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Method for separating and recovering metal compound waste materials

A metal composite, separation and recovery technology, applied in the improvement of process efficiency, photography process, electrodes and other directions, can solve the problems of high acid consumption and environmental pollution, reduce energy consumption and acid consumption, low-cost separation, purification and recovery, improve The effect of electrolysis efficiency

Active Publication Date: 2015-04-08
温州宏丰特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before the separation and purification of metals by electrowinning, the cyclone electrowinning technology still needs to dissolve the metal waste in acid to prepare a metal salt solution, which consumes a lot of acid and causes certain environmental pollution.

Method used

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  • Method for separating and recovering metal compound waste materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Taking Separation and Recovery of Silver-Copper Composite Waste as an Example

[0029] In the first step, the silver-copper composite waste is put into the polytetrafluoroethylene anode basket covered with polyester cloth as the anode, and the stainless steel plate is used as the cathode, and the copper-containing 40-55g / L, H 2 SO 4 100~150g / L CuSO 2 +H 2 SO 4 The solution is used as the electrolyte (add 300-500ml hydrochloric acid / ton of copper, the temperature is 58-65°C), and the current density at the cathode is 160-400A / m 2 , The cell voltage is 0.7 ~ 1.0V under the condition of electrolysis.

[0030] In the second step, the electrolyte enters from the liquid inlet during the electrolysis process, and flows at a flow rate of 400-2000L / h (for example, 400L / h, 1000L / h, 2000L / h, etc.), and finally flow out through the upper liquid outlet on the other side. At the same time, 8-50kg of silver-copper composite waste is added to the anode basket every 4-16 hours. T...

Embodiment 2

[0034] Taking Separation and Recovery of Gold, Silver and Copper Composite Waste as an Example

[0035] In the first step, the gold, silver and copper composite waste is put into the polytetrafluoroethylene anode basket covered with polypropylene cloth as the anode, and the titanium plate is used as the cathode, and the silver containing 180-200g / L, HNO 354~80g / L AgNO 3 +HNO 3 The solution is used as the electrolyte, and the current density at the cathode is 200-400A / m 2 , The cell voltage is 2.2 ~ 2.5V under the condition of electrolysis.

[0036] In the second step, during the electrolysis process, the electrolyte enters from the liquid inlet, and flows at a flow rate of 200-1000L / h between the polytetrafluoroethylene liquid inlet channel covered with polypropylene cloth, between the gold, silver and copper composite waste, and between the two electrodes (such as 200L / h, 600L / h, 1000L / h, etc.), and finally flow out through the upper liquid outlet on the other side. At t...

Embodiment 3

[0040] Taking the separation and recovery of nickel-iron composite waste as an example

[0041] In the first step, the nickel-iron composite waste is put into the ABS anode basket covered with polyester cloth as the anode, the nickel plate is used as the cathode, and the nickel-containing 70-80g / L, H 2 SO 4 120~170g / L NiSO 2 +H 2 SO 4 The solution is used as the electrolyte, and the current density at the cathode is 180-400A / m 2 , The cell voltage is 1.5 ~ 1.7V under the condition of electrolysis.

[0042] In the second step, the electrolyte enters from the liquid inlet during the electrolysis process, and flows at a flow rate of 300-1500L / h (such as 300L / h, 900L / h, 1500L / h, etc.), and finally flow out through the upper liquid outlet on the other side. At the same time, 6-40kg of nickel-iron composite waste is added to the anode basket every 5-20 hours. The nickel and iron in the nickel-iron composite waste completely enter the electrolyte in the form of ions, and nicke...

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Abstract

The invention relates to a method for separating and recovering metal compound waste materials. The method comprises the following steps: putting the metal compound waste materials in an anode basket as an anode for cyclonal electrolysis to obtain metals needed to be electrolyzed and purified; and feeding an electrolyte from a liquid inlet in an electrolytic process, flowing at a certain speed among a liquid inlet channel, the metal compound waste materials and two poles, finally flowing out from a liquid outlet at the upper end, and recycling the electrolyte after certain treatment; and after certain treatment of anode mud, separating and recovering metals. The method provided by the invention can be used for achieving separation and recovery with high efficiency, zero pollution and low cost.

Description

technical field [0001] The invention relates to the separation and recovery technology of metal composite waste, in particular, a method for separating and recycling metal composite waste by using swirl electrolysis technology to realize efficient recovery and reuse of metal. Background technique [0002] At present, the recycling of metal composite waste has become the consensus of people. The existing domestic metal composite waste recycling methods mainly include pyrometallurgy, mechanical flotation, dissolution, electrowinning and traditional electrolysis. Pyrometallurgical method has serious secondary pollution, low recovery rate, and expensive treatment equipment; mechanical flotation method has expensive equipment, cumbersome process flow, and low recovery rate; dissolution method has high cost, high acid consumption, serious environmental pollution, and difficult regeneration of certain metals ; Although the traditional electrolysis method has no pollution to the env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/00C25C7/02C25C7/06
CPCC25C1/12C25C1/20C25C7/02C25C7/06Y02P10/20
Inventor 陈林驰
Owner 温州宏丰特种材料有限公司
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