TRANSACTION PAPER

Furnace energy efficiency at Polokwane Smelter

P.K. Van Manen

Polokwane Smelter

SYNOPSIS

Anglo Platinum's Polokwane Smelter is situated outside Polokwane, in the Limpopo Province in South Africa. A single 168 MVA six-inline rectangular furnace smelts dry concentrates containing platinum group metals (PGMs).
Furnace energy consumption since commissioning is presented, showing that energy efficiency improves as capacity utilization increases. An energy balance for the furnace is outlined, indicating the measured or calculated energy losses from the hearth and sidewall cooling, the copper coolers, the upper furnace walls and roof, and the energy losses in off-gas, matte, and slag.
From the energy balance, the potential to improve energy efficiency by controlling the slag temperature, the slag level, and the off-gas volume is derived. Furthermore, the impact on the energy balance of different concentrate types is discussed, as well as the potential impact of replacing all upper waffle coolers by plate cooler panels.

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References

1. HUNDERMARK, R., DE VILLIERS, L.P.S., and NDLOVU, J. Process description and short history of Polokwane Smelter, Southern African Pyrometallurgy 2006, R.T. Jones (ed.), SAIMM, Johannesburg, 5-8 March 2006, pp. 35-41.         [ Links ]

2. DE VILLIERS, L. P. S., HUNDERMARK, R., NELSON, L.R., and VIVIERS, P. Private communication, 2007.         [ Links ]

3. NELSON, L.R., STOBER, F., NDLOVU, J., DE VILLIERS, L.P.S., and WANBLAD, D. Role of technical innovation on production delivery at the Polokwane Smelter, Nickel and Cobalt 2005: Challenges in Extraction and Production, 44th Annual Conference of Metallurgists, Calgary, Alberta, Canada, 21-24 August 2005, pp. 91-116.         [ Links ]

4. YUHUA PAN, SHOUYI SUN, and SHARIF JAHANSHAHI, Efficient and Portable Mathematical Models for Simulating Heat Transfer in Electric Furnaces for Sulphide Smelting, International Symposium on Sulphide Smelting 2006, F. Kongoli and R. G. Reddy (eds.), The Minerals, Metals and Materials Society.         [ Links ]

5. CRC HANDBOOK OF CHEMISTRY AND PHYSICS, CRC Press, 63rd edition, 1982-1983.         [ Links ]

6. ROSENQUIST, T. Principles of Extractive Metallurgy, McGraw-Hill Book Company, 2nd edition, 1983.         [ Links ]