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Complex alloy used for anode plate for refining metallic copper by electrolysis and preparation method thereof

A multi-element alloy and anode plate technology, applied in the field of materials, can solve the problems of lead-calcium-tin alloy anode substrate corrosion, complex processing technology, and increased lead pollution, so as to reduce the consumption of aluminum materials, simplify the process flow, and slow down the corrosion rate. Effect

Inactive Publication Date: 2010-03-03
苏向东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead-calcium-tin alloys also have the following problems: First, the anode will evolve a large amount of oxygen during the electrolysis process. On the one hand, the precipitated oxygen can be gathered into oxygen and released; on the other hand, it may also diffuse from the surface to the inside, so that the lead Calcium-tin alloy anode substrate suffers from corrosion
Second, in order to reduce the loss of calcium in the alloy smelting process, a certain amount of aluminum needs to be added as a protective agent for calcium at high temperature (680-720°C). High temperature increases the vapor pressure of lead, resulting in increased lead pollution and increased energy consumption. It also complicates the processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 3 kg of No. 1 tin and 0.8 kg of cobalt, place them in a resistance furnace and heat them to 410°C to melt them, and then add charcoal powder to cover them. A 3.8 kg master alloy ingot;

[0017] Weigh 994.3 kg of No. 1 electrolytic lead, 3.8 kg of tin-cobalt intermediate alloy ingot, 1 kg of calcium, and 0.9 kg of No. 45 mixed rare earth metal; first heat the lead melting furnace to 480 ° C to melt the lead ingot and tin-cobalt intermediate alloy, and then keep it warm; Put all the calcium and No. 45 mixed rare earth metals into a feeding device, add them to the lead liquid at one time and stir, and at the same time apply a 16V DC potential difference between the melt and the furnace; wait for the melt to be alloyed evenly and then stand still for 60 minutes After removing the oxide slag on the surface of the melt, the anode slab is cast; finally, the anode slab obtained by casting is cold-rolled and cut into an anode plate of 835×710×6mm. The detected composition...

Embodiment 2

[0020] Weigh 30 kg of No. 1 tin and 0.05 kg of cobalt, place them in a resistance furnace and heat them to 450°C to melt them, and then add charcoal powder to cover them. A 30.05 kg master alloy ingot;

[0021] Weigh 969.35 kg of No. 1 electrolytic lead, 30.05 kg of tin-cobalt intermediate alloy ingot, 0.3 kg of strontium, and 0.3 kg of No. 45 mixed rare earth metal; first heat the lead-melting furnace to 490 ° C to melt the lead ingot, tin-cobalt intermediate alloy, and keep it warm; Put all the strontium and No. 45 mixed rare earth metals into a feeding device, add them to the lead liquid at one time and stir, and at the same time, apply a 36 volt DC potential difference between the melt and the furnace; wait for the melt to alloy evenly and stand still for 45 minutes After removing the oxide slag on the surface of the melt, the anode slab is cast; finally, the anode slab obtained by casting is cold-rolled and cut into an anode plate of 1220×920×6mm. The detected compositio...

Embodiment 3

[0024] Weigh 15 kg of No. 1 tin and 0.1 kg of cobalt, place them in a resistance furnace and heat them to 400°C to melt them, and then add charcoal powder to cover them. 15.1 kg master alloy ingot;

[0025] Weigh 983.9 kilograms of No. 1 electrolytic lead, 15.1 kilograms of tin-cobalt master alloy ingots, 0.5 kilograms of calcium, and 0.5 kilograms of No. 40 mixed rare earth metals; first, the lead melting furnace is heated up to 550 ° C to melt lead ingots and tin-cobalt master alloys, and keep them warm; Put all the calcium and No. 40 mixed rare earth metal into a feeding device, add it to the lead liquid at one time and stir, and at the same time, apply a 5V DC potential difference between the melt and the furnace; wait for the melt to alloy evenly and stand still for 30 minutes After removing the oxide slag on the surface of the melt, the anode slab is cast; finally, the anode slab obtained by casting is cold-rolled and cut into an anode plate of 995×960×6mm. The detected...

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Abstract

The invention discloses a complex alloy used for an anode plate for refining metallic copper by electrolysis and a preparation method thereof. The complex alloy consists of the following components byweight percent: 0.3-3% of tin, 0.03-0.1% of calcium or strontium, 0.005-0.08% of cobalt, 0.03-0.09% of rare earth metal and the balance of lead. The preparation method comprises the steps of: smelting and preparing tin and cobalt into preliminary alloy of tin and cobalt in a melting furnace according to weight percent for standby; putting the lead and the preliminary alloy of tin and cobalt intothe melting furnace for melting, and preserving heat after the temperature is raised to be 450-550 DEG C; adding the calcium or the strontium, and the rare earth metal into the lead liquid according to the weight percent and stirring, and applying a 5-36 V direct current potential difference between the fusant and the furnace during the stirring process; and standing for 30-40 minutes after the fusant is alloyed evenly, and removing oxidizing slag on the surface of the fusant, thus obtaining the complex alloy. The invention simplifies the process flow, reduces material consumption, improves corrosion resistance, and simultaneously reduces melting temperature and metallic lead pollution.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a multi-element alloy for an anode plate for electrolytic extraction of metallic copper, and also to a preparation method thereof. Background technique [0002] In the wet electrowinning copper industry, lead-tin-calcium alloys (tin: 0.6%; calcium 0.1%; aluminum 0.05%; balance lead) have been used to make anodes for nearly twenty years. The characteristic of this alloy is that the calcium element in the alloy component effectively improves the strength of the lead alloy, and tin not only contributes to the strength of the alloy, but also improves the conductivity of the oxide film on the surface of the alloy anode to a greater extent under the anode potential. The combination of calcium and tin makes the lead-calcium-tin alloy anode not only have good mechanical properties, but also have a long service life. However, lead-calcium-tin alloys also have the following problems: fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/06C22C1/03C25C1/12C25C7/02
CPCY02P10/20
Inventor 苏向东
Owner 苏向东
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