| Mobility factors of cracked ore in vibrating-ore draw shafts |
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| 作者姓名： | 吴爱祥 美立春 陈嘉生 |
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| 作者单位： | SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,Changsha410083,china |
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| 基金项目： | Project(50325415) supported by the National Science Fund for Distinguished Young Scholars，project(50321402) sup ported by the National Science Fund for Innovative Research Group |
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| 摘 要： | The mobile factors of cracked ore in vibrating-ore draw shafts were analyzed. The results show that the mobile coefficient of cracked ores will be mainly influenced by the combination of ore physical factors if the structure dimension and parameters of vibrating ore-draw shafts are sure. It decreases with increasing the cohesion, lump content, lump size and powder content and increases with increasing the porosity. The coefficient decreases with increasing the moisture content, but increases after the moisture content reaches a certain value. Uniform grain leads to better mobility, non-uniform grain leads to worse mobility. The value of the mobile coefficient should be in a range of 0.3 - 1.1 when designing the vibrating ore-draw shafts. According to correlation degree of grey system theory, the effects of factors on the mobility of cracked ore are given in the weight decreasing consequence as follows: moisture content, lump content, distribution of grain size, lump size, porosity, cohesion and powder ore content. It is unreasonable to neglect any one because the values of their weights are not obvious.
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| 关 键 词： | 震动矿石提取 移动系数 灰色系统 粘结性 |
| 收稿时间： | 8 March 2004 |
| 修稿时间： | 16 June 2004 |
Mobility factors of cracked ore in vibrating-ore draw shafts |
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| WU Ai-xiang,JIANG Li-chun,CHEN Jia-sheng.Mobility factors of cracked ore in vibrating-ore draw shafts[J].Journal of Central South University of Technology,2005,12(1):78-82. |
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| Authors: | WU Ai-xiang JIANG Li-chun CHEN Jia-sheng |
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| Affiliation: | (1) School of Resources and Safety Engineering, Central South University, 410083 Changsha, china |
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| Abstract: | The mobile factors of cracked ore in vibrating-ore draw shafts were analyzed. The results show that the mobile coefficient of cracked ores will be mainly influenced by the combination of ore physical factors if the structure dimension and parameters of vibrating ore-draw shafts are sure. It decreases with increasing the cohesion, lump content, lump size and powder content and increases with increasing the porosity. The coefficient decreases with increasing the moisture content, but increases after the moisture content reaches a certain value. Uniform grain leads to better mobility, non-uniform grain leads to worse mobility. The value of the mobile coefficient should be in a range of 0.31.1 when designing the vibrating ore-draw shafts. According to correlation degree of grey system theory, the effects of factors on the mobility of cracked ore are given in the weight decreasing consequence as follows: moisture content, lump content, distribution of grain size, lump size, porosity, cohesion and powder ore content. It is unreasonable to neglect any one because the values of their weights are not obvious. |
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| Keywords: | vibrating ore-draw shaft mobile coefficient gray system theory cohesiveness |
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