Nickel-cobalt smelting furnace and nickel-cobalt smelting process

Abstract

The invention provides a nickel-cobalt smelting furnace and a nickel-cobalt smelting process. The nickel-cobalt smelting furnace comprises a furnace body and an oxygen lance, wherein a furnace chamber is limited in the furnace body; the furnace body is provided with a feeding opening, a smoke outlet, a sulfonium outlet, a slag hole and an oxygen lance inserting hole formed at the bottom of the furnace body; and the oxygen lance is inserted in the oxygen lance inserting hole and used for blowing the oxygen-rich gas into a sulfonium layer in the furnace chamber. According to the nickel-cobalt smelting furnace and the nickel-cobalt smelting process provided by the embodiment of the invention, materials have no need for pelleting, therefore, the smelting operation is simplified and the cost is reduced; most of oxygen is reacted with sulfide in the sulfonium layer and oxygen entering the slag layer from the sulfonium layer along with the gas after reaction is little to ensure that the content of magnetic iron generated in the slag is low, the stickiness of the slag is reduced, an isolation layer is not easy to form and the sulfonium in the slag is easy to settle, therefore, a high ironslag type can be adopted, the flux rate and the slag rate are reduced and the metal loss in the slag is reduced; and in the meantime, foaming slag is not easy to produce to ensure that the safety is good and a mushroomed head is easy to form at the upper end of the oxygen lance to ensure that the oxygen lance is protected and therefore long in service life.

Description

technical field [0001] The invention relates to an oxygen-enriched bottom-blown matte smelting furnace and an oxygen-enriched bottom-blown matte smelting process, in particular to an oxygen-enriched bottom-blown matte smelting furnace and an oxygen-enriched bottom-blown matte melting furnace suitable for smelting copper and nickel (cobalt). Matte smelting process. Background technique [0002] Flash smelting and bath smelting are two types of pyrometallurgy methods that are widely used, such as for smelting copper, nickel (cobalt), etc. Melting pool smelting has been widely used because the raw materials do not need deep drying. Shaft furnace type), etc., these bath smelting methods have their own advantages and disadvantages. [0003] For example, the Noranda method uses a reactor similar to a horizontal converter, and a row of wind holes is arranged on one side of the reactor, and air or oxygen-enriched air is blown into the reaction vessel through the wind holes. Howev...

AI Technical Summary

Problems solved by technology

However, the problem with the Noranda method is that due to the single side blowing, the gas-liquid mixing is uneven, there is a dead angle in smelting, and the single side blowing is easy to cause serious erosion of the refractory material in the reaction vessel, especially the part near the wind eye. , reduces the service life, it is difficult to increase the enriched oxygen concentration, and the utilization rate of oxygen is low

Images