(中南大學(xué) 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 為了探明粉末物性差異對混合過程效果的影響，將形狀不規(guī)則的Ti粉、 近球形的Al2O3粉和Al粉分別與Fe粉按相同比例構(gòu)成3種二元粉末體系， 并通過實驗測定了這3種粉末體系在圓筒型混合器中混合過程均勻度的變化, 并對混合過程進行了理論分析。 結(jié)果表明： 粉末物性的差別對混合過程產(chǎn)生明顯的影響，在相同填充率和轉(zhuǎn)速下， 經(jīng)過50s的混合，流動性較好的Al2O3粉、 Al粉與Fe粉的混合均勻度分別達到0.048和0.025， 擴散系數(shù)分別為0.293和0.375； 而流動性較差的Ti粉與Fe粉卻未得到有效的混合， 混合均勻度只達到0.275， 擴散系數(shù)為0.064。
關(guān)鍵字: 圓筒型混合器； 混合； 顆粒； 粉體
（ State Key Laboratory of Powder Metallurgy,
Central South Univeristy, Changsha 410083, China）
Abstract: In order to explore the effect of mixing features between different powders, the experimental and theoretic research of mixing of three groups two-component powder, irregular Ti powder, spherical Al2O3 powder with rough surface and spherical Al powder with smooth surface to mix with nodular Fe respectively on same mass percentage, were carried out with a rotating drum blender. The results show that the characteristics of powder have great influence on efficiency of mixing and diffusion process, the more similar the physical characteristics of the mixing powder, the better the mixing performance. The Fe-Al2O3 and Fe-Al are mixed well in 50s, but Fe-Ti is not, the standard deviation of Fe-Al2O3, Fe-Al and Fe-Ti are 0.048, 0.025 and 0.275, the diffusion efficient 0.293, 0.375 and 0.064, respectively.
Key words: rotating drum blender; mixing; granular; powder
