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Cao H.-Z.,Zhejiang University of Technology | Chen J.-Z.,Guangxi China Tin Group Co. | Yuan H.-J.,Zhejiang University of Technology | Zheng G.-Q.,Zhejiang University of Technology
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2010

A novel treatment process of lead anode slime bearing high antimony and low silver was developed by a potential-controlled chloridization leaching and continuous distillation. The experimental results show a high Sb3+ concentration, 489.2 g/L, in the leaching solution for two-stage countercurrent leaching process, and the leaching rates of Sb, Cu, Bi more than 99 when the potential is controlled at 450 mV. When the leaching solution is distillated and concentrated at 120 °C, almost all the silicon compound is evaporated into the concentration distillate and exists as amorphous hydrated silica. By the continuous distillation, high pure SbCl3 could be prepared, and AsCl3 is enriched in the distillate while metals Bi, Cu are enriched in the continuous distillation residue. As a result, the recovery rate of Sb is more than 95. © 2010 The Nonferrous Metals Society of China.


Zhu L.-Y.,Zhejiang University of Technology | Yang Q.-Y.,Zhejiang University of Technology | Chen J.-Z.,Guangxi China Tin Group Co. | Chen P.,Zhejiang University of Technology | Zheng G.-Q.,Zhejiang University of Technology
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2012

The water network synthesis of Sb recovery from lead anode slime with high antimony and low silver content using chloridization-leaching was analyzed. A superstructure was firstly proposed for the water network synthesis, based on which, an non-linear program (NLP) model considering both the waste minimization and Sb recovery profit was developed. Besides the traditional mass balance, the chemical reactions were also included. The model parameters were determined based on experimental data of real process. The optimal results are obtained with an improvement of 87.4% reusable water. Discussions on the flowsheet with optimal structure were also presented.


Zhao C.-H.,Guangxi University | Zhao C.-H.,Guangxi China Tin Group Co. | Chen J.-H.,Guangxi University | Wu B.-Z.,Guangxi China Tin Group Co. | Long X.-H.,Guangxi University
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2014

Adsorption of water on sulfide surfaces and natural floatability of sulfide minerals were studied using density functional theory (DFT) method. All computational models were built in a vacuum environment to eliminate the effects of oxygen and other factors. H2O molecule prefers to stay with pyrite and sphalerite surfaces rather than water, whereas for galena, chalcocite, stibnite, and molybdenite, H2O molecule prefers to stay with water rather than the mineral surfaces. On the other hand, pyrite surface favors N2 more than water, while sphalerite surface cannot adsorb N2. These results show that galena, stibnite, chalcocite, and molybdenite are hydrophobic, while sphalerite is hydrophilic. Although pyrite has certain hydrophilicity, it tends to be aerophilic because the reaction of pyrite with H2O is weaker than pyrite with N2. Thus, pyrite, galena, chalcocite, stibnite and molybdenite all have natural floatability. © 2014 The Nonferrous Metals Society of China.


Chen J.H.,Guangxi University | Huang Y.L.,Guangxi University | Wu B.Z.,Guangxi China tin group co. | Li D.R.,Guangxi University
Advanced Materials Research | Year: 2013

This paper mainly studied the removal of metal ions in wastewater from a mine. On the research basis of using traditional coagulation-sedimentation process to remove metal ions, this study took Zn and Cd ions as major research targets, and conducted the research of advanced treatment of mining wastewater. Enhanced coagulation and enhanced ion exchange process was adopted, and water quality indexes after treatment reach the national third class standard of surface water quality. © (2013) Trans Tech Publications, Switzerland.


Chen Q.,Central South University | Chen Q.,Guangxi University | Su J.,Guangxi China Tin Group Co.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2013

A new scientific proposition of synergetic mining was put forward by introducing the concept of synergism based on the current harmonic mining concepts. The clear definition and its significance of synergetic mining were given, and its technology system was built too. The difference and connection of the synergetic mining and the concepts and its coupling property were analyzed. Taking the mining of cataclastic resource with the many cavities in a certain mine as an example, the application of synergetic mining technology was studied. The mining environment reconstructing layering and stripping medium-length hole caving mining method was developed. The synergetic mining schemes design for the main ore layers were accomplished well. The application results show that synergetic mining as a new mining mode with strong vitality and great value of application can provide a scientific and suitable development direction for hidden danger resources or those deposits with special engineering purposes.


Chen Q.-F.,Guangxi University | Chen D.-Y.,Guangxi China Tin Group Co. | Wei C.-S.,Guangxi University
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013

The distinguishing of connectivity of structural planes is an applicative problem in rock mass engineering because of the lack of the relevant theoretical basis. So, it has an important theoretical meaning that the connectivity principle and distinguishing method of the structural planes is studied. Firstly, the coplanarity conditions of any two structural planes in engineering rock mass space are analyzed by using the mathematical methods such as space geometry and vector. Secondly, the similarity conditions between any two structural planes are demonstrated on the basis of the geological features. Thirdly, the distinguishing conditions of connection of the structural planes are given, and formulas for the correlativity of the structural planes are put forward. So, a complete set of theoretical system of the connectivity principle and the distinguishing method of the structural planes is established. Finally, combining the survey data of Zn-polymetallic ore body in the roadway of Tongkeng Mine in Guangxi Province, the application effect of the above theory is studied. The results show the connectivity of the structural planes can be judged quickly and effectively using the proposed principle and method. This study may provide a theory basis for judging the connectivity of the structural planes in other rock mass projects.


Chen Q.-F.,Central South University | Chen Q.-F.,Guangxi University | Chen Q.-F.,Guangxi China Tin Group Co. | Gu D.-S.,Central South University | And 2 more authors.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

According to the materials mechanics theory, the synergistic effect mechanical model of roof-artificial pillar was established. By analyzing the deformation coordinated mechanism of the composite structure, the relationship expression of compression amount of the artificial pillar was derived. Based on the catastrophe theory, the cusp catastrophe model of artificial pillar destruction was constructed and the mechanical judgment expression under the necessary and sufficient condition of instability was derived. The results show that the artificial pillar's sudden instability has a close correlation with the rigidity ratio k and medium uniformity coefficient m. Through changing the artificial pillar's mechanics parameter and the geometric parameter, the roof's stability is regulated to a certain extent, which provides the basic mechanics basis for the cavity stress environment reconstructing and the artificial pillar's scientific design.


Chen Q.-F.,Central South University | Chen Q.-F.,Guangxi University | Zhou K.-P.,Central South University | Gu D.-S.,Central South University | Su J.-H.,Guangxi China Tin Group Co.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

Cavity treatment is the important part for preventing and controlling cavity disaster and the necessary condition of safety mining of the peripheral resources. Guided by the theories and ideas of mining environment reconstructing, synergetic theory and inset style design, cavity synergetic utilization mechanism was proposed from mining layout in mine system for harmonizing resources mining. Some basic principles were established. The basic modes of cavity synergetic utilization were built and classified systematically. The synergetic utilization mechanism of cavity was studied. The engineering application result shows that not only the new mechanism treats the hidden danger and safety mining of the hidden danger resources is established, but also the cost of cavity treatment is reduced remarkably, and even at zero-cost. The results can provide the technologic support for safety mining of hidden danger resources with cavities and remnant ore resources with cavities.


Chen Q.-F.,Guangxi University | Chen D.-Y.,Guangxi China Tin Group Co. | Zhao Y.-M.,Guangxi University | Luo X.-W.,Guangxi China Tin Group Co.
Yantu Lixue/Rock and Soil Mechanics | Year: 2013

The search and visualization of dangerous blocks as an important part of safety management of modern underground mine, has not been solved until now because of various reasons. By adopting the research thinking of the subsystem-global mapping and making the two codes of GeneralBlock and 3DMine available with compatible DXF file, the technology of automatic search and systematical visualization of dangerous blocks of underground mine is studied. It takes the developing tunnels at the level of 255 m and 305 m of zinc polymetallic orebody in Tongkeng mine for example. Firstly, the survey data of structural plane are input into GeneralBlock to calculate and analyze the blocks; and the DXF files including dangerous blocks are output. Secondly, those DXF files are input into 3DMine in order to make the dangerous blocks visualization; and their solid models are saved and input into roadway models in 3DMine for measuring the positions of dangerous blocks precisely. At last, the dangerous blocks in the developing tunnels are made systematical visualization by marking them on red alert. The application results show that 27 movable stable blocks and 1 unstable block are found in the developing tunnels by using this integrated technology. Research results testify that the automatic search and systematical visualization technology of dangerous blocks of underground mine can be achieved successfully, which can be regarded as a reference for safety management, disaster warning and fractures consolidation of underground mine.


Zhong S.,Central South University | Zhong S.,Guangxi China Tin Group Co. | Hu H.,Central South University | Liu J.,Central South University
Advanced Materials Research | Year: 2012

Monoclinic Li 3V 2(PO 4) 3 was synthesized by a microwave method. The influence of sintering temperatures and time on the synthesis of Li 3V 2(PO 4) 3 was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and charge-discharge test. The results of these tests shows that the Li 3V 2(PO 4) 3 sample synthesized at 850 °C for 15 min has pure and perfect crystal. The charge-discharge test shows the Li 3V 2(PO 4) 3 sample with optimal synthesis condition has the best initial discharge capacity of 120 mAh/g, with capacity retention of 101 mAh/g after 50 cycles, in the voltage range of 3.0 V-4.2 V. © (2012) Trans Tech Publications, Switzerland.

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