Comprehensive Molten Aluminum Processing System

Abstract

Molten Aluminum and its Alloys are generally subjected to Degassing and Grain Refining before casting. Degassing is carried out to reduce the Hydrogen gas content. On-line Degassing is among the popular practice and is carried out with the help of equipment like SNIF, LARS etc. Grain refining is carried out for improving the micro-structure of the cast product. It involves addition of grain refiner in to the melt prior to or during the casting. Utility Patent applied vide this non-provisional patent application envisages addition of powder/s of Degasser(Hexa-chloro Ethane), as a substitute for Chlorine and/or Grain refiner; into the purging gas of an On-line Degassing system; thus accomplishing degassing and/or grain refining in one single stage with improved efficacy of respective treatments, better working conditions and lower processing cost. This invention can be adopted in any existing as well as new On-line Degassing systems.

1 . The invention titled as Comprehensive Molten Aluminum Processing System is envisaged to provide an alternative of Chlorine for on-line degassing of molten Aluminum and its Alloys. Adoption of the invention will also be cost effective and alleviate hazards associated with use of Chlorine without any loss of efficacy. 
     
     
         2 . Addition of grain refiner to the purging gas will significantly improve its dispersion in the molten metal and will not have enough time to coagulate. Thus there will be ideal conditions for grain refining, with the improved efficacy of the treatment. On a net basis, the specific consumption of grain refiner, for identical results; will be significantly lower as compared to the conventional practices. 
     
     
         3 . (canceled) 
     
     
         4 . This invention can be adopted in any existing on-line degassing systems intended for removal of Hydrogen gas of molten Aluminum and its Alloy; as also the ones to be manufactured in future.