US PATENT SUBCLASS 75 / 573
.~.~.~.~.~.~ In shaft furnace (e.g., cupola, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
433  DF  .~.~.~ Iron(Fe) {18}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
571  DF  .~.~.~.~.~ Melting solid Iron(Fe) {4}
573.~.~.~.~.~.~ In shaft furnace (e.g., cupola, etc.) {6}
574  DF  .~.~.~.~.~.~.~> Without the use of solid, carbonaceous material (e.g., without coke, etc.)
575  DF  .~.~.~.~.~.~.~> Using Oxygen in a higher concentration than ambient air
576  DF  .~.~.~.~.~.~.~> Using both a solid carbonaceous fuel (e.g., coke, etc.) and a fluid (e.g, natural gas, etc.)
577  DF  .~.~.~.~.~.~.~> Defined composition of solid fuel other than nominal "coke"
578  DF  .~.~.~.~.~.~.~> With Calcium carbide
579  DF  .~.~.~.~.~.~.~> With Alkali metal compound

DEFINITION

Classification: 75/573

In shaft furnace (e.g., cupola, etc.):

(under subclass 571) Process wherein solid Iron (Fe) is melted in a vertical tubular furnace.

(1) Note. In this subclass the charge is predominantly (i.e., over 50 percent) Iron in the metallic state. While there may be some reduction of Iron compound (e.g., rust or ore, etc.) taking place, the majority of the molten Iron produced exists in the metallic state when added to the furnace.

SEE OR SEARCH THIS CLASS, SUBCLASS:

488, for a process of reduction of an Iron compound in a shaft furnace. In this subclass over 50 percent of the Iron product is obtained by reduction of an Iron compound.