Pouring Molten Iron(fe) Into Molten Slag (i.e., Aston Process) Patents (Class 75/439)
  • Patent number: 7585350
    Abstract: A process for producing a ferronickel product from a mixed nickel iron hydroxide product, said process including the steps of: providing a mixed nickel iron hydroxide product; pelletising the mixed nickel iron hydroxide product to produce nickel iron hydroxide pellets; calcining the nickel iron hydroxide pellets to produce mixed nickel iron oxide pellets; and reducing the nickel iron oxide pellets with one or more reducing gases at high temperatures to produce ferronickel pellets.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: September 8, 2009
    Inventors: Alexey Duarte, Houyuan Liu, Ivan Petkov Ratchev
  • Publication number: 20030075019
    Abstract: In a method for dechroming and/or denickelifying liquid slags or slag mixtures, in which the liquid slag is charged onto a metal bath, in particular an iron bath, and reduced by feeding carbon or carbon carriers, the carbon feed into the metal bath is effected until a decrease of the Cr and/or Ni oxide contents of the slag to a value of between 0.8 wt.-% and 0.2 wt.-%. As the pregiven Cr oxide content range of the slag is reached, reductants having higher reduction potentials such as, e.g., Al, Ca, Si, Fe—Si or Ca—Si are added in order to lower the Cr and/or Ni oxide contents to below 0.15 wt.-%, preferably below 0.08 wt.-%.
    Type: Application
    Filed: October 28, 2002
    Publication date: April 24, 2003
    Inventor: Alfred Edlinger