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Method of extracting tungsten from high-barium tungsten ore

A technology of barium tungsten and solution, which is applied in the field of tungsten extraction, can solve the problems of inapplicability, and achieve the effect of cheap auxiliary materials and additives, inhibiting tungsten precipitation, and preventing dissolution

Inactive Publication Date: 2015-02-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Also for the acid decomposition method, since BaSO 4 Insoluble in acid, and part of the barite and scheelite components are dispersed, so even the heteropoly acid treatment method mentioned in the patent is not applicable

Method used

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  • Method of extracting tungsten from high-barium tungsten ore
  • Method of extracting tungsten from high-barium tungsten ore
  • Method of extracting tungsten from high-barium tungsten ore

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Take 500g of a certain high-barium tungsten ore (its composition analysis is shown in Table 1), grind it until the particle size is in the range of 74-200μm, and 270gNa 2 CO 3 and 40gSiO 2 After mixing evenly, put it into a corundum crucible and bake it in a muffle furnace at 850°C for 3h. After the calcined sand is cooled and crushed to a particle size of 0.1mm-1mm, it is mixed with 10g / L NaCO 3 solution, the liquid-solid ratio was controlled at 5mL / g, and leached at 60°C for 1h. The obtained sodium tungstate solution extracts tungsten by ion exchange or extraction.

[0026] Table 1 Composition / % of high barium scheelite concentrate

[0027]

[0028] After leaching, analyze the W content in the leaching solution and leaching slag, the leaching solution composition is shown in Table 2, the tungsten leaching rate is 95.96%, and the XRD pattern of leaching slag is as follows figure 1 . Ca, Ba and Si form relatively stable (Ca, Ba) during the roasting process. 2 ...

Embodiment 2

[0032] Take 500g of a certain high-barium tungsten ore (its composition analysis is shown in Table 1), grind it until the particle size is in the range of 74-200μm, and 270gNa 2 CO 3 and 70gSiO 2 After mixing evenly, put it into a corundum crucible and bake it in a muffle furnace at 950°C for 2h. After the calcined sand is cooled and crushed to a particle size of 0.1mm-1mm, it is mixed with 20g / L NaCO 3 solution, the liquid-solid ratio was controlled at 4mL / g, and leached at 60°C for 1h. After leaching, analyze the W content in the leaching liquid and leaching slag, the obtained leaching rate is 96.76%, and the XRD pattern of the leaching slag is as follows: figure 2 . The obtained sodium tungstate solution extracts tungsten by ion exchange or extraction methods.

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Abstract

The invention discloses a method of extracting tungsten from high-barium tungsten ore. The method includes: mixing the high-barium tungsten ore and a certain amount of SiO2 and Na2CO3 to obtain mixture, roasting the mixture at the high temperature, and leaching roasting slag with Na2CO3 to obtain tungsten. By roasting the Na2CO3 and SiO2, the structure of the high-barium tungsten ore is fully broken to obtain stable (Ba or Ca)2SiO4 slag which is leached with high-concentration Na2CO3, water-soluble calcium and barium ions in roasting material are deposited, deposition of tungsten ions is prevented, leaching rate of the tungsten is greatly increased, reaching greater than 95%, and the problem that the high-tension alkaline leaching methods of the prior art fail to break the barite structure, leading to low leaching rate, is solved. The method according to the technical scheme is simple to operate, raw materials are cheap, processing can be performed with traditional equipment, and the method fully satisfies industrial production.

Description

technical field [0001] The invention relates to a method for extracting tungsten from high-barium tungsten ore, which belongs to the technical field of tungsten ore smelting. Background technique [0002] The main smelting raw materials of tungsten are wolframite and scheelite, but with the mining of tungsten resources year by year, their grades decrease, their components are complicated, and they are associated with other metals, etc., which increases the cost of beneficiation and smelting of tungsten resources . [0003] Now the common method for processing wolframite and scheelite is high-pressure alkaline leaching. This process can decompose tungsten ore under high-alkali, high-temperature and high-pressure conditions, and reduce the tungsten content in the slag to below 1-3%. The conditions and equipment required for this process are harsh, and the process cannot destroy the barite structure, so it is not suitable for tungsten ore containing high barium. [0004] Also...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/04C22B34/36
CPCC22B1/02C22B34/36Y02P10/20
Inventor 杨声海王亚雷陈永明何静唐朝波杨建广杨声荣杨信之唐建华
Owner CENT SOUTH UNIV
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