Method for desiliconizing cobalt white alloy

A cobalt white alloy and desiliconization technology, which is applied in the field of high-purity cobalt salt and preparation of electric copper, can solve the problems of high energy consumption, large energy consumption, long process, etc., and achieves high metal recovery rate, simple operation and easy processing. Effect

Inactive Publication Date: 2012-01-18
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the method consumes a lot of energy, has a long process, and consumes a lot of time, which is an unsolvable problem.
In the selective oxidation roasting process, a large amount of energy is further consumed and the cooling process takes a long time. After roasting, the alloy powder is partially transformed into a spinel structure, resulting in agglomeration, so a second milling process is required.
The patent 200910306801.X "cobalt-copper alloy leaching method" developed by Peng Guowei uses fluorine additives and organic acids for leaching. The leaching process is operated under normal pressure and the temperature is below 100°C, but fluorine reagents are added to the acidic solution , it is more difficult to deal with the corrosion of equipment, fluorine-containing waste water and fluorine-containing waste residue generated by subsequent leaching

Method used

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  • Method for desiliconizing cobalt white alloy
  • Method for desiliconizing cobalt white alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The composition of the alloy is Co 34.97%, Fe 36.38%, Cu 15.90%, and Si 6%. The test is carried out in a 2kg intermediate frequency furnace. The crucible is an alumina corundum crucible. The cobalt oxide (Co content is 69%), the amount of one addition is 200g, the slagging agent is calcium oxide, the amount of one addition is 100g, the reaction time is 15min, the slag is removed once, and the alloy powder is atomized to 1070g (dry basis). The alloy composition is Co 45.42%, Cu 14.86%, Fe 33%, Si 1.18%; sulfuric acid leaching is used directly, the pH value is controlled at about 1.0, the temperature is 60°C, and the oxidant sodium chlorate is added to control the slurry potential to 400mv, copper, cobalt The leaching rates are 99.2% and 99.6% respectively.

Embodiment 2

[0042] The composition of the alloy is Co 36.87%, Fe 33.45%, Cu 13.45%, Si 12.15%, using 1000kg

[0043]The intermediate frequency furnace is used for desiliconization, the crucible is a special crucible, the amount of alloy added is 600kg, the melting temperature is 1400°C, the desiliconization agent is waste iron oxide (iron content is 64%), and the amount added at one time is 70kg, and the slagging agent is calcium oxide , the amount added at one time is 60g, the reaction time is 15min, the slag is removed once, and the desiliconization treatment is repeated three times. A total of 210kg of iron oxide and 180kg of calcium oxide are added, and 630kg of alloy powder (dry basis) is obtained by atomization. The alloy composition is Co35. 01%, Cu 12.50%, Fe 40.18%, Si 2.01%, the recovery rates of cobalt and copper in the desiliconization process are 99.70%, 97.58%, respectively, and the removal rate of silicon is 82.63%.

[0044] Take 2kg of alloy powder and directly use sulfuri...

Embodiment 3

[0046] The composition of an alloy is 28.87% Co, 40.45% Fe, 18.45% Cu, and 10.16% Si. A 1000kg intermediate frequency furnace is used for desiliconization. The crucible is a special crucible. The alloy addition is 600kg. The melting temperature is 1350℃. Lithium cobaltate (with a cobalt content of 60%), the amount of one addition is 70kg, the slagging agent is magnesium oxide, the amount of one addition is 50g, the reaction time is 15min, the slag is removed once, and the desiliconization treatment is repeated three times, adding a total of Lithium cobalt oxide 210kg, magnesium oxide 150kg, atomized alloy powder 660kg (dry basis), alloy composition is Co35.34%, Cu 16.71%, Fe 35.48%, Si 0.58%, desiliconization rate is 93.72%.

[0047] The alloy powder is directly leached with sulfuric acid, the pH value is controlled at about 1.0, the temperature is 90°C, and the oxidant sodium chlorate is added to control the slurry potential to 450mv. The leaching rates of copper and cobalt ar...

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Abstract

The invention provides a method for desiliconizing cobalt white alloy, relating to a method for preparing electrolyzed copper and high-purity cobalt salt by taking high-silicon cobalt white alloy as raw material. The method is characterized in that the desiliconizing process sequentially comprises the following steps of: (1) melting cobalt white alloy; (2) adding a desiliconization agent for reaction; (3) then adding a slag former for slagging; (4) separating slag from melt; and (5) atomizing the separated melt into alloy powder used for recovering nickel, cobalt and copper. In the method fordesiliconizing cobalt provided by the invention, the slag former is available and is low in price; the desiliconization agent can be waste cobalt oxide, waste copper oxide, waste lithium cobaltite, crude cobaltic hydroxide and the like, thus being beneficial to comprehensive recovery of raw materials; alloy after desiliconization is directly atomized into powder; the alloy after desiliconization can stably produce alloy powder with silicon content of being less than 2%. The silicon content is less than 3%, the conventional leaching method can be adopted for recovering cobalt and copper, posttreatment is easy, operation is simple and easy, metal recovery rate is high, and application prospect is good.

Description

technical field [0001] A method for desiliconization of cobalt white alloy relates to a method for preparing electric copper and high-purity cobalt salt by using high-silicon cobalt white alloy as a raw material. Background technique [0002] my country is a country that lacks cobalt resources, and about 90% of the cobalt raw materials required for production depend on foreign imports. In March 2007, the Congo formulated a policy of restricting exports, prohibiting the export of raw ore, and only allowing local processing into primary smelted metal products (intermediate products of cobalt smelting or cobalt white alloy) to be exported. my country relies heavily on imported cobalt concentrates to be processed into cobalt salts The situation will be gradually reversed to import cobalt smelting intermediate products or use cobalt white alloy as raw material. In the Congo, water cobalt ore containing 2-10% copper and 3-8% cobalt is used as raw material, and blast furnace reduct...

Claims

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Application Information

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IPC IPC(8): C22C3/00C22C1/02B22F9/08C22B23/00C22B15/00
CPCY02P10/20
Inventor 尹飞江培海王振文王吉坤杨小华阮书锋
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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