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Sodium Tungstate Crystal 661

Sodium tungstate crystal may be prepared by the crystallization of sodium tungstate solution. Removal of Arsenic and Silicon from Sodium Tungstate Solution by Crystallization The removal of arsenic and silicon from impure Na2WO4 solution was investigated by crystallization using the liquors (m(As)/m(WO3)=0.32×10-3~2.94×10-3, m(Si)/m(WO3)=1.26×10-3~5.84×10-3) from middle-grade mixed wolframite and scheelite concentrate decomposed with NaOH by mechanical activation and tungsten residue leached by traditional digestion. The influences of the crystallization ratio and the addition of Al2O3 on removing impurities of As and…

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Sodium Polytungstate 827

Sodium polytungstate has been found to be used as heavy-liquid to separate and concentrate materials by density with the deepening of research. For example, it can be used to separate the worn carbon composites in brake pads. Sodium polytungstate is a kind of inorganic heavy-liquid with the characteristics of high density and cyclic utilization. And it is nontoxic and easily prepared. Also, the sodium polytungstate density separation operation is simple and stable, and most importantly the physic-chemical property of matter…

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Sodium Tungstate Solution 628

Sodium tungstate solution containing high impurities should be purified. Purification of Sodium Tungstate Solution with High Impurities Sodium tungstate solution out of sodium phosphate decomposition of scheelite contains high impurities. To solve this problem, the purifying effects of fluoride (F), phosphorous (P), silicon (Si) and arsenic (As) by basic magnesium carbonate was studied. Effects of basic magnesium carbonate dosage, pH value, reaction temperature, reaction time on impurities purifying were researched. The removal mechanism of impurities was also researched. The results…

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Reagent Grade Sodium Tungstate 447

Reagent grade sodium tungstate, RG sodium tungstate for short, may be applied for precision analysis and scientific research. Reagent-grade chemical substances are labeled red. There are a variety of chemical reagents, so that it is difficult to prepare them into multiple grades or different specifications at the same time. So, it is hard to obtain reagents of the required purity or grade sometimes. And therefore, it is of significance for users to know how to purify reagents. There are many…

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Tungsten Alloy for Centrifugal Clutch 215

Tungsten alloy for centrifugal clutch is one of the most commonly used types of clutches. It transmits torque through friction to control engine speed. It has high density, high temperature, wear resistance and good performance, which can meet the engine’s high speed requirements. Characteristic Tungsten alloy for centrifugal clutch is made of high density tungsten alloy material. Its main composition is W-Ni-Cu, W-Ni-Fe or W-Ni-Cu-Fe. The tungsten content is generally 90%~97%. Tungsten alloy has high hardness and good wear resistance,…

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Tungsten Alloy Crankshaft Rod 404

Tungsten alloy crankshaft rod has small size, high quality and long service life, which is non-toxic and non-polluting. It can save time and cost and is used to balance weight in automobile engine. Characteristic Tungsten alloy crankshaft rod has a higher melting point, a lower expansion coefficient, a density of 2 times that of steel, and 50% higher than lead. It has good corrosion resistance, elongation and mechanical processing properties. Connected to the lower end of the connecting rod, the…

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Tungsten Alloy Crankshaft Brick 330

Tungsten alloy crankshaft brick has high density, good fatigue resistance, wear resistance and serviceability. It is widely used in automobile engines as balancers for automobile engines. Characteristic Tungsten alloy crankshaft brick is made of tungsten alloys and increase the crankshaft speed. Usually, some light elements such as silicon are added to the crankshaft to reduce the weight of the crankshaft. Because the tungsten alloy has good fatigue resistance, the tungsten alloy crankshaft brick will not produce metal fatigue. Applications Tungsten…

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Tungsten Alloy Crankshaft Block 367

Tungsten alloy crankshaft block has a special shape that can be used as counterweights to reduce turbulence in the crankshaft. It must be used with pistons and piston rods. In the rotation of the engine components, the gravity on each component is approximately equal, which can only be achieved by using tungsten alloy crankshaft block. Tungsten alloy crankshaft block is an important part of the engine, which can turn the piston up and down motion into a circular motion on…

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Tungsten Alloy Crankshaft Counterweight 302

Tungsten alloy crankshaft counterweight has good performance, wear resistance and processing performance, and it is non-toxic and environmentally friendly. It can be used as a counterweight for automotive engines and is widely used in automotive engines. Characteristic Tungsten alloy crankshaft counterweight is made of tungsten alloy. Tungsten alloy has high density, high melting point, high hardness, and other excellent properties, which is the best materials for counterweights. Applications At present, most automotive engine crankshafts use tungsten alloy crankshaft counterweights. Compared…

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Tungsten Alloy Crankshafts 381

Tungsten alloy crankshaft has good characteristic and wear resistance. It can simplify the entire weighting process, reduce costs. It is widely used in the engine of automobile engines and other vehicles. Characteristic Tungsten alloy crankshaft has excellent characteristics such as high hardness, high strength, high temperature resistance, wear resistance, etc. It greatly simplifies the entire counterweight process and reduces the cost. In the past, when crankshaft counterweights were used, the crankshaft weights used were not only costly, but the entire…

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