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Method for extracting scandium from Sc-containing amphibole concentrates

A technology of hornblende and concentrate, applied in the field of scandium extraction, can solve the problems of high leaching rate, low leaching rate, and increased extraction cost, and achieve the effect of high extraction rate, high decomposition rate and clean method

Pending Publication Date: 2019-08-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current status of extraction of scandium-containing primary minerals is as follows: when the minerals are not pretreated or leaching aids are not added during the leaching process, the leaching rate is low; and when the leaching rate is high, the minerals need to be pre-treated, increasing extraction cost

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  • Method for extracting scandium from Sc-containing amphibole concentrates

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Sc 2 o 3 The content is 90~96g / t. The scandium concentrate is crushed and ground into powder, and the scandium concentrate is ground until the content of -0.074mm reaches more than 80%, and the scandium concentrate powder is obtained. Mix the scandium concentrate powder with concentrated sulfuric acid, the mass ratio of the scandium concentrate powder to the concentrated sulfuric acid is 1:0.6 to obtain a primary pulp; the primary pulp is matured, the temperature of the curing system is 60°C, and the mature The time is 24 hours, and the aged scandium concentrate is obtained. Mixing the matured scandium concentrate with water, the ratio of the mass of the matured scandium concentrate to the volume of water is 1:50 to obtain a secondary pulp; stirring the secondary pulp at a certain temperature For leaching, the stirring speed is 170 rpm, the temperature of the leaching system is 30° C., and the leaching time is 7 days to obtain a leaching solution. After testing, com...

Embodiment 2

[0033] Sc 2 o 3 The content is 90~96g / t. The scandium concentrate is crushed and ground into powder, and the scandium concentrate is ground until the content of -0.074mm reaches more than 80%, and the scandium concentrate powder is obtained. Mix the scandium concentrate powder with concentrated sulfuric acid, the volume ratio of the scandium concentrate powder to the concentrated sulfuric acid is 1:0.9, and obtain a primary pulp; the primary pulp is matured, the temperature of the curing system is 200°C, and the mature The time is 9 hours, and the aged scandium concentrate is obtained. Mixing the matured scandium concentrate with water, the ratio of the mass of the matured scandium concentrate to the volume of water is 1:20 to obtain a secondary pulp; stirring the secondary pulp at a certain temperature For leaching, the stirring speed is 230 rpm, the temperature of the leaching system is 75° C., and the leaching time is 3 days to obtain a leaching solution. After testing,...

Embodiment 3

[0035] Sc 2 o 3The content is 90~96g / t. The scandium concentrate is crushed and ground into powder, and the scandium concentrate is ground until the content of -0.074mm reaches more than 80%, and the scandium concentrate powder is obtained. Mix the scandium concentrate powder with concentrated sulfuric acid, the volume ratio of the scandium concentrate powder to the concentrated sulfuric acid is 1:0.9, and obtain a primary pulp; the primary pulp is matured, the temperature of the curing system is 200°C, and the mature The time is 12 hours, and the aged scandium concentrate is obtained. Mixing the matured scandium concentrate with water, the ratio of the mass of the matured scandium concentrate to the volume of water is 1:50 to obtain a secondary pulp; stirring the secondary pulp at a certain temperature For leaching, the rotational speed of stirring is 170 rpm, the temperature of the leaching system is 45° C., and the leaching time is 7 days to obtain a leaching solution. ...

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Abstract

The invention relates to a method for extracting scandium from Sc-containing amphibole concentrates. The method comprises the following steps: carrying out ore dressing treatment on Sc-containing amphibole to obtain scandium concentrates; crushing the scandium concentrates, and grinding the scandium concentrates into powder to obtain scandium concentrate powder; mixing the scandium concentrate powder and concentrated sulfuric acid to obtain primary ore pulp; curing the primary ore pulp at certain temperature to obtain cured scandium concentrates; mixing the cured scandium concentrates and water to obtain secondary ore pulp; mixing and leaching the secondary ore pulp at certain temperature to obtain leachate; and filtering the leachate to obtain supernatant and directly extracting scandiumfrom the supernatant. In the process of extracting the scandium, baking treatment does not need to be additionally carried out on rare earth ores, and the extracting of the scandium no longer needs touse mineral acid as a leaching agent in the leaching process, so that the production procedure is simplified, and the production cost is reduced. The method is clean, simple, easy to operate and suitable for large-scale application and popularization.

Description

technical field [0001] The invention relates to the field of hydrometallurgy and mineral processing, in particular to a method for extracting scandium from scandium-containing amphibole concentrate. Background technique [0002] Scandium is a typical rare element, but different from other rare elements in the earth's crust, scandium is a transition metal with soft texture and high boiling point. Scandium resource reserves in the world are relatively abundant, about 2 million tons. Among them, China, the United States, Australia, Kazakhstan, Madagascar, Norway, Russia and Ukraine are countries rich in scandium resources. Scandium is often widely dispersed in minerals such as rare earth ore, bauxite, tin ore, manganese ore, zirconite, zircon, vanadium-titanium magnetite, ilmenite, tungsten ore, uranium ore, and coal. There are more than 800 kinds of scandium minerals. [0003] According to the different processing objects, the scandium extraction process is divided into thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B1/00C22B3/08
CPCC22B1/00C22B3/08C22B59/00Y02P10/20
Inventor 赵红波张艳军
Owner CENT SOUTH UNIV
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