DAF–dissolved air flotation: Potential applications in the mining and mineral processing industry

Rodrigues, Rafael Teixeira; Rubio, J.

doi:10.1016/j.minpro.2006.07.019

Cited by 180 publications

(65 citation statements)

References 27 publications

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“…And it is a hot topic to reduce the entrainment of gangue in clean coal by reducing the bubble size and by hydrophobic flocculation flotation and physical chemistry methods. DAF [38], IDF [39] and electroplating [40] are the common microbubble flotation methods. The application of these three methods are limited to the treatment of polluted water and the recovery of soluble metal salt so far and few reports on mineral processing.…”

Section: Other Methodsmentioning

confidence: 99%

Review of Reducing Entrainment of High Ash Fine Slime to Concentrate in Flotation Process

Wang¹,

Wang²

2017

dteees

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Abstract. High concentrate ash caused by entrainment of high ash fine slime is a common technical problem in fine coal slime separation. This paper reviews the methods of reducing high ash fine slime entrainment in flotation process from the respects of flotation process, flotation reagent, flotation equipment and new methods, aims to provide direction and guidance for finding a suitable and effective measure to fundamentally reduce or even avoid the entrainment of high ash fine slime to concentrate in flotation process and achieving highest recovery of concentrate.

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Section: Other Methodsmentioning

confidence: 99%

Review of Reducing Entrainment of High Ash Fine Slime to Concentrate in Flotation Process

Wang¹,

Wang²

2017

dteees

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“…After the treatment, oil concentration has been found slightly above the targeted level for industrial wastewaters (50 mg/L) safe release to the environment. The generic principle of dissolved air flotation (DAF), which lies in the generation of microbubbles from gas-saturated pulp/effluent, has been employed for contaminants removal from process waters during their reclamation (Otadi et al 2011;Rodrigues and Rubio 2007;Shammas et al 2010). The contaminants being concentrated in the froth fraction are subsequently skimmed away.…”

Section: Physicochemical Treatment (Flotation)mentioning

confidence: 99%

Bio-treatment and water reuse as feasible treatment approaches for improving wastewater management during flotation of copper ores

Lutandula⃰

Mutiti

2016

Int. J. Environ. Sci. Technol.

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Established and emerging technologies for treatment of flotation wastewaters are compared and discussed in the context of their applicability during the management of wastewaters from Cu-Co ores processing through flotation in the Katanga province of the Democratic Republic of Congo. The effects from water recycling on water quality and flotation performance are briefly presented in parallel. The ore processing schemes and the wastewater management practices at two operational concentrators are illustrated as study cases and their peculiarities outlined. A reference to a copper concentrator in a nearby Zambia is addressed for comparative purpose. Based on analysis of the findings, the clarification, biotreatment inside the tailing ponds or the use of constructed wetlands as polishing stage prior to water reuse are suggested as feasible treatment approaches in view improving the management practice of flotation wastewaters during the dressing of copper ores in the Katanga province.

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“…The mechanism of a flotation process is fundamentally the generation of small bubbles which can be achieved chemically, by direct addition of gas through porous dispersers [2], by electrolysis [3], through mechanical agitation combined with air injection [4], by direct injection through sparger [5] or by dissolution of air to water through pressure [6], depending on the flotation technique adopted. Flotation exploits the physicochemical surface properties of a substance and has high selectivity of the desired recovery particle.…”

Section: Introductionmentioning

confidence: 99%

The Recovery of Oil from Oil/Sand Slurries in a Laboratory-Scale Flotation Cell

Lau¹,

Foo²,

Poh³

2013

IJESD

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Abstract-Oil/sand slurries are found abundantly particularly at petroleum refineries. The ability to recover oil from these oil/sand slurries is an added advantage to meet the increasing need in oil consumption. Thus, this research aims to investigate the effects of temperature and pH in the recovery of oil from oil/sand slurries using the flotation technique. The critical operating temperature and optimum pH condition are determined to be at 50 o C and pH 9 respectively, whereby the maximum average oil recovered is 63.2 wt%. Oil recovery is found to be favorable at elevated temperatures due to the reduced oil viscosity which facilitates the liberation of oil from oil sands. Under alkaline conditions, negative surface charge is increased, resulting in increased disjoining pressure between the oil and sand grains which led to the improved oil recovery. Thus, the flotation process provides a promising alternative to recover oil from oil/sand slurries.

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DAF–dissolved air flotation: Potential applications in the mining and mineral processing industry

Cited by 180 publications

References 27 publications

Review of Reducing Entrainment of High Ash Fine Slime to Concentrate in Flotation Process

Review of Reducing Entrainment of High Ash Fine Slime to Concentrate in Flotation Process

Bio-treatment and water reuse as feasible treatment approaches for improving wastewater management during flotation of copper ores

The Recovery of Oil from Oil/Sand Slurries in a Laboratory-Scale Flotation Cell

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