Vertical double-side-blowing smelting furnace

Abstract

The invention discloses a vertical double-side-blowing smelting furnace. The vertical double-side-blowing smelting furnace comprises a smelting reaction zone and an electric furnace zone. The smelting reaction zone comprises an upper section, a middle section and a lower section. Refractory bricks are laid in a steel shell of the upper section. Refractory brick side walls are provided with secondary air openings. The top faces of the four walls of the upper section are provided with furnace lids. The furnace lids are provided with a plurality of feeding holes. A smoke outlet is reserved in the end or the middle of the furnace top. Copper water jackets are adopted for all the four walls of the middle section, and the cooling water jackets of the side walls of the middle section are arranged in multiple layers. The lower section is formed by laying refractory bricks. A primary air supplying channel is formed in the lowest position of the bottommost layer of the water jackets and inclined downwards. According to the vertical double-side-blowing smelting furnace, the oxygen blowing positions closely abut against the upper plane of copper sulphate and incline downwards, and thus the thickness of a slag layer can be controlled to be about 600-800 mm. The time of produced smelted slag remaining in the furnace is much shorter than that of a deep molten bath method in the smelting process, and the slag layer is always in a stirred state, so that transverse partition films are not prone to forming in the smelting reaction zone.

Description

technical field [0001] The invention belongs to the scope of pyrometallurgy, and in particular relates to a vertical double-side blowing smelting furnace for shallow molten pool operation. Background technique [0002] At present, in the factories that use copper concentrate as raw material to produce copper, the pyrotechnic process occupies the vast majority. With the development of fire extraction process, the traditional blast furnace, reverberatory furnace, submerged heat electric furnace have been eliminated, and various furnaces for enhanced smelting have emerged and gradually improved and developed. In molten pool smelting, there are top-blown Mitsubishi Furnace, Isa Furnace and Osmet Furnace; bottom-blown ones include QLS Furnace, SKS Furnace; The side-blown ones include the Vanyukov furnace and the metallurgical furnace with the patent number ZL200820135242.1 utility model patent. [0003] The Vanyukov furnace and the metallurgical furnace with the patent number Z...

AI Technical Summary

Problems solved by technology

When smelting in a deep melting pool, the slag layer below the air outlet has a relatively quiet section, and the Fe in the slag 3 o 4 When the content is high, it is easy to form a diaphragm (viscous layer) with a thickness of 200mm to 500mm, which is sandwiched between the copper matte layer and the slag layer, which seriously affects the forward movement of the melting furnace

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