03B1/04G06T7/0004G06T7/62G01N15/0227B03D2203/02G06T2207/30136
Inventor 李文博韩跃新周立波
Owner NORTHEASTERN UNIV
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