会议专题

Strategies for efficient utilisation of CRL magnetite pellet feed in sintering and pelletising

  CSIRO tested a Crosslands Resources ( ”CRL”) concentrate sample to investigate its utilisation strategies in both sintering and pelletising.The concentrate was predominantly magnetite,very high in Fe and moderately low in Si02 with extremely low levels of deleterious impurities,such as S,Ti,Cu and A1203.It therefore met the chemistry targets of magnetite concentrates for making both blast furnace and DR ( direct reduction) pellets and was considerably better in chemistry than the typical sinter feeds commercially available on the market.However,at about 80% passing 75 microns and with a relatively low specific surface area of - 761 cmz/g,it was coarser than most pellet feeds and much finer and denser than normal sinter feeds.Accordingly,special strategies are required in order to utilise it at high proportions in pelletising and sintering.This paper discusses various raw material preparation technologies and blending optimization methods demonstrated to be effective for improving the sintering and pelletising performance of CRL magnetite concentrate.Pre-granulation and addition of hydrated lime were found to be particularly efficient in recovering the sintering productivity of sinter blends containing up t0 150-/o - 200-/o CRL pellet feed.In pelletising,HPGR ( High Pressure Grinding Rolls) grinding enabled production of good quality pellets from 1000-/o CRL concentrate and optimized blends containing up t0700-/o CRL concentrate also formed good pellets.

magnetite concentrate sintering pelletising pre-granulation pre-balling HPGR grinding blending

LU Liming ADAM Matt EDENTON Alex SUTHERS Steve KILBURN Matt SMYTH Rodney SUANN Brett HUTCHENS Mick

CSIRO Process Science and Engineering,Kenmore,QLD 4069,Australia Crosslands Resources,Level 20,Exchange Plaza,2 The Esplanade,Perth,WA 6000,Australia

国内会议

第五届宝钢学术年会

上海

英文

1-9

2013-06-01(万方平台首次上网日期,不代表论文的发表时间)