Abstract
The purpose of coke quenching is to quench the incandescent coke in the hot car using intense water sprays covering entire cross-section of the red hot coke bed and preventing it from burning, at the same time to obtain coke of uniform and minimum deviations in coke moisture. This case study presents a simple approach of developing a Standard Operating Procedure (SOP) to reduce the variation in moisture in Coke by analyzing past data and using Cause and Effect diagram and critically analyzing the contribution of different factors in introducing variation in moisture. The pre and post SOP implementation results are analyzed statistically to ensure that the difference in variance of moisture content is statistically significant. After implementing the action plan for one quarter, overwhelming results were noticed. The standard deviation of moisture on day to day basis has reduced from 2.5% to 1.0%. Keywords: Quenching, Metallurgical coke, Blast furnace, non-recovery oven, Drain time.
Highlights
In the integrated steel plants, coke handling system in through several ports located above the charge level in coke plant is designed to provide a ‘Just in time’ supply of both pusher and coke side doors of the oven
Walker & Barkdoll, 2003), this ‘Just in time’ delivery Combusted gases collect in a common tunnel and exit via posed numerous operating challenges pertaining to a stack, which creates a natural draft in the oven
The quantity supplied is into a waste heat recovery boiler, which converts excess accounted in terms of Dry Metric Tons (DMT) basis
Summary
In the integrated steel plants, coke handling system in through several ports located above the charge level in coke plant is designed to provide a ‘Just in time’ supply of both pusher and coke side doors of the oven. The BF grade coke is directly the by-products are not recovered, the process is called supplied to the Pig Iron Plant administered by separate Non-Recovery coke making. The heat into steam for power generation, the process is variation of moisture varies the coke charge rate in blast called Heat Recovery Coke making. As the Non-Recovery ovens operate under negative higher moisture in coke reduces the quantity supplied pressure and at a temperature at which all potential affecting Production quantity at coke plant. On other hand recovery ovens variation in moisture level in the BF coke. Non-recovery Coke Plants are originally referred to these reasons integrated steel industries in India focused as Beehive Ovens, again the coal is carbonized in large their attention towards less complex and eco friendly oven chambers.
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