| 摘要 |
<p>PURPOSE:To recover advantageously a useful metal such as iron in the molten copper matte discharged from a copper refining furnace by treating the molten matte by using carbon powder, flux, carrier gas, O2, etc., in a tap blown converter. CONSTITUTION:The molten matte discharged from a copper refining furnace is charged into the top and bottom blown converter 1. The coal powder, flux and if necessary iron ore-contg. powder are suspended respectively in the carrier gas and is blown together with O2 into the converter from a top blowing lance 3 and a bottom blowing tuyere 4 at the bottom of the converter. The iron oxide in the molten matte is reduced by the fixed carbon and reducing volatile gas in the coal powder to be blown from the hearth part. The combustible volatile component in the coal burns by contacting with O2 and contributes to the maintenance or increase of the temp. of the molten matte. On the other hand, the powder raw material and O2 blown from the lance 3 react with each other during the time when both and blown to the molten matte and in the case of using, for example, the iron ore-contg. powder, the iron oxide in the iron ore is reduced to iron by generated gaseous CO. The iron settles in the molten matte and the flux forms the molten slag to cover the surface of the molten iron.</p> |
