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Fine powder additive; Bed expansion; Group A powder; Fine content
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Improvement Of Fluidization Ability For Group A Powders By Fine Powder Additives, Xiaowei Zhang
Improvement Of Fluidization Ability For Group A Powders By Fine Powder Additives, Xiaowei Zhang
Electronic Thesis and Dissertation Repository
Group A powders are widely utilized in the industry because of the great quality of fluidization, which can be affected by the fine content. This project investigates the feasibility that employing the fine powders (≤ 20 μm) as additives to further improve the fluidization ability of Group A powders. Three additives, Coal-15, GB-6, and SiO2-5 are added into FCC-76, based on various volume fractions. The minimum fluidization velocity (Umf), bed expansion ratio (BER), and dense phase expansion ratio (DER) are tested to evaluate the quality of fluidization. Coal-15 can slightly improve the fluidization quality. High …