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Method for recycling calcium fluoride from dolomite type magnetite magnetically-separated tailings

A technology for magnetic separation of tailings and magnetite, which is applied in the field of comprehensive recovery and utilization of mineral resources, can solve the problems of difficult separation of mixed minerals in tailings resource recovery, and achieves the advantages of reducing flotation cost, low usage, and improving recovery rate. Effect

Inactive Publication Date: 2018-09-21
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem of recovery of tailings resources after magnetic separation of dolomite-type magnetite and the problem of difficult separation of mixed minerals containing dolomite and fluorite, and proposes a recovery of calcium fluoride from tailings of dolomite-type magnetite magnetic separation Methods

Method used

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  • Method for recycling calcium fluoride from dolomite type magnetite magnetically-separated tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, comprises the following steps:

[0042] (1) Grinding operation:

[0043] The dolomite-type magnetite magnetic separation tailings are further finely ground to -0.074mm, accounting for 93.10%;

[0044] (2) Flotation operation:

[0045] a. Rough selection: Sodium carbonate, water glass, and aluminum sulfate are formulated into a 5% solution by mass fraction, and caustic starch and collector FX-6Y are formulated into a 5% solution by mass fraction in a constant temperature box; the concentration of the pulp is controlled at 40% , the temperature is 20°C-25°C, the pH value is 9.0-10.0; sequentially add 650g / t sodium carbonate, 650g / t water glass, 200g / t aluminum sulfate, 1000g / t caustic starch, and 1050g / t collector FX-6Y , act for two minutes respectively;

[0046] b. Sweeping: The scavenging operation is carried out at a slurry concentration of 40%, a temperature of 20°C-25°C, and a pH value of 9.0-9.5, and the roughing tailings are swept for 2 minutes to...

Embodiment 2

[0059] Embodiment 2, comprises the following steps:

[0060] (1) Grinding operation:

[0061] The dolomite-type magnetite magnetic separation tailings are further finely ground to -0.074mm, accounting for 94.54%;

[0062] (2) Flotation operation:

[0063] a. Rough selection: Sodium carbonate, water glass, and aluminum sulfate are formulated into a 5% solution by mass fraction, and caustic starch and collector FX-6Y are formulated into a 5% solution by mass fraction in a constant temperature box; the concentration of the pulp is controlled at 40% , the temperature is 20°C-25°C, the pH value is 9.0-10.0; sequentially add sodium carbonate 700g / t, water glass 650g / t, aluminum sulfate 150g / t, caustic starch 900g / t, collector FX-6Y 1000g / t , act for two minutes respectively;

[0064] b. Sweeping: The scavenging operation is carried out at a slurry concentration of 40%, a temperature of 20°C-25°C, and a pH value of 9.0-9.5, and the roughing tailings are swept for 2 minutes to obta...

Embodiment 3

[0077] Embodiment 3, comprises the following steps:

[0078] (1) Grinding operation:

[0079] The dolomite-type magnetite magnetic separation tailings are further finely ground to -0.074mm, accounting for 92.10%-96.10%;

[0080] (2) Flotation operation:

[0081] a. Rough selection: Sodium carbonate, water glass, and aluminum sulfate are formulated into a 5% solution by mass fraction, and caustic starch and collector FX-6Y are formulated into a 5% solution by mass fraction in a constant temperature box; the concentration of the pulp is controlled at 40% -45%, the temperature is 20°C-25°C, the pH value is 9.0-10.0; add sodium carbonate 700g / t, water glass 600g / t, aluminum sulfate 150g / t, caustic starch 1000g / t, collector FX- 6Y1000g / t, act for two minutes respectively;

[0082] b. Sweeping: Sweeping operation is carried out at a slurry concentration of 42%, a temperature of 20°C-25°C, and a pH value of 9.0-9.5. The roughing tailings are swept for 2 minutes to obtain the scave...

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Abstract

The invention discloses a method for recycling calcium fluoride from dolomite type magnetite magnetically-separated tailings. The method comprises the steps of 1, grinding work; 2, flotation work, wherein one time of coarse flotation, one time of sweeping and five times of refined flotation are performed; 3, calcination work; 4, acid leaching work. Compared with fluorite and dolomite obtained through traditional and simple separating flotation, better efficiency is achieved, the fluorite grade can reach 90% or above, the recycling rate is larger than 80%, the dolomite grade can reach 90% or above, the recycling rate is larger than 80%, and meanwhile a reliable scheme is provided for flotation separation of fluorite and dolomite minerals.

Description

technical field [0001] The invention belongs to the technical field of comprehensive recovery and utilization of mineral resources, and in particular relates to a method for recovering calcium fluoride from dolomite-type magnetite magnetic separation tailings. Background technique [0002] The dolomite-type magnetite is mainly produced in the Baiyan Oboxi mining area. The ore in the Baiyan Oboxi mining area is low-grade magnetite. The beneficiation ratio is large and the cost of mining and utilization is high. It is an important raw material base being developed by Baotou Steel. The tailings after iron separation by magnetic separation contain more than 10% calcium fluoride, which has great recovery value. [0003] The magnetic separation process for dolomite-type magnetite is: a dry tailing throwing, and then crushing and high-pressure roller milling treatment, the particle size is below 3mm, after a wet magnetic separation, wet separation concentrate and then grinding-wea...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B9/00B03D1/002B03D1/008B03D101/06B03D103/02
CPCB03B7/00B03B9/00B03D1/002B03D1/008B03D2201/005B03D2201/007B03D2201/06B03D2203/02
Inventor 张飞杨大兵邓孟李迪郭俊辉叶小虎张滨李洪运
Owner WUHAN UNIV OF SCI & TECH
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