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Zaporozhe, Ukraine

Zelenskiy V.V.,PAO Zaporozhkoks | Nesterenko S.V.,University of Kharkiv | Bannikov L.P.,Ukrainian Coal Chemistry Institute
Coke and Chemistry | Year: 2014

The corrosion resistance of austenitic steel and nickel alloys is studied in the most aggressive media within the chemical shops of coke plants: in the stock solutions of the sulfate department and in sulfuric-acid solutions used for the purification of crude benzene. In the study, the most dangerous ions, activating corrosion in 10X17H13M2T steel, are CNS- ions, which are capable of destroying the passive layers on chromium-nickel-molybdenum steel in the stock solutions of the sulfate department. Research shows that sulfuric-acid solutions used for the purification of crude benzene are very aggressive in relation to high-alloy steel, titanium, zirconium, and copper. Possible structural materials for use in contact with such solutions include the nickel alloys XH63MB, XH65MBHy and Hastelloy C-276. © 2014 Allerton Press, Inc.

Rubchevskiy V.N.,PAO Zaporozhkoks | Gaidaenko A.S.,PAO Zaporozhkoks | Chernyshov Y.A.,PAO Zaporozhkoks | Podlubnyy A.V.,PAO Zaporozhkoks | And 5 more authors.
Coke and Chemistry | Year: 2014

Experiment design is classically used in mathematical modeling of technological processes. To that end, experiments are conducted according to a matrix with strict ranking of the data. That approach is poorly suited to objects in which the input parameters vary arbitrarily, such as operational industrial enterprises. Accordingly, a new method has been developed for the analysis of data from a passive experiment; the method is incorporated in a computer program. © 2014 Allerton Press, Inc.

Zelenskiy V.V.,PAO Zaporozhkoks | Fillipov V.L.,PAO Zaporozhkoks | Bannikov L.P.,Ukrainian Coal Chemistry Institute | Karchakova V.V.,Ukrainian Coal Chemistry Institute
Coke and Chemistry | Year: 2014

Intensification of the separation of water-tar emulsions is analyzed in theoretical and practical terms. The formation of the coal-tar emulsion in tar deposition and its preparation for storage and use is considered. The best method of breaking down the emulsion is to intensify gravitational settling by means of a new deemulsifier, with reduced reagent consumption. Industrial trials at PAO Zaporozhkoks show that the chosen deemulsifier is able to reduce the moisture content of the tar that is most resistant to separation from 8-15% to 2-4%, without the need for complex equipment. © 2014 Allerton Press, Inc.

Rubchevskiy V.N.,PAO Zaporozhkoks | Ovchinnikova S.A.,PAO Zaporozhkoks | Volokh V.M.,PAO Zaporozhkoks | Begma R.A.,PAO Zaporozhkoks | And 2 more authors.
Coke and Chemistry | Year: 2014

Changes in the raw materials employed and the coking conditions affect the quality of the tar byproducts used in the production of electrode pitch. The decline in tar quality associated with faster pyrolysis of the vapor-gas products within the coking chamber is discussed. The factors affecting the properties of the newly formed coal tar are analyzed, and the results are compared with theoretical concepts regarding the transformation of the primary products of pyrolysis in the coking chamber. Practical recommendations are developed regarding the production of higher-quality tar. Systematic monitoring of the volume and temperature of the free space within the chamber permits improvement in tar quality, despite increasing coking rates in the production of higher-quality coke. With a tar density of 1185-1190 kg/m3, the moisture content falls to 2.0-5.5%, and the ash content to 0.08-0.11%. © 2014 Allerton Press, Inc.

Kuznichenko V.M.,Ukrainian Coal Chemistry Institute | Sytnik A.V.,Ukrainian Coal Chemistry Institute | Gaidaenko A.S.,PAO Zaporozhkoks | Ovchinnikova S.A.,PAO Zaporozhkoks | Chernyshov Y.A.,PAO Zaporozhkoks
Coke and Chemistry | Year: 2014

The state of the coke ovens at PAO Zaporozhkoks is analyzed. The coking pressure of coal concentrates is classified, and their interaction in binary mixtures is discussed. Prediction and simulation of the coking pressure in coal batch permits extension of battery life. © 2014 Allerton Press, Inc.

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