Some features of the process of strengthening fibres from fluorine-containing polymers

Conclusions An anomaly in mechanical properties in spinning F2M fluorinated copolymer has been detected.The reason for preference for using a multistage scheme for strengthening fluoropolymers has been analyzed.Translated from Khimicheskie Volokna, No. 1, pp. 31–32, January–February, 1990.     

Prediction algorithms in problems of the automated control system for a technological glass-making process

Translated from Steklo i Keramika, No. 9, pp. 19–20, September, 1989.     

改良UCT分段进水脱氮除磷工艺性能及物料平衡

采用改良UCT分段进水试验装置研究了该工艺处理实际生活废水的脱氮除磷性能,建立了该系统碳(COD)、氮、磷的物料衡算公式,并以稳态条件下试验数据为基础分析评价了各指标的物料分布情况。结果表明,工艺出水水质稳定,抗冲击负荷能力较强,平均出水COD、总氮、总磷含量分别为43.5、8.51、0.29mg·mL-1,满足国家城镇生活污水一级A排放标准。此外,根据建立的物料衡算公式及工艺各反应区污染物指标的转化途径分析发现,高达67.1%的反硝化脱氮作用(包括缺氧反硝化和好氧同步硝化反硝化)是该工艺深度脱氮的根本原因;系统反硝化和释磷过程利用的COD占总去除量的62.1%,体现了该工艺充分利用原水碳源的优势;氮素和COD的平衡率均高达99.8%,证明了所建立的公式的有效性。系统对磷的去除主要依赖于排放的剩余污泥,占总量的71.7%。     

从“雅竹壶”谈紫砂竹型名壶的造型设计创作

在中国传统文化中,"竹"代表着高风亮节的精神修养,它与松、梅一起并称"岁寒三友"。陶都宜兴富有"竹海"美誉,竹与陶一直以来就是宜兴的地域景致,在宜兴数百年的紫砂艺术发展史上,以竹为题材的历史茗壶屡见不鲜。竹型茗壶伴随着紫砂艺术史发展前行,经历了不断创新发展的艺术成熟过程。在明清紫砂艺术鼎     

渣酸制饲料级磷酸氢钙工艺研究

针对湿法磷酸渣酸难以利用的问题,提出一种利用渣酸制备饲料级磷酸氢钙的工艺路线,并以产品的磷氟比[m（P₂O₅）/m（F）]为指标对工艺参数进行优化。实验结果表明,在脱氟工序pH为2.8时,溶液磷氟比大于250,渣酸中的杂质离子富集于白肥中,从而达到净化杂质离子的目的,使得溶液中的各元素指标达到生产饲料级磷酸氢钙的要求。采用石灰乳对脱氟后的酸液进行中和,可得到w（F）<1.8×10^-3、磷氟比大于300且铬、砷、铅等杂质含量都较低的磷酸氢钙产品,满足GB/T 22549—2017《饲料添加剂磷酸氢钙》的要求。     

Investigation of the poly(vinyl chloride) extrusion process using a feed throat with a feed pocket

The effectiveness of the extrusion process depends on a number of factors, the most important being barrel design, e.g., longitudinal or helical grooves; screw, feed opening, and polymer hopper designs are significant in this respect, too. The effect of these factors on the extrusion process has been thoroughly discussed in the available literature. This notwithstanding, there is little information providing insight on the effect of a feed pocket made below the feed opening, on the side of the barrel toward which the screw rotates, on the main characteristics of the extrusion process. For the experiments, five special profile inserts with different feed pocket depths were made and then mounted in the extruder barrel equipped with a 25‐mm diameter screw. The extrusion of plasticized poly(vinyl chloride) (PVC) at the screw speed ranging from 30 to 150 rpm was investigated. Presented graphically as charts, the obtained results show the dependences of extrudate temperature, extruder screw torque, polymer output, power supplied to the extruder and conveyed by the polymer, unit energy consumption and energy efficiency on the feed pocket depth, and screw speed. It has been found that the feed pocket made in the extruder barrel has little effect on the course and effectiveness of plasticized PVC extrusion and does not worsen the studied properties of the received extrudate; yet, it should be taken into account to ensure the highest polymer output and lowest energy consumption. POLYM. ENG. SCI., 54:2037–2045, 2014. © 2013 Society of Plastics Engineers