竹浆纤维的性能及发展前景

竹浆纤维又称再生纤维素纤维,是一种新型的绿色健康纺织原料。由于其特殊的性能成为国内纺织开发的热点之一,具有极大的开发前景。介绍了竹浆纤维的性能特点、生产工艺过程以及目前存在的问题,展望了竹浆纤维的发展前景和趋势。     

冲击矿压及岩石巷道卸压爆破影响参数研究

介绍了冲击矿压的机理的几种理论认识,并对岩石巷道实施卸压爆破时的岩石相关的4个影响参数:刚度、脆性、岩体断裂程度、岩体静力学断裂,以及4个爆破影响参数:爆破的方向、爆破的宽度、爆破能量,炸药装药的密闭性进行研究.     

Increasing the strength of metallurgical coke by adding modified petroleum coke to the coking batch

Box-coking data show the possibility of increasing the yield and strength of metallurgical coke by introducing a coking additive in the batch. Specifically, this additive is a product of slow coking of heavy petroleum residues, characterized by excellent thermoplastic properties: clinkering properties and plastic temperature range. A Russian patent has been obtained for the coking additive.     

Evolution of the microstructure and phase composition of materials based on the fluorohydroxyapatite–zirconia–alumina system during sintering

We have studied the influence of the sintering temperature, Al₂O₃ additions, and liquid-forming sintering aids on the phase composition and microstructure of fluorohydroxyapatite-based composite ceramic materials containing 20 and 60% zirconia. The addition of alumina has been shown to prevent secondary recrystallization processes during sintering and contribute to stabilization of tetragonal zirconia. The addition of the sintering aid has made it possible to lower the sintering temperature to 1200°C.     

分层采油工艺管柱受力分析及优化

针对分采泵分层采油井在生产中普遍存在泵效低、效果不理想等问题,对分层采油工艺管柱进行受力分析,计算中和点位置,优化管柱结构,减弱管柱弯曲对分采泵的影响程度。同时基于理论和生产实际经验,提出补偿自锁和低坐封力封隔器、分采泵配合过桥管加厚和扶正措施等技术措施,应用于生产能极大地提高分采泵分层采油效果。     

应用改进蚁群算法求解柔性作业车间调度问题

将蚁群算法信息素更新规则进行改进,规定只有产生至今最优解的蚂蚁才能释放信息素,且只更新全局信息素,减少了传统蚁群算法的时间复杂度,提高了问题的求解效率。分析了柔性作业车间调度的特点,选取三个性能指标作为求解目标,设定其求解优先级,并建立相应的调度模型。将改进蚁群算法应用于柔性作业车间调度算例的求解,与其它算法比较,平均解有很大提高,表明了该算法求解柔性作业车间调度问题的有效性。     

SiO2溶胶胶凝过程动力学研究及其机理分析

以硅酸钾为硅源,用激光纳米粒度仪及乌氏黏度计分别测定了酸性(pH=4.05)条件下不同浓度的SiO2溶胶胶凝过程中黏度和粒径随时间的变化。实验结果及动力学分析表明:从溶胶到凝胶的整个胶凝过程,分散相(胶粒)生长按两种模式进行。在胶凝的前期,胶粒的生长主要是通过多聚体与胶粒之间的缩聚反应进行,由此引起的黏度随时间的变化符合线性方程η=η0+kt;在胶凝中后期,胶粒的生长主要是通过大颗粒胶粒(团簇)之间的凝胶化生长过程进行,由此引起的黏度随时间的变化符合线性方程lnη=A+k’ln|1-t/Tg|。     

煤矿机电设备的全面系统管理探析

叙述了煤矿机电设备管理中存在的问题,分析了改善煤矿机电设备管理的方式,提出了对煤矿机电设备全面管理的措施.     

Introduction of biochemical wastewater purification at OOO Mechel-Koks (stage I)

Systems for mechanical and biological wastewater purification have been introduced at OOOMechel-Koks. This represents the first stage of a two-stage project to introduce biochemical purification. Results obtained in the adjustment and debugging of the systems are presented.