创新泛亚——以稀有成就富有

正2011年4月21日,泛亚有色金属交易所正式开市交易。目前,已上市品种包括铟、锗、钨、铋、镓、钴、白银、钒、锑、碲、硒等11个品种,其中铟、锗、钨、铋、镓等品种的交易量、交收量、库存量均为全球第一。小金属大作用稀有金属是国民经济发展的重要基础材料,铟、锗、钨、铋、镓、钴等稀有金属,被称为电子金属,生命攸关金属,     

出版物上数字的用法(GB/T 15835—2011)

在使用数字进行计量、编号的场合,为达到醒目、易于辨识的效果,应采用阿拉伯数字;当数字伴随有计量单位时,如:长度、容积、面积、体积、质量、温度、音量、频率等,特别是当计量单位以字母表达时,应采用阿拉伯数字。现代生活中出现的事物、现象、事件,其名称的书写     

30～50岁男性前列腺体积与体重指数、血压、血脂及血糖的相关性分析

目的:了解30～50岁男性前列腺体积与体重指数、血压、血脂及血糖的相关性.方法:从石景山区社会保险中心登记信息中随机抽取1 010名30～50岁男性作为研究对象,行体格检查并计算体重指数(body mass index,BMI),经腹B超测定并计算前列腺体积(prostate volume,PV);空腹抽血检测血糖(blood glucose,BG)、血胆固醇(blood cholesterol,CHOL)、甘油三酯(triglyceride,TG)、低密度脂蛋白(low density lipoprotein,LDL)、高密度脂蛋白(high density lipoprotein,HDL)等,测量血压(blood pressure,BP),应用SPSS13.0统计软件对PV和BMI、BP、BG、CHOL、TG、LDL、HDL的相关性进行统计学分析.结果:符合标准并资料全面者1002人,前列腺体积与年龄、BMI、BG、CHOL、LDL、HDL等因素有明显的相关性,P值分别为0.000、0.013、0.032、0.040、0.032、0.017,相关系数r值分别为0.62、0.57、0.52、0.51、-0.50、-0.48.与TG、收缩压(systolic pressure,SP)、舒张压(diastolic pressure,DP)无明显相关性,P值分别为0.313、0.213、0.782.调整年龄因素后,PV与BMI、LDL仍有较强的相关性,P值分别为0.029、0.001,相关系数r值分别为0.53、-0.49.与BG、CHOL、LDL、HDL、TG、SP、DP无明显相关性(P＞0.05).结论:在30～50岁男性人群中,前列腺体积和BMI及血脂异常明显相关,BMI、血脂异常是前列腺体积增大的危险因素.     

国家拟出台严厉措施淘汰落后产能

国家拟出台进一步加强淘汰落后产能工作的通知,协调发改委、工信部、环保部、国土部、商务部、海关总署、财政部、央行、银监会、质检总局、安监总局、工商总局、电监会、能源局等,以严厉措施,重点完成电力、煤炭、钢铁、水泥、有色、焦炭、造纸、皮革、     

方铅矿单矿物中各元素的测定

有色金属单矿物中各元素分析,一直受样品重量所控制,挑选一种单矿物的矿物,需耗费相当的时间,为了节省样品称样数量,提高分析速度,结合实际工作需要,拟定了三种分析流程,取样600mg,测定21种元素,满足了方铅矿单矿物的分析。 一、分析流程 1.火焰原子吸收法分析铜、铅、锌、钴、镍、镉、银、铁、锰、钙和镁等。 2.经过富集和分离后用原子吸收法测定锗、镓、铟、铊、和吸光度法测定硒、碲。     

中国有色（沈阳）冶金机械有限公司

中国有色（沈阳）冶金机械有限公司是我国机械工业和重型骨干企业,隶属于中国有色矿业集团有限公司,具有60余年的历史,有员工3400名,其中工程技术人员385名,具有铸钢、铸铁、铸铜、焊接、锻造、热处理、机械加工等机械制造实力;拥有完善的理化测试手段和科研、设计、制造、配套、安装、调试等综合能力;长期致力于矿山、冶金设备的研制、开发和制造,是机械制造业的核心企业,为钢铁冶金、有色冶金、化工、电力、建材、水泥等工业提供各种专用与非标设备与备件。     

工信部:“十二五”期间加快淘汰有色等行业落后产能

2月27日,工信部发布《工业节能"十二五"规划》(下简称"规划"),将在钢铁、有色金属、石化、化工、建材、轻工、纺织等行业,大力推进结构节能。"十二五"期间,将加快淘汰炼铁、炼钢、焦炭、铁合金、电石、电解铝、铜冶炼、铅冶炼、锌冶炼、平板玻璃、化纤、铅酸蓄电池等工业行业落后产能,促进产业结构调整和技术进步。     

电感耦合等离子体原子发射光谱法测定高碳除尘灰中11种元素

实验重点探讨了高含量碳对除尘灰样品中镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌等元素测定的影响,并解决了除碳的问题。样品使用马弗炉高温除碳,采用盐酸-硝酸-氢氟酸-高氯酸消解样品灰分,选择了镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌等元素的分析谱线和扣背景模式,建立了使用电感耦合等离子体原子发射光谱法(ICP-AES)测定高碳除尘灰中镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌等元素的方法。在仪器最佳工作条件下,各元素校准曲线线性相关系数r均大于0.999 5,方法检出限在1.08～26.01 mg/kg之间。方法应用于除尘灰实际样品中镁、铝、钾、钙、铬、锰、铜、钡、铅、镉、锌的测定,结果的相对标准偏差(RSD,n=11)为0.90%～7.1%,目标元素的加标回收率为90%～117%;按照实验方法测定除尘灰中镁、铝、钾、钙、锌,结果与火焰原子吸收光谱法(FAAS)的测定结果相吻合。     

从铅浮渣反射炉烟尘提取铟的生产实践

采用二段浸出、萃取、酸洗、反萃、置换、压团,熔铸、电解铸型新工艺,能成功地从铅浮渣反射炉烟尘中提取铟,该工艺简单、技术可靠,具有投资省、铟总回收率高、铟锭产品质量高等特点.     

沁阳市沁龙化学防腐有限公司

河南省沁阳市沁龙化学防腐有限公司是从事研制生产多功能新型螺旋溜槽、摇床、旋流分级机、磁选机、浮选机、搅拌槽、打砂机、玻璃钢冷却塔、风机、管道、防腐贮罐等多种产品的专业公司,已有近三十年的生产历史,通过了lS09001:2000质量体系认证,主导产品为多功能新型螺旋溜槽、摇床,是选别有色金属、黑色金属、非金属、贵重金属的理想选矿设备,如金矿、银矿、沙金矿、锅矿、钛铁矿、硫铁矿、赤铁矿、褐铁矿、铬铁矿、钨矿、钽泥矿、煤矿、独居石、蓝宝石、重晶石、金红石、锆英石、硅砂等。现有8000多台设备在全国各地矿山使     

马钢4 000 m3高炉炉前设备自动化改造实践及思考

介绍了马钢A高炉(4 000 m3)的炉前设备自动化改造的过程及效果,并从智能化炉前作业方面进行探讨分析。改造实现了炉前三机的HMI手动+操作台手动+遥控功能,极大改善了操作环境,操作更加便捷和安全,并达到了炉前操作减员增效、泥炮的“一键式堵口”、铁口数据库模块化的改造效果。改造后的马钢A高炉,炉前设备自动化、智能化仍有提升空间,可从泥泡自动加泥、开铁口机自动换钎、摆动流槽自动切换3方面入手,提升工作流程的稳定性。目前,出铁场主要生产设备已基本实现远程操作和一键操作,智能化炉前作业已成为炼铁发展的重要方向。     

烧结余热锅炉并联发电系统模型与调控方法

 针对烧结余热发电系统运行稳定性差及停机率较高的问题,基于概率理论建立了多台烧结余热锅炉并联运行发电系统数学模型,分析了余热锅炉工作状态对余热发电系统稳定运行的影响,提出了烧结余热锅炉与发电系统稳定运行方案和蒸汽量调控策略。现场数据表明,多台余热锅炉并联运行,发电机组运行稳定性改善;4台余热锅炉并联共用1台发电机组的烧结余热发电系统,3台及以上余热锅炉正常工作,即可保证系统稳定运行概率大于0.98;当系统蒸汽量不足时,通过管网调入蒸汽,发电系统稳定运行概率可达到0.96以上。     

湘钢4~#高炉大修开炉达产实践

对湘钢4#1 800 m3高炉开炉生产实践进行了总结,通过前期详细的开炉前准备和精心的开炉操作,做到了安全高效科学有序地开炉,于送风后24 h出第一次铁,渣铁物理热充沛,流动性良好,取得开炉第五天达产(利用系数达2.2),第二月燃料比降至515 kg/t的效果。     

Thrombogenic cause of low extremity veins in patients undergoing pelvic operation

Postoperative fatal pulmonary embolism caused thrombi from low extremity deep veins of patients after abdominal operation remains a major cause of death. Blood biorheology in 34 patients having pelvic operation and 41 patients having non-pelvic operation was studied. Blood viscosity was significantly higher in pelvic operation than in non-pelvic operation. The low extremity venous blood viscosity was significantly higher than the upper extremity venous blood viscosity. These suggest that hyperviscosity status and hypercogulable of low extremity veins may be an important cause that deep venous thrombogensis occurs prone to the low extremities in patients with pelvic operation.     

基于熵的钢铁制造流程运行有序性评价模型

钢铁制造流程运行有序性的定量评价,是钢铁制造过程优化管控中的一个重要问题.为从流程中工序/装置之间的衔接、匹配状态方面定量研究流程运行有序性,结合信息熵的概念,定义钢铁制造流程中单元装置i输入端和输出端的平均不确定性为其运行状态熵E(i),以运行状态熵与最大运行状态熵的比值E(i)/Emax(i)为其运行无序度,相应地...     

The metabolic response to operative stress in infants

The aim of this study was to characterize energy metabolism and substrate utilization in infants following an operation. Nineteen infants (weight 3.2 +/- 0.2 kg) who had an operation were studied. Anesthesia was standardized and operative stress score (OSS) was recorded. Five infants had a minor operation (OSS < 7), and 14 infants had a major operation (OSS > or = 7). Energy and nitrogen intake were constant during the 48-hour study period. Respiratory gas exchange was measured by indirect calorimetry preoperatively, and postoperatively for the first 12 hours continuously and at 24 hours, 48 hours, and 5 days. Urinary nitrogen excretion rate was measured for the first 48 hours following the operation. Physical activity was scored. Resting energy expenditure (REE) and nonprotein respiratory quotient (NPRQ) were calculated. REE increased postoperatively, peaking at 2 to 4 hours, and returned to baseline levels by 12 to 24 hours. Peak REE was significantly higher than baseline REE (P < .001). Substrate utilization was not altered by operation. The increase in REE was significantly greater in infants having a major operation than in infants having a minor operation (P < .05). Among infants having a major operation, the increase in REE was significantly greater in those infants more than 48 hours old, than in those infants less than 48 hours old (P < .05).(ABSTRACT TRUNCATED AT 250 WORDS)     

武钢5号高炉专家系统在布料状态评估中的应用

高炉布料调剂对于维持高炉的稳定顺行具有决定性的意义。武汉钢铁(集团)公司新开发的5号高炉专家系统利用数学模型实现了高炉布料调剂的自动处理,通过利用数学模型处理高炉操作数据,如炉顶煤气温度、炉顶煤气成分、压差、冷却壁温度变化等,可以获得对气流分布状况、炉型变化状况及高炉运行状况的评估结果;结合高炉当前的运行状况,如焦比、风量、炉身静压力、原料状况(组成、粒度、热性能等)等就可以获得调剂的建议。高炉冶炼专家系统投入运行后,有效指导了高炉的布料调剂,高炉操作稳定,工艺指标得到改善。     

八钢A高炉低品位低钛矿强化冶炼生产实践

八钢A高炉使用低价疆内原燃料资源冶炼,通过对高炉操作制度及关键操作参数的选择,以及几年的生产实践,指出八钢A高炉在低成本原燃料的条件下,采用适当的高炉操作制度及控制关键操作参数,强化炉外管理,高炉也能达到稳定、顺行,改善技术经济指标,降低吨铁成本的目的。     

Cutaneous myiasis in a traveller returning from Africa

In order to prevent tendon adhesion following operation, autogenous great saphenous vein graft was used to reconstruct the tendon sheath. The operation was performed under microsurgical technique. This method was used to repair 23 tendons and 17 tendon sheaths. The early functional exercises were carried out after operation. Follow up from 10 months to 4 years, the prognosis was good except in 3 fingers, in which, the wounds were infected resulting the necrosis of the grafted veins and exposure of the repaired tendons. The details of the operation were introduced. It was emphasized that non-traumatic handling of the tissues was essential in preventing tendon from adhesion.     

Doppler ultrasonography in successful varicocele surgery

The authors examined 47 patients after operation on account of varicocele by colour flow mapping and Doppler frequency analysis. In addition they evaluated the postoperative finding clinically and examined also the spermiogram. The greatest success of surgical treatment was observed after laparoscopic ligature of the v. spermatica--a success rate of 91% was recorded after this operation. Bernardi's operation was successful in 62%, Paloma's in 56% of the patients. From 18 patients with a pathological spermiogram before operation they observed improvement in 25%.