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Series elutriation deep concentration process for extremely difficult-to-separate magnetite

A magnetite and elutriation technology, which is applied in the field of mineral processing, can solve the problems that the refractory magnetite concentrate cannot reach the standard, and achieve the effect of improving the sorting environment and reducing the viscosity of the pulp

Inactive Publication Date: 2020-10-02
ANHUI MASTEEL MINING RESOURCES GRP NANSHAN MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a series elutriation depth concentration process for extremely refractory magnetite, which adopts two-stage elutriation magnetic separation for refractory magnetite or extremely refractory magnetite with extremely fine particle Step by step removal of slime, gangue and intergrowth, to solve the problem that the extremely difficult magnetite concentrate cannot meet the standard

Method used

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  • Series elutriation deep concentration process for extremely difficult-to-separate magnetite
  • Series elutriation deep concentration process for extremely difficult-to-separate magnetite
  • Series elutriation deep concentration process for extremely difficult-to-separate magnetite

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Embodiment 1

[0038] The above ore is sorted by adopting the technique of the present invention, and the technological process is as follows figure 1 As shown, the steps are:

[0039] 1) Feed the raw ore crushed below 16mm into the first stage of mill, and carry out a stage of grinding and classification operations to obtain a stage of graded overflow pulp and sand settling. The sand is returned to the first-stage mill for closed-circuit grinding;

[0040] 2) One section of graded overflow is given to one section of magnetic separation, and the field strength of one section of magnetic separation is 2500Oe to obtain one section of magnetic separation concentrate and one section of magnetic separation tailings;

[0041] 3) Put the first-stage magnetic separation concentrate into the second-stage grinding, and carry out the second-stage grinding and classification operation to obtain the second-stage classification overflow pulp and sand settling. The fineness of the overflow pulp is -0.074 ...

Embodiment 2

[0060] The current common "stage grinding-stage weak magnetic separation-concentrate elutriation magnetic separation process" is adopted for raw ore samples. The process flow is as follows figure 2 As shown, the steps are:

[0061] 1) Feed the raw ore crushed below 16mm into the first stage of mill, and carry out a stage of grinding and classification operations to obtain a stage of graded overflow pulp and sand settling. The sand is returned to the first-stage mill for closed-circuit grinding;

[0062] 2) One section of graded overflow is given to one section of magnetic separation, and the field strength of one section of magnetic separation is 2500Oe to obtain one section of magnetic separation concentrate and one section of magnetic separation tailings;

[0063] 3) Put the first-stage magnetic separation concentrate into the second-stage grinding, and carry out the second-stage grinding and classification operation to obtain the second-stage classification overflow pulp ...

Embodiment 3

[0079] The raw ore samples are sorted by "open circuit series elutriation process". The process flow is as follows: image 3 As shown, the steps are:

[0080] 1) Feed the raw ore crushed below 16mm into the first stage of mill, and carry out a stage of grinding and classification operations to obtain a stage of graded overflow pulp and sand settling. The sand is returned to the first-stage mill for closed-circuit grinding;

[0081] 2) One section of graded overflow is given to one section of magnetic separation, and the field strength of one section of magnetic separation is 2500Oe to obtain one section of magnetic separation concentrate and one section of magnetic separation tailings;

[0082] 3) Put the first-stage magnetic separation concentrate into the second-stage grinding, and carry out the second-stage grinding and classification operation to obtain the second-stage classification overflow pulp and sand settling. The fineness of the overflow pulp is -0.074 and the par...

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Abstract

The invention relates to the technical field of mineral processing, and discloses a series elutriation deep concentration process for extremely difficult-to-separate magnetite. According to the invention, an elutriation magnetic separation process is connected in series for the first time, and an elutriation magnetic separator performs one-time rough separation and one-time fine separation on middlings, and then returns to a regrinding closed-loop cyclic separation process; and the process has the following beneficial effects that (1) slime and gangue are removed through one-stage elutriationand magnetic separation, so that the concentrate grade is improved once, the pulp viscosity is reduced, and the subsequent separation environment is improved; and (2) 85%-95% of intergrowth bodies areremoved through two-stage elutriation and magnetic separation, so that the concentrate grade is increased to 65% or above; and (3) the second-stage elutriation and magnetic separation tailings serveas middlings to be fed into a vertical mill to be reground, the ore discharging fineness of the vertical mill is -0.043 mm, the particle size content is larger than or equal to 90%, the iron mineral monomer dissociation degree is larger than 85%, and it can be guaranteed that the concentrate grade reaches 65% or above after reselection.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a process for series elutriation and deep concentration of extremely difficult magnetite. Background technique [0002] After the full implementation of the policy of replacing mine tailings and waste rocks in concrete to produce sand and gravel, with the rapid economic development, there is a vacancy in the demand for a large number of sand and gravel aggregates. Development and applications are exploited. Magnetite ore concentrators widely use crushing and ultra-fine crushing and throwing techniques to obtain a large amount of sand and gravel aggregates, which greatly reduces the amount of ore entering the grinding and the cost of beneficiation, making the magnetite resources poor, fine, miscellaneous, etc. The characteristics are becoming more and more prominent, and the refractory magnetite, even the extremely refractory magnetite, can also be mined and utilized. ...

Claims

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Application Information

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IPC IPC(8): B03C1/30B03B9/00B03B7/00
CPCB03C1/30B03B9/00B03B7/00
Inventor 陈于海胡佛明王本治汪成程传麟卜维平沈远海吴国军
Owner ANHUI MASTEEL MINING RESOURCES GRP NANSHAN MINING CO LTD
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