干旱区生态环境知识资源中心(Arid): The Micro-Scale Mechanism of Metal Mine Tailings Thickening Concentration Improved by Shearing in Gravity Thickener

Arid

DOI	10.32604/jrm.2021.014310
	The Micro-Scale Mechanism of Metal Mine Tailings Thickening Concentration Improved by Shearing in Gravity Thickener
	Jiao, Huazhe; Wu, Yachuang; Wang, Wei; Chen, Xinming; Wang, Yunfei; Liu, Juanhong; Feng, Wentao
通讯作者	Wang, W (corresponding author), Henan Polytech Univ, Coll Safety Sci & Engn, Jiaozuo 454000, Henan, Peoples R China.
来源期刊	JOURNAL OF RENEWABLE MATERIALS
ISSN	2164-6325
EISSN	2164-6341
出版年	2021
卷号	9 期号:4 页码:637-650
英文摘要	Higher concentration is beneficial for the Paste and Thickened Tailings (PTT) operation in metal mine. Partial paste thickeners are produced lower density underflow. Flocculated tailings are intended to form a water entrapped network structure in thickener, which is detrimental to underflow concentration. In this study, the continuous thickening experiment was carried out for ultra-fine tungsten tailings to study the influence of rake shearing on underflow. The micro pores structure and seepage flow in tailings bed before and after shearing are studied by CT and simulation approach to reveal the shearing enhancement mechanism of thickening process. The results shown that, the underflow concentration is increased from 61.4 wt% to 69.6 wt% by rake shearing in a pilot scale thickener, the porosity decreased from 46.48% to 37.46%. The entrapped water discharged from sticks structure more than sphere spaces. In items of seepage, after shearing, the seepage flow channel of tailings underflow is becoming longer, which caused the decreasing average flow rate decreases and absolute permeability. The absolute permeability is negatively correlated with tortuosity. The rake shearing can destroy the flocs structure; change the effective stress to increase the concentration. Higher underflow concentration improves the waste recycling and water recovery rate, especially for arid areas.
英文关键词	Metal mine tailings gravity thickening shearing effect pore microstructure reverse direction seepage flow channel
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000615079300004
WOS关键词	CEMENTED PASTE BACKFILL ; DEWATERING BEHAVIOR ; SETTLING BEHAVIOR ; KAOLINITE ; FLOCCULATION ; PERFORMANCE ; SUSPENSIONS ; WASTE ; OXIDE
WOS类目	Green & Sustainable Science & Technology ; Materials Science, Composites ; Polymer Science
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Polymer Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350986
作者单位	[Jiao, Huazhe; Wu, Yachuang; Chen, Xinming; Wang, Yunfei] Henan Polytech Univ, Int Joint Res Lab Henan Prov Underground Space De, Jiaozuo 454000, Henan, Peoples R China; [Jiao, Huazhe; Wang, Wei] Henan Polytech Univ, Coll Safety Sci & Engn, Jiaozuo 454000, Henan, Peoples R China; [Liu, Juanhong] Univ Sci & Technol Beijing, Civil & Resource Engn Sch, Beijing 100000, Peoples R China; [Feng, Wentao] Pingdingshan Tianan Coal Min Co Ltd, Coal Mine 11, Pingdingshan 467000, Peoples R China
推荐引用方式 GB/T 7714	Jiao, Huazhe,Wu, Yachuang,Wang, Wei,et al. The Micro-Scale Mechanism of Metal Mine Tailings Thickening Concentration Improved by Shearing in Gravity Thickener[J],2021,9(4):637-650.
APA	Jiao, Huazhe.,Wu, Yachuang.,Wang, Wei.,Chen, Xinming.,Wang, Yunfei.,...&Feng, Wentao.(2021).The Micro-Scale Mechanism of Metal Mine Tailings Thickening Concentration Improved by Shearing in Gravity Thickener.JOURNAL OF RENEWABLE MATERIALS,9(4),637-650.
MLA	Jiao, Huazhe,et al."The Micro-Scale Mechanism of Metal Mine Tailings Thickening Concentration Improved by Shearing in Gravity Thickener".JOURNAL OF RENEWABLE MATERIALS 9.4(2021):637-650.