Furnace lining maintenance method generally speaking, there are grouting lining, cold spray technology, furnace shell hole opening technology and remote control technology.
Grouting lining technology can be widely used for the focus of a short-term fix shaft and Bosh area. It is a means of prolonging the life of, but must be in certain conditions repeat construction to maintain the thickness of the lining. Different furnace body parts of the use of refractory materials are also different, the pressure of mud to the success of the grouting technology is crucial.
The advantage of cold spray technology is that the inner wall of blast furnace can be cleaned thoroughly. And can make the bond between old and new refractory materials is better, and it can form well lining structure, make the blast furnace smooth, but the technology has the shortcomings of long time-consuming.
The furnace shell hole with the lance gunning is commonly used in the damaged lining furnace shell holes, with a lance from the outgoing furnace damage parts of spray repair. This method
can be used to spray up speed, and the short time is short, but it is only suitable for the local damage.
can be used to spray up speed, and the short time is short, but it is only suitable for the local damage.
Remote control is the use of the advanced technology in the development of blast furnace at home and abroad in recent years, remote control need time is short, wide range, but the technical control complex.
Grouting lining technology requirements of refractories consistency must be appropriate, for cold spray repair, furnace shell hole using guns gunning and remote control gunning, refractory materials under high temperature and normal temperature attachment is good, can continuous rapid formation of a certain thickness of coating layer, spray coating tightly bond into a dense and do not fall off, fast drying and warming.
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