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Method for manufacturing sponge cadmium under effect of micro currents

A micro-current, sponge cadmium technology, applied in the direction of cells, etc., can solve the problems of large consumption of zinc powder, low product purity and high cost

Active Publication Date: 2014-07-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a cadmium sponge with simple operation, low cost, and low-purity products for the problems of large zinc powder consumption, high raw material requirements, long process, high cost and low product purity in the traditional zinc powder replacement process for cadmium extraction. Method for preparing dendritic sponge cadmium with dendritic microstructure under the action of microcurrent with high purity of cadmium and easy industrialization

Method used

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  • Method for manufacturing sponge cadmium under effect of micro currents
  • Method for manufacturing sponge cadmium under effect of micro currents
  • Method for manufacturing sponge cadmium under effect of micro currents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Sponge cadmium heap leaching oxidation solution is used as raw material, and its elemental composition is shown in Table 2.

[0057] Table 1 The content of main elements in cadmium sponge heap leaching solution (unit: g / L)

[0058]

[0059] The pH of the reaction stock solution is 0.5; the size of the cathode is: 100mm×50mm; the size of the anode is: 100mm×50mm.

[0060] (1) Preparation before loading the tank: ①Weigh the cathode and anode plates first to obtain the composition content of the zinc plate; ②Measure the volume of the initial electrolyte volume, and take samples to analyze the Zn and Cd contents;

[0061] (2) Set the center distance between cathode and anode to be 3cm, one piece of cathode titanium mesh, the mesh aperture is 5mm, one piece of anode zinc plate is installed in the tank, the positive pole of the power supply is connected to the anode, and the negative pole is connected to the cathode;

[0062] (3) According to the current density of 50A / m ...

Embodiment 2

[0069] Sponge cadmium heap leaching oxidation solution is used as raw material, and its elemental composition is the same as Table 2.

[0070] Adjust the pH of the reaction stock solution to 1; the size of the cathode is: 80mm×50mm; the size of the anode is: 100mm×50mm.

[0071] (1) Preparation before loading the tank: ①Weigh the cathode and anode plates first to obtain the composition content of the zinc plate; ②Measure the volume of the initial electrolyte volume, and take samples to analyze the Zn and Cd contents;

[0072] (2) Set the center distance between cathode and anode as 5cm, one piece of cathode titanium plate, one piece of anode zinc plate in the tank, the positive pole of the power supply is connected to the anode, and the negative pole is connected to the cathode;

[0073] (3) According to the current density of 50A / m 2 The calculated current is 0.9A, the temperature of the electrolytic stock solution is 25°C, and the reaction time is 2 hours;

[0074] (4) Aft...

Embodiment 3

[0079] The leaching solution of copper cadmium slag is used as raw material, and its elemental composition is shown in Table 2.

[0080] Table 2 Elemental composition of copper cadmium slag leaching solution (unit: g / L)

[0081]

[0082] The pH of the reaction stock solution is 3; the size of the cathode is: 180mm×70mm; the size of the anode is: 180mm×80mm.

[0083] (1) Preparation before loading the tank: ①Weigh the cathode and anode plates first to obtain the composition content of the zinc plate; ②Measure the volume of the initial electrolyte volume, and take samples to analyze the Zn and Cd contents;

[0084] (2) Set the center distance between cathode and anode to be 9cm, 3 pieces of cathode aluminum mesh are connected in parallel, the mesh aperture is 15mm, and 4 pieces of anode zinc plates are connected in parallel to install the tank;

[0085] (3) According to the current density of 80A / m 2 The calculated current is 6.9A, the temperature of the electrolytic stock ...

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Abstract

Disclosed is a method for manufacturing sponge cadmium under the effect of micro currents. The method specifically comprises the steps that a zinc plate or a zinc sheet is used as the anode, a titanium mesh or a titanium plate or an aluminum mesh or an aluminum plate or a copper mesh or a copper plate is used as the cathode, a solution containing 10-100g / L of cadmium and over 30g / L of zinc is used as a reaction stock solution, zinc plate replacement is conducted under the effect of the micro currents with the current density being 20-80A / m<2>, and the branch-shaped sponge cadmium is obtained. In the sponge cadmium manufactured through the method, the purity of cadmium is high and the impurity content is low. The zinc plate in the method is obtained in the zinc smelting electro-deposition process, the residual reacted solution can be directly returned to the zinc electro-deposition process, and raw material cyclic utilization in the whole technological process is realized. The method for manufacturing the sponge cadmium under the effect of the micro currents is simple in technological operation and equipment, reduces the cost, is tightly combined with an existing zinc smelting process, and enables industrial production to be realized easily.

Description

technical field [0001] The invention relates to a method for preparing sponge cadmium under the action of microcurrent, belonging to the field of nonferrous metal metallurgy. Background technique [0002] Cadmium is a heavy non-ferrous metal, soft, ductile, and easily oxidized on the surface. It is widely used in cadmium plating, manufacturing alloys, pigments, plastic stabilizers, batteries, etc. 90% of cadmium-containing raw materials come from lead-zinc smelting, and sometimes metal cadmium is extracted from waste nickel-cadmium batteries. At present, the production methods for extracting cadmium include zinc powder replacement, ammonia extraction of cadmium, extraction and separation of cadmium leachate, electrowinning, etc. The most widely used process is zinc powder replacement, that is, the activity of zinc is greater than that of cadmium, and the added zinc powder is dissolved into the liquid phase as the anode of the micro-battery, and the replacement occurs in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02C25C7/00
Inventor 何静王夏阳叶龙刚张家玮戚春萍段良洪杨建广唐朝波杨声海陈永明
Owner CENT SOUTH UNIV
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