Blast furnace

Abstract

The invention discloses a blast furnace. The blast furnace comprises a furnace body, supporting plates, a refractory brick layer, a fire gate, a ring-furnace hot air tube, a hot air branch tube, a hotair tube, a slag outlet, an iron outlet, a charge hole, a waste gas tube, a dust remover, a cooling water tank, a hot blast heater, a gas inlet tube, an air blower, a conveyor belt, a storage channeling slot, a discharge hopper, a cooling tube, a furnace base, a baffle plate and a spring, wherein the supporting plates are fixedly arranged on the side wall of the inner cavity of the furnace body from top to bottom; the side wall of the inner cavity of the furnace body is built with the refractory brick layer; the thickness of the refractory brick layer is a bit greater than width of the supporting plates and covers the supporting plates; the fire gate is fixedly arranged in the inner cavity of the furnace body; and the ring-furnace hot air tube is arranged on the outer side part of the furnace body. Compared with the prior art, the blast furnace has the advantages that connecting tightness between the refractory brick layer and the inner wall of the furnace body can be improved, raw material combusting and melting efficiency and effect are improved, in-batch feeding efficiency and effect of the raw materials are improved, energy consumption of a boiler is reduced, and environment-friendly performances of the blast furnace are improved.

Description

【Technical field】 [0001] The invention relates to the technical field of metal smelting equipment, in particular to a blast furnace. 【Background technique】 [0002] The blast furnace is made of steel plate as the furnace shell, and the shell is lined with refractory bricks. From top to bottom, the blast furnace body is divided into five parts: the furnace throat, the furnace body, the furnace waist, the furnace bosh, and the hearth. Due to the good technical and economic indicators of blast furnace ironmaking, simple process, large production capacity, high labor production efficiency, and low energy consumption, the iron produced by this method accounts for the vast majority of the world's total iron production. Blast furnaces are used to smelt pig iron and castings. The main equipment for iron and steelmaking. After the reduction reaction in the blast furnace, the iron ore is reduced to metallic iron. At this time, the state of the iron is a molten iron and slag. Metal ...

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Problems solved by technology

[0003] The refractory brick layer of the existing blast furnace is directly built in the furnace body. Since the furnace body is designed in the shape of a pillar platform with a thin top and a thick bottom, and the refractory brick layer is in plane contact with the inner wall of the furnace, the refractory brick layer and the furnace body are in contact with each other. If the inner wall is not tightly connected, the refractory brick layer is likely to collapse as a whole, causing potential safety hazards. In addition, the iron ore, coke, and slag-making flux loaded from the top of the furnace during the ironmaking process are too fast to fall from the The time for the preheated air blown into the lower part of the furnace along the tuyeres around the furnace to contact with the iron ore, coke, and slagging flux is too short, so it is difficult to fully burn and melt the iron ore, coke, and slagging flux, resulting in A lot of raw materials are wasted and the purity of the molten iron produced is not high enough. In addition, since the iron ore, coke, and slagging flux need to be loaded into the furnace body in batches during the blast furnace ironmaking process, the iron ore, coke, and slagging flux The flux is distributed in layers in the furnace body. The existing method is to send iron ore, coke, and slag-forming flux into the furnace body through multiple conveyor belts. This not only increases the energy consumption of the blast furnace, but also multiple conveyors There is inconsistency when the belt is working, resulting in an unsatisfactory layering effect of materials in the furnace body

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