CN101608257A - Technology for far infrared thermocompression decomposition of tungsten mineral raw material - Google Patents
Technology for far infrared thermocompression decomposition of tungsten mineral raw material Download PDFInfo
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- CN101608257A CN101608257A CNA2009101114776A CN200910111477A CN101608257A CN 101608257 A CN101608257 A CN 101608257A CN A2009101114776 A CNA2009101114776 A CN A2009101114776A CN 200910111477 A CN200910111477 A CN 200910111477A CN 101608257 A CN101608257 A CN 101608257A
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- tungsten
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The present invention discloses a kind of technology for far infrared thermocompression decomposition of tungsten mineral raw material, and the former slip that tungsten minerals and subsidiary material are formed is placed in airtight and the reactor that band stirs, adopts the far-infrared heating mode to heat up, and former slip is decomposed under hot pressing condition fully.This technology can be handled WO
3Grade is 2%～75% various black tungsten, white tungsten, Scheelite-Wolframite Mixed Mine, tungsten ore, tungsten slurry, and material suitability is very widely arranged, and also has a joint consumption reduction, energy-saving and emission-reduction, production capacity is big and rate of decomposition is high characteristics simultaneously.
Description
Technical field
The invention belongs to the technical field of tungsten hydrometallurgy, relate in particular to the Technology of a kind of tungsten hydrometallurgy cleaner production, refer in particular to technology for far infrared thermocompression decomposition of tungsten mineral raw material.
Background technology
In the wet smelting process of conventional tungsten, what the decomposition of tungsten mineral material was adopted is steam heating or the heating of alternating current coil power frequency.
Because the limitation of type of heating, the temperature that material is heated is difficult to rise to the temperature more than 150 ℃, owing to do not reach theoretical temperature of reaction flex point, adopts the producer of these type of heating can't further grope best tungsten material decomposition technique parameter again.Even known these processing parameters, also owing to the defective of equipment can't be used from various channels.Therefore, contain in the residue after the tungsten material decomposes and to wash WO
3Surpass 3%.
Aforesaid method need be with more surplus alkali, cost height not only, and the extraction yield of tungsten material is low, when surplus alkali enters waste water simultaneously, there is more acid to neutralize, forms metal-salt and enter water body, this just needs more pollution abatement costs, has also brought new metal-salt to pollute.
Chinese patent discloses the treatment process that a kind of thermokalite ball milling decomposes the tungsten material, and its thinking is the process adding chemical additive by mechanical activation, and with superheated steam thermal degradation ore, reaches higher tungsten material rate of decomposition.
Aforesaid method needs special equipment, and the loss height of equipment, and maintenance cost is big; The steam direct heating is in the tungsten material of grinding process, and operating process is dangerous big, has the producer of use that explosion hazard took place; Poor for applicability to material, this method mainly is applicable to high silicon sheelite, for other material, has more advantage as powdered white tungsten fine ore etc. unlike traditional decomposition method.
In view of this, the inventor studies at the decomposition technique and the equipment of tungsten mineral material, has developed finally that technology is simple, cost is low, metal recovery rate is high, the decomposition technique of energy-conserving and environment-protective and suitable device, and this case produces thus.
Summary of the invention
The purpose of this invention is to provide a kind of technology for far infrared thermocompression decomposition of tungsten mineral raw material,, realize the process for cleanly preparing that tungsten mineral material fully decomposes in the tungsten hydrometallurgy to optimize technological process, a joint consumption reduction, energy-saving and emission-reduction.
To achieve these goals, technical scheme of the present invention is:
Technology for far infrared thermocompression decomposition of tungsten mineral raw material, the former slip that tungsten minerals and subsidiary material are formed are placed in airtight and the reactor that band stirs, adopt the far-infrared heating mode to heat up, and former slip is decomposed under hot pressing condition fully.
Described reactor is a pressurized vessel.It is when the temperature of charge that will heat has surpassed the boiling point of material that hot pressing is decomposed, and only could continue to heat up at the band pressure condition, so equipment requirements is airtight pressure vessel, must be made by the producer with professional qualification.
The described heating-up time is 2～5 hours, and the control outlet temperature is at 170～210 ℃.When reaching higher decomposition reaction velocity, different tungsten materials is different at the heat of the required absorption of decomposition course.For some labile tungsten material, do not need to be provided with too high outlet temperature.Can reduce energy consumption to the end reaction temperature controlling.Equipment adopts the outlet temperature automatic control mode for this reason, can satisfy various control conditions quickly and easily.Conventional, handle the especially ore of wolframic acid manganese form of wolframite, temperature need reach more than 195 ℃; Handle the white tungsten fine ore of flotation, temperature only need reach 170 ℃ and get final product; Handle the assorted ore deposit of the mixing of reclaiming, even contain WO
3Grade is identical, still will be according to different kind adjusting processes, if assorted ore deposit is mixed with yellow tungsten, Tungsten oxide 99.999 after a large amount of smelteries handles, as long as 100 ℃ just can guarantee ore resolution ratio, if be mixed with a large amount of tungsten powders or tungsten sposh, then decomposition temperature reaches 200 ℃ of ability assurance ore resolution ratios.
Described tungsten minerals is WO
3Grade is 2%～75% various black tungsten, white tungsten, Scheelite-Wolframite Mixed Mine, tungsten ore, tungsten slurry.Difference control heating-up time and terminal temperature according to raw material type make tungsten mineral material and various additive finish decomposition reaction, and this technology has the advantages that production capacity is big, rate of decomposition is high, and this technology has the heating efficiency height simultaneously, the advantage that the subsidiary material consumption is few.
Described subsidiary material are meant caustic alkali (liquid caustic soda, solid caustic soda), phosphoric acid or phosphoric acid salt, nitre, and the sodium tungstate solution that obtains after the decomposition reaction directly enters the next procedure of tungsten hydrometallurgy main flow.For different tungsten materials, as WO
3Grade is 2% tungsten slurry and WO
3Grade is 75% tungsten concentrate, and the difference of the proportion of material, foreign matter content, chemical reaction enthalpy has determined kind, the quantity of the subsidiary material that will add to exist huge difference certainly.Concentrate can be by the Theoretical Calculation subsidiary material dosage, then to analyze when low grade ore uses ore deposit point, material type, the impurity that may exist.As WO
3Grade is 20% assorted ore deposit, because the cost and the limitation of analysis aspect, what there is no telling was other 80% is that what material is formed, and wherein which partly can promote chemical reaction, and which has partly can consume the subsidiary material of interpolation again; More can't guarantee same WO
3Grade is that this a collection of impurity of ore of 20% is identical with the next batch impurity composition.Advanced heating installation has been arranged, also will find only subsidiary material addition, reached purpose of energy saving according to the characteristics of different material corrected parameter in use.
Contain in the residue of described decomposition back and can not wash WO
3＜1%.
After adopting such scheme, far-infrared heating mode of the present invention heats up and has the high advantage of heating efficiency, refers to that also far type of heating is to utilize thermal radiation that material is heated.This type of heating also produces vibration to levigated tungsten material except the transmission of energy, strengthen thin material of tungsten material internal stress, has promoted the decomposition of tungsten material.
Advantage of the present invention is the characteristic that makes full use of material in the technological process, has optimized technological process, and tungsten contained material is fully decomposed, and technical process is short, has both improved the WO that ore decomposes
3The rate of recovery has reduced the consumption of subsidiary material again, has reduced simultaneously the discharging of alkali and the secondary pollution that the waste water end treatment brings in the waste water in the wet smelting process afterwards, realizes process for cleanly preparing.
Embodiment
Technology for far infrared thermocompression decomposition of tungsten mineral raw material of the present invention and equipment are the improvement to the conventional tungsten wet method smelting process.In the conventional tungsten wet method smelting process, tungsten ore is steam heating or power current heating through the type of heating that alkali decomposes the coarse sodium tungstate that obtains.Because the limitation of type of heating, temperature is difficult to reach more than 160 ℃, therefore, has many tungsten mineral materials to handle, and more can't grope the optimum handling technology of these materials.
Improvement of the present invention is: break through on equipment, make temperature of reaction enough high with new type of heating, can reach the requirement that with less subsidiary material tungsten mineral material is fully decomposed in the short time.In this way, the processing power of single devices is bigger more than 5 times than conventional reactor.
Example 1 wolframite slip 6m
3(in 2.5 tons of ores are arranged, WO
3Grade 69.48%, solution NaOH concentration 130g/l, Na
3PO
4Concentration 13.8g/l) decompose with the far infrared thermocompression method, 193 ℃ of end reaction controlled temperature, stirring reaction are after 2 hours, and solution NaOH concentration is WO behind 19.2g/l, the slag filtration washing
3Content is 0.82%, and slag weight is about 1 ton.
The assorted mineral aggregate slurry of example 2 white tungsten 6m
3(in 2.5 tons of ores are arranged, WO
3Grade 15.48%, Ca content 25%, solution NaOH concentration 50g/l, Na
3PO
4Concentration 38g/l) decompose with the far infrared thermocompression method, 170 ℃ of end reaction controlled temperature, stirring reaction are after 2 hours, and solution NaOH concentration is WO behind 25.2g/l, the slag filtration washing
3Content is 0.45%, and slag weight is about 2 tons.
Claims (6)
1, technology for far infrared thermocompression decomposition of tungsten mineral raw material is characterized in that: the former slip that tungsten minerals and subsidiary material are formed is placed in airtight and the reactor that band stirs, adopts the far-infrared heating mode to heat up, and former slip is decomposed under hot pressing condition fully.
2, technology for far infrared thermocompression decomposition of tungsten mineral raw material according to claim 1 is characterized in that: reactor is a pressurized vessel.
3, technology for far infrared thermocompression decomposition of tungsten mineral raw material according to claim 1 is characterized in that: the heating-up time is 2～5 hours, and the control outlet temperature is at 170～210 ℃.
4, technology for far infrared thermocompression decomposition of tungsten mineral raw material according to claim 1 is characterized in that: tungsten minerals is WO
3Grade is 2%～75% various black tungsten, white tungsten, Scheelite-Wolframite Mixed Mine, tungsten ore or tungsten slurry.
5, technology for far infrared thermocompression decomposition of tungsten mineral raw material according to claim 1, it is characterized in that: subsidiary material are meant caustic alkali, phosphoric acid or phosphoric acid salt, nitre, and the sodium tungstate solution that obtains after the decomposition reaction directly enters the next procedure of tungsten hydrometallurgy main flow.
6, technology for far infrared thermocompression decomposition of tungsten mineral raw material according to claim 1 is characterized in that: decompose to contain in the residue of back and can not wash WO
3＜1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101114776A CN101608257A (en) | 2009-04-09 | 2009-04-09 | Technology for far infrared thermocompression decomposition of tungsten mineral raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101114776A CN101608257A (en) | 2009-04-09 | 2009-04-09 | Technology for far infrared thermocompression decomposition of tungsten mineral raw material |
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| CN101608257A true CN101608257A (en) | 2009-12-23 |
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|---|---|---|---|
| CNA2009101114776A Pending CN101608257A (en) | 2009-04-09 | 2009-04-09 | Technology for far infrared thermocompression decomposition of tungsten mineral raw material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451434A (en) * | 2013-08-29 | 2013-12-18 | 湖南辰州矿业股份有限公司 | Treatment method for dephosphorized slag in tungsten metallurgy |
| CN108642308A (en) * | 2018-04-13 | 2018-10-12 | 中南大学 | A kind of method that high tin tungsten ore is decomposed in mixture of sulfuric phosphoric acid pressurization |
| CN108642307A (en) * | 2018-04-13 | 2018-10-12 | 中南大学 | A kind of method that wolframite or Scheelite-Wolframite Mixed Mine extraction tungsten are decomposed in hydrochloric acid-phosphoric acid pressurization |
| CN108642278A (en) * | 2018-04-13 | 2018-10-12 | 中南大学 | A kind of method that mixture of sulfuric phosphoric acid pressurization decomposes wolframite or Scheelite-Wolframite Mixed Mine to extract tungsten |
| CN108707765A (en) * | 2018-04-13 | 2018-10-26 | 中南大学 | A kind of method that scheelite is decomposed in the pressurization of phosphorus sulphur nitration mixture |
| CN109437308A (en) * | 2018-12-30 | 2019-03-08 | 江西五矿高安有色金属有限公司 | The method for preparing ammonium paratungstate using low grade white tungsten concentrate |
-
2009
- 2009-04-09 CN CNA2009101114776A patent/CN101608257A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451434A (en) * | 2013-08-29 | 2013-12-18 | 湖南辰州矿业股份有限公司 | Treatment method for dephosphorized slag in tungsten metallurgy |
| CN108642308A (en) * | 2018-04-13 | 2018-10-12 | 中南大学 | A kind of method that high tin tungsten ore is decomposed in mixture of sulfuric phosphoric acid pressurization |
| CN108642307A (en) * | 2018-04-13 | 2018-10-12 | 中南大学 | A kind of method that wolframite or Scheelite-Wolframite Mixed Mine extraction tungsten are decomposed in hydrochloric acid-phosphoric acid pressurization |
| CN108642278A (en) * | 2018-04-13 | 2018-10-12 | 中南大学 | A kind of method that mixture of sulfuric phosphoric acid pressurization decomposes wolframite or Scheelite-Wolframite Mixed Mine to extract tungsten |
| CN108707765A (en) * | 2018-04-13 | 2018-10-26 | 中南大学 | A kind of method that scheelite is decomposed in the pressurization of phosphorus sulphur nitration mixture |
| CN108642308B (en) * | 2018-04-13 | 2020-11-10 | 中南大学 | Method for decomposing high-tin tungsten ore under pressure by using sulfur-phosphorus mixed acid |
| CN109437308A (en) * | 2018-12-30 | 2019-03-08 | 江西五矿高安有色金属有限公司 | The method for preparing ammonium paratungstate using low grade white tungsten concentrate |
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Open date: 20091223 |