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DOI	10.1016/j.jwpe.2019.100873
	Improving flocculation and dewatering performance of iron tailings thickeners
	Arjmand, R.1,2; Massinaei, M.1; Behnamfard, A.1
通讯作者	Massinaei, M.
来源期刊	JOURNAL OF WATER PROCESS ENGINEERING
ISSN	2214-7144
出版年	2019
卷号	31
英文摘要	Most of the mineral processing and hydrometallurgical plants consume large volumes of water. A portion of this water is recycled to the process while the remainder is lost. This necessitates optimization of dewatering systems particularly in arid and semi-arid mining regions. In this paper the bench and full-scale flocculation behavior of iron ore tailings is investigated in order to improve the dewatering performance of tailings thickeners of an iron beneficiation plant. In the batch settling tests, the effect of flocculant dosage (5-20 g/t solid), slurry solids concentration (3-12 %), pH (4-12), and flocculant dilution (0.05-1 %) on the flocculation performance (settling rate, supernatant turbidity, and sediment volume) was studied. The results reveal that the flocculation performance improves at higher slurry pH and flocculate dosage as well as lower slurry solids content. In the plant-site experiments, the influence of increasing the slurry pH (from 8.1-11.2) and dosage of flocculant (from 8 to 13 g/t solid) together with flocculant injection strategy on the thickening performance was examined. The thickeners underflow density and overflow clarity increased with raising the slurry pH and flocculant dosage as well as distributing the flocculant solution at different locations along the feed stream. The proposed modifications were accompanied by a reduction of 23% in the total water consumption corresponding to an annual savings of $576,000.
英文关键词	Iron ore tailings Thickener Dewatering Water recovery Flocculation Sedimentation
类型	Article
语种	英语
国家	Iran
收录类别	SCI-E
WOS记录号	WOS:000485817000077
WOS关键词	POLYMER STRUCTURE TYPE ; MOLECULAR-WEIGHT ; CHARGE-DENSITY ; POLYACRYLAMIDE ; KAOLINITE ; PH ; ADSORPTION ; RHEOLOGY ; BEHAVIOR
WOS类目	Engineering, Environmental ; Engineering, Chemical ; Water Resources
WOS研究方向	Engineering ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217416
作者单位	1.Univ Birjand, Min Engn Dept, POB 97175-376, Birjand, Iran; 2.Sangan Iron Concentrator, Khaf, Iran
推荐引用方式 GB/T 7714	Arjmand, R.,Massinaei, M.,Behnamfard, A.. Improving flocculation and dewatering performance of iron tailings thickeners[J],2019,31.
APA	Arjmand, R.,Massinaei, M.,&Behnamfard, A..(2019).Improving flocculation and dewatering performance of iron tailings thickeners.JOURNAL OF WATER PROCESS ENGINEERING,31.
MLA	Arjmand, R.,et al."Improving flocculation and dewatering performance of iron tailings thickeners".JOURNAL OF WATER PROCESS ENGINEERING 31(2019).