Oxygen-enriched bottom-blown matte smelting furnace and oxygen-enriched bottom-blown matte smelting technology

Abstract

The invention provides an oxygen-enriched bottom-blown matte smelting furnace and an oxygen-enriched bottom-blown matte smelting technology. The oxygen-enriched bottom-blown matte smelting furnace comprises a furnace body and oxygen guns. The furnace body is equipped with a furnace chamber therein, feed inlets, a flue gas outlet, a sulfonium outlet, a slag hole and oxygen gun jacks formed on furnace body bottom; and the oxygen guns are inserted into the oxygen gun jacks to blow oxygen-enriched gas into a sulfonium layer in the furnace chamber. According to an embodiment of the oxygen-enriched bottom-blown matte smelting furnace and the oxygen-enriched bottom-blown matte smelting technology of the invention, granulation of materials is not required, so as to simplify smelting operations and reduce costs. Most oxygen is reacted with sulfides in the sulfonium layer, and little oxygen, company with a reacted gas, enters to a slag layer from the sulfonium layer; a content of magnetic iron generated in the slag is small, and viscosity of the slag is lowered, so that a separating layer is not likely to form, and sulfonium in the slag is easy to be precipitated. Therefore, a high iron slag type can be adopted to lower flux rate and slag rate, and reduce loss of metal in the slag. Meanwhile, foam slag is not likely to generate to ensure good security, and mushroom head is easy to form on an upper end of the oxygen gun to protect the oxygen gun for a long 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 widely used pyrometallurgical methods, 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. However, the problem...

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

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