Method for leaching valuable metal from cobalt-copper white alloy

A cobalt-copper white alloy and valuable metal technology, applied in the field of metallurgy, can solve the problems of high equipment material requirements, difficult industrial implementation, limited application effect, etc., achieve good leaching performance, improve alloy leaching performance, and furnace body use efficiency high effect

Active Publication Date: 2015-11-18
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, chlorine gas is a highly toxic gas, highly dangerous, highly corrosive, and has high requirements for equipment materials
[0008] From the above analysis, it can be seen that the current technology is based on the traditional non-ferrous smelting ideas, adopting measures such as smelting calcium (magnesium) silicon slag desiliconization, alloy powder fine grinding, changing leaching agent system and oxidizing agent, etc. to solve the problem of cobalt white alloy. The problems of desiliconization and cobalt / copper refractory, however, both have certain limitations, limited application effect, difficult industrial implementation, and poor economy

Method used

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  • Method for leaching valuable metal from cobalt-copper white alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a kind of like figure 1 Shown the present invention is from the method for leaching valuable metal from cobalt-copper white alloy, comprises the following steps:

[0039] (1) Put 800kg of cobalt-copper white alloy (mass content of main components are Co38.87%, Fe32.45%, Cu13.45%, Si10.15%) into 1000kg intermediate frequency electric furnace for desiliconization test, Set the melting temperature to 1475°C to melt the cobalt-copper white alloy to form an alloy melt.

[0040] (2) Add 20kg pyrolusite (Mn mass content 39.86%, SiO 2 mass content 13.33%), and at the same time feed nitrogen into the alloy melt (flow rate 10 ~ 25m 3 / h) blowing slagging (MnO-SiO 2 ), by controlling the appropriate oxygen partial pressure, the valuable metals copper, cobalt and iron in the furnace are hardly oxidized, while most of the manganese is oxidized.

[0041] (3) Separating the slagging generated in step (2) from the alloy melt.

[0042] (4) Returning the separated slag-forming melt ...

Embodiment 2

[0045] a kind of like figure 1 Shown the present invention is from the method for leaching valuable metal from cobalt-copper white alloy, comprises the following steps:

[0046] (1) Put 800kg of cobalt-copper white alloy (mass content of main components are Co25.87%, Fe40.05%, Cu15.45%, Si15.16%) into 1000kg intermediate frequency electric furnace for desiliconization and tempering test, Set the melting temperature to 1550°C to melt the cobalt-copper white alloy to form an alloy melt.

[0047] (2) Add 5.0kg metal manganese (Mn content 99%) and 12.0kg manganese dioxide powder (MnO 2 content of 95%), and at the same time, a mixed gas of air and oxygen is passed into the surface of the alloy melt (wherein the air flow rate is 12m 3 / h, oxygen flow rate 5m 3 / h,) for blowing slagging (MnO-SiO 2 ), by controlling the appropriate oxygen partial pressure, the valuable metals copper, cobalt and iron in the furnace are hardly oxidized, while most of the manganese is oxidized.

[0...

Embodiment 3

[0052] a kind of like figure 1 Shown the present invention is from the method for leaching valuable metal from cobalt-copper white alloy, comprises the following steps:

[0053] (1) Put 40kg of cobalt-copper white alloy (mass content of main components are Co33.83%, Fe37.10%, Cu16.88%, Si5%) into 50kg intermediate frequency electric furnace for desiliconization and tempering test, set up smelting At a temperature of 1430°C, the cobalt-copper white alloy is melted to form an alloy melt.

[0054] (2) Add 6.0kg metal manganese (99% Mn content) at one time to the alloy melt, and simultaneously feed air into the alloy melt interior and surface (wherein the air flow rate is 2.5m 3 / h) blowing slagging (MnO-SiO 2 ), by controlling the appropriate oxygen partial pressure, the valuable metals copper, cobalt and iron in the furnace are hardly oxidized, while most of the manganese is oxidized.

[0055] (3) Slag removal once, the slag generated in step (2) is separated from the alloy m...

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Abstract

The invention discloses a method for leaching valuable metal from cobalt-copper white alloy. The method includes the following steps that (1) the cobalt-copper white alloy is melted into an alloy melt, wherein the cobalt-copper white alloy contains silicon and almost contains no manganese; (2) a Mn-containing material is added into the alloy melt, and meanwhile gas is led in for blowing and slagging; (3) obtained slag is separated from the melt; (4) the melt with the slag separated out is atomized into alloy powder, wherein the mass friction of Mn in the alloy powder is 0.5%-20%; and (5) the alloy powder is subjected to acid leaching, and the valuable metal is recovered. Due to the fact that the Mn-containing material is added and reacts with the silicon in the cobalt-copper white alloy to generate the MnO-SiO2 slag, the silicon removal effect is achieved, and the method has the beneficial effects of being good in silicon removal effect and small in valuable metal loss. Besides, the melting temperature is much lower than the melting point of CaO-(MgO)-SiO2 binary system or ternary system slag in the prior art.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to a method for leaching valuable metals from cobalt-copper white alloys. Background technique [0002] Cobalt-copper white alloy refers to an alloy containing Co, Cu, Fe and other metals. It is generally obtained from hydrocobalt ore, etc., by blast furnace reduction smelting or electric furnace reduction smelting. Cobalt-copper white alloy contains Cu10-40%, Co10-40%, and Fe20-60%. In addition to Cu, Co, and Fe, it also contains a certain amount of Si and other impurities. The Si content can reach up to 15%. Due to the presence of silicon in the alloy, the corrosion resistance of cobalt-copper white alloys is significantly enhanced, especially for high-silicon white alloys. It is extremely difficult to recover valuable metals through further leaching treatment. [0003] At present, the conventional treatment method of white alloy is to grind the white alloy finely and then leaching it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B7/00C22B15/00C22B23/00
CPCY02P10/20
Inventor 肖松文任国兴毛拥军沈裕军谢美求潘炳郑铁铮陈坚王奉刚钟山夏星
Owner CHANGSHA RES INST OF MINING & METALLURGY
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