The replacement of aged batteries needs investment and will be submitted to growing environmental pressures. Hence, an important effort is carried out to make the battery last longer. In this paper, coke oven life prolongation technology is reviewed taken into account several points of view: blend design; battery heating; operational control; refractory maintenance. Also, a technique for the diagnostics of the degree of damage is presented, as a tool for follow-up, damage assessment and application of corrective actions (figure 1).
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Metallurgical Research & Technology
The Iron and Steel Industry has undergone a radical change, and processes have been developed continually for the faster rate of production. The thermal characteristic of reaction depends on the thermal conductivity of coal charge by progressively developing the zone of coke. In general, higher the oven temperature, the more rapid is the initial rate of heating, plastic temperature range, plasticity and volatile evolution characteristics of the coal. The higher thermal conductivity of bricks will increase heat transfer rate and consequently, the output of the oven will increase the throughput. The heating rate is also associated with the pattern of heat supply during carbonization which influences the strength and fissuring of the coke. Results show that replacement of LC-65 castable with higher thermal conductivity castable SiC-30% reduces the coking time by 50% whereas LC-85 reduces the coking time by 20% even at same coke end temperature and coke CSR. The requirement of free spac.
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This paper describes results of the mathematical modelling of steady-state and transient physical phe-nomena taking place in the heating channels of a coke oven battery. A formulated system of standard Computational Fluid Dynamics (CFD) equations coupled with User Defined Functions is solved numeri-cally using commercial software Ansys Fluent. Finally, the developed 3-D model is used to examine the influence of selected operating parameters on the resulting temperature, velocity and concentration fields within considered object. The obtained results are briefly discussed considering their physical correctness related to industrial measurements.
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