Olli Vitikka , Mikko Iljana , Anne Heikkilä , Pauli Pekuri , Simo Isokääntä , Timo Fabritius
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引用次数: 0
Abstract
The worldwide use of blast furnaces (BF) in ironmaking continues. The generation of fine matter in the BF shaft hampers the furnace operation and causes particle emissions. The tendency of the main charge of the BFs, iron ore pellets, to produce fines during the process is evaluated by means of standardized tests performed at a low constant temperature. In this work, the durability of commercial acid pellets was evaluated by performing cold compressive strength tests on samples that had been exposed to high-temperature experiments aiming for different reduction degrees in a laboratory-scale furnace simulating actual BF conditions. Strength was found to have decreased to a minimum of approximately 59 % of the original result when the reduction degree was 19 %. The studied pellet achieved a comparatively good result in the standardized low-temperature reduction-disintegration test, which shows the uncertainty of current methods in the evaluation of ferrous burden materials.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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