Physical and thermal treatment of phosphate ores — An overview

Abouzeid, Abdel-Zaher M.

doi:10.1016/j.minpro.2007.09.001

Cited by 273 publications

(138 citation statements)

References 28 publications

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“…To meet the needs of the agricultural sector to produce phosphate and chemical fertilizers, several methods have been proposed for mining based on the characteristics and depth of phosphate ore [4]. Similarly, to concentrate low-grade phosphate ore to a marketable grade (~30% P2O5) [5] several pre-processing and processing methods are defined [1,6,7]. These are based on the ore type, associated gangue minerals and the amount of impurities, as well as factors such as the degree of liberation of apatite minerals, the cost of the beneficiation method [1,6].…”

Section: Phosphate Productionmentioning

confidence: 99%

“…Similarly, to concentrate low-grade phosphate ore to a marketable grade (~30% P2O5) [5] several pre-processing and processing methods are defined [1,6,7]. These are based on the ore type, associated gangue minerals and the amount of impurities, as well as factors such as the degree of liberation of apatite minerals, the cost of the beneficiation method [1,6]. The methods employed include gravity separation [6], magnetic separation [8][9][10], electrostatic separation [11][12][13][14], size reduction, screening [15], attrition, scrubbing, classification [7], heavy media separation [16], calcination [17], acidic leaching [18][19][20], direct flotation [21][22][23][24], reverse flotation [25,26] or the use of multiple methods.…”

Section: Phosphate Productionmentioning

confidence: 99%

“…These are based on the ore type, associated gangue minerals and the amount of impurities, as well as factors such as the degree of liberation of apatite minerals, the cost of the beneficiation method [1,6]. The methods employed include gravity separation [6], magnetic separation [8][9][10], electrostatic separation [11][12][13][14], size reduction, screening [15], attrition, scrubbing, classification [7], heavy media separation [16], calcination [17], acidic leaching [18][19][20], direct flotation [21][22][23][24], reverse flotation [25,26] or the use of multiple methods. Sedimentary rocks have various chemical and mineralogical compositions in the gangue phase [16] and, therefore, based on the major associated minerals, the Lar phosphate deposit of southwest Iran is classified as a calcareous ore of sedimentary origin.…”

Section: Phosphate Productionmentioning

confidence: 99%

“…Sedimentary rocks have various chemical and mineralogical compositions in the gangue phase [16] and, therefore, based on the major associated minerals, the Lar phosphate deposit of southwest Iran is classified as a calcareous ore of sedimentary origin. In terms of processing, conventional techniques such as flotation and physical separation are difficult to remove the carbonate minerals from such ores (because of the similarity in physical properties of carbonates and phosphates) [6] and Calcination is another solution for upgrading these difficult-to-treat types of ores. Beneficiation by calcination is one of the better known processes which has been proposed in the past to treat carbonate-bearing sedimentary phosphate ores [27].…”

Section: Phosphate Productionmentioning

confidence: 99%

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Beneficiation of Low-Grade Phosphate Deposits by a Combination of Calcination and Shaking Tables: Southwest Iran

2015

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Three quarters of the world's phosphate deposits are of sedimentary origin and 75%-80% of those include carbonate gangue. In this study, carbonate sedimentary phosphate deposits of the Lar Mountains of southwest Iran are studied. These deposits consist mainly of calcite, fluorapatite, quartz, kaolinite and illite, with an average P2O5 grade of 9%-10% (low-grade). Various pre-processing and processing methods have been developed for concentrating low-grade phosphate up to marketable grade and this study aims to select the optimal method to produce an economically viable grade of phosphate concentrate from low-grade ore. Different concentration methods, including calcination and gravity separation, were applied on samples at both a laboratory and semi-industrial scale (pilot scale). Using an integrated method of calcination (performed in a rotary kiln) and shaking table for concentrating the low-grade phosphate ore, the results show promise at producing grades of 30.77% P2O5 with 60.7%-63.2% recovery. OPEN ACCESSMinerals 2015, 5 368

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Section: Phosphate Productionmentioning

confidence: 99%

Section: Phosphate Productionmentioning

confidence: 99%

Section: Phosphate Productionmentioning

confidence: 99%

Section: Phosphate Productionmentioning

confidence: 99%

See 2 more Smart Citations

Beneficiation of Low-Grade Phosphate Deposits by a Combination of Calcination and Shaking Tables: Southwest Iran

2015

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“…(acima de 25%) e poucos minerais de ganga ou minerais de remoção mais fácil, como carbonatos e argilas (Abouzeid, 2008;Gharabaghi et. al 2010).…”

Section: -O Fósforo Como Recursounclassified

Fertilizantes organo-fosfatados produzidos pelo processo Humifert: estudo das transformações e caracterização dos produtos

Silverol¹

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Ao meu marido, Rubens, por mostrar que a vida e a felicidade são muito além do que eu poderia imaginar e sonhar para mim.Ao CNPq, pela concessão de bolsa de doutorado.A CAPES, pela concessão da bolsa de doutorado sanduíche.A FAPESP, pelo apoio a este projeto através do processo 03/06545-7 e 2008/50057-0.A Lincoln University, Canterbury, Nova Zelândia, por toda a infra-estrutura colocada a disposição para a realização de parte dessa tese. À empresa Galvani S.A. e ao CETEM/MCT pelo acesso à área e obtenção do minério fosfático de Angico dos Dias (BA). 6Resumo O processo Humifert de produção de fertilizantes pode constituir-se em uma nova alternativa de aproveitamento desses materiais, pois fabrica compostos a partir de minérios inadequados aos processos industriais atualmente em uso, e ainda utiliza material orgânico, favorecendo e ampliando o uso de resíduos orgânicos. Além disso, os compostos organofosfatados podem apresentar características mais apropriadas ao clima tropical, com liberação mais lenta de P 2 O 5 e ainda, acrescentando matéria orgânica nos solos, melhorando suas características físico-químicas e possibilitando um aumento de produtividade.Assim, os objetivos principais desta tese foram a (1) fabricação de fertilizantes organofosfatados a partir do minério fosfático de Angico dos Dias, (BA) e de dois tipos de lodo de esgoto doméstico (biossólido) antes e depois das alterações realizadas no reator, para avaliar se as mudanças promoveram modificações nos compostos; e a (2) caracterização dos compostos obtidos por métodos químicos (pH, Análise Elementar, Fracionamento Seqüencial do P e Solubilidade do P); mineralógicos (DRX, MEV/EDS e TG); e espectroscópicos (FTIR, FIL e RPE).Os resultados obtidos indicaram que as alterações realizadas no reator promoveram significativas mudanças nas características químicas dos compostos, especialmente na solubilidade do P. A caracterização dos compostos Humifert mostrou que o processo foi capaz de modificar tanto a rocha fosfática quanto a matéria orgânica, transformando as formas menos solúveis presentes nesses materiais para formas mais solúveis. A disponibilização do P da rocha fosfática e a possível formação de humic-like substances devido à degradação da matéria orgânica promovida pelo ataque ácido permitiram a formação de complexos humato -fosfato, que resultaram na precipitação de brushite-like. 7 AbstractThe Humifert process has been to improve utilization of phosphatic rocks considered by manufactures as low-grade ore. In addition, this process utilizes organic waste such as biosolid to create an organic phosphate compound. The Humifert process involves reacting phosphate rock with organic waste in a bench reactor, with nitric acid that is just generated when nitric oxides come into the mixture (Sternicha 1980;Silverol et al. 2007). The apatite grains from the phosphatic rock are partially dissolved, releasing PO 4 3-, which can associate with organic phases present or transformed during the nitric reactions. Then, organic phosphatic compounds are generated...

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Challenges Related to the Flotation Process of Complex Phosphate Ores

Willie,

Hlahane

2024

Recovery of Values From Low‐Grade and Complex Minerals

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Physical and thermal treatment of phosphate ores — An overview

Cited by 273 publications

References 28 publications

Beneficiation of Low-Grade Phosphate Deposits by a Combination of Calcination and Shaking Tables: Southwest Iran

Beneficiation of Low-Grade Phosphate Deposits by a Combination of Calcination and Shaking Tables: Southwest Iran

Fertilizantes organo-fosfatados produzidos pelo processo Humifert: estudo das transformações e caracterização dos produtos

Challenges Related to the Flotation Process of Complex Phosphate Ores

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