富氧侧吹铜冶炼冰铜品位变化对杂质走向的影响

阐述了在铜冶炼工艺中,采用富氧侧吹炉进行铜冶炼造锍熔炼时,铜精矿中主要杂质元素砷、铅、锌在冰铜品位变化时的走向问题,通过对生产实践过中元素的跟踪,明确了不同冰铜品位时杂质元素在铜锍、炉渣、烟尘等所占的比例,分析了影响铜精矿杂质元素走向的影响因素,明确了铜精矿配比过程中,主要杂质元素的含量最合理的范围,对提高富氧侧吹炉生产实际操作具有指导意义。     

富氧侧吹处理含砷复杂金铜精矿的生产实践及技术优化

采用火法冶金技术处理含砷复杂金铜精矿主要有富氧底吹熔炼和富氧侧吹熔炼等技术.这两项技术氧势高,使得杂质更利于氧化脱除,但富氧底吹技术存在漏风量大、烟气中三氧化硫含量高、后续烟气无法直接喷水降温收砷等问题.本文从原料成分、工艺流程、主体设备及生产运行情况等方面对某企业采用富氧侧吹熔炼技术处理含砷复杂金铜精矿的生产实践进行...     

富氧侧吹熔炼-多枪顶吹吹炼炼铜工艺杂质元素行为

通过对富氧侧吹熔炼-多枪顶吹吹炼炼铜工艺过程的生产数据进行整理,计算得出了铁、锌、铅和砷在整个系统的分布率。通过XRD、SEM/EDS等测试手段,对冰铜、熔炼渣和吹炼渣等部分中间产物的物相组成和微观结构进行了表征。综合分析了主要杂质元素铁、锌、铅和砷在富氧侧吹熔炼-多枪顶吹吹炼炼铜工艺中的分布行为规律。结果表明,铁主要以铁橄榄石、铁酸锌、铁酸铜等形式分布于炉渣中,锌绝大部分也会造渣并以铁酸锌的形式进入炉渣,即大部分铁和锌能在炉渣中直接开路除去;而大部分铅和砷进入炉渣和烟尘中,可通过渣的形式及挥发机理脱除和回收,但还有相当数量的铅和砷会残留于粗铜中,只能在后续电解工序中脱除。总结了这几种杂质元素减量化控制的有效方法和途径,为铜冶炼过程中杂质元素的综合处理和稳定生产提供了参考。     

含锡物料富氧侧吹熔炼烟化炉烟化工艺研究

介绍了富氧侧吹熔炼烟化炉烟化处理含锡物料的冶炼工艺,与鼓风炉熔炼烟化炉烟化工艺做了对比分析。     

富氧侧吹熔池熔炼铜镍矿

介绍了富氧侧吹熔池熔炼工艺的特点,富氧侧吹炉的结构及生产实践.实践表明,富氧侧吹熔池熔炼铜镍矿具有流程短、能耗低、环境好等特点.     

富氧底吹造锍捕金工艺研究

采用富氧底吹造锍捕金工艺处理复杂含铜、高砷金精矿,以提高金、银的回收率,减少废水、废渣的排放。研究影响造锍熔炼过程中金、银走向和在冰铜中富集程度的因素,并调整造锍熔炼工艺指标,降低炉渣中有价元素的损失。     

国内冶金动态

<正>N2017064中国恩菲设计的烟台国润节能技术改造项目顺利投产中国恩菲设计的世界首个采用"富氧侧吹熔炼+多枪顶吹连续吹炼+火法阳极精炼工艺"项目烟台国润铜业有限公司节能技术改造项目一次性开车成功。该项目是世界上第一条"富氧侧吹熔炼+多枪顶吹连续吹炼+火法阳极精炼"热态三连炉生产线,熔炼系统采用富氧侧吹熔炼工艺,使用新型侧吹熔炼炉生产含铜大于68%的高品位铜锍,实现了侧吹熔炼技术的重大突破;吹炼系统采用多枪顶吹连续吹炼工艺,技术更先进、更可靠、更经济。本项目     

富氧侧吹直接炼铅烟气特性及净化除尘

以某公司铅冶炼项目工程设计为实例,着重介绍了“富氧侧吹氧化熔炼—富氧侧吹还原熔炼”生产工艺,并对富氧侧吹氧化炉出口烟气的特性进行了分析归纳,同时对其烟气净化除尘工艺的设计、设备选型、生产运行状况等进行了阐述和总结.      

富氧侧吹炉高浓度富氧低碳炼铜生产工艺

在铜冶炼生产中,富氧侧吹熔池炼炉是一种综合物料干燥、物料焙烧以及物料熔炼的炼铜生产工艺。在这种熔炼工艺投入生产之后,达到良好的生产效益。基于此,本文针对这种炼铜工艺展开研究,通过对工艺原理、富氧侧吹炉结构、生产流程以及注意事项的研究,强调工艺优势,推动工艺的广泛使用。     

侧吹熔炼铜渣的直流电贫化研究

使用小型交直流矿热电炉对富氧侧吹熔炼工艺产出的水淬铜渣进行贫化研究。结果表明,采用下负直流电贫化60min后渣含铜从0.73%降至0.28%,铜回收率约65%,比交流电提高约10个百分点。在1 160～1 350℃时熔渣温度对铜回收率影响不明显。黄铁矿精矿添加量为渣重10%时,渣含铜可降至0.24%,铜回收率约70%。渣含铜随冰铜品位的增高稍有增大的趋势。     

Characteristics of the sympathetic innervation of the nictitating membrane and of the vasculature of the nose and tongue of the cat

Vasomotor responses from the nasal mucosa and tongue, and contractions of the nictitating membrane, were recorded on stimulation of the cervical sympathetic or internal carotid nerves. Preganglionic sympathetic nerve fibres which elicited a membrane response possessed a lower threshold than those which evoked nasal vasoconstriction, while the latter displayed a lower threshold than fibres which evoked tongue vasoconstriction. The sympathetic vasodilator fibres to the tongue whose activity was revealed after alpha-receptor blockade, had a similar threshold to the vasoconstrictor fibres. Membrane contraction, nasal vasoconstriction and occasionally tongue vasoconstriction could be evoked by stimulating the internal carotid nerve. The postganglionic fibres innervating the nasal mucosa had a similar threshold to those of the nictitating membrane, which may indicate that there are small myelinated fibres innervating the mucosa. The preganglionic compound nerve action potential had four major components, S1-S4. S1, S2 and usually S3 fibres were associated with membrane contraction; S2, S3 and sometimes S1 fibres were associated with nasal vasoconstriction; and S3, usually S2 and occasionally S1 fibres were associated with vasoconstriction in the tongue. It is concluded that each of these three groups of nerve fibres, but not S4 fibres, may include fibres associated functionally with the three effectors. There was a considerable difference between the relative amplitude of the responses of the three effectors elicited by stimulation of the cervical sympathetic nerve at frequencies between 0.2 and 2 Hz. Vasoconstrictor responses were relatively larger than membrane contractions suggesting differences in the mechanisms of neurotransmission at the neuroeffector junctions.     

Kinematics of the pelvic girdle and the thoracic and lumbar segments in the course of the lateral inclinations and rotations of the spine

Physiological displacements of the trunk are the addition of these of the pelvic girdle and thoracic and lumbar spine segments. For a long time (3), this conjunction had been noticed but without numbered precisions. The purpose of this communication is to appreciate quantitatively, from a series of 16 subjects, the respective share of each components during lateral bending movements in the frontal plan and movements of rotation in the transverse plan. It results from this work that the pelvic girdle presents as reduced amplitude (4 degrees) in lateral bending on the other hand, displacement predominate to the level of thoracic spine (50 degrees). In rotation pelvic displacements are very important (30 degrees), while the spine so thoracic that lumbar has a weak participation (inferior to 5 degrees). Moderated abduction of hips increases by significant manner the motility of the pelvic girdle.     

Design and analysis of the tunnel connecting the beamcorridor and the spectrum hall of the CSNS

There is a tunnel connecting the beamcorridor and the target station in the spectrum hall in the CSNS project. The length of the tunnel is about 20 m. The shielding design of the tunnel is very significant for the persons working in the spectrum hall beca     

江西省降水集中期及其期间降水量的变化特征及趋势分析

根据江西省地方标准中有关降水集中期的定义,统计1971～2008年4～9月的降水集中期,并用季节性Kendall检验方法做趋势分析.结果表明,1971～2008年4～9月期间,6～8月是降水集中期及其期间雨量较多的月份,4、5、9月是降水集中期及其期间雨量较少的月份.随时间变化,全省6～8月降水集中期及其雨量呈可能增多趋势,4、5、9月呈可能下降趋势.     

优化焊缝金相组织 充分发挥石油用 ERW管的技术经济优势

P2ERW管代替无缝管,用于石油开采所用油管和套管的关键,是确保焊缝的高质量。它不仅需要具备先进的技术装备和完善的检测手段,更需要发挥金相检验对优化各项工艺参数的指导作用,才能从根本上掌握生产优质ERW石油用管的规律。     

谈投标报价策略和技巧

建筑企业参加投标竞争,目的在于得到对自己最有利的施工合同,从而获得尽可能多的盈利.为此,做出投标决策以后,必须仔细研究投标报价策略,并借助投标报价技巧,以达到既能中标又能赢利的目的.