Reagent optimization across a UG2 plant
- Muzenda, Edison, Abdulkareem, Ambali S., Afolabi, Ayo S.
- Authors: Muzenda, Edison , Abdulkareem, Ambali S. , Afolabi, Ayo S.
- Date: 2013
- Subjects: Reagent optimization
- Type: Article
- Identifier: uj:4860 , ISBN 978-988-19251-0-7 , http://hdl.handle.net/10210/12536
- Description: Reagent optimization is very important in the recovery of valuable metals from their ore via flotation. This is particularly important for large platinum operations where correct reagent regime and addition system can provide improvement opportunities in recovery and grade. Also reagent optimization can reduce reagent costs for the rougher, scavenger and cleaner flotation units. Reagents were optimized in the flotation of hot floats from the plant at laboratory scale. It was found that in order to save cost, the collector and depressant must be reduced in the roughers and cleaners respectively. This report presents results and some practical considerations that must be taken into account to optimise reagent usage.
- Full Text:
- Authors: Muzenda, Edison , Abdulkareem, Ambali S. , Afolabi, Ayo S.
- Date: 2013
- Subjects: Reagent optimization
- Type: Article
- Identifier: uj:4860 , ISBN 978-988-19251-0-7 , http://hdl.handle.net/10210/12536
- Description: Reagent optimization is very important in the recovery of valuable metals from their ore via flotation. This is particularly important for large platinum operations where correct reagent regime and addition system can provide improvement opportunities in recovery and grade. Also reagent optimization can reduce reagent costs for the rougher, scavenger and cleaner flotation units. Reagents were optimized in the flotation of hot floats from the plant at laboratory scale. It was found that in order to save cost, the collector and depressant must be reduced in the roughers and cleaners respectively. This report presents results and some practical considerations that must be taken into account to optimise reagent usage.
- Full Text:
Effect of pH on the recovery and grade of base metal sulphides (PGMs) by flotation
- Muzenda, Edison, Afolabi, Ayo S., Abdulkareem, Ambali S., Ntuli, Freeman
- Authors: Muzenda, Edison , Afolabi, Ayo S. , Abdulkareem, Ambali S. , Ntuli, Freeman
- Date: 2011
- Subjects: Platinum Group Metals , Metal sulphides , Flotation
- Type: Article
- Identifier: uj:4713 , ISSN 2078-0966 , http://hdl.handle.net/10210/10959
- Description: This study investigated the effect of pH on the recovery and grade of the Platinum Group Metals (PGMs) and base metal sulphides from the UG2 ore of the Bushveld Complex. This was achieved through running a series of test work in a Denver flotation cell at varying pH 6-11 at constant reagent dosage. The UG-2 reef is characterized by two predominant gangue phases i.e. chromite and silicate, that have significantly different physical and chemical properties. The test work was aimed at evaluating which pH gives best recoveries, and finding the effect of the chrome content in these recoveries. A pH of 9 gave the highest recovery compared to other pH ranges. However, the highest PGM grade was attained at a pH of 6 which is slightly acidic. Ideally this trend could be expected since the collectors (xanthates) are more stable in alkaline medium. The higher PGM recovery was also accompanied by higher chrome content as a result of their similar chemical properties.
- Full Text:
- Authors: Muzenda, Edison , Afolabi, Ayo S. , Abdulkareem, Ambali S. , Ntuli, Freeman
- Date: 2011
- Subjects: Platinum Group Metals , Metal sulphides , Flotation
- Type: Article
- Identifier: uj:4713 , ISSN 2078-0966 , http://hdl.handle.net/10210/10959
- Description: This study investigated the effect of pH on the recovery and grade of the Platinum Group Metals (PGMs) and base metal sulphides from the UG2 ore of the Bushveld Complex. This was achieved through running a series of test work in a Denver flotation cell at varying pH 6-11 at constant reagent dosage. The UG-2 reef is characterized by two predominant gangue phases i.e. chromite and silicate, that have significantly different physical and chemical properties. The test work was aimed at evaluating which pH gives best recoveries, and finding the effect of the chrome content in these recoveries. A pH of 9 gave the highest recovery compared to other pH ranges. However, the highest PGM grade was attained at a pH of 6 which is slightly acidic. Ideally this trend could be expected since the collectors (xanthates) are more stable in alkaline medium. The higher PGM recovery was also accompanied by higher chrome content as a result of their similar chemical properties.
- Full Text:
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