Production process of high alumina brick

It is well known that high alumina brick is one of the most widely used refractory materials, and high alumina bricks and clay bricks are the same as the basic same method. The process of crushing, mixing, molding, drying, sintering, and testing, packaging, etc.. The production practice shows that the high alumina clinker in the crushing before the strict selection and classification, low temperature and its pressure to withstand a good but high temperature, a slight reduction in the kiln, and the 1 meters, while the silicon brick can be as high as 1.7 meters. There are only some process parameters to be different. And classification of storage using bauxite and clay together with fine grinding method can improve the quality of products.

Raw materials and technology: mineral mainly consists of Mo mullite and corundum phase and blast furnace with corundum mullite brick using artificial electric melting or sintering corundum and Mo mullite raw materials as the main raw material, through high pressure shaping and high temperature sintering, mineral mainly consists of mullite. Features: the products have apparent porosity rate is low; load softening point, high creep resistance and chemical corrosion resistance excellent characteristics. Features: the product has the appearance of white, size accurate, with excellent high temperature physical properties and resistance to chemical erosion. Uses: mainly used for blast furnace bottom and hearth, is one of the advanced large blast furnace and ceramic cup material.

High alumina brick and clinker clay brick production process is similar differences. Uses: large blast furnace with advanced ceramic cup “one of the materials and hot blast stove industrial furnace in high-grade refractory material can be used. Raw materials and technology: blast furnace with mullite brick using artificial electric melting or sintering Mo mullite raw materials as the main raw material, through high pressure shaping and high temperature sintering is ingredients in a higher proportion of clinker can be as high as 90% ~ 9% clinker before breaking for classification is chosen, screened in addition to iron firing temperature is higher, such as high alumina brick tunnel kiln firing average 1500 ~ 1600 DEG C.

Requirements of refractory materials for blast furnace lining repair

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 methodcan 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.