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Method for improving grade of magnetic concentrate by using reagent

A technology for magnetic separation of concentrates and medicaments, which is applied to chemical instruments and methods, magnetic separation, solid separation, etc., and can solve the problem of large dosage of medicaments

Inactive Publication Date: 2012-07-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has noticed the impact of adding medicaments on magnetic separation. However, the amount of medicaments is large, and two specific medicaments must be added at the same time. It mainly solves the beneficiation of iron oxide ore, and does not involve the beneficiation of other magnetic non-ferrous minerals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1. Add 500g of mixed iron ore containing magnetite and hematite (containing 22.85% iron) with water to a solid weight concentration of 67%. After 11 minutes of ball mill grinding, the fineness is 94.31%-0.075mm. Dilute the pulp to a solid weight concentration of 35%, add polyvinylpyrrolidone as a dispersant while stirring, and then enter a magnetic separator for separation with a magnetic field strength of 0.8T. The results showed that when the dosage of polyvinylpyrrolidone was 1 mg / L, 5 mg / L, 10 mg / L, 15 mg / L and 20 mg / L, the iron grades of magnetic iron concentrate were 54.17%, 56.29%, 57.90%, 58.61% and 59.07%, the grades of magnetic concentrates rose steadily. The same ore pulp without adding any dispersant enters the magnetic separator for separation with the same magnetic field strength, and the iron-containing grade of the obtained magnetic iron concentrate is 51.84%. It can be seen that adding a certain amount of pharmaceutical polyethylene In the case...

Embodiment 2

[0018] Embodiment 2. Adopt the same pulp and magnetic separation conditions in embodiment 1 to test, add sodium carbonate 20 mg / L in the pulp, and obtain the iron content of magnetic iron concentrate grade to be 56.94%. Still taking no addition of any dispersant and entering the magnetic separator to carry out the sorting index with the same magnetic field strength as a comparison, the grade of the magnetic concentrate has been improved to a certain extent.

Embodiment 3

[0019] Embodiment 3. Adopt the same pulp and magnetic separation condition in embodiment 1 to test, difference is to add sodium carbonate 2 mg / L and polyvinylpyrrolidone 8mg / L in the pulp, obtain the magnetic iron concentrate grade iron-containing is 58.08 %. Show that the mixed drug effect is more obvious.

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Abstract

The invention discloses a method for improving the grade of a magnetic concentrate by using a reagent. Fine fraction magnetic minerals can be easily mixed with impurities in the magnetic separation process to cause a low grade of the concentrate. By the method, dispersing agents such as sodium carbonate, sodium metasilicate, sodium tripolyphosphate, sodium thiophosphate or a mixture of the sodium carbonate, the sodium metasilicate, the sodium tripolyphosphate and the sodium thiophosphate, organic dispersing agents such as starch, humic acid, polyvinylpyrrolidone, polyvinyl alcohol, a polyvinyl alcohol homolog or a mixture of the starch, the humic acid, the polyvinylpyrrolidone, the polyvinyl alcohol and the polyvinyl alcohol homolog, or organic dispersing agents and a mixed dispersing agent of the organic dispersing agents are used for preparing a 5 to 30 weight percent aqueous solution, the using amount of the aqueous solution is 1 to 50mg / L, and mineral particles are dispersed in ore pulp and then are subjected to magnetic separation, so that the grade of the magnetic concentrate is improved, and the problem of complicated processes due to a low grade of the magnetic concentrate or requirements of flotation and reconcentration after the magnetic concentration is solved. By the method, extremely good magnetic separation effects on ferromagnetic mineral resources or low-magnetic mineral resources such as various iron minerals, chromite, iron pyrite, manganese minerals, wolframite, copper sulfide ores and copper oxide cobalt ores can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mineral separation, and in particular relates to a method for improving the grade of magnetic separation concentrate. Background technique [0002] According to the specific magnetic susceptibility of minerals, magnetic minerals are divided into strong magnetic and weak magnetic minerals. Strong magnetic minerals include: magnetite, titanium magnetite, zinc iron spinel and pyrrhotite, etc.; weak magnetic minerals include: hematite, false hematite, limonite, siderite, ilmenite , chromite, manganese and hard manganese ore and other ferrous metal minerals, as well as non-ferrous metal minerals chalcopyrite, wolframite, copper cobalt oxide and so on. Concentrates can be obtained by weak magnetic separation for strong magnetic minerals; due to the development of strong magnetic separators, ferrous metal ores with coarse grain structure and weak magnetic properties can also be enriched by strong magnetic separ...

Claims

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Application Information

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IPC IPC(8): B03C1/005
Inventor 伍喜庆许鹏云伍倩瑛
Owner CENT SOUTH UNIV
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