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during Bayer digestion at high temperatureLI Xiao-bin, LI Chong-yang, QI Tian-gui, ZHOU Qiu-sheng, LIU Gui-hua, PENG Zhi-hong(National Engineering Laboratory for Efficient Utilization of Refractory... percentage reaches above 90% after reaction of 1 h under the Bayer process. The iron-hydroxyl complexes are generated firstly by the reaction of OH- of sodium aluminate solution and Fe2+ of the pyrite surface......
liquor LIU Ji-bo, CHEN Qi-yuan, ZHANG Mu-qun, YIN Zhou-lan, ZHANG Ping-min (1. Zhengzhou Light Metal Research Institute China Aluminium Corporation, Zhengzhou 450041, China; 2. College of Chemistry... aluminate liquor, the ultrasonic induced hydroxyl free radicals was detected by electron spin resonance(ESR) spectroscopy using DMPO (5, 5-dimethyl-1-pyrroline-N-oxide) as a spin trap. The relationship......
Effects of new flocculants on settlement of Bayer red mud XU Fang, HU Hui-ping, CHEN Qi-yuan (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China) Abstract: A series of experiments on Bayer red mud generated from Chinese diaspore bauxite were performed using experimentally-synthesized new flocculants ASAM (obtained from acryamide, sodium acrylate and β......
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liquor by activated seed ZENG Ji-shu, YIN Zhou-lan, CHEN Qi-yuan (School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China) Abstract: The aluminium hydroxide seed was activated by boiling distilled water. The effects of activated seed on decomposition ratio of seeded sodium aluminate liquor and particle size distribution were investigated. The experiments were......
人造金红石母液净化制取软磁氧化铁粉研究王彦华1,梁英2(1.攀钢集团研究院有限公司,四川成都 6117312.攀枝花钢钒有限公司 冷轧厂,四川攀枝花 617023)摘 要:针对人造金红石母液中影响材料磁性能的硅,铝,钙,镁杂质存在形态,采取控制溶液pH值,添加除杂沉淀剂的方法,通过正交试验和验证试验,获得wSiO<sub>2</sub>≤16.7×10-6,wCaO<5×10-6,wMgO<5×10-6,wAl<sub>2</sub>O<sub&......
拜耳赤泥脱硫工艺的应用基础研究黄芳1,李军旗1,赵平源1,陈义1,张志刚1(1.贵州省贵阳市贵州大学材料科学与冶金学院)摘 要:拜耳赤泥脱除燃煤烟气SO2的新工艺符合"以废制废,变废为宝"的原则.利用拜耳赤泥作为脱硫剂,在填料吸收塔内进行脱硫,脱硫效率高,流程简单,经济,适应性强.结果表明,脱硫率与液固比xA,温度xB和鼓风量xC关系的回归方程为η=-0.52xA2+7.7225xA+0.0056xB2-0.52xB+29xC2-4.3xC+77.15.脱硫终点pH值控制在5.0左右为宜.脱硫产物主要为亚硫酸钙......
:拜耳法赤泥；铁回收；建材；综合利用 中图分类号:TG 146.2 文献标识码:A Recovering iron and preparing building material with residues from Bayer red mud LIU Wan-chao, YANG Jia-kuan, XIAO Bo... calculation analysis. Key words: red mud; Bayer process; iron recovery; building materials; comprehensive utilization ......
类号:TF802 文献标志码:A 文章编号:1672-7207(2015)07-2398-07 Bayer red mud sintering process...(Fe2O3)/n(Al2O3 ) in the red mud sinter is 0.3. Key words: Bayer red mud; sintering process; iron mineral; reduction 随着我国氧化铝工业的快速发展,铝土矿消耗量大且增长迅猛,国内优质铝土矿资源已日渐枯竭,经济高效地利用我国大量存在的高铁高硅中低品位铝土矿对我国氧化铝工业的安全可持续发展具......
(SND). The variation and distribution of parameters such as flow velocity, concentration of dissolved oxygen (DO) and mixed liquor suspended solids (MLSS) in oxidation ditch were monitored and analyzed...; dissolved oxygen (DO); mixed liquor suspended solid (MLSS); simultaneous nitrification and denitrification (SND) 1 Introduction Oxidation ditch system, which was originated from Netherlands, has many......
