A. Escobar, R. Seltmann, C. Broadbent, P. Robinson
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引用次数: 0
摘要
British Fluorspar Ltd (BFL)在Peak Lake District(英国德比郡)经营一个铅-萤石-重晶石矿床，其主要产品为萤石，副产品为铅和重晶石。最近对该CaF2精矿的分析表明，其Pb、P、S、as等有害元素含量较高，影响了产品质量。可磨性研究表明，浮选前物料存在过磨现象，P2O5主要向萤石精矿析出。浴浮选试验数据表明，采用200 g/t的CaCl-CuSO4作为磷酸盐相关矿物的“抑制剂”，可将铅的回收率从2.33%提高到15.03%，将氧化铅回路中的Na2S降至100g/t, pH降至9，将萤石浮选阶段的P2O5回收率从87%降至91%
Upgrading of a lead-fluorspar ore by flotation: effects of ore characteristics and kinetics of flotation
British Fluorspar Ltd (BFL) operates a lead-fluorite-barite deposit located in the Peak Lake District (Derbyshire, UK) with fluorspar as the main product and lead and barite as by-products. Recent analysis of the CaF2 concentrate showed high values of deleterious elements such as Pb, P, S and As, which affect the quality of the product. Grindability studies showed an overgrinding of material prior to the flotation stage with high liberation of P2O5 mainly to the fluorspar concentrate.
Data obtained from bath flotation test indicated an improvement of lead recovery from 2.33 % to 15.03 %, decreasing Na2S to 100g/t and pH to 9 in the lead oxide circuit and a depression of P2O5 in the fluorspar flotation stage from 87 % to 91 % recovered in the tailings using 200 g/t of CaCl-CuSO4 as “depressant” of phosphates related minerals
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