炼铅炉渣用于矿山充填胶凝剂的试验研究
作者：
杨新华;王洪武;杨仕教;王华;文磊
期刊：
黄金 ,2013年(12):32-37 ISSN：1001-1277
作者机构：
南华大学核资源工程学院;[王洪武] 湖南风格科技有限公司;[王华] 云南驰宏锌锗股份有限公司;[杨新华; 文磊; 杨仕教] 南华大学
关键词：
炼铅炉渣;充填;活性激发剂;膏体;抗压强度
摘要：
在分析炼铅炉渣理化特性的基础上，通过外界条件激发铅渣潜在活性，将其作为胶凝材料应用于矿山充填替代部分或全部水泥，进行全尾砂膏体试验。试验采用全面试验法，试验结果表明，选用合适的激发剂及铅渣胶凝材料配方，铅渣胶凝材料替代部分水泥用于矿山井下充填可以满足矿山生产的强度要求。
语种：
中文
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不同粒径分布分维数铀矿石的浸出规律
作者：
叶勇军;丁德馨;李广悦;扶海鹰;宋键斌;...
期刊：
中国有色金属学报 ,2013年23(10):2921-2927 ISSN：1004-0609
通讯作者：
Ding, D.-X.(dingdxzzz@163.com)
作者机构：
[叶勇军; 胡南; 李广悦; 宋键斌; 扶海鹰; 丁德馨] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
铀矿石;堆浸;粒径分布;分维数
摘要：
为了研究堆浸铀矿石粒径分布对堆浸效果的影响，配置5组不同粒径分布分维数的铀矿样进行室内柱浸试验，测定不同时刻浸出液的铀浓度和pH值，计算对应时刻的浸出率和酸耗。结果表明：分维数越大的铀矿样，浸出液中铀离子浓度峰值出现得越迟、峰值越小，且在峰值出现后，铀离子浓度越大；在浸出初期，分维数越大的铀矿样，浸出率越低，这种差距在浓度峰值出现之前逐渐增大，峰值过后逐渐减小；而在浸出后期，分维数大的铀矿样的浸出率依次逐渐超过分维数较小的铀矿样的浸出率，并保持进一步扩大的趋势；在浸出初期，若要获得相同的浸出率，分维数越大的铀矿样，其酸耗量也越大，酸耗量的差距随着浸出时间的延长先增大而后逐渐减小；在浸出后期，要获得相同的浸出率，酸耗则出现相反的变化情况。
语种：
中文
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堆浸铀矿堆液体饱和渗流规律的研究
作者：
叶勇军;丁德馨;李广悦;宋键斌;李峰
期刊：
岩土力学 ,2013年34(8):2243-2248 ISSN：1000-7598
通讯作者：
Ding, D.-X.(dingdxzzz@163.com)
作者机构：
[叶勇军; 李广悦; 李峰; 宋键斌; 丁德馨] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
通讯机构：
Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
堆浸;铀矿堆;液体饱和渗流;支持向量机;分维数
摘要：
铀矿堆浸,溶浸液在铀矿堆中的渗流对浸出效果有非常重要的影响,研究堆浸铀矿堆的渗透特性,对改善铀矿堆浸效果具有重要的意义。采用取自我国南方某铀矿山的堆浸铀矿石,配制10组不同粒径分维数的试样,利用自制的饱和渗流试验装置,对其液体饱和渗流的规律进行试验研究,获得相应的渗透率和流态指数。利用试验结果,分析粒径分维数对渗透率的影响。采用支持向量机(SVM)模型,以粒径分维数和孔隙率作为输入量,建立渗透率和流态指数预测模型。结果表明,(1)在文中试验条件下,堆浸铀矿堆的液体饱和渗流遵循非Darcy指数定律,流态指数在1.1~1.5之间,且渗透率随着粒径分维数的增加而逐渐减小;(2)渗透率的SVM预测模型和流态指数的SVM 预测模型给出预测值的相对误差分别低于8%和7%,可以满足工程应用的要求。
语种：
中文
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Fault tree analysis on radiation hazards in underground uranium mines and prevention countermeasures
作者：
Ye, Yongjun* ;Ding, Dexin;Li, Feng;Wang, Shuyun
期刊：
Advanced Materials Research ,2013年610-613:766-770 ISSN：1022-6680
通讯作者：
Ye, Yongjun
作者机构：
[Ding, Dexin; Ye, Yongjun; Li, Feng] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.;[Ye, Yongjun; Wang, Shuyun; Li, Feng] Univ S China, Sch Environm protect & safety Engn, Hunan, Peoples R China.
通讯机构：
[Ye, Yongjun] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.
会议名称：
2nd International Conference on Energy, Environment and Sustainable Development (EESD 2012)
会议时间：
OCT 12-14, 2012
会议地点：
Jilin, PEOPLES R CHINA
会议主办单位：
[Ye, Yongjun;Ding, Dexin;Li, Feng] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.^[Ye, Yongjun;Li, Feng;Wang, Shuyun] Univ S China, Sch Environm protect & safety Engn, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Countermeasure;Fault tree analysis;Radiation hazard;Uranium mine
摘要：
Workers in underground uranium mines work chronically in the opening radiation environment, the radiation hazards they suffered has attracted public's attention. So some effective measures must be carried out to control worker's received radiation dose. Fault tree analysis is a deductive system safety analysis method, which can offer decision basis for accident prevention and safety management. Based on the above two advantages, firstly, the paper analyzes the radiation hazards in underground uranium mines and their influencing factors. Then, the fault tree of radiation hazards is established in underground uranium mines, five groups of minimal path sets and the structure importance degree of each basic event are obtained. Finally, according to the results of fault tree analysis, some prevention countermeasures are putted forward to prevent radiation hazards. © (2013) Trans Tech Publications, Switzerland.
语种：
英文
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伊犁盆地某砂岩铀矿铀赋存形态及其地浸意义
作者：
陈亮;谭凯旋;谢焱石;刘江;黄伟;...
期刊：
矿业研究与开发 ,2013年(05):118-121 ISSN：1005-2763
作者机构：
1. 南华大学矿业工程博士后流动站;2. 南华大学核资源工程学院;3. 铀矿冶生物技术国防重点学科实验室
关键词：
铀赋存形态;砂岩铀矿;地浸技术;伊犁盆地
摘要：
以伊犁盆地某砂岩铀矿为研究对象,采用逐级化学提取技术定量分析了其铀的赋存形态,各赋存形态铀含量由高到低依次为:碳酸盐结合态（均值44.58%）、铁锰氧化物结合态（均值28.46%）、可交换离子态（均值12.51%）、残渣态（均值7.90%）及硫化物及有机物结合态（均值6.52%）;分析证实,该铀形态分布特征有利于减少地浸成本与环境保护,活性铀（可浸出的铀形态）包括除残渣态外的其余4种铀形态,占绝对主体地位（均值92.08%）,表明该砂岩铀矿可浸性良好,铀浸出率高。活性铀高的样品,其品位也高,活性铀相对较低的样品,其品位相应偏低,说明可被浸出的铀金属总量与该砂岩铀矿储量的比值应较高。因而,基于铀赋存形态分析,认为该砂岩铀矿适合采用地浸技术开采。
语种：
中文
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基于模糊综合评价法的通风设备及设施安全可靠性分析
作者：
羊帆;戴剑勇
期刊：
南华大学学报(自然科学版) ,2013年27(1):37-41 ISSN：1673-0062
作者机构：
南华大学核资源工程学院,湖南衡阳,421001;[戴剑勇; 羊帆] 南华大学
关键词：
通风设备和设施;可靠性;模糊综合评价;权重
摘要：
建立矿井通风设备及设施可靠性评价体系,采用AHP法确定权重指标,最终应用模糊综合评价法,并使用MATLAB软件实现可靠性的综合评价结果.
语种：
中文
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反硝化细菌生物反应器去除地浸采铀矿山退役采区地下水中NO_3~--N的试验研究
作者：
王清良;胡南;丁德馨;张国奇;胡鄂明;...
期刊：
原子能科学技术 ,2013年47(8):1300-1306 ISSN：1000-6931
通讯作者：
Ding, D.-X.(dingdxzzz@163.com)
作者机构：
[张洪灿; 张国奇; 胡鄂明; 胡南; 王清良; 丁德馨] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China;[蒋晓辉; 阳奕汉] Tianshan Uranium Corporation, China National Nuclear Corporation, Yining 835000, China;[王清良] School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
通讯机构：
Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
反硝化细菌生物反应器;微生物修复;地浸采铀;污染地下水
摘要：
地浸采铀矿山退役采区地下水的NO_3~--N污染是一备受关注的问题。本文通过对取自某地浸采铀矿山退役采区的污泥进行驯化,得到了能去除地浸采铀矿山退役采区污染地下水中NO_3~--N的反硝化细菌,自行设计了上流式固定床反硝化细菌生物反应器,研究了pH值、C/N比和水力停留时间(HRT)对反硝化细菌生物反应器去除地浸采铀矿山退役采区污染地下水中NO_3~--N的影响。研究结果表明:当进液pH值为6.50、NO_3~--N浓度为1 000 mg/L、HRT为2 3 h时,NO_3~--N的去除率和去除速率分别达97%和388 mg/(h?L),生物反应器处理废水的能力达0.35 m~3/(h?m~3);当进液NO_3~--N浓度为550 mg/L、HRT为1.4 h时,NO_3~--N的去除率和去除速率分别达96%和368 mg/(h?L),生物反应器处理废水的能力达0.62 m~3/(h?m~3);反硝化细菌生物反应器适宜的运行条件是pH值为5.00~8.00,C/N比为0.6~0.8。
语种：
中文
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Match between the solidification of the cemented backfill and the vertical stress in the excavated ore body
作者：
刘玉龙;丁德馨;李广悦;胡南
期刊：
采矿与安全工程学报 ,2013年30(4):526-530 ISSN：1673-3363
通讯作者：
Liu, Y.-L.(zhongguoliuyulong@163.com)
作者机构：
[刘玉龙; 丁德馨; 李广悦; 胡南] Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, China
通讯机构：
[Liu, Y.-L.] K;Key Discipline Lab. for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
胶结充填体;充填体能量聚集;矿体开挖能量释放;匹配特征
摘要：
以某铀矿山中和后的堆浸尾渣为骨料,制备了渣浆体积分数为78%,80%和83%,灰渣比为1∶6,1∶8,1∶10,1∶15,1∶20,1∶25,1∶30的尾渣胶结充填料试样,经不同养护时间后,测定了它们的单轴抗压强度;建立了尾渣胶结充填体固化强度与养护时间的关系。结果表明,最终强度值、强度响应系数、强度增长稳定时间和初始强度（t=3）等力学参数能定量描述不同尾渣胶结充填体的强度随养护时间的变化特征。引入能量匹配系数表征岩体开挖释放比能与充填体变形比能关系,得到上向进路胶结充填采矿法中一步骤充填体固化时间与二步骤矿体回采时间匹配与矿岩容重、矿岩埋深、矿岩弹性模量、充填体灰渣比、渣浆体积分数和养护时间密切相关。采用某铀矿山工程实例验证了本研究结果。
语种：
中文
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Comprehensive Genomic Characterization of Campylobacter Genus Reveals Some Underlying Mechanisms for its Genomic Diversification
作者：
Zhou, Yizhuang;Bu, Lijing;Guo, Min;Zhou, Chengran;Wang, Yongdong;...
期刊：
PLOS ONE ,2013年8(8):e70241 ISSN：1932-6203
通讯作者：
Chen, Liyu
作者机构：
[Zhou, Yizhuang; Guo, Min] BGI Shenzhen, Shenzhen, Guangdong, Peoples R China.;[Bu, Lijing] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.;[Zhou, Chengran] Sichuan Univ, Dept Biol, Chengdu 610064, Sichuan Provinc, Peoples R China.;[Wang, Yongdong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Hunan, Peoples R China.;[Chen, Liyu] Cent South Univ, Xiangya Sch Med, Dept Microbiol, Changsha, Hunan, Peoples R China.
通讯机构：
[Chen, Liyu] C;Cent South Univ, Xiangya Sch Med, Dept Microbiol, Changsha, Hunan, Peoples R China.
关键词：
Campylobacter;Genomics;Phylogenetic analysis;Ribosomal RNA;Paleogenetics;Bacterial genomics;Sequence alignment;Viral genomics
摘要：
Campylobacter species.are phenotypically diverse in many aspects including host habitats and pathogenicities, which demands comprehensive characterization of the entire Campylobacter genus to study their underlying genetic diversification. Up to now, 34 Campylobacter strains have been sequenced and published in public databases, providing good opportunity to systemically analyze their genomic diversities. In this study, we first conducted genomic characterization, which includes genome-wide alignments, pan-genome analysis, and phylogenetic identification, to depict the genetic diversity of Campylobacter genus. Afterward, we improved the tetranucleotide usage pattern-based naïve Bayesian classifier to identify the abnormal composition fragments (ACFs, fragments with significantly different tetranucleotide frequency profiles from its genomic tetranucleotide frequency profiles) including horizontal gene transfers (HGTs) to explore the mechanisms for the genetic diversity of this organism. Finally, we analyzed the HGTs transferred via bacteriophage transductions. To our knowledge, this study is the first to use single nucleotide polymorphism information to construct liable microevolution phylogeny of 21 Campylobacter jejuni strains. Combined with the phylogeny of all the collected Campylobacter species based on genome-wide core gene information, comprehensive phylogenetic inference of all 34 Campylobacter organisms was determined. It was found that C. jejuni harbors a high fraction of ACFs possibly through intraspecies recombination, whereas other Campylobacter members possess numerous ACFs possibly via intragenus recombination. Furthermore, some Campylobacter strains have undergone significant ancient viral integration during their evolution process. The improved method is a powerful tool for bacterial genomic analysis. Moreover, the findings would provide useful information for future research on Campylobacter genus.
语种：
英文
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Efficiency of adsorption of wastewater containing uranium by fly ash
作者：
Li, Shiyou;Xie, Shuibo* ;Zhao, Cong;Zhang, Yaping;Liu, Jinxiang;...
期刊：
Advanced Materials Research ,2013年639-640(1):1295-1299 ISSN：1022-6680
通讯作者：
Xie, Shuibo
作者机构：
[Xie, Shuibo; Cai, Ting; Zhao, Cong; Zhang, Yaping; Liu, Jinxiang; Li, Shiyou] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Xie, Shuibo] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
会议名称：
1st International Conference on Advances in Civil Infrastructure Engineering (ICACIE 2012)
会议时间：
SEP 15-16, 2012
会议地点：
Changsha, PEOPLES R CHINA
会议主办单位：
[Li, Shiyou;Xie, Shuibo;Zhao, Cong;Zhang, Yaping;Liu, Jinxiang;Cai, Ting] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Adsorption;Fly ash;Isotherm;Uranium
摘要：
The effects of pH, different initial concentrations of uranium and adsorption time were investigated to study the properties of the sorption of uranium by fly ash. The results show that pH value is the major factor of dominating adsorption rate. The highest adsorption capacity was obtained at pH 5 and the adsorption time was 60 minutes. The increasing of initial uranium concentration resulted in the decreasing of U removal rate and the increasing of adsorption quantity, and the maximum adsorption capacity was 8.38mg/g. The adsorption behavior accorded with both the Freundlich and Langmuir isotherms.
语种：
英文
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某砂岩型铀矿中铀形态及其可浸出性的分析研究
作者：
周春风;马强;冯志刚
期刊：
湖南科技学院学报 ,2013年(12):38-42 ISSN：1673-2219
作者机构：
[周春风] 湖南省有色地质勘查局;南华大学核资源工程学院;[马强; 冯志刚] 南华大学
关键词：
铀矿物;逐级化学提取;硫酸浸出
摘要：
论文采用逐级化学提取技术和硫酸浸出试验，通过对新疆某地浸砂岩型铀矿10件矿芯试样进行试验研究。结果表明：（1）10g/L的硫酸浓度就可以浸出到硫化物及有机物结合态和结晶态，硫化物及有机物结合态通过添加H 2 O 2等氧化剂，可以破坏硫化物以及有机物的结构，进而浸出铀；（2）结晶态铀是原生矿物中铀矿物重要的组成部分，在地浸采铀过程中，依靠提高溶浸剂的酸度和增加氧化剂对提高浸出率是无益的。
语种：
中文
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A kinetic model for heap leaching of uranium ore considering variation of model parameters with depth of heap
作者：
Ding, De-xin* ;Song, Jian-bin;Ye, Yong-jun;Li, Guang-yue;Fu, Hai-ying;...
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2013年298(3):1477-1482 ISSN：0236-5731
通讯作者：
Ding, De-xin
作者机构：
[Li, Guang-yue; Song, Jian-bin; Ye, Yong-jun; Hu, Nan; Ding, De-xin; Fu, Hai-ying; Wang, Yong-dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, De-xin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Kinetic model;Uranium ore;Heap leaching;Model parameters;Heap depth
摘要：
Many kinetic models for heap leaching of low grade ores have been proposed and the model parameters have been treated as constants. However, some of these model parameters change with the depth of the heap. In the present work an apparatus consisted of six columns with different heights was designed and used to simulate the leaching behavior within a 3-m-high uranium ore heap at a uranium mine in South China. It was found that the model parameters α and ω for heap leaching of the uranium ore varied with the depth of the heap, and that the relationships between α and between ω and the depth of the heap were in the form of the logistic and the quadratic functions, respectively. Furthermore, a kinetic model for heap leaching of the uranium ore considering the variation of the model parameters with the depth of the ore was proposed. The kinetic model gave the fitting precision of more than 95 % and prediction precision of more than 93 %. The present work provided an approach for establishing the kinetic model for heap leaching of low grade uranium ores. © 2013 Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
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构建核特色“结晶矿物学”课程教学新体系
作者：
陈亮;冯志刚;谢焱石;黄伟;王正庆;...
期刊：
科技资讯 ,2013年(29):194-195 ISSN：1672-3791
作者机构：
南华大学核资源工程学院 湖南衡阳 421001;[刘珊; 王正庆; 胡杨; 谢焱石; 黄伟; 马强; 陈亮; 谭凯旋; 冯志刚] 南华大学
关键词：
结晶矿物学;资源勘查工程;核特色;教学体系
摘要：
为了适应21世纪地学人才教育发展和我国核工业发展的需要,本文对南华大学资源勘查工程专业"结晶矿物学"课程教学改革进行了探索。提出了立足专业核特色,注重实践环节,创建核特色"结晶矿物学"教学实习基地,改革现有课程考核方式等,从而构建核特色"结晶矿物学"课程教学新体系的设想。
语种：
中文
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Screening of native hyperaccumulators at the huayuan river contaminated by heavy metals
作者：
Hu Nan;Zheng Jifang* ;Ding Dexin;Li Guangyue;Yin Jie;...
期刊：
Bioremediation Journal ,2013年17(1):21-29 ISSN：1088-9868
通讯作者：
Zheng Jifang
作者机构：
[Yin Jie; Yu Jia; Li Guangyue; Hu Nan; Ding Dexin; Chen Xin; Zheng Jifang] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Zheng Jifang] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
关键词：
Alternanthera philoxeroides;Huayuan River;hyperaccumulator;metal pollution;phytoremediation
摘要：
Plant, soil, and sediment samples were taken from the Fuqiao area within the Huayuan River basin in South China. Concentrations of manganese, zinc, cadmium, and lead in the samples were measured, and the characteristics of the plant samples to absorb, transfer, and accumulate the target metals were analyzed. It was indicated that the concentrations of target metals in 13 plant samples greatly exceeded the background values of target metals in plants over the world, and that the plant species might evolve to the accumulating ecotypes for the target metals under the long-term stress from the contaminated environment. Among 13 plant species, Alternanthera philoxeroides exhibited the highest accumulation capacities for the target metals, amounting to 6511, 13,784, 155, and 104 mg/kg in its shoots for manganese, zinc, cadmium, and lead, respectively. Its bioaccumulation coefficients for manganese, zinc, cadmium, and lead were 5.08, 49.23, 36.78, and 34.81, respectively, and its transfer factors for manganese, zinc, cadmium, and lead were 7.53, 3.19, 7.38, and 1.29, respectively. The results showed that Alternanthera philoxeroides satisfied the criteria for the hyperaccumulator for zinc and cadmium, and that it might be a potential native plant species for phytoremediation of the contaminated soil, sediment, and river water by the target metals within the basin. © 2013 Taylor and Francis Group, LLC.
语种：
英文
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方铅矿与脆硫锑铅矿混合精矿的浮选分离研究
作者：
曹杨;王清良;陶红标;曹学锋;胡鄂明
期刊：
现代矿业 ,2013年(10):24-26 ISSN：1674-6082
作者机构：
南华大学核资源工程学院;中南大学资源加工与生物工程学院
关键词：
方铅矿;脆硫锑铅矿;脱药;浮选
摘要：
西藏某锑铅选矿厂的脆硫锑铅矿与方铅矿的混合精矿产品有价元素为铅、锑,矿样经活性炭脱药后,对混合精矿进行浮选分离试验,获得了铅品位为72.09％、回收率为50.96％的铅精矿,锑品位为10.89％、回收率为76.67％的锑精矿,实现了铅、锑的有效分离.
语种：
中文
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新疆某砂岩铀矿地球化学特征及其地浸意义
作者：
陈亮;谭凯旋;谢焱石;刘江;黄伟
期刊：
金属矿山 ,2013年(7):101-104 ISSN：1001-1250
作者机构：
南华大学矿业工程博士后流动站;南华大学核资源工程学院;铀矿冶生物技术国防重点学科实验室
关键词：
地球化学特征;铀赋存形态;地浸采铀;砂岩铀矿
摘要：
以新疆某砂岩铀矿为研究对象,分析了其地球化学特征（主量、微量元素及铀赋存形态）及其对地浸采铀的影响。样品中铀赋存形态表现出活性铀占主体地位、惰性铀所占比例小的特征。SiO2、Na2O含量及烧失量均对浸出液铀浓度具有较大的影响,微量元素分布特征对铀浸出的影响很小。铀赋存形态是影响铀浸出率的决定性因素,即活性铀含量越高,铀浸出率一般越高,反之亦然。从主量元素分布特征及铀赋存形态角度考虑,本砂岩铀矿是适合采用酸法地浸技术开采的。
语种：
中文
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A fractal kinetic model for heap leaching of uranium ore with fractal dimension of varied particle size distribution
作者：
Ding, De-Xin* ;Fu, Hai-Ying;Ye, Yong-Jun;Hu, Nan;Li, Guang-Yue;...
期刊：
Hydrometallurgy ,2013年136:85-92 ISSN：0304-386X
通讯作者：
Ding, De-Xin
作者机构：
[Fu, Hai-Ying; Li, Guang-Yue; Song, Jian-Bin; Ye, Yong-Jun; Hu, Nan; Ding, De-Xin; Wang, Yong-Dong] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, De-Xin] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Fractal kinetic model;Heap leaching;Fractal dimension;Uranium ore;Particle size distribution
摘要：
The varied particle size distribution of uranium ore for heap leaching, with its particle sizes ranging from 0 to 9 mm, is taken from a uranium mine in South China. Five uranium ore samples with the fractal dimensions (D) of particle size distribution of 1.6, 1.8, 2.0, 2.2 and 2.4, respectively, are further prepared by mixing different weights of the uranium ores for the size fractions of + 8/- 9, + 7/- 8, + 6/- 7, + 5/- 6, + 4/- 5, + 3/- 4, + 2/- 3, + 1/- 2, + 0.5/- 1 and - 0.5 mm, respectively. The five samples are leached in columns to investigate the influences of the fractal dimensions of particle size distribution on their leaching performances. The leaching data are analyzed using the shrinking core model, and the whole process of the column leaching is divided into two phases based on the pH and the potential vs. saturated calomel electrode (SCE) of the pregnant leach solution (PLS) from the columns. When the value of pH is greater than 2.0 and the potential vs. SCE is less than 400 mV, the leaching is in the first phase, the rate constant during the first phase k<inf>1</inf> is controlled by initial rate constant k<inf>0</inf> and the increase rate parameter λ, and k<inf>0</inf>, λand the length of the period for the first phase T<inf>1</inf> all have linear relationships with D. When the value of pH is less than or equal to 2.0 and the potential vs. SCE is greater than or equal to 400 mV, the leaching is in the second phase, and the rate constant during the second phase k<inf>2</inf> has non-linear relationship with D. From these analytical results, a fractal kinetic model for heap leaching of the uranium ore with fractal dimension of varied particle size distribution is established. And the experimental results show that the model is capable of predicting the recovery of uranium for heap leaching of uranium ore with fractal dimension of varied particle size distribution. ©2013 Elsevier B.V.
语种：
英文
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房建工程桩基检测控制技术应用
作者：
冯春林
期刊：
城市建设理论研究(电子版) ,2013年(33) ISSN：2095-2104
作者机构：
衡阳市吉隆城建检测有限公司，南华大学核资源工程学院;[冯春林] 衡阳市吉隆城建检测有限公司
关键词：
桩基工程;房建工程;检测控制技术;应用
摘要：
目前，桩基工程在我国房建工程中应用十分广泛，是房建工程的重要组成部分之一，其质量的优劣直接影响到这些房屋和住户的安全。因此，在房建工程施工中，桩基工程检测控制就是其中一个非常重要的环节。随着近些年来在高层建筑和超高层建筑中越来越多的应用，建设单位对房建工程质量的要求越来越高，桩基工程检测技术所占的地位和发挥的作用也越来越重要。
语种：
中文
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Removal and recovery of uranium (VI) from aqueous solutions by immobilized Aspergillus niger powder beads
作者：
Ding, De-Xin* ;Tan, Xiang;Hu, Nan;Li, Guang-Yue;Wang, Yong-Dong;...
期刊：
Bioprocess and Biosystems Engineering ,2012年35(9):1567-1576 ISSN：1615-7591
通讯作者：
Ding, De-Xin
作者机构：
[Li, Guang-Yue; Tan, Yan; Hu, Nan; Tan, Xiang; Ding, De-Xin; Wang, Yong-Dong] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.;[Tan, Yan; Ding, De-Xin] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.;[Ding, De-Xin] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 W Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ding, De-Xin] U;Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, 28 W Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
Biosorption;Uranium;Aspergillus niger;Equilibrium;Kinetics
摘要：
The immobilized Aspergillus niger powder beads were obtained by entrapping nonviable A. niger powder into Ca-alginate gel. The effects of pH, contact time, initial uranium (VI) concentration and biomass dosage on the biosorption of uranium (VI) onto the beads from aqueous solutions were investigated in a batch system. Biosorption equilibrium data were agreeable with Langmuir isotherm model and the maximum biosorption capacity of the beads for uranium (VI) was estimated to be 649.4 mg/g at 30 °C. The biosorption kinetics followed the pseudo-second-order model and intraparticle diffusion equation. The variations in enthalpy (26.45 kJ/mol), entropy (0.167 kJ/mol K) and Gibbs free energy were calculated from the experimental data. SEM and EDS analysis indicated that the beads have strong adsorption capability for uranium (VI). The adsorbed uranium (VI) on the beads could be released with HNO3 or HCl. The results showed that the immobilized A. niger powder beads had great potential for removing and recovering uranium (VI) from aqueous solutions. © Springer-Verlag 2012.
语种：
英文
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Fractal character of structural control on uranium mineralization in south china
作者：
Xie, Yanshi;Tan, Kaixuan;Chen, Liang;Huang, Wei;Hu, Kaiguang;...
期刊：
Applied Mechanics and Materials ,2012年229-231:2597-2600 ISSN：1660-9336
通讯作者：
Xie, Y.(xie_yanshi@qq.com)
作者机构：
[Tan, Kaixuan; Hu, Kaiguang; Chen, Liang; Huang, Wei; Wang, Xiucai; Xie, Yanshi] School of Nuclear Resource and Nuclear Fuel Engineering, University of South China, Hengyang Hunan, China;[Chen, Liang] Post-doctoral Research Station of Mining Engineering, University of South China, Hengyang Hunan 421001, China
通讯机构：
[Xie, Y.] S;School of Nuclear Resource and Nuclear Fuel Engineering, , Hengyang Hunan, China
会议名称：
4th International Conference on Mechanical and Electrical Technology, ICMET 2012
会议时间：
24 July 2012 through 26 July 2012
关键词：
Faults;Fractal;South china;Uranium deposits
摘要：
South China is the most important uranium producer in the country. Most uranium deposits in south China are strictly controlled by NE-NNE trending regional fracture structure. Fractal analyses on spatial distribution of uranium deposits and regional fracture structure in south China have been done in this paper. It indicates that the spatial distribution of both uranium deposits and regional fracture structure in south China show fractal character. The fractal dimension D=1.4142 for the spatial distribution of regional fracture structure is significantly greater than the critical value and it indicate a higher ripening degree in the fracture structure evolution and an advantages to fluid flow and uranium mineralization. The fractal dimension D=1.0527 for the spatial distribution of uranium deposits in south China show a lower complexity than regional fracture structure. The fractal spatial distribution of uranium deposits in south China is the result of the evolution of the fractal fracture structure system. ©(2012) Trans Tech Publications, Switzerland.
语种：
英文
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