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The Mitsubishi process has been selected as a smelting unit. This process is only one truly continuous process established in a commercial scale all over the world, which has a superior technology for copper smelting and converting. It is recognized as the most cost effective and environmental friendly process, and yielding anode copper directly from copper concentrate












Mitsubishi Continuous Process

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PT. Smelting applies Mitsubishi technology for copper smelting process. The Mitsubishi process is copper continuous smelting and converting technology using three furnaces. The three furnaces are linked with covered launders, through which all the molten materials are continuously transferred by gravity.

Copper concentrate (Cu: 30%, S: 30%, Fe: 25%, Gangue minerals 15%) is fed through lance pipe with oxygen enriched air into the smelting furnace then oxidized and melted by exothermic reaction to form molten mixture of matte (Cu: 68%) and slag. The matte is separated from slag by difference of specific gravity in the slag cleaning furnace. The matte is further oxidized to form blister copper (Cu: 98.5%) in the converting furnace.

 Mitsubishi Continuous
The Advantage of
   Mitsubishi Process
Process Description

Raw Material Handling

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