The performance of a flotation circuit is largely the result of the operator's response to visual clues. This includes manipulation of the gas input and how it is distributed to cells in a bank. A new gas dispersi...The performance of a flotation circuit is largely the result of the operator's response to visual clues. This includes manipulation of the gas input and how it is distributed to cells in a bank. A new gas dispersion technology was presented which was conducted to perform characterization tests in Outokumpu 30 m3 and 50 m3 flotation cells installed at Thompson Vale's concentrator, and subsequent data analysis. The experimental program was designed to establish "as-found" baseline conditions for each cell of the two-parallel banks in the scavenger-cleaner and recleaner circuit, to select and characterize one typical cell in the two banks with either different frother concentrations or different air flow rates, and establish what variables can be manipulated in future characterization work. A three-parameter model was developed in order to link the bubble size and frother concentration. This relationship can be used to correlate gas dispersion change to improved metallurgical performance.展开更多
联合国国际减灾战略(UN/ISDR)刊行的《世界防灾白皮书》(2011年版),根据全球气候变化、自然灾害发生情况及各国防灾减灾工作的实施,概括地总结认为:自2005年世界减灾大会上通过并开展实施了《2005～2015年兵库行动框架》(Hyogo Framewor...联合国国际减灾战略(UN/ISDR)刊行的《世界防灾白皮书》(2011年版),根据全球气候变化、自然灾害发生情况及各国防灾减灾工作的实施,概括地总结认为:自2005年世界减灾大会上通过并开展实施了《2005～2015年兵库行动框架》(Hyogo Framework for Action)以来,各国在早期预警、灾前准备、应急应对等防灾抗灾方面取得了卓有成效地进步。但同时,随着科学技术与信息通信手段的日新月异,人类与科技相互依存,并越发依赖于现代科技手段。然而,复杂的技术系统及人类与科技互为依存关系将会导致新的灾害风险,这种脆弱性(Brittleness)已日趋表面化。日本矿产资源匮乏,却能自20世纪50年代开始,经济高度增长持续了近20余年,被世界称之为"东洋的奇迹",且这一奇迹至今尚未被其他国家打破,所以日本是名副其实的"经济大国"。同时日本岛国地处太平洋板块与亚欧板块挤压碰撞的地壳断裂带边缘,日本国土面积仅为世界的0.25%,而在世界发生的自然灾害中日本所占比例为:6级以上地震20.5%,火山喷发7.0%,灾害造成的经济损失占世界11.9%,是名副其实的"灾害大国"。但日本灾害死亡率仅占世界的0.3%。日本的防灾经验值得学习。专栏将邀请原日本兵库县知事贝原俊民、"东日本大震灾复兴构想会议"议长五百旗头真、日本灾害复兴学会会长室崎益辉、日本灾害经济学大家林敏彦等执笔,从政府、学者和社会多层次,从政治、外交和经济等多角度,论述日本防灾与灾后重建中的"失败经验"。展开更多
基金Project(2012BAB14B05)supported by National Key Technology Research and Development Program of the Ministry of Science and Technology of China
文摘The performance of a flotation circuit is largely the result of the operator's response to visual clues. This includes manipulation of the gas input and how it is distributed to cells in a bank. A new gas dispersion technology was presented which was conducted to perform characterization tests in Outokumpu 30 m3 and 50 m3 flotation cells installed at Thompson Vale's concentrator, and subsequent data analysis. The experimental program was designed to establish "as-found" baseline conditions for each cell of the two-parallel banks in the scavenger-cleaner and recleaner circuit, to select and characterize one typical cell in the two banks with either different frother concentrations or different air flow rates, and establish what variables can be manipulated in future characterization work. A three-parameter model was developed in order to link the bubble size and frother concentration. This relationship can be used to correlate gas dispersion change to improved metallurgical performance.
文摘联合国国际减灾战略(UN/ISDR)刊行的《世界防灾白皮书》(2011年版),根据全球气候变化、自然灾害发生情况及各国防灾减灾工作的实施,概括地总结认为:自2005年世界减灾大会上通过并开展实施了《2005～2015年兵库行动框架》(Hyogo Framework for Action)以来,各国在早期预警、灾前准备、应急应对等防灾抗灾方面取得了卓有成效地进步。但同时,随着科学技术与信息通信手段的日新月异,人类与科技相互依存,并越发依赖于现代科技手段。然而,复杂的技术系统及人类与科技互为依存关系将会导致新的灾害风险,这种脆弱性(Brittleness)已日趋表面化。日本矿产资源匮乏,却能自20世纪50年代开始,经济高度增长持续了近20余年,被世界称之为"东洋的奇迹",且这一奇迹至今尚未被其他国家打破,所以日本是名副其实的"经济大国"。同时日本岛国地处太平洋板块与亚欧板块挤压碰撞的地壳断裂带边缘,日本国土面积仅为世界的0.25%,而在世界发生的自然灾害中日本所占比例为:6级以上地震20.5%,火山喷发7.0%,灾害造成的经济损失占世界11.9%,是名副其实的"灾害大国"。但日本灾害死亡率仅占世界的0.3%。日本的防灾经验值得学习。专栏将邀请原日本兵库县知事贝原俊民、"东日本大震灾复兴构想会议"议长五百旗头真、日本灾害复兴学会会长室崎益辉、日本灾害经济学大家林敏彦等执笔,从政府、学者和社会多层次,从政治、外交和经济等多角度,论述日本防灾与灾后重建中的"失败经验"。
