天马山矿石金、砷、硫的选矿分离回收工艺试验研究

天马山矿矿石属含砷高硫难选金矿石，对该矿石进行了选矿工艺试验研究，采用优先浮选金、次氯酸钙作氧化剂氧化浮选分离黄铁矿和毒砂、磁选分离磁黄铁矿和毒砂工艺流程，综合回收金、硫、砷，取得了较好的选别指标。此工艺比较适合天马山矿石性质和该矿实际生产情况。     

甘肃某含砷金精矿降砷选矿试验研究

针对甘肃某金精矿含砷(12.44%)高的特点,进行了金、砷分离选矿试验研究。通过试验探索,确定采用抑硫浮砷工艺流程,即金精矿细磨后采用石灰为抑制剂、硫酸铜为活化剂进行浮选毒砂抑制黄铁矿。其结果表明:抑硫浮砷工艺流程较好地解决了金精矿含砷高的问题,且浮选闭路试验获得了较好的分离效果,金精矿金品位33.65 g/t、含砷1.19%,金作业回收率91.48%。     

复杂卡林型金矿选冶联合工艺的研究与探索

某低品位超大型难处理金矿属于卡林型金矿,金品位偏低,矿石难选,采用常规的选矿工艺及预氧化技术处理,综合经济效益不理想.某研究院对该原料在实验室开展了工艺矿物学研究及浮选、直接氰化浸出、焙烧-氰化浸出、生物预氧化-氰化浸出等探索性试验,试验结果表明,采用抑砷浮硫技术不能实现该矿的硫砷分离,原因是毒砂粒度过细,且毒砂与黄铁...     

毒砂和黄铁矿的浮选分离研究现状及趋势

毒砂和黄铁矿的浮选分离是硫化矿分选中比较有代表性的,存在一定的难度。就目前的研究内容看,分选毒砂和黄铁矿的主要方案为抑砷浮硫,采用氧化剂法分选毒砂和硫化矿是主要的研究方向,组合调整剂和有机抑制剂法也逐渐被研究者重视。     

硫化铜与含钴黄铁矿低碱度分离新工艺研究

针对海南某铜钴硫矿床,通过对其进行工艺矿物学研究查清其有用矿物的赋存状态和嵌布特征,并依此确定其最终的选矿工艺流程和药剂制度。研究表明,原矿中的钴矿物主要以晶格取代的形式赋存于黄铁矿和毒砂之中,试验针对其工艺矿物学特性采用铜钴硫混合浮选流程,混合精矿再分离得到铜精矿和硫精矿,其中钴矿物大部分进入硫精矿之中,实现了对有价金属最大限度的回收。铜硫分离使用石灰+SH组合抑制剂,SH可部分替代石灰实现在较低碱度条件下对黄铁矿的抑制作用。     

陕西某糜棱岩型贫硫金矿选矿工艺优化设计

陕西某金矿属于脉石矿物复杂、含碳量高的糜棱岩型贫硫金矿。主要矿石矿物有自然金、黄铁矿、毒砂和磁黄铁矿,主要脉石矿物为绢云母、石英、碳质、碳酸盐和黑云母。选矿试验研究结果表明,采用浮选工艺、重选工艺及重-浮联合工艺均能实现金回收率80%的选矿指标。在工艺矿物学研究和选矿试验研究的基础上,结合国内类似矿山生产实践和研究成果,对选矿工艺流程进行了优化设计,采用尼尔森粗选扫选-摇床精矿的短流程重选工艺。优化改造投产后达到了设计指标,金回收率比原工艺提高10%~15%。     

黄铁矿—毒砂浮选分离的研究

毒砂常与黄铁矿共生,在一些黄铁矿中还往往存在有类质同象或呈细包裹体的砷,这造成一些矿山生产的黄铁矿含砷较高。在制酸时,砷的挥发和腐蚀作用毒害人体并腐蚀设备。因而,化工部门对硫精矿含砷量要求是相当严格的,致使目前很多矿山生产的黄铁矿因含砷高而得不到利用。所以,进行黄铁降砷,即硫—砷的分     

内蒙某矿业铜铅锌多金属矿金、银的嵌存状态

该矿床是受断裂构造控制的中温热液矿床。经详细的光、薄片鉴定,认为该矿床矿石组成比较复杂,主要为磁黄铁矿、方铅矿、闪锌矿、毒砂、黄铁矿、银黝铜矿和黄铜矿等,其次还有脆硫锑铅矿、辉银矿、金银矿、脆银矿和辉锑银矿等。对该铜铅锌多金属矿进行了工艺矿物学研究,重点查明伴生金银的赋存状态、嵌布粒度等工艺特征。为确定合理的选矿工艺流程及条件提供依据。     

锑金砷多金属硫化矿的浮选分离

对含有辉锑矿、自然金、黄铁矿、毒砂等多金属硫化矿矿石混合浮选后,粗精矿用碳酸钠调节矿浆PH值至11左右、添加硫化钠作辉锑矿抑制剂,浮选金砷硫,可获得金砷和锑两种合格精矿。     

金矿金硫砷浮选分离技术研究

在金矿中,金、硫、砷相互嵌合,如果提取工艺不当,很难提高金矿的开采率,而浮选分离技术能够提高金的富集率,但它也受到相关因素的限制。对于含砷金矿来说,它具有一定的特点:成分复杂、砷含量过高、砷硫分离困难等,均对金矿中金的提取造成了很大的困难。金是一种稳定的物质,很难与其他物质发生反应,这也是金矿提取困难的根本原因。本文主要对金的概述、金矿石选矿的现状进行分析,进一步研究金硫砷浮选分离技术。     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。     

材料科学技术转型发展与钢铁创新基础设施的建设

摘要：在第4次工业革命浪潮的推动下,钢铁科学与技术正在经历数字化、智能化转型。钢铁行业全流程各工序均为“黑箱”,为多场、多相、多变的巨系统,具有复杂相关关系和遗传效应等。这些不确定性带来了巨大的挑战。挑战和机遇并存。这些不确定性提供了智能化和数字化技术的应用场景资源;钢铁行业极为丰富的大数据提供了挖掘其中蕴含客观规律的数据资源;现代的数据科学、智能技术为解决不确定性问题提供了强大的手段。以数据为中心,以工业互联网为载体,以实验工具、数字数据、计算工具为支撑,建设钢铁企业材料创新基础设施,将可以大幅度提高研发效率,降低研发成本,有力地支撑钢铁材料科学与技术的转型发展。实验工具平台除了传统的实验室仪器装备和中试装备之外,实际生产线被作为主要的实验工具。这些实验工具提供丰富、精准、写实的历史数据和现实生产数据,特别是生产线装备提供实际生产大数据,蕴含着生产过程中的全部规律,是极宝贵的数据资源。利用机器学习、深度学习等现代数据挖掘技术为计算工具,对这些数据资源进行处理、分析、计算,将数据转换为高保真度模型,可以得到具有“原位分析能力”的数字孪生。在工业互联网的总体架构下,以数字孪生为核心,组成信息物理系统,构建起基于数据自动流动的状态感知、实时分析、科学决策、精准执行的闭环赋能体系,解决生产制造、应用服务过程中的复杂性和不确定性问题,提高资源配置效率,实现资源优化,对材料行业转型发展提供关键技术支撑。虚实映射、实时交互、精准控制的信息物理系统与材料创新基础设施合二为一,以材料创新基础设施为基盘,形成具有“原位分析能力”的数字孪生,建设钢铁生产全流程、一体化的信息物理系统,必将推进钢铁行业智能制造蓬勃开展和数字化、智能化转型。     

Status and solidarity in social comparison: Agentic and communal values and vertical and horizontal directions.

Social comparison involves positioning the self relative to others on a vertical or status dimension (ranging from upward to downward comparisons) and a horizontal or solidarity dimension (ranging from contrastive to connective comparisons). Across 3 studies in which 389 undergraduates recorded everyday social comparisons (n = 4,417), downward and connective comparisons were rated as more helpful and mood enhancing than upward and contrastive comparisons. The effects of horizontal comparisons were greater for people for whom solidarity was an important value; however, the effects of vertical comparisons were not greater for people who valued status. The roles of the comparison target, topic, and situation were also explored; for example, noticing undesirable features of the target enhanced status but undermined solidarity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Praise and Blame and Robinson.

Daniel Robinson suggests that much of the civil and criminal law "serves as the institutionalized form of praise and blame". Indeed it does. Pulling at this thread of Robinson's tapestry leads the reader straightaway to a host of truths about how law and morality not only intersect, but work together in harmony. "[L]aw", Robinson says, is a "vivid expression of deeper and impenetrably complex moral theories". This essay explores several of these harmonies, but focuses on two. One is that political society must be seen as the cooperation of free persons according to law, which persons hold common moral understandings. The second has to do with retribution as the moral justifying aim of punishing criminals. The author goes beyond Robinson's limited praise of retribution, and shows that some central features of our practice of punishment are understandable only within the retributive framework. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

钢铁产品交易与展示平台的设计与应用

为解决单个企业的信息化投资风险、从整体上降低企业信息化投入,针对大邱庄钢铁产业的类型特点,设计了一种新型信息化公共服务平台。详细阐述了钢铁产品展示及交易平台的建设内容及系统开发技术。该平台集产品展示、信息查询、用户管理功能于一体,实现了全自动、全智能的在线管理和维护,适用于中小型企业。该平台的应用最大化地发挥了大邱庄的产业优势,对大邱庄工业园区的宣传和市场开拓起到了一定的作用。     

Aging and negative affect: The rise and fall and rise of anxiety and depression symptoms.

The relationship between aging and negative affect is dynamic and complex. Although prior studies have often cited lower prevalence rates of anxiety and mood disorders among older individuals, these studies may miss the dynamic relationship between symptoms and aging. To evaluate a nonlinear model of the relationship between aging and negative affect, the author examined measures of neuroticism, anxiety, and depression symptoms in a cross-sectional, community sample (N = 335), ages 18 to 93. Results indicated a curvilinear relationship, with mean symptom levels increasing during early adulthood (until the mid-30s) and then showing a small decline until older adulthood (the mid-70s), when symptoms again increase with age. (PsycINFO Database Record (c) 2010 APA, all rights reserved)