uranium milling raffinate

How yellowcake shaped the West — High Country News – …

2021-7-30 · The Monticello mill was among those that perished in 1960, much to the dismay of the local business community, after having processed 900,000 tons of uranium ore, churned out more than 800,000 ...

Microscale mineralogical characterization of As, Fe, and ...

2012-11-1 · Empirical data and modeling results of the hydrometallurgical leaching and neutralization process of the acidic raffinates in the Cameco Rabbit Lake uranium mill, which uses a similar tailings neutralization process as the Key Lake mill (Moldovan and Hendry, 2005), indicate that concentrations of As and Fe in the raffinate are controlled by precipitation of …

UMTRA PROJE WATERSAMPLING ANDANALYSISPLAN …

2004-8-26 · Ground water at the former uranium mill/tailings site and raffinate pond area has been contaminated by the former milling operations. The contaminants related to the former uranium milling operations that could be of potential concern for human health and the environment include arsenic, cadmium, chloride, cobalt, copper, lead, manganese,

GEOCHEMICAL CHARACTERISTICS OF ALUMINUM AND …

2017-5-27 · FROM URANIUM MILL RAFFINATE (PH 1.0-10.5) AND THEIR CONTROLS ON AQUEOUS CONTAMINANTS 33 4.1 Abstract 33 4.2 Introduction 34 4.3 Materials and Methods 36 4.3.1 Synthetic Raffinate Neutralization Experiments 36 4.3.2 Sample Collection and Treatment 38 4.3.3 Batch EOC Adsorption Experiments 39 4.3.4 Sample Analysis 39 4.4 …

Structural characterization of poorly-crystalline ...

2009-6-1 · Here, only the arsenic species precipitated from the raffinate are of interest. In order to focus on the essential chemistry of As precipitation from the raffinate, an uranium mill raffinate solution without residual solids was neutralized under laboratory conditions to a range of terminal pH values from 2 to 7 (Rowson and Tremblay, 2003 ...

Operation of Shootaring Canyon Uranium Mill …

2018-3-15 · A vanadium circuit addition is proposed for the uranium mill upon approval by the State. An engineering design will be prepared and submitted to the State for information purposes prior to construction. The basic process is described below. The depleted aqueous solution from the uranium solvent extraction, the uranium raffinate, serves

Arsenic Scavenging by Aluminum-Substituted Ferrihydrites ...

2019-12-12 · Precipitation of aluminum and magnesium secondary minerals from uranium mill raffinate (pH 1.0–10.5) and their controls on aqueous contaminants. Applied Geochemistry 2016, 64, 30-42. DOI: 10.1016/j.apgeochem.2015.09.002. Areej Adra, Guillaume Morin, Georges Ona-Nguema, Jessica Brest.

Subpart W Rulemaking Activity: Applications | Radiation ...

Subpart W Rulemaking Activity: Applications. Documents related to Pinon Ridge Mill and the application for approval of construction of a tailings facility are available below. You may need a PDF reader to view some of the files on this page. See EPA''s About PDF page to learn more. Cover Letter: Energy Fuels Resources Corporation (PDF) (2 pp ...

URANIUM RECOVERY PROCESS (Patent) | OSTI.GOV

@article{osti_4805452, title = {URANIUM RECOVERY PROCESS}, author = {}, abstractNote = {BS>In the prior art of processing of uranium ores, the ore is first digested with nitric acid and filtered, and the uranium values are then extracted from the filtrate by contacting with an organic solvent. The insoluble residue ldas been processed separately in order to recover any uranium …

Fifth Five-Year Review Report for Uravan Uranium …

2021-12-1 · uranium processing operations), raffinate crystals (primarily ammonium sulfate compounds), and mill tailings containing uranium and radium. Other chemicals in the tailings and groundwater included heavy metals (lead, arsenic, cadmium …

EEOICPA sites: Uranium Mill in Durango | Stephens & …

Milling operations produced about 1.2 million cubic yards of radioactive mill tailings, a predominantly sandy material. The tailings contaminated about 33 acres and raffinate liquids (the spent solution remaining after removing of uranium and …

CNS | Conference Proceedings Paper

For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each. For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request. Contact the CNS office to order reprints.

Durango, Colorado, Processing and Disposal Sites Fact …

2021-7-6 · the Uranium Mill Tailings Radiation Control Act of 1978. Site Information and History Info-square Book-open The Durango processing site is the location of a former uranium mill in the city of Durango, Colorado. The former processing site consists of two separate areas: the mill tailings area and the raffinate ponds area. Both areas are

Jared Robertson

2015-9-9 · Jared Robertson | Saskatoon, Saskatchewan, Canada | Intermediate Geochemist at Okane Consultants | • Ph.D. - Department of Geological Sciences, University of Saskatchewan • B.Sc. - Chemical Engineering with Great Distinction, along with a Biochemical option • Thesis involves studying and characterizing Al and Mg mineral phases in a uranium mill effluent and …

Experimental study on the application of Eluex process in ...

2020-7-6 · The uranium concentration in loaded strip solution was 52.8 g L −1. Parameters of the process were determined, and the impact of Eluex process in underground leaching was also investigated. In industrial design, 95% of raffinate went back to elution and 5% back to ISL. No significant effect on uranium leaching or resin adsorption has been found.

Verification Monitoring Report and Analytical Update for ...

2011-1-19 · Statistical Analysis of Uranium-Mill Raffinate Contamination in Water Wells in Lincoln Park, South-Central Colorado By Edward R. Banta Abstract An alluvial aquifer in Lincoln Park, Colo­ rado, is contaminated by raffinate from a nearby uranium mill. Analysis of ground-water-quality data for samples from wells completed in the allu­

Joel Ban, USB #10114 Ban Law Office PC Paul (pro …

2018-7-19 · material that is pumped out of the mill from a series of eight big tanks called the counter-current-decantation circuit. The second is a uranium-depleted solution, sometimes called raffinate or "process solution," that is discharged from solvent-extraction circuits. Both waste streams are pumped into the waste pits next to the mill. 10.

TENORM: Copper Mining and Production Wastes | …

2016-9-14 · Raffinate. Raffinate generated at copper mines is generally stored in ponds and recycled back to the leaching operation as a leaching solution. Following the closure of a mine, the raffinate must be disposed. Uranium-enriched raffinate may be considered a resource that can be exploited at relatively low cost through eulex-ion exchange technology.

XAFS of Synthetic Iron(III)-Arsenate Co-Precipitates and ...

2008-1-16 · A uranium mill raffinate solution without solid leach residual was neutralized under laboratory conditions to a range of terminal pH values from 2 to 6 [8]: sample raf #1, #2, #3, and #4 correspond to terminal pH of 2.18, 3.15, 4.04, and 6.09, respectively.

Coordination of arsenic and nickel to aluminum and ...

2017-6-1 · The milling of uranium (U) at Key Lake (KL) in northern Saskatchewan, Canada is one example of an industrial activity that acid-leaches primary minerals (such as kaolinite, chlorite, arsenopyrite, and gersdorffite) associated with U ore and uses a neutralization process to precipitate the dissolved metals (e.g., Al, Mg, Fe) and elements of ...

Waste Guide for the Uranium Milling Industry

DISSOLVED RADIUM-226 IN URANIUM MILL PROCESS FLOWS Process Acid Leach Solvent extraction3- Raffinate Sands and slimes Resin-in-pulpb Alkaline Leachc 7C of Total Ra dissolved by leaching 0.4-0.7 1.5-2.2 %of Dissolved Ra leaving mill in Tailings flow (80) (15) 95 93 in Yellowcake 5 7 100 Reference 1. Reference 5. cReferences 3 and 4.

EEOICPA Covered Facilities: Uranium Mill in Durango ...

The Uranium Mill in Durango is listed as a Department of Energy (DOE) site under the EEOICPA. The Durango processing site is a former uranium-ore processing facility located a quarter of a mile southwest of the city of Durango, Colorado. …

Uranium Milling

2016-11-22 · The completion of this 300-ton per day mill marked the first commercial plant in Texas to treat uranium ores. The plant is owned by Susquehanna-Western, Inc., a totally-owned subsidiary of Susquehanna …

The 26,000 tons of radioactive waste under Lake Powell ...

2017-12-19 · The 26,000 tons of radioactive waste under Lake Powell The West''s uranium boom brought dozens of mills to the banks of the Colorado River — where toxic waste was dumped irresponsibly.

Jared Robertson

2015-9-9 · University of Saskatchewan. May 2011 - Aug 20114 months. • Worked multiple shifts in Key Lake assisting a professional engineer with a pilot scale uranium mill experiment. • Became familiar with the uranium milling process at …

Structural characterization of poorly-crystalline ...

Structural characterization of poorly-crystalline scorodite, iron(III)-arsenate co-precipitates and uranium mill neutralized raffinate solids using X-ray absorption fine structure spectroscopy

Structural characterization of poorly-crystalline ...

X-ray absorption fine structure (XAFS) is used to characterize the mineralogy of the iron(III)-arsenate(V) precipitates produced during the raffinate (aqueous effluent) neutralization process at the McClean Lake uranium mill in northern Saskatchewan, Canada. To facilitate the structural characterization of the precipitated solids derived from the neutralized raffinate, a set of …

Uranium Milling

2016-11-22 · The completion of this 300-ton per day mill marked the first commercial plant in Texas to treat uranium ores. The plant is owned by …

Verification Monitoring Report for the Durango, …

2021-11-8 · two separate areas: (1) the mill tailings area, which is the setting of former uranium-ore milling and storage of mill tailings, as well as a lead smelter plant that operated previous to the uranium mill, and (2) a raffinate ponds area where liquid process-wastes were impounded during milling operations.

EEOICPA Covered Facilities: Weldon Spring Raffinate Pits ...

Facility Description: In 1955 the U.S. Department of the Army (Army) transferred 217 acres of what had been the Weldon Springs Ordnance Works to the U.S. Atomic Energy Commission (AEC) to construct a uranium feed materials plant. In addition to the plant, the AEC also constructed four raffinate pits adjacent to the plant between 1958 and 1964.

Chemistry 30: Equilibria

2020-4-10 · Uranium Processing PowerPoint: The Rabbit Lake Mill Power Point Notes to Teacher: 1. Raffinate is a product which has had a component or components removed; in this activity, raffinate is what is left after Uranium has been removed through the milling process. 2. The raffinate solution will need to be prepared in advance for students.

Uranium leeching process and in-situ mining (Patent ...

@article{osti_5750624, title = {Uranium leeching process and in-situ mining}, author = {Buddecke, D B and Lyons, W C and Rofer-depoorter, C K and Zublin, E A}, abstractNote = {Mineral values are recovered from underground formations, and pollution of the formation is substantially diminished if not eliminated, by determining the geometry of an ore body and thereafter …

CONTROLS OF TOXIC ELEMENTS IN ABIOTIC REDUCTIVE ...

CONTROLS OF TOXIC ELEMENTS IN ABIOTIC REDUCTIVE DISSOLUTION OF URANIUM MILL RAFFINATES AND TAILINGS UNDER ALKALINE CONDITIONS Mario Alberto Gomez, Jim Hendry, Joseph Essilfie-Dughan, Jian Chen and ...

Use of solvent extraction technique in Brazilian uranium ...

2008-7-1 · @article{osti_21230347, title = {Use of solvent extraction technique in Brazilian uranium mills - an overview}, author = {Gomiero, Luiz A and Morais, Carlos A}, abstractNote = {Solvent extraction has been applied to uranium-concentrate production in Brazil. At the first plant, uranium minerals associated with Zr and Mo were acid leached. Extraction was carried out by …

Controls on 226Ra during raffinate neutralization at the ...

2011-12-1 · Highlights Samples of uranium mill raffinate (pH 1.2) were neutralized to pH 10 with Ca(OH) 2 and NaOH ± BaCl 2. Neutralization experiments showed 226 Ra concentrations decreased from 150 to <4 Bq/L with all neutralizing agents. Ca(OH) 2 + BaCl 2 was the most effective treatment (final concentration ∼1.0 Bq/L; ∼99.3% removal). Aqueous concentrations …