Refractory for Cement Rotary Kiln

The environments of transition zone, burning zone and cooling zone in cement rotary kiln are severe due to high temperature from burning clinker and erosion of K,Na,Cl,S. The up size of rotary kiln and usage in waste disposal make the condition of using refractories even harsher. Yotai group developed MgO-Cr2O3 series, MgO- AlO Spinel series and non chrome series bricks for cement rotary kiln, which have achieved remarkable results. We occupy top shares in Japan refractory market, and have expanded greatly in China market as well.

Unit MgO-Cr2O3 Brick Dirdct-bonded MgO-Cr2O3 Brick
YMGe-10 YMGe-9 YMGe-8 YDMC-12 YDMC-10 YDMC-8
Apparent Porosity % 19.0 19.0 19.0 17.5 17.5 18.0
Bulk Density g/cm3 2.96 2.96 2.95 3.02 3.00 2.98
Cold Crushing Strength MPa 40 40 40 45 45 45
Refractoriness Under Load T2 1580 1580 1580 1700 1700 1680
Thermal Shock Resistance(1100℃-water) Cycles 5 5 5 6 6 6
Chemical Composition MgO % 70 70 72 70 75 77
F.C. 10 9 8 12 10 8

 

MgO- Cr2O3 Brick

A kind of silicate combined basic firebrick fit for dry cement rotary kiln less than 2000t/d in capacity

Unit Dirdct-bonded MgO-Cr2O3 Brick Hercynite-Brick MgO-Al2O3-ZrO2-Brick
YU38 YU36T YU34 YSP-SMT YNC-1
Apparent Porosity % 17.5 18.0 18.0 16.5 17.0
Bulk Density g/cm3 3.03 3.00 3.00 2.96 2.92
Cold Crushing Strength MPa 45 40 40 50 50
Refractoriness Under Load T2 1700 1700 1680 1700 1700
Thermal Shock Resistance(1100℃-water) Cycles 6 6 5 8 10
Chemical Composition MgO % 76 75 75 84 85
Al2O3
Cr2O3 10 10 10
Fe2O3 4
ZrO2 1

 

A kind of basic bricks made from purer law materials . shaped with high pressure and sintered high temperature

Unit MgO-Al2O3 Spinel Brick Hercynite-Brick
YSP-NBNY YSP-LP YSP-CTK YSP-GMT
Apparent Porosity % 17.0 17.0 17.0 16.5
Bulk Density g/cm3 2.92 2.92 2.93 2.95
Cold Crushing Strength MPa 5 50 50 55
Refractoriness Under Load T2 1700 1700 1700 1700
Thermal Shock Resistance(1100℃-water) Cycles 10 10 10 10
Chemical Composition MgO % 76 85 80 85
Al2O3  16 10 15 5
Fe2O3 4

For environmental conservation,non- chrome bricks including MgO- Al2O3,MgO- Al2O3 Spinel,Hercynite,MgO- ZrO2 were developed and are widly used in transition zone,cooling zone and burning zone to replace MgO- Cr:O brick