Behavior of the Fireclay Lining of a Coke Gas Cupola Furnace When Melting Cast Iron with Anode Scrappage in Electrolysis Production. Part 21
Isagulov A.Z. Kashcheev I.D. Sidorina E.A. Zemlyanoy K.G.
March 2022Springer
Refractories and Industrial Ceramics
2022#62Issue 6614 - 617 pp.
In this study, chamotte refractory samples were analyzed after they were used in the shaft and crucible of a coke gas cupola furnace during the melting of cast iron with spheroidal graphite using carbon waste obtained from aluminum electrolysis as a reducing agent. It was discovered that the structure of the fireclay refractory changed during operation because of corrosion factors specific for each zone of the cupola furnace. Refractory silicates (glass phase and quartz) primarily interact with corrosives. Secondary mullitization, which is associated with the mineralizing effect of fluorine-containing vapors in the furnace atmosphere, was extremely active during refractory operation. In the crucible, the refractory was influenced by mechanical loads exceeding the ultimate compressive strength of the refractory, as well as chemical loads from the metal melts and low-basic slag. Thus, the refractory in the crucible lining was first destroyed mechanically and then chemically, dissolving from the contact surface in the low-basic slag. The glass phase of the products was impregnated with iron oxides, which were reduced in the refractory structure under the influence of the furnace atmosphere.
aluminosilicate products , coke oven gas cupola , corrosion resistance , lining , mullite formation
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Karaganda Technical University, Karaganda, Kazakhstan
Ural Federal University, Yekaterinburg, Russian Federation
Karaganda Technical University
Ural Federal University
10 лет помогаем публиковать статьи Международный издатель
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