重介质选煤技术管理实践与应用

重介质选煤技术是目前我国选煤厂运用最广泛的选煤技术之一。结合霍州煤电集团吕梁山煤电有限公司选煤厂的生产实践存在的问题,介绍了选煤厂生产管理的几项措施和实施效果,取得了良好的经济效益。     

重介质分选旋流器的研究现状和发展

介绍了重介质选煤及重介质分选机的发展应用,重点说明了无压给料三产品重介质旋流器的原理、结构、工艺特点以及在选煤厂的推广应用效果,展望了该项技术发展应用的广阔前景。     

两产品重介旋流器主再选改造

东欢坨动力煤选煤厂由美国塞吉满公司设计,采用先进的模块化设计理念,空间小,设备紧凑,主要洗选工艺为两段两产品重介旋流器串联主再选。2012年底选煤厂针对生产实际,对原设计的串联主再选旋流器系统重新设计和改造,使两段两产品重介旋流器并行运转,提高了原煤入洗量和气精煤产量,取得了较好的效果。     

降低选煤介质消耗 提高煤厂经济效益

一、概述钱营孜选煤厂设计能力为240万吨/年,是炼焦配煤与动力煤兼顾的双系统选煤厂,2009年10月开始运营生产。工艺流程为:300～50mm块煤动筛分选,50～0(6)mm有压两产品重介旋流器主再选,粗粒煤泥RC煤泥分选机分选,细煤泥浮选,浮选精煤加压过滤机回收,浮选尾煤压滤机回收。2011年1~4月份,洗选平均介耗达4.2kg/t,远超过设计指标2.5kg/t。本文针对如何降低介耗这个课题开展研讨。     

重介悬浮液密度自动控制系统的分析

本文介绍了潘三矿选煤厂重介质密度自控系统的构成和工作原理,总结了该系统设计的特点,并分析了该系统在实际运行中存在的问题,提出了改进的措施。     

跳汰选煤和重介质选煤方法对比分析

本文介绍了目前主要的选煤方法：跳汰选煤和重介质选煤的发展现状及采用工艺及其主要优缺点,并针对不同选煤厂提出了采用重介质选煤工艺时应选择的工艺类型。     

选煤厂重介质密度调节系统的改造

通过对过去重介质密度调节系统存在精度不高、调节滞后、磨损严重等问题进行分析 ,介绍了新型重介质密度自动调节系统的原理、结构、特点及其在选煤厂的应用。     

浅谈大地选煤厂分选粒级及选煤方法的确定

根据霍州煤电集团大地煤业有限公司矿井选煤厂的煤源及煤质,确定其选煤厂的分选粒级及选煤方法为：200mm～50mm原煤采用重介浅槽分选机分选,50mm～1mm原煤采用重介旋流器分选,1mm～0.25mm原煤采用TBS粗煤泥分选机分选,-0.25mm煤泥采用加压过滤机脱水回收。     

选煤厂技术改造总体方案构想

针对屯兰矿选煤厂现行问题，对选煤工艺改造方案，即三产品重介工艺、毛煤动筛排矸、浮选精煤加压过滤机回收改造进行了可行性分析。     

改造工艺流程 提高浮选效率

任楼煤矿选煤厂属矿井型选煤厂,原设计年入洗原煤150万吨,为配套任楼煤矿生产发展需要,经改造后,现入洗能力达到200万吨,年。选煤方法采用跳汰主选、中煤重介再选、煤泥浓缩浮选、尾煤压滤回收联合流程。     

某企业转炉氧枪修理车间工艺设计探讨

介绍了某企业转炉炼钢氧枪维修间的工艺、设备选型、车间布置和能源介质消耗等,并总结了该氧枪维修间工艺设计特点。     

Solvent Extraction in Hydrometallurgy： Present and Future

Introduction Solvent extraction as applied to refining operations, particularly uranium, commenced in the late 1940s. These plants were small by present plant sizes. Shortly after, and almost 50 years ago now, the first solvent extraction plant was installed to treat hydrometallurgi-cal solutions at the mine site for the recovery of ura-nium. The success in this first generation of uranium operations in the 1950s and 1960s eventually led to the application of solvent extraction to copper opera…     

强激光在固体介质中的爆轰破坏机理

本文采用圆柱轴对称模型研究了强激光在固体透明介质内部产生爆轰破坏的机理,并进行了实验验证.     

Nuclear Minerals Plants in Brazil——Case Studies

Introduction The nuclear industry of Brazil—INB (Indústrias Nu-cleares do Brasil), a mixed economy Brazilian com-pany connected with the Comiss?o Nacional de Ener-gia Nuclear (CNEN) under the authority of the Minis-try of Science and Technology is activ…     

Plant Community Characteristics of Trampling Disturbance Kobresia humilis Community along the Road in Naqu, Tibet

0IntroductionAs an i mportant symbol and contents ofecosystem regression and reconstruction,plant community characteristics play a very i mpor-tant role[1].Human projects including the Qing-Zang road,Qing-Zang railway and degeneratingtundra affect the weak grassland ecosystem greatlyat high altitude[2],which influenced the ecologicalprocess not only to this district by changing thestructure and function of grassland ecosystem[3,4];eventoit’s adjacent region’s[5,6].So,it is helpfulto accele…     

The active commissioning process for a power reactor spent fuel reprocessing pilot plant in China

The process of a power reactor spent fuel reprocessing pilot plant (hereinafter referred to as the "pilot plant") had been completed through active commissioning. Operational and technological parameters, such as shearing, dissolution, feed clarification, co-decontamination cycle, uranium and plutonium purification cycle, and the uranium and plutonium finishing facility, were identified. In addition, technical devices including extraction and mechanical equipment, electrical installation as well as instrumentation, and auxiliary systems for safety and adaptability were also verified. The commissioning results indicated that the recovery rate and decontamination coefficients of each system satisfied the designed index requirements and the qualified productions, i.e. uranium trioxide and plutonium dioxide, were produced. Monitored values at various monitoring points in the radiological protection system were within the control range and the discharge of waste water and waste gas complied with the relevant standards. This shows that independent and innovative technology for power reactor spent fuel reprocessing had been developed by our country.     

电厂用中水深度处理技术探讨

阐述了中水回用的意义,介绍了火力发电厂采用城市中水作为补水的各种处理技术,并针对具体案例的工艺设计做出可行性分析,旨在推动中水深度处理技术在工业上更好地应用。     

濒危植物四合木（Tetraena mongolica Maxim.）悬浮培养下体细胞胚胎发生

将四合木（Tetraena mongolicaMaxim.）外植体诱导产生的愈伤组织进行细胞悬浮培养。通过实验在MS培养基附加2,4－D0.1mg/L,6-BA0.25mg/L,水解酪蛋白500mgL的液体培养基中培养,经120～150r/min摇床振荡分散建立细胞悬浮系,直到体细胞胚胎产生后转至无激素的固体培养基中产生再生植株。结果表明：四合木悬浮培养条件下可以得到胚状体,并形成试管苗。     

大花君子兰单细胞培养再生绿色植株

以大花君子兰（ｃｌｉｖｉａ ｍｉｎｉａｔａ） 瘤状结构的胚性愈伤组织为单细胞培养来源,在附加２ ｍｇ／ＬＫＴ、１ｍｇ／Ｌ２ ,４ —Ｄ 及３ ％ 蔗糖的ＭＳ基本培养基上培养,诱导出的愈伤组织经同一诱导培养基长期继代培养后形成幼苗,将较大的幼苗转入状苗生根培养基（ 附加０－５ ｍｇ／ＬＫＴ 和０－１ｍｇ／ＬＮＡＡ的１／２ ＭＳ培养基） 上继代培养形成再生绿色植株。绿苗再生频率随继代时间的延长而提高。     

两个表格在配制植物组织培养基中的应用

按照传统方法配制植物组织培养基时,需要花时间进行一系列的计算。采用“培养基配伍表”和“不同体积的培养基添加不同浓度的组分的取用量”两个表格配制培养基,既减少了大量的计算工作,又避免了在配制培养基过程中容易出现的差错。