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New Production Method of Spherical Tungsten Powder 126

At present, the preparation methods of spherical tungsten powder include: (1) plasma method; (2) tungstate hydrogen reduction method; (3) tungsten halide hydrogen reduction method; (4) cyclic oxidation method. Although they can prepare spherical W powder, they have the disadvantages of complex process, long production cycle, low production capacity, high manufacturing cost, low sphericity, and uneven product particle size distribution. Therefore, the following will introduce a new production method of spherical tungsten powder. The specific steps are as follows: (1) Weigh…

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China Wolframite Output Accounts for 90%, Scheelite 10% 209

Currently there are two types of minerals in China: wolframite and scheelite. Tungsten is a kind of rare metal and significant strategic material. It is called “heavy stone” from ancient China. In 1783 tungsten was named by the Spaniard DE Puria. The tungsten content in the crust is 0.001%. Generally the tungsten ores are formed for the activity of granitic magma. Tungsten is a silver-white shiny?metal with high melting point and high hardness after smelting. There are more than 20…

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China Tungsten Reserve and Tungsten Output Rank Top 206

China?has the?largest?tungsten reserve?and tungsten output?whose reserve?are four times of ?other countries in the world, tungsten ore?was?found early 10th century and was?called “heavy stones” at that time.Tungsten ore in China is?mainly located in the Sanjiang tungsten tin metallogenic belt,West Qinling-Qilianshan metallogenic belt, Tianshan-Beishan metallogenic belt, south China metallogenic belt and north China metallogenic belt. Nanling metallogenic belt?is the most richiest in south China metallogenic belt, and numerous large and super large tungsten ores are distributed in this metallogenic belt with more…

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Polymer Tungsten CT Protective Clothing 393

Polymer tungsten CT protective clothing is a new type of lead-free medical protective products. Its X-ray shielding rate can reach 99%. And it is much lighter than traditional lead protective clothing, so it is more suitable for providing X-ray protection for patients and medical staff. More details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html As we all know, in modern medicine, the use of X-rays has brought great benefits to medical diagnosis and radiotherapy, but at the same time, it will also damage the…

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How to Prepare Polymer Tungsten Medical Ray Protective Material? 348

How to prepare polymer tungsten medical ray protective material? First, prepare components including the following parts by weight: tungsten powder 950-1000, tungsten fiber 0-50, high-molecular polymer 20-100, coupling agent 0.5-5, and other auxiliary agents 0.5-10. Wherein, tungsten powder is tungsten powder or a mixture of several tungsten powders with a Fischer particle size of 0.4 μm to 60 μm; the diameter of tungsten fiber is 10 to 30 μm, and the aspect ratio is 50 to 150; and high molecular…

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Tungsten Alloy X-ray Protective Plate 369

Tungsten alloy X-ray protective plate is tungsten alloy plate made of tungsten-nickel-iron alloy or tungsten-nickel-copper alloy, whose protection effect against X-rays is better than that of traditional lead block. Moreover, its smaller size is more suitable for the current trend of miniaturization of medical devices. In addition, the tungsten alloy shielding material will not produce bremsstrahlung, so the plate will not produce radiation pollution, not affect the treatment results, and not cause damage to normal tissues. More details, please visit:…

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Tungsten Rubber Medical Ray Protective Material 432

Tungsten rubber medical ray protective material is a new type of lead-free material that has good shielding effect on medical X-rays and γ-rays. It is prepared by extrusion molding, injection molding or compression molding process using W powder, high molecular polymer, etc. as raw materials. This new type of soft shielding material does not contain lead, and is environmentally friendly and non-toxic. Also, it has good toughness, but it is soft and easy to form. It can be cut into…

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Tungsten Alloy Medical Ray Protective Material 356

Tungsten alloy medical ray protective material is tungsten-nickel-iron alloy or tungsten-nickel-copper alloy used for shielding medical radiation sources such as X-rays and gamma rays. The difference between the two tungsten alloy materials is that tungsten-nickel-iron alloy has certain ferromagnetism, and its mechanical properties and processing properties are superior to tungsten-nickel-copper alloy. More details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html Tungsten alloy is a new type of medical radiation shielding material that is denser than traditional lead materials. And it is environmentally friendly and…

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Tungsten Rubber X-ray Protective Clothing 379

Tungsten rubber X-ray protective clothing is a new type of environmental friendly medical shielding clothing designed to replace traditional lead protective clothing (Tungsten rubber has better X-ray shielding performance than lead.). In the early days, medical X-ray protective clothing mostly prepared using lead as a shielding material, so it was heavy in weight and hard in texture. More details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html While if medical workers involved in radiotherapy wear light, soft tungsten rubber X-ray protective clothing, it can not…

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Tungsten Resin X-ray Protective Screen 326

Tungsten resin X-ray protective screen is a medical X-ray shielding screen made using polymer as matrix and tungsten powder as filler. It non-toxic, light weight, and easy to move. It also has advantages of environmental protection, good radiation absorption performance, and stable chemical performance. It can be used for angiocardiography. More details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-radiation-shielding.html At present, lead is used as an X-ray shielding material in producing medical protective screens. Although its shielding effect is good, the cost is low…

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