Page 25 - Steel Tech India eMagazine Volume April 2022

VOL. 16 • NO. 3 • April 2022

Fig. 2: Process flow diagram of a sinter plant

good absorption capability etc. lD slag are used as a is chosen. It is observed that in VSP several types
road base material, land filling material, railway ballast of process waste& dusts are laying in the allocated
[17]
material , clinker and gypsum in cement making , dumping area nearer to the designated process plant.
[18]
flux material in sinter making , etc. Research works these fine particles are having high mineral values.
[17]
are performed across the globe to find a possible route In modern days these wastes are utilized to some
to properly utilize LD slag.Shiomiet. al. described extent in the palletization plant or in sinter plant but the
[19]
a possible method of phosphorous removal through major portion are discarded as waste material. these
evaporation method by adding silicon to the system wastes have an adverse effect to the environment and
forming a Fe-P-c alloy as a result of carbo-thermic especially to the human health. Utilization of these
reduction of slag. In Vishakhapatnam steel plant wastes from sinter plant and steel melting shop through
less than 4 weight percent lD slag is used in sinter a proper route is socio-economically advantageous.
preparation in aeirich mixing equipment and eirich So, by this process a secondary raw material can be
mixing techniques. introduced as well as solid wastes can be minimized to
some extent.
Sludge is another type of waste generates from steel
melting shop containing iron. Ambasta et.al. proposed Collectionand Pretreatment of the Raw Materials
to utilize the sludge from steel melting shop in sinter the fine particles are collected from the sinter plant
preparation . Further research may enhance the from two different locations, one is from air cleaning
[20]
usage of this type of waste materials. chamber and another is from the gas cleaning
chamber. the sample is named as Sinter AcP dust
Research Outline
and Sinter GcP dust. From steel melting shop sludge
the research work dealt with the process waste of the is also collected from sludge pond and named as SMS
sinter plant and the steel melting shop of an integrated Sludge. coke dust (fine particle of coke from coke oven
steel plant. For the purpose of waste collection byproduct plant) is collected as a reductant. All the
RastriyaIspat Nigam Limited (RINL), Visakhapatnam, samples are dried at 80 deg c for 6 hours except coke
India commonly known as Vizag Steel Plant (VSP) dust and crushed (including coke dust) separately in a

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