This is our fourth generation refractory balls. Using nano technology, we developed the micro powder bond corundum refractory ball. This can improve the blast temperature up to 1250℃. The service lifetime can be up to blast furnace' s first generation life and can be used several times. The energy saving effect is great. This is the best choice of modern ball-type hot blast stove.
 

			HXGD-80
Al2O3(%)≥			80
Fe2O3(%)≤			1.5
Refractoriness (℃)≥			1790
Apparent Porosity (%)≤			19
Bulk density (g/m³ )≥			2.8
Cold Crushing strength(N/Ball)≥			40000
Permanent Linear change(%)(1450℃× 2h)			0-0.2
Refractoriness under load(℃)≥			1580
Hot temperature creep rate(%)≤ (0.2Mpa× 1400× 5h)			0.2
Thermal conductivity(W/M. K)1100℃≥			0.6
Thermal shock resistance(Times)≥ (1100℃-water cooling)			26
Application			Ball-type hot blast stove