A method for integral repair and pouring of blast furnace tuyeres

Abstract

The invention relates to an integral repairing and pouring method for a blast furnace tuyere belt, belonging to the technical field of blast furnace maintenance. Including the following steps, 1), prepare several steel plates as templates, take two upper and lower support tension positions in the middle of the steel plate to set tension points, and press the middle of the steel plate into an arc; 2), pull the steel plate from the tuyere to the Outside the furnace, a support beam is placed in the middle of each tuyere outside the furnace, and the outer end of the inverted chain is fixed on the support beam to tighten the steel plate; 3) After each steel plate is installed in place, the butt joint is formed, and then the The adjacent steel plates are welded firmly, and the inner ring-shaped template is formed on the inner wall of the furnace; 4), the refractory material is poured between the inner ring-shaped template and the inner wall of the furnace. The method can be implemented quickly, can save a lot of manpower and material resources for construction, is convenient for disassembly and assembly, and greatly reduces the overall cost.

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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