Title

TECHNICAL SOLUTIONS TO IMPROVE THE SERVICE LIFE OF THE DOLOMITE LADLE LININGS

TECHNICAL SOLUTIONS TO IMPROVE THE SERVICE LIFE OF THE DOLOMITE LADLE LININGS

Authorship

Schüssler, Ferdinand; Cristini, Mario

Schüssler, Ferdinand

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Cristini, Mario

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DOI

10.5151/2594-5300-0028

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Abstract

It is common knowledge that the refractory lining, set with dolomite bricks, represents nowadays one of the most widespread lining for the steelplant ladles. The reason of this success is mainly due to: its chemical and physical properties that make it highly compatible with the metallurgical practice that uses basic slags; cheapness of use. Often, the dolomite brick characteristics themselves are not enough to highlight all their potential in terms of performance, so, the cooperation and the exchanges of ideas, as well as the experience between user and the refractory supplier becomes very important. Obviously the ladle refractory lining principally depends on the slag as well as on the kind of metallurgical treatment it is subjected, therefore it would make more sense to understand the refractory life as a steel and slag contact time, but practically it is still easier to evaluate the refractory ladle life in terms of number of heats done. Most of the ladle dolomite refractory users know the operating parameters to be adopted in order to get the best yield of their refractory linings, but sometimes, despite the quality and the size of the refractory bricks, it is not easy to reach the aimed campaigns. The present works would like to focus on some practical aspects aiming to improve the dolomite refractory ladle lining life: slag maintenance, ladle operation and newly developed pitch binder system.

It is common knowledge that the refractory lining, set with dolomite bricks, represents nowadays one of the most widespread lining for the steelplant ladles. The reason of this success is mainly due to: its chemical and physical properties that make it highly compatible with the metallurgical practice that uses basic slags; cheapness of use. Often, the dolomite brick characteristics themselves are not enough to highlight all their potential in terms of performance, so, the cooperation and the exchanges of ideas, as well as the experience between user and the refractory supplier becomes very important. Obviously the ladle refractory lining principally depends on the slag as well as on the kind of metallurgical treatment it is subjected, therefore it would make more sense to understand the refractory life as a steel and slag contact time, but practically it is still easier to evaluate the refractory ladle life in terms of number of heats done. Most of the ladle dolomite refractory users know the operating parameters to be adopted in order to get the best yield of their refractory linings, but sometimes, despite the quality and the size of the refractory bricks, it is not easy to reach the aimed campaigns. The present works would like to focus on some practical aspects aiming to improve the dolomite refractory ladle lining life: slag maintenance, ladle operation and newly developed pitch binder system.

Keywords

CaO saturated slag; Fast ladle cycle; Low emission binder.

CaO saturated slag; Fast ladle cycle; Low emission binder.