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Magnesia dolomite bricks

MgO(%): 52.3～80.3; CaO(%): 13～80.3; Al₂O₃(%): 0.5; Fe₂O₃(%): 0.7; SiO₂(%): 1.2～1.3
Cold Crushing Strength (MPa): 55
Refractoriness under load (℃): 1700

Application:

Magnesia dolomite bricks as MgO-CaO basic refractory bricks, which have good resistance to elevated temperatures and high slag resistance, are mainly used for secondary refining furnace and cement kiln.

　　Magnesia dolomite bricks use dolomite sand, magnesia dolomite sand and magnesite as raw materials, adding water-free binder, being mixed, high pressure pressed and sintered in high temperature.

Index	MG15	MG20	MG25	MG30	MG40
MgO (%)	76.3-80.3	72.3-76.3	66.3-70.3	62.3-66.3	52.3-56.3
CaO (%)	13-17	18-22	23-27	28-32	38-42
Al₂O₃ (%)	0.5	0.5	0.5	0.5	0.5
Fe₂O₃ (%)	0.7	0.7	0.7	0.7	0.7
SiO₂ (%)	1.3	1.3	1.3	1.3	1.2
Bulk density (g/cm³)	3.03	3.03	3.03	3.03	3.0
Apparent porosity (%)	8	8	8	8	8
Cold Crushing Strength (MPa)	55	55	55	55	55
Reheating linear change (%)		-0.35		-0.61
Refractoriness under load (℃)	1700	1700	1700	1700	1700
Thermal Expansion (%)
800℃	0.8~1.0	0.8~1.0	0.8~1.0	0.8~1.0	0.8~1.0
1200℃	1.35~1.6	1.35~1.6	1.35~1.6	1.35~1.6	1.35~1.6
1600℃	1.8~2.0	1.8~2.0	1.8~2.0	1.8~2.0	1.8~2.0