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Method for leaching gallium from vanadium extraction tailings

A vanadium extraction tailings and leaching technology, which is applied in the field of gallium leaching from vanadium extraction tailings, can solve the problems of environmental pollution, resource waste, immature gallium utilization technology in vanadium extraction tailings, etc., and achieve high leaching rate and low cost Effect

Pending Publication Date: 2021-07-09
PANZHIHUA UNIV
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  • Claims
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Problems solved by technology

There are few studies on the leaching process of gallium in the vanadium extraction tailings of vanadium-titanium magnetite, and the utilization technology of gallium in the vanadium extraction tailings is immature. The smelting reduction method is the main method, but most of these methods have the disadvantages of low extraction efficiency, waste of resources or environmental pollution.

Method used

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  • Method for leaching gallium from vanadium extraction tailings

Examples

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Effect test

Embodiment 1

[0040] Combine 100% vanadium extraction tailings with 24% Na 2 CO 3 , 40% CaO, 8% NaOH, 30% water and stir evenly. After mixing, use drying equipment to dry at 100°C for 4.5 hours and grind to less than 0.8mm. Put the gallium-containing tailings after grinding in SX2- 10-13 Calcined in a resistance furnace for 1.5h, and controlled the calcination temperature at 950°C with a resistance furnace temperature controller. After the roasting is completed, the furnace is cooled to about 85°C to take out the gallium-containing waste residue, smash and grind it to a size below 0.2mm, and the alkali leaching time is 1.5h, and the pressure of alkali leaching is 0.8MPa. The alkali-soluble residue and 150g / L NaOH are mixed and stirred at a liquid-solid ratio of 1ml: 5.5g. The stirring speed is 270r / min, and the temperature is controlled at 85°C by an electronic constant temperature water bath for stirring and leaching. The gallium leaching rate is 98.52%.

Embodiment 2

[0042] Similar to Example 1, the difference is that Na 2 CO 3 :CaO:NaOH: Vanadium extraction tailings=0.15:0.4:0.1:0.8. Gallium leaching rate is 99.15%.

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Abstract

The invention relates to a method for leaching gallium from vanadium extraction tailings, and belongs to the technical field of gallium extraction from the vanadium extraction tailings. The method for leaching the gallium from the vanadium extraction tailings comprises the steps that the vanadium extraction tailings and an alkali solvent are evenly mixed and then dried for 4.5-5 hours at the temperature of 100-120 DEG C, then the mixture is ground to be smaller than 1 mm, gallium-containing residues are obtained after air cooling, the alkali solvent is Na2CO3, NaOH and CaO, and the mass ratio of Na2CO3 to CaO to NaOH to the vanadium extraction tailings is (0.15-0.24): (0.4-0.45): (0.08-0.1): (0.8-1); the obtained gallium-containing residues are roasted at 950-1100 DEG C for 1.3-1.5 hours, a furnace is cooled, and the gallium-containing residues are ground to be 0.5 mm or below; and the roasted gallium-containing residues are mixed with a NaOH solution, and stirring alkaline leaching is performed for 1.2-1.5 h. The method for leaching the gallium from the vanadium extraction tailings is clean, environmentally friendly and high in leaching rate.

Description

technical field [0001] The invention relates to a method for leaching gallium from vanadium extraction tailings, and belongs to the technical field of gallium extraction from vanadium extraction tailings. Background technique [0002] Gallium is one of the metal varieties with resource advantages in my country. Metal gallium is the main raw material for preparing gallium nitride and gallium arsenide single crystal semiconductor materials. With the stable development of domestic and foreign LED and traditional radio frequency communications, as well as the accelerated development of emerging industries such as VCSEL optoelectronic chips and 5G base station construction, the demand for core materials such as gallium arsenide and gallium nitride will continue to increase. [0003] The vanadium-titanium magnetite in Panzhihua City, Sichuan Province is listed as an important resource in western my country, of which gallium reserves are about 92,400 tons, accounting for more than...

Claims

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Application Information

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IPC IPC(8): C22B58/00C22B7/00C22B1/02
CPCC22B58/00C22B7/008C22B1/02Y02P10/20
Inventor 付雨馨张士举徐玲俐邓玉芳唐艺珂
Owner PANZHIHUA UNIV
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