Ceramic materials for the liquid ash separator in pressurised coal dust firing

被引：0

作者：

Kaiser, A ^{[1
]}

Seok, JW ^{[1
]}

Sax, A ^{[1
]}

Telle, R ^{[1
]}

机构：

[1] Aachen Univ Technol, Inst Mineral Engn, Aachen, Germany

来源：

APPLIED MINERALOGY, VOLS 1 AND 2: RESEARCH, ECONOMY, TECHNOLOGY, ECOLOGY AND CULTURE | 2000年

关键词：

D O I：

暂无

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

Pressurized coal fired gas turbines are protected from liquid fly ashes and alkalies by slag separating devices. In order to increase process temperatures and pressures to achieve higher figure of merits in energy turn-over improved refractory materials resisting corrosion at temperatures above 1700 degrees C must be developed. The corrosion characteristics of various commercial and laboratory grade refractory materials based on the system MgO-Al2O3-Cr2O3 in contact with two coal ash slags have been investigated. Supplementary thermodynamic calculations on the slag-refractory interaction under conditions of pressurized coal combustion have been carried out in order to clear up corrosion mechanisms like the dissolution and reprecipitation of sesquioxides and spinels and to make suggestions for a suitable materials selection.

引用

页码：163 / 166

页数：4