摘要：
To investigate the relationship between nonlinear parameters and spontaneous combustion tendency of sulfide ores, nine different sulfide ore samples were taken from a pyrite mine in China, and induced spontaneous combustion experiment was carried out in the laboratory. Different stages of the induced spontaneous combustion process were studied by integrating wavelet technology and nonlinear dynamics theory. The results show that ignition points of all the ore samples are above 330 ~°C, indicating that sulfide ores of the pyrite mine are difficult to combust spontaneously under normal mining conditions. Spontaneous combustion process includes three stages: incubation stage, development stage and approaching stage. The average temperature rising rate of the three stages are 1.0~oC/min,2.0~oC/min and 4.2~oC/min, respectively. During the spontaneous combustion process, mean values of approximate entropy and correlation dimension increase at first, and then decrease in the following stage. The mean value of the maximum Lyapunov exponent increases with the passage of reaction time. In a whole, correlation among the three nonlinear parameters firstly weakens, then enhances, and the best correlation period is at approaching stage. As ignition point increases, the maximum Lyapunov exponent of approaching stage decreases. Therefore, combustible tendency of sulfide ores could be qualitatively evaluated based on the maximum Lyapunov exponent of this stage.
作者机构：
[Yin Zhigang; Sun Wei; Zhang Chenhu; Tang Honghu; Hu Yuehua; Guan Changping; Guan Qingjun] School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China;[Liu Jiandong] School of Nuclear Resources Engineering, University of South China, Hengyang, 421001, China
通讯机构：
[Wei Sun] S;School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
摘要：
In this paper, bulk flotation followed by separation was investigated to concentrate purified molybdenite product from Jinduicheng molybdenum ores(Shanxi province, China). The bench scale tests mainly focussed on separation of molybdenite from other sulfide minerals using the new type of depressants.The effect of each single depressant, including organic depressant-modified dextrin(MD), P-Nokes reagent(PN) and sodium trithiocarbonate(ST), and their mixtures on galena, chalcopyrite and other sulfide ores, was examined in turn by changing the concentrations used in cleaner flotation tests. Closed circuit experiments were carried out under the optimal condition and satisfying recovery and grade of molybdenite concentrate could be achieved(86.294% and 53.157%, respectively). A potential reagent regime was developed, with more environmental friendly and more economical advantages due to the introduction of modified dextrin.
作者机构：
[杨雨山; 喻清; 丁德馨] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[王浩; 李峰; 喻清; 丁德馨; 杨雨山; 胡南] Key Discipline Laboratory of Defense Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
School of Resources and Safety Engineering, Central South University, Changsha, China
摘要：
A new method, named relocation, was proposed to reduce the impact of sensor errors systematically, especially when available data of sensors are abundant. The procedure includes evaluating the reliability of every sensors datum, processing the initial location by the credible data, and selecting a set of equations with optimal noise tolerance according to the relative relationship between the initial location and sensors location, then calculating the final location by k-mean voting. The results obtained in this research include comparing traditional location method with the presented method in both simulation and field experiment. In the field experiment, the location error of relocation method reduced 41.8% compared with traditional location method. The results suggested that relocation method can improve the fault-tolerant performance significantly.
作者机构：
[张钦礼; 薛希龙; 王新民] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[薛希龙] School of Nuclear Resources Engineering, University of South China, Hengyang, 421001, China
通讯机构：
School of Resources and Safety Engineering, Central South University, Changsha, China
作者机构：
[谢水波; 陈婧; Zeng, Taotao; 王亮; 凌辉] Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, 421001, China;[谢水波] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
通讯机构：
[Xie, S.] H;Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang, China
作者机构：
[喻清; 丁德馨] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[余园平; 罗艺; 胡南; 王启方; 喻清; 李登科; 丁德馨] Key Discipline Laboratory of Defense Biotechnology in Uranium Mining and Hydrometallurgy, University of South china, Hengyang, 421001, China
通讯机构：
School of Resources and Safety Engineering, Central South University, Changsha, China
作者机构：
[王晓亮; 彭国文] School of Chemistry and Chemical Engineering, University of South China, Hengyang, China;[杨锦然; 黄红; 周归] Wang Chuanshan College, University of South China, Hengyang, China;[彭国文] School of Resources and Safety Engineering, Central South University, Changsha, China;[胡南; 肖方竹; 彭国文; 丁德馨; 张志军] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
School of Chemistry and Chemical Engineering, University of South China, Hengyang, China
作者机构：
[董发勤; 刘明学; 聂小琴] Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, China;[张东] Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, China;[刘宁; 聂小琴] Key Laboratory of Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, China;[丁德馨; 李广悦; 聂小琴] Fundamental Science on Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, China
