Invention Grant
- Patent Title: Green process for the preparation of direct reduced iron (DRI)
- Patent Title (中): 绿色工艺制备直接还原铁(DRI)
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Application No.: US13584122Application Date: 2012-08-13
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Publication No.: US08728195B2Publication Date: 2014-05-20
- Inventor: Bhagyadhar Bhoi , Barada Kanta Mishra , Raja Kishore Paramguru , Siddharth Kumar Pradhan , Partha Sarathi Mukherjee , Sambita Sahoo , Snigdha Priyadarshini , Priyanka Rajput , Subir Kumar Das
- Applicant: Bhagyadhar Bhoi , Barada Kanta Mishra , Raja Kishore Paramguru , Siddharth Kumar Pradhan , Partha Sarathi Mukherjee , Sambita Sahoo , Snigdha Priyadarshini , Priyanka Rajput , Subir Kumar Das
- Applicant Address: IN New Delhi
- Assignee: Council of Scientific & Industrial Research
- Current Assignee: Council of Scientific & Industrial Research
- Current Assignee Address: IN New Delhi
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Priority: IN2286/DEL/2011 20110812
- Main IPC: C21B13/12
- IPC: C21B13/12

Abstract:
Direct reduced iron (DRI) is obtained from iron ore by reduction using microwave assisted low temperature hydrogen plasma. The process includes steps of: (a) loading iron ore onto a sample holder (b) placing the sample holder inside a chamber followed by evacuating the chamber; (c) introducing hydrogen gas in the chamber at flow rate ranging between 100-500 standard cubic centimeters (sccm) followed by heating the sample holder and the iron ore at a temperature ranging between 300-800° C., a pressure ranging between 20-100 torr and a microwave power ranging between 500-1500 W to obtain direct reduced iron; and (d) cooling the direct reduced iron obtained in step (c) by flowing hydrogen at flow rate of about 300 sccm.
Public/Granted literature
- US20130047782A1 GREEN PROCESS FOR THE PREPARATION OF DIRECT REDUCED IRON (DRI) Public/Granted day:2013-02-28
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