| 1. | Acid leaching from mines and mechanical processing of ore speed up the process.
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| 2. | Raw lunar regolith would be refined by a variety of techniques, primarily hydrofluoric acid leaching.
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| 3. | This facility produced thorium, radium, and uranium by acid leaching of monazite sands and other ores.
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| 4. | Mg is used as a reactant in order to allow for acid leaching of unwanted oxide products.
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| 5. | Proposals to carry on mining by sulfuric acid leaching were considered but these were shelved in 1997.
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| 6. | That plant also uses acid leaching.
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| 7. | The Husab Mine is to start production in early December 2015 after completion of the sulfuric acid leaching plant.
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| 8. | Instead, erosion ate away at it, in the form of acid leaching, and broke down much of its pumice content.
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| 9. | These reactions are exothermic and can be used to produce the diborides by SHS . Production of ZrB 2 from acid leaching.
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| 10. | Mining started in 1997 and is again a conventional truck and shovel operation followed by crushing, pre treatment and stacking before acid leaching.
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