US PATENT SUBCLASS 75 / 438
.~.~.~.~ Making wrought Iron(Fe)

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}
438.~.~.~.~ Making wrought Iron(Fe) {3}
439  DF  .~.~.~.~.~> Pouring molten Iron(Fe) into molten slag (i.e., Aston process)
440  DF  .~.~.~.~.~> Utilizing moving hearth
441  DF  .~.~.~.~.~> Directly from Iron(Fe) compound only (no metallic Iron) {1}

DEFINITION

Classification: 75/438

Making wrought Iron (Fe):

(under subclass 433) Process for making the commercial product called "wrought Iron (Fe)" which is a very low Carbon (C) (less than 0.1%) Iron intimately admixed with a slag. The conventional process heats molten pig Iron in a reverberatory furnace. The Carbon is burned out causing the Iron to become pasty, at which point it is rolled into balls and worked to remove excess slag.