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Comika company expressed its gratitude to the mining and metallurgy group for its technical and design consulting services

Recently, the mining and metallurgy group received a letter of thanks from Comika mining simple Co., Ltd. (hereinafter referred to as "Comika company") to express its gratitude for the mineral processing technology research and design consulting services provided by the mining and metallurgy group for the oxidized ore construction of Comika phase II project.

It was mentioned in the letter that the mining and metallurgy group overcame many difficulties and completed various tasks with quality and quantity, which laid a solid foundation for the stable production of oxidized ore in the next stage of Komika phase II project. A few days ago, the second phase hydrometallurgy plant has completed the commissioning with materials and produced the first batch of cathode copper. Comika expects to continue to draw a blueprint with the mining and metallurgy group on the hot land of Congo (DRC), promote the cooperation between the two sides to go deep and practical, go steady and go far, build a greater America Africa and create a better future together.

Comika company is subordinate to Wanbao mineral Co., Ltd. (hereinafter referred to as "Wanbao mineral"), which is a subsidiary of Wanbao mineral for the development and operation of kamoya copper cobalt ore.

The geological structure of kamoya copper cobalt deposit is relatively complex, there are many kinds of ores, and the grade fluctuates greatly. In 2011, in order to help promote the development of phase I South II ore body, the mineral processing Institute of mining and metallurgy group carried out Beneficiation Technology Research on kamoya sulfide ore, oxide ore and mixed ore, developed mineral processing technology suitable for ore characteristics, and optimized the design process of phase I project. After the first phase project was put into operation, the output and standard were quickly achieved, with an annual output of 60000 tons of copper cobalt sulfide concentrate. The average recovery rate of copper and cobalt were 93.12% and 91.46%, respectively. The economic benefits were significant, which was highly appraised by comica company.

In June 2016, in order to promote the development of phase II oxide ore project, Comika company commissioned the Metallurgical Institute of mining and metallurgy group to carry out "small scale experimental study on the leaching process of kamoya copper oxide ore", and carried out detailed technological research on the East II ore body, North ore body, medium ore body and the west of main ore body in kamoya mining area, which provides the basis for the feasibility study and preliminary design of phase II project.

Due to the large amount of dolomite in the ore body of kamoya, the acid consumption of direct leaching of raw ore is too high, reaching about 310kg / t-ore. however, the supply of sulfuric acid in DRC is short and the price is very high, which seriously affects the economic benefits of the project. In order to improve the economic benefits of copper oxide ore in the development of medium-sized ore bodies, on the basis of small-scale experimental study of leaching process, the mineral processing Institute and the Metallurgical Institute organized backbone forces to give full play to their respective advantages. Through the comparison of multiple schemes, the combined process technology of high acid consumption copper cobalt oxide ore in Comika medium ore body was developed. Under the premise of little change in the comprehensive recovery rate of copper and cobalt, beneficiation and metallurgy were greatly reduced Cost recovery provides technical support for the promotion of the project. At the same time, the mineral processing Institute and the Metallurgical Institute have cooperated to verify the adaptability of the combined process technology for the East II ore body, the North ore body, the west main ore body, and the kazibiz ore body. Combining with the copper and cobalt Market Situation and the results of beneficiation and metallurgy test, reasonable suggestions on the development sequence of oxide ore are given.

The project team of Mineral Processing Institute and Metallurgical Institute of mining and metallurgy group has served for 10 months in Congo (DRC) of Comika company. In addition to the research on the combined process technology of hydrometallurgy and beneficiation and metallurgy of oxidized ore, the project team also carried out technical research on the problems encountered in the field production, and solved the mineral processing technical problems and on-site production problems of carbon shale type refractory sulfide ore Lay a solid foundation for production tasks.

In 2019, in order to strengthen the cooperation of African regional projects and help the "belt and road" initiative, the mining and metallurgy group and Wanbao minerals established a joint beneficiation and metallurgy laboratory in Comika company of Congo (DRC). The joint laboratory will provide greater support for the development of subsequent Comika projects, on-site services and the development of other mining projects.