CN109022763A - A kind of processing method and its equipment of tungsten waste - Google Patents
A kind of processing method and its equipment of tungsten waste Download PDFInfo
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- CN109022763A CN109022763A CN201810941873.0A CN201810941873A CN109022763A CN 109022763 A CN109022763 A CN 109022763A CN 201810941873 A CN201810941873 A CN 201810941873A CN 109022763 A CN109022763 A CN 109022763A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/36—Obtaining tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of processing method of tungsten waste and its equipment, which comprises is granulated tungsten waste, obtains graininess tungsten waste；The graininess tungsten waste roasting that step 1 is obtained, obtains roasting material；Additive is added in roasting material obtained in step 2 while hot, obtains melt after reacting using the residual temperature after roasting；The melt that step 3 is obtained carries out water logging, obtains solution and solid.The equipment includes Granulation Equipments, roasting apparatus, dust collection device, water logging slot, dnockout pumps, solid-liquid separating equipment, concentrator, drying equipment, packaging facilities.Tungsten waste processing method process of the present invention is short, the rate of recovery is high, is not particularly limited to the content of impurity element in tungsten waste, and adaptability to raw material is good, is a kind of environmentally protective processing method.
Description
Technical field
The present invention relates to tungsten waste resource recycling technology, the processing method of especially a kind of tungsten waste and its set
It is standby.
Background technique
Tungsten is important strategic resource, is known as " industrial tooth ".With the increasingly exploitation of tungsten ore, tungsten ore resource reserves day
Benefit reduction, tungsten secondary resource recycling are particularly important.However due to tungsten waste material complicated component multiplicity, processing difficulty is big.Industry
Upper common recovering means have " metal cobalt ", " zinc melts method ", " oxidizing roasting alkaline leaching ".
Metal cobalt at high temperature aoxidizes the tungsten in tungsten waste material and reacts raw mainly using nitre as oxidant
Sodium tungstate is produced, sodium tungstate frit water logging rear impurity element is oxidized to corresponding high oxide not soluble in water, to realize
The separation of impurity element and tungsten, however industrial flow is long, high production cost, the gas of discharge can cause environmental pollution.
Zinc melts method and is only suitable for handling the hard alloy that cobalt content is lower than 10%, and Zn content remaining in mixture is high, makes
The performance of secondary alloy is weakened than original alloy property, and power consumption is high, and zinc fume reclaimer requires height, and zinc volatilization pollution is big.
Traditional oxidizing roasting alkaline leaching is by tungsten waste material through high temperature oxidation roasting, and clinker adds alkali to leach after roasting, however
Slag tungstenic is high, and the rate of recovery is low, and secondary Slag treatment is at high cost, and processing difficulty is big.
Summary of the invention
The purpose of the invention is to overcome, there are air pollution, raw material are restricted in existing tungsten waste disposal technology
By force, the problem of rate of recovery is low, long flow path, provides the processing method and its equipment of a kind of tungsten waste.
Concrete scheme is as follows:
A kind of processing method of tungsten waste, comprising the following steps:
Step 1: tungsten waste being granulated, graininess tungsten waste is obtained；
Step 2: the graininess tungsten waste that step 1 is obtained roasts, and obtains roasting material；
Step 3: additive is added in roasting material obtained in step 2 while hot, after being reacted using the residual temperature after roasting
To melt；
Step 4: the melt that step 3 is obtained carries out water logging, obtains solution and solid.
Further, in tungsten waste described in step 1 tungsten mass content be 40%~95%, cobalt mass content be 0~
20%.
Optional, granularity 0.1cm~10cm of graininess tungsten waste described in step 1, preferably 1cm~3cm.
Further, the temperature of roasting described in step 2 be 500~850 DEG C, preferably 550-800 DEG C, the roasting when
Between be 2~4h.
Further, in step 3 additive be sodium carbonate, sodium hydroxide and SODIUM PERCARBONATE, solution described in step 4 be containing
There is the solution of sodium tungstate.
Further, the quality of tungsten waste described in step 1: the quality of sodium carbonate described in step 3, the hydroxide
Quality=100:(5~10 of the quality of sodium, the SODIUM PERCARBONATE): (20~50): (5~20), preferably 100:(6~8): (30
~40): (10~15).
Further, the time that additive described in step 3 is reacted with the roasting material is 1~4h, preferably 2~3h.
Further, the time of water logging described in step 4 is 0.5~2h.
Further, the solution containing sodium tungstate is obtained into sodium tungstate product by evaporative crystallization, or wolframic acid will be contained
The solution of sodium obtains ammonium tungstate solution through extraction or ion exchange, and ammonium tungstate solution obtains APT product by evaporative crystallization.
The product that the present invention also protects the processing method of the tungsten waste to handle, including containing the molten of sodium tungstate
At least one of liquid, sodium tungstate product, APT product.
The equipment that the present invention also protects the processing method with the tungsten waste, comprising: Granulation Equipments, roasting are set
Standby, dust collection device, water logging slot, dnockout pumps, solid-liquid separating equipment, concentrator, drying equipment, packaging facilities,
Wherein, the Granulation Equipments is connected to the roasting apparatus, and the dust collection device is separately connected the Granulation Equipments
With the roasting apparatus, the roasting apparatus connects the water logging slot, and the water logging slot is connected described solid by the dnockout pumps
Liquid separation equipment, the solid-liquid separating equipment connect the concentrator, and the concentrator connects the drying equipment, described
Drying equipment connects the packaging facilities；
Optional, the processing equipment of tungsten waste further includes transition equipment, and the transition equipment is connected to the solid-liquid point
From between equipment and the concentrator, the transition equipment is extraction equipment or ion interchange unit.
The utility model has the advantages that
In the present invention, the processing method is all applicable in common tungsten waste, including production hard alloy, tungsten carbide
Generated ground plate, the material that gathers dust, grinding material, waste product material etc. in powder, tungsten powder production process, the processing method fits raw material
Answering property is good, melts the limitation that cobalt content in method need to be lower than 10% without such as zinc；Moreover the present invention is by the way that tungsten waste to be granulated
Afterwards, the particle for being conducive to roasting is obtained, grain graininess is 0.1cm~10cm, ensure that appropriate in particle roasting process and air
Contact, aoxidizes the tungsten in tungsten waste, provides good reaction condition for subsequent reactions, also, roasts the waste heat generated and make
For basic heat source, cause reacting for roasting material and additive, reaction process heat release can maintain reaction to carry out, compared to additive with contain
Roasting direct obtains the thermal energy that melt has saved 50% or more after the mixing of tungsten waste material；Further, the present invention is by using carbonic acid
The additive system that sodium, sodium hydroxide, SODIUM PERCARBONATE match not only avoids air pollution present in prior art and asks
Topic, and the dosage of additive is greatly reduced, reagent cost is reduced, by W content detection hair in obtained solution
Existing, the rate of recovery of tungsten is more than 97%.In short, tungsten waste processing method process of the present invention is short, the rate of recovery is high, to tungstenic
The content of impurity element is not particularly limited in waste material, and adaptability to raw material is good, is a kind of environmentally protective processing method.It is described
Tungsten waste processing equipment invest small, strong applicability, be convenient for Operation and Maintenance.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing will be briefly described below, it should be apparent that,
The accompanying drawings in the following description merely relates to some embodiments of the present invention, rather than limitation of the present invention.
Fig. 1 is equipment connection schematic diagram provided by one embodiment of the present invention；
Fig. 2 is another equipment connection schematic diagram provided by one embodiment of the present invention.
Specific embodiment
The definition of part term used in the present invention is given below, other terms that do not address have well known in the art
Definition and meaning:
Tungsten waste: produced by being generated in process of metal working during the waste material containing tungsten, including production hard alloy
Ground plate, the material that gathers dust, grinding material, waste product material etc., in a preferred embodiment of the invention, mainly formed in waste material are as follows: tungsten quality
Content be 40%~95%, cobalt mass content be 0~20%, while also containing a small amount of other impurities element such as Fe, Cu, Ni,
C、Ta、Ti、Nb、Cr、V、SiO2Deng.
APT: english abbreviation, full name are Ammonium paratungstate, ammonium paratungstate.
There is no particular limitation in source of the present invention to tungsten waste, can be commercially available, and is also possible to according to existing
Waste material caused by during some CEMENTED CARBIDE PRODUCTIONs.A preferred embodiment of the invention, tungsten waste be
Ground plate, the material that gathers dust, grinding material and waste product material and tungsten carbide powder caused by during CEMENTED CARBIDE PRODUCTION, tungsten powder production
Ground plate in the process, the material that gathers dust, waste product material etc..
Partial size 0.1cm~10cm of graininess tungsten waste provided by the invention, preferably 1cm~3cm, such as 1.5cm,
Such as 2cm, such as 2.5cm, particle size and material be related with the contact area of air, was roasting to influence tungsten waste
Tungsten is oxidized degree in journey.
In the present invention, sodium carbonate, sodium hydroxide, SODIUM PERCARBONATE are matched, and are reacted with tungsten, the tungsten oxide in tungsten waste
Generate sodium tungstate, tungsten waste: sodium carbonate: sodium hydroxide: mass ratio=100:(5~10 of SODIUM PERCARBONATE): (20~50): (5
~20), preferred 100:(6~8): (30~40): (10~15), ingredient proportion and degree of oxidation of the tungsten waste material in roasting process
Related, the degree of oxidation of tungsten waste is higher, and the oxidant (SODIUM PERCARBONATE) of required supplement is fewer.
There is no particular limitation for condition of the present invention to the roasting, as long as enabling to the tungsten part quilt in tungsten waste
Oxidation.For example, the condition of the roasting, which includes temperature, to be 500-850 DEG C, preferably 550-800 DEG C；Time can be with
It is 2-4 hours, preferably 3 hours.Furthermore, it is necessary to it is to be noted that contain oxidizing gases in roasting system, the mode of realization can
Think and roast in air, or be passed through oxidizing gas, for example, oxygen, can know this those skilled in the art, herein
It does not repeat.
The processing method of tungsten waste provided by the invention mainly the improvement is that tungsten waste granulation, roasting and
Additive is added, and method that other water logging modes, sodium tungstate solution prepare sodium tungstate product or APT product etc. can be with
The prior art is identical, can know to this those skilled in the art, therefore not to repeat here.
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.It is real
It applies and particular technique or condition person is not specified in example, according to the literature in the art described technology or conditions or according to product
Specification carries out.Reagents or instruments used without specified manufacturer, being can be with conventional products that are commercially available.Under
In the embodiment in face, such as it is not known and illustrates, " % " refers both to weight percent.
Test method used below includes:
W content detection method includes: the tungsten in tungsten waste material --- and x-ray fluorescence surveys WO in tungsten waste material3、Co、Ni、Fe、
The method of Cu, Cr etc.；The method that tungsten in sodium tungstate solution --- tungsten concentration meter surveys tungstic acid content in solution；In cobalt nickel slag
Tungsten --- the method for total W content in potassium rhodanide colorimetric method for determining slag.
Tungsten waste used in embodiment is conventional commercial tungsten waste, is mainly derived from during CEMENTED CARBIDE PRODUCTION
Generated ground plate, the material that gathers dust, grinding material and waste product material, wherein tungsten mass content is 40%~95%, and cobalt mass content is 0
~20%, while also containing a small amount of other impurities element such as Fe, Cu, Ni, C, Ta, Ti, Nb, Cr, V, SiO2Deng.
Embodiment 1
Tungsten waste addition Granulation Equipments is granulated, the granular size 5cm of graininess tungsten waste；After being granulated
The graininess tungsten waste 300Kg arrived is sent into roasting apparatus, and 600 DEG C of maturing temperature, calcining time 4h obtains roasting material；Xiang Bei
Sodium carbonate 15Kg, piece alkali 100Kg, SODIUM PERCARBONATE 30Kg is added in imitation frosted glass while hot, utilizes roasting residual temperature the reaction was continued time 2h, shape
At the melt containing sodium tungstate；Melt containing sodium tungstate is poured into water logging slot, water logging time 0.5h obtains sodium tungstate solution and cobalt
Nickel slag.The rate of recovery of tungsten is up to 98.0%.
Embodiment 2
Tungsten waste addition Granulation Equipments is granulated, the granular size 3cm of graininess tungsten waste；After being granulated
The graininess tungsten waste 400Kg arrived is sent into roasting apparatus, and 800 DEG C of maturing temperature, calcining time 3h obtains roasting material；Xiang Bei
Sodium carbonate 32Kg, piece alkali 120Kg, SODIUM PERCARBONATE 45Kg is added in imitation frosted glass while hot, utilizes roasting residual temperature the reaction was continued time 3h, shape
At the melt containing sodium tungstate；Melt containing sodium tungstate is poured into water logging slot, water logging time 0.5h obtains sodium tungstate solution and cobalt
Nickel slag.The rate of recovery of tungsten is up to 97.5%.
Embodiment 3
Tungsten waste addition Granulation Equipments is granulated, the granular size 10cm of graininess tungsten waste；After being granulated
Obtained graininess tungsten waste 250Kg is sent into roasting apparatus, and 550 DEG C of maturing temperature, calcining time 3h obtains roasting material；To
Sodium carbonate 18Kg, piece alkali 75Kg, SODIUM PERCARBONATE 12.5Kg is added in roasting material while hot, utilizes roasting residual temperature the reaction was continued time
1h forms the melt containing sodium tungstate；Melt containing sodium tungstate is poured into water logging slot, water logging time 1h obtains sodium tungstate solution
With cobalt nickel slag.The rate of recovery of tungsten is up to 97.6%.
Embodiment 4
Tungsten waste addition Granulation Equipments is granulated, the granular size 4cm of graininess tungsten waste；After being granulated
The graininess tungsten waste 350Kg arrived is sent into roasting apparatus, and 700 DEG C of maturing temperature, calcining time 4h obtains roasting material；Xiang Bei
Sodium carbonate 28Kg, piece alkali 140Kg, SODIUM PERCARBONATE 52.5Kg is added in imitation frosted glass while hot, utilizes roasting residual temperature the reaction was continued time
2.5h forms the melt containing sodium tungstate；Melt containing sodium tungstate is poured into water logging slot, it is molten to obtain sodium tungstate by water logging time 1h
Liquid and cobalt nickel slag.The rate of recovery of tungsten is up to 98.7%.
Embodiment 5
Tungsten waste addition Granulation Equipments is granulated, the granular size 0.1cm of graininess tungsten waste；After being granulated
Obtained graininess tungsten waste 300Kg is sent into roasting apparatus, and 850 DEG C of maturing temperature, calcining time 2h obtains roasting material；To
Sodium carbonate 15Kg, piece alkali 100Kg, SODIUM PERCARBONATE 30Kg is added in roasting material while hot, using roasting residual temperature the reaction was continued time 2h,
Form the melt containing sodium tungstate；Melt containing sodium tungstate is poured into water logging slot, water logging time 0.5h, obtain sodium tungstate solution and
Cobalt nickel slag.The rate of recovery of tungsten is up to 97.2%.
Embodiment 6
The processing equipment of tungsten waste is shown in Fig. 1, comprising: Granulation Equipments, roasting apparatus, dust collection device, water logging slot, dnockout
Pump, solid-liquid separating equipment, concentrator, drying equipment, packaging facilities, wherein the Granulation Equipments is connected to the roasting and sets
Standby, the dust collection device is separately connected the Granulation Equipments and the roasting apparatus, and the roasting apparatus connects the water logging slot,
The water logging slot connects the solid-liquid separating equipment by the dnockout pumps, and the solid-liquid separating equipment connection concentration is set
Standby, the concentrator connects the drying equipment, and the drying equipment connects the guarantee equipment.
As another situation, the processing equipment of the tungsten waste further includes transition equipment, as shown in Fig. 2, described turn
Type equipment is connected between the solid-liquid separating equipment and the concentrator, and the transition equipment is extraction equipment or ion
Switch.The solution containing sodium tungstate is obtained into ammonium tungstate solution through transition by transition equipment, ammonium tungstate solution passes through steaming
Hair crystallization obtains APT product.
Comparative example 1
Other conditions are constant, and SODIUM PERCARBONATE additive amount in embodiment 1 is only changed to 3Kg, and the rate of recovery of final tungsten is only
75%.
Comparative example 2
Other conditions are constant, maturing temperature in embodiment 2 are only changed to 200 DEG C, the rate of recovery of final tungsten is only 60%.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of processing method of tungsten waste, it is characterised in that: the following steps are included:
Step 1: tungsten waste being granulated, graininess tungsten waste is obtained；
Step 2: the graininess tungsten waste that step 1 is obtained roasts, and obtains roasting material；
Step 3: additive being added in roasting material obtained in step 2 while hot, is melted after being reacted using the residual temperature after roasting
Body；
Step 4: the melt that step 3 is obtained carries out water logging, obtains solution and solid.
2. the processing method of tungsten waste according to claim 1, it is characterised in that: in tungsten waste described in step 1
Tungsten mass content is 40%~95%, and cobalt mass content is 0~20%；
Optional, granularity 0.1cm~10cm of graininess tungsten waste described in step 1, preferably 1cm~3cm.
3. the processing method of tungsten waste according to claim 1, it is characterised in that: the temperature of roasting described in step 2
For 500~850 DEG C, preferably 550-800 DEG C, the time of the roasting is 2~4h.
4. the processing method of tungsten waste according to claim 1, it is characterised in that: in step 3 additive be sodium carbonate,
Sodium hydroxide and SODIUM PERCARBONATE, solution described in step 4 are the solution containing sodium tungstate.
5. the processing method of tungsten waste according to claim 4, it is characterised in that: tungsten waste described in step 1
Quality: the quality of sodium carbonate described in step 3, the quality of the sodium hydroxide, the SODIUM PERCARBONATE quality=100:(5~
10): (20~50): (5~20), preferably 100:(6~8): (30~40): (10~15).
6. the processing method of tungsten waste according to claim 4, it is characterised in that: additive described in step 3 and institute
The time for stating roasting material reaction is 1~4h, preferably 2~3h.
7. the processing method of tungsten waste according to claim 4, it is characterised in that: the time of water logging described in step 4
For 0.5~2h.
8. the processing method of tungsten waste according to claim 4, it is characterised in that: pass through the solution containing sodium tungstate
Evaporative crystallization obtains sodium tungstate product, and it is molten that the solution containing sodium tungstate is either obtained ammonium tungstate through extraction or ion exchange
Liquid, ammonium tungstate solution obtain APT product by evaporative crystallization.
9. the product that the processing method of the described in any item tungsten wastes of claim 4-8 is handled, including contain sodium tungstate
Solution, sodium tungstate product, at least one of APT product.
10. the equipment of the processing method with the described in any item tungsten wastes of claim 1-8, it is characterised in that: include: to make
Grain equipment, roasting apparatus, dust collection device, water logging slot, dnockout pumps, solid-liquid separating equipment, concentrator, drying equipment, packaging are set
It is standby,
Wherein, the Granulation Equipments is connected to the roasting apparatus, and the dust collection device is separately connected the Granulation Equipments and institute
Roasting apparatus is stated, the roasting apparatus connects the water logging slot, and the water logging slot connects the solid-liquid point by the dnockout pumps
From equipment, the solid-liquid separating equipment connects the concentrator, and the concentrator connects the drying equipment, the drying
Equipment connects the packaging facilities；
Optional, the processing equipment of tungsten waste further includes transition equipment, and the transition equipment is connected to the separation of solid and liquid and sets
It is standby between the concentrator, the transition equipment be extraction equipment or ion interchange unit.
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| CN201810941873.0A CN109022763B (en) | 2018-08-17 | 2018-08-17 | Treatment method and equipment for tungsten-containing waste |
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|---|---|---|---|
| CN201810941873.0A CN109022763B (en) | 2018-08-17 | 2018-08-17 | Treatment method and equipment for tungsten-containing waste |
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| CN109897962A (en) * | 2019-03-14 | 2019-06-18 | 厦门钨业股份有限公司 | A kind of method and apparatus using tungsten in oxidizing semlting method recycling tungsten waste |
| CN110055401A (en) * | 2019-05-29 | 2019-07-26 | 厦门钨业股份有限公司 | A kind of method and device by tungsten waste production ammonium tungstate |
| CN110055402A (en) * | 2019-05-29 | 2019-07-26 | 厦门钨业股份有限公司 | A kind of processing method and processing unit of tungsten waste material |
| CN110714124A (en) * | 2019-10-16 | 2020-01-21 | 厦门钨业股份有限公司 | Method for extracting cobalt from tungsten waste recovery slag |
| CN111020234A (en) * | 2019-12-27 | 2020-04-17 | 厦门钨业股份有限公司 | Method for preparing APT (ammonium paratungstate) by utilizing tungsten-containing waste |
| CN111041208A (en) * | 2019-11-30 | 2020-04-21 | 福达合金材料股份有限公司 | Method for efficiently recycling copper and tungsten in copper-tungsten alloy waste |
| CN111057879A (en) * | 2020-01-02 | 2020-04-24 | 荆门德威格林美钨资源循环利用有限公司 | Process method for separating tantalum and niobium elements from hard alloy |
| CN113387387A (en) * | 2021-08-03 | 2021-09-14 | 崇义章源钨业股份有限公司 | Method for preparing sodium tungstate solution by utilizing tungsten-containing waste in short process |
| CN114875252A (en) * | 2022-05-13 | 2022-08-09 | 中南大学 | Method for recovering tungsten-containing waste |
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| CN109897962A (en) * | 2019-03-14 | 2019-06-18 | 厦门钨业股份有限公司 | A kind of method and apparatus using tungsten in oxidizing semlting method recycling tungsten waste |
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| CN110055401A (en) * | 2019-05-29 | 2019-07-26 | 厦门钨业股份有限公司 | A kind of method and device by tungsten waste production ammonium tungstate |
| CN110055402A (en) * | 2019-05-29 | 2019-07-26 | 厦门钨业股份有限公司 | A kind of processing method and processing unit of tungsten waste material |
| CN110714124A (en) * | 2019-10-16 | 2020-01-21 | 厦门钨业股份有限公司 | Method for extracting cobalt from tungsten waste recovery slag |
| CN111041208A (en) * | 2019-11-30 | 2020-04-21 | 福达合金材料股份有限公司 | Method for efficiently recycling copper and tungsten in copper-tungsten alloy waste |
| CN111041208B (en) * | 2019-11-30 | 2021-06-22 | 福达合金材料股份有限公司 | Method for efficiently recycling copper and tungsten in copper-tungsten alloy waste |
| CN111020234A (en) * | 2019-12-27 | 2020-04-17 | 厦门钨业股份有限公司 | Method for preparing APT (ammonium paratungstate) by utilizing tungsten-containing waste |
| CN111057879A (en) * | 2020-01-02 | 2020-04-24 | 荆门德威格林美钨资源循环利用有限公司 | Process method for separating tantalum and niobium elements from hard alloy |
| CN113387387A (en) * | 2021-08-03 | 2021-09-14 | 崇义章源钨业股份有限公司 | Method for preparing sodium tungstate solution by utilizing tungsten-containing waste in short process |
| CN114875252A (en) * | 2022-05-13 | 2022-08-09 | 中南大学 | Method for recovering tungsten-containing waste |
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