Brand\Guarantee		DHL-83	DHL-25	ZDL-20	DTL-35
MgO(%)		≥ 83	≥ 80	≥ 82	≥ 85
CaO(%)		7-9	13-15	11-13	6-8
Fe2 O3(%)		5-7	3.6-4.6	3.5-4.5	4-5.5
Al2 O3 (%)		( 0.3	( 0.3	( 0.3	( 0.3
SiO2 (%)		≤ 0.8	≤ 0.8	≤ 0.8	≤ 0.8
I.L(%)		≤ 0.4	≤ 0.5	≤ 0.5	≤ 0.5
Size (mm)		0-6	0-6	0-6	0-6
Pressure	1300℃×3h	>10	>10	>10	>9
(Mpa)
Strength	1600℃×3h	≥ 30	≥ 30	≥ 30	≥ 30
Permanent Linear Change Rate (%)	1300℃×3h	( 0.5	( 0.5	( 0.5	( 0.4
	1600℃×3h	( 2.0	( 2.0	( 2.0	( 2.0
Temperature Limit (℃)		>1800	>1800	>1800	>1800