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A method of leaching scandium from scandium-rich material by preheating-step pressure

A material and leaching technology, applied in the field of high-pressure leaching of scandium and hydrometallurgy, can solve the problems of high cost and low leaching rate of scandium, and achieve the effects of less investment in equipment, saving grinding costs, and convenient transportation and storage.

Inactive Publication Date: 2017-11-21
KUNMING SAIYUNSI TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the basis of optimizing the existing technology, the present invention proposes a method for leaching and extracting scandium from scandium-rich materials, which solves the problems of low scandium leaching rate and high cost in the prior art, and is easy to realize industrial production

Method used

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  • A method of leaching scandium from scandium-rich material by preheating-step pressure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Put Sc 2 o 3 The scandium-rich material with a content of 82.6g / t is added to the wet ball mill at a slurry concentration of 55%, and the material that is ball-milled to less than 100 mesh accounts for 96.73%;

[0020] b. Adjust the concentration of the pulp from the grinding to 41.5%, and then inject the pulp into the high-pressure reactor;

[0021] c. Pressurize and inject air into the reaction kettle to make the pressure inside the kettle reach 0.3MPa, and preheat to 90°C;

[0022] d. Add concentrated sulfuric acid 1.1 times the weight of fine ore into the acid tank, inject concentrated sulfuric acid into the reactor at 0.7MPa, and keep the pressure inside the reactor at 0.7MPa;

[0023] e. Keep the temperature in the kettle at 130°C and hold for 4 hours;

[0024] f. Filtrate when the temperature in the kettle drops to 90°C to obtain scandium-containing leaching solution and leaching residue. At this time, the leaching rate is 88.19%.

Embodiment 2

[0026] a. Put Sc 2 o 3 The scandium-rich material with a content of 82.6g / t is added to the wet ball mill at a slurry concentration of 55%, and the material that is ball-milled to less than 100 mesh accounts for 98.22%;

[0027] b. Adjust the concentration of the ore pulp from the grinding to 45.5%, and then inject the ore pulp into the high-pressure reactor;

[0028] c. Pressurize and inject air into the reaction kettle to make the pressure inside the kettle reach 0.3MPa, and preheat to 90°C;

[0029] d. Add concentrated sulfuric acid 1.1 times the weight of fine ore into the acid tank, inject concentrated sulfuric acid into the reactor at 0.8MPa, and keep the pressure inside the reactor at 0.8MPa;

[0030] e. Keep the temperature in the kettle at 130°C and hold for 6 hours;

[0031] f. Filtrate when the temperature in the kettle drops to 90°C to obtain scandium-containing leaching solution and leaching residue. At this time, the leaching rate is 91.72%.

[0032] Table 1 ...

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Abstract

The invention discloses a method for leaching scandium from a scandium-rich material by preheating-multistep pressurization, which comprises the following steps: grinding the scandium-rich material until the particles with less than 100 meshes account for 95% above, adjusting the pulp concentration to 40-46%, injecting into a reaction kettle, preheating to 90 DEG C under the pressure in the kettle of 0.3 MPa, injecting 98% concentrated sulfuric acid which is 1.1 times by weight of the powder into the reaction kettle under the pressure of 0.7-0.8 MPa, keeping the temperature at 120-160 DEG C for 3-6 hours, lowering the temperature in the reaction kettle to 90 DEG C, filtering to obtain a scandium-containing leach solution and leached mud, and using the leach solution as the raw material for further scandium extraction. The technique for leaching scandium from the scandium-rich material has the characteristics of high leaching rate, low energy consumption, low cost and the like. The whole process is simple and easy to implement, and can be widely popularized and applied conveniently.

Description

technical field [0001] The invention relates to a method for high-pressure leaching scandium from scandium-rich materials, which belongs to the category of hydrometallurgy. Background technique [0002] Scandium is a heavy rare earth metal element with very special chemical properties. Scandium is a kind of scattered element. There are very few independent minerals of scandium, and it is very rare in nature. Scandium can be used in new electric light source materials, new aluminum-scandium alloys and special ceramics, and has a wide range of uses. Scandium resources are scarce and difficult to extract, so the price of scandium is relatively high, which greatly limits the application of scandium. Most scandium mainly exists in certain minerals in the form of isomorphism or ion adsorption, for example, vanadium-titanium magnetite, bauxite, zircon, tungsten ore, flashite, etc. At present, there are many studies on extracting scandium from scandium-containing minerals by leach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B59/00
CPCY02P10/20
Inventor 严鹏朱智华张昱
Owner KUNMING SAIYUNSI TRADING CO LTD