Jun 15, 2018 Generally, flotation tailings are produced as a byproduct of flotation and still consist of un‒recovered copper. In addition, it is expected that more tailings will be produced in the coming years due to the increased exploration of low‒grade copper ores.
Jul 19, 2018 Thickener feed dilution is often used for enhanced flocculation and sediment compressibility. This work investigated the effect of feed dilution on thickener performance for copper flotation tailings.
Keywords: flotation tailings, leaching, copper 1. INTRODUCTION The off-balance resources present the environmental problem and potential resource for copper extraction. The most commonly used method in the world for copper valorization from off-balance mine resources is …
Alunite flotation concentrate extracted from copper tailings is considered to be a resource for recovery of potassium, aluminum and gallium, which mainly contains alunite, quartz, dickite and ...
Two copper flotation tailings samples, one from the Almalyk Mining and Metallurgical Complex, Uzbekistan (sample designated AMMC) and the other from Whitehorse (WT), Yukon, Canada, were bioleached at laboratory scale. Acidophilic, iron- and sulphur-oxidizing cultures were enriched from the two tailings and these cultures were used for the testing.
Feb 18, 2020 As ore grades constantly decline, more copper tailings, which still contain a considerable amount of unrecovered copper, are expected to be produced as a byproduct of froth flotation. This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis (MLA) integrated with scanning electron microscopy–energy ...
Nov 16, 2020 If copper tailings are directly recovered by sulfide flotation, it will not only affect the yield but also waste a lot of chemicals. Therefore, before using the sulfide flotation method to treat copper tailings, it is necessary to pre-enrich the original tailings to discard a large number of gangue minerals in advance, reduce the subsequent ...
Aug 03, 2017 Flotation tailings from copper production are deposits of copper and other valuable metals, such as Mo, V and U. New hydrometallurgical technologies are more economical and open up new possibilities for metal recovery. This work presents results of the study on the extraction of copper by mixed extractant consisting p-toluidine dissolved in toluene. The possibility of simultaneous liquid ...
Aug 16, 2016 Thin-layer heap bioleaching of copper flotation tailings containing high levels of fine grains was carried out by mixed cultures on a small scale over a period of 210 d. Lump ores as a framework were loaded at the bottom of the ore heap. The overall copper leaching rates of tailings and lump ores were 57.10wt% and 65.52wt%, respectively. The dynamic shifts of microbial community …
The paste thickener could increase the water recovery and reduce the environmental impacts in tailings dam. The present work aimed to find the appropriate scale-up factor for bed depth to design paste thickener for copper tailings, using a lab glass cylinder and an operating pilot column. The thickening tests were carried out on the flotation tailing samples obtained from the Sarcheshmeh and ...
Jan 28, 2016 CaCO3-rich marble cutting waste is a residual material produced by the cutting and polishing of marble stone. In this study, the feasibility of using the marble cutting waste as an acid-neutralizing agent to inhibit AMD and immobilize heavy metals from copper flotation tailings (sulfide- bearing wastes) was investigated.
Aug 01, 2018 A processing plant in Chile has been reprocessing copper flotation tailings from two historic and one fresh tailings dams since 1992. The grade ranges from 0.12% Cu for the fresh tailings to 0.27% Cu for the historic tailings.
Apr 18, 2018 copper oxides, mainly the combination copper oxide, were not thoroughly recycled and the majority were lost in the tailings. As is typical for flotation tailings containing silicate gangue minerals, high temperature leaching was used [12]. The copper mineral composition and chemical composition of the flotation tailings were analyzed
Sep 01, 2019 The concentration of sulfide copper minerals by means of flotation generates large volumes of tailings. It is estimated that one hundred twenty-five tons of tailings are generated per one ton of produced copper, and its generation is on a continuous rise because of the decrease of the copper …
Apr 13, 2016 Copper Flotation Reagents Lime is usually added to the ball mill feed by a Dry Reagent Feeder. The frother and promoter are added in the classifier prior to flotation to realize the full effect of the reagent. Reagents can also be stage- added to the cells in the flotation circuit.
May 16, 2016 After the rougher flotation concentrate is reground it is cleaned twice in additional “Free-Flow” Flotation Machines with the recleaned concentrate going to final concentrate filtration or, as the metallurgy dictates, to a copper-moly separation circuit. The tailings or middlings from the flotation cleaning circuit can either go to a cleaner – scavenger circuit as shown on the flowsheet or can be returned to the original rougher flotation …
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