Corn starch pretreatment-unusual medium magnetic separation process

A corn starch and pretreatment technology, applied in magnetic separation, high gradient magnetic separator, solid separation, etc., can solve the problems of loss of iron ore resources, sorting of difficult mineral resources, etc. simple structure

Inactive Publication Date: 2018-10-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron ore resources that are easy to be processed in my country are decreasing year by year, but there are abundant reserves of weakly magnetic iron ore resources embedded with fine particles. Since the embedded particle size of useful minerals in this part of resources is often less than 20 μm, it is difficult to adopt conventional mineral processing equipment and mineral processing technology. Realize effective sorting of these mineral resources, so that a large amount of iron ore resources will be lost during the sorting process

Method used

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  • Corn starch pretreatment-unusual medium magnetic separation process
  • Corn starch pretreatment-unusual medium magnetic separation process
  • Corn starch pretreatment-unusual medium magnetic separation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Get two parts of TFe grades and be respectively 26.85%, 26.71%, concentration is 33%, particle size is - 0.038mm accounts for more than 95% ore pulp containing weak magnetic iron minerals, under the condition that stirring speed is 1000r / min, add The NaOH solution with a mass concentration of 2% was stirred at a constant speed for 5 minutes, and the pH value of the pulp was adjusted to 10.0.

[0034] (2) Reduce the stirring speed to 650r / min, add cornstarch solution which has selective flocculation effect on iron minerals to the two pulps, and stir at a constant speed for 5min, so that the iron minerals in the pulp can pass through the bridging effect of cornstarch Weakly magnetic iron mineral flocs with certain strength and moderate size are formed, thereby increasing the capture probability of iron minerals in the magnetic separation process, wherein the mass ratio of the pulp to cornstarch solution is 60:1.

[0035] (3) One part of the pulp is fed to the vertical...

Embodiment 2

[0038] (1) Get two parts of TFe grades and be respectively 26.85%, 26.71%, concentration is 33%, particle size is - 0.038mm accounts for more than 95% ore pulp containing weak magnetic iron minerals, under the condition that stirring speed is 1000r / min, add The NaOH solution with a mass concentration of 2% was stirred at a constant speed for 5 minutes, and the pH value of the pulp was adjusted to 9.5.

[0039] (2) Reduce the stirring speed to 650r / min, add cornstarch solution which has selective flocculation effect on iron minerals to the two pulps, and stir at a constant speed for 5min, so that the iron minerals in the pulp can pass through the bridging effect of cornstarch Weakly magnetic iron mineral flocs with certain strength and moderate size are formed, thereby increasing the capture probability of iron minerals in the magnetic separation process, wherein the mass ratio of the pulp to cornstarch solution is 40:1.

[0040] (3) One part of the pulp is fed to the vertical ...

Embodiment 3

[0043] (1) Get two parts of TFe grades and be respectively 26.85%, 26.77%, concentration is 30%, particle size is - 0.038mm accounts for more than 95% ore pulp containing weak magnetic iron minerals, under the condition that stirring speed is 1000r / min, add The NaOH solution with a mass concentration of 2% was stirred at a constant speed for 5 minutes, and the pH value of the slurry was adjusted to 9.0.

[0044] (2) Reduce the stirring speed to 600r / min, add cornstarch solution to one part of the pulp, and stir at a constant speed for 5min, so that the iron minerals in the pulp can form a weak magnetic iron with a certain strength and a moderate size through the bridging effect of cornstarch. Mineral flocs, thereby increasing the capture probability of iron minerals in the magnetic separation process, wherein the mass ratio of the pulp to the cornstarch solution is 40:1; the other part of the pulp does not add cornstarch solution, and stirs at a constant speed for 5min .

[0...

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Abstract

The invention relates to a corn starch pretreatment-unusual medium magnetic separation process and belongs to the technical field of mineral processing. The corn starch pretreatment-unusual medium magnetic separation process comprises the steps of pulp mixing, weak magnetic iron mineral flocculation pretreatment, magnetic separation and scavenging, wherein the magnetic separation step is that strong magnetic separation work is carried out on obtained pretreated ore pulp through a vertical ring pulsating high gradient magnetic separator with an elliptic unusual magnetic medium box under the condition that the background field intensity is 5,000 oersted-10,000 oersted, the pulsation stroke is 0 mm-20 mm and the pulsation frequency of stroke is 0-250 per minute, a strong magnetic separation magnetic product is obtained, and the cross section of the unusual magnetic medium box is provided with saw teeth. Compared with an existing intensifying micro-fine particle weak magnetic iron mineralrecovering process, the method has the advantages of being high in iron recovering rate, low in composite cost, simple in flowage structure and the like.

Description

technical field [0001] The invention relates to a cornstarch pretreatment-special-shaped medium magnetic separation process, which belongs to the technical field of mineral processing. Background technique [0002] With the continuous acceleration of industrialization and modernization, my country's demand for iron ore continues to increase, and a large number of high-quality iron ore resources are constantly being developed and utilized, resulting in the characteristics of poor, fine and miscellaneous domestic iron ore resources becoming more and more obvious. At present, iron ore resources that are easy to be processed in my country are decreasing year by year, but there are abundant reserves of weakly magnetic iron ore resources embedded with fine particles. Since the embedded particle size of useful minerals in this part of resources is often less than 20 μm, it is difficult to adopt conventional mineral processing equipment and mineral processing technology. Realize effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/034B03C1/005
CPCB03C1/034B03C1/005
Inventor 韩跃新李文博周立波李艳军
Owner NORTHEASTERN UNIV
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