R&D on beneficiation and sintering of iron ore at national metallurgical laboratory (NML)

Maulik, S C (1997) R&D on beneficiation and sintering of iron ore at national metallurgical laboratory (NML). Ironmaking resources and reserves estimation, (5). pp. 203-209.

Full text not available from this repository.


In spite of being rich in iron content, the characteristic high alumina content present in Indian iron ores as lateritie and/or clayey gangue has always been a problem to beneficiation. Partial removal of adhering clayey matter and fine silica to produce free flowing lumps and sand is effected by 'washing', but it can nor remove laterite and sometimes the ratio of alumina/silica becomes worse. Studies have shown that different gravity methods are capable of lowering the alumina content. In this regard, blue dust a fine hematitic iron ore, with very low silica and alumina is a suitable iron bearing raw material for blending with iron ore fines to reduce the alumina load in sinters, bur its fine granulometry allows its incorporation to a limited Extent (20 - 30 per cent) in Indian sinter plants. Blue dust not only improves the chemistry but also the properties of sinter Extensive studies at NML on the utilisation of blue dust have indicated that blue dust or other ultrafines like cyclone underflow from treatment of slimes can be used to a greater extent (50 per cent) in iron ore fines without affecting the sinter properties and productivity

Item Type:Article
Official URL/DOI:http://www.nmlindia.org
Uncontrolled Keywords:Iron ore; National metallurgical laboratory (NML)
Divisions:Material Science and Technology
ID Code:1061
Deposited By:Sahu A K
Deposited On:16 Jun 2010 09:27
Last Modified:12 Jan 2012 16:29
Related URLs:

Repository Staff Only: item control page