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Research and application of fluidized flotation units: A review
Jikang Han,Peng Chen,Taishan Liu,Yanfeng Li 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.126 No.-
Flotation cells have a wide range of applications in the field of particle separation as a traditional flotationunit. Due to the declining ore grades and the increasing market demand for mineral resources, recoveringparticles in a wider range of sizes efficiently is a challenge that plants must face, but which is not anadvantage of traditional units. The fluidized flotation cell is a new type of flotation unit that has emergedin the last 20 years and has been proven to have a good separation effect in a larger particle size range. Although studies related to fluidized bed flotation cells have been reported in the literature at this stage,the summary is not comprehensive enough to summarize the operating parameters and hydrodynamicproperties of cells. To fill this gap, this paper summarizes the unique structures and applications of fourfluidized bed flotation cells based on published research work. The factors affecting the operating parametersof cells have been extensively discussed. Progress related to the study of hydrodynamic parameters,such as minimum fluidization velocity, gas holdup, bed expansion and porosity in cells, is also reviewed. The end of the review offers some insights into future fluidized bed research interests.
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한승택,유지강 조선대학교 생산기술연구소 2004 生産技術硏究 Vol.26 No.1
The oxadizole-containing acryl polymers are prepared by reacting dimethyl terephthalate with hydrazine monohydrate followed by cyclodehydration, chain extension, reaction with acryloyl chloride and free radical polymerization. In this study, oxadiazole-containing acryl polymers having alkylene spacer such as ethylene or hexamethylene unit are synthesized and their luminescent properties as well as thermal and solubility properties are investigated. The both of oxadiazole-containing acryl polymers having ethylene(PC2-OXA) and hexamethylene(PC6-OXA) show the photoluminescence at 372nm in THF and around 385nm in a film state. In contrast, analog of PC6-0XA having dimethylarnino group at the end of pendant group(PC6-AOXA), designed to shift emission wavelength to visible range, shows the photoluminescence at about 500nm in THF or in a film state which corresponds to greenish-blue color. PC6-OXA and PC6-AOXA show good solubility in various organic solvents.
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