Recycling Of Tar Decanter Sludge Through
The Addition Of Coke Oven Batteries In
Charge Coal Feed
Author(s)
Y. Singh, S. T. Selvan, S. K. Ghosh & A. K. P. Singh
Abstract
Toxic Tar Decanter Sludge previously dumped at the Bokaro Steel Plant, Steel
Authority of India Limited (SAIL), is now recycled to the coke ovens via the
coal charge. Not only has an environmental pollutant been removed but savings
of US $ 0.15 million a year have resulted due to carbon recovery. Based on
encouraging results at Bokaro, other SAIL plants have undertaken the
implementation of the system. This paper depicts details of the generation of tar
decanter sludge, the modified recycling system, the design features, the novelty
in the system, the modifications, and the economic benefits.
Keywords: tar decanter sludge disposal, recycling, waste utilisation,
environmental protection, economic utilisation of waste.
1 Introduction
Tar Decanter Sludge (TDS) is generated as a by-product of coke oven gas.
Disposal of TDS is difficult because it is a sticky material and it easily melts
during the Indian summer. When melted, it spreads and further pollutes the
disposal area. The generation of TDS at Bokaro Steel Plant is approximately
200t/month. The TDS is collected from the decanter in a specially designed pot.
The former practice was to lift the pot using a dumper placer, carry it outside the
plant premises and empty it by inverting the pot.
The R&D Centre for Iron & Steel (RDCIS), Steel Authority of India Ltd.
(SAIL) has designed, installed and commissioned a system, which has led to
utilization of the TDS by feeding it to the coal charge on the conveyor belt from
where it is distributed to the various coke oven batteries. The use of TDS in the
Keywords
tar decanter sludge disposal, recycling, waste utilisation,
environmental protection, economic utilisation of waste.
Related Book
Other papers in this volume
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