Introduction

1.Made by bauxite clinker and binder through Crushing,Mixing,Shaping,Drying and high temperature Sintering. 2.Al2O3 content is 48%-80%. 3.Main mineral components are corundum and mullite phases. 4.Refractoriness is usually above 1770℃,refractoriness under load is 1420-1550℃.It is a neutral refractory material so that it enjoys excellent resistance to acid and alkali corrosion. 5.Working temperature:1350℃ -1650℃.

Feature

1.High-temperature endurable; 2.Good thermal shock resistance; 3.High cold crushing strength; 4.Good resistance to abrasion and corrosion; 5.Good thermal spalling resistance; 6.High mechanical strength; 7.Good volume stability at high temperature;

Item	Index
International code name	SK35	SK36	SK37	SK38	SK40
Al2O3 %	>=48	>=55	>=65	>=75	>=80
Fe2O3 %	<=2	<=2	<=2	<=2	<=2
Refractoriness ℃	>=1750	>=1770	>=1790	>=1790	>=1790
Apparent porosity %	<=22	<=22	<=23	<=23	<=21
Cold crushing strength Mpa	>=39	>=44	>=49	>=54	>=65
Refractoriness under load(0.2MPa) ℃	>=1420	>=1470	>=1500	>=1520	>=1530
Reheating Linear Change (1500℃ 2h) %	+0.1~ -0.4 *1450℃	+0.1~ -0.4	+0.1~ -0.4	+0.1~ -0.4	+0.1~ -0.4