Metallurgy, Vol. 42 No. 2, 2003.
Professional paper
Investigations of Gas Permeability of the Charge in the Reduction Process of Iron Ores by Hard Coal
C. Kolmasiak
R. Budzik
Abstract
An increased interest in new methods of pig iron production, which do not require the use of coke, leads to searches for substitutes of coke as the reducing agent. Hard coal is gaining an increasing importance in these searches, as its resources in the world’s deposits presently known should be sufficient for the next 300 to 500 years, whereas the resources of petroleum or natural gas are estimated to suffice only for a few dozens of years. This is particularly true for Poland, where the difference in the respective resources indicates even more clearly the need of using hard coal as a reducing agent. The purpose of the study was to investigate the change of the gas permeability of different types of coal as a result of phenomena occurring in the processes of reduction of iron ores, in order to evaluate the suitability of various Polish coals for these processes. The article describes the methodology of examination of the gas permeability of a hard coal bed in a stream of hot reduction gases. Tests were performed in a model testing furnace. As the test material, hard coal types 32, 33 and 34 from selected Polish coal mines were used.
Keywords
Hrčak ID:
128464
URI
Publication date:
1.4.2003.
Visits: 718 *