Pre-magnetization magnetic seed magnetic separation method

A magnetic seed and pre-magnetization technology, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of magnetic mineral attachment and accumulation, high power consumption, etc., and achieve the effect of improving the recovery rate of magnetic separation and obvious economic benefits

Inactive Publication Date: 2015-05-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pre-magnet works under high magnetic field strength (1T), and can only be excited by electric energy, which will undoubtedly generate high power consumption. In addition, high field strength is easy to cause the adhesion and accumulation of magnetic minerals on the pre-magnetic slurry tube.

Method used

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  • Pre-magnetization magnetic seed magnetic separation method
  • Pre-magnetization magnetic seed magnetic separation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Oxidized ore pre-magnetic magnetic seed magnetic separation, with weak magnetic iron oxide ore as test sample: magnetic seed is synthetic Fe 3 o 4 Particles, average particle size 2μm. Take finely ground 100g of a certain weak magnetic iron oxide ore in a beaker, add 200ml of water to adjust the slurry, add magnetic seeds (amount variable 0 g / t-750 g / t), pre-magnetic stirring or direct stirring for 3 minutes, Enter the strong magnetic separator (1.5T) to carry out two sets of series comparison tests of magnetic seed magnetic separation and pre-magnetic magnetic seed magnetic separation with the amount of magnetic seed as a variable. The so-called pre-magnetization is the pre-magnetization effect of stirring in a magnetic field with a field strength of 0.2T before the strong magnetic separation. Test results such as figure 2 shown. It can be seen that with the increase of the amount of magnetic seeds, at the same amount of magnetic seeds, the concentrate g...

Embodiment 2

[0026] Embodiment 2 Oxidized ore pre-magnetic magnetic seed magnetic separation, the impact of pre-magnetic field strength: sample and test method are the same as the above example 1, but the fixed magnetic seed consumption is 500g / t, and the effect of pre-magnetic magnetic seed magnetic separation on the pre-magnetic magnetic seed is investigated Influence, the results are shown in Table 1, from which we can see the effect of the pre-magnetic field.

[0027] Table 1 Pre-magnetization magnetic seed magnetic separation (magnetic seed dosage 500g / t, pre-magnetization time 5min, strong magnetic separation field strength 1.5T)

[0028] Pre-magnetic field strength (T) Magnetic concentrate yield (%) Concentrate grade (Fe,%) Recovery rate (Fe,%) 0.0 53.16 43.22 69.67 0.05 61.79 / / 0.1 62.05 42.23 79.45 0.2 60.32 43.10 78.83

Embodiment 3

[0029] Embodiment 3 The pre-magnetic magnetic seed magnetic separation of weak magnetic iron oxide tailings, the interaction of magnetic seed, medicament and pre-magnetic: the sample is the tailings (containing 25.96% iron) produced through iron ore strong magnetic separation, and the test The method is the same as the above example 1, except that in one of the tests, the drug starch is added at the same time as the magnetic seed is added, and the pre-magnetic field strength is fixed at 0.2T. The test results are shown in Table 2 below. It can be seen that the recovery rate of pre-magnetic magnetic seed magnetic separation is higher than that of direct strong magnetic separation, and the recovery rate of pre-magnetic magnetic seed magnetic separation with medicament starch is higher.

[0030] Table 2 Pre-magnetic magnetic seed magnetic separation (pre-magnetic field strength 0.2T, pre-magnetic time 5min, strong magnetic field strength 1.5T)

[0031] Magnetic seed do...

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Abstract

The invention discloses a pre-magnetization magnetic seed magnetic separation method, belonging to the field of magnetic separation. The method comprises the steps of selecting fine grinded natural magnetic iron ore, reduced magnetic iron ore or synthetic magnetic ferrite or other ferromagnetic materials as the magnetic; directly adding water into to-be-magnetically-separated fine particles to form pulp, or according to ore embedding particle size, crushing ores, fine grinding with water until useful ore monomer is separated, obtaining ore pulp, finally carrying out magnetic separation in magnetic separation equipment. The magnetic seed and pre-magnetization operation are added during the magnetic separation pulping process. By magnetization of the magnetic seed to the surface of a target ore, the magnetism of the ore is enhanced; with the pre-magnetization in low magnetic field, the magnetic action force of the magnetic seed and the ore is enhanced, and therefore the magnetic separation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a pre-magnetic magnetic seed magnetic separation method. Background technique [0002] Due to the characteristics of fine-grained weak magnetic minerals such as fine particle size and weak magnetic force, it is difficult to obtain good recovery results by conventional magnetic separation methods. In order to solve this problem, the surface magnetization method was introduced into magnetic separation, mainly through adding magnetic species into the pulp to achieve surface magnetic enhancement of weakly magnetic minerals. Chinese patent CN103934099A discloses a method for reducing the magnesium content in pentlandite concentrate, by adding surface modifiers such as sodium hexametaphosphate to the pentlandite concentrate, and stirring to make the slurry evenly dispersed; then adding the amount of ore 2%~5% of -10 micron magnetic seeds and surfactants make the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/01B03C1/00
Inventor 伍喜庆戴川谢鑫
Owner CENT SOUTH UNIV
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