Magnesia Chrome Brick

AMR series of magnesia-chrome bricks are composite basic refractory products, made from magnesite and chromite burned at high temperature or ultra-high temperatures. The products show the features of excellent resistance against slag, high fired strength, good erosion resistance and thermal shock resistance. They can be applied in AOD/VOD refining furnace, DH/RH degassing device, and lining of nonferrous metal converter and cement kilns.

Magnesia-Chrome Brick
Brand	HG-8A	HG-8B	HG-12A	HG-12B	HG-16A	HG-16B	HG-20A	HG-20B	HG-22
MgO % Min.	65	60	60	55	50	45	45	40	46
Cr₂O₃ % Min.	8	8	12	12	16	16	20	20	22
Apparent Porosity % Max.	20	20	20	20	20	23	20	23	20
Cold Crushing Strength MPa Min.	35	30	35	30	35	30	35	30	35
Refractoriness under Load ℃ Min.	1620	1550	1620	1580	1620	1580	1640	1580	1600

Direct-Bonded Magnesiate-Chrome Bricks
Brand	HDB-4	HDB-6	HDB-8A	HDB-8B	HDB-12A	HDB-12B	HDB-16A	HDB-16B	HDB-18A	HDB-18B
MgO % Min.	80	75	74	74	66	66	60	60	58	58
Cr₂O₃ % Min.	4	6	8	8	12	12	16	16	18	18
SiO₂% Max.	2.0	2.0	1.5	2.0	1.5	2.0	1.5	2.0	1.5	2.0
Apparent Porosity % Max.	18	18	18	18	18	18	18	18	18	18
Cold Crushing Strength MPa Min.	40	40	40	35	40	35	40	35	40	35
Refractoriness under Load ℃ Min.	1600	1600	1600	1600	1600	1600	1600	1600	1600	1600

	Semi-Rebonded MgO-Cr₂O₃ brick				Rebonded MgO-Cr₂O₃ brick
Brand	HSR-16A	HSR-16B	HSR-20A	HSR-20B	HR-16A	HR-16B	HR-20A	HR-20B	HR-24	HR-26
MgO % Min.	60	60	55	55	65	60	60	60	52	50
Cr₂O₃% Min.	16	16	20	20	16	16	20	20	22	24
SiO₂% Max.	1.5	1.8	1.5	1.8	1.2	1.6	1.2	1.2	1.2	1.2
Apparent Porosity % Max.	17	17	17	17	16	16	16	16	16	16
Cold Crushing Strength MPa Min.	40	35	40	35	45	40	45	40	45	45
Refractoriness under Load ℃ Min.	1750	1700	1750	1700	1750	1700	1750	1700	1750	1750

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Magnesia Chrome Brick