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EFFECT OF TYPICAL SLAGS ON FIRE BRICK WITH A METHOD OF DETERMINATION CORRELATED TO SERVICE 1
Author(s) -
Grigsby Chester E.
Publication year - 1929
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1929.tb18044.x
Subject(s) - slag (welding) , metallurgy , brick , ladle , abrasion (mechanical) , service life , lime , materials science , environmental science , waste management , engineering , composite material
In an investigation of the problem of producing refractories which would give maximum resistance to slags encountered in service, laboratory slag tests were made in a rotary slagging test furnace. A photograph and sketch of the furnace are given and the method of operation is described. A photograph of a typical test is shown and test data are given for typical high iron oxide, high lime, and high soda slags. These data include the numerical rating of ten test bricks in each case. Ten slag tests have been made with 50 different mixes, all in the field of fireclay and diaspore refractories. Bricks of the brands which give best results in the laboratory were tested in service in malleable iron air furnaces, gray iron cupolas, and “bull” ladles where sodium carbonate purifier is used. Operating conditions are given and chemical analyses of slags presented in several instances. Special firing treatment was given a few bricks prior to service tests. Excellent correlation between laboratory and service tests was obtained in cases where high‐temperature abrasion was not severe, demonstrating the reliability of the rotary furnace type of slagging test in predicting service results insofar as slag alone is concerned. Of equal importance with the reliability of the slag test is the need of a reliable high‐temperature abrasion test. The data indicate that in many installations high‐temperature abrasion is the major cause of failures that are charged entirely to slag erosion.