(中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 為了解決鋁土礦反浮選中微細(xì)粒浮選的難題，設(shè)計出一種旋流浮選器，利用流體動力學(xué)理論，通過模擬計算，建立旋流浮選器中鋁土礦的分離粒度模型，推導(dǎo)出旋流浮選器應(yīng)用于鋁土礦反浮選的理論依據(jù)。對河南某鋁土礦進(jìn)行旋流浮選器浮選實驗研究。結(jié)果表明：通過優(yōu)化調(diào)整旋流浮選器的條件參數(shù)，不預(yù)先脫泥直接進(jìn)行鋁土礦反浮選，最終獲得滿足拜耳法對鋁土礦生產(chǎn)要求的一水硬鋁石精礦，精礦中平均A/S為8.38，回收率為85.16%。
關(guān)鍵字: 鋁土礦；反浮選；旋流浮選器；分離粒度
reverse flotation of bauxite
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:In order to resolve the problem of fine particle flotation in the reverse flotation of bauxite, a new type of air-sparged hydrocyclone was designed, through accurate analog computation based on hydrodynamics theory. The theoretical foundation was deducted for the application of air-sparged hydrocyclone in the bauxite reverse flotation. The flotation tests of air-sparged hydrocyclone aiming at a bauxite from Henan province were studied. The results show that a diaspore concentrate directly used in the Bayer-mineral processing method can be obtained by optimizing the parameters of the hydrocyclone without pre-desliming. The average A/S of the concentrate is 8.38 with a recovery rate of 85.16%.
Key words: bauxite; reverse flotation; air-sparged hydrocyclone; separation size
