Production process for comprehensively recovering valuable metal of copper, cobalt and iron alloy

Abstract

The invention relates to a production process for comprehensively recovering valuable metal of copper, cobalt and iron alloy, belonging to the technical field of hydrometallurgy and comprising the steps of: preparing fine alloy powder with the mesh of -100 by vibrating, grinding, screening and grading the copper, cobalt and iron alloy; adding water to the fine alloy powder to stir; then adding a required theoretical quantity of fluorine ions F-; adding inorganic acid to react for 1.5 hours; slowly adding oxidant solution; stirring for 1.5 hours at the continuous temperature of larger than 85 DEG C after adding the oxidant solution; separating solid from the solution; adding a reducer whose use quantity is 1.05 times of the theoretical quantity to the obtained filtrate; stirring at normal temperature; reacting for 2 hours; obtaining cuprous chloride and pre-extraction solution after filtering; and finally carrying out P204 extraction and P507 extraction on the pre-extraction solution; and evaporating and crystallizing to obtain cobalt chloride. The production process has the advantages of environmental-friendly performance, simple operation, high efficiency, energy saving and suitability for industrial production.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a production process for preparing cobalt chloride, cuprous chloride and iron oxide red by using copper-cobalt-iron alloy as raw materials. Background technique [0002] Copper-cobalt-iron alloy (commonly known as white alloy) is one of the main forms of rough processing products of cobalt-copper ore in Congo (DRC), and it is also one of the main cobalt raw materials my country will import from Africa in the future. The main components are copper, cobalt, iron, silicon and other elements, the content of which is copper (Cu) 10-45%, cobalt (Co) 8-35%, iron (Fe) 20-55%, silicon (Si) 3-25%. There are two main sources: one It is the converter slag obtained from converter blowing in the process of copper smelting, and then obtained by water quenching in electric furnace reduction smelting; the other is a copper-rich product obtained by smelting cobalt oxide ore and c...

AI Technical Summary

Problems solved by technology

High-pressure acid leaching is mainly a pressurized leaching technology called CESL developed by Comin Corporation of Canada. After the material is ground, it is leached with sulfuric acid at a temperature of 150°C in a high-pressure reactor, and the leaching rate is only about 90%. A relatively mature technology has not yet been formed; the electrochemical dissolution method is mainly to smelt the alloy to obtain the alloy anode plate for electrochemical dissolution to make liquid, and the obtained electrolyte undergoes iron removal by jarosite, calcium and magnesium by fluoride, and cobalt by chlorine gas oxidation. Obtain cobalt hydroxide precipitation [Liao Chunfa etc., produce the research of cobalt oxide technology from copper-iron-cobalt alloy slag, Jiangxi Nonferrous Metals, 1993,13 (2): 24-24], this kind of method metal recovery rate is low, energy consumption Higher; Nantong Ruixiang New Material Co., Ltd. adopts the method of "full fine grinding-oxidative acid leaching" (patent number: CN200710042578.3), and has achieved good results, but in this method, the copper-cobalt alloy needs to be fully ground As fine as 200-300 mesh, a large amount of silicon in the leaching solution enters the solution, resulting in difficulty in filtration and affecting the recovery rate of valuable metals (below 95%), and the leaching solution contains a high concentration of iron. During the subsequent solution purification process It also consumes oxidants, soda ash and other auxiliary materials and produces a large amount of iron slag, which has a long process and high cost

Foshan Bangpu Nickel Cobalt Technology Co., Ltd. proposed the "chlorine gas oxidative acid leaching method" (patent number: CN200810219451.9) to treat white metal, which is shorter than Ruixiang in terms of process, but chlorine gas is a highly toxic gas with a high risk factor , so the requirements for equipment are also very high, which is the main reason why the company has not applied this technology to industrial production so far. Moreover, this method does not solve the problem of consuming a large amount of neutralizing alkali and The problem with large amounts of alum slag

Images