Method of converting copper containing material
AssigneeOutotec (Finland) Oy
InventorsMarkku Lahtinen, Jouni Pihlasalo, Mikael Jåfs
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Abstract
The present invention provides a method of converting copper containing material to blister copper comprising: (a) providing copper containing material comprising copper sulfides and iron sulfides, whereby the copper containing material comprises at least 35 wt % copper of the total weight of the copper containing material; (b) reacting the copper containing material in a furnace with an oxygen containing gas, in the absence of flux, to effect oxidation of iron sulfide and copper sulfide, and controlling injection of the oxygen containing gas and the temperature so that the resulting converter slag is in a molten phase to obtain blister copper and converter slag.
Claims29
A method of converting copper containing material to blister copper comprising the following steps:
- (a) providing copper containing material comprising copper sulfides and iron sulfides, whereby the copper containing material comprises at least 35 wt % copper of the total weight of the copper containing material;
- (b) reacting the copper containing material in a furnace with an oxygen containing gas, in the absence of flux, to effect oxidation of iron sulfide and copper sulfide, and controlling injection of the oxygen containing gas and the temperature so that a resulting converter slag is in a molten phase to obtain blister copper and converter slag, wherein in step (b) the oxygen partial pressure (pO2) is from 1 to 100 Pa.
A method of converting copper containing material to blister copper comprising the following steps:
- (a) providing copper containing material comprising copper sulfides and iron sulfides, whereby the copper containing material comprises at least 35 wt % copper of the total weight of the copper containing material;
- (b) reacting the copper containing material in a furnace with an oxygen containing gas, in the absence of flux, to effect oxidation of iron sulfide and copper sulfide, and controlling injection of the oxygen containing gas and the temperature so that a resulting converter slag is in a molten phase to obtain blister copper and converter slag, wherein in step (b) a concentration of oxidized copper the converter slag is at least 30 wt %, and wherein in step (b) the oxygen partial pressure (pO2) is from 1 to 100 Pa.
Dependencies are inferred from the claim text.