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Preparation method of sodium tungstate, method of collecting tungsten, device for preparing sodium tungstate, and preparation method of sodium tungstate aqueous solution

A technology of sodium tungstate and aqueous solution, which is applied in the preparation of tungsten compounds, chemical instruments and methods, tungsten oxide/tungsten hydroxide, etc., can solve the problem of not being able to obtain high-purity sodium tungstate aqueous solution, and achieve the effect of efficient preparation

Inactive Publication Date: 2011-12-28
ALLIED MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This poses a problem that a high-purity sodium tungstate aqueous solution cannot be obtained

Method used

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  • Preparation method of sodium tungstate, method of collecting tungsten, device for preparing sodium tungstate, and preparation method of sodium tungstate aqueous solution
  • Preparation method of sodium tungstate, method of collecting tungsten, device for preparing sodium tungstate, and preparation method of sodium tungstate aqueous solution
  • Preparation method of sodium tungstate, method of collecting tungsten, device for preparing sodium tungstate, and preparation method of sodium tungstate aqueous solution

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no. 1 approach

[0061] figure 1 is a schematic configuration diagram of an apparatus for preparing sodium tungstate according to the first embodiment, which is an example of an apparatus for preparing sodium tungstate used in the present invention. figure 1 The preparation device shown in includes the tungsten-containing material supply port 1 for supplying tungsten-containing material; the tungsten-containing material input pipe 1a connected with the tungsten-containing material supply port 1; the sodium nitrate supply port 2 for supplying sodium nitrate; and The sodium nitrate input pipe 2a connected to the sodium nitrate supply port 2; the outer wall part 10 connected with the tungsten-containing material input pipe 1a and the sodium nitrate input pipe 2a; the protective container 5 arranged inside the outer wall part 10; the outer wall part 10 arranged inside the protective container 5 Heating device 6; Be arranged in the reaction container 17 of heating device 6 inside; Pass through prot...

no. 2 approach

[0157] Figure 6 is a schematic configuration diagram of an apparatus for preparing sodium tungstate according to a second embodiment, wherein the apparatus is another example of an apparatus for preparing sodium tungstate used in the present invention. Figure 6 The production apparatus shown in is characterized by points (a) to (h) described below.

[0158] (a) As for the tungsten-containing material, a storage unit 1b capable of storing, for example, hundreds of kilograms of tungsten-containing material is provided above the tungsten-containing material supply port 1 . The tungsten-containing material is automatically supplied to the tungsten-containing material input pipe 1 a (such as a quantitative supply hopper) via a supply conveyor (not shown) and a tungsten-containing material supply port 1 . Therefore, the amount of tungsten-containing material to be dissolved can be increased to increase the productivity of sodium tungstate.

[0159] (b) For example, using a flexi...

no. 3 approach

[0171] Figure 7is a schematic configuration diagram of a device for preparing sodium tungstate according to a third embodiment, wherein the device is another example of the device for preparing sodium tungstate used in the present invention. Figure 7 The production apparatus shown in is characterized by adopting the following point (i) instead of the above-mentioned point (g) in the second embodiment.

[0172] (i) The melt 9 is discharged from the holding furnace 41 into the water dissolving tank 42 by means of a tilting mechanism. In other words, for example, the holding furnace 41 (the soft waste supply mechanism and the agitator are not shown) into which the soft waste material 25 and the soft waste material (calcined powder) have been introduced is separated from the soft waste material supply mechanism and the agitator and subsequently Such as Figure 8 tilted as shown in the schematic configuration diagram. This causes the melt 9 contained in the holding furnace 41 ...

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Abstract

Provided are a method for producing sodium tungstate by supplying an oxidant (4) made of sodium nitrate or sodium nitrite to bring a tungsten containing material (3) and the oxidant (4) into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product (9); a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt (9) containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

Description

technical field [0001] The invention relates to a preparation method of sodium tungstate, a collection method of tungsten, a device for preparing sodium tungstate and a preparation method of sodium tungstate aqueous solution. Background technique [0002] The following sintered cemented carbide is excellent in hardness and wear resistance: the sintered cemented carbide contains tungsten carbide (WC) as a main component, and uses cobalt (Co), nickel (Ni) or the like as a binder metal In some cases, carbides such as titanium (Ti) and tantalum (Ta) are added to improve performance. Therefore, such sintered cemented carbide is suitable for use in sintered cemented carbide tools for metal processing. [0003] In this case, the cemented carbide tool which cannot be used anymore due to chipping or abrasion and the chipped portion of the cemented carbide tool are discarded as hard scrap. In addition, part of the cemented carbide powder produced in the process of manufacturing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
CPCC01G31/02C22B7/006B01J8/10C01G35/00C22B34/36B01J2219/0004C01G53/42C01G23/005C01G41/00C01G41/02C01G37/02B01J2219/00157B01J2219/00132C01G41/003C01G37/14C01G51/42C01P2002/72C22B7/001Y02P10/20B01J19/28Y02W30/50
Inventor 山本良治屉谷和男不动贵之中野明山中俊佑井口刚寿佐藤史淳池个谷明彦
Owner ALLIED MATERIAL
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