Fire bricks for pellet shaft furnace

Detailed introduction

Tangshan Guoliang Special Refractory Material Co., Ltd. produces Spherical Yang Shaft Furnace with burner bricks separately hit, pouring two kinds. There is phosphate binding and low cement binding. It is characterized by high strength and long service life, and is well received by customers.
The fire brick used for pellet shaft furnace mainly includes the following parts: the combustion chamber, the guide wind wall, the furnace wall, etc. The investigation focused on the furnace wall, because the combustion chamber is less damaged, the air guide wall refractory brick since the use of large block mother button shaped refractory brick can fully meet the maintenance cycle requirements. According to the shaft furnace production process, pellet roasting is divided into pre tropical zone, roasting zone, uniform tropical zone and cooling zone. High alumina refractory bricks are used in preheating zone, baking zone and even tropics zone, and blast furnace high alumina refractory bricks are used in cooling zone.
The following improvements should be made on the basis of the construction of the fire brick for pellet shaft furnace.
1. Prefabricated slant blocks are recommended for the slant of baking zone, and large special-shaped refractory blocks are recommended for the refractory bricks with nozzle. This will not only reduce fracture and collapse, but also increase its scouring resistance.
2, it is suggested that the thickness of high alumina refractory bricks for blast furnace should be appropriately increased. Increase its scouring resistance.
3. In addition, the baking pressure and flow rate should be increased appropriately to improve the drying effect of raw balls. This can improve the air distribution in the furnace and increase the service life of lining refractory bricks.
4. It is suggested that the bricklaying of refractory lining bricks in the furnace should be studied ahead of time before the next shaft furnace overhaul, and the design requirements should be put forward. Effective construction quality supervision and inspection methods should be worked out, and the supervision responsibility should be put into practice.


Main Properties


Index

 Item

YK-1

YK-2

type

prosphate bonded based

low-cement bonded based

Al2O3,% ≥

65

65

bulk density, g/cm³ ≥

2.45

2.55

C. C .S, MPa ≥

100℃×24h

40

55

1000℃×3h

55

75

 linear change on reheating,1400℃,%

±0.5

±0.4

 球团竖炉用火口砖



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