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<正>国家高新技术企业浙江丰利粉碎设备有限公司吸收消化国外微粉粉碎先进技术再创新,研制成功的新一代气流微粉设备——气流式涡旋微粉机,最近获得国家实用新型专利(ZL 201120387557.7)。该专利具有粉碎效率高、可自由调节产品粒度、分级 相似文献
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<正>国家高新技术企业浙江丰利粉碎设备有限公司吸收消化国外微粉粉碎先进技术再创新,研制成功的新一代气流微粉设备———气流式涡轮微粉机,日前获得国家实用新型专利(专利号:201120387557.7)。 相似文献
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吴红富 《硫磷设计与粉体工程》2013,(2):48
国家高新技术企业浙江丰利粉碎设备有限公司吸收消化国外微粉粉碎先进技术再创新,研制成功的新一代气流微粉设备——气流式涡轮微粉机,日前获得国家实用新型专利(专利号:201120387557.7)。该专利具有粉碎效率高、可自由调节产品粒度、分级效果理想、进料量均匀且可调节、散热 相似文献
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超微气流粉碎机制备的再生微粉既有胶凝活性,又能有效控制粉体粒径分布.利用再生微粉取代部分水泥制备泡沫混凝土,创新性地将再生微粉的化学胶凝性和粉体粒径可控导致的物理增强效应结合起来实现泡沫混凝土强度的提高和成本的降低.经过优化实验确定泡沫的体积掺量为75%,超微气流粉碎机制备的再生微粉粒径分布在10~60μm之间.研究结果表明:再生微粉替代水泥有利于泡沫混凝土后期强度的提高.当再生微粉的掺入量为10%时,泡沫混凝土28 d抗压强度增强效果最优,其抗压强度达到3.09 MPa,相比纯泡沫混凝土提高了11.6%.通过进一步研究,所制备的复合泡沫混凝土强度变化原因在于:超微气流制备的再生微粉粒径主要集中在26μm左右,32μm以下的颗粒累积分布达到85%,而水泥中3~32μm颗粒含量对水泥的28 d强度起关键作用,此粒度再生微粉的掺入调节了体系的颗粒级配比,使得体系粒度分布于26μm左右的比例有所提高,优化了泡沫混凝土的骨架部分填充效果,从而提高了其抗压性能. 相似文献
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A process for the SAS coprecipitation of ibuprofen with the polymers poly(l-lactic acid) and Eudragit L100 was successfully carried out. The particle size was reduced to micrometer and near nanometer ranges. The morphology of the raw material changed to spherical upon processing for both poly(l-lactic acid)/ibuprofen particles and eudragit/ibuprofen particles. The eudragit-based particles were significantly smaller than those obtained with poly(l-lactic acid). Ibuprofen release profiles were determined for simulated gastric and intestinal fluids in order to study the effect of the polymer and to identify the appropriate systems for different administration routes. The in vitro release profiles for both polymer/drug systems showed a slower and more controlled release in comparison to the unprocessed ibuprofen. Moreover, the effects of pressure, temperature, initial concentration of the solution and drug-to-polymer ratio on the particle size and morphology of these drug/polymer systems have been evaluated. According to the XRD, DSC and FTIR data, physicochemical interactions do not occur between ibuprofen and the polymers and a proportion of the ibuprofen molecules probably remained on the microparticle surface. 相似文献
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建立了高炉渣颗粒运动与换热过程的数学模型,利用FORTRAN语言编写程序,通过四阶Runge?Kutta方法求解其动力学和传热方程,计算时充分考虑熔渣与冷却空气主要热物性参数随温度的变化,采用温度回升法计算熔渣凝固过程释放的潜热,提出在气淬空气中添加喷雾强化熔渣冷却,考察了渣粒尺寸对换热过程的影响。结果表明,飞行过程中渣粒速度受气淬空气影响先增大后减小;温度降低趋势随运动距离增加而减小,主要受对流换热系数影响,凝固过程持续时间较短;喷雾使渣粒在飞行过程中整体冷却速率明显升高,最终温度明显降低,而对熔渣的运动影响较小;相同初始工况下,熔渣粒径越小,运动越易受流场影响,渣粒整体冷却速率较高,换热效果越好。 相似文献
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Particle deposition in a fully developed turbulent duct flow was studied. The random walk model of Lagrangian approach was used to predict the trajectories of 3000 particles with a density of 900 kg/m3. The effects of thermophoretic force and air humidity were also considered. The results were compared with the previous studies with a particle size range of 0.01–50 μm and air flow velocity of 5 m/s. The profile of dimensionless deposition velocity with relaxation time presents a V-shaped curve and the results are in good agreement with the previous studies.The effects of air temperature and humidity on particle deposition with a particle size of 1 μm were also investigated. The results show that thermophoretic force accelerates particle deposition onto the duct walls with increasing temperature difference between air flow and the duct wall surface. Meanwhile, it was found that particle deposition velocity increases with air humidity. 相似文献