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Tungsten-containing waste treating method and device thereof

A treatment method and technology for tungsten waste, applied in the field of recycling and utilization of tungsten-containing waste resources, can solve the problems of strong raw material restrictions, low recovery rate, air pollution, etc., and achieve good raw material adaptability, high recovery rate, and strong applicability Effect

Active Publication Date: 2018-12-18
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 treatment method and equipment for tungsten-containing waste in order to overcome the problems of air pollution, strong raw material restrictions, low recovery rate and long process in the existing tungsten waste treatment technology

Method used

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  • Tungsten-containing waste treating method and device thereof

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Experimental program
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Effect test

Embodiment 1

[0043] The tungsten-containing waste is added to the granulation equipment for granulation, and the particle size of the granular tungsten-containing waste is 5cm; 300Kg of the granular tungsten-containing waste obtained after granulation is sent to the roasting equipment, the roasting temperature is 600 ℃, and the roasting time is 4h. Roasting material; add 15Kg of sodium carbonate, 100Kg of flake soda, and 30Kg of sodium percarbonate to the calcined material while it is still hot, and use the residual temperature of roasting to continue the reaction time for 2h to form a sodium tungstate-containing melt; pour the sodium tungstate-containing melt into Into the water immersion tank, the water immersion time is 0.5h, and the sodium tungstate solution and the cobalt-nickel slag are obtained. The recovery rate of tungsten is 98.0%.

Embodiment 2

[0045] The tungsten-containing waste is added to the granulation equipment for granulation, and the particle size of the granular tungsten-containing waste is 3 cm; 400Kg of the granular tungsten-containing waste obtained after granulation is sent to the roasting equipment, the roasting temperature is 800 ℃, and the roasting time is 3h. Roasting material; add 32Kg of sodium carbonate, 120Kg of caustic soda, and 45Kg of sodium percarbonate to the calcined material while it is still hot, and use the residual temperature of roasting to continue the reaction time for 3h to form a sodium tungstate-containing melt; pour the sodium tungstate-containing melt into Into the water immersion tank, the water immersion time is 0.5h, and the sodium tungstate solution and the cobalt-nickel slag are obtained. The recovery rate of tungsten is 97.5%.

Embodiment 3

[0047] The tungsten-containing waste is added to the granulation equipment for granulation, and the particle size of the granular tungsten-containing waste is 10cm; 250Kg of the granular tungsten-containing waste obtained after granulation is sent to the roasting equipment, the roasting temperature is 550 ° C, and the roasting time is 3h. Roasting material; add 18Kg of sodium carbonate, 75Kg of flake soda, and 12.5Kg of sodium percarbonate to the calcined material while it is still hot, and use the residual temperature of roasting to continue the reaction time for 1h to form a melt containing sodium tungstate; Pour it into a water immersion tank for 1 hour to obtain sodium tungstate solution and cobalt-nickel slag. The recovery rate of tungsten is 97.6%.

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Abstract

The invention relates to a tungsten-containing waste treating method and device thereof. The method comprises the following steps: pelletizing tungsten-containing wastes to obtain granular tungsten-containing wastes; roasting the granular tungsten-containing wastes obtained in step 1 to obtain a roasted material; adding an additive into the hot roasted material obtained in step 2; and reacting through the afterheat after roasting to obtain a melt; and dipping the melt obtained in step 3 into water to obtain a solution and a solid. The device comprises a pelletizing device, a roasting device, adust collecting device, a water dipping tank, a conveying pump, a solid-liquid separation device, a concentrating device, a drying device and a packing device. The method is short in process and highin recovering rate; special limitation to the content of impurity elements in the tungsten-containing wastes is avoided; the raw material adaptability is high; and the method is a green and environmentally-friendly treatment method.

Description

technical field [0001] The invention relates to a resource recycling technology for tungsten-containing wastes, in particular to a processing method and equipment for tungsten-containing wastes. Background technique [0002] Tungsten is an important strategic resource and is known as "industrial teeth". With the increasing mining of tungsten ore, the resource reserves of tungsten ore are shrinking day by day, and the recovery of tungsten secondary resources is particularly important. However, due to the complex and diverse composition of tungsten waste, it is difficult to process. Commonly used recovery methods in the industry include "salt smelting method", "zinc melting method" and "oxidative roasting alkali leaching method". [0003] The saltpeter smelting method mainly uses saltpeter as an oxidant to oxidize tungsten in tungsten waste at high temperature and react to produce sodium tungstate. After the sodium tungstate frit is immersed in water, the impurity elements a...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/02C22B7/00C22B34/36
CPCC22B1/02C22B1/24C22B7/006C22B34/36Y02P10/20
Inventor 王世良黄建华胡庆民王存锦
Owner XIAMEN TUNGSTEN
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