P. I. Matsak

Investigation of Taimyrsk graphites for producing periclase-carbon ladle refractories

ConclusionsThe investigations showed that Taimyrsk graphite corresponds in chemical composition to foundry and crucible graphite.The content of crystalline graphite equals 13.0–26.3%. The characteristics of periclase carbon goods based on foundry and Taimyrsk graphites correspond to the demands placed on ladle refractories. The wear factors of these products in the slag belt of the lining of 350-tonne steel ladles are on practically the same level.Taimyrsk graphites may be used for the production of periclase-carbon ladle refractories in place of crucible or foundry graphite.

Refractory compounds of basic composition for the monolithin lining of steel-teeming ladles

ConclusionsQuestions of the method of production of basic ramming compounds at Panteleimonovka Refractory Plant and their use in the monolithic lining of the walls of 160-ton steel-teeming ladles of the No. 2 Converter Shop of Kirvoi Rog Steel Combine are considered.An analysis of the wear of the lining during service showed that it occurs as the result of spalling of the sintered zone and salamandering of the lining. The use of a movable thermally insulated lid made it possible to hold the temperature of the ladle lining within limits of 730–1120°C between heats and to obtain a basic rammed lining life of 21–39 heats as opposed to an average life for the shop of 14.8 heats.A reserve for increasing the ladle basic lining life is optimization of the thermal conditions of its service, including high-temperature heating of the lining before pouring of the metal, the use of thermally insulated lids with the minimum consumption of time for placing of them, an increase in the life of the well refractory to the life of the walls and bottom, and elimination of cooling of the lining between heats.

Torch guniting of the lining of steel teeming ladles

Description de la torche permettant de realiser les revetements interieurs des poches de coulees continues

Kyanite compounds for guncreting the linings of steel ladles

ConclusionsA study was made of the properties of guncrete compounds based on kyanite suitable for service in steel ladles. The best properties were possessed by a compound containing 80% kyanite, 10% clay, and 10% binder.Industrial trials with the guncrete compounds were completed. The life of the new compounds is 20% longer than that of similar compounds based on Novoselitsk kaolin.

Experience gained in guniting of pouring ladles at the Magnitogorsk Metallurgical Combine

ConclusionsThe Magnitogorsk Metallurgical Combine has adopted guniting of the lining of 230-ton and 300-ton pouring ladles with chamotte-clay compounds, which are now being manufactured by its refractory sector.

Compounds based on novoselitsk kaolin for the gunite linings of steel ladles

ConclusionsA study was made of the properties of Gunite compounds based on Novoselitsk kaolin suitable for service in steel ladles. The best composition was: 90% chamotte, 10% kaolin, and 10% (on 100%) bond. A State Standard was developed for Gunite powder. Industrial trials were done on the new compounds. The results of the trials confirmed that it is feasible to use Novoselitsk kaolin for producing Gunite compounds.

Mechanized guniting of the lining of steelcasting ladles

ConclusionsA method has been developed and equipment constructed for guniting steelcasting ladles without any manual labor. Experiments and tests were carried out with compositions based on quartzite, Chasov-Yar semiloamy sand, and fine-ground chamotte. The industrial-scale guniting tests showed that the durability of the lining of 130-ton steelcasting ladles increases by 30% (4.7 melts) on average with one guniting per ladle campaign.