Anti Flaking High Alumina Bricks Introduction
The anti flaking high alumina brick is a high quality product produced by Zhengzhou Rongsheng refractory high aluminum brick manufacturer. Refractory product uses first grade high alumina bauxite clinker and ZRO2-containing synthetic material as raw refractory materials, which is prepared by high pressure molding according to a certain ratio. The refractory product has strong anti flaking ability, also has the resistance to attack by potassium, sodium, sulfur chloride and alkaline salt, low thermal conductivity and the like. It is an ideal refractory material for the transition and decomposition zone of cement kiln, can also be used for the kiln door cover of cement kiln, cooling machine and other parts.
How to Achieve Anti-flaking of Anti-Flaking High Aluminum Brick
1.There are significant microcracks around the 1ZrO2 aggregate, which has a significant gap with the surrounding corundum and mullite.
2 The outstanding ZrO2 aggregates are columnar, layered in space, there are small slits between ZrO2, and the scale is only 1~5μm, which constitutes the channel structure. This structure is superimposed and twisted, which is beneficial to stress transmission and sag.
3 The mullite is excellent in development and is fibrous. It is interwoven with ZrO2 and corundum in space to form a composite reinforcing structure. Obviously, when ZrSiO4 differentiates at high temperature, refractory brick reacts with surrounding A12O3 to form ZrO2 and mullite. The presence of ZrO2 crystals hinders the growth of fibrous mullite crystals and columnar corundum, and is wrapped by it, so it is around ZrO2. Chaotic state.
4 The petrographic analysis indicates the interweaving of corundum and mullite structure. ZrO2 intervenes between them, there are microcracks around it. The larger ZrO2 crystal itself and the surrounding radial microcracks.
Anti Flaking High Aluminum Brick Features
1.Excellent resistance to high temperature and resistance to strong corrosion.
2.Anti Flaking High Alumina Brick has certain mechanical strength, conflict resistance and outstanding thermal shock resistance.
3.High alumina refractory brick have long service life.
After the selection of anti shedding high alumina bricks, because of the long operating cycle, the economic benefits have been improved accordingly, the number of repairs has been reduced, the labor intensity of workers has been reduced, the environmental pollution of used refractory bricks has been reduced, thus creating certain social benefits.
The anti flaking high alumina brick has more than four times the life of clay fire brick NZ-40, more than 12 times that of Shenggang steel clay brick CN-40, more than twice of blast furnace clay brick GN-42, and it is phosphate combined. more than 4 times that of high alumina bricks is more than 2.5 times that of imported kiln linings.
The anti-flaking high alumina brick is a new type of refractory material independently developed by China and has reached the international advanced level. This refractory brick has excellent physical and chemical goals: thermal shock stability at 1000 degrees > 40 times, refractoriness of 1780 degrees, load softening temperature of 1470 to 1520 degrees, low thermal expansion rate, low thermal conductivity, anti-wear and corrosion resistance, Replaces refractory data for all parts of the large new dry kiln firing zone.
The use of anti-flaking high aluminum bricks, High alumina refractory brick is widely used in China's new dry process kiln, Libo kiln and wet-process kiln. The parts used include kiln door covers, ascending flue, cooling belts, safety belts, transition belts, rear and side walls of the cooler, and curved roofs. In the application of cement kiln, the rear wall and side wall of the cooler, the transition zone and the transition zone are adjacent, the cooling zone, the differentiation zone, the kiln door cover and the kiln mouth. In the pre-differentiation kiln system, the differentiation furnace, the smoke chamber and other parts are extended from the tail end of the transition zone to the tail of the kiln, according to the characteristics of various kiln production, until the parts that are not acceptable for the alkali resistant insulation brick are built.
Difference Between Anti-shedding High Aluminum Brick and General High Aluminum Brick
Compared with traditional high alumina bricks, anti-shedding high aluminum bricks have excellent thermal shock stability, high strength, chemical corrosion resistance, low thermal expansion coefficient, low thermal conductivity, low firing temperature, comprehensively improved data function, and greatly reduced energy. The problem can be clarified from the following aspects.
1. Lower the firing temperature to 150~C. Because of high temperature firing and heat preservation, especially after refractory data burning at more than 1450℃, the energy consumption is huge. According to the current high aluminum brick 300,000 t/a, the estimated coal consumption can save 50,000 t/a.
2. Compared with the conventional high alumina bricks, the thermal conductivity of the anti-shedding high-aluminum bricks is 2/3 of the former, or even lower, compared with the magnesia chrome refractory bricks, as long as 1/3~2/3. Compared with adjacent alkaline bricks, the anti-shedding high-aluminum bricks have a surface temperature of 75-98 ℃, and the initial calculation can save nearly 2000 t/a of standard coal. Energy saving and economic benefits are considerable.
3. Traditional high alumina bricks cannot enter large scale dry process kiln. Because the service life is too low, repairing and stopping kiln frequently generate considerable energy loss and economic loss. What's more remarkable is that it can't beat the inherent shortcomings of using it in harsh parts.
