含油废水处理技术的研究进展

根据油类物质在水中的存在形式及特征,介绍了含油废水的各种处理方法,如气浮、絮凝、吸附等,同时指出各种方法的优势和存在的问题,并介绍了最新的发展状况,提出对含油废水处理的一些建议和展望.     

Hydrogen and Oxygen Bubble Attachment to a Bitumen Drop

Air bubble – bitumen attachment is a critical step in the flotation of bitumen from mined oil sand. In this study, single bubble – bitumen drop attachment was observed directly using a novel experimental technique. Induction time is determined and used as an indication of bubble‐bitumen attachment potency for both hydrogen and oxygen bubbles. The attachment tests were conducted in deaerated municipal water (City of Edmonton tap water) at temperatures ranging from 22–50°C. Induction times measured for hydrogen bubble attachment were shorter than those for oxygen bubbles. Coalescence tests were also conducted in the absence of bitumen, and showed that hydrogen bubbles coalesced more rapidly than oxygen bubbles in both deaerated municipal water and clear (solids‐free) process water.     

FJCR12-4型喷射式浮选机在太西选煤厂的应用

介绍太西选煤厂将XJX T12型机械搅拌式浮选机改造为FJCR12 4型喷射式浮选机的过程,分析了这两类浮选机清水性能试验和生产试验的结果。实践表明,FJCR12 4型浮选机处理量大,动力和浮选药剂消耗少,能回收大于0 5mm及0 5～0 25mm的粗粒煤,具有良好的经济效益。     

蜡防印花生产废水处理工艺

对蜡防印花生产废水清污分流处理工艺进行了研究。结果表明：机械洗蜡废水分流后经双级气浮蜡回收处理，蜡回收率和处理水回用率可达90％以上；皂化脱蜡废水分流后采用酸化-加压溶气气浮技术处理，蜡回收率可达95％以上；皂化脱蜡处理水与印花废水经内电解预脱色处理，脱色率可达92％以上；各段处理废水与其它废水混合后经混凝气浮-生物接触氧化-沉淀-过滤组合工艺处理后，出水水质可达行业一级排放标准。该处理工艺处理效率高、费用低，经济效益和环境效益显著。     

Characterisation of three different impellers using the LDV-technique

A characterisation of three commonly used impellers was made in this study by measuring local mean velocities and the fluctuations of these velocities with the LDV technique. The data was used to estimate volumetric flow, velocity fluctuations and turbulent intensity in the impeller region of the tank. The impellers investigated were a high flow impeller, a pitched blade turbine and a Rushton turbine. The cylindrical vessel used was made of Perspex, had a dished bottom (DIN 28013), was equipped with four baffles and had an inner diameter of 0.45 m. It was found that the bulk velocities could be scaled with the tip-speed of the impeller (ND). The flow rate at constant impeller speed increased in the order high flow impeller — Rushton turbine — pitched blade turbine. The corresponding order for the turbulence fluctuation is: high flow impeller — pitched blade turbine — Rushton turbine. The velocity profile of the flow out from the high flow impeller was furthermore, not as smooth as could be expected.     

用唐钢石人沟铁精矿生产超级精矿

以石人沟铁矿精矿粉为原料生产超级铁精矿，进行了磨矿—反浮选、分级—反浮选和分级—低磁场磁选等试验，并按磨矿—反浮选方案建成了生产超级铁精矿的选矿厂。实践证明阳离子反浮选是生产低硅高纯铁精矿的可靠工艺。     

Modelling Gas Holdup in Flotation Column Froths

A one‐dimensional steady‐state model is developed for the prediction of axial variation of the gas holdup in flotation column froths. Froth is considered as an inverse fluidized bed of bubbles and hence the frictional pressure gradient is obtained based on the energy balance. Pressure gradient can also be obtained from the Ergun equation with adjustable constants. The model correctly captures the effect of superficial gas velocity, superficial liquid velocity and bubble diameter on the variation of the gas holdup along the froth height. The predictions of the model are in agreement with the experimental data from the literature.     

良庄煤矿发展煤炭加工与综合利用的有效途径

良庄煤矿在发展煤炭加工与综合利用方面探索了一些有效途径 ,在洗选加工方面采用重介选煤工艺代替跳汰选 ,运行效果良好 ,利用浮选精煤制备水煤浆及燃煤锅炉改烧水煤浆、压滤煤泥发电及矸石制砖等方面均有显著的经济和环保效益     

胶磷矿双反浮选工艺研究

对湖北某地镁硅含量较高的难选胶磷矿采用阴离子捕收剂反浮镁、阳离子捕收剂反浮硅的双反浮选工艺,取得了磷精矿P2O5品位32.51%、回收率91.23%、MgO含量0.87%、R2O3含量2.37%的良好指标,实现了胶磷矿与白云石、长石等杂质矿物的有效分离.     

(NH4)2SO4-CuSO4-CTMAB-湿法磷酸体系浮选分离碘(I-)的研究

研究了硫酸铵-硫酸铜-十六烷基三甲基溴化铵-湿法磷酸体系浮选碘(I-)的行为及其与常见离子分离的条件。试验表明,在1.0g(NH4)2SO4存在下,体系中硫酸铜和十六烷基三甲基溴化铵(CTMAB)的用量分别为(2.4×10-2mol/L)0.5ml和0.025g,I-与Cu(Ⅱ)形成的CuI沉淀能被CTMAB浮选,而其它非金属离子不被浮选,从而实现碘(I-)与这些离子之间的定量分离。本法对湿法磷酸中微量碘进行了定量浮选分离,结果满意。