Method for Preparing 5N Purity Tungsten Bar or Tungsten Wire

The invention discloses a method for preparing a 5N purity tungsten bar or tungsten wire.

The method includes the following steps that (1) tungsten powders with above 5N purity are filled in a soft mold to be subjected to isostatic cool pressing to obtain an isostatic cool pressing blank; and (2) the isostatic cool pressing blank obtained in the step (1) is subjected to bar or wire manufacturing to obtain the 5N purity tungsten bar or tungsten wire. The tungsten bar or tungsten wire prepared by the method has the advantages that the purity can reach to above 5N (99.999%), and the tungsten bar or tungsten wire can be used for producing an electrode of a long service life gas discharge lamp. The method is high in production efficiency, stable in product qualities and suitable for industrialized production.

tungsten-bar


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Treatment Method for Dephosphorized Slag in Tungsten Metallurgy

The invention discloses a treatment method for dephosphorized slag in tungsten metallurgy, and mainly relates to a method for extracting and separating tungsten from tungstenic dephosphorized slag generated by a dephosphorizing step in an ammonium paratungstate production process.

The treatment method specifically comprises the following steps: immersing the dephosphorized slag generated by the dephosphorizing step in the ammonium paratungstate production process to an aqueous solution; after full reaction in a reaction kettle by adopting special leaching agents and activating agents, filtering to obtain a decomposing liquid and dephosphorized decomposition slag; washing the dephosphorized decomposition slag to enable the tungstenic WO3 to be less than or equal to 1.5%; feeding the generated decomposition liquid into a subsequent tungsten extraction process.

According to the process, the comprehensive utilization rate of mineral resources is improved, the recovery rate of valuable metal tungsten is improved, and the process flows of reusing tungsten are shortened.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Producing Pure Tungsten Compound Using Tungsten-containing Material

The method uses tungsten containing material including scheelite concentrate, high-calcium wolframite and its tailings, tungsten slime and refractory low-grade tungsten ore as material in producing tungsten compound. It features the addition of certain amount of aluminium oxide or aluminium salt and phosphate or oxides of phosphorus, 4-5 times leaching of ammonium paratungstate crystal obtained after the evaporation and crystallization of ammonium tungstate solution with 2-4% ammonium nitrate or ammonium chloride solution, and the precipitation of artificial white calcium tungstate from the ammonium paratungstate mother liquor and leaching liquor by adding ammonia water and sodium sulfide to regulate its basicity and then adding calcium chloride. The method has short technological process, high tungsten yield, low alkali consumption and no limit to P, Si and Ca contents in material and its product reaches the requirement of GB3457-820 to 0-level WO3 product.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Method for Directly Manufacturing Heavy Pressure Blank Strength Tungsten Powder With Ammonium Metatungstate

The invention discloses a preparation method of high pressed compact strength tungsten powder by ammonium metatungstate (AMT) direct hydrogen reduction.

The tungsten powder prepared by the invention is directly formed into high-intensity pressed compacts without adding any forming agents, and the transverse rupture strength of the pressed compacts reaches 2.5 to 4.0MPa. The tungsten powder prepared by the invention can be widely used for preparing large tungsten products and tungsten alloy products. In the method, ammonium metatungstate is used for direct reduction, and calcination and other intermediate processes are not necessary, thereby process is simple and energy consumption is low.

The granularity of the tungsten powder prepared by the method is controlled to be homogeneous and the sintering activity is high, thereby being benefit for the preparation of high-performance tungsten products.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Technique for Producing Tungstic Acid

This technique describes that the commercial sodium tungstate solution is added by H2O2 as complex agent, was decomposed directly into tungstic acid by sulfur dioxide, sulfite or bisulfite in low acidic hydrogen chloride of 0.5-2N at room temparature 10-28 deg.. This technique has abolished some processes like the remove of Mo and CaWO4 comparable to traditional process. It reduces the amounts of consuming-acid, consuming-energy and polution. The tungstic acid product is powder type, high purity, high activity and converted easity into other tungstate products. The yield of tungstic acid was about 98%, 10% higher than traditional one.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Annealing Tooling for Tungsten or Molybdenum Metal Plates and Tungsten or Molybdenum Alloy Plates

The utility model relates to an annealing tooling for tungsten or molybdenum metal plates and tungsten or molybdenum alloy plates.

The plate (1) to be annealed and a clamping plate (2) made of an industrial ceramic material are clamped in a staggered manner so as to form the composite layer annealing tooling constituted by the plate (1) and the clamping plate (2). The clamping plate (2) is made of silicon carbide, zirconium oxide, aluminum oxide and silicon nitride. The annealing tooling disclosed by the utility model has the advantages of being capable of ensuring the flatness and the roughness of the two surfaces of the plate after annealing of pure tungsten, pure molybdenum, tungsten-copper alloy or molybdenum-copper alloy plate, simplifying the post-machining procedure and improving the working efficiency.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Method for Preparing Tungsten Carbide by Using Regeneration Tungsten Powder

The present invention discloses a method of regenerating a tungsten carbide powder is prepared.

For regeneration tungsten powder particle size larger than the surface area of ​​small, chemically active poor, difficult to directly use the traditional method of producing high-quality tungsten carbide problem, using a two-step method for regeneration of tungsten carbide, carbide powder. First by carbon black: = 3.0-3.5:100 tungsten powder (weight) of the ingredients were mixed in a ball mill, the graphite tube furnace at a temperature of carbon 1800-2000 ℃, carbonization time was 50-80 minutes at once carbide; and a carbon content analysis of the resulting compound of the carbide, the addition amount of carbon black and mixed in a ball mill, a carbon graphite tube furnace at a temperature in the carbonization 1500-1700 ℃, carbonation time of 60-90 minutes the conditions secondary carbonization.

The carbonized product was subjected to the second milling, sieved to obtain the final tungsten carbide products. The method is simple, easy to implement, stable income tungsten carbide powder quality.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Arc Melting Method of Tungsten Alloy With High Tungsten Content

A high content of tungsten arc melting method tungsten alloy, comprising the following steps: ① raw material for tungsten powder compacts, get blank; ② blank broken into particles of tungsten powder compacts; ③ particles of tungsten powder compacts with other Metal materials are mixed, tungsten powder compacts weight ratio of the particles added 0.1% ~ 40%; ④ and then through the vacuum arc melting at least twice to obtain a uniform high tungsten content component tungsten alloy ingot. Preparation method of the present invention is to obtain the highest tungsten content of up to 40% of the ingredients uniformly, without segregation, high tungsten content alloy without inclusions.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

Manufacturing Method for Copper-tungsten Alloy of a Tungsten Framework

The present invention discloses a method for producing a copper-tungsten alloy of tungsten skeleton, using a metal compound surface-coated tungsten powder particles, obtained by the H2 reducing atmosphere to the metal-coated tungsten powder; and then mixed with a pore-forming agent made of copper-free mixture of After the powder, then pressing briquettes remove pore-forming agent, and finally sintered honeycomb pure tungsten skeleton, copper infiltration, that was the formation of tungsten skeleton copper tungsten alloy. This method of manufacturing copper tungsten alloy anti-burning performance, high reliability.

A method of manufacturing a copper-tungsten alloy of a tungsten skeleton, characterized by comprising the steps of: tungsten powder particle surface of the compound of the transition metal of the cladding layer, and in a hydrogen atmosphere at 600 ~ 1000 ° C to a reduction treatment ; Then, a pore forming agent added thereto were mixed uniformly mixed pressing compacts in a mold, then removing the pore-forming agent to form a tungsten honeycomb skeleton, and in a hydrogen atmosphere at 1450 ° C ~ 1550 ° C at a temperature pre-sintered tungsten skeleton is bonded, the final copper placed on a sintered tungsten skeleton, copper infiltrated tungsten between the skeleton, the skeleton is formed of copper tungsten, a tungsten alloy; compound of a transition metal of group NiCl2.6H20 , which was dissolved in absolute ethanol to form a solution of the tungsten powder coated particles; the pore-forming agent chosen paraffin wax dissolved in a solvent to form the oil was added; the specific method of removing the pore forming agent is: the pressing the briquettes in a hydrogen atmosphere to remove the paraffin wax at a temperature of 300 ~ 500 ° C; wherein the tungsten is placed on a copper skeleton after sintering conditions: hydrogen gas atmosphere at a temperature of: 1400 ° C ~ 1550 ° C.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com
The above is rep

A Use of Low-grade Tungsten Waste Slag APT Regeneration Method

The invention belongs to the field of recycling of tungsten resources, in particular to a use APT (ammonium paratungstate) waste slag produced low-grade tungsten produced during regeneration APT approach.

The present invention discloses a low-grade tungsten APT waste slag regeneration APT method, by improving the traditional soda sintering process parameters to achieve, its steps are as follows:.. A abrasive and ingredients; b slag calcined; c wet. grinding and filtration;. d a double ion exchange impurity;. e evaporation and crystallization to produce APT. The present invention can reduce the waste of resources, improve resource utilization, through low tungsten APT waste slag recycling, can improve the economic efficiency of enterprises; the method according to the invention is suitable for processing WO3 grade in the range of 2-10% Low waste slag tungsten and tungsten concentrate to overcome the waste of raw materials and processing technology to match the existence of the defect, can effectively improve the recovery of tungsten, reducing environmental pollution; by practice of the invention can be extended China's tungsten resources service life, ease the current situation of supply shortage of tungsten resources, can effectively reduce waste emissions and reduce environmental pollution.


Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:   sales@chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Prices, WML Version: http://m.chinatungsten.com

The above is reproduced from: Application Technology Network, if in doubt, please contact the content belongs website.

 

 

WeChat

Tungsten Metal

Tungsten Metal Price

Tungsten Alloy

Tungsten Alloy Price

Tungsten Carbide

Tungsten Carbide Price

Tungsten Powder

Tungsten Powder Price

Tungsten Copper

Tungsten Copper Price

Tungsten Oxide

Tungsten Oxide Price