Recovery of uranium, vanadium and fluorine from phosphate ores

Guirguis, L.A.

doi:10.1016/0304-386x(85)90047-7

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…At a nearby plant near Soda Springs, Idaho, vanadium has been recovered from vanadium-rich ferrophosphorus, a product of the electric reductor furnaces used to manufacture elemental phosphorus (Bauer and Dunning, 1979). Several companies have developed processes by which vanadium is recovered as a by-product from phosphoric acid (Fisher, 1962;Bauer and Dunning, 1979;Guirguis, 1985). In 1985 and 1986, the Phosphoria Formation was the chief U.S. domestic source of vanadium (Kuck, 1985;Goldberg and others, 1992).…”

Section: Vanadiummentioning

confidence: 99%

Geology and mineral resources of the Southwestern and South-Central Wyoming Sagebrush Focal Area, Wyoming, and the Bear River Watershed Sagebrush Focal Area, Wyoming and Utah: Chapter E in <em>Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming</em>

Wilson¹,

Hayes²,

Benson³

et al. 2016

Scientific Investigations Report

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Section: Vanadiummentioning

confidence: 99%

Geology and mineral resources of the Southwestern and South-Central Wyoming Sagebrush Focal Area, Wyoming, and the Bear River Watershed Sagebrush Focal Area, Wyoming and Utah: Chapter E in <em>Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming</em>

Wilson¹,

Hayes²,

Benson³

et al. 2016

Scientific Investigations Report

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show abstract

“…There are numerous studies on the extraction of vanadium from petroleum residues, vanadium‐bearing minerals and metallurgical slag 9. Acid leach is a commonly used process to extract vanadium from heavy oil fly ashes,10–13 vanadium‐bearing clay,14 vanadium‐bearing phosphate ores15 and spent catalysts 16. In some cases, this leach can also be carried out in an alkali solution 2, 11.…”

Section: Introductionmentioning

confidence: 99%

Improved extraction of vanadium from a Chinese vanadium‐bearing stone coal using a modified roast‐leach process

Chen

Zhang

Song

2009

Asia-Pacific J Chem Eng

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Vanadium is a rare metal mainly used in the steel industry. Vanadium-bearing stone coal is an important source of vanadium in China. The common process used to extract vanadium from the stone coals is roast-leach, which has the disadvantages of low vanadium recovery and significant pollution. This work presents a modified roast-leach process in order to improve the efficiency of the extraction. The modifications include a two-step leaching process: first water leach, followed by an acid leach of the water-leaching residue in a dilute HCl solution. In addition, the precipitate was recycled from the acid-leaching solution to the oxidation roast for use as a roasting agent, and low dosages of sodium salts (Na 2 CO 3 and Na 2 SO 4 ) were included in the oxidation roast to reduce the volume of HCl and Cl 2 exhaust gases and environmental pollution. The study was performed on a typical vanadium-bearing stone coal from the Xiushui mine in Jiangxi province, China. The results show that the modified process achieved a vanadium recovery of 85% from the stone coal, much higher than that from a one-step leach process (water leach or acid leach alone). Also, it has been found that optimum values of the roast temperature and time in the preroast (750 • C and 30 min) and oxidation roast (780 • C and 90 min) were required in order to obtain the maximum vanadium recovery from stone coal. It is shown that the modified roast-leach process is an economic and effective process for the recovery of vanadium from stone coals. 

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The hydrochloric acid route for phosphate rock

Habashi

Awadalla

Yao

1987

J of Chemical Tech & Biotech

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When phosphate rock is leached with hydrochloric acid, radium can be removed by co-precipitation with Bao.4Ca,.6S04 and uranium by extraction with a 5% solution of tributylphosphate in hexane or Varsol. Phosphoric acid is then separated from calcium chloride solution and other impurities by extraction with undiluted tributyl phosphate. The lanthanides can be precipitated from the raffinate by NH,, and CaS0,.2H20 by H2S04 to regenerate HCl for recycle. The organic phase containing H,PO, can be stripped by NH, to yield ammonium phosphate and to regenerate the tributyl phosphate for recycle. Fluorine can be precipitated from the initial leach solution as Na2SiF6.

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Recovery of uranium, vanadium and fluorine from phosphate ores

Cited by 3 publications

References 1 publication

Geology and mineral resources of the Southwestern and South-Central Wyoming Sagebrush Focal Area, Wyoming, and the Bear River Watershed Sagebrush Focal Area, Wyoming and Utah: Chapter E in <em>Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming</em>

Geology and mineral resources of the Southwestern and South-Central Wyoming Sagebrush Focal Area, Wyoming, and the Bear River Watershed Sagebrush Focal Area, Wyoming and Utah: Chapter E in <em>Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming</em>

Improved extraction of vanadium from a Chinese vanadium‐bearing stone coal using a modified roast‐leach process

The hydrochloric acid route for phosphate rock

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