Method for overhauling fire-resistant material for annular air duct and chute in coke dry quenching furnace

Abstract

The invention provides a method for overhauling a fire-resistant material for an annular air duct and a chute in a coke dry quenching furnace. A furnace body is divided into a pre-storage chamber, the annular air duct, a chute area and a cooling chamber; and brick supporting rib plates and expansion seams are arranged on a pre-storage section and the annular air duct. The method is characterized by comprising the following steps of: a, erecting a protection platform in the furnace and preparing construction equipment; b, erecting a scaffold for taking apart bricks; c, dismounting a part of the chute and the annular air duct; d, cleaning the furnace; e, constructing the chute; f, constructing the annular air duct; and g, dismounting the scaffold and igniting to bake the furnace. The method for overhauling the fire-resistant material for the annular air duct and the chute in the coke dry quenching furnace provided by the invention has the advantages of reasonable design of construction step, simplicity in operation, safe and reliable engineering quality, and reduction of the engineering construction cost.

Description

technical field [0001] The invention relates to a method for overhauling the refractory material of a kiln, in particular to a method for overhauling the refractory material of a CDQ furnace ring air duct and ramp. Background technique [0002] In recent years, my country's iron and steel industry has developed rapidly, and the expansion of steel production scale has led to a rapid increase in the demand for coke. At the same time, with the development of society, environmental protection and energy requirements are getting higher and higher. More and more steel mills in my country are using dry process Coke quenching device. The dry quenching coke oven masonry belongs to the vertical kiln structure, which is a drum-shaped vertical furnace masonry in a negative pressure state. From top to bottom, the furnace body can be divided into a pre-storage chamber, an annular air passage, a chute area and a cooling chamber. Brick plates are used to separate the CDQ furnace lining ref...

AI Technical Summary

Problems solved by technology

The maximum working temperature of the CDQ furnace lining can reach 1050°C. Judging from the current use of the CDQ furnace, the life of the CDQ furnace lining is relatively short during the CDQ production process, and problems often occur in the furnace lining, which affect production. Due to various reasons Influence, after 5 to 6 years of production of the refractory bricks in the chute of the CDQ furnace and the surrounding air duct, the chute breaks and the overhead bricks peel off; the refractory bricks in the surrounding air duct break and collapse, making it impossible to carry out normal production

The known maintenance method for CDQ furnace ring air duct and ramp refractories is to completely remove the CDQ furnace lining refractory materials and re-build them, resulting in production shutdown, waste of refractory materials and construction costs

[0003] Therefore, there are above-mentioned inconveniences and problems in the known CDQ furnace ring air duct and ramp refractory maintenance methods

Images