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染料超微粉碎机理及最佳操作工艺探讨 总被引:5,自引:0,他引:5
水不溶性染料的粉碎在染料生产过程是一道最为关键的工序,粉碎过程及机理地十分复杂,在一个粉碎休系中,必须根据染料本身的理化性质,确定相应的粉碎设备,分散剂,粉碎工艺等技术问题,本文对染料超微粉碎机理最佳操作条件进行了探讨。 相似文献
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《中国材料科技与设备》2006,3(6):8-8
国家重点高新技术企业浙江丰利粉碎设备有限公司研发的国家重点新产品和国家火炬计划项目。该机结构原理先进,适用于无机物、有机物的通用粉碎,拥有最先进的机理——超声波粉碎和喷射功能,高频振动,连续工作,同时进行干燥和粉碎。粉碎率高,粉体粒度细,能耗小、噪声低,适用于化工、农药、染料、助剂、医药、食品、饲料、非金属矿、各类塑料、有色金属(镁、锌等)等行业,能加工一般微粉机难以粉碎的韧性、纤维性、热敏性等有机物。专家认为该机攻克了常温下有机物料超细粉碎难题,标志着我国微粉碎工业取得了突破性进展,可替代进口。 相似文献
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论述了粉碎机构学是由机构学衍生而来,与相关粉碎理论结合,应用于物料粉碎领域里的一门工程基础学科。随着矿产资源高效节能开发和诸多领域的粉碎作业增多,对粉碎机械的使用要求不断发生变化,粉碎机构学越来越成为重要的基础理论,并逐渐形成新的学科分支。随着现代机械设计理论的发展,粉碎机构学理论也将在实践中不断得到丰富、发展和完善。 相似文献
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气流粉碎机动态参数对粉碎效果影响的研究 总被引:6,自引:0,他引:6
超微气流粉碎在现代材料深加工中起着重要作用。本文中通过实验研究了在扁平式气流粉碎机工作过程中粉碎工质压力、进料压力、加料量等动态参数对产品粉碎效果的影响,研究了这些参数与产品粉碎效果之间的关系,从而选定最优参数使气流粉碎机达到最佳粉碎效果。 相似文献
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粉石英细磨过程中的团聚现象 总被引:4,自引:0,他引:4
以粉石英为例,揭示了超细粉碎过程中特有的团取现象。以大量实验数据和理论分析为基础,描述和论证了团聚现象的种种表现,具有普遍的意义。为在超细粉碎中合理选择工艺条件,有效控制粉碎极限和延缓粉碎平衡,推迟“逆粉碎”的出现提供了一定的参考依据,对推进粉体技术的发人有一定的理论意义和实用价值。 相似文献
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高压水射流超细粉碎技术的研究与应用 总被引:10,自引:1,他引:9
高压水射流粉碎技术的主要特点是效率高、耗能低、拉应力破碎原理、良好的解理性以及能够很好地保护矿物的天然结晶形貌。本文介绍了高压水射流粉碎技术的研究状况 ,以及将高压水射流粉碎技术用于永磁铁氧体原料粉碎工艺的试验研究、制备水煤浆的试验研究 ,以及制备珠光云母粉的工业应用 相似文献
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《Advanced Powder Technology》2007,18(1):39-51
A general approach for the quantitative and systematic characterization of fragmentation problems, which is based on the Weibull statistics, is presented. A model, initially developed for materials stressed under impact with respect to their breakage probability, has been successfully applied to the characterization of compressive comminution, fragmentation of nanoparticle agglomerates and destroying of adhesive bonds. The experimental results from the slow compression comminution and from the comminution by falling weight match for various materials and particle sizes exactly to the master curve deduced for impact comminution. However, the material parameters determined for compression comminution are not identical for one and the same material to that determined by impact comminution. This indicates that the two model parameters are not pure material characteristics as assumed from the impact experiments, but depend on the stress mechanism. The dependence of the fragmentation degree on the particle size and the energy input observed when impacting particles in the micrometer to millimeter range has been proven also for nanoparticle agglomerates. Furthermore, a model analogous to that for breakage has been deduced for the quantification of the failure of adhesive bonds. 相似文献
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Three dimensional numerical simulations of particles motion in a given geometry pneumatic conveying system are conducted in
order to obtain a better understanding of the attrition process. A new and innovative procedure of implementing empirical
comminution functions (Kalman et al. in Gran Mat 11:253–266, 2009) into DEM-CFD simulations was used and modified. The comminution
functions include: initial strength distribution, selection function, breakage function, equivalence function and fatigue
function. The implementation involves converting the probability comminution functions into individual particle properties
by a random method and then converting the velocity dependent comminution functions into strength-dependent ones. The predictions
of the numerical simulations are used to analyze the flow field characteristics and the size reduction process. 相似文献
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Effect of operating parameters on color and COD removal performance of SBR: sludge age and initial dyestuff concentration 总被引:2,自引:0,他引:2
Effect of sludge and initial dyestuff concentration on color and COD removal performance of anaerobic-aerobic sequential batch reactor was investigated. Remazol Red RR a vinylsulphonyl (VS) and monochlortriazine (MCT), reactive azo dye was used in the study. Sludge age was varied between thetaC=12 days and thetaC=30 days and dyestuff concentration was between D0=50 and D0=500 mg l(-1). The maximum color and COD removal was obtained as 95% and 70% for D0=60 mg l(-1) and COD0=800 mg l(-1) at 15 days sludge retention time, respectively, and no further improvement was observed when sludge age was increased to 30 days. The main color removal phase in this operation system was the anaerobic phase. Because, the color removal efficiency was already above 95% under anaerobic condition and therefore, the contribution of aerobic phase to color removal was negligible. Increasing dyestuff concentration did not significantly affect the decolorization. It was possible to obtain over 90% dyestuff removal even at D0=500 mg l(-1). SBR system reduces 1000 mg l(-1) initial COD concentrations to about 400 mg l(-1) for dyestuff concentration up to 150 mg l(-1). COD removal efficiency decreased from 70% to 60% by increasing initial dyestuff concentration from 100 to 500 mg l(-1). The results indicated that dyestuff and COD are mainly used by anaerobic organisms and aeration does not improve the performance of SBR system. 相似文献