Improved performance of Soderberg electrodes

Abstract
Most electric furnaces in the nickel and copper smelting industries are still fitted with conventional electrode holders which consist of water-cooled electrical contact clamps and a pressure ring. The water cooling exerts a significant cooling effect on the electrode column. The importance of controlling the temperature of the Soderberg electrode paste at the contact clamp area is examined, using in-plant experience and computer simulation of the paste melting and baking process. In addition to the effect of water-cooling, the effect of other variables, including the mantle air temperature, the electrode current, the furnace freeboard temperature and the electrode slipping rate are discussed. Ways in which the variable heating conditions in the paste melting zone can be controlled are outlined.
Keywords: Smelter operation, Soderberg electrodes, Electrode paste, Paste, Freeboard temperatures
Full Access to Technical Paper
PDF version for $20.00
Search
Sort By:  Relevance
Showing results 1 - 2
Text
Summary: Operations started at BCL in December 1973, and the smelter is currently in the seventh year of its fifth campaign. The next major shutdown is scheduled for 1995. During the current campaign, a number of major on-line refurbishments have been carried out without any significant disruption to production. These include the complete rebuild of both drying plant electrostatic precipitators, the installation of a new electrostatic precipitator at the flash furnace, the conversion to a distributed...
Publication: CIM Bulletin
Author(s): R.A. Hall, G.A. Highcock
Keywords: Smelter operation, Nickel mining, Copper mining, Metallurgy.
Issue: 991
Volume: 88
Year: 1995
Text
Summary: Planned increases in electric furnace productivity and higher matte temperatures needed for the Sudbury Smelter's SO2 Abatement Plan, require an improved matte tap hole. Since startup in 1978, the matte tap holes have been incrementally improved by the addition of copper cooling blocks around the refractory tap blocks. These improvements provided a tap block life of about 100 taps per campaign.
In July 1993, a prototype matte taphole was installed in Number 2 Electric Furnace to develop the...
Publication: CIM Bulletin
Author(s): I.A. Cameron, R. Sriram, F. Ham
Keywords: Smelters, Falconbridge, Tap hole developments, Matte tap holes.
Issue: 991
Volume: 88
Year: 1995
Powered by Coveo Enterprise Search