2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining
| Editors: | Kongoli F, Kumar V, Aifantis K, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 220 pages |
| ISBN: | 978-1-987820-54-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Recycling of Iron and steel waste in Tunnel Kiln Direct Reduction of Iron Process
Najibeh Toloue Farrokh1;1OULU, Oulu, Finland;
Type of Paper: Regular
Id Paper: 461
Topic: 7
Abstract:
Adjusting mixture composition to fit a given Andreassen curve (i.e. size distribution parameter q is predefined) can be carried out by using commercial existing computer programs such as the EMMA (Elkem Materials Mixture Analyzer) software, developed by Elkem Materials (www.elkem.com/en/Concrete). EMMA uses the Andreassen model and allows us to design mixture of optimally-packed materials. In combination with extensive laboratory testing EMMA provides the basis for the accurate design of ultra-high strength concrete. The constraints considered during the estimation of the mixture proportions were:<br />- The maximum particle size considered as 4 mm. <br />- The resulting value of the q (Andreassen distribution parameter) of the examined mixtures should be as close as possible to the optimal value of 0.37. Values between 0.32 and 0.42 were considered acceptable. <br />Considering the above, several mixtures designs were created and theoretically examined for optimal packing by using EMMA software. Typical grain size distributions of the resulting mixtures shown in resulting graphs. The comparison of the obtained size distributions with the optimal curve (as defined by the Andreassen model) was done graphically, while the proportions of the mixture ingredients were chosen based on a recipe based on Outokumpu waste composition.