Czasopismo | HUTNIK - WIADOMOŚCI HUTNICZE | Rocznik 2014 - zeszyt 12

Properties of new formed fuels for iron ore sintering process

Maciej JODKOWSKI

nr katalogowy: 88603

The article presents the compressive strength test results of fuel composite intended for application in the processes of iron ore sintering production. In various mixtures there was examined the effect of the fragmentation degree and the mass fraction of the fragmented carbon fraction and moisture content of the fuel moulded shapes on its compressive strength. On the basis of the study analysis, it can be concluded that with decreasing average Sauter diameter of the micronized coal fraction, the strength of fuel moulded shapes increased, with the highest strength obtained for particle size distribution of d32 = 4.18 microns; Fig. 2c and the moisture content of about 3% by weight, Fig. 4. The in- crease of the carbon mass fraction of about d32 = 4.18 microns in the mixture resulted in an increase in the strength of the fuel moulded shapes.Introduction. In a number of pyrometallurgical processes, in addition to metalliferous material, basic component of the feed is coke, coke breeze or anthra- cite. Mainly they play the role as an energy carrier and reductant. For many years, research has been carried out in a wide range of applications of cheaper alter- natives to these materials in metallurgical aggregates. This applies to the process of sintering ore, blast furna- ce process, non-ferrous metal smelting process in shaft furnaces and processing technologies of various kinds of secondary metallurgical raw materials [1÷4]. As alternative fuel for metallurgical processes there are used coal-bearing fine-grained fractions from coal enrichment process, coke waste and biomass. Some of them have already found a wide range of highly suc- cessful application e.g. in the energy sector. [5]. It sho- uld be pointed out that a major problem of these pro- cesses is the emission of pollutants in the form of dust, CO2, SO2, CO, NOx and other products of incomplete combustion, which is particularly harmful to the envi- ronment. One way to improve t[...]

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