An experimental technique for investigating the skulling behavior in the blast furnace hearth

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Lei Shao, Pekka Taskinen, Ari Jokilaakso, Henrik Saxen, Yingxia Qu, Zongshu Zou
Förläggare: Wiley
Publiceringsår: 2019
Tidskrift: Steel Research International
Volym: 90


Abstrakt

The skulling behavior in the blast furnace (BF) hearth has yet to be
investigated as few (if any) industrial/experimental studies with
particular focus on hot metal are reported in the open literature. As a
necessary first step toward a better understanding of the sophisticated
behavior, an experimental technique is introduced in the present paper.
The experimental apparatus, which mainly consists of a vertical tube
furnace, a rotating and moveable pedestal, and a moveable water-cooled
probe covered with a multi-layer structured refractory sleeve can
utilize industrial coke, pig iron, and BF hearth carbon brick as raw
materials. The technique is shown to be capable of producing chemical,
thermal, and mechanical conditions similar to those in the real process.
The feasibility and potential of the technique are demonstrated by a
set of experimental runs. The results indicate that the air gap between
the cooling device and the refractory lining plays a decisive role in
both skull formation and lining erosion. Furthermore, the microstructure
of graphite precipitated during solidification is influenced by the
cooling rate, which in practice is affected by the BF hearth operating
parameters. It is hoped that the current contribution will stimulate the
growing research interest in this subject.


Senast uppdaterad 2020-17-02 vid 01:25