Blast furnace tuyere zone integral repairing and pouring method

Abstract

The invention relates to a blast furnace tuyere zone integral repairing and pouring method, and belongs to the technical field of blast furnace maintenance. The method comprises the following steps: 1) preparing a plurality of steel plates as templates, setting tension points at two upper and lower support tension positions in the middles of the steel plates, and pressing the middles of the steelplates into arcs; 2) pulling the steel plates out of the furnace from the tuyeres by using chain blocks, erecting a support beam in the middle of each tuyere outside the furnace, and fixing the outerends of the chain blocks on the support beams to tension the steel plates; (3) after each steel plate is installed in place, forming the steel plates in a butt joint mode, then firmly welding the adjacent steel plates, and forming an internal girdle formwork on the inner wall of the furnace, and (4) pouring a refractory material between the internal girdle formwork and the inner wall of the furnace. The method can be rapidly implemented, a large amount of manpower and material resources can be saved for construction, dismounting and mounting are convenient, and total cost is greatly reduced.

Description

technical field [0001] The invention relates to a pouring method for integral repair of tuyere belts of blast furnaces, and belongs to the technical field of blast furnace maintenance. Background technique [0002] During the production process of the blast furnace, due to the thermal stress in the furnace, or the unreasonable structure of the brick lining, poor material, especially the frequent shutdown of the furnace and other factors, the brick lining will be damaged to a large extent, and the damage will cause the furnace type in this hot zone Defects, poor air supply system and poor slag formation, serious gas leakage from the tuyere, frequent damage to the tuyere cover, etc., need to be repaired after the shutdown of the furnace. Belt cleaning and overall pouring. [0003] In the traditional pouring process of the tuyere belt, the measurement will be carried out first, and the scaffolding will be built from the bottom of the furnace to the tuyere belt, and a platform ...

AI Technical Summary

Problems solved by technology

[0002] During the production process of the blast furnace, due to the thermal stress in the furnace, or the unreasonable structure of the brick lining, poor material, especially the frequent shutdown of the furnace and other factors, the brick lining will be damaged to a large extent, and the damage will cause the furnace type in this hot zone Defects, poor air supply system and poor slag formation, serious gas leakage from the tuyere, frequent damage to the tuyere cover, etc., need to be repaired after the shutdown of the furnace. Currently, a relatively simple and practical process is to repair the tuyere after shutdown belt cleaning and integral pouring

[0003] In the traditional pouring process of the tuyere belt, the measurement will be carried out first, and the scaffolding will be built from the bottom of the furnace to the tuyere belt, and a platform will be built. It is symmetrical to withstand the formwork, and the pouring space is formed according to the predetermined size before pouring. This traditional process has disadvantages in the implementation. The first scaffolding is built from a large area at the bottom of the furnace. It takes a lot of manpower and material resources to install and disassemble, and it takes a long time, and the cost calculation is high.

The second is fixed with box boards and the single-point support is not firm. During the pouring process, it is easy to change and loosen, resulting in pouring slippage, which will cause defects in time and pouring quality.

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