Abstract
The Barium Sulphide Process removes sulphates from mine water by precipitating BaSO4 with BaS. Barium sulphide is regenerated thermally by reducing the BaSO4 with coal at 1000–1100°C for about 15 minutes. The process produces elemental sulphur and CaCO3 as by-products. Laboratory studies achieve typical sulphate reductions of about 95%. Metals such as Fe, Ni, Co and Mn are also removed and pH can be increased from 1,4 to 8,3. The process has a water recovery of about 70%. For a 25 Ml/d plant (2g/l SO4 2−), the capital cost is estimated at US$ 0,48m/Ml/d, while the detailed running costs amount to a net value of 27 c/m3. This compares well with that of other processes for desalination and is less than the fresh water price for new mines in South Africa, viz. 30c/m3.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
