Abstract
1. When choosing a material for the construction of a roasting oven one has to consider not only the standard properties of the refractories at hand but also their ability to slow down the desulfurization process of petroleum cokes. Ashing of the coke due to abrasive wear of the lining deteriorates the quality of the commercial coke not only with regard to ash content but also with regard to sulfur content. 2. The desulfurization is slowed down even more when the ratio of alkaline to acid oxides (slag ratio) MgO+Cr2O3+CaO/Al2O3+SiO, of the refractory material is higher. 3. Refractories with a high siO2 content are not suitable for coke refining ovens because the SiO2 reduces to SiO which then escapes. 4. Refractories with a high Al2O3 content should be used in the construction of coke roasting ovens. 5. Refractories containing magnesium, calcium, and chromium oxides and which are likely to crumble during coke refining are not suitable to line the walls of the roasting kilns in coke desulfurization plants.
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