Slurry Of Solid In Liquid Patents (Class 75/461)
  • Method of adding coal combustion enhancer to blast furnace
    Patent number: 6077325
    Abstract: In the manufacture of iron in which coke and coal are added to a blast furnace during iron manufacture, an improvement for enhancing the operation of the furnace is disclosed. A metallic element in the form of a compound thereof, the metallic element selected from zirconium, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, copper, zinc, aluminum, tin and lead is added to the coal, allowing for a reduction in the amount of coke added to the furnace.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: June 20, 2000
    Assignee: BetzDearborn Inc.
    Inventors: Muthukumaraswamy Karanai Margan, Santanu Ghosh, Indronil Sengupta, James S. McNeill
  • Ironmaking by means of a smelting shaft furnace
    Patent number: 4921532
    Abstract: A method of ironmaking by means of a smelting shaft furnace including the steps of supplying iron ore and coke to the top of the furnace; and injecting coal and oxygen into the smelting zone of the furnace to promote combustion, to control reaction temperature and provide heat for smelting, the quantities of coal and oxygen injection being within the range of 0.7 to 1.7 of stoichiometric conditions with respect to combustion to carbon monoxide and hydrogen.
    Type: Grant
    Filed: May 12, 1989
    Date of Patent: May 1, 1990
    Assignee: British Steel Corporation
    Inventors: Martin J. Corbett, Richard B. Smith