copper slag electric furnace

The electric furnace technology for the cleaning of copper and nickel slags is a well-established method. Low investment costs, small footprint combined with continuous process development and equipment improvement make electric slag cleaning an attractive choice for modern smelters.

In the electric SBM Slag Cleaning Furnace, cleaning of the Flash Smelting Furnace slag is carried out by surface coke reduction. The Slag Cleaning Furnace is operated batch-wise in a circular electric furnace equipped with three electrodes.

The slag is tapped periodically from the Flash Smelting Furnace along water-cooled slag launders through the already charged coke layer into the furnace. Reduction of metal oxides starts during tapping and continues until the end for the entire time that the slag is in the furnace.

In conventional copper smelting, there are two phases to the production of ¡®blister¡¯ copper ingots. The first step is to smelt the concentrate, which is usually about 30% copper, in a primary furnace. During this process, the bulk of the barren rock, or silica, is separated from the copper matte as slag. Thereafter, the copper matte is transferred to a secondary or converter furnace, where the iron and sulphur contained in the matte is burned off using oxygen.

mining machinery manufacturer-SBM Group

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