Active basic powders Refractory Materials Iron and steel smelting
We offer a series of covering flux products including both fine-grained powders and hollow granulated fluxes, so it’s possible for customer to select a suitable material according to operational parameters of each specific application.
Generally for tundish application factors affecting product performance result to be steel grade, exposed steel surface to be covered, casting time, and sequence index. Regarding ladle applications, critical factors are chiefly the amount and the characteristics of the refining slag.
Increasing demand of better quality steel and subsequent use of high performance basic tundish lining material boosted researching and developing of active basic tundish powders assuring high covering, insulating properties and low corrosion activity.
Moreover, effective NMI (non-metallic inclusions) absorption capability is provided by specific viscosity and surface tension of molten slag layer in direct contact with molten steel.
Plant experience in using these active basic tundish powders gave improved steel cleanness.
Insulating MgO-based covering fluxes
Active basic powders
We offer two types of active basic powders:
Active basic powders for tundish (CaO-based) in fine-grain powders and granulated form to maximize absorption of NMI.
Calcium aluminate based material is well known to give metallurgical active slags able to prevent sulphur pick up to the steel. It offers the potential for oxide pick-up and protection against re-oxidation. It is a material obtained by complete melting in high-capacity furnaces of bauxite and limestone. Because such materials have poor insulating properties, it is necessary to add an additional insulating compound on top.