| 摘要 |
A process for producing agglomerates, such as pellets or briquettes, of high strength from a mixture of fine metal oxide material and reduction carbon is to be provided which can be carried out at low engineering cost even where no or insufficient waste heat energy is available. Using a mixture which, in addition to fine metal oxide material such as iron oxide (Fe2O3) or roasted pyrite and coal dust, in particular reduction carbon, such as lignite coke dust, also contains cement and/or lime as binders and in which the mixing partners are brought before the homogeneous mixing to a grain fineness of < 100 mu m, preferably < 65 mu m, pelleted or briquetted after the mixing and then stored under normal pressure (760 mm Hg) and normal temperature (10 to 25 DEG C), this is achieved by adjusting the mixing proportion of cement and/or lime to at most 10 % and using the carbon mixing partner with a water content of up to 15 %, pelleting or briquetting the mixture within a time of less than 30 minutes after the binder addition and at the same time bringing it to an increased water content of between 18 and 26 %, and finally stacking the pellets or briquettes in layers under weather protection and thus hardening them in the open air for 3 to 14 days, preferably 8 to 9 days.
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