Capital Refractories are now able to offer an extensive series of gas diffuser products for the treatment of melts across a range hot metal industries. Gas purging homogenises the melt and can contribute to the purification of the alloy. Homogenisation aims for equalisation of the analysis and temperature of the metal in the vessel. Gas purging can effect rapid distribution and dissolution of alloying and deoxidising agents and quick adjustent of casting temperature can be achieved. Reduction of deleterious gas content and separation of non - metallic inclusions,with subsequent improvement in metal quality resulting from their elimination from the melt.All Capital Refractories gas diffusers are supplied to suit the customers' requirements with respect to the metal casings and gas feed...
Capital Refractories has now incorporated their gas diffuser technology into a pressed crucible. The resultant metallurgical treatment crucible is a multi-use, isostatically pressed one-piece refractory vessel with an integral gas supply device.The granulometry of the crucibles walls and base is such that gas can easily travel through it. This allows the gas to enter the metal not just from the base but also the side walls as shown in the animation to the right. The outer wall of the crucible can be coated with an inorganic sealant to inhibit loss of gas through the external surface. Trials have indicated that these crucibles are very effective in imparting the benefits of gas diffusion to metal: homogenising the melt and removing slag particles to the surface. In many cases, there appears...