Method and device for producing APT with tungsten-contained wastes

A technology for tungsten waste and equipment, applied in the field of APT production from tungsten-containing waste, can solve the problems of limited cobalt content of raw materials, sintering equipment, and low recovery rate, and achieve high tungsten recovery rate, improve production efficiency, and promote the significance Effect

Active Publication Date: 2018-12-11
XIAMEN TUNGSTEN +1
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  • 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 APT from tungsten-containing waste in order to overcome the limitations of the existing tungsten-containing waste recycling technology on the cobalt content of the raw material, the problems of sintering equipment and low recovery rate.

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  • Method and device for producing APT with tungsten-contained wastes

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Effect test

Embodiment 1

[0047] To produce APT from tungsten-containing waste, the steps are as follows:

[0048] 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;

[0049] 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;

[0050] 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;

[0051] 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, and when the res...

Embodiment 2

[0054] To produce APT from tungsten-containing waste, the steps are as follows:

[0055] 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;

[0056] Step 2: roasting the mixture, the roasting temperature is 800°C, and the roasting time is 3 hours, to obtain the roasted material;

[0057] 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;

[0058] 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, and when t...

Embodiment 3

[0061] To produce APT from tungsten-containing waste, the steps are as follows:

[0062] 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;

[0063] 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;

[0064] 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;

[0065] 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 in a water bath, a...

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Abstract

The invention relates to a method and a device for producing APT with tungsten-contained wastes. The method comprises the following steps of mixing the tungsten-contained wastes with an additive 1 toobtain a mixture; roasting the mixture to obtain a roasted material; adding an additive 2 in the roasted material for reaction to obtain a solid-liquid mixture; filtering the solid-liquid mixture to obtain filter residues and a filtrate, wherein adding the filter residues in ammonia water, and performing evaporative crystallization on an obtain ammonium tungstate solution to obtain ammonium paratungstate APT. The method for producing the APT with the tungsten-contained wastes is suitable for recovery treatment of various tungsten-contained wastes, such as flooring materials, dust collection materials, grinding materials and wastes in the production process of hard alloy as well as flooring materials, dust collection materials and wastes in the production process of tungsten carbide powderand tungsten powder, adopts universal mixing equipment and roasting equipment without clotted slag of the equipment, is high in tungsten recovery rate and has a very large popularization significance.

Description

technical field [0001] The invention relates to the recycling technology of tungsten secondary resources, in particular to a method and a device for producing APT 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 the hard alloy can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
CPCC01G41/00C01P2006/80
Inventor 王世良黄建华胡庆民王存锦
Owner XIAMEN TUNGSTEN
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