US PATENT SUBCLASS 75 / 576
.~.~.~.~.~.~.~ Using both a solid carbonaceous fuel (e.g., coke, etc.) and a fluid (e.g, natural gas, etc.)

Current as of: June, 1999
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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  DF  .~.~.~.~.~.~ In shaft furnace (e.g., cupola, etc.) {6}
576.~.~.~.~.~.~.~ Using both a solid carbonaceous fuel (e.g., coke, etc.) and a fluid (e.g, natural gas, etc.)

DEFINITION

Classification: 75/576

Using both a solid carbonaceous fuel (e.g., coke, etc.) and a

fluid fuel (e.g., natural gas, etc.):

(under subclass 573) Process which employs a solid carbonaceous fuel (e.g., coke, etc.) and a fluid fuel (e.g., natural gas, etc.).

(1) Note. The solid carbonaceous fuel is usually charged to the furnace along with the metal to be melted and the fluid fuel is injected through the tuyeres along with the combustion air.