NDLI: Sintering Hematite of Blends Containing Magnetite orland Goethite Ores Concentrate and

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Sintering Hematite of Blends Containing Magnetite orland Goethite Ores Concentrate and

Content Provider	Semantic Scholar
Author	Yang
Copyright Year	2001
Abstract	Manysinter plants in China use magnetite concenttate and imported sintering fines in their blends. It has been found that sintering performance is improved with the addition of the sintering fines. This work studies sintering behaviour of a hematite ore (Ore B) and a geothite ore (Ore C) in biends containing 50-70 mass'/. concentrate. With addition of 3mass'/. burnt lime. sintering performance improves with increasing Ore Bor Ore CIevel in the blend. Partial substitution of Ore Cfor Ore Bin the blends did not cause significant changes in major sintering parameters. Granulation was identified as the key issue in sintering of such blends. Amethodto improve granulation efficiency wasproposed, which involves pre-granulating the sintering fines and a part of the concentrate, and then granuiating the pre-granulated materials with the rest of mix. It has been found that by using the pre-granulation technique, the productivity for blend composedof 50 mass'/• magnetite concentrate and 50 mass'/* Ore Cincreased from below 30t/m'd to around 40t/m' dat unchangedmix moisture levels. The technique also led to rises of various extent in productivity in sintering of blends containing magnetite concentrate. Ores Bor/and C. The chief reason for this is that the improved granulation efficiency improves bed permeability and shortens sintering time. Thesintering results for blends containing 50 mass'/. magnetite concentrate and 50mass"/* Ore Bor 50mass"/• Ore Cby adding 3mass'/• burnt lime and using the pregranulation technique are comparable to a blend composedof I OOmass'/• fines (no concentrate). The sinter RDI is generally low and the sinter reducibi[ity is improved by adopting the pre-granu[ation technique.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.jstage.jst.go.jp/article/isijinternational1989/38/10/38_10_1069/_pdf/-char/en
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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