Oxygen-rich bottom blown copper smelter and oxygen-rich bottom blown technology for extraction of copper

Abstract

The invention brings forward an oxygen-rich bottom blown copper smelter and an oxygen-rich bottom blown technology for extraction of copper. The oxygen-rich bottom blown copper smelter comprises a furnace body which defines a cavity therein and is provided with a feed inlet, a flue gas outlet, a copper sulfonium outlet, a slag hole, oxygen lance jacks formed in the bottom of the furnace body and oxygen lances which are inserted in the oxygen lance jacks for blowing oxygen-rich gas into a copper sulfonium layer in the cavity. According to the oxygen-rich bottom blown copper smelter and the oxygen-rich bottom blown technology for extraction of copper in embodiments of the invention, materials need not to be granulated, thereby simplifying the operation of smelting and reducing cost; most oxygen reacts with sulfides in the copper sulfonium layer, little oxygen enters with reacted gas into a slag layer from the copper sulfonium layer, the content of resultant magnetic iron in slag is low,viscosity of the slag is reduced, an insulating layer is not easy to form, and copper and sulfonium in the slag is easy to settle, thereby allowing a high iron slag type to be employed to reduce the rate of fusing agents, a slag rate and loss of copper in the slag; simultaneously, foamed slag is not easy to generate, good security is obtained, and mushroom heads, which protect oxygen lances and endow oxygen lances with a long life, are easy to form on the upper ends of oxygen lances.

Description

technical field [0001] The invention relates to an oxygen-enriched bottom-blowing copper smelting furnace and an oxygen-enriched bottom-blowing copper smelting process. Background technique [0002] Flash smelting and bath smelting are two widely used copper pyrometallurgical smelting methods. 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. 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 reacti...

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