Technical and Economic Evaluation and Selection of Sulfate ION Removal Technologies for Recovery of Water from Mineral Concentrate Transport Slurry
This paper presents the findings of a comprehensive evaluation for a Primary Mineral Processing (PMP) company that contracted Battelle to identify economical technology to remove sulfate ion (SO4 2−) from mineral slurry transport (MST) water, now disposed of as a waste, for reuse or sale. MST water is separated from product by dewatering a sulfidic mineral concentrate slurry prior to loading and shipping of the solid product. The MST water sulfate ion concentration is between 400 and 1720 mg/L, below the high concentrations for which technologies such as lime precipitation, crystallization, and evaporation are favorable, and above low concentrations that are amenable to ion exchange technology, reuse, or release. In addition, the salt concentrations fluctuate significantly causing processing issues with a number of purification technologies. The technical target is to reduce sulfate levels to < 500 mg/L SO4 2− to allow water reuse, and especially to < 250 mg/L SO4 2− (drinking water requirements) to provide the broadest reuse options. Based on company criteria of proven technology, operability, minimum residuals, and cost effectiveness in meeting the requirements for sulfate reduction, the two top-rated technologies recommended were ettringite production and precipitation using aluminum oxide, and electrochemical salt splitting.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2006-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites