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Composite anode for electrolytic manganese and preparation method of composite anode

A composite anode, electrolytic manganese technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve problems such as a large number of anode slimes, and achieve the effects of reducing corrosion rate, curbing edge effects, and reducing power consumption

Inactive Publication Date: 2018-08-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a composite anode for electrolytic manganese and its preparation method, aiming to solve the problem that the lead-silver alloy anode used for electrolytic manganese is easy to induce MnO 2 generation, resulting in the technical problem of producing a large amount of anode slime

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The composite anode for electrolytic manganese of the present invention has the following mass percentage distribution of components: Sn: 28.3%, cobalt: 3.8%, and the rest is lead.

[0030] Specifically, the composite anode is prepared through the following steps:

[0031] 1) Preparation of tin-cobalt master alloy

[0032] Add high-purity tin powder and high-purity cobalt powder into the graphite crucible, the mass percentage of tin powder and cobalt powder is as follows: tin 80%, cobalt 20%. Stir and mix the powder at room temperature until uniform, place the graphite crucible in a vacuum induction furnace for smelting for 40 min, and the temperature of the vacuum induction furnace is 1200°C.

[0033] 2) Prepare the slab

[0034] Add molten lead into the molten pool and heat it to 300°C, add the tin-cobalt master alloy into the molten lead liquid, keep stirring for 5 minutes after the tin-cobalt master alloy melts, and discharge three quarters of the molten lead from...

Embodiment 2

[0042] The composite anode for electrolytic manganese of the present invention has the following mass percentage distribution of components: Sn: 22.3%, cobalt: 2.1%, and the rest is lead.

[0043] Specifically, the composite anode is prepared through the following steps:

[0044] 1) Preparation of tin-cobalt master alloy

[0045] Add high-purity tin powder and high-purity cobalt powder into the graphite crucible, the mass percentage of tin powder and cobalt powder is as follows: tin 85%, cobalt 15%. Stir and mix the powder at room temperature until uniform, place the graphite crucible in a vacuum induction furnace for smelting for 50 min, and the temperature of the vacuum induction furnace is 1150°C.

[0046] 2) Prepare the slab

[0047] Add molten lead into the molten pool and heat it to 320°C, add the tin-cobalt master alloy to the molten lead liquid, keep stirring for 20 minutes after the master alloy melts, discharge 70% of the melt from the bottom of the molten pool and...

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PUM

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Abstract

The invention discloses a composite anode for electrolytic manganese and a preparation method of the composite anode. The preparation method comprises the steps that a certain proportion content of tin-cobalt mother alloy is added to molten lead; a complete reaction occurs in a molten bath; bottom layer melt flows out in the first place under the effect of gravity and is gathered, and remaining melt is injected into a mold; and hot rolling treatment is conducted on a plate blank obtained through pouring, so that the composite anode is obtained, wherein the composite anode comprises, by mass percentage, 10-30% of tin, 0.1-5% of cobalt and the balance lead. The preparation process is high in continuity degree and low in cost; the prepared composite anode can generate a small amount of and even no anode mud under the conditions of the low electric current density and long time of service; the problems that anode mud is large in generation amount and difficult to recycle are solved; consumption of manganese ions and selenium dioxide is lowered; the slotting cycle of an electrolytic bath is shortened; and in addition, compared with a traditional anode, no precious metal, namely silver,is added to the composite anode, and production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a composite anode for electrolytic manganese and a preparation method thereof. Background technique [0002] So far, China has become the world's largest producer and demander of electrolytic manganese. However, the high power consumption has brought huge resource consumption; the waste residue discharged during the electrolysis process cannot be effectively treated, which has brought pollution to the environment. These two points are the main bottlenecks restricting the development of electrolytic manganese. The existing statistics show that for every ton of manganese produced, the output of anode slime is about 150kg. [0003] Lead-silver alloy anode has been widely used in the electrolytic manganese industry because of its advantages of easy forming, stability in sulfuric acid electrolyte, and low price. But MnO 2 It is very easy to grow on the surface of lead-silve...

Claims

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Application Information

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IPC IPC(8): C25C1/10C25C7/02C22C11/06C22C1/03C22F1/12
CPCC25C1/10C22C1/03C22C11/06C22F1/12C25C7/02
Inventor 蒋良兴杨凡刘芳洋赖延清李劼
Owner CENT SOUTH UNIV