Top-blowing and bottom-blowing dual-purpose smelting device

Abstract

The invention discloses a top-blowing and bottom-blowing dual-purpose smelting device which comprises a converter, a converter cover, a support, a driving mechanism for driving the converter to rotate and a converting mechanism, a converter body of the converter is spherical, the converter is rotatably connected with the support, a refractory lining is arranged in the converter, a discharging pipe for discharging smoke is arranged at the connecting position of the converter and the support, the converting mechanism comprises a top-blowing pipe, a bottom-blowing structure and an air-inlet pipe, the top-blowing pipe and the bottom-blowing structure are both fixed to the converter cover, the top-blowing pipe and the converter cover are coaxially arranged, the top-blowing pipe is provided with a fireproof wrapping layer, the bottom-blowing structure is arranged at the inner side of the converter cover, the bottom-blowing structure is cylindrical and can be inserted into a converter opening of the converter, the outer wall of the bottom-blowing structure is tightly attached to the inner wall of the converter opening, the bottom-blowing structure is made of the same material as the refractory lining, a plurality of air holes are reserved in the bottom-blowing structure, all the air holes communicate to the air-inlet pipe, the converter cover and the converting mechanism can synchronously move along with rotation of the converter, and the converting mechanism is further provided with a pipeline control mechanism used for limiting the movement path of the air-inlet pipe.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a top-blowing and bottom-blowing dual-purpose smelting device. Background technique [0002] Converter Steelmaking (ConverterSteelmaking) uses molten iron, scrap steel, and ferroalloy as the main raw materials. It relies on the physical heat of the molten iron itself and the heat generated by the chemical reaction between the components of the molten iron to complete the steelmaking process in the converter without the aid of external energy. It is used in the production of carbon steel, alloy steel and the smelting of copper and nickel. According to the refractory material, the converter is divided into acidic and alkaline. According to the part where the gas is blown into the furnace, there are top blowing, bottom blowing and side blowing. According to the type of gas, it is divided into air converter and oxygen converter. [0003] The top-blowing method is to insert an oxygen la...

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Problems solved by technology

[0008] However, the existing compound-blowing converters generally include a furnace mouth for top blowing and a bottom blowing gas supply structure at the bottom. The bottom blowing gas supply structure directly opens gas supply holes on the furnace body. During the blowing process, the furnace body is kept Fixed, that is, the top blowing device and the bottom blowing device cannot follow the rotation of the converter, resulting in a certain dead zone of stirring in the furnace. Once the blowing starts, it cannot be easily adjusted, and the flexibility of use is poor; the top blowing system and the bottom blowing system are separated from each other , not only the structure is complicated, the operation is complicated, but also the difficulty of on-site construction layout is increased

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