Improving flotation of low-grade phosphate ore by attrition

Strains of Acidithiobacillus ferrooxidans (At.f) were separated and purified from water sample collected from a hot spring and bioleaching a low grade phosphate ore. The results indicated that bioleaching phosphorus rate increasing sharply was starting at the ending of pH value decreasing, and ascend velocity had slowed down after linear regression of pH was at its second peak. In the environment of ultraviolet mutagenesis, the initial growth of At.f (r) was decreased by illumination time increased, but the maximum rate of bioleaching phosphate ore (ηm) was increased. In the condition of ultrasonic vibration, r was increased by vibration time added, and ηm was almost increased, except 20 min, owing to the modificatory coefficient was large enough. In circumstances of low temperature treatment, r was decreased by treatment time raised; ηm was more increase than the sample of un-treatment (CK).

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Research on Enrichment of P2O5 from Low-Grade Carbonaceous Phosphate Ore via Organic Acid Solution

Journal of Analytical Methods in Chemistry ◽

10.1155/2019/9859580 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Fei Xie ◽

Jie Zhang ◽

Jiyan Chen ◽

Jianrui Wang ◽

Lin Wu

Keyword(s):

Organic Acid ◽

Reaction Times ◽

Acid Leaching ◽

Gangue Mineral ◽

Low Grade ◽

Reaction Conditions ◽

Phosphate Ore ◽

Orthogonal Experiments ◽

Different Types ◽

Acid Acid

The theory of using dilute organic acid solutions to leach the carbonaceous part from low-grade carbonaceous phosphate ore has been proposed by researchers as an effective approach to increase the proportion of P and to utilize the abundant low-grade resource. In this paper, a comprehensive experimental study was carried out to confirm the feasibility of organic acid leaching and investigate the optimized leaching conditions. Utilizing the low-grade carbonaceous phosphate ore produced in Zhijin, southwest of China, the effects of different types of acid, acid concentrations, reaction temperatures, reaction times, and liquid-solid ratios on leaching rate of P2O5 were evaluated using single-factor experiments and orthogonal experiments. The reaction mechanism, examined by SEM technique and the reaction thermodynamic analysis suggested that the leaching of P2O5 mainly resulted from the process of dissolution of dolomite (the main gangue mineral) in organic acid, consequently enriching the phosphate rock (the mineral of value). The effectiveness and impacts of different types of acid and reaction conditions were also studied. To conclude, this study first confirmed the viability of enriching P2O5 from low-grade ores through organic acid leaching the carbonaceous part by experimental data, and the experimental results will provide an essential scientific support for further upgrade of the technology to commercial scale utilization.

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The Beneficiation Processes of Low-Grade Sedimentary Phosphates of Tozeur-Nefta Deposit (Gafsa-Metlaoui Basin: South of Tunisia)

Minerals ◽

10.3390/min9010002 ◽

2018 ◽

Vol 9 (1) ◽

pp. 2 ◽

Cited By ~ 4

Author(s):

Haïfa Boujlel ◽

Ghassen Daldoul ◽

Haïfa Tlil ◽

Radhia Souissi ◽

Noureddine Chebbi ◽

...

Keyword(s):

Chemical Analysis ◽

Microscopic Observation ◽

Recovery Rate ◽

Coarse Fraction ◽

Low Grade ◽

Reverse Flotation ◽

Chemical Analyses ◽

Phosphate Ore ◽

Carbonate Fluorapatite

The enrichment of the low-grade-phosphate ore of the Tozeur-Nefta deposit was investigated using scrubbing-attrition, ball grinding and anionic/cationic reverse flotation in order to separate phosphate-rich particles from their gangue. The choice of the beneficiation process was based on the petrographic, mineralogical and chemical analyses. The petrographic and mineralogical studies have revealed the abundance of phosphatic (carbonate-fluorapatite-CFA) particles) coupled with carbonates (calcite, dolomite,) and silicates (quartz, illite, kaolonite) that constitute the (endo/exo) gangue of these ores. Chemical analysis has demonstrated that the raw phosphate sample contains low amounts of P2O5 (12.0%) and MgO (4.9%) and high amounts of CaO (40.7%) and SiO2 (20.5%). Microscopic observation/counting has shown that the release mesh occurs in the 71–315 μm size. Scrubbing-attrition, grinding and reverse flotation methods were applied to the +71μm fraction. Scrubbing-attrition tests of the 71–315 μm fraction have helped to improve the P2O5 grade to 15.5%. Ball-grinding tests were used to reduce the coarse fraction +315 μm. Grounded materials were sieved to 71–315 μm and combined with the scrubbed fraction in the flotation feed. Reverse-flotation tests of the phosphate-rich fraction (71–315 μm) have helped to improve the P2O5 grade to 27.1%, with a recovery rate of 92.4%.

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Flotation of low-grade phosphate ore

Advanced Powder Technology ◽

10.1163/1568552041270491 ◽

2004 ◽

Vol 15 (4) ◽

pp. 421-433 ◽

Cited By ~ 12

Author(s):

F. Hernáinz ◽

M. Calero ◽

G. Blázquez

Keyword(s):

Low Grade ◽

Phosphate Ore

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Review on Beneficiation Techniques and Reagents Used for Phosphate Ores

Minerals ◽

10.3390/min9040253 ◽

2019 ◽

Vol 9 (4) ◽

pp. 253 ◽

Cited By ~ 16

Author(s):

Ruan ◽

He ◽

Chi

Keyword(s):

Raw Material ◽

Low Grade ◽

Recovery Ratio ◽

Flotation Reagents ◽

Flotation Process ◽

Phosphate Ore ◽

Feed Stock ◽

Chemical Products ◽

Phosphate Ores ◽

Phosphate Concentrate

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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Beneficiation of a Low-grade Phosphate Ore Using a Reverse Flotation Technique

Mineral Processing and Extractive Metallurgy Review ◽

10.1080/08827508.2020.1806834 ◽

2020 ◽

pp. 1-6

Author(s):

Tatiana Aleksandrova ◽

Abdalla Elbendari ◽

Nadezhda Nikolaeva

Keyword(s):

Low Grade ◽

Reverse Flotation ◽

Phosphate Ore ◽

Flotation Technique

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Application of Reagent JZQ - F7 Prepared with Catering Waste Oil to the Low Grade Phosphate Rock Flotation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.699.11 ◽

2013 ◽

Vol 699 ◽

pp. 11-16

Author(s):

Hua Jun Wang ◽

Ai Fei Yi ◽

Hui Mei Yu

Keyword(s):

Fatty Acids ◽

Phosphate Rock ◽

High Selectivity ◽

Environmentally Friendly ◽

Low Grade ◽

Waste Oil ◽

Solubility In Water ◽

Phosphate Ore ◽

Good Solubility

Mixed fatty acids collector (JZQ - F7) prepared with catering waste oil applying for recovery of low grade phosphate rock is studied. Research shows that the environmentally friendly collector JZQ - F7 has high selectivity for phosphate ore with good solubility in water. The reagent could upgrade the ore P2O5 content from 2.57% of the run-of-mine to 32.25% of that after a rough and two clean flotation processes with Na2CO3 dosage of 2.1 kg/t, Na2SiO3.9H2O dosage of 2.7 kg/t, JZQ - F7 dosage of 0.7 kg/t. The mesh of grind is 30% minus 200 mesh, and plus 40 mesh (0.45 mm) sizing product is discarded.

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