Carbon-free refractories for ladle working lining
Carbon-free refractories are high quality, environmental friendly and energy-saving materials developed as ladle working lining for low-carbon and ultra-low carbon steel production. Those refractories are characterized with high strength, high erosion resistance, high corrosion and penetration resistance and long service life. As the matrix is composed of calcium aluminate cement, superfine powder and in-organic additive, there is no generation of toxic gaese in pre-firing and in service, which is environmentally friendly and at same time free of H pick up in molten steel. As there is no carbon materials in the product, C pick up by molten steel is eliminaten and the the decrease of molten steel temperature is less due to better thermal insulation given by low thermal conductivity, which is help for energy saving.
There are three types of carbon-free refractory products for ladle working lining from LMM GROUP
- Castable: Casting, curing, drying and pre-firing are done on the site of steel mill. The lining is joint-free with longer service life
- Pre-cast shape: Casting, curing, drying and pre-firing are done on the site of LMM GROUP In comparison with castable, it does not require infrastructure for on-site casting and can shorten installation process for high ladle utilization.
- Carbon-free brick: The bricks are pressed, cured and pre-fired before delivered to steel mill for on-site brick installation
- Spraying Mix: carbon-free and environment-protected wet spraying technique is adopted to realize the cycle use of ladle lining materials, with characteristic that long life time, low cost, safe use, and environment protection.
Castables for working lining
This series of products is made from high purity corundum, magnesium aluminate spinel and fused MgO as main aggregates, superfine powder bonding technology and appropriate additives. Products are featured with good placement properties, high strength, better volume stability, better corrosion and abrasion resistance and thermal shock resistance and designed for bottom and sidewall lining of large- and medium-size ladles together with MgO-C brick for slag zone. It can also be used in slag zone of small-size ladle. In case of re-lining technique is applied, the life of ladle lining can be further prolonged and refractory consumption per ton steel produced can be further reduced, which is proven to be an effective way for low specific refractory consumption and resource saving.
Castables for working lining
This series of products is made from high purity corundum, magnesium aluminate spinel and fused MgO as main aggregates, superfine powder bonding technology and appropriate additives. Products are featured with good placement properties, high strength, better volume stability, better corrosion and abrasion resistance and thermal shock resistance and designed for bottom and sidewall lining of large- and medium-size ladles together with MgO-C brick for slag zone. It can also be used in slag zone of small-size ladle. In case of re-lining technique is applied, the life of ladle lining can be further prolonged and refractory consumption per ton steel produced can be further reduced, which is proven to be an effective way for low specific refractory consumption and resource saving.
Carbon-free brick for working lining
High purity corundum, magnesium spinel and fused MgO are selected as main aggregates for this series of bricks. Those products are used for the bottom and sidewall of ladle and featured with high corrosion resistance, better penetration resistance, good anti-spalling and abrasion resistance. The quality and performance of those products are the benchmark in china.
Working layer spraying mix
Main raw materials of this kind of product are corundum and magnesium aluminate spinel, after spraying use on the working layer surface in carbon-free ladle, characteristic appear as follow:
- Wet spraying technique has no pollute to environment and no CO2, CO when using in carbon-free ladle, and its geared to the carbon-free and environment- protected and environment-friendly technique.
- This spraying mix could be endlessly cycle used to lower the refractory material consumption and waste appearance and work with key role on the ladle continue and safety use.
- This spraying mix has no pollute to the molten steel, and, compared with the current lining materials, it has the characteristic that long lifetime, low cost, high construction automaticity, and energy conservation and environment protection. High potential value among the inland steel enterprise.