Method for desiliconizing cobalt white alloy

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...

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

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