Institute of Green Metallurgy and Process Strengthening
1. Introduction
The Research Institute of Green Metallurgy and Process Augmentation serves as a powerhouse in accelerating the upgrade of nonferrous metals industry in Jiang Xi Province and the other parts of China and in the development of strategic emerging industry of green cycle. Taking advantage of Metallurgical Engineering- the superiority subject among the first rank subjects of Jiang Xi Province, the institute has formed an innovation platform in fundamental research of green metallurgy and process augmentation, technology innovation and personnel training in response to the demand of the industry development.
The institute has conducted its research in major fields. They are the law of migration in complex resources and toxic elements, the detoxification and reuse of toxic elements, the simulation and optimization in the process of green metallurgy, the process augmentation of hydrometallurgy under high temperature and environment-friendly condition, the approach to effectively and environment-friendly reusing the solid waste of nonferrous metal, new energy materials and electrochemistry.
The research institute consists of 17 teachers. They are 2 professors of second grade and 15 doctors. Besides that, there are more than 30 Doctoral students and postgraduates.
The building for experiment in the institute occupies an area of 2200 square meters. With the value of instruments and facilities amounts to nearly 13 million RMB, the institute possesses modern analyzing and testing facilities like ICP, XRF, SEM, DTA and so and a series of experiment instruments like high-pressure reactors and microwave ultrasonic synergistic reactors.
In the past five years, the institute has conducted more than 40 projects of ministry and province level or above. More than 160 high-level academic papers were published and more than 130 papers among them were listed on SCI/EI. More than 40 pieces of patent were authorized. Moreover, the institute has been awarded with 7 awards varying from the Second Award of the Scientific and Technological Progress of the State to the First Award of the Scientific and Technological Progress of Jiang Xi Province.
2. Members Profile
Wang Rui Xiang, Xiao Yan Fei, Li Yu Hu, Zhong Xiao Cong, Tian Lei, Liu Zhi Lou, Yan Kang, Liu Jia Ming, Shi Guan Yong, Xie Yong min, Fan He Lin, Zhang Zhong Tang, Zhang Hai Hui, Wang Jian, Chen Zhe Qin
3. Research Directions
(1) Copper Electrolyte Induced Arsenic Non-destructive Purification Technology
With the continuous expansion of copper smelting scale, high-quality easy-to-exploit copper resources are gradually depleted, copper refined ore level is gradually decreasing, and copper fire smelting process smelting, blowing and anode refining process demidification capacity is limited, which leads to the electrolytic process electrolyte electrolyte arsenic, palladium, radon impurities content is increasing, affecting the quality of electrolytic copper. In view of the problem of arsenic removal in the high acid solution system, a new technology to induce arsenic non-destructive purification induced by copper electrolyte is developed, which not only achieves high-efficiency precipitation of arsenic, but also achieves co-removal of palladium and vanadium, while copper and sulfuric acid in electrolytes have almost no loss.
(2) Recovery Technology of Mercury-containing Smelting Solid Waste Mercury Resource
In 2013, China acceded to the International Mercury Convention, which called for a ban on the production of primary mercury mines and a reduction in the release of mercury into the environment. In the process of smelting non-ferrous metals, a certain amount of mercury-containing solid waste will be formed, if not properly disposed of, will cause serious harm to the environment. Mercury is also a valuable resource for the recovery of mercury from slag, providing a new source of mercury demand in our country. Faced with the dual pressure of environmental protection and mercury resource utilization, it is urgent to develop new and efficient mercury resource utilization technology. The main research contents of this study are: the formation law and mercury endowment form of complex mercury-containing solid waste, the process and mechanism of selective leaching of mercury with matching oxidation, and the process and mechanism of controlling the electrolyte recovery of mercury from mercury-containing solution.
(3) Comprehensive Recovery Technology of Gold, Silver and Copper from Complex Gold Concentrate
China is the world's largest gold producer, with proven reserves of gold resources ranked third in the world, but nearly 30% are difficult to handle complex gold mines. The mineral composition is complex, the mineral properties are variable, and the utilization is difficult. The traditional cyanide method is not suitable for complex gold mines, gold, silver and copper extraction rate is low, cyanide consumption is large, and easy to cause the loss of precious metals and bring environmental safety hazards, it is urgent to develop complex gold refined metal comprehensive recovery technology. The main research contents of this study are: the behavior of phase migration and the mechanism of package formation in the pre-treatment process of complex gold mining roasting, the reconstruction basis of acidic fluorinate system reinforcement, and the law of influence of phase reconstruction process dynamics and reconstruction conditions on the reconstruction effect.
(4) Ion adsorption type rare earth mineral green high-efficiency extraction technology
Ion adsorption rare earth ore is rich in medium and heavy rare earth elements and is a valuable strategic mineral resource in China. At present, ammonium sulfate is widely used in-place immersion - ammonium bicarbonate removal - precipitation process to recover rare earths. The use of ammonium sulfate and ammonium bicarbonate will produce a large amount of ammonia nitrogen wastewater, which is a great threat to the ecological safety of mining areas. Moreover, the traditional process still has the rare earth leaching rate is not high, the process of removal of rare earth loss and other problems, resulting in serious waste of rare earth resources. Therefore, it is urgent to develop a new process for the green and efficient extraction of ion adsorption rare earth minerals in order to achieve the green sustainable development of ionized rare earth resources. The main research contents of this study are: ion adsorption rare earth mineral leaching process and green leaching technology development of magnesium calcium salt system;
(5) Efficient recovery of rare earth phosphor waste
China is the largest producer and consumer of rare earth luminescent materials, with the expiration of product life, rare earth phosphor waste is increasing, the content of rare earth elements in the waste is about 20%, the effective recovery of rare earth elements, can save a large number of radon, rare earth ore mining, the sustainable development of rare earth resources is of great significance. The main research contents of this study are: the mechanism of reconstruction of the alkali melting and roasting process of rare earth phosphor waste, the thermodynamics and dynamics of controlling the stage reduction acid decomposition of alkali melting and roasting products of rare earth fluorescent waste, and the mechanism and mechanism of controlling the decomposition of the reduced acid of the power level.
(6) Zinc refined oxygen pressure leaching process and technology
Zinc refining oxygen pressure leaching technology can not only achieve full wet method of zinc refining, but also has the advantages of high element recovery rate, strong adaptability of raw materials, process cleaning and high efficiency. The team has long been committed to the study of pressure leaching of heavy metal complex vulcanized ore, and has systematically studied the behavior of precious metal leaching, the recovery of loose metals and the behavior of bubbles in the process of oxygen pressure leaching of zinc refined ore. The main research contents of this study are: the effect of cation catalytic leaching system on oxygen pressure leaching of flash zinc ore, the law of S conversion and acid balance and the leaching behavior of rare metals (e.g. vanadium and palladium), and the behavior of the bubbles inside the autoclave under different oxygen pressure leaching conditions.
(7) Special rare earth oxide green scale controlled preparation technology
With the characteristic properties of rare earth elements being fully reflected, its correlation with material performance indicators is becoming more and more obvious, and the quality requirements of rare earth oxide powder in the fields of rare earth luminescence materials, crystal materials, ceramic materials, catalytic materials and other high-tech materials have shifted from simple chemical composition and purity to crystalline, granularity and distribution, appearance and physical control over the surface. At present, the preparation methods of special rare earth oxides mainly include ammonium carbide precipitation, hydrothermal method, sol gel method, spray pyration method, etc., there are problems such as ammonia nitrogen pollution, high cost, long cycle and difficult to prepare on a large scale. Therefore, the development of new precipitation crystallization technology, to achieve all kinds of special rare earth oxide powder (La, Ce, Y elements as the representative) of the green scale can be controlled, for improving the added value of rare earth products and market competitiveness, promote the upgrading of the rare earth industry is of great significance. The main research contents of this study are: the mechanism and process study of sodium carbonate-free precipitation crystalline carbonate rare earths, the process and process research of sodium carbonate precipitation preparation of special material rare earth oxides, the legal preparation mechanism and process control of special rare earth oxides, and the study of impurity behavior and control process in rare earth precipitation process.
(8) Lithium-ion battery high-performance negative material
With the upgrading of energy demand, especially the development of new energy vehicle industry, the market demands higher and higher energy storage level of lithium-ion battery. The development of advanced electrode materials is the most effective way to improve the energy density of batteries, and the transition metal compound material has a high ratio capacity of more than the negative pole of commercial graphite by virtue of its unique structure and conversion mechanism, thus becoming a new research hotspot. How to solve the problem of poor circulation stability of metal compounds and low charge transmission rate is the key to its large-scale application. The main research contents of this study are: the design and construction of metal compound materials for complex structural particles;
(9) Recovery technology of heavy metal resource in electroplating sludge
Although China's electroplating industry is developing rapidly, technical research and application are still lagging behind in waste disposal and utilization. Electroplating sludge usually contains heavy metals such as copper 1%-2%, nickel 0.5%-1%, zinc 1%-2% and chromium 2%-3%, and its metal taste is much higher than that of mineral-rich, which can be used as an important supplement to China's scarce strategic resources. Under the dual pressure of resources and environment, the development and utilization of precious metal resources in electroplating sludge has realistic economic and social significance, which has become an increasingly urgent research topic. The main research contents of this study are: selective extraction technology of precious metals of electroplating sludge, new process of selective complexing-priority hydrolytic precipitation separation of chromium iron, and new process of chromium hydroxide decomposition of chromium-rich slag.
(10) Direct carbon solid oxide fuel cell electric-CO co-production
Direct carbon solid oxide fuel cell (DC-SOFC) is an all-solid energy conversion device with an anode side reaction mechanism that is coupled with CO's electrochemical oxidation reaction and C-CO2 gasification reaction. According to chemical balance calculation, DC-SOFC exhaust gas is mainly CO, which means that the carbon in the battery is not fully oxidized to CO2, but CO is a chemical raw material of higher value than carbon fuel, has high chemical energy, can be regarded as a product. The main research contents of this study are: the reaction system of direct carbon solid oxide fuel cell, the electro-CO co-production performance of direct carbon solid oxide fuel cell, and the construction and electrical properties of DC-SOFC with biomass carbon as fuel.
4. Scientific Research Achievements
(1) Research Projects
[1] National key research and development program topics: copper recycled ash multi-component controlled phase change - rung separation extraction technology and demonstration, 1.46 million yuan, 2019-2022
[2] National key research and development plan: Central mining characteristics of the industrial cluster area solid waste resource utilization integrated demonstration, 900,000 yuan, 2018-2021
[3] Sub-topics of the national key research and development plan: toxic element resourceization and harmless safety disposal technology and equipment, 960,000 yuan, 2019-2022
[4] National key research and development program sub-topics: high sulfur slag crystallization transformation and control process research, 560,000 yuan, 2018-2021
[5] National Natural Science Foundation of China Project: Research on the effect mechanism of mineral phase reconstruction on the chlorination of precious metal chlorination in red earth nickel ore, 600,000 yuan, 2019-2022
[6] NSF Project: Study on the Controlled Reduction Mechanism and Product Stability of Arsenic in the Fe0-As(III)/As(V)-H2O System, 390,000 yuan, 2018-2021
[7] National Natural Science Foundation of China project: based on astro-asbic acid mating-reducing properties of ion adsorption rare earth minerals efficient leaching basic research, 400,000 yuan, 2019-2022
[8] National Natural Science Foundation of China Project: Based on the direct determination of the effect of mineral slurry on the properties of iron flash zinc ore pressurized leaching and regulatory mechanism, 270,000 yuan, 2018-2021
[9] National Natural Science Foundation of China project: research on the directional migration control of tin elements in the process of co-melting of electronic waste, 270,000 yuan, 2020-2022
[10] National Natural Science Foundation of China project: reduction atmosphere of metal compound carbon material capture monomeric mercury machine research, 260,000 yuan, 2019-2021
[11] National Natural Science Foundation of China project: rare earth phosphor waste alkali melting burner phase reconstruction and control potion reduction acid decomposition coupling law, 350,000 yuan, 2021-2024
[12] National Natural Science Foundation of China project: titanium slag melt structure evolution and its impact on transmission properties, 240,000 yuan, 2021-2023
[13] National Natural Science Foundation of China project: difficult to deal with lead tanta- symbicated sulphides oxygen-rich direct smelting process lead-tulphite migration behavior and regulatory principles, 240,000 yuan, 2021-2023
[14] NSC Project: Study on the regulatory mechanism of the initial solidification behavior of steel liquid in crystallizers based on thermal pulse technology, 580,000 yuan, 2021-2024
[15] National Natural Science Foundation of China project: based on the calcification transformation - step-by-step reduction of the mechanism of deep separation of radon, arsenic and alkali from arsenic slag, 350,000 yuan, 2021-2024
(2) Awards and Patents
[1] Xiao Yanfei, Gao Guohua, Xu Zhifeng, Rao Mingxuan, Lai Anbang, a method of sodium carbonate precipitation preparation narrow distribution of ultra-fine oxidation, China, application number: ZL201811016108.4 .
[2] Xiao Yanfei, Gao Guohua, Liu Weiyun, Liao Chunfa, Liu Mingxuan, Rao Mingxuan, a method of sodium carbonate precipitation preparation narrow distribution crystalline carbonate, ZL201811017921.3.
[3] Xiao Yanfei, Qiu Jiang, Xu Zhifeng, Li Jinhui, Zhang Qian, a method of separating rare earths and aluminum.
[4] Xiao Yanfei, Huang Li, Lai Anbang, Lai Wells and Gao Guohua. A method for the efficient and clean extraction of rare earths from ion adsorption type rare earths, China, application number: ZL201810878537.6.
[5] Xiao Yanfei, Gao Guohua, Huang Li, Xu Zhifeng, Xu Yuxiang. A method for extracting rare earths from ion adsorption-type rare earth minerals .
[6] Xiao Yanfei, Huang Li, Lai Wells, Jiao Weifen, Gao Guohua, a method for recovering rare earths and aluminum from ion adsorption rare earth mines.
[7] Xiao Yanfei, Huang Li, Yu Huaping, Jia Weifen, Yang Run, a method for extracting rare earths from weathered shell gonorrhea rare earth minerals.
[8] Xiao Yanfei, Xu Zhifeng, Liang Yong, Zhai Zhicong, Liao Jialong, Wan Zhanghao. A method of leaching ion adsorption in rare earth minerals with gel phase palladium, ZL201610188866.9.
[9] Xiao Yanfei, Huang Li, Xu Zhifeng. A leaching agent and its leaching method for enhancing leaching ionized rare earth minerals.
[10] Xiao Yanfei, Huang Li, Xu Zhifeng. An ion adsorption rare earth ore leaching method, ZL201510652747.X.
[11] Xiao Yanfei, Xu Zhifeng, Liao Jialong, Zhai Zhicong, Wan Zhanghao. A method of hydroxide precipitation to prepare low-sulfur rare earth oxides .P., China, ZL201610187454.3.
[12] Xiao Yanfei, Huang Li, Xu Zhifeng. A leaching agent and its leaching method for ionized rare earth mineral leaching process.
[13] Xiao Yanfei, Huang Li, Xu Zhifeng. A Method for Strengthening-Reducing Rare Earths in Ion-immersed Rare Earth Mines, China, ZL 201510741699.1.
[14] Xiao Yanfei, Xu Zhifeng, Wan Zhanghao, Liao Jialong, Zhai Zhicong. A method to reduce the content of sulfates in rare earths hydroxide, ZL 201610187379.0.
[15] Xiao Yanfei, Huang Li, Xu Zhifeng, Yang Fengli, Ye Xinyu. A step-by-step precipitation recovery of rare earths in ion adsorption-type rare earth mineral leaching liquid.
[16] Liu Zhilou, Xu Zhifeng, Zhong Xiaocong, Chen Fanghui, an efficient anti-sulfur copper-based demercury adsorbent preparation method and its application, ZL201711328522.4
[17] Liu Zhilou, Xu Zhifeng, Lan Mingyan, Chen Fanghui, Zhong Xiaocong, a method of separating mercury, selenium and lead from colored smelting acid mud, ZL2017111327545.3
[18] Liu Zhilou, Xu Zhifeng, Cai Xin, Zhong Xiaocong, Chen Fanghui, a method of selective recovery of mercury from smelting waste slag, ZL201711327556.1
(3) Academic papers
[1] Liu Zhuilou, Wang Dongli, Yang Shu, Liu Hui, Liu Cao, Xie Xiaofeng, Xu Zhifeng*. Selective recovery of mercury from high mercury-containing smelting wastes using an iodide solution system[J]. Journal of hazardous materials, 2019, 363, 179-186.
[2] Liu Zhilou, Yang Shu, Li Ziliang, Xie Xiaofeng, Li Yunhu, Sun Zhumei, Luo Shuang, Xu Zhifeng*. Three-layer core-shell magnetic Fe3O4@C@Fe2O3 microparticles as a high-performance sorbent for the capture of gaseous arsenic from SO2-containing flue gas[J]. Chemical Engineering Journal, 2019, 378:122075
[3] Liu Zhilou, Li Ziliang, Xie Xiaofeng, Yang Shu, Fei Jiangchi, Li Yuhu, Xu Zhifeng*, Liu Hui*. Development of Recyclable Iron Sulfide/Selenide Microparticles with High Performance for Elemental Mercury Capture from Smelting Flue Gas over a Wide Temperature Range[J]. Environmental Science & Technology, 2019, 54(1):604-612.
[4] Yan Kang, Liu Zhilou, Li Ziliang, Yue Rihui, Guo Feng, Xu Zhifeng*. Selective separation of chromium from sulphuric acid leaching solutions of mixed electroplating sludge using phosphate precipitation[J]. Hydrometallurgy, 2019,186:42-49.
[5] Yang Shu, Wang Dongli, Liu Hui, Liu Cao, Xie Xiaofeng, Xu Zhifeng, Liu Zhilou*. Highly stable activated carbon composite material to selectively capture gas-phase elemental mercury from smelting flue gas: copper polysulfide modification[J]. Chemical Engineering Journal, 2019, 358:1235-1242
[6] Lai Anbang, He Qiang, Rao Minglu, Gao Guohua, Xiao Yanfei *.Synthesis of highly uniform ceria nanosheets by carbon dioxide carbonization and their growth mechanism[J] Journal of Solid State Chemistry, 2020,290: 121593.
[7] Lai Anbang, Lai Fuguo, Huang Li, Qiu Jiang, Zhou Xiaofang, XiaoYanfei*. Non-ammonia enrichment of rare earth elements from rare earth leaching liquor in a magnesium salt system I: Precipitation by calcium oxide[J]. Hydrometallurgy, 2020，193：105318；
[8] Huang Li, Gao Guohua, Wu Ran, Zhang Qian, Lai Fuguo, Xiao Yanfei*, Non-ammonia enrichment of rare earth by magnesium oxide from rare earth leaching liquor in magnesium salt system, Journal of Rare Earths, 2019，37 (8)：886-894.
[9] Lai Fuguo, Huang Li, Gao Guohua, Yang Run, Xiao Yanfei*. Recovery of rare earths from the ion-absorbed rare earths ore with MgSO4-ascorbic acid compound leaching agent[J]. Journal of Rare earths, 2018, 36 (5): 521-527.
[10] Xiao Yanfei*, Gao Guohua, Huangli, Feng Zongyu, Lai Fuguo, Long Zhiqi. A discussion on the leaching process of the ion-adsorption type rare earth ore with the electrical double layer model[J], Minerals Engineering. 2018,120: 35-43
[11] Lai Fuguo, Gao Guohua, Huang Li, Xiao Yanfei*, Yang Run, Li Kaizhong. Compound leaching of rare earth from the ion-adsorption type rare earth ore with magnesium sulfate and ascorbic acid[J]. Hydrometallurgy,2018, 179: 25–35.
[12] Xiao Yanfei*, Lai Fuguo, Huang Li, Feng Zongyu, Long Zhiqi. Reduction leaching of rare earth from ion-adsorption type rare earths ore: II. Compound leaching. Hydrometallurgy, 2017, 173. 1–8.
[13] Li Kaizhong, Liu Huiping, Lai Fuguo, Xiao Yanfei*, Hu Yongmei, Wang Chao, Xu Haibo. Migration of natural radionuclides in the extraction process of the ion adsorption type rare earths ore. Hydrometallurgy , 2017, 171, 236–244.
[14] Xiao Yanfei, Feng Zongyu, Huang Xiaowei*, Huang Li, Chen Yingying, Liu Xiangsheng, Wang Liangshi, Long Zhiqi. Recovery of rare earth from the ion-adsorption type rare earths ore: II. Compound leaching. Hydrometallurgy, 2016, 163:83-90.
[15] Xiao Yanfei, Huang Li, Long Zhiqi, Feng Zongyu*, Wang Liangshi. Adsorption ability of rare earth elements on clay minerals and its practical performance. Journal of Rare Earths, 2016, 34(5):543-548.
[16] Xiao Yanfei, Feng Zongyu, Hu Guhua, Huang Li, Huang Xiaowei*, Chen Yingying, Long Zhiqi. Reduction leaching of rare earth from ion-adsorption type rare earths ore with ferrous sulfate. Journal of Rare Earths, 2016, 34(9):917-923.
[17] Xiao Yanfei, Feng Zongyu, Huang Xiaowei*, Huang Li, Chen Yingying, Wang Liangshi, Long Zhiqi. Recovery of rare earths from weathered crust elution-deposited rare earth ore without ammonia-nitrogen pollution: I. leaching with magnesium sulfate. Hydrometallurgy, 2015, 153: 58-65.
[18] Xiao Yanfei, Liu Xiangsheng, Feng Zongyu, Huang Xiaowei*, Huang Li, Chen Yingying, Wu Wenyuan. Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore. Journal of Rare Earths, 2015, 33(5): 545-552.
[19] Xiao Yanfei, Feng Zongyu, Hu Guhua, Huang Li, Huang Xiaowei*, Chen Yingying, Li Minglai. Leaching and mass transfer characteristics of elements from the ion-adsorption type rare earth ore. Rare Metals, 2015, 34(5): 357-365.
[20] Xiao Yanfei, Chen Yingying, Feng Zongyu, Huang Xiaowei*, Huang Li, Long Zhiqi, Cui Dali. Leaching characteristics of ion-adsorption type rare earths ore with magnesium sulfate. Transactions of Nonferrous Metals Society of China, 2015, 25(11): 3784−379.
5. Research Institute Experimental Equipment
The institute's experimental room area of more than 3200 square meters, with ICP, XRF, IR, SEM, TG-DTA and other modern analytical testing equipment, with a series of autoclave reactor devices, microwave ultrasonic co-reactor, GPS high temperature pressure sintering furnace and other experimental equipment, the total value of equipment nearly 23 million yuan.
6. Itroduction of our Team
Green Metallurgy and Process Strengthening Institute makes a positive, lively, united and friendly collective. In scientific research, we work hard, hard work, in life, solidarity and mutual assistance. Under the leadership of the research room teacher, we have made progress and grown together, and completed many important scientific research projects. In addition to studying and working, carried out a lot of colorful activities: Mid-Autumn dinner, cold dinner, collective spring tour, in play and entertainment, close the distance between teachers and students, enhance feelings, cultivate a sense of teamwork.
