Reagents used in the flotation of phosphate ores: A …
Reagents used in the flotation of phosphate ores: A critical review. DOI: 10.1016/S0892-6875 (03)00131-6. Authors: H. Sis. Inonu …
اقرأ أكثر
Upgrading of calcareous phosphate ores by flotation: Effect of ore …
El-Hamrawein ore sample, Red Sea Coast: it is a hard dolomitic phosphate sample. It contains carbonate apatite as the main phosphate mineral, and dolomite, silica and clays as the main associated minerals, with little amount of calcite. 2-East mahamid ore sample, Nile Valley, East Sebaeya, Aswan: it is a soft chalky, oyster. …
اقرأ أكثر
Reagents used in the flotation of phosphate ores: a critical …
Al Jalamid, Saudi Arabia, phosphate ore containing 40–50% carbonate, 8–10% organic matter, and 16–25% P 2 O 5 was treated by calcination at 850 °C for about 1 h, ... technical difficulties in calcining dolomitic phosphates, (3) the inferior quality properties of calcined product, and (4) high-energy consumption. ...
اقرأ أكثر
Two-stage reverse flotation process for removal of
Phosphate rock contains various gangue minerals including silicates and carbonates which need to be reduced in content in order to meet the requirements of the phosphate industry. Froth flotation has become an integral part of phosphate concentration process. In this study, double reverse flotation was applied to recover …
اقرأ أكثر
A new enrichment method of medium–low grade phosphate ore …
This paper proposes a new enrichment method of medium–low grade phosphate ore with high silicon content via nitric acid leaching, separation and re-precipitation in sequence. The nitric acid leaching and the precipitation of the leaching solution were investigated and the P2 O 5 recovery reached 99.82%. The phosphorus in …
اقرأ أكثر
Enrichment of abu-tartur phosphate ore wastes
The amenability of a dolomitic phosphate ore from Abu-Shegilla, Um El-Hueitat area (Red Sea phosphate) to upgrading by reverse anionic flotation was studied. The effect of the most important ...
اقرأ أكثر
Dolomite: A sedimentary rock known as dolostone or dolomite …
Dolomite, also known as " dolostone " and " dolomite rock," is a sedimentary rock composed primarily of the mineral dolomite, CaMg (CO 3) 2. Dolomite is found in sedimentary basins worldwide. It is thought to form by the postdepositional alteration of lime mud and limestone by magnesium-rich groundwater. Dolomite and limestone are very …
اقرأ أكثر
Preparation of magnesium hydroxide from leachate of dolomitic phosphate
Magnesium in the form of dolomite constitutes a main impurity in sedimentary phosphate ores. Due to depletion of high-grade phosphate ore, the unexploited reserves of phosphate rock tend to contain less phosphate and more dolomitic carbonate (Zheng et al., 2001). The low-grade ores need beneficiation to be fit for subsequent processing.
اقرأ أكثر
Optimization of flotation parameters for enhancement …
phosphate from low-grade dolomitic rock phosphate ore from Jhamarkotra, India G. v. Rao and Swati Mohanty Scientists, Regional Research Laboratory, Bhubaneswar, India Abstract Sedimentary dolomitic phosphate ores are difficult to treat by flotation, and high-grade phosphate concen trates with high recoveries are difficult to obtain.
اقرأ أكثر
Double reverse flotation of a very low grade sedimentary phosphate rock
In this study, reverse flotation was applied to recover phosphate from a very low grade (5.01% of P 2 O 5) sedimentary ore.Sodium silicate, starch, tannic acid, aluminum sulfate, (Na,K)Tartarat, sodium tripolyphosphate, H 3 PO 4, and H 2 SO 4 were used as phosphate mineral depressants in acidic and alkaline conditions. Oleic acid and …
اقرأ أكثر
Reverse flotation of sedimentary calcareous/dolomitic rock phosphate …
About 75% to 80% of the world's low-grade phosphate reserves are associated with carbonate gangue that is not amenable to treatment by the simple techniques of physical separation. The processing of sedimentary dolomitic/calcareous phosphate ore has numerous problems, including similar surface properties of the …
اقرأ أكثر
Reverse anionic flotation of dolomitic collophanite using …
2.1. Selected ore sample A phosphate mining enterprise in Guizhou, China, provided massive phosphorite. After mechanical crushing and grinding, raw ore powder with a particle size fraction of −75 μm was obtained, accounting for 57.90% of the total for flotation. Table 1 shows the chemical analysis results of raw ore products with
اقرأ أكثر
Minerals | Free Full-Text | Geochemical Characteristics of Dolomitic …
The primary phosphorite is a dolomitic phosphorite containing rare earth elements, which are naturally enriched by weathering, and its weathered ore has obvious residual enrichment, while the deposit was characterized by normal marine sedimentation and hydrothermal action. ... the weathered ore has obvious residual enrichment and the …
اقرأ أكثر
Investigation of decomposition of dolomite and
Introduction. Phosphate ore is an important mineral resource. The global phosphate ore resources are mainly distributed in Morocco and Western Sahara, China and Syria, with an average P 2 O 5 grade of 19.61% (Zhang et al., 2017). Phosphate ore reserves in China are ranked second in the world. 75.7% of the phosphate mines …
اقرأ أكثر
Minerals | Free Full-Text | Microdistribution and Mode of …
The REE-bearing phosphate ore body is strata-bound, ... It can be seen that, when the content of dolomitic cement in phosphate rock increases, the content of rare earth decreases. This indicates that REEs do not occur in dolomite. The siliceous components in the ore, on the one hand, contribute to the formation of clay minerals, …
اقرأ أكثر
Minerals | Free Full-Text | Geochemical …
The primary phosphorite is a dolomitic phosphorite containing rare earth elements, which are naturally enriched by weathering, and its weathered ore has obvious residual enrichment, while the deposit was …
اقرأ أكثر
Jhamarkotra phosphate ore processing plant
Beneficiation of phosphate ores containing carbonate gangue minerals such as calcite and dolomite is one of the toughest problems before mineral process engineers, whereas …
اقرأ أكثر
Beneficiation of a Sedimentary Phosphate Ore by a …
In China, direct-reverse flotation is proved to be applicable to most phosphate ores. However, because the ratio of froth product is generally high, current direct-reverse technology faces challenges in terms of high reagent consumptions and cost. A new gravity and flotation combined process has been developed for the recovery of …
اقرأ أكثر
Innovative process for beneficiation of dolomitic phosphate …
Processing the South Florida ore (containing sand, clays and dolomitic lime- stone gangue) required two steps of selective fatty acid flotation -- one for carbonate removal at pH 4 to 5 and the other for phosphate recovery from the 313 TABLE I Results of selective flotation of Asian dolomitic and dolomitic/calcareous/siliceous phosphate …
اقرأ أكثر
Reverse flotation of sedimentary …
In reverse fatty-acid anionic flotation, the depression of phosphate mineral with orthophosphoric acid produces satisfactory results for calcareous as well as dolomitic …
اقرأ أكثر
Surface Electrical Behaviors of Apatite, Dolomite, …
The valuable mineral, apatite, in phosphate ore has the same lattice ion, Ca 2+, as dolomite, which results in a significant effect on the selective flotation of apatite from …
اقرأ أكثر
Dolomite Mineral | Uses and Properties
Dolomite is a common rock-forming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg (CO 3) 2. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.
اقرأ أكثر
Enhancing selective calcite and dolomite flotation in …
Selective recovery of dolomite and calcite impurities in sedimentary phosphate ore. Fatty acids coupled with ethoxylated alcohols provided better flotation performance. Surface response methodology assisted in achieving satisfactory flotation …
اقرأ أكثر
Preparation of Magnesium Hydroxide from Leachate of Dolomitic Phosphate …
Xiong et al. (2014) extracted magnesium from dolomitic phosphate ore (7.67% MgO) with dilute waste acid. Operating under the optimum leaching conditions, a 98.31% recovery of Mg with 0.02% P 2 O 5 ...
اقرأ أكثر
Flotation of low-grade phosphate ore
A study has been conducted on the flotation concentration of sedimentary phosphorite from Sierra Espuña, in the province of Murcia (Spain), using a Denver D-12 mechanical subaeration cell. First, the mineral was pretreated through grinding, sorting and discarding slimes. The effect on flotation of pH, collector concentration, particle size and ...
اقرأ أكثر
Review of the Main Factors Affecting the Flotation of …
The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment …
اقرأ أكثر
Magnetic properties of the Bled El Hadba phosphate …
It is poor in phosphate elements and highly dolomitized; (b) the main, Central Unit (CU), which is characterized by a mean thickness of 16 m, is richer in phosphate but poor in dolomitic cement; (c) the Lower Unit (LU), 6 m thick, located in the lower part of the main productive ore deposit, is very poor in phosphates but very rich in dolomitic ...
اقرأ أكثر
Beneficiation of a High Dolomite Phosphate Ore …
Phosohate ore: High dolomitic phosphate ore was supplied by the Florida Institute of Phosphate Research (FIPR). The as-received ore sample was deslimed and screened …
اقرأ أكثر
Reverse flotation of sedimentary calcareous/dolomitic rock phosphate …
Key takeaway: 'Reverse anionic flotation shows promise for removing carbonates from sedimentary rock phosphate, offering an economically viable method for processing low-grade phosphate reserves.' ... Reverse flotation of sedimentary calcareous/dolomitic rock phosphate ore — an overview. M. Prasad, A. Majumder, T. Rao. Feb 1, 2000. Cite ...
اقرأ أكثر
Optimization of flotation parameters for enhancement of
Sedimentary dolomitic phosphate ores are difficult to treat by flotation, and high-grade phosphate concentrates with high recoveries are difficult to obtain. The literature indicates that the reagents required for beneficiation of such ores are generally dictated by the nature of the gangue. In this paper, the optimum flotation parameters …
اقرأ أكثر