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Combined reagent for reverse flotation of microgranular iron ore magnetic concentrate and application method thereof

A technology of magnetic separation concentrate and combined reagents, which is applied in flotation, solid separation, etc., can solve the problem of low index of reverse flotation concentrate, and achieve the effect of convenient preparation, simple operation and low price

Inactive Publication Date: 2015-10-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems and deficiencies in the above-mentioned prior art, the present invention provides a reverse flotation combination agent for fine-grained iron ore magnetic separation concentrate and its application method, which can effectively solve the problem of fine-grain iron ore magnetic separation concentrate Due to the agglomeration or cover of fine particles in the medium, the problem of low reverse flotation concentrate index is caused by the present invention through the following technical solutions

Method used

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  • Combined reagent for reverse flotation of microgranular iron ore magnetic concentrate and application method thereof
  • Combined reagent for reverse flotation of microgranular iron ore magnetic concentrate and application method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The application method of the microfine iron ore magnetic separation concentrate reverse flotation combination agent, its specific steps are as follows:

[0024] (1) After the iron ore with Fe grade of 25-32wt% is crushed and ground to a fineness of less than 74μm, which accounts for more than 95% of the total material weight, magnetic separation is used to obtain a magnetic separation concentrate with an iron grade of 42.88wt%; the magnetic separation concentrate The useful iron minerals in the ore are hematite and a small amount of magnetite and siderite. The gangue minerals are mainly quartz, chlorite and a small amount of ferrodolomite that is easy to muddy. The chemical multi-element analysis results are shown in Table 1.

[0025] Table 1 Chemical multi-element analysis of magnetic separation concentrate

[0026]

[0027] (2) Adjust the magnetic separation concentrate obtained in step (1) into a slurry with a weight percentage concentration of 35%~40% for revers...

Embodiment 2

[0034] Such as figure 1 As shown, the application method of the microfine iron ore magnetic separation concentrate reverse flotation combination agent, its concrete steps are as follows:

[0035] (1) After the iron ore with Fe grade of 25-32wt% is crushed and ground to a fineness of less than 74μm, which accounts for more than 95% of the total material weight, magnetic separation is used to obtain a magnetic separation concentrate with an iron grade of 42.88wt%; the magnetic separation concentrate The useful iron minerals in the ore are hematite and a small amount of magnetite and siderite. The gangue minerals are mainly quartz, chlorite and a small amount of ferrodolomite that is easy to muddy. The chemical multi-element analysis results are shown in Table 1.

[0036] Table 1 Chemical multi-element analysis of magnetic separation concentrate

[0037]

[0038] (2) Adjust the magnetic separation concentrate obtained in step (1) into a slurry with a weight percentage concent...

Embodiment 3

[0045] Such as figure 1 As shown, the application method of the microfine iron ore magnetic separation concentrate reverse flotation combination agent, its concrete steps are as follows:

[0046] (1) After the iron ore with Fe grade of 25-32wt% is crushed and ground to a fineness of less than 74μm, which accounts for more than 95% of the total material weight, magnetic separation is used to obtain a magnetic separation concentrate with an iron grade of 42.88wt%; the magnetic separation concentrate The useful iron minerals in the ore are hematite and a small amount of magnetite and siderite. The gangue minerals are mainly quartz, chlorite and a small amount of ferrodolomite that is easy to muddy. The chemical multi-element analysis results are shown in Table 1.

[0047] Table 1 Chemical multi-element analysis of magnetic separation concentrate

[0048]

[0049] (2) Adjust the magnetic separation concentrate obtained in step (1) into a slurry with a weight percentage concent...

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Abstract

The invention relates to a combined reagent for reverse flotation of microgranular iron ore magnetic concentrate and an application method thereof, and belongs to the technical field of mineral processing. In the process of reverse flotation of the microgranular iron ore magnetic concentrate, the combined reagent comprises, by flotation feed ore dry basis weight, 900-1600 g / t of sodium hydroxide as pH regulators, 50-250 g / t of citric acid as dispersing agents, 1100-1550 g / t of causticizing corn starch as iron ore inhibitors, 750-1000 g / t of calcium oxide of quartz or silicate activating agents and 1100-1600 g / t of fatty acid type collecting agents. The magnetic concentrate is obtained through magnetic separation after iron ore is smashed and levigated; the obtained magnetic concentrate is subjected to reverse flotation; the combined reagent is applied to the reverse flotation process. According to the combined reagent, the problem that as microgranular grains are gathered or cover the microgranular iron ore magnetic concentrate, the reverse flotation concentration index is low is effectively solved.

Description

technical field [0001] The invention relates to a microfine iron ore magnetic separation concentrate reverse flotation combination agent and an application method thereof, belonging to the technical field of mineral processing. Background technique [0002] my country's iron ore reserves are abundant, but they are poor, fine, and miscellaneous, and a large amount of iron ore resources have not been developed and utilized. At present, the bottleneck problem in the development and utilization of iron ore resources is that iron ore deposits tend to be miniaturized, complex and low-dilution, the grade and recovery rate of iron concentrate are low, it is difficult to meet the requirements of low-cost smelting, and the loss of iron metal is serious. At present, anion reverse flotation is a widely used process for iron ore iron ore reduction and silicon reduction, and most of them adopt the classic flotation reagent system (sodium hydroxide, causticized starch, lime, fatty acid col...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D101/06B03D101/02B03D103/02
Inventor 罗溪梅印万忠王乃玲马英强王云帆
Owner KUNMING UNIV OF SCI & TECH
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