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 …

Beneficiation of phosphate ores containing carbonate gangue minerals such as calcite and dolomite is one of the toughest problems before mineral process engineers, whereas …

Flotation separation of dolomite from Jhamarkotra phosphorite ore deposit in India, has been achieved using the two-stage conditioning process. An alternate process using a proprietary reagent scheme has also shown considerable promise in removal of dolomitic impurities. Hallimond cell flotation of the 65 × 100 mesh size fraction using …

Reagents used in the flotation of phosphate ores: A critical review. DOI: 10.1016/S0892-6875 (03)00131-6. Authors: H. Sis. Inonu …

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, …

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 …

As high grade deposits of phosphate rock are being depleted day by day in the world, future sources will be derived from low grade rocks containing various impurities. Low grade phosphate rocks are not suitable for direct use in acidulation plants unless their tricalcium phosphate (TCP) content is increased to 70% or more, using conventional …

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 ...

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 …

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 …

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 ...

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. ...

Phosphate ore particles dissolution kinetics in hydrochloric acid based on a structure-related segmented model. Powder Technology 2021, 392, 141-149. ... Preparation of magnesium hydroxide from leachate of dolomitic phosphate ore with dilute waste acid from titanium dioxide production. Hydrometallurgy 2014, 142, 137-144.

Abstract. Low grade dolomitic phosphate rocks have no direct use and are rejected all over the world. Substantial amounts of such low grade phosphorites are found along with high grade ore in some areas of Hazara (Pakistan). In the method described, thermal beneficiation is carried out to see the effect of temperature, time and particle size ...

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 ...

magnesium phosphate ore samples containing 3.3% and 1.5% MgO. The test results showed that the surfactant DP could improve dolomite flotation at low dosages, and …

However, in the case of Abu Tartur phosphate, which contains a dominantly ferriferous–dolomitic gangue, another technique based on high intensity, or high gradient, magnetic separation, can be used to reduce the MgO content. ... R.E., 1979. Beneficiation of Phosphate Ore. International Mineral and Chemical Corp. of Northbrook, IL, U.S. Pat ...

The bulk of the world's phosphate reserves is located in sedimentary horizons that contain appreciable amounts of carbonate. During beneficiation of phosphate rocks, huge amounts of oversize phosphate rocks are rejected from crushers. This reject also mostly contains low tricalcium phosphate content and high carbonate content. In …

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 …

In our case of using H3PO4 alone a phosphate concentrate assaying 30.1% P2O5 (at P2O5 recovery of 75.3%) and 0.75% MgO was obtained from a feed material assaying 23% P2O5 and 3.77% MgO. The ...

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 ...

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.

In reverse fatty-acid anionic flotation, the depression of phosphate mineral with orthophosphoric acid produces satisfactory results for calcareous as well as dolomitic …

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 …

Separation of dolomite from phosphate is the most challenging problem in phosphate mineral processing. Over 50% of the future phosphate reserve in Florida contains too much dolomite to process using the current industry practice. The current phosphoric acid production practice requires less than 1% MgO in the 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 loss was obtained. Magnesium hydroxide was prepared by precipitation from the refined solution with ammonia as the precipitant and …

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 using 710 and 105 microns screens. The undersize material was discarded while the oversize fraction was crushed and ground, followed by desliming and screening using a …

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 …

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. …

Abstract. A three stage flotation scheme was employed to beneficiate a low grade, high dolomitic phosphate ore from Florida. The reagent scheme used, …

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 …

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 …

Separation of refractory rock phosphate (P 2 O 5 = 11.5%) from the Dalir area, Iran, containing quartz, calcite and other impurities, by calcination and flotation processes has been successfully used to upgrade the phosphate values. Petrographic studies of this ore showed that collophanite was the major phosphate mineral and the …

@article{Yang2014PreparationOM, title={Preparation of magnesium hydroxide from leachate of dolomitic phosphate ore with dilute waste acid from titanium dioxide production}, author={Xiong Yang and Bin Wu and Jia-wen Zhu and Fan Xianguo and Pingxiong Cai and Junsong Wen and Xiang Liu}, journal={Hydrometallurgy}, …

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 …

A three stage flotation scheme was employed to beneficiate a low grade, high dolomitic phosphate ore from Florida. The reagent scheme used, developed on the basis of our previous fundamental studies, consisted of oleic acid added as collector, mineral oil and ethoxylated sulfonate as co-collectors and 1, hydroxy ethylidene 1,1- diphosphonic …

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 ...

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 …

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 …

Phosphate Beneficiation Process. Large scale mining and processing of phosphate is essential for operating at a profit. In the Florida area, Phosphate Beneficiation by flotation unlocked the door to vast tonnages of ore which in the past could not be recovered by conventional washing methods which saved only the coarser pebble …