Tungsten is a very valuable resource of rare metal resources, one of the tungsten industry as an important modern industrial materials industry, is significant.

Tungsten is a hardness, melting point, high strength and good metal, machinery, steel, defense industry and other fields are widely used. Its main application is the carbide industry, it is often said of tungsten steel. Carbide is called modern industry teeth. Tungsten resources as an important strategic resource, and more emphasis on the protection of world powers tungsten resources. Our country has also set up since the 1990s Industry Association, introduced a number of laws and regulations, strict supervision, tungsten resources.

Global reserves of tungsten resources are scarce, centralized distribution. China has proven reserves of 65.5% of the world, it has obvious advantages. Since 2001, China began to implement tungsten resource extraction quotas and export quotas, effectively inhibited the global tungsten supply. Coupled with decreasing the amount of foreign supply, limited availability of recycling waste tungsten, tungsten supply growth is slow.

Tungsten carbide is mainly used in steel and alloys, chemical industry, which accounted for an amount of carbide about 50%. Production of carbide cutting tools only about 25% of total production, 65% of consumption in developed countries accounts for carbide cutting tool consumption, China's carbide broad space for development in the future. "Twelfth Five-Year Plan" clearly encourage new materials containing tungsten or tungsten as a new impetus to the demand.

Tungsten resources are rare Chinese have absolute advantage, as the country gradually strengthen the industry consolidation, supply growth will gradually slow down, while demand in areas such as carbide rapid growth in the long term, the future supply of tungsten would be more many in the tight state. Our industry relies on tungsten carbide absolute advantage in the inevitable development resources more quickly.


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Bearish sentiment dense tungsten businesses, operating actively weak, tungsten spot market volume was light this week, there is still a low risk of tungsten-based products was down, the domestic scrap tungsten blade or fell 110 yuan / kg in the vicinity.

Macro, agency says about 7% GDP growth in the second quarter, there is room for adjustment of monetary policy; the policy of stimulating investment growth is expected to stabilize in the second half economic rebound; eight of the Steering Group to supervise operations throughout the organization functional integration.


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Producing fine tungsten powder by hydrogen reduction of tungsten hexachloride, the producing process which are as follows:
1. Firstly, putting tungsten at middle of the inner tube, each charging amount of 1-1.5kg.
2. After beginning of the experiment, through hydrogen in both inside and outside  tube in the case of heating, the temperature of the chloride reaction section of tube is heated to 800 ℃, the reduction reaction of tube heating to 1000 ℃. The temperature was raised to the desired temperature, heat preservation for 1 hour. So it can remove the water of reactor surface and raw material’s oxide films by through hydrogen.
3. Continue through the hydrogen of outer tube, but the inner tube was stopped through hydrogen, argon instead be used to remove the inner tube of hydrogen.
4. After the inner tube of hydrogen divisible, with argon gas and chlorine gas introduced into the tube, so that the reaction of chlorine and tungsten to produce gaseous tungsten hexachloride and tungsten pentachloride mixture.
5. With the reaction proceeds, tungsten chlori from the inner pipe into the outer reaction section tube, and contact with outer tube hydrogen to form fine tungsten powder.

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Tungsten market: tungsten market continues deserted run, end demand downturn, tungsten ore buyer continued to suppress the inquiry, inquire as low as 50 degrees scheelite 65,000, most of tungsten ore into a loss, the development of the tungsten industry faced relatively great difficulty. But hold stocks low sellers, buyers and sellers stalemate, the spot market turnover less material to late ore prices or to low consolidation.

Three brothers Partnership theft wolfram fine tailings, when stolen smugglers busted. July 7, 2015, Hunan Rucheng County Public Security Bureau police successfully cracked a small wall three brothers partnership wolfram mine tailings case of theft, illegal and arrested three suspects.

July 4 at 3:00 pm, a small town Zouma village tea foot of wall Tungsten charge Telephone police said: the recent fine tailings wolfram ore unit stolen several times, the loss of several thousand dollars. After receiving the alarm, police quickly to the scene to investigate.

After reaching the scene, police immediately scene, and retrieval of surveillance data forensics, however, police at the scene did not find any stolen valuable clues. Plus thief Select theft of the time late at night, the police is difficult to see from the shape characteristics thief video surveillance, only a total of three people who generally see crime.

Although sufficient evidence for a time was not found, but the police after repeated comparison that: The tungsten mine several times are the same persons as stolen, you can basically lock total of three suspects. Because the gang theft experienced, skillful, it is likely to commit a crime again.

In determining the above information, the police will inform the person in charge of the mine, the group is likely to further crime, asking them to arrange mine control room personnel for 24-hour surveillance, once the case to the police immediately. Too alert the police to evacuate the mine, manufacture calm illusion. Hard work pays off, July 7, police again received mine responsible for the alarm call. When the police arrived on the scene, the three thieves steal enthusiastically positive, police approached one fell swoop arrested three suspects.

Under questioning, the three suspects named Zhou per capita, the Department of the three brothers, three of the partnership fine tungsten ore tailings theft, the illegal profits of more than 8,000 yuan confessed.

Currently, the three suspects had been under criminal detention.


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Tungsten ore buyer continued to suppress the inquiry, inquire as low as 50 degrees scheelite 65,000, but hold stocks low sellers, buyers and sellers stalemate, the spot market turnover less material to late ore price range or the low consolidation.

Macro, CPI 10 consecutive months at "1 times", monetary policy will continue to loose; China PPI 40 consecutive months, fell; IMF lowered this year's global economic growth forecast to 3.3%.


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Tungsten market: although Luomu announced the establishment of a special fund tungsten business of purchasing and storage, but it is understood Luomu recently still sold tungsten products, market participants suspect that the purchasing and storage may be more slowly store their produce tungsten mine, not out 3 billion to put into the tungsten market, and therefore weak demand market, the Luomu this initiative or less late effects on the price of tungsten ore price continued low.
 
Molybdenum market: today's molybdenum market reality no market at all, daily market seems sameness circumstances, trading deserted, manufacturers operating difficult dilemma revealed. Bidding steel prices continue to decrease, ferromolybdenum market can not expect too much and then send in steel strokes. Participants frequent heart fell, difficult for them to have a market enthusiasm, the current market can look forward to an early bottoming out. Market participants should enhance risk aversion, short-term risks remain.

Mungana Goldmines Limited announced that, as part of the North Queensland Mungana's Chillagoe project exploration agreement, Newcrest Mining has started exploration activities. Under the agreement, Newcrest will spend up to $ 20 million for a period of eight years of exploration, focus on exploration Chillagoe region of large gold - copper porphyry deposits. Newcrest's exploration program will Mungana in Chillagoe, including strategic King Vol deposit development of high-grade zinc and base metals assets simultaneously.

Black Rock Mining Ltd announced its latest project Mahenge graphite exploration activities in Tanzania. Since the 11 months before the start of exploration in Mahenge, the company mobilized two rigs and the largest field operations team. Exploration found 186 meters from the graphite content of 5.95 percent total, including two high-grade zone, 24 meters at 7.89% content and 86 meters at the content of 8.34 percent.

Vital Metals Ltd announced that due to positive correction final feasibility study, lower capital, operating cost reduction and a favorable exchange rate variation support, making 70% of its stake in North Queensland Watershed tungsten project further boost. In addition, the main tungsten market demand, China, India and the United States is entering an important stage of consumption.


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Although Luomu announced the establishment of a special fund tungsten business of purchasing and storage, but it is understood Luomu recently still sold tungsten products, market participants suspect that the purchasing and storage may be more slowly store their produce tungsten ore, and not out 3 billion to put into the tungsten market, and therefore the current market downturn, the move Luo molybdenum or tungsten price less affected ore prices continued at low levels.

Macro, June CPI data released today, rose 10 consecutive months, or less than 2%; second quarter report showed consumer confidence optimistic stable, up 9.1 upgrade; Greek debt negotiations weekend and then meet the deadline.


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The construction of complex tungsten collimators with a high number of pinholes or loft holes becomes very expensive with the current available techniques (drilling, milling or electric discharge machining). All these techniques are subtractive techniques; the process starts with a solid plate and the holes are made by removing material. The main factor determining the cost is the production time and the amount of required material. The production time is related to the amount of holes and the complexity of the holes. Other materials like gold or platinum that are easier to machine are very expensive, alternative techniques like cold casting with tungsten epoxy result in a lower density (close to lead, 11g/cm^3). This results in transmission of high energy peaks in the emission spectrum through the plate and to a relative high amount of pinhole edge penetration. The new technique called novel technique has been found for collimator construction, called metal additive manufacturing. The collimator is build up in layers using selective laser melting of tungsten powders.

Methods: A collimator design with 20 loft holes with 0.5 mm pinhole opening was designed in CAD software and the resulting STL file was sent to the rapid prototyping company. Within 2 weeks the collimator (16 mm thick and 48x48 mm transverse size) was produced. The density of the collimator was determined by determining the volume (in the CAD program) and measuring the weight. The collimator was attached to a compact high resolution Single Photon Emission Computed Tomography detector (SPECT detector) and a point source has been measured.

Results: The predicted accuracy of this rapid prototyping technique is +/- 50 micron. The density of the material is 16.9g/cm^3. A point source located 2cm in front of the collimator is seen by all apertures. Metal additive manufacturing allows fast prototype collimator design of very complex shapes. The density is close to tungsten (87%). The cost of this technique is only related to the amount of material needed.

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