普通镁铬砖 Common Magnesia-chrome Brick

项目Item	MG-4	MG-8	MG-12	MG-16	MG-20
MgO(%) ≥	70	65	60	50	42
Cr2O3(%) ≤	4	8	12	16	20
显气孔率(%) Apparent porosity ≤	20	20	20	19	19
常温耐压强度(Mpa) ≥ Cold crushing strength	35	35	35	35	35
0.2Mpa荷重软化开始点(℃) ≥ 0.2Mpa refractoriness under load	1560	1580	1580	1610	1640
热震稳定性(Time) ≥ Thermal shock stability	5	5	5	5	5

直接结合镁铬砖 Direct-bonded Magnesia-chrome Brick

项目 Item	ZMG-4	ZMG-8	ZMG-12	ZMG-16	ZMG-20
MgO(%) ≥	75	70	65	60	55
Cr2O3(%) ≥	4	8	12	16	20
SiO2(%) ≤	2.5	2.0	1.5	1.5	1.2
显气孔率(%) Apparent porosity ≤	18	18	18	18	18
常温耐压强度(Mpa) ≥ Cold crushing strength	45	45	45	40	35
0.2Mpa荷重软化开始点(℃) ≥ 0.2Mpa refractoriness under load	1650	1650	1680	1700	1700
热震稳定性(Time) ≥ Thermal shock stability	6	6	6	6	6

项目Item	电熔再结合镁铬砖 Rebonded Electric Fused Magnesia-chrome Brick				半再结合镁铬砖 Semi-rebonded Magnesia-chrome Brick
	ZJMG-8	ZJMG-12	ZJMG-16	ZJMG-20	ZJMG-4	ZJMG-8	ZJMG-12	ZJMG-16	ZJMG-20
MgO(%) ≥	75	66	58	55	80	75	65	58	50
Cr2O3(%) ≥	8	12	16	20	4	8	12	16	20
SiO2(%) ≤	1.5	1.5	1.5	1.2	1.5	1.5	1.5	1.5	1.2
显气孔率(%) ≤ Apparent porosity	18	18	18	18	18	18	18	18	18
常温耐压强度(Mpa) ≥ Cold crushing strength	50	50	45	40	40	40	40	35	35
0.2Mpa 荷重软化开始点(℃) ≥ 0.2Mpa refractoriness under load	1700	1700	1700	1700	1700	1700	1700	1700	1700