Method and arrangement for refining copper concentrate

摘要

The invention relates to a method and to an arrangement for refining copper concentrate. The arrangement includes a suspension smelting furnace comprising a reaction shaft, and a settler. The reaction shaft is provided with a concentrate burner for feeding copper concentrate such as copper sulfide concentrate and/or copper matte and additionally at least reaction gas into the reaction shaft to obtain a blister layer containing blister and a first slag layer containing slag on top of the blister layer in the settler, and a slag cleaning furnace. The arrangement includes a feeder configured for feeding blister from the blister layer in the settler and for feeding slag from the first slag layer in the settler into the slag cleaning furnace.

主权项

1. A method for refining copper concentrate, wherein the method comprises
using a suspension smelting furnace comprising a reaction shaft, and a settler, wherein the reaction shaft of the suspension smelting furnace is provided with a concentrate burner for feeding copper concentrate and additionally at least reaction gas into the reaction shaft of the suspension smelting furnace to obtain a blister layer containing blister and a first slag layer containing slag on top of the blister layer in the settler of the suspension smelting furnace, and using a slag cleaning furnace, and feeding copper concentrate and additionally at least reaction gas into the reaction shaft of the suspension smelting furnace to obtain a blister layer containing blister and a first slag layer containing slag on top of the blister layer in the settler of the suspension smelting furnace, and wherein the method comprises feeding slag from the first slag layer in the settler of the suspension smelting furnace and blister from the blister layer in the settler of the suspension smelting furnace from the suspension smelting furnace into the slag cleaning furnace, treating blister and slag in the slag cleaning furnace with a reduction agent to obtain a bottom metal layer containing bottom metal copper and a second slag layer containing slag on top of the bottom metal layer in the slag cleaning furnace, discharging bottom metal copper from the bottom metal layer in the slag cleaning furnace, and discharging slag from the second slag layer in the slag cleaning furnace.