P

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DIRECT REDUCTION CORP

15 patents

Top patents by PatentIndex Score

US4299694ANov 10, 1981

Method and apparatus for char separation from the discharge materials of an iron oxide reducing kiln

DIRECT REDUCTION CORP36 citations87
US4389242AJun 21, 1983

Interior arrangement for direct reduction rotary kilns and method

DIRECT REDUCTION CORP25 citations77
US4330325AMay 18, 1982

Direct reduction rotary kiln with improved air injection

DIRECT REDUCTION CORP8 citations71
US4304597ADec 8, 1981

System for control of sinter formation in iron oxide reducing kilns

DIRECT REDUCTION CORP13 citations71
US4273314AJun 16, 1981

Direct reduction rotary kiln with improved air injection

DIRECT REDUCTION CORP19 citations71
US4397569AAug 9, 1983

System for correlating a signal sensor location with a recorder printout

DIRECT REDUCTION CORP10 citations70
US4376280AMar 8, 1983

Instrument system for iron oxide reducing kilns

DIRECT REDUCTION CORP9 citations68
US4375883AMar 8, 1983

System for recycling char in iron oxide reducing kilns

DIRECT REDUCTION CORP3 citations60
US4337084AJun 29, 1982

System for recycling char in iron oxide reducing kilns

DIRECT REDUCTION CORP3 citations60
US4378241AMar 29, 1983

Method for achieving low sulfur levels in the DRI product from iron oxide reducing kilns

DIRECT REDUCTION CORP5 citations59
US4356031AOct 26, 1982

Apparatus and method for controlling the recycle char circuit in a direct reduction process

DIRECT REDUCTION CORP2 citations56
US4378244AMar 29, 1983

System for coal injection in iron oxide reducing kilns

DIRECT REDUCTION CORP5 citations55
US4354392AOct 19, 1982

Rotary kiln material sampling system

DIRECT REDUCTION CORP3 citations51
US4378243AMar 29, 1983

System for coal blowing in iron oxide reducing kilns

DIRECT REDUCTION CORP1 citations46
US4306643ADec 22, 1981

Coal feed pipe and positioner

DIRECT REDUCTION CORP1 citations45