Enhanced flotation separation of phosphate and dolomite using a new amphoteric collector

Shao, X.; Jiang, Chengliang; Parekh, B.K.

doi:10.1007/bf03402791

Cited by 10 publications

(10 citation statements)

References 2 publications

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“…Their flotation selectivity is relatively high over a wide pH range and negligibly influenced by the dissolved species and temperature. It is reported that a phosphate concentrate assaying above 32% of P 2 O 5 with a recovery around 90% can be obtained from a mixture of pure phosphate and dolomite minerals when using dodecyl-N-carboxyethyl-N-hydroxyethyl-imidazoline as the collector [71,72]. The separation of dolomite from Abu-Tartur phosphate ore using a similar amphoteric collector was conducted by Elmahdy et al [73].…”

Section: (3) Amphoteric Collectorsmentioning

confidence: 99%

Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

2019

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Phosphate ore is an important raw material for manufacturing fertilizers and phosphorous chemical products. While most of the phosphate resources cannot be directly treated as feed stock due to the low grade of P2O5 and high content of impurities. In order to obtain a qualified phosphate concentrate, the beneficiation of the low-grade phosphate ore is, hence, of great necessity. Many beneficiation techniques can be employed to upgrade the P2O5 grade of phosphate ores based on their characteristics in chemical composition and texture. The flotation process is most widely applied to balance the P2O5 recovery ratio and cost. In this review, the dominant techniques for the beneficiation of phosphate ores are introduced. Moreover, the factors that affect the flotation of phosphate ore, including the properties of mineralogy, flotation reagents (depressants and collectors) and flotation medium, were systematically analyzed.

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Section: (3) Amphoteric Collectorsmentioning

confidence: 99%

Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

2019

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“…In view of the flotation separation of carbonate minerals in sedimentary phosphate ore, a lot of researches on flotation methods, flotation reagents, flotation influencing factors and mechanism have been carried out. For instance, using double reverse flotation [13,14], ultrasound irradiation-reverse flotation methods [8] to separate carbonates and phosphates; taking phosphoric acid (H 3 PO 4 ) [5] or citric acid (H 3 Cit) [15] as flotation depressant; developing new flotation collectors [16,17].…”

Section: Introductionmentioning

confidence: 99%

Occurrence of Sesquioxide in a Mid-Low Grade Collophane-Sedimentary Apatite Ore from Guizhou, China

Deng

Zhang

et al. 2020

Minerals

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Checking the presence of sesquioxide (Fe2O3, Al2O3) is helpful for its removal in advance. Therefore, the occurrence of sesquioxide in a mid-low grade calcareous-siliceous collophane ore (massive carbonate-apatite, also known as francolite) from Guizhou, China was determined by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), field emission scanning electron microscope-energy dispersive X-ray spectrometry (FESEM-EDX) and Mineral Liberation Analyzer (MLA). The results show that iron mainly occurs as pyrite FeS2, goethite FeO(OH) and as substitution within dolomite Ca(Mg,Fe)(CO3)2, while aluminum is enriched in muscovite KAl2(AlSi3O10)(OH)2 and also found in apatite (F,CO3)CaPO4 and calcite CaCO3 due to isomorphism or adsorption. All these minerals are fine-grained, among which pyrite and goethite tend to be enriched in larger particles. Intergrowth is predominant in the six minerals’ locking. Pyrite is mainly intergrown with calcite, biotite and also included in apatite and muscovite, while the monomer pyrite appears as semi-automorphic fine grain with the liberation of 56.1%. Apatite particles are mainly intergrown with quartz and calcite. Most of goethite, dolomite, muscovite and calcite form intergrowth with apatite, with contents of 21.7%, 11.1%, 19.5% and 41%, respectively. The removal of pyrite, goethite, dolomite, muscovite and calcite in the ore is the key to reduce the contents of Fe2O3 and Al2O3. In the subsequent beneficiation, the ore must be fully ground. In addition to flotation, magnetic separation can also be considered to remove part of iron in ore. For the removal of aluminum from apatite, leaching method can be considered.

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“…Capturing such gas at the dolomite surface via a coating agent will create a density difference and leads to dolomite flotation. The difference in the tendency to acids overcomes the similarity of surface properties of apatite and dolomite as a barrier for conventional separation techniques [7][8][9][10][11]. A schematic illustration of bubble formation during the reaction and the particle density change are given in Fig.…”

Section: Introductionmentioning

confidence: 99%