| Improvement in Blast Furnace Trough Mixes 1n India |
N. K. GHOSH, S. K. GARAI, A. K. BHATTACHARYA, s. BARUA
AND A. K. DASGUPTA
Pages : 156-161
DOI : 10.1080/0371750X.1986.10822815 |
| Abstract |
| The advent of oxygen steelmaking process has placed an increasing
demand of the supply of hot metal which has resulted in generation of
higher capacity blast furnaces with internal volume of 3000 to 5000 m 3 •
This has a marked influence on the quality of refractories to be used
for the lining troughs in cast house. Thus the traditional mixes made
from sand-clay-coke-pitch and bonded by water/tar can no longer be
used economically. The durability of traditional mass is anywhere
between 5,000 and 10,000 tonnes of hot metal throughput. The
present paper describes the different trough mixes, installation techniques
and lining performance which are currently in vogue in developed
countries.
The status of blast furnace trough lining materials in the steel
plants of India in the context of material composition, granulometry,
bond characteristics and mode of application vis-a-vis their performance
has been outlined. Studies revealed that there is ample scope
of improving the performances of blast furnace troughs under local
conditions. The effort of RDCIS in association with the steel plants
of SAIL for the development of improved trough lining mix is highlighted.
Plant scale trials reveal that it is possible to achieve a throughput
of 25,000-30,000 tonnes of hot metal on the trough lining based
on indigenous aluminous raw materials and carbonaceous binders
with the· adoption of proper granulometry, mix composition and
method of installation. |
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