Method for forming molten pool through side-blown smelting furnace in thermal state

Abstract

The invention provides a method for forming a molten pool through a side-blown smelting furnace in a thermal state. The method comprises the steps that the side-blown smelting furnace is dried according to a set furnace drying curve; a smelting backing material is added into the side-blown smelting furnace with furnace drying completed, a primary air opening of the side-blown smelting furnace is closed, and a combustor is inserted into the side-blown smelting furnace to melt the smelting backing material so as to form an initial molten pool; and smelting raw materials are continuously added into the initial molten pool, oxygen-enriched air is sprayed into the side-blown smelting furnace through a spray gun inserted into the position below the liquid level in the side-blown smelting furnace, the smelting raw materials are continuously molten to form a molten pool, and after the liquid level of the molten pool is higher than the primary air opening, the primary air opening is opened fornormal production. According to the method, the molten pool can be quickly and safely formed, the production efficiency is improved, the blow-in time is shortened, smelting reaction heat is fully utilized, and fuel consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal metallurgy, in particular, the invention relates to a method for creating a melting pool in a hot state of a side-blown smelting furnace. Background technique [0002] Side-blowing smelting is a molten pool smelting process, and its core process equipment is a side-blowing smelting furnace. Materials such as copper concentrate or solid waste are continuously fed into the furnace through the feeding system from the feeding port on the roof of the side-blown smelting furnace, and oxygen-enriched air is blown into the slag layer in the furnace from the primary tuyeres on both sides of the furnace body, and the materials are strongly stirred. Rapid melting and complete chemical reaction in the molten pool. The side-blowing smelting furnace needs the liquid surface of the molten pool to be submerged in the tuyere once before the wind can be blown and the normal production can be carried out....

AI Technical Summary

Problems solved by technology

[0003] At present, there are three commonly used methods for starting the molten pool of the side-blowing smelting furnace: (1) The blast furnace molten pool method, which uses solid materials to form a material column in the furnace and blows air from the primary tuyere. This method is easy to react during the reaction process. Excessive carbon monoxide is produced, causing an explosion, and it takes a long time to build the molten pool and consumes a large amount of coke; (2) After melting the material in an electric furnace, transfer the melt to the side blowing furnace with a ladle to form a molten pool. This method requires an electric furnace and consumes A large amount of electric energy and electrodes, and the amount of molten material supplied is limited; (3) high-temperature melting method, which uses high-temperature melting materials burned by fuel until the liquid level of the molten pool is immersed in the primary tuyere of the side-blowing furnace. The disadvantage is that the fuel consumption is large, Material melting time is long

Images