为了解决黑色页岩(BS)在作为聚合物填料应用过程中与偶联剂相互作用差、所含硫元素在加工过程中异味重等问题,本研究对黑色页岩进行煅烧加工,利用XPS、FTIR、SEM等分析了煅烧对页岩组成和形貌的影响.随后制备了煅烧BS/高密度聚乙烯(HDPE)复合材料,并测试了复合材料的热学性能、力学性能和电学性能.结果表明:煅烧去除了BS中的有机质和硫铁矿,600℃下煅烧后BS的碳原子摩尔比由35.95%下降到6.98%,而硫原子摩尔比已经不可测出,页岩保持层状结构并有片层裂碎现象,且页岩层间距略有缩小.煅烧BS/HDPE复合材料的冲击强度比天然BS/HDPE的冲击强度提升显著,这是因为煅烧后的BS与HDPE之间存在大量的界面粘接,而天然BS与HDPE之间完全分离.煅烧BS/HDPE复合材料的体积电阻率维持在4.79×1016 Ω·cm及以上,表明煅烧BS的加入对复合材料的介电性能影响较小,复合材料拥有较好的电绝缘性能.
为了研究黑色页岩作为填料应用于塑料工业的可能性,本文对桂林地区的黑色页岩进行了成分和形貌研究,发现其为纳米层状结构,主要由二氧化硅、钾长石及有机碳组成.利用不同的偶联剂与表面活性剂改性黑色页岩,制备了黑色页岩/HDPE复合材料,并对其力学性能、形貌、体积电阻率和介电常数进行了研究.结果表明:铝酸酯偶联剂与十二烷基苯磺酸钠能够改善页岩与HDPE之间的相容性,当页岩填充量为50份时,黑色页岩/HDPE复合材料的拉伸强度、冲击强度和体积电阻率有所降低,拉伸强度仍保持在23.47 MPa,冲击强度最高为6.39 kJ/m2,体积电阻率也可维持在1014 Ω·cm以上,保持了较好的力学性能和绝缘性能.
目的 为了提高阀口袋套袋机器人的工作效率,提出基于改进粒子群算法的阀口袋套袋机器人时间最优轨迹规划方法.方法 首先,通过逆运动学方程反解出操作空间轨迹对应的关节空间角度值.其次,采用4–3–4混合多项式对阀口袋套袋机器人的关节空间轨迹进行插值拟合.最后,在速度约束条件下,利用改进粒子群算法对阀口袋套袋机器人的运行时间进行优化处理.结果 仿真结果表明,改进粒子群算法可以在保证阀口袋套袋机器人运行平稳的条件下将总运行时间缩减41.66%,实现了阀口袋套袋机器人在关节空间中时间最优的轨迹规划.结论 该方法可有效地提高机器人工作效率,延长机器人的使用寿命,为阀口袋套袋机器人稳定可靠运行提供了科学依据.
本文介绍了项目“氢氧化钙智能化自动生产线的研制”的技术原理、技术路线及工艺流程、主要技术指标、技术创新点、技术特点等。本项目“氢氧化钙智能化自动生产线的研制”采用本公司的八项专利技术。控制系统 采用手动+ 自动双控模式智能化配水系统;预消化系统采用可拆装合金耐磨衬套预消化刀片,优化单轴达到双轴的分散均匀效果;消化系统利用消化热量,5 分钟可将系统水温加热至 80℃左右,加快了消化速度和制粉率。
中国拥有丰富的黑色页岩矿物资源,制备和开发黑色页岩/聚合物复合材料对提高其利用价值及实现可持续发展有重要意义.本文首次利用热重分析对黑色页岩/HDPE复合材料的非等温热分解动力学进行了研究,运用Kissinger法和Crane法计算了黑色页岩/HDPE复合材料的热分解动力学参数.研究表明,黑色页岩对复合材料的热分解行为无明显影响,黑色页岩/HDPE复合材料热分解反应均为一阶热分解反应,热分解活化能在269.31-311.88kJ/mol之间,与纯HDPE相近.因此,黑色页岩作为填料不会增加复合材料热分解的风险,为黑色页岩的进一步开发和应用提供了基础.
The patent factors of domestic particle reinforced metal matrix composite,including patent application tendency,regional distribution,main assignees,main IPC and technical characteristics,were analyzed by method of patent information analysis.The vital patentees were dissected in-depth,and the core technology,the growing trend of key technology,the developing and applications were identified.In order to provide a useful competitive intelligence for grasping the development trend and driving force of China's particle reinforced metal matrix composite materials industry,correcting the industrial development orientation and identifying industry demands in future market.
介绍了HC2000超大型纵摆式磨粉机的技术原理、主要技术参数及技术创新点,分析了设备在研制过程中关键技术与工艺特点。
This paper introduces HC1700 large longitudinal mill technology principle,including technical parameters and technical innovations.It tells of the key technology and craft of the equipment in developing process,user opinion and project appraisal conclusion.
The invention discloses a compound-channel pendulous grinding machine, which is used for performing superfine grinding and comprises a machine cover, a base and an air return box. A flow guide cover is additionally arranged in the machine cover to form an interlayer, an upper opening of the interlayer is arranged at a classification zone of a classifier, a lower opening of the interlayer is arranged at the position between the machine cover and the base, the air return box is higher than the base and encloses the lower opening of the interlayer to form a bypass channel communicated with the lower opening of the interlayer and a main stream channel communicated with an inner cavity of the flow guide cover through an air port of the base, and the classifier is a superfine classifier. A superfine powder processing system comprises a crusher, a lifter, a material storage hopper, the compound-channel pendulous grinding machine, the superfine classifier, a collector and an induced fan. The compound-channel pendulous grinding machine and the superfine powder processing system have the advantages of greatly reducing air flow speed in an inner cavity of a main machine, reducing suspension of powder, facilitating repeated crushing of powder, and being capable of crushing by integrally using grinding, friction and shear, low in energy consumption and high in efficiency.
The present invention discloses a method for ultra-fine grinding of ore powders composite channel pendulum mill, including hood, base and back to the gas tank, to form a sandwich inner hood additional shroud, catchy sandwich in grade machine grading area, mezzanine under the hood mouth opened in connection with the base, and the base is higher than the return air box enclosed mezzanine under the mouth, under the mouth is formed with the interlayer communication flow channel and the inner side of the air inlet through the base and shroud the main channel of communication with the chamber, the ultrafine classifier classifier. Ultra-fine powder processing system comprises a crusher, elevator, storage hopper, the composite channel pendulum mill, ultra-fine classifier, collector and draft fan. The present invention greatly reduces the host cavity of air velocity, reduce dust suspension, advantageously pulverized dust repeat, is a set of rolling friction, shearing crushing the powder mill equipment, with low energy consumption, efficiency high.
Modern scale production of ultra-fine powder is a trend in ultra-fine powder in processing industry.The main requirment of grinding equipment is stability,high efficiency,and energy conservation.HCM dual-cone impact mill is demanded to develop to meet the need of modern scale production of ultra-fine powder with its multi-stage grinding technology by two cones counterrotating and crushing in two chambers.HCM dual-cone impact mill is noted for high impacting strength,high efficiency on energy transferring and long using time.The stepless adjustment of powder fitness,low energy consumption and Environmental Protection of HCM dual-cone impact mill are verified in practice.As all the design guarantee figures have been reached,it can meet the requirment of all ultra-fine powder processing.