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for reverse flotation of bauxite YU Xin-yang1, 2, ZHONG Hong1, LIU Guang-yi1, SU Xiao-ming1 (1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2... analyzing methods. The results indicate that QAS222 is an effective collector in the reverse flotation of bauxite; efficient separations of the mixture at different mass ratios of Al2O3 to SiO2 can......
基于逆向工程与SLS技术的环氧树脂模具制造研究 任东风1,王鹏程1,云雪蜂1,左堂海1,田芳1 (1.内蒙古工业大学,材料科学与工程学院,内蒙古,呼和浩特,010051;2.中国航天科工集团,第六研究院41所,内蒙古,呼和浩特,010010;3.华中科技大学,材料科学与工程学院,湖北,武汉,430074) 摘要:研究以摩托车后视镜为初始模型,利用逆向工程和SLS快速成型技术制造环氧树脂快速模具的方法.详细叙述从模型数据采集,CAD建模,母模的制造,环氧树脂模具的制造直到产品试制的整个实验过程,证实这种基于逆向工程和SLS快速原型制造技术的环氧树脂模具制造过程及思路的可行性和优越性. 关键词:逆向工程; SLS; 环氧树脂模具; Imageware; reverse engineering; SLS; epoxy mould; Imageware; [全文内容正在添加中] ......
; 文献标志码:A 文章编号:1672-7207(2019)05-1135-09 Research on reverse rotation angle calculation method of vector form...: In order to improve the calculation efficiency of vector form intrinsic finite element (VFIFE), the side-angle-method for calculation of the reverse rotation angle of the triangular plane solid......
minerals; Gemini cationic surfactants; reverse flotation; adsorption mechanism 1 Introduction For diaspore-bauxites in China, reverse flotation has been proved to be an efficient and economic method to obtain high grade bauxites (Al2O3-to-SiO2 mass ratio greater than 8 [1-4]. The gangue minerals in Chinese diasporic bauxites are mainly kaolinite, pyrophyllite and illite, and the purpose of the reverse......
18Mn TRIP钢温变形过程中马氏体逆相变行为鲁法云1,杨平1,孟利1,毛卫民1(1.北京市北京科技大学材料科学与工程学院)摘 要:通过相变点测定,相图计算,组织观察,XRD分析及EBSD取向成像技术研究了室温下含两种马氏体及奥氏体的18Mn钢在100-500℃间进行温变形时的组织,相结构变化及马氏体逆相变行为.结果表明,在300℃以上压缩变形时,TRIP效应消失,马氏体减少,出现逆相变;形变加速了扩散型逆相变,bcc马氏体或铁素体以扩散方式转变成奥氏体,奥氏体不需要重新形核;形变使奥氏体出现机械稳定化并出现......
of the other optimization algorithms. Key words: genetic particle swarm optimization; closed-loop supply chain; remanufacturing; network design; reverse logistics 1 Introduction From the perspective of product life cycle, closed-loop supply chain is a closed-loop system in logistics, capital and information flow as an integration of both the forward and reverse supply chains [1-3]. For the closed-loop......
铜电解周期反向整流电源的探索与实践王卓1,王强2,王维泉2(1.吉林省吉林市北华大学电气信息工程学院2.北华大学 信息技术学院,吉林 132021)摘 要:设计周期反向铜电解整流电源的主电路及其控制电路.现场运行实践证明,采用周期反向电解电源,可提高电解电流密度,又能减少阳极纯化,特别是高杂质的阳极板效果更好.实现了节能,降低成本,保质增产,具有实用价值.关键词:冶金技术; 铜电解; 周期反向; 整流电源; PLC控制......
变形温度与冷却速率对含Nb中碳钢晶粒细化的影响赵英利1,2,时捷2,董瀚2,谢刚-1(1.云南省昆明市昆明理工大学材料与冶金工程学院2.北京市钢铁研究总院结构材料研究所)摘 要:利用Gleeble-1500热模拟试验机,以含Nb中碳钢为研究对象,研究了不同变形温度与冷却速率对再加热淬火后奥氏体晶粒细化的影响及其晶粒细化的机制.结果表明:经热变形后直接淬火+再加热淬火工艺得到的奥氏体晶粒尺寸均小于10μm,且随热变形温度的降低,原奥氏体晶粒由等轴晶粒变成扁平化晶粒,经再加热淬火后,得到的奥氏体晶粒逐渐细化;与变形......
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should be treated before re-use or discharge. The paper also highlights treatment by reverse osmosis (one of the few methods able to generally remove dissolved components), particularly showing...; bioleaching; tailings; refractory gold; arsenic; controlled low strength materials; reverse osmosis  ......