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Separation method of each component ore in pyrite-ion adsorption type rare earth composite ore

An ion adsorption type, rare earth composite technology, applied in wet separation, solid separation, chemical instruments and methods, etc., can solve the problem that ion adsorption type rare earth resources have not been utilized yet, achieve easy solid-liquid separation, low power consumption, The effect of broadening the scope of application

Inactive Publication Date: 2016-05-25
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this type of ore mined in some mining areas is only used for sulfur (iron) separation and recovery of pyrite concentrate, and the ion-adsorbed rare earth resources have not yet been utilized.

Method used

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  • Separation method of each component ore in pyrite-ion adsorption type rare earth composite ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The ion adsorption type rare earth-pyrite compound ore extracts rare earth, reclaims the method for pyrite and clay ore, and its steps are as follows:

[0035] (1) Grinding the raw ore to -80 mesh ore accounts for 30.2% of the raw ore mass percentage. The detected ore TREO content is 1209×10 -6 , S content is 12.20%, Al 2 o 3 The content is 23.41%, SiO 2 The content is 29.52%. Ion-adsorbed rare earths in ores accounted for 56.4% of the total rare earths.

[0036] (2) Add 5.0kg of finely crushed ore into 4kg of water, add 30ml of hydrogen peroxide, stir for 30min, slowly add 0.45L of ammonia water (20ml / min) at room temperature (25°C), adjust the pH of the solution to 4.0, and continue stirring for 40min , separate the slurry from solid to liquid to obtain 3.17 liters of rare earth leachate (NH 4 + 2.51 / L, TREO content is 825mg / L, Al content is 1410mg / L, Fe content is 390mg / L, Pb content is 1.4mg / L); the filter cake is washed with 2.50 liters of water (NH 4 + 3....

Embodiment 2

[0041] The ion adsorption type rare earth-pyrite compound ore extracts rare earth, reclaims the method for pyrite and clay ore, and its steps are as follows:

[0042] (1) Grinding the raw ore to -80 mesh ore accounts for 59% of the raw ore mass percentage. The original ore TREO content is 755×10 -6 , S content is 13.72%, Al 2 o 3 Content 22.61%, SiO 2 The content is 28.73%. Ion-adsorbed rare earths accounted for 43.30% of the total rare earths in the ore.

[0043] (2) Add 5.0kg of finely crushed ore to 4.0kg of aqueous solution, add 35ml of hydrogen peroxide, and stir at room temperature (28°C) for 30 minutes; slowly add 0.7 liters of ammonia water (30ml / min) to adjust the pH of the solution to 4.6, and stir for 40 minutes Finally, add 8 mL of flocculant, continue to stir for 10 min, put the slurry into a vacuum filter tank for suction filtration, and wash with 1.7 liters of water (NH 4 + 3.0g / L, pH value 4.5) to wash the filter cake, and the washing liquid and the soak...

Embodiment 3

[0048] The ion adsorption type rare earth-pyrite compound ore extracts rare earth, reclaims the method for pyrite and clay ore, and its steps are as follows:

[0049] (1) Crushing and finely crushing the raw ore until the particle size is -80 mesh and the weight of the ore particles accounts for 49.5% of the weight of the raw ore. The detected ore TREO content is 552×10 -6 , S content is 12.70%, Al 2 o 3 The content is 25.81%, SiO 2 The content is 31.62%. Ion-adsorbed rare earths accounted for 41.69% of the total rare earths in the ore.

[0050] (2) Add 5.0kg of finely crushed ore into 4kg of water, add 40ml of hydrogen peroxide, and stir at room temperature (28°C) for 50min. Slowly add 0.70 liters of ammonia water (20ml / min), adjust the pH value of the solution to 4.5, and continue to stir for 20 minutes; add 7ml of flocculant, and stir for 8 minutes; after the solid-liquid separation of the slurry, wash with 1.80 liters of water (NH 4 + 3.5g / L, pH value 4.5) to wash t...

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Abstract

The invention provides a method for separating each component ore in a pyrite-ion adsorption type rare earth complex ore. The method comprises the following steps: grinding a raw ore until an 80-mesh ore accounts for 30-60% of the weight of the raw ore, adding into water according to a liquid-solid mass ratio of 0.8-1.5, uniformly stirring, then adding hydrogen peroxide which accounts for 0.6-0.9% of the weight of the raw ore, uniformly stirring, then adjusting the pH value of slurry to be 4.0-4.6 by adding dilute ammonia water, and uniformly stirring to obtain ore pulp; and performing solid-liquid separation on the obtained ore pulp to obtain a rare earth leaching liquid and a solid phase containing pyrite and clay minerals, then purifying the rare earth leaching liquid to prepare a rare earth compound, and performing flotation on the solid phase to obtain pyrite and the clay minerals. The method provided by the invention successfully achieves the comprehensive recycling of rare earth, pyrite and the clay minerals by adopting water as an initial leaching agent, also is simple in process and easy to operate, does not need to use ammonium sulfate chemical products in a leaching process, also can be used for producing agricultural ammonium sulfate as a by-product, and is environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of rare earth hydrometallurgy and pyrite beneficiation, in particular to a separation method for each component ore in pyrite-ion adsorption type rare earth composite ore. Background technique [0002] Southern China is rich in ion-adsorption rare earth ores (referred to as weathering crust elution-type rare earth ores, or ion-type rare earth ores) resources. Its main characteristics are: low rare earth grade, usually TREO0.05~0.3%; complete distribution of rare earth elements, most of which have high content of medium and heavy rare earths; rare earths in ores have unique forms, mainly adsorbed on the surface of clay minerals in the form of ions; radioactive The content of elements is low, and most of them belong to non-radioactive deposits. At present, the ion-adsorbed rare earths in industrially mined ionic rare earth mines account for about 90% of the total rare earth content. [0003] There are three ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/06C22B59/00B03B7/00
CPCY02P10/20
Inventor 刘述平张丽军刘卫刘东邹建华惠博田和明唐湘平李博冀成庆徐凌飞
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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