The density of tungsten copper points -Cu20W80, will decline when you add rare earth (Ce)/rare earth oxides (CeO₂) to it. What’s worse, its density declines as the increase of additive amount. In theory, the density of Ce (6.77 g / cm³) and CeO₂ (7.10 g / cm³) lower than Cu20W80s’, which is 15.64g / cm³. So, the density of tungsten copper points’ density with Ce will be smaller when the additive amount of Ce or CeO₂ is larger.
The density of tungsten copper points decreases significantly if the amount of Ce is 1%; the density would not decrease substantially if Ce’s amount is from 1% to 3%; the actual density is relatively higher if the density is of 3 %( the optimum amount of Ce).
The density of Cu20W80 declining unevenly, and along with dramatic change trend. With the increase amount of CeO_2, its value reduces significantly. Nevertheless, the density value change relatively flat and upward slightly when its amount is from 5% to10 %. In a word, tungsten copper points with Ce is better, whose optimum addition amount is from 1% to3%.



 

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Weijia tungsten ore is located at Xiang Linpu Town, Hunan Province. It is in the Xiang Linpu porphyry groups near the Tong Shanling porphyry. The large skarn type deposit was detected using comprehensive exploration method during the recent exploration activities in China. Being buried deeply in 500mand covered by limestone and thick soil in the surface, it has hardly been indicated by traditional pathfinder elements. It is proved that hydrocarbons promoted the transport and enrichment of elements in the ore forming, so Weijia tungsten ore is taken as a case to study the effect of hydrocarbons to the concealed deposits in coverage area. Acidolysis hydrocarbon of 46rock samples in ZK801and heat release hydrocarbon of 3 soil profiles were analyzed. The results show that the contents of hydrocarbons decrease from porphyry, ore body to wall rock, and the rates of methane, olefins and heavy alkane are different in porphyry, ore body and wall rock. The standard curves shapes of ore are similar to those of the porphyry and wall rock. The soil heat release hydrocarbons show bimodal distribution and low value above the ore body. This study proves that the hydrocarbons are more useful to indicate the concealed mine than the traditional pathfinder elements.





 

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Material-extrusion three-dimensional (3D) printing has recently attracted much interest because of its process flexibility, rapid response to design alterations, and ability to create structures “on-the-go”. For this reason, 3D printing has possible applications in rapid creation of space-based devices, for example cube satellites (CubeSat). The polycarbonate–tungsten polymer composite, which is designed for x-ray radiation-shielding applications, had intentionally utilizes low loading levels to provide x-ray shielding while limiting effects on other properties of the material, for example weight, electromagnetic functionality and mechanical strength.

The fabrication process, from tungsten functionalism to filament extrusion and material characterization, is described, including printability, determination of x-ray attenuation, tensile strength, impact resistance, and gigahertz permittivity, and failure analysis. The proposed materials are uniquely advantageous when implemented in 3D printed structures, because even a small volume fraction of tungsten has been shown to substantially alter the properties of the resulting composite.

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Due to tungsten polymer has high density, excellent radiation attenuation properties, and environmental friendly, it is widely used to produce tungsten polymer radiation shielding. Producing tungsten polymer materials, these green training projectiles are exclusively designed for close-quarters combat and training ranges. Additionally, these projectiles are completely frangible, powdering upon impact, thus eliminating any ricochet risk to the users.

High-density metals such as tungsten are embedded into tungsten polymer, which is a polymeric matrix with regulated density and physical properties, as required by the projectile technology. These thermoplastics are produced in a highly regulated injection molding process resulting in projectiles of various calibers including 40 Cal, 9mm, 5.56mm and 40mm door breaching rounds. These rounds not only improve safety, but also eliminate any lead contamination concerns at firing ranges. The frangible projectiles of tungsten polymer also adhere to the most stringent tolerances for repeatable performance with the utmost reliability and optimized performance.

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Phosphotungstic acid hydrate is a colorless, off-white powdery solid or pale yellow fine crystal. Its physical properties are as follows: chemical formula: H3O4OPW12.XH2O, molecular weight: 2880.05, Solubility: soluble in alcohol, ether and water, and related systems registry number: CAS: 12501-23-4, EINECS: 235-087-6. Because H3O4OPW12.XH2O absorbs moisture easily, so it should be sealed storage in a cool, dry place. In addition, phosphotungstic acid hydrate has slight weathering, but also it has acidic and redox properties, so it is a versatile new catalyst.
Phosphotungstic acid hydrate usually  used as a catalyst, biochemical reagents and chromatography reagents, biological staining and a variety of alkaloids, a nitrogenous base, phenol, protein, peptone, amino acids, uric acid, urea, blood and carbohydrate reagents. H3O4OPW12.XH2O as a catalyst to get the attention of people mainly that it should have a high catalytic activity, good stability, can be used for homogeneous and heterogeneous reactions, and even can be used as a phase transfer catalyst. What’s more, it is pollution-free and green catalyst.

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Sodium tungstate dihydrate is a colorless orthorhombic plate crystal. Its physical properties are as follows: chemical formula: H4Na2O6W, molecular weight: 329.8477, melting point: 698 ℃, relative density: 3.25 Solubility: soluble in water, was slightly alkaline, slightly soluble in ammonia, insoluble in ethanol. Its chemical properties are as follows: H4Na2O6W stable in air, but heated to 100 ℃ loss crystal water into anhydrous substance, when contact with strong acid will decompose into water-insoluble acid, and in dry air will be weathered.
Sodium tungstate dihydrate is mainly used in manufacture metal tungsten, tungsten acid, tungstate, dyes, inks and catalysts.
Synthesis sodium tungstate dihydrate processes are as follows:
1. The tungsten ores by alkaline hydrolysis to crush the wolframite within 320 mesh, adding together with the 30% caustic soda to reactor to operate alkaline hydrolysis.
2. After alkaline hydrolysis, the mixture reacts with calcium chloride. Calcium tungstate and calcium tungstate react to obtain tungstic acid.
3. tungstic acid reaction with caustic soda to produce sodium tungstate and after evaporation and crystallization, centrifugal dewatering, drying to obtain sodium tungstate dihydrate.

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As for the main national related brands, YK02 and YK10 own the hardness of 90.1and 88.8. They are mainly used for medium and small size carbide ball tooth for inlay system cone drill and impact drill, drilling in soft and hard rock, but it can also be used for other drilling alloy sheet; YK20.1 and YRK10 own the hardness of 88.8 and 88.5. They are mainly not only used as an alloy ball tooth for inlay system cone drill and impact drill column gear, medium-hard and hard rock drilling, but can also be used for other drilling alloy sheet; YG11C and YK50 own the hardness of 87.9 and 85. They are mainly used as an alloy ball tooth for inlay system cone drill and impact drill column gear, medium-hard and hard rock drilling, but can also be used for other drilling alloy sheet.

YG4C’s hardness is 90 and Mainly used for cutting soft and hard materials in the impact drill.

YG6’s hardness is 90.5 and is used as an electric drill, coal cutter, blade oil cone bit and button bits. YG8’s hardness is 89.5 and is used as a core drill, electric drill coal, coal cutter, drill and blade oil cone ball tooth bit. YG8C’s hardness is 88.5 and is mainly used for medium and small percussion drill bit of ball gear, and a rotation exploration drill pad.  YG11C’s hardness is 86.5 and is most used percussion drill bit and drill bit cutters for cutting high hardness of the material sphere teeth. YG13C’s hardness is 86.5 and is    Mainly used in rotary percussion drill bit for cutting high hardness of the material sphere teeth. YG15C’s hardness is 85.5 and is most used oil cone drill in hard rock and soft cut of the cutting tool.


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The main products of tungsten carbide button mainly contain dig way teeth, conical teeth, tooth edge wedge, flat tooth, wedge-shaped teeth, spherical tooth, spoon-shaped teeth, tooth mushrooms.

Carbide is the best material in tungsten carbide button widely applied in the production of high pressure DTH drilling industry.

Tungsten carbide button is widely used in petroleum drilling and snow removal equipment-snow plow. In addition, in the cutting tool tooth carbide ball and mining machinery, road maintenance and coal drilling tool, tungsten carbide button also has good application. Carbide button mining gear is mainly used as quarrying, mining and civil construction of tunnels and mining tools in the mine. Tungsten carbide button has its own unique performance. Therefor,it is widely used in petroleum drilling and snow removal, snow plow machines and other equipment. In the meantime, tungsten carbide button is also applied wildly for drilling, mining machinery, tools, and road sweeping snow removal and road maintenance tools. Tools quarrying, mining, tunnel engineering use, and civil construction.

Depending on the oil drilling machinery, such as cone bit, DTH drill, geological drilling tools, carbide button are divided into different standard styles: P-type flat-top position, Z-type coins ball position, X-type wedge position. Stability and high technology to ensure the high quality of our products, hard alloy ball tooth drilling tools are often used as Shearer, mining machinery tools and road maintenance tools for snow removal and road cleaning. Carbide ball mining gear also is widely used as a digging tool quarrying, mining, tunneling has civil buildings. In addition, as a drill accessories for heavy duty drills or deep hole drill tool accessories.

Tungsten carbide button with excellent wear resistance and toughness, compared with similar products with higher speed boring. Carbide button drill head series passivation long life cycle, which do not wear life is about the same diameter drill bit grinding times titles edge life of 5-6 times, will help save the auxiliary work, reduce workers' physical and speed up the pace.


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