The research department of green process engineering of resources and environment is committed to carrying out major technical research on key metal resources such as vanadium, chromium, titanium, copper, nickel, cobalt, lithium and niobium, wet clean extraction, high-purity material preparation, high-quality recycling, intelligent data management and control key technological innovation are carry out major technological research. The development of strategic emerging industries and ensure the stability of the national economic supply chain. The research department of green process engineering of resources and environment has 9 groups, 1 analysis platform, 160 staffs and 132 students.
The main achievements in 2020 are as follows:
Develop key technologies such as vanadium titanium magnetite reduction melting separation sodium short process preparation of ultra pure iron, vanadium chromium titanium unconventional medium wet extraction separation, short process preparation of high purity vanadium products, output complete sets of technology, and build 50000T/a vanadium titanium magnetite sodium smelting and clean vanadium extraction demonstration project.
Aiming at the “One Belt One Road” low-grade copper sulfide, overcoming the biochemical coupling leaching technology of refractory chalcopyrite, and forming a large-scale bio-heap leaching technology for low-grade copper ore. The team has assisted building of two largest biohydrometallurgy projects in Myanmar (total of 150,000 tonnes of cathode copper per year, investment of 1.7 billion dollars) of Asia through joint technology research and technology transfer, and made the use of the newly developed technologies.
Aiming at the problems of low utilization rate of nickel cobalt lithium resources, heavy secondary pollution and low-end products of laterite nickel ore and waste power battery, the technology and equipment of simultaneous leaching of nickel and cobalt at atmospheric pressure and medium recycling, short process technology of waste lithium electrothermal decomposition, etc. were broken through, the pilot construction and operation of 3000t/a laterite nickel ore leaching were completed, and the demonstration project of full component utilization of 2 million lithium waste saggers was built, 4 sets were applied and popularized.
In the field of solid waste resource recycling, solve the long-term dilemma of high-end recycled metal recycling. Build 2 sets of 200,000 tons/year calcium carbide slag preparation desulfurizer demonstration projects; build 30,000 tons of waste slag microcrystalline production demonstration projects. Multiple solid waste technologies have driven more than 30 companies to form a secondary resource recycling ecosystem.
Aiming at the efficient recycling technology of carbon and sulfur resources, it took the lead in the research and development field of isocyanate clean process, and proposed a new coal based non phosgene clean synthesis isocyanate (MDI) process. The 10,000-ton project demonstration has been completed.In view of the large amount of sodium sulfate and pickling waste liquid produced in our country every year, the technology of sodium sulfate to soda ash combined with ammonium sulfate production were developed. The first set of sodium sulfate soda ash combined with ammonium sulfate industrial unit has been completed; more than 20 sets of waste acid treatment demonstration projects have been completed.
Fig.1 The 50kt/a demonstration project for vanadium-bearing titanomagnetite by sodium oxide smelting method
Fig.2 Demonstration projects with 200,000 tons/year desulfurizing agent prepared by calcium carbide slag
Fig.3 Demonstration plant of making soda from sodium sulfate