Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Stability of Alumina-base Refractories in Western Lignite-ash Slag Environments.

Authors
Pahlman-JE; Anderson-CF; Khalafalla-SE
Source
NTIS: PB 293 238 :16 pages
Link
NIOSHTIC No.
10007898
Abstract
One of the goals of the Bureau of Mines is to develop metallurgical processes that conserve energy and/or that take advantage of abundant domestic energy sources. Western lignites and subbituminous coals can be used for firing pellet induration and metallization furnaces. However, the refractory linings of these furnaces must be able to withstand attack from corrosive alkali metal oxides present in the ash of many of the low-rank fossil fuels. The Bureau of Mines conducted dynamic and static slag tests on high-alumina and alumina-silica refractories to determine their resistance to lignite ash slags. The investigations showed that increased alkali content in the lignite ash caused increased corrosion and erosion of the tested refractories. The degree of corrosion decreased with increasing alumina content, with the 99- percent-alumina refractories having the highest resistance. In general, the matrix phase was attacked preferentially to the alumina grains. Also, porosity reduction and tar impregnation enhanced the corrosion and erosion resistance. The 90- to 99-percent-alumina refractories are recommended for use as furnace linings in alkali slag environments.
Publication Date
19790101
Document Type
IH; Report of Investigation;
Fiscal Year
1979
NTIS Accession No.
PB-293238
NTIS Price
A03
Identifying No.
RI 8334
NIOSH Division
TCRC;
Source Name
NTIS: PB 293 238
TOP