removal of thorium from uranium ore

Removal of thorium and uranium from leach solutions of

2020-6-1  The removal of radioactive elements thorium and uranium from the leach solution of ion-adsorption rare earth ores by aluminum sulfate was studied using di(2-ethylhexyl) [N-(2-ethylhexyl)aminomethyl] phosphonate (Cextrant 230, L).The extraction of thorium, uranium, rare earths, aluminum and other elements was investigated in detail, especially for uranium.

Read More
(PDF) Hydrometallurgical removal of uranium and thorium ...

Mulugeta et al. focused on the leaching of uranium and thorium from a high-grade Ethiopian tantalite ore using sulphuric acid. The amount of uranium leached increased from 69.1% at a contact time ...

Read More
Separation of thorium from uranium ore SpringerLink

2019-12-7  Thorium-230 has many research applications, but there is not a commercial source of this isotope. However, since 230 Th is part of the 238 U decay chain, it can be separated from naturally occurring uranium. In this work, a novel procedure was developed to separate thorium from uranium ore, consisting of leaching, liquid–liquid extraction, precipitations and ion exchange chromatography.

Read More
[PDF] Hydrometallurgical removal of uranium and thorium ...

This study focused on the leaching of uranium and thorium from a high grade Ethiopian tantalite ore using sulfuric acid. The effects of variables such as acid concentration, temperature and leaching time were studied. In general, the leaching efficiency of uranium increases with increasing temperature from 100 to 300 °C whereas the opposite trend was observed for thorium.

Read More
Received April 13, 2018; reviewed; accepted July 13, 2018 ...

2020-9-4  Hydrometallurgical removal of uranium and thorium from Ethiopian tantalite ore Mulugeta Sisay Cheru 1, Alberto Velázquez del Rosario 2, Abubeker Yimam 3, Bogale Tadesse 4 and Goitom Gebreyohannes Berhe 5 1 School of Materials Science and Engineering, Jimma Institute of Technology, Jimma University, PO Box 378, Jimma, Ethiopia

Read More
Recovery of thorium from uranium solutions - NASA/ADS

At Elliot Lake, Ontario, thorium has been recovered from uranium ore leach solutions, after removal of the uranium by ion exchange resin, since 1959. A solvent extraction process is used, and the thorium is recovered as thorium sulfate by stripping the loaded solvent with moderately strong sulfuric acid. The product, recovered by filtration, is directly shippable, but can also be easily ...

Read More
Separation of thorium, uranium, and rare earths from a ...

2020-11-1  According to a review study performed by Zhu et al. (2015), the removal of uranium and thorium from rare earths is typically achieved via solvent extraction or precipitation. In comparison to solvent extraction, precipitation takes advantage of different precipitation pH of thorium, uranium, and rare earths to achieve the separation.

Read More
Separation of Radioactive Elements from Ethiopian

2018-10-11  The leaching and extraction behavior of uranium and thorium from a high-grade Ethiopian pegmatite ore in a mixture of hydrofluoric acid and sulfuric acid has been investigated. The effects of variables such as the temperature, particle size, acid concentration, and leaching time were studied. The leaching efficiency of uranium increased with increasing temperature to 150°C, at which 96% ...

Read More
Removal of 230Th by solvent extraction from high grade ...

2010-5-4  Removal of 230 Th by solvent extraction from high grade uranium ore liquid tailings to arrest 226 Ra production in the tailings Inderjit Nirdosh. ... (modifier), and kerosene diluent mixture was found to completely remove thorium from the solutions. The thorium was stripped from the loaded organic with a 15 wt% ammonium carbonate solution.

Read More
Request for Approval of Time-Critical Removal Action ...

2020-1-5  Thorium and Uranium processed and unprocessed ore piles at the Sitc pose a risk from external radiation exposure. Direct gamma radiation at the Site from these piles exceeds a 10-6 cancer risk based on a recreational use exposure scenario. 2, High levels of hazardous substances or pollutants in soils largely at or near the surface

Read More
[PDF] Hydrometallurgical removal of uranium and thorium ...

This study focused on the leaching of uranium and thorium from a high grade Ethiopian tantalite ore using sulfuric acid. The effects of variables such as acid concentration, temperature and leaching time were studied. In general, the leaching efficiency of uranium increases with increasing temperature from 100 to 300 °C whereas the opposite trend was observed for thorium.

Read More
Received April 13, 2018; reviewed; accepted July 13, 2018 ...

2020-9-4  Hydrometallurgical removal of uranium and thorium from Ethiopian tantalite ore Mulugeta Sisay Cheru 1, Alberto Velázquez del Rosario 2, Abubeker Yimam 3, Bogale Tadesse 4 and Goitom Gebreyohannes Berhe 5 1 School of Materials Science and Engineering, Jimma Institute of Technology, Jimma University, PO Box 378, Jimma, Ethiopia

Read More
Recovery of thorium from uranium solutions - NASA/ADS

At Elliot Lake, Ontario, thorium has been recovered from uranium ore leach solutions, after removal of the uranium by ion exchange resin, since 1959. A solvent extraction process is used, and the thorium is recovered as thorium sulfate by stripping the loaded solvent with moderately strong sulfuric acid. The product, recovered by filtration, is directly shippable, but can also be easily ...

Read More
Hydrometallurgical removal of uranium and thorium from ...

The amount of uranium leached increased from 69.1% at contact time of 1 hr to 88.6% when the tantalite ore was leached for 3 hrs. On the other hand, for the experiments conditions considered in this study, the leaching behavior of uranium and thorium did not change significantly with varying sulphuric acid concentration from 70 to 90 wt%.

Read More
Removal of 230Th by solvent extraction from high grade ...

2010-5-4  Removal of 230 Th by solvent extraction from high grade uranium ore liquid tailings to arrest 226 Ra production in the tailings Inderjit Nirdosh. ... (modifier), and kerosene diluent mixture was found to completely remove thorium from the solutions. The thorium was stripped from the loaded organic with a 15 wt% ammonium carbonate solution.

Read More
Separation of Uranium and Thorium from Monazite Ore

2016-4-1  Characteristics of thorium- uranium in Monazite ores The operation using a Novel technology which is the separation of uranium ,thorium and Cerium from a natural product such as monazite rocks. In the fact to consider this process is recovery for uranium

Read More
Request for Approval of Time-Critical Removal Action ...

2020-1-5  Thorium and Uranium processed and unprocessed ore piles at the Sitc pose a risk from external radiation exposure. Direct gamma radiation at the Site from these piles exceeds a 10-6 cancer risk based on a recreational use exposure scenario. 2, High levels of hazardous substances or pollutants in soils largely at or near the surface

Read More
Separation of Radioactive Elements from Ethiopian

2018-10-11  The leaching and extraction behavior of uranium and thorium from a high-grade Ethiopian pegmatite ore in a mixture of hydrofluoric acid and sulfuric acid has been investigated. The effects of variables such as the temperature, particle size, acid concentration, and leaching time were studied. The leaching efficiency of uranium increased with increasing temperature to 150°C, at which 96% ...

Read More
Technical Note Removal of radioactive elements from ...

2015-12-27  ore constituents in varying degrees. Rare earths, thorium and uranium are however highly leached by this acid (Krismer and Hoppe, 1984). Therefore, application of a proper solvent extraction method to the sulfate leach liquor would separate both Th and U. Subsequent leaching of the ore residue by hydrofluoric acid

Read More
Separation of Radioactive Elements from Ethiopian

The leaching and extraction behavior of uranium and thorium from a high-grade Ethiopian pegmatite ore in a mixture of hydrofluoric acid and sulfuric acid has been investigated. The effects of variables such as the temperature, particle size, acid concentration, and leaching time were studied. The leaching efficiency of uranium increased with increasing temperature to 150°C, at which 96% ...

Read More
[PDF] Hydrometallurgical removal of uranium and thorium ...

This study focused on the leaching of uranium and thorium from a high grade Ethiopian tantalite ore using sulfuric acid. The effects of variables such as acid concentration, temperature and leaching time were studied. In general, the leaching efficiency of uranium increases with increasing temperature from 100 to 300 °C whereas the opposite trend was observed for thorium.

Read More
removal of thorium and uranium from zircon sand - BINQ

2013-5-7  Uranium in mineral sands: measurement and uses. The uranium content of minerals such as zircon and rutile is a key parameter in the economics of mineral sand production as high uranium contents may by an ionisation process, essentially the removal of

Read More
Request for Approval of Time-Critical Removal Action ...

2020-1-5  Thorium and Uranium processed and unprocessed ore piles at the Sitc pose a risk from external radiation exposure. Direct gamma radiation at the Site from these piles exceeds a 10-6 cancer risk based on a recreational use exposure scenario. 2, High levels of hazardous substances or pollutants in soils largely at or near the surface

Read More
Removal of Hazardous Radionuclides from Uranium Ore

2017-2-3  uranium ore and mill tailings to remove radium. performed to obtain data on the r ry of radium, thorium, and ch liquors and on the recycle of leaching agents. A few scou hydrochl or? G aci d, ethyl en c acid (EDTA), tri ami nepentaaceti c acid ( sample of a western U.S. ore and tw les of tailings ined from different uranium mills th

Read More
Separation of Radioactive Elements from Ethiopian

The leaching and extraction behavior of uranium and thorium from a high-grade Ethiopian pegmatite ore in a mixture of hydrofluoric acid and sulfuric acid has been investigated. The effects of variables such as the temperature, particle size, acid concentration, and leaching time were studied. The leaching efficiency of uranium increased with increasing temperature to 150°C, at which 96% ...

Read More
Removing Uranium Thorium From Zircon

2015-7-27  Removing Uranium Thorium From Zircon 1. Mineral Engineering Technical Services Pty Ltd PO Box 5778 St Georges Tce WA 6831 P: (+61 8) 9421 9000 F: (+61 8) 9325 8311 ABN 66 009 357 171 W: metsengineering E: [email protected] A division of Midas Engineering Group ALTA 2014 Options For Removing Uranium Thorium From Zircon Mineral Sands Presented by

Read More
35 No. 9 Uranium Extraction Technology

2010-1-14  2.1.1. Uranium ore bodies 19 2.1.2. Mining recovery 19 2.2. Radiological and environmental aspects 22 2.2.1. Identification of radiological risks 22 2.2.2. Regulatory aspects 23 2.2.3. Dosimetric survey of workers 24 2.2.4. Radiological impact of ore mining and ore treatment on the environment 24 2.3. Grade control 26 2.3.1. General theory 26 2 ...

Read More
Economics of Thorium and Uranium Reactors

ready uranium pellets, starting from mining through enrichment. Uranium ore is typically mined as UO 2, UO 3, and U 2O 5. These are collectively referred to as U 3O 8, the most common form of uranium ore. 7. According to World Nuclear Association, it takes 8.9kg (19.6lbs) of U. 3. O. 8. to produce 1kg of enriched uranium. In 2011, the cost of U ...

Read More
Quantitative separation of small amounts of rare earths ...

2020-10-13  C. Separation of Rare Earths from Uranium and Z:irconium 44 1. Separation mechanism in the resin bed 44 2. Column design and operation 47 3. Choice of column paraneters 51 4. Elution behavior of rare earths and matrix elements 52 5. Separation procedure 53 a. Thorium b. Uranium c. Zirconium 53 53 58 6. Discussion of results 60

Read More

Copyright © 2020.Company name All rights reserved.SiteMap