Du Toit, T & Crozier, M 2012, 'Khumani Iron Ore Mine paste disposal and water recovery system', in R Jewell, AB Fourie & A Paterson (eds), Proceedings of the 15th International Seminar on Paste and Thickened Tailings
, Australian Centre for Geomechanics, Perth, pp. 243-258.
Traditional iron ore beneficiation plants using washing screening and jigging processes require large volumes of process water. Therefore, when a suitable large iron ore deposit is found in a location where rainfall is erratic and raw water sources are limited, innovative process designs are required to minimise water losses, maximise reuse of process water and minimise raw water intake to ensure the project viability.
This case study provides an overview of the Khumani paste disposal facility (PDF) located in the Northern Cape of South Africa. The plant uses a central ring main water reticulation circuit combined with a two stage thickening system to maximise water recovery.
At the process plant there are two large 90 m diameter traction thickeners and at the PDF two 18 m paste thickeners. The net raw water usage has been minimised, and water losses on the PDF are at levels between 0.43–0.69 m3/t deposited.
Cooper, R.A. and Smith, M.E. (2011) Case study operations of three paste disposal facilities, in Proceedings 14th International Seminar on Paste and Thickened Tailings (Paste2011), R.J. Jewell and A.B. Fourie (eds), 5‒7 April 2011, Perth, Australia, Australian Centre for Geomechanics, Perth, pp. 261–270.
De Koning, L. (2009) Paste disposal system design criteria document, Report No. ECMP/T1020-1, October 2009.
De Swart, G. (2007) Functional description for new paste disposal facility (BKM project), Report No. GT-04/2007, Report to ECMP (Pty) Limited, April 2007.
Du Toit, T. (2005) BKM Internal Feasibility Study Report: Metallurgical Test Work & Interpretation, November 2005.
Du Toit, T. (2010) Khumani Iron Ore Mine BKM project process description, Internal report, 25 June 2010.
Houman, J. and Johnson, G. (2003) Commissioning and Operation of the paste thickening farm at Kimberley Combined Treatment, in Proceedings International Seminar on Paste and Thickened Tailings (Paste 2003), 14-16 May, Melbourne Australia, Section 12.
Paste Thick and Associates (Pty) Limited (2005) Pilot plant and geotechnical flume tests internal feasibility study on BKM tailings, January 2005.
Paterson & Cooke Consulting Engineers (2005) BKM Residue pumping System: Design Description & Costing Document, Document PST-677.R07 Rev 2, June 2005.