CN105112691A - Method for extracting tungsten from tungsten minerals through alkaline decomposition - Google Patents
Method for extracting tungsten from tungsten minerals through alkaline decomposition Download PDFInfo
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- CN105112691A CN105112691A CN201510651810.8A CN201510651810A CN105112691A CN 105112691 A CN105112691 A CN 105112691A CN 201510651810 A CN201510651810 A CN 201510651810A CN 105112691 A CN105112691 A CN 105112691A
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Abstract
The invention particularly relates to a method for extracting tungsten from tungsten minerals through alkaline decomposition. The method comprises steps as follows: Step 1, the tungsten minerals are ground to the particle size smaller than 200 meshes; Step 2, the ground tungsten minerals are evenly mixed with solid NaOH; Step 3, a mixture obtained in Step 2 is placed in a high-temperature furnace for roasting; Step 4, a roasted material obtained in Step 3 is subjected to water leaching and a sodium tungstate solution is obtained. With the adoption of the method for extracting the tungsten from the tungsten minerals through alkaline decomposition, reactions can be performed in a normal pressure environment, compared with existing alkaline decomposition technologies, the method has the advantages that autoclave equipment is reduced, operation is more convenient and safer, and meanwhile, the energy consumption and the production cost are reduced under the condition that the alkaline consumption is equivalent; in addition, the technology can be used for treating wolframite and scheelite mixed minerals, scheelite, artificial scheelite and tungsten slag as well as wolframite and is wide in application range; besides, for treatment of all kinds of tungsten-containing mineral aggregate, the decomposition rate is high, and the content of insoluble WO3 in waste slag is extremely low.
Description
Technical field
The present invention relates to mineral manufacture field, particularly relate to a kind of method extracting tungsten from tungsten minerals.
Background technology
Tungsten ore in early days extracts field, and sodium hydroxide is only used for decomposing wolframite, is not applied to sheelite and decomposes.But Chinese patent CN85100350 proposed the hot ball milled decompose tunstite of alkali in 1985, revolutionizing sodium hydroxide can not the view of decompose tunstite, but this method device dependence is high, serious wear, and safety problem is given prominence to.Chinese patent CN1307140A proposes can decompose various tungsten ore equally with sodium hydroxide in autoclave subsequently, but in order to ensure leaching effect, need keep larger liquid-solid ratio, therefore needs larger alkali consumption.
In above-mentioned patented technology, the extraction of tungsten ore needs autoclave, and energy consumption is comparatively large, and production cost is higher, and thorough not to the decomposition of sheelite, and rate of decomposition is low, and loss is serious.Therefore, market is badly in need of a kind of energy consumption low, rate of decomposition is high, to reduce the technique extracting tungsten from tungsten minerals of production cost comprehensively.
Summary of the invention
The object of the present invention is to provide a kind of use range wide, energy consumption is low, and rate of decomposition is high, and the caustic digestion tungsten minerals of low production cost puies forward the method for tungsten.
For achieving the above object, the invention provides a kind of method that caustic digestion tungsten minerals carries tungsten, comprise the steps:
Step one, is ground to tungsten minerals granularity and is less than 200 orders;
Step 2, mixes the tungsten minerals after grinding with solid NaOH;
Step 3, mixture step 2 obtained is placed in high temperature kiln roasting;
Step 4, the calcining matter obtained step 3 carries out water logging and obtains sodium tungstate solution.
Wherein, described tungsten minerals is for containing WO
3the sheelite of 15 ~ 78%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
Wherein, described tungsten minerals is for containing WO
3be the Scheelite-Wolframite Mixed Mine of 30 ~ 75%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
Wherein, described tungsten minerals is for containing WO
3be the wolframite of 15 ~ 75%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
Wherein, described tungsten minerals is for containing WO
3be the tungsten slag of 2 ~ 10%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
Wherein, described tungsten minerals is artificial scheelite, with CaWO in described artificial scheelite
4the WO that form exists
3account for total WO
30.5 ~ 99%; NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
Wherein, in described step 3, maturing temperature controls at 500 ~ 900 DEG C, and roasting time controlled at 0.5 ~ 4.0 hour.
Wherein, in described step 4, the liquid-solid ratio of leaching is 2:1 ~ 6:1; Extraction temperature controls in room temperature to 95 DEG C, and extraction time controlled at 0.5 ~ 4.0 hour.
The invention has the beneficial effects as follows: caustic digestion tungsten minerals provided by the invention puies forward the method for tungsten, realize decomposing by adopting NaOH solid and tungsten minerals to react, can react under atmospheric pressure environment, compared with existing alkali decomposition process, decrease autoclave equipment, handle more convenient, safety, simultaneously when alkali consumption is suitable, reduce energy consumption and production cost; And this technique can not only process wolframite, Scheelite-Wolframite Mixed Mine, sheelite, artificial scheelite and tungsten slag can also be processed, applied widely; In addition, to the process of various tungstenic mineral aggregate, rate of decomposition is high, the insoluble WO in waste residue
3content is extremely low.
Accompanying drawing explanation
Fig. 1 is the process flow sheet that caustic digestion tungsten minerals provided by the invention puies forward the method for tungsten.
Embodiment
In order to more clearly state the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Consult Fig. 1, caustic digestion tungsten minerals provided by the invention puies forward the method for tungsten, change the technique with NaOH solution decomposition of tungsten mineral in prior art, use NaOH solid decomposition tungsten minerals instead, alkali concn is brought up to ultimate attainment i.e. solid alkali, the decomposition of having reacted tungsten minerals can be carried out under lesser temps and atmospheric pressure environment.
Specifically, comprise the steps:
Step one, is ground to tungsten minerals granularity and is less than 200 orders;
Step 2, mixes the tungsten minerals after grinding with solid NaOH;
Step 3, mixture step 2 obtained is placed in high temperature kiln roasting; Maturing temperature controls at 500 ~ 900 DEG C, and roasting time controls at 0.5 ~ 4.0 hour;
Step 4, the calcining matter obtained step 3 carries out water logging and obtains sodium tungstate solution, and wherein, the liquid-solid ratio of leaching is 2:1 ~ 6:1; Extraction temperature controls in room temperature to 95 DEG C, and extraction time controlled at 0.5 ~ 4.0 hour.
Caustic digestion tungsten minerals provided by the invention puies forward the method for tungsten, can process sheelite, Scheelite-Wolframite Mixed Mine, wolframite, tungsten slag and artificial scheelite.
Be below embodiment more specifically:
Embodiment 1: certain white tungsten fine ore is containing 63.20%WO
3, granularity is-250 orders.The heavy 100g in ore deposit, 2.4 times of theoretical NaOH consumptions, 700 DEG C of roastings 0.5 hour, product of roasting adds water agitation leach, and liquid-solid ratio 6:1, temperature 80 DEG C, insulation 2h, filters, and washing is dried, containing insoluble WO in slag
3be 0.252%, rate of decomposition reaches 99.84%.
Embodiment 2: containing 45.32%WO in certain sheelite
3, granularity is-250 orders.The heavy 80g in ore deposit, 3.0 times of theoretical NaOH consumptions, 850 DEG C of roastings 4 hours, product of roasting adds water agitation leach, and liquid-solid ratio 4:1, temperature 50 C, insulation 4h, filters, and washing is dried, containing insoluble WO in slag
3be 0.210%, rate of decomposition reaches 99.88%.
Embodiment 3: Scheelite-Wolframite Mixed Mine is containing 51.46%WO
3(wherein sheelite and wolframite respectively account for 1/2 substantially).Granularity is-250 orders.Get above-mentioned ore deposit 150g, 1.7 times of theoretical NaOH consumptions, 550 DEG C of roastings 2 hours, product of roasting adds water agitation leach, and liquid-solid ratio 5:1, temperature is room temperature, stirs 3h, filters, and washing is dried, containing insoluble WO in slag
3be 6.52%, rate of decomposition reaches 94.92%.
Embodiment 4: certain tungsten slag chats is containing 5.46%WO
3, granularity is-300 orders.The heavy 200g in ore deposit, 3 times of theoretical NaOH consumptions, 620 DEG C of roastings 3 hours, product of roasting adds water agitation leach, and liquid-solid ratio 2:1, temperature 70 C, insulation 2h, filters, and washing is dried, containing insoluble WO in slag
3be 0.14%, rate of decomposition reaches 98.84%.
Can draw from above-mentioned testing data, caustic digestion tungsten minerals provided by the invention puies forward the method for tungsten, can be applicable to the process of various tungstenic mineral aggregate, at least can process wolframite, Scheelite-Wolframite Mixed Mine, sheelite, artificial scheelite and tungsten slag; And rate of decomposition is high, the insoluble WO in waste residue
3content is extremely low.In addition, compared with existing alkali decomposition process, decrease autoclave equipment, handle more convenient, safety, energy consumption is lower simultaneously, reduces production cost.
These are only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. caustic digestion tungsten minerals puies forward a method for tungsten, it is characterized in that, comprises the steps:
Step one, is ground to tungsten minerals granularity and is less than 200 orders;
Step 2, mixes the tungsten minerals after grinding with solid NaOH;
Step 3, mixture step 2 obtained is placed in high temperature kiln roasting;
Step 4, the calcining matter obtained step 3 carries out water logging and obtains sodium tungstate solution.
2. caustic digestion tungsten minerals according to claim 1 puies forward the method for tungsten, it is characterized in that, described tungsten minerals is for containing WO
3the sheelite of 15 ~ 78%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
3. a kind of caustic digestion tungsten minerals according to claim 1 puies forward the method for tungsten, it is characterized in that, described tungsten minerals is for containing WO
3be the Scheelite-Wolframite Mixed Mine of 30 ~ 75%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
4. caustic digestion tungsten minerals according to claim 1 puies forward the method for tungsten, it is characterized in that, described tungsten minerals is for containing WO
3be the wolframite of 15 ~ 75%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
5. caustic digestion tungsten minerals according to claim 1 puies forward the method for tungsten, it is characterized in that, described tungsten minerals is for containing WO
3be the tungsten slag of 2 ~ 10%, NaOH consumption is 1.0 ~ 3.0 times of theoretical amount.
6. caustic digestion tungsten minerals according to claim 1 puies forward the method for tungsten, it is characterized in that, described tungsten minerals is artificial scheelite, with CaWO in described artificial scheelite
4the WO that form exists
3account for total WO
30.5 ~ 99%, NaOH consumption be 1.0 ~ 3.0 times of theoretical amount.
7. the caustic digestion tungsten minerals according to any one of claim 1-6 puies forward the method for tungsten, it is characterized in that, in described step 3, maturing temperature controls at 500 ~ 900 DEG C, and roasting time controlled at 0.5 ~ 4.0 hour.
8. the caustic digestion tungsten minerals according to any one of claim 1-6 puies forward the method for tungsten, it is characterized in that, in described step 4, the liquid-solid ratio of leaching is 2:1 ~ 6:1; Extraction temperature controls in room temperature to 95 DEG C, and extraction time controlled at 0.5 ~ 4.0 hour.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907993A (en) * | 2016-07-05 | 2016-08-31 | 江西理工大学 | Method for extracting tungsten from fluorine-containing scheelite |
| CN106011504A (en) * | 2016-07-05 | 2016-10-12 | 江西理工大学 | Method for resolving scheelite |
| CN106868321A (en) * | 2017-03-21 | 2017-06-20 | 赣州海创钨业有限公司 | It is a kind of to process the method that scheelite extracts tungsten |
| CN108754123A (en) * | 2018-06-22 | 2018-11-06 | 中南大学 | A method of processing scheelite |
| CN110042232A (en) * | 2019-04-30 | 2019-07-23 | 江西理工大学 | A kind of scheelite distintegrant and its method that tungsten is extracted from scheelite |
| CN110468290A (en) * | 2019-08-06 | 2019-11-19 | 湖南懋天世纪新材料有限公司 | Sodium Polyacrylate is handling application and method in useless tungsten material |
| CN113061754A (en) * | 2021-02-19 | 2021-07-02 | 江钨世泰科钨品有限公司 | Decomposition process of flotation type tungsten raw material |
| CN113234921A (en) * | 2021-05-10 | 2021-08-10 | 贵州轻工职业技术学院 | Method for extracting tungsten and fluorine from fluorine-containing tungsten ore and application |
| CN113582233A (en) * | 2021-08-30 | 2021-11-02 | 中南大学 | Method for extracting tungsten and application thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907993A (en) * | 2016-07-05 | 2016-08-31 | 江西理工大学 | Method for extracting tungsten from fluorine-containing scheelite |
| CN106011504A (en) * | 2016-07-05 | 2016-10-12 | 江西理工大学 | Method for resolving scheelite |
| CN105907993B (en) * | 2016-07-05 | 2018-01-02 | 江西理工大学 | A kind of method that tungsten is extracted from fluorine-containing scheelite |
| CN106868321A (en) * | 2017-03-21 | 2017-06-20 | 赣州海创钨业有限公司 | It is a kind of to process the method that scheelite extracts tungsten |
| CN106868321B (en) * | 2017-03-21 | 2018-11-02 | 赣州海创钨业有限公司 | A method of processing scheelite extracts tungsten |
| CN108754123A (en) * | 2018-06-22 | 2018-11-06 | 中南大学 | A method of processing scheelite |
| CN110042232A (en) * | 2019-04-30 | 2019-07-23 | 江西理工大学 | A kind of scheelite distintegrant and its method that tungsten is extracted from scheelite |
| CN110042232B (en) * | 2019-04-30 | 2021-01-15 | 江西理工大学 | Scheelite decomposer and method for extracting tungsten from scheelite |
| CN110468290A (en) * | 2019-08-06 | 2019-11-19 | 湖南懋天世纪新材料有限公司 | Sodium Polyacrylate is handling application and method in useless tungsten material |
| CN110468290B (en) * | 2019-08-06 | 2021-10-22 | 湖南懋天世纪新材料有限公司 | Application and method of sodium polyacrylate in treatment of waste tungsten material |
| CN113061754A (en) * | 2021-02-19 | 2021-07-02 | 江钨世泰科钨品有限公司 | Decomposition process of flotation type tungsten raw material |
| CN113234921A (en) * | 2021-05-10 | 2021-08-10 | 贵州轻工职业技术学院 | Method for extracting tungsten and fluorine from fluorine-containing tungsten ore and application |
| CN113582233A (en) * | 2021-08-30 | 2021-11-02 | 中南大学 | Method for extracting tungsten and application thereof |
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Inventor after: Liang Yong Inventor after: Zhao Lifu Inventor after: Liu Yuanxin Inventor after: Xu Guozuan Inventor after: Liu Yucheng Inventor after: Li Yongkang Inventor after: Liang Xin Inventor before: Liang Yong |
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