کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438466 1398184 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-flowing high-alumina phosphate-bonded refractory castables
ترجمه فارسی عنوان
فلوئورسین مقاوم در برابر فسفات باالی آلومینا فسفات
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Phosphate refractories have a great potential to be applied in petrochemical industries as they present suitable properties at the temperature range used in fluid catalytic cracking units. This study addresses the development of high-alumina self-flowing castables bonded with H3PO4 solution (48 wt% concentration) or a mixture of phosphoric acid and monoaluminum phosphate (MAP) solutions, using MgO as a setting agent. Two polyphosphates (Budit 3H and 6H) and citric acid were evaluated as dispersant additives for these castables. The compositions were characterized by measuring their free-flow and temperature evolution over time, working and setting times, cold and hot mechanical strengths, drying behavior and explosion resistance, eroded volume and thermal shock resistance. The results indicated that high flowability (free flow >100%) could be attained when adding the selected polyphosphates to the mixtures, whereas citric acid acted mainly as a retarder agent for the castables' setting. Moreover, free-flowing compositions with a suitable working time were obtained when combining H3PO4+MAP solutions as main binders. The thermo-mechanical tests pointed out that the most promising designed refractory (containing mixture of H3PO4+MAP and 0.5 wt% of Budit 3H) presented similar or even a better performance than a benchmark commercial vibratable product used in petrochemical units.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 8, 1 June 2017, Pages 6239-6249
نویسندگان
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