Invention Grant
- Patent Title: Process for recycling of steel industry iron bearing by-products, pellet obtained in that process and use thereof
- Patent Title (中): 钢铁工业铁轴承副产品回收利用方法及其使用方法
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Application No.: US12227654Application Date: 2007-05-24
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Publication No.: US09011573B2Publication Date: 2015-04-21
- Inventor: Syed Niaz Ahsan , Fazal-Ur-Rehman Awan , Ali Al-Hazemi , Fawzi Al-Dulaijan
- Applicant: Syed Niaz Ahsan , Fazal-Ur-Rehman Awan , Ali Al-Hazemi , Fawzi Al-Dulaijan
- Applicant Address: SA Riyadh
- Assignee: Saudi Basic Industries Corporation
- Current Assignee: Saudi Basic Industries Corporation
- Current Assignee Address: SA Riyadh
- Agency: Cantor Colburn LLP
- Priority: EP06010626 20060524
- International Application: PCT/EP2007/004611 WO 20070524
- International Announcement: WO2007/134859 WO 20071129
- Main IPC: C21B13/14
- IPC: C21B13/14 ; C22B1/24 ; C21B13/00 ; C21B13/02 ; C22B1/243 ; C22B5/12 ; C22B7/02 ; C21D9/00 ; C22C38/00 ; C22B19/30

Abstract:
The present invention relates to a process for the recycling of steel industry iron bearing by-products into a shape suitable for feeding into a direct reduction furnace, comprising the steps of mixing and grinding 50 to 99 wt % of ore and pellet fines and 1 to 50 wt % of slurry, mill scale and/or bag house dust, pelletizing the mixture and indurating the pellets so obtained by heating for 5-60 minutes at a temperature in the range of 1100-1350° C.; and a pellet produced from Iron bearing waste material and having compression strength of at least 2.8 kN and/or a drop number of at least 3.
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