Dabbiru Satish Kumar, Ravishekhar Rao, Tathicherla Rajendra, Reddy Prasad, Abhijit Sarkar, Ajit Kumar Karande, and Madhu Ranjan:
Slab caster productivity enhancement at JSW steel
Tube changing, slag detection, break-out prevention, mathematical models, output improvement, slab quality
The performance of a steel making shop is governed by the productivity of its casters. The productivity of a continuous caster depends on its utilization which, in turn, is determined by its sequence length and yield. Productivity enhancement of its existing two casters, instead of adding another caster was taken up at JSW steel, following the company´s increase in iron making capacity from 1.6 million t to 2.5 million t. This extension was achieved by adoption of new technologies for increased sequences, optimization of casting parameters by using empirical models to reduce disturbances, and several in-house developments aiming at increased yield. These strategies have increased the casting sequence, caster yield, and productivity of each strand. The continuous casting shop has increased its productivity per caster from 0.94 million t/a to 1.13 million t/a to match the increased steel production of its BOF shop. These measures have also resulted in energy savings and reduction in operating cost. The details of the adopted strategies and their impact on productivity enhancement are presented in this paper.
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