Blast furnace

Abstract

The present invention discloses a blast furnace, and comprises a furnace hearth, wherein, the furnace hearth comprises a hearth side wall, a slag-discharging port that is arranged on the upper part of the hearth side wall, and a discharging port that is arranged at the lower part of the hearth side wall; the furnace hearth is also provided with a stack water jacket that is connected with the furnace hearth; the stack water jacket comprises a plurality of blast orifices; the stack water jacket is connected with a wind jacket; the wind jacket is provided with a smoke-exhausting pipe that is arranged on the side wall of the wind jacket; the wind jacket is connected with the blast orifices; the wind jacket is connected with a furnace top wall; the furnace top wall comprises a vertical feeding pipe; the feeding pipe comprises a feeding pipe water bushing. The wind jacket is connected with the stack water jacket, and the wind jacket is connected with the blast orifices through a wind pipe; since the wind jacket can use the surplus heat of the smoke to pre-heat the air, so as to provide the hot air for the smelting reaction, the temperature at the wind port can be increased, thereby saving the fuel, and optimizing the condition of the furnace, and improving the capacity of the furnace.

Description

technical field [0001] The invention relates to a smelting device, in particular to a blast furnace. Background technique [0002] In the field of non-ferrous metal smelting, the blast furnace has a long history as a pyrometallurgical smelting equipment. Compared with the electric furnace and the rotary furnace, the blast furnace is simple in operation, high in thermal efficiency, small in investment, low in operating cost, and high in unit production capacity. The recovery rate is high, so blast furnace extraction of heavy metals has become the best choice for many enterprises in our country. [0003] Taking nickel smelting as an example, nickel has good mechanical strength and ductility, refractory high temperature resistance, and high chemical stability. It is an important raw material for manufacturing stainless steel, high-nickel alloy steel and alloy structural steel. At present, there are two types of nickel resources available for human development and utilization, ...

AI Technical Summary

Problems solved by technology

[0007] Under the existing technology, the tuyere sends cold air into the blast furnace. In order to provide sufficient oxygen, the blast furnace volume can reach 70m 3 / (m 2 min) or higher, because the cold air will reduce the temperature in the tuyere area, so that the reaction cannot be fully carried out, the capacity of the blast hearth is low, and the roof of the refractory brick structure also increases the weight of the blast furnace

Moreover, because the charge enters the furnace from the feed inlet on the side wall of the furnace roof, it is easy to cause the charge to be evenly distributed. Moreover, since the charge is composed of blocks of different sizes, when charging from the side of the furnace body, small blocks are easy to slide into the furnace. The side wall of the body, which will block the tuyere, deteriorate the furnace condition, and stop the smelting reaction in severe cases

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