Free Opening Performance of Steel Ladle as a Function of Filler Sand Properties

被引：14

作者：

da Cruz, Ricardo Thome ^{[1
]}

Pelisser, Gustavo Frassini ^{[2
]}

Bielefeldt, Wagner Viana ^{[2
]}

Braganca, Saulo Roca ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Lab Mat Ceram LACER, Av Osvaldo Aranha 99-705, BR-90013519 Porto Alegre, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Lab Siderurgia LASID, Av Bento Goncalves 9500,Sect 6, BR-91501970 Porto Alegre, RS, Brazil

来源：

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2016年 / 19卷 / 02期

关键词：

Filler sand; Free opening rate; Refractory; Steelmaking; SLIDING-GATE SYSTEMS; PACKING SANDS;

D O I：

10.1590/1980-5373-MR-2015-0359

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The secondary steel refining process uses filler sand as a thermal insulating barrier that separates the liquid metal from direct contact with slide-gate system of the steel ladle. The effective use of this practice must provide a high free opening rate, impacting on increased productivity and quality of steel, reducing the number of stops, thermal loss and even the steel re-oxidation. Both operational parameters and material properties have influence on the free opening rate. In the present work, two chromite-silica sands were analyzed, and some composition changes were proposed. The properties of these materials and the relevant process parameters were evaluated according to the free opening rate under normal operational conditions. The increases in carbon content and in particle size were considered the main factors relating to the filler sand. The percentage of free opening is also strongly influenced by time and temperature of the steel contact.

引用

页码：408 / 412

页数：5

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