2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 5: Vanyukov Intl. Symp. / Non-ferrous & KIVCET

Editors:	Kongoli F, Kozlov P, Tsymbulov L, Fedorov A, Shumskiy V
Publisher:	Flogen Star OUTREACH
Publication Year:	2015
Pages:	310 pages
ISBN:	978-1-987820-28-7
ISSN:	2291-1227 (Metals and Materials Processing in a Clean Environment Series)

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Formation of Accretions in Waelz Kilns as the Result of Various Oxidised Feed Material Recycling

Pavel Kozlov¹; A. Zatonsky²; A. Panshin³; V. Dyubanov³;
¹JSC CZP, Chelyabinsk, Russian Federation; ²JSC “CHELYABINSK ZINC PLANT”, Chelyabinsk, Russian Federation; ³LLC “UMMC-HOLDING", Verkhnyaya Pyshma, Russian Federation;
Type of Paper: Plenary
Id Paper: 36
Topic: 6

Abstract:

Formation of accretions is one of the main disadvantages of the processes which are carried out in Waelz kilns (productivity falls, chemistry of the process is violated). <br />Analysis of the accretions formation process reveals that the main causes of their growth are:<br />- Chemical composition of charge mixture (as it contains slag-forming compounds - CaO, SiO2, FeO);<br />- The kiln rotation speed;<br />- Feed material quantity;<br />- Temperature conditions;<br />- Grain size composition of charge mixture. <br />Setting operating conditions of the Waelz kiln in accordance with charge material composition makes it possible to avoid accretion formation. <br />At the same time, it is necessary to form skull in the kiln as a means of the furnace refractory protection from chemical and thermal "corrosion".<br />It is suggested to operate the Waelz kiln in the regime of variable silica ration in the interval from 0.4A·0.6 to 1.4A·1.6 that gives an opportunity for charge mixture consisting mainly of zinc cakes to exclude furnace shutdown for accretions removal and to increase in-service life of refractory protection at the expense of skull.

Keywords:

Waelz process, accretions, skull, silica ratio


References:

[1] 1P.A. Kozlov // Waelz process. - Publishing house: Moscow: Ore and metals, 2002.
[2] A.V. Kolesnikov, DA Ivakin, PA Kozlov: Wall accretions in Waelz kilns in the processing of zinc cakes, Non-ferrous metallurgy, 1 (2010), 25-32.
[3] A.Pusko, V.Yarygin, A. Kolesnikov, E.Zheludkova: Reasons of Wall accretions in Waelz kilns, Non-ferrous metallurgy, 2 (1976), 32-37.
[4] A.M.Panshin.,V.I.Matyuhin., P.A.Kozlov., O.V.Matyuhin: Thermal and physical characteristics of the processes Waelz slag components in a Waelz kiln, Part 1, Nonferrous metals, 11 (2014), 22-26.

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Cite this article as:

Kozlov P, Zatonsky A, Panshin A, Dyubanov V. Formation of Accretions in Waelz Kilns as the Result of Various Oxidised Feed Material Recycling. In: Kongoli F, Kozlov P, Tsymbulov L, Fedorov A, Shumskiy V, editors. Sustainable Industrial Processing Summit SIPS 2015 Volume 5: Vanyukov Intl. Symp. / Non-ferrous & KIVCET. Volume 5. Montreal(Canada): FLOGEN Star Outreach. 2015. p. 181-188.