Reverse flotation : a novel process for the beneficiation of fine coal

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dc.contributor.advisorFranzidis, Jean-Paulen_ZA
dc.contributor.authorStonestreet, Paulen_ZA
dc.date.accessioned2016-09-28T19:06:19Z
dc.date.available2016-09-28T19:06:19Z
dc.date.issued1991en_ZA
dc.descriptionBibliography: pages 157-162.en_ZA
dc.description.abstractThe beneficiation of ultrafine coal by froth flotation is a widely used process, and its importance for the treatment of -0.1 mm coal has been appreciated of late in South African coal washing plants. A number of problems adversely affect the efficiency of this process, such as poor liberation, poor floatability, gangue entraiment/entrapment, and high mass recovery which can lead to throughput limitations in coal flotation equipment. Reverse coal flotation is a novel process which has been proposed to address three problems occurring in the conventional, "forward flotation" of coal, namely: high mass recovery, gangue entrainment and the variability of floatability of South African coals. In this process, the entire gangue fraction in the coal would. be floated in a single step process, with the clean coal product reporting as the tailings. To the author's knowledge, no_ such process has been investigated previously for coal flotation. In this thesis, a reverse flotation process for ultrafine coal beneficiation was developed from first principles. In order to obtain a clear understanding and interpretation of experimental flotation results, artificial feed mixtures consisting of blends of "pure" gangue and "pure" coal were used for a large section of the experimental testwork. Having established the technical viability of the process on these artificial mixtures, the flotation work was extended to four South African run-of-mine coals. The study comprised the selection of suitable reagents for reverse flotation and the evaluation of these reagents experimentally. Experimental testwork comprised batch adsorption tests, and flotation tests in a conventional, sub-aeration laboratory batch cell and in a laboratory column flotation cell. The process was evaluated in terms of coal recovery into the product and gangue removal in the waste stream, and its metallurgical performance was compared to conventional flotation using both the artificial feeds and r.o.m. coals.en_ZA
dc.identifier.apacitationStonestreet, P. (1991). <i>Reverse flotation : a novel process for the beneficiation of fine coal</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/21990en_ZA
dc.identifier.chicagocitationStonestreet, Paul. <i>"Reverse flotation : a novel process for the beneficiation of fine coal."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1991. http://hdl.handle.net/11427/21990en_ZA
dc.identifier.citationStonestreet, P. 1991. Reverse flotation : a novel process for the beneficiation of fine coal. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Stonestreet, Paul AB - The beneficiation of ultrafine coal by froth flotation is a widely used process, and its importance for the treatment of -0.1 mm coal has been appreciated of late in South African coal washing plants. A number of problems adversely affect the efficiency of this process, such as poor liberation, poor floatability, gangue entraiment/entrapment, and high mass recovery which can lead to throughput limitations in coal flotation equipment. Reverse coal flotation is a novel process which has been proposed to address three problems occurring in the conventional, "forward flotation" of coal, namely: high mass recovery, gangue entrainment and the variability of floatability of South African coals. In this process, the entire gangue fraction in the coal would. be floated in a single step process, with the clean coal product reporting as the tailings. To the author's knowledge, no_ such process has been investigated previously for coal flotation. In this thesis, a reverse flotation process for ultrafine coal beneficiation was developed from first principles. In order to obtain a clear understanding and interpretation of experimental flotation results, artificial feed mixtures consisting of blends of "pure" gangue and "pure" coal were used for a large section of the experimental testwork. Having established the technical viability of the process on these artificial mixtures, the flotation work was extended to four South African run-of-mine coals. The study comprised the selection of suitable reagents for reverse flotation and the evaluation of these reagents experimentally. Experimental testwork comprised batch adsorption tests, and flotation tests in a conventional, sub-aeration laboratory batch cell and in a laboratory column flotation cell. The process was evaluated in terms of coal recovery into the product and gangue removal in the waste stream, and its metallurgical performance was compared to conventional flotation using both the artificial feeds and r.o.m. coals. DA - 1991 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1991 T1 - Reverse flotation : a novel process for the beneficiation of fine coal TI - Reverse flotation : a novel process for the beneficiation of fine coal UR - http://hdl.handle.net/11427/21990 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21990
dc.identifier.vancouvercitationStonestreet P. Reverse flotation : a novel process for the beneficiation of fine coal. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21990en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleReverse flotation : a novel process for the beneficiation of fine coalen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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