Patent ID: 9739535
Date: 2017-08-22
CPC Classifications: C22B,F27B,F27D

Claim:
1. Method for smelting non-ferrous metal sulfides in a suspension smelting furnace, wherein the method includes using a suspension smelting furnace comprising a reaction shaft-, a settler -in communication with the reaction shaft via a first communication point that is formed between a lower end of the reaction shaft and the settler, and an uptake shaft in communication with the settler via a second communication point that is formed between the settler and a lower end of the uptake shaft, wherein said settler comprises a bottom structure, a top wall structure, a first side wall structure and a second side wall structure between the bottom structure and the top wall structure, and a first end wall structure at one end of the settler and a second end structure at the opposite end of the settler, a feeding step for feeding by means of a concentrate burner non-ferrous metal sulfides and reaction gas into the reaction shaft to have non-ferrous metal sulfides and reaction gas to react together in the reaction shaft to produce melt, a collecting step for collecting melt in the settler so that a layer of melt having a top surface is be formed in the settler, and a gas removing step for removing process gases from the suspension smelting furnace via the uptake shaft, characterized by an arranging step for arranging at least one injector configured to inject at least one of fluid and pulverous matter into the settler from at least one of the first side wall structure and the second side wall structure of the settler so that fluid and/or pulverous matter is injected into the settler by means of said at least one injection means above the top surface of the layer of melt in the settler, by an injecting step for injecting fluid and/or pulverous matter into the settler by means of said at least one injection means, by injecting fluid and/or pulverous matter in the injecting step into the settler by means of said at least one injection means in a direction parallel or almost parallel with the top surface of the layer of melt, and by injecting fluid and/or pulverous matter in the injecting step into the settler by means of said at least one injection means into process gases present in the settler above the top surface of the layer of melt in the settler.