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West Jerusalem, Israel

Muchnik D.A.,Fuel Technologies
Coke and Chemistry | Year: 2010

The relation between the CSR and CRI values of coke and its familiar characteristics is analyzed. The strength and reactivity of coke differ over the blast-furnace height. The economic importance of each of these properties may only be established for specified blast-furnace conditions and technology. The systems for coke stabilization must be selected on the basis of the specific properties of the coke. There can never be a general solution. The optimal stability must be determined for each coke-furnace combination. Literature sources that address the following issues are identified: the equipment for improving coke properties; the necessary processes and their regulation; and the method for determining optimal blast-furnace conditions on the basis of the characteristics of the specific coke-furnace system. © 2010 Allerton Press, Inc.


Muchnik D.A.,Fuel Technologies | Zagainov V.S.,OAO VUKhIN
Coke and Chemistry | Year: 2013

The stabilization of coke is highly effective, no matter how the influence of its properties on the production costs of hot metal is assessed. Setting limits on the maximum effectiveness has little influence on the result. Thus, the number of stabilizing actions adopted (the number of stabilization-drum rotations) may be sharply reduced. In that case, the speed of the stabilizing drum may be low. The stabilization of coke offers untapped potential for reducing the cost of hot metal. © 2012 Allerton Press, Inc.


Muchnik D.A.,Fuel Technologies
Coke and Chemistry | Year: 2012

Dynamic calculations of coke disintegration are considered. The change in mean piece size (geometric and harmonic means) corresponds to the coke quality. The relative ease of crushing (or erosion) shows how one coke compares to another. These characteristics provide improved ability to distinguish between batches of coke and are readily interpreted. © 2012 Allerton Press, Inc.


Muchnik D.A.,Fuel Technologies | Zagainov V.S.,OAO VUKhIN
Coke and Chemistry | Year: 2012

The effectiveness of stabilization ($/t of hot metal) is assessed for ten coke samples. A method of comparing coke quality is proposed, on the basis of its influence on the coke consumption in hot-metal production. Three formulas for the dependence of the coke consumption on its quality are considered. The relation between the effectiveness of coke stabilization and its initial properties is found to be stochastic. Analysis shows that the effectiveness of stabilization is slightly reduced when the cost of stabilization is taken into account at levels of $0. 05 and $0. 1 per revolution of the stabilizing drum. © 2012 Allerton Press, Inc.


Muchnik D.A.,Fuel Technologies
Coke and Chemistry | Year: 2010

Rational organization of coke stabilization is considered, for various examples. On the basis of the existing relations between the coke and blast-furnace shops, a method is proposed for determining the number of turns in the Micum drum required to obtain the maximum and most economical stabilization. © 2010 Allerton Press, Inc.

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