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Method for comprehensively recovering cobalt and nickel from tungsten extraction waste materials

A technology for tungsten waste and cobalt-nickel is applied in the field of comprehensive recovery of cobalt and nickel from tungsten extraction waste, which can solve the problems of high cost, low leaching rate, large acid consumption, etc. The effect of reducing equipment and production costs

Inactive Publication Date: 2019-09-20
湖北绿钨资源循环有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above problems, the purpose of the present invention is to provide a method for comprehensively recovering cobalt and nickel from tungsten extraction waste, aiming to solve the problems of low leaching rate, large acid consumption and high cost in the existing acid leaching process

Method used

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  • Method for comprehensively recovering cobalt and nickel from tungsten extraction waste materials

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Effect test

Embodiment 1

[0036] 1. After drying the tungsten extraction waste, use a jaw crusher to crush it, and then pass it through a ball mill to prepare a sample and sieve it, so that at least 80 wt% of it has a particle size of less than 100 mesh. The tungsten extraction waste sample was obtained by multi-point random sampling method, and the content of each element in it was analyzed and tested. In terms of mass percentage, the test results were: Co 29.55%, Ni 14.50%, Fe9.86%, S 9.98%, Si 12.41%, W 2.11%, P 0.78%, Al 1.72%, Ti 3.79%, Ca 0.71%.

[0037] 2. Take 500g of tungsten extraction waste, and fully mix 80g of coke (16% of material weight), 10g of silicon dioxide (2% of material weight) and 170g of quicklime (34% of material weight) with the waste, that is, control the binary mixture Alkalinity is about 1.1 to 1.2. Put the mixture into a corundum crucible, place it in a high-temperature muffle furnace, start the heating program to raise the temperature from room temperature to 1400°C, and...

Embodiment 2

[0041] 1. After drying the tungsten extraction waste, use a jaw crusher to crush it, and then pass it through a ball mill to prepare a sample and sieve it, so that at least 80 wt% of it has a particle size of less than 100 mesh. The tungsten extraction waste sample was obtained by multi-point random sampling method, and the content of each element in it was analyzed and tested. In terms of mass percentage, the test results were: Co 29.55%, Ni 14.50%, Fe9.86%, S 9.98%, Si 12.41%, W 2.11%, P 0.78%, Al 1.72%, Ti 3.79%, Ca 0.71%.

[0042] 2. Take 500g of tungsten extraction waste, and fully mix 60g of coke (12% of material weight), 20g of silicon dioxide (4% of material weight) and 180g of quicklime (36% of material weight) with the waste, that is, control the binary mixture Alkalinity is about 1.1 to 1.2. Put the mixture into a corundum crucible, place it in a high-temperature muffle furnace, start the heating program to raise the temperature from room temperature to 1350°C, and...

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Abstract

The invention discloses a method for comprehensively recovering cobalt and nickel from tungsten extraction waste materials. The method adopts a reduction smelting process, oxides such as cobalt, nickel and iron in the waste are restored by utilizing a carbonaceous reducing agent to generate iron-cobalt-nickel alloy, and a slagging agent is added at a high temperature, so that the separation of a slag phase and an alloy phase is realized, the cobalt and the nickel in waste are enriched in the alloy phase in the lower layer of a smelting product, the dilute sulfuric acid with low acidity is used for dissolving the alloy phase under normal pressure, the cobalt is effectively improved, the nickel leaching rate and the recovery rate are reduced, the acid consumption and the energy consumption are reduced, the process route is simplified, the equipment and the production cost are reduced, the cobalt-containing and nickel-containing solutions obtained by dissolving sulfuric acid are easily subjected to subsequent purification and separation processes to prepare the cobalt and nickel products, and the obtained leached slag contains less toxic elements such as tungsten, cobalt, nickel and the like, can be used as general solid waste landfill treatment and is small in environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of comprehensive recovery and utilization of industrial waste resources, and relates to a technology for the recycling of secondary tungsten resources, in particular to a method for comprehensive recovery of cobalt and nickel from tungsten extraction waste. Background technique [0002] Although my country's tungsten resource reserves rank first in the world, the import and export volume of domestic tungsten resources has been far greater than the import volume in recent years. Under the continuous development of this large consumption, high output and excessive export situation, the advantages of my country's tungsten resources will no longer exist. Under the severe situation that my country's tungsten resources are currently facing, the secondary tungsten resource recycling industry has developed rapidly in my country. Waste cemented carbide and its grinding materials are common tungsten-containing wastes....

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B5/10C22B1/00C22B23/02C22B23/00
CPCC22B1/005C22B5/10C22B7/001C22B7/007C22B23/023C22B23/043Y02P10/20
Inventor 蒋振康杜柯冯浩万国标陈星题
Owner 湖北绿钨资源循环有限公司