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A method and device for producing ammonium metatungstate from tungsten-containing waste materials

A technology of ammonium metatungstate and tungsten waste, which is applied in the direction of chemical instruments and methods, preparation of tungsten compounds, tungsten compounds, etc. It can solve the problems of limited cobalt content of raw materials, roasting equipment, low recovery rate, etc., and achieve tungsten recovery The effect of high efficiency, improved production efficiency, and great promotion significance

Active Publication Date: 2020-12-22
XIAMEN TUNGSTEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method and device for producing ammonium metatungstate from tungsten-containing waste in order to overcome the limitations of the existing tungsten-containing waste recycling technology on the cobalt content of raw materials, the problems of sintering equipment and low recovery rate.

Method used

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  • A method and device for producing ammonium metatungstate from tungsten-containing waste materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The steps to produce ammonium metatungstate from tungsten-containing waste are as follows:

[0051] Step 1: Take 20g of tungsten-containing waste, add calcium carbonate, Ca / WO 3 The ratio of the amount of substance is 1.5, mix uniformly, obtain compound;

[0052] Step 2: The mixture is roasted at a roasting temperature of 750°C for a roasting time of 4 hours to obtain a roasted material;

[0053] Step 3: Add hydrochloric acid to the roasting material to react, and the addition ratio is [H + ] / WO 3 The ratio of the amount of substances is 3, the reaction temperature is 95°C, and the reaction time is 3h, to obtain a solid-liquid mixture;

[0054] Step 4: Filtrate the solid-liquid mixture, and wash the filter residue three times with heated anhydrous brine to obtain a cobalt-nickel-containing solution and filter residue tungstic acid; tungstic acid is added to ammonia water after drying, wherein the initial ammonia concentration is 150g / l, at 90°C React in a water bath...

Embodiment 2

[0057] The steps to produce ammonium metatungstate from tungsten-containing waste are as follows:

[0058] Step 1: Take 30g of tungsten-containing waste, add calcium hydroxide, Ca / WO 3 The ratio of the amount of substance is 1.8, mix uniformly, obtain compound;

[0059] Step 2: roasting the mixture, the roasting temperature is 800°C, and the roasting time is 3 hours, to obtain the roasted material;

[0060] Step 3: Add hydrochloric acid to the roasting material to react, and the addition ratio is [H + ] / WO 3 The ratio of the amount of substances is 2.5, the reaction temperature is 95°C, and the reaction time is 3h, to obtain a solid-liquid mixture;

[0061] Step 4: Filtrate the solid-liquid mixture, and wash the filter residue three times with heated anhydrous brine to obtain a cobalt-nickel-containing solution and filter residue tungstic acid; tungstic acid is added to ammonia water after drying, wherein the initial ammonia concentration is 150g / l, at 90°C React in a wate...

Embodiment 3

[0064] The steps to produce ammonium metatungstate from tungsten-containing waste are as follows:

[0065] Step 1: Take 50g of tungsten-containing waste, add calcium oxide, Ca / WO 3 The ratio of the amount of the substance is 2, mix uniformly, obtain the mixture;

[0066] Step 2: The mixture is roasted at a roasting temperature of 780° C. for a roasting time of 4 hours to obtain a roasted material;

[0067] Step 3: Add hydrochloric acid to the roasting material to react, and the addition ratio is [H + ] / WO 3 The ratio of the amount of substances is 3, the reaction temperature is 95°C, and the reaction time is 3h, to obtain a solid-liquid mixture;

[0068] Step 4: Filtrate the solid-liquid mixture, and wash the filter residue three times with heated anhydrous brine to obtain a solution containing cobalt and nickel and tungstic acid from the filter residue; after drying, tungstic acid is added to ammonia water, where the initial ammonia concentration is 160g / l, at 90°C React ...

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Abstract

The invention relates to a method for producing ammonium metatungstate by a wolfram-containing waste and a device thereof. The method comprises the following steps: mixing the wolfram-containing wasteand an additive 1 to obtain a mixture; roasting the mixture, to obtain a roasted material; adding an additive 2 into the roasted material and reacting, to obtain a solid-liquid mixture; filtering thesolid-liquid mixture to obtain a filter residue and filtrate, adding the filter residue into ammonia water, performing extraction or ion exchange on an obtained ammonium tungstate solution, and evaporating and crystallizing an obtained ammonium metatungstate solution, to obtain the ammonium metatungstate. The method for producing the ammonium metatungstate by the wolfram-containing waste is suitable for recovering treatment of multiple wolfram-containing wastes, such as a floor material, a dust collecting material, a grinding material and a waste material generated in a hard alloy productionprocess, and a floor material, a dust collecting material and a waste material generated in production processes of wolfram carbide powder and tungsten powder; general material mixing devices and roasting devices are used, clotted slag is avoided, a tungsten recovery rate is high, and the method has great popularization significance.

Description

technical field [0001] The invention relates to the recycling technology of secondary tungsten resources, in particular to a method and a device for producing ammonium metatungstate from waste materials containing tungsten. Background technique [0002] Tungsten is an important strategic resource, known as "industrial teeth". With the increasing mining of tungsten ore, the reserves of tungsten ore resources are shrinking day by day, and the recovery of tungsten secondary resources is particularly important. However, due to the complex and diverse components of tungsten waste, it is difficult to determine the existence state of tungsten, and it is difficult to deal with it. The methods for recycling tungsten waste in the prior art include "zinc melting method", "saltpeter smelting method" and "roasting alkali leaching method". [0003] There are various defects in the prior art, as the zinc melting method is based on the bonding phase metal (cobalt, nickel) in the zinc and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00
CPCC01G41/00C01G41/003
Inventor 王世良黄建华胡庆民王存锦
Owner XIAMEN TUNGSTEN
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