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Method for leaching scandium, rare earth, rare elements and scattered elements from raw ores

A technology of rare elements and scattered elements, applied in the leaching process, rare earth and rare elements and scattered elements, scandium leaching field, can solve the problems of destroying the ecological balance of the soil, unusable soil, and large environmental pollution, and achieve no pollution to the environment and soil , high leaching rate, and the effect of land fertilization

Pending Publication Date: 2019-01-04
丁帆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mature process for leaching rare earth scandium is to use a strong solution system. Not only is the process complicated and the cost is high, but also the process is very polluting to the environment, destroying the normal ecological balance of the soil, and seriously making the soil unusable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Leach scandium, rare earth, rare elements and scattered elements from coal gangue.

[0021] The leaching process is as follows: (1) first ball mill the gangue to a particle size below 50 mesh;

[0022] (2) The coal gangue that has been ball milled should be piled up according to the design requirements of the heap leaching method; in order to collect the rich liquid and prevent the solution from leaking, before building the pile, the bottom of the pile yard needs to be trimmed and bedding. The materials for building the leaching pad include clay, Sand, gravel, tailings, asphalt, reinforced concrete, plastic film or rubber plastic sheet, etc. Depending on the material, the thickness of the cushion layer is generally 300-600mm. On the cushion layer, block ore is used to pave vertical and horizontal drains, and finally a layer of large ore is laid on the entire floor to protect the bottom cushion. The purpose of heaping is to make the ore heap have good and ...

Embodiment 2

[0028] Embodiment 2: Leach scandium, rare earth and rare elements and scattered elements from bauxite.

[0029] The process steps are as follows: (1) first ball mill the bauxite to a particle size below 50 mesh;

[0030] (2) The ball-milled bauxite is stacked according to the design requirements of the heap leaching method;

[0031] (3) Dissolve the leaching agent nitric acid compound salt and nitrogen fertilizer in water, and the weight ratio of nitric acid compound salt, nitrogen fertilizer and water is 30:10:100 for nitric acid compound salt: nitrogen fertilizer: water, and stir to fully dissolve it to obtain a leaching agent solution The concentration of nitric acid compound salt plus nitrogen fertilizer in the leaching agent solution is 0.30mol / L~0.40mol / L, and the pH value of the leaching agent solution is 5.6. The nitric acid compound salt here is a mixture of potassium nitrate and magnesium nitrate, potassium nitrate Mix with magnesium nitrate in a weight ratio of 20:...

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Abstract

The invention discloses a method for leaching scandium, rare earth, rare elements and scattered elements from raw ores. The method includes the steps: ball-milling the raw ores to reach the particle size of below 50 meshes, and stacking the raw ores according to the requirement of a dump leaching process; dissolving nitrogen fertilizers and nitric acid compound salt serving as a leaching agent inwater, and sufficiently dissolving the nitrogen fertilizers and the nitric acid compound salt by stirring to obtain leaching agent solution; finally, uniformly spraying the leaching agent solution tothe top surface of an ore heap, and leaching scandium, the rare earth, the rare elements and the scattered elements under the condition of natural normal temperature. Leaching rate is high, the process method is simple, low in energy consumption, green, environmentally friendly and low in process cost, environments and soil cannot be polluted or destructed, and land fertility can be increased.

Description

technical field [0001] The invention relates to a leaching process, in particular to a method for leaching scandium, rare earth, rare elements and scattered elements from raw ore, and belongs to the technical field of hydrometallurgy. Background technique [0002] Metal scandium and rare earth elements have many excellent properties, and are irreplaceable strategic resources used in many national defense and high-tech fields. At present, the mature process for leaching rare earth scandium is to use a strong solution system. Not only is the process complicated and the cost is high, but also the process pollutes the environment, destroys the normal ecological balance of the soil, and seriously makes the soil unusable. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for leaching scandium, rare earth, rare elements and scattered elements from raw ore. The method is simple in process and environmentally frien...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B59/00
CPCC22B3/04C22B59/00
Inventor 丁帆
Owner 丁帆
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