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(PDF) In situ and Dump Leaching of Phosphate

This new concept opens the way to the possibility of treating phosphate rock by in-situ, dump, or vat leaching for the recovery of phosphate values as well as

Rigid-Flexible Combined Impeller Enhancement in

2021-12-7  Conventional rigid impellers are frequently used in the leaching process of phosphate rock, which often form a symmetrical flow field in the reactor, leading to a reduction in the leaching efficiency. In this work, a rigid-flexible combined impeller was applied to the leaching process of phosphate rock to increase the leaching efficiency. The effects of the reaction temperature (T),

Release behavior of iodine during leaching and calcination

A series of experiments of column leaching under different pHs (pH 1.8, 3.8, 6.5, and 8.5) and calcination at different temperatures (200-1100 °C) were carried out for evaluation of release behavior of iodine in phosphate rock. The modes of occurrence of iodine in the phosphate rock and its leaching

Bioleaching of soluble phosphorus from rock phosphate

Bioleaching of soluble phosphorus from rock phosphate containing pyrite with DES-induced Acidithiobacillus ferrooxidans Correspondingly,the highest leaching rate of soluble P is also obtained to be 14.9% by the At. f mutated,which is 85.8% higher than that

Rare Earth and Phosphorus Leaching from a Flotation

2018-9-19  Phosphorite, or phosphate rock, is the raw material of phosphoric acid production. It has also been regarded as the most important secondary rare earth element (REE) resource due to low contents of rare earth elements contained in the ore. In Florida, there is about 19 Mt of phosphate rock mined annually. After beneficiation, the phosphate rock concentrate is utilized

Effect of Hydrochloric Acid on Leaching Behavior of

2022-1-13  During beneficiation of phosphate rocks, huge amounts of oversize phosphate rocks are rejected from crushers. This reject also mostly contains low tricalcium phosphate and high carbonate content. In this study, experiments have been carried out to reduce/eliminate carbonate content by leaching the ground phosphate rock with dilute

Containing Rare Earth Phosphate Rock

The reserve of sedimentary phosphate deposits in Guizhou province in western China is huge, but has been no development because of its difficulties of

Efficient extraction of phosphate from dephosphorization

The leaching efficiency of P reached 96.8% without Fe dissolution. • The Fe 2 O 3-rich residue can be reused as a metallurgical feedstock.. A precipitate containing 35.1% P 2 O 5 was recovered from the leachate.. An efficient method for phosphate recovery from slag was provided.

(PDF) Leaching Kinetics of Rare Earth Elements

2021-2-1  Phosphate rock has been considered as one of the most significant secondary rare-earth resource, and the utilization of rare earth elements (REEs) in phosphate rock has attracted increasing attention.

Rare Earth and Phosphorus Leaching from a Flotation

2018-9-19  Phosphorite, or phosphate rock, is the raw material of phosphoric acid production. It has also been regarded as the most important secondary rare earth element (REE) resource due to low contents of rare earth elements contained in the ore. In Florida, there is about 19 Mt of phosphate rock mined annually. After beneficiation, the phosphate rock concentrate is utilized

Release behavior of iodine during leaching and calcination

2021-2-17  The phosphate rock contains a small amount of Fe-Mn oxide-bound and water soluble iodine, while the measurement of XRF shows that it contains a large amount of Fe 2 O 3, which indicates that there is a certain degree of negative correlation between iodine and Fe 2 O 3. Leaching behavior of iodine in phosphate rock

Metals Free Full-Text Leaching Kinetics of Rare Earth

2021-2-1  Phosphate rock has been considered as one of the most significant secondary rare-earth resource, and the utilization of rare earth elements (REEs) in phosphate rock has attracted increasing attention. In this study, the leaching kinetics of REEs from a phosphate ore from China was studied with the variation of temperature and phosphoric acid concentration under the

Bioleaching of soluble phosphorus from rock phosphate

Bioleaching of soluble phosphorus from rock phosphate containing pyrite with DES-induced Acidithiobacillus ferrooxidans Correspondingly,the highest leaching rate of soluble P is also obtained to be 14.9% by the At. f mutated,which is 85.8% higher than that

A new palaeo-weathering and leaching model for the

2021-11-2  The Kaiyang phosphate deposit in Guizhou Province of China is high-grade (P 2 O 5 > 30%) and ultra-large (>1.31 billion tons of resources) and represents a world-class marine phosphorite deposit. The deposit has been the focus of many studies, including stratigraphic and sequence stratigraphy research that divided the sedimentary units in the Huang Nigou area,

Hydrochloric Acid Leaching Study of Rare Earth

2019-8-7  As part of the valorization of the Moroccan phosphate rock by extraction of rare earths, different experiments on natural Moroccan phosphate from the Gantour Basin (basin of phosphate in the Youssoufia area) were

Containing Rare Earth Phosphate Rock

The reserve of sedimentary phosphate deposits in Guizhou province in western China is huge, but has been no development because of its difficulties of comprehensive utilization. Using mineral processing techniques, Rare earth

Dolomite phosphate rock (DPR) application in acidic sandy

2012-11-24  A column leaching study was designed to investigate the leaching potential of phosphorus (P) and heavy metals from acidic sandy soils applied with dolomite phosphate rock (DPR) fertilizers containing varying amounts of DPR material and N-Viro soils. DPR fertilizers were made from DPR materials mixing with N-Viro soils at the ratios of 30, 40, 50, 60, and 70

磷酸岩_百度百科

磷酸岩多产于沉积岩,也有产于变质岩和火成岩,除个别情况外,矿物中的磷总是以正磷酸盐形态存在,磷的主要矿物为磷灰石。磷是重要的化工原料,也是农作物生长的必要元素,工业用磷必须大量从磷矿中提取,用于制造黄磷、赤磷、磷酸、磷肥、磷酸盐。英文名为PHOSPHATE ROCK 。分子式:3Ca3(PO4

Phosphate rock bioleaching Semantic Scholar

Five different mixtures of pyritiferous concentrate and phosphate rock, in different proportions, were used in adequate liquid culture media, and phosphate solubilization ranged from 12% to 100% when 9K nutrients medium was used and from12% to 89% when medium contained only 3.0g/l ammonium sulphate. SummaryMicrobiological acid solutions produced byThiobacillus

Rare-earth leaching from Florida phosphate rock in wet

2017-8-1  @article{osti_1394450, title = {Rare-earth leaching from Florida phosphate rock in wet-process phosphoric acid production}, author = {Liang, Haijun and Zhang, Patrick and Jin, Zhen and DePaoli, D.}, abstractNote = {Phosphorite, or phosphate rock, is the most significant secondary rare-earth resource. It contains high amounts of phosphate-bearing minerals along

Selective Leaching Kinetics of Calcareous

Selective Leaching Kinetics of Calcareous Phosphate Rock in Phosphoric Acid. In the present study, reaction kinetics was carried out using low grade calcareous phosphate rock particles in dilute phosphoric solution. To study the reaction

Rock phosphates are poor fertilizers for non-leaching

2020-10-13  the effectiveness of rock phosphate decreases as more is applied. More of the rock phosphate is dissolved at the lower levels of application and the fertilizer is more effective for supply­ ing phosphorus to plants. For example, in a field experiment at New Norcia, about 350 kg/ha of phosphorus as Queensland rock phosphate and 20 kg/ha of

PAPER OPEN ACCESS Direct leaching of rare earth

phosphate rock before wet phosphoric acid production or direct phosphate rock application on agricultural soils. The main idea of this new approach is

Rock phosphates are poor fertilizers for non-leaching

mostly crandallite-millisite rock phosphates, such as the C-grade ore on Christmas Island, At low levels of application about 3 to 10 times as which cannot be used to make fertilizers such much rock phosphate phosphorus urns needed to as superphosphate or DAP, but are heated produce the same increment in yield as that from (calcined) at about

Method for ION exchange based leaching of the

The treated phosphate rock is removed from the process as a finished product, thus completing the phosphate rock leaching loop. The ion exchange resin, loaded with predominantly calcium and magnesium, is transferred to the first regeneration chamber (unit 13) where ammonium nitrate solution, preferably of a concentration between 160-320 g/l, is

Use of dolomite phosphate rock (DPR) fertilizers to

2013-4-1  Laboratory column leaching experiments were conducted to evaluate P leaching from a typical acidic sandy soil in Florida amended with DPR fertilizers developed from dolomite phosphate rock (DPR) and N-Viro soil. Ten leaching events were carried out at an interval of 7 days, with a total leaching volume of 1183 mm equivalent to the mean annual

耐铅解磷真菌联合磷矿粉钝化修复重金属铅-《厦门大学学报

2021-7-12  Soluble phosphate released by phosphate-solubilizing fungi(PSF)from phosphate rock is the pivotal factor in lead [10] PARK J H,BOLAN N,HARAJ M,et al.Comparative value of phosphate sources on the immobilization of lead,and leaching of lead and

Chemical Beneficiation of Phosphate Rock E & MJ

2020-4-8  The reaction of monocalcium phosphate with ammonia: The reaction of calcium nitrate with ammonia: Summary. Dilute nitric acid [20%] or dilute hydrochloric acid [10%] can be used to one’s advantage for leaching phosphate rock. This permits the use of standard hydrometallurgical processes such as in situ, vat and heap leaching.