Tungsten Powder Price

Nickel Hydroxocarbonate, Ammonium Paramolybdate and Ammonium Metatungstate

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 17:06; Written by zsq; Hits: 447

The interaction of nickel hydroxocarbonate, ammonium paramolybdate, and ammonium metatungstate (Ni:Mo:W= 3: 1:1) is reported.Under mechanical activation conditions, nickel hydroxocarbonate particles undergo comminution and ammonium paramolybdate and ammonium metatungstate particles soften and aggregate.It is demonstrated by DTA,X-ray diffraction and IR spectroscopy that heat treatment of the mechanically activated mixture at400–450°C yields the salts NiMoO4 and NiWO4.Nickel Hydroxocarbonate, Ammonium Paramolybdate and Ammonium Metatungstate

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Ammonium Metatungstate Has Different Class

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 17:01; Written by zsq; Hits: 418

Ammonium metatungstate applied in the manufacture of various petrochemical catalysts, It's the basic raw material of W-base catalyzer used in oil refinery.

Class	AMT-1	AMT-2
WO3(%)	≥88	≥84
Water Solubility	300g/100ml
Fe	0.002	0.005
Si	0.002	0.006
Mo	0.01	0.03
Cu	0.001	0.001
M	0.001	0.001
Mg	0.001	0.001
Sn	0.0001	0.002

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How to Use a Dart in Practicing?

Details: Category: Tungsten Information; Published on Monday, 02 February 2015 20:16; Written by xsh; Hits: 444

There are some several suggest for dart practice:

In nearly all settings, a shared set of darts is used, rather than every competitor having their own darts. So if you were to retrieve the darts you just threw, all you would then do is immediately hand them to the next player. With that in mind, it is simply quicker for the incoming shooter to remove the darts from the board, rather than the awkward process of the preceding shooter removing them, then (carefully) passing a handful of three sharpened steel darts to the next player.

The next player can view and verify the score of the preceding player. This eliminates the need for a scorekeeper to stand near the board.

Dart maintenance supplies (like a potato, for moistening the dart tips, or a sharpening stone) are often kept at the board. Thus requiring every player to go the board before they throw rather than after, allowing him or her prepare quickly in the darts practical.

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MSDS of Tungsten Bar(b)

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 08:52; Written by Sherry; Hits: 483

HEALTH HAZARD DATA

Routes of Exposure: Production and applying process might bring about dust of potentially hazardous ingredients, which can be inhaled, swallowed or come in contact with the skin or eyes.

Effects of Overexposure:
Inhalation - Dust from grinding can cause irritation of the nose and throat. It has also has the potential for causing transient or permanent respiratory disease, including occupational asthma and interstitial fibrosis, in a small percentage of exposed individuals. It is reported that cobalt dust is the most probable cause of such respiratory diseases. Symptoms include productive cough, wheezing, shortness of breath, chest-tightness and weight loss. Interstitial fibrosis (lung scarring) can lead to permanent disability or death. Certain pulmonary conditions may be aggravated by exposure.
Skin Contact –Can cause irritation or an allergic skin rash due to cobalt sensitization in case tungsten be used in production process. Certain skin conditions, such as dry skin, may be aggravated by exposure.
Eye Contact - Can cause irritation.
Ingestion - Reports outside the industry suggest that ingestion of significant amounts of cobalt has the potential for causing blood, heart and other organ problems.

Emergency and First Aid Procedures: Applicable for dusts or mists.
Inhalation - If symptoms of pulmonary involvement develop (coughing, wheezing, shortness of breath, etc.), remove from exposure and seek medical attention.
Skin Contact - If irritation or rash occurs, thoroughly wash affected area with soap and water and isolate from exposure. If irritation or rash persists, seek medical attention.
Eye Contact - If irritation occurs, flush with copious amounts of water. If irritation persists, seek medical attention.
Eye Contact - If irritation occurs, flush with copious amounts of water. If irritation persists, seek medical attention.

Carcinogenic Assessment (NTP Annual Report, IARC Monographs, other):
None of the components of this material have been identified as known suspected carcinogens by NTP, IARC or OSHA

Chemical Name:
Tungsten and tungsten material, tungsten-nickel-copper or tungsten-nickel-iron heavy alloy.

tungsten-bar

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General Scoring Rules

Details: Category: Tungsten Information; Published on Monday, 02 February 2015 20:05; Written by xsh; Hits: 468

The thin wires separating the scoring sections on the board occasionally overlap slightly, due to the manufacturing process. Any dart splitting the wires (landing in the tiny area where two wires overlap) is credited in the shooter's favor. For example, if the dart splits the wires separating the two and three point zones, the player is awarded three points. If the dart splits the wires separating the three point zone and the blue ring, the player is credited with three points.

Since the shafts of the darts are made from wood, and the tips are sharpened metal, it is possible for a dart to stick into the shaft of a previously thrown dart. The scoring of any dart is determined by where the tip of the dart lands, and since the tip of this dart is not in the board, the dart that is stuck in the barrel of another scores no points at all. It is considered the same as if it missed the board.

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