Effect of particle size on uranium bioleaching in column reactors from a low-grade uranium ore.
Bioresour Technol
; 281: 66-71, 2019 Jun.
Article
em En
| MEDLINE
| ID: mdl-30798088
ABSTRACT
This study evaluated the effectiveness of ore particle size on column bioleaching from low-grade uranium ore using an indigenous Acidithiobacillus ferrooxidans, isolated from local uranium ore. The uranium content was 0.033% by weight and ore particle size was crushed to <50â¯mm, <30â¯mm, and <15â¯mm. The additive content of sulfuric acid 5â¯g/L, Fe3+ dosage of 5.0â¯g/L, spray strength of 2.57â¯L/(h·m2) and temperature of 25⯰C were controlled. After 150â¯days of leaching, acid consumption amounted to 2.73â¯g H2SO4 per kg ore, the obtained maximum uranium extraction was 64.85% with the ore particle size of <15â¯mm. The results showed that a smaller particle size ore had a higher uranium extraction and that an economic uranium extraction can be obtained by correctly controlling the ore granularity.
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MEDLINE
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Urânio
Idioma:
En
Ano de publicação:
2019
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Article