Demand has not yet improved tungsten, tungsten business confidence weakened further, low operating enthusiasm, both by manufacturers offer relatively lower last week, this week, the price of tungsten-based product or have different magnitudes of decline, in which the tungsten ore, tungsten, iron relatively small decline .

Macro level, state-owned enterprises mergers and acquisitions tide brewing; day four railway projects approved by the State, with a total investment of over 140 billion; US Dow, S & P 500 index highs, the price of gold rising continuously.


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Downstream alloy manufacturers to purchase less scrap tungsten steel, tungsten steel scrap spot market poor circulation, there are a small amount of material needs better, but this kind of waste tungsten blade domestic demand, especially poor, leading to scrap tungsten blade domestic price declines greater.

I know that poor scrap tungsten steel market demand is still active in the market of tungsten scrap traders to reduce the risk, tried to suppress the inquiry, overall prices have declined relative to last week's 2-4 yuan / kg, particularly domestic blade Inquiry constantly dropping sharply lower, as low as the current domestic inquiry blade 130 yuan / kg.


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Tungsten market: tungsten market low consolidation mainly by the cost of supporting and cargo operators reluctant to sell, tungsten-based product prices gradually stabilized stabilized, but the offer is still relatively high decrease, the whole tungsten market is still stable and slightly weaker. Downstream alloy manufacturers to purchase less scrap tungsten steel, tungsten steel scrap spot market poor circulation, there are a small amount of material needs better, but this kind of waste tungsten blade domestic demand, especially poor, leading to scrap tungsten blade domestic price declines greater.

Tungsten Market low consolidation mainly by the cost of supporting and cargo operators reluctant to sell, tungsten-based product prices gradually stabilized stabilized, but the offer is still relatively high decrease, the whole tungsten market is still stable and slightly weaker.

Macro level, China for the first time in seven months holdings of US debt, the largest creditor to regain the throne; SAT introduction of new measures, services exports zero tax or tax-free; international crude oil market continues to share battle.


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As we know, CT scan was performed with the patient in the supine position, to avoid any let out of the radiation, owning to the high density and good radiation absorption, tungsten alloy material is widely used for the linear accelerator equipped with 40 pairs of multi-leaf collimator (MLC), which is used for CT scan radiation protection in the mantle field.

The MLC's shapes could be designed into take the shape of the conventional customized blocks used for treatment of mantle field, also it could be sheet or ultra-thin sheet, etc. The anterior mantle field is divided into three separate MLC segments with the collimator kept at 0°. The first MLC segment is shaped to cover the neck, clavicular regions and mediastinum. The second and the third MLC segments covered the right and left axilla, respectively. Tungsten alloy material is used for the leaves. Each leaf is about 10 mm or less, and is individually motorized and computer controlled to allow precise control of the shape of the beam.

Depending on the superior properties of tungsten alloy, MLC is located between the source of radiation and the patent. By opening tungsten alloy leaf, the operator allows radiation to pass through at that point but not to let out. This gives the operator precise control over the shape of the beam during CT scan.

Because overseas tungsten concentrate market demand continues to slump, the CIS export prices decline further tungsten concentrate. However, spot market transactions are still scarce. A wolframite 40% of monthly production of about 195 tons producers said this week in the CIS region wolframite 40% price drop to $ 160 / metric ton, last month fell by $ 10 / metric ton. But overseas buyers are still not positive, wait for a lower offer. "We received a number of overseas buyers inquiry, but the other intention purchase price of $ 120 / metric ton or so, therefore, there is no deal," the source said.

Ukraine a 55% tungsten concentrate trader confirmed that the CIS region is now 55% tungsten concentrate market prices in the $ 180-185 / metric ton, last month fell by $ 5 / metric ton. But few buyers to cover short positions.

According to the manufacturer revealed that, due to the current international tungsten concentrate prices continued to decline, the market outlook, the majority of buyers on the sidelines. And in view of the victory of the holiday Wujiu Russia (5.9-5.11) approaching, they also offer suspended, waiting to see the market outlook.

The trader also said they do not have any tungsten concentrate 55% of stock, after receiving orders to start shopping. Now that 55% of tungsten concentrate prices declined, they do not rush to cover short positions, waiting for the producers lower offer.


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Tungsten market: tungsten market operated smoothly and take the goods to low tungsten businesses are not enthusiastic, spot transactions less than normal, short-term market sentiment hard tungsten powder, tungsten or disadvantaged price stability maintenance, APT mainstream price or hovering 12.2-12.4 ten thousand yuan / tons. Overseas tungsten concentrate market demand continues to slump, the CIS tungsten concentrate export prices decline further. Now that the international tungsten concentrate prices continued to decline, the market outlook, the majority of buyers on the sidelines.

Tungsten Market smooth operation, low tungsten businesses take the goods are not enthusiastic, spot transactions less than normal, short-term market sentiment hard tungsten powder, tungsten or disadvantaged price stability maintenance, APT mainstream price or hovering in 12.2-12.4 yuan / ton.

Macro level, in April the national fiscal revenue 1.3502 trillion, an increase of 22% consumption tax; the State Department and then canceled 49 non-administrative licensing approval: reduce power rent-seeking; in April year on year increase of 1.3% in electricity consumption.


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Multi-leaf collimator usually includes a plurality of leaves, a leaf guide configured to support the plurality of leaves, and a plurality of magnets. Each leaf includes a blocking portion that is radio opaque, a drive portion connected to the blocking portion, and a coil embedded in the drive portion. The coil is operatively connected to an electrical current source to generate a first magnetic field. The leaves have the capability of moving at speeds of 50 cm/s up to and higher than 1 m/s.

The present invention generally relates to radiation therapy. In various respects, the invention is directed to a highly responsive multi-leaf collimator, and method of use to provide radiation therapy utilizing beam shaping, intensity modulation and combinations thereof including simultaneous beam shaping and intensity modulation of therapeutic beams. Also the most important material for its radiation absorption is tungsten alloy material, which is a kind of high density, excellent machinability and good environmental-friendly. Tungsten alloy material plays a vital role for multi-leaf collimation radiation protection.

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National tungsten concentrate (tungsten trioxide content of 65%) of the total 2015 annual production control target of 91,300 tons, including 73,300 tons of main mining indicators, utilization indicators 18,000 tons. China rare earth ore (rare earth oxides REO) total production control target of 105,000 tons, wherein the ionic (with heavy rare earth-based) index 17,900 tons of rare earth ore, rock type (light) 87,100 tons of rare earth ore index.


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