Prefabs for Electric Furnace Roof

The products of LMM Group have been exported to more than 90 countries, countries & areas in America, Europe, Southeast Asia, the Middle East, Africa, Asia, etc, forming strong and core competitiveness in steelmaking, continuous casting, rolling areas to supply high value-added, green, intelligent and one-stop solution and service to global customers in iron, steel, metallurgical industries, etc.

Please provide design data for special processing requirements

[vc_row][vc_column][vc_column_text]This product is prefab by the high-performance ramming mix of low cement concentration with the features of high strength and thermal shocking at high and regular temperature.


It has the advantages of long service life and great resistance against flow washing and erosion.


It is suitable for the application of triangle zone of electric furnace cover.


For the electric furnace cover, LMM GROUP has a complete set of mature solutions. At present, the electric furnace cover with a diameter of 6 meters can be made as a whole. It is suitable for ordinary electric furnace, ultra-high power electric furnace, refining furnace and VD furnace.


Item LMM-1 LMM-2
Al2O3 (%) ≥80 ≥85
Cr2O3 (%) ≥1.5. ≥2.0
Bulk Density (g/cm3) 110°C*24h ≥2.9 ≥2.9
1000°Cx3h ≥2.85 ≥2.85
1500°Cx3h ≥2.85 ≥2.85
Cold Cracking Strength(MPa) 110°Cx24h ≥6 ≥6
1000°Cx3h ≥8 ≥10
1500°Cx3h ≥15 ≥15
Cold Crushing Strength(MPa) 110°Cx24h ≥30 ≥40
1000°Cx3h ≥50 ≥60
1500°Cx3h ≥60 ≥65

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As professional one-stop solution provider, LIAONING MINERAL & METALLURGY GROUP CO., LTD(LMM GROUP) Established in 2007, and focus on engineering research & design, production & delivery, technology transfer, installation & commissioning, construction & building, operation & management for iron, steel & metallurgical industries globally. 

Our product have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, EZZ steel etc. We do OEM for Concast and Danieli for a long time

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