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Magnesium spinel brick (chrome-free alkaline brick)

Magnesia spinel bricks are mainly made of high-purity microcrystalline magnesia and fused magnesia alumina spinel, which are unique to Pu Nai Group.

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Refractory materials for the iron and steel industry

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Product Introduction

Magnesium spinel bricks are made of high-purity microcrystalline magnesia and fused magnesium aluminum spinel unique to Pu Nai Group as the main raw materials, with special additives added, and are made by high-pressure molding and special sintering processes. The product has compact structure, low porosity, high temperature strength, excellent thermal shock resistance and good slag erosion resistance, which can meet the requirements of BH furnace working conditions, and will not produce Cr * in use. It is an ideal environmental protection product to replace magnesium chrome brick and eliminate "chromium pollution.

Physical and chemical indicators:

Index Brand	Do not burn products Unburnedarticle		Sintered article of fired products
Index Brand	HTUMA-95.	HTUMA-93.	HTMA-10	HTMA-5
MgO+Al₂O₃ (%)≥	95	93	92	90
T (c)(%)≤	2.0	2.0
Cr₂O₃ (%) ≤	0.1	0.1	0.1	0.1
The apparent porosity A · P(%)≤	8	12	17	18
Bulk density B · D(g/cm³) ≥	3.10	3.00	2.95	2.90
Compressive strength C · C · S(MPa)≥	70	65	45	45
0.2MPa load softening temperature R · U · L(To.6 ℃)>	1700	1700	1700	1700
High temperature flexural strength H · 0 · R (1400 × 0.5h)(MPa)	15	10
Thermal shock resistance T · S · R(1100 ℃ water cooling times) ≥	4	4	10	6