Tungsten

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Treatment of APT Production Wastewater 141

Treatment of APT production wastewater is a necessary process to realize resource recovery and sustainable development of water resources. The neutralization precipitation method is the main method of treating waste water in tungsten smelting currently. However, the wastewater treated by this method contains a high concentration of Cl-, which will cause secondary pollution. More details, please visit: http://ammonium-paratungstate.com/index.html Some researchers proposed to use reverse osmosis process to treat ammonium paratungstate workshop wastewater. However, for high-concentration saline wastewater, the reverse osmosis…

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A New Process For Recovering Ammonium Tungstate From APT Crystallization Mother Liquor 159

The researchers proposed a new process for recovering ammonium tungstate from APT crystallization mother liquor. This process improved the existing problems of high consumption of auxiliary materials, high production cost and large energy consumption in the prior art. More details, please visit: http://ammonium-paratungstate.com/index.html There are two main processes of recovering ammonium tungstate from APT crystallization mother liquor: scheelite precipitation technology and conversion to sodium tungstate technology. The scheelite precipitation technology has disadvantages of high consumption of auxiliary materials, high production…

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A Preparation Method of Ammonium Paratungstate Using Tungsten-contained Soft Waste Material 111

The researchers proposed a preparation method of ammonium paratungstate (APT) using tungsten-contained soft waste material. And the obtained APT can be directly used in the production of tungsten alloys or be applied as additives for chemical products. More details, please visit: http://ammonium-paratungstate.com/index.html A Preparation Method of Ammonium Paratungstate Using Tungsten-contained Soft Waste Material Put 900g of AMT leaching residue (WO3 content of 89.5%) in the reaction kettle and add 3600mL of 6wt% diluted ammonia water (molar ratio NH3: WO3=3.9), reacted…

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Preparation of Ammonium Paratungstate Using Tungsten-contained Waste Material 109

Researchers have proposed a method for producing ammonium paratungstate using tungsten-contained waste material, which has the advantages of short production process. Evaporated and crystallized waste ammonia gas and wastewater can be recycled and reused. And it significantly reduces emissions of waste gas and wastewater. Also, it improves the tungsten recovery rate. More details, please visit: http://ammonium-paratungstate.com/index.html A Method for Producing Ammonium Paratungstate Using Tungsten-contained Waste Material Step One: Acid leaching and removing impurities from tungsten-contained waste material (containing metal tungsten…

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How to Produce Ammonium Paratungstate Using Tungsten-contained Soft Waste Material? 139

How to produce ammonium paratungstate using tungsten-contained soft waste material? The researchers proposed a method for producing ammonium paratungstate using tungsten-contained soft waste material. The method has the characteristics of short process flow, low investment in equipment, high productivity and yield, low cost of recycling, and no waste liquid that pollutes the environment. More details, please visit: http://ammonium-paratungstate.com/index.html A Method for Producing Ammonium Paratungstate Using Tungsten-contained Soft Waste Material Step One: Mix tungsten-contained soft waste material with dilute ammonia water,…

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Recycling of Tungsten from APT Crystallization Mother Liquor 120

Why should tungsten in APT crystallization mother liquor be recycled? APT, or ammonium paratungstate, is an important intermediate product in the tungsten smelting process. More details, please visit: http://ammonium-paratungstate.com/index.html The classic ammonium paratungstate production process mainly includes the steps of ore decomposition, transformation to obtain crude ammonium tungstate solution, removal of impurities in crude ammonium tungstate solution, crystallization to obtain ammonium paratungstate and its crystallization mother liquor, and recycling of crystallization mother liquor. In other words, APT crystallization mother liquor…

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How to Recycle Ammonium Tungstate from Ammonium Paratungstate Crystallization Mother Liquor? 134

How to recycle ammonium tungstate from ammonium paratungstate crystallization mother liquor? The researchers proposed a process for recycling ammonium tungstate from ammonium paratungstate crystallization mother liquor. The purity of ammonium tungstate obtained by this method is high, and the production cost is effectively reduced. More details, please visit: http://ammonium-paratungstate.com/index.html A Process of Recycling Ammonium Tungstate from Ammonium Paratungstate Crystallization Mother Liquor Step One: Add 1.7kg of the theoretical amount of 300% phosphoric acid to the ammonium paratungstate crystallization mother liquor…

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How to Treat APT Production Wastewater? 112

How to treat APT production wastewater? There is a large amount of wastewater during the production process of APT (ammonium paratungstate). And the wastewater contains a large amount of magnesium sulfate, sodium sulfate and a small amount of heavy metal ions. So, it will cause serious pollution and waste of water resources if the production water is directly discharged without treatment. Then, how to treat APT production wastewater? More details, please visit: http://ammonium-paratungstate.com/index.html The researchers used the “neutralization + filtration…

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Tungsten Carbide Glass Cutter Applied for Cutting Window Glass 101

Tungsten carbide glass cutter applied for cutting window glass has the characteristics of good wear resistance, good thermal hardness (up to 900-1000 °C, maintaining 60HRC), high hardness (86-93HRA, equivalent to 69-81HRC), and its lifespan 5-80 times higher than high-speed steel. More details, please visit: http://www.tungsten-carbide.com.cn/tungsten-carbide-blade-bar.html The tungsten carbide material used in a glass cutter is sintered and formed, that is, the powder is pressed into a blank, and then heated into a sintering furnace to a certain temperature (sintering temperature),…

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Tungsten Carbide Glass Cutter Applied for Cutting Ornamental Glass 113

Tungsten carbide glass cutter has higher hardness than glass and is durable, sharp, and corrosion-resistant, so it is applied for cutting ornamental glass. In general, the hardness of glass is 6-7. It means that the hardness of the glass cutter is higher than 7. More details, please visit: http://www.tungsten-carbide.com.cn/tungsten-carbide-blade-bar.html Tungsten carbide cutting wheels have been proven to have a significantly longer life than steel cutting wheels and offer greater and more reproducible penetration in scoring as well as easier opening…

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