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COMPARISON OF USED SILICA BRICK FROM INSULATED AND UNINSULATED BASIC OPEN‐HEARTH ROOFS*

1935; Wiley; Volume: 18; Issue: 1-12 Linguagem: Inglês

10.1111/j.1151-2916.1935.tb19359.x

1551-2916

Fred A. Harvey,

Glass properties and applications

ABSTRACT Samples of silica brick from the roofs of two basic open‐hearth furnaces, one of which had been insulated and the other uninsulated, after a full campaign were compared chemically and petrographically. The uninsulated brick was divided into nine distinct color zones, while the insulated brick showed but three. The three zones of the insulated brick were nearly identical zone for zone with the three inner zones of the uninsulated brick. The zone of weakness which normally occurs in open‐hearth roof brick from uninsulated furnaces did not occur in the brick from the insulated roof. Chemical and petrographic analyses are given.