Commercial Production of Iron Ore Agglomerates Using Sinter Feeds Containing a Large Amount of Fine Ores.

Abstract

In order to improve present iron ore agglomeration processes drastically and meet the demands of future trends in iron ore resources suitably, a new agglomeration process named the Hybrid Pelletized Sinter process was studied. On the basis of a prior experimental study and the semi-commercial plant trial, a No. 4 GasFlow Characteristics in Agglomeration ProcessIn an agglomerating plant using the grate system, the control of gas flow passing through the bed is extremely important because it directly affects the productivity and the yield. Recent studies on the sintering process indicate that in the raw material charging unit, avalanches caused by stickiness and repose angle of the quasi-particles occur periodically along the moving direction of the grate. The productive yield of the sinter is reduced by these avalanches.15) This is attributed to the fact that as permeability in the sintering bed changes locally, due to these avalanches, gas flow fluctuates along the bed depth.In order to prevent the avalanches, various charging devices are being studied.15,16) Bycontrast, the HPS process has the following superior characteristics, in comparison with sintering process: (1) The green pellets are more spherical comparedto the quasi-particles.( 2) Since the surface of the green pellets is covered C 1993 ISIJ ISIJ International, Vol. 33 (1993)

Marra Mamba Ore, Its Mineralogical Properties and Evaluation for Utilization

“…4 sintering plant could use Marra Mamba ores (BHP OB29 24) ) up to 10 mass% with this technique. Furthermore, HPS (Hybrid palletized sinter) processes 25) developed at Fukuyama No. 5 sintering plant in 1988 enabled to use Marra Mamba ores up to 15 mass%.…”

Interpretation on Iron Ore Granulation Process Based on Particle-size Analysis

“…Xiaobo HUANG, 1) Xuewei LV 2) * and Zhengliang XUE 3) 1 (Received on March 15, 2016; accepted on June 29, 2016; J-STAGE Advance published date: September 28, 2016) The adopted conventional granulation and proposed pre-wetting granulation for six sinter mixtures were reinvestigated and interpreted from the perspective of particle size analysis. To research the experimental data from the two processes, two mass fractal models were adopted and further discussed in the characterization of particle size distribution for these sinter mixtures.…”

“…It influences not only the green bed permeability before ignition, but also the high temperature reactions, such as fuel combustion, 1,2) primary sinter melt formation 3,4) during sintering. The most important issues being researched in iron ore granulation are the two: the method or technology to rearrange the distributions of chemical compositions or mineral phases in the granules, 5) and the other one to optimize the size distribution 6,7) of the granules for any assigned sinter mixture.…”

Development of Pellet-Sinter Composite Agglomerate for Blast Furnace

“…HPS may disintegrate and generates high proportion of individual pellets during treatment and transportation due to insufficient contact area between fired pellets. 6) However, this process is in operation with improved blast furnace productivity in Japan as shown by Niwa et al 7) The investigators 6) have made the pellet with ultra-fines iron oxide and subsequently used in sinter bed to get a composite mass of pellet and sinter mix where, acid pellets were embedded in to the sinter mass. The process was named as composite agglomeration process (CAP).…”