基于Metcal的铜闪速熔炼-转炉吹炼工艺全流程模拟计算

以"闪速熔炼—PS转炉吹炼"铜冶炼主流工艺为设计计算对象,基于自主开发的"冶金工艺流程计算系统开发平台(Metcal)"软件,采用物料平衡、热平衡和化学平衡等原理建立各计算单元数学模型,并对铜冶炼全流程进行了设计模拟计算,得到了各冶金单元的详细物流信息和热平衡计算结果,为该工艺设计、放大提供了理论指导,提高了冶金工艺全流程设计计算效率。     

"碳足迹"计算方法初探

目前,温室效应已经成为国际社会面临的严峻挑战,为了应对这一严峻挑战,世界各国达成协议,发展低碳经济,创建低碳社会."碳足迹"是人类在大力发展低碳经济的大环境下应运而生的一个新概念,其计算方法关系到低碳经济的评价体系.为了计算"碳足迹",本文将研究区域内所有的碳主体分为能源消耗账户、土壤呼吸账户、生物资源账户,明确"碳足迹"的计算公式,确定各个账户下的CO2排放量,从量化评价指标入手,对"碳足迹"的计算方法进行初步的探索.     

基于Matlab的热加工图的数值构造方法

利用热加工图(Processing Map)可以分析材料在不同区域(不同的变形温度和应变速率)的高温变形机制,从而获得热加工"安全区"和"不安全区",达到控制组织演变、避免缺陷的产生和优化工艺参数的目的.Murty提出热加工图计算方法适用于复杂本构方程的材料,但其公式中含有积分项,计算过程复杂.Matlab具有强大的矩阵计算功能,本文给出了基于Matlab平台的计算过程和简易程序,可快捷得出计算结果.并绘制出材料的热加工图.     

用Excel计算烟道和空煤气管道的阻力

通过实例介绍了用Excel计算烟道和空煤气管道的阻力的方法.阻力计算中,集流三通或分流三通的直管、侧管的局部阻力系数有明显的差别.由于现有图表使用不便,本文建议用Excel的"插入菜单→图表→散点图→趋势线"的方式,使用现有的计算式编制了集流三通和分流三通的直管、侧管的局部阻力系数Excel表,编制了计算地下烟道、架空...     

高炉冷却壁及炉缸炉底工作状态在线监测

重点阐述高炉冷却壁及炉缸炉底在线监测系统各部分的特点、功能及应用效果。认为实时采集冷却水温和热电偶温度,选取合理的温度场计算模型,引入并完善"侵蚀及结厚诊断知识库",开发"正反问题"相结合的侵蚀计算方法,以提高模型的自适应能力,使计算结果和实际生产更加吻合,是实现高炉冷却壁及炉缸炉底在线监测的关键。     

基于"省公顷"的宁夏盐池县生态足迹动态分析

运用"省公顷"生态足迹模型对宁夏盐池县2008年的生态足迹进行计算.结果表明,宁夏盐池县处于生态赤字状态,基于"省公顷"分析的生态足迹计算得出2008年盐池县人均生态赤字高达1.6120hm2.生态足迹用地为耕地>建筑用地>草地>化石能源地>水域.在计算生态足迹的基础上对盐池县生态现状进行了综合分析,结果显示,人口增长快、居民消费方式不合理以及资源的利用率低是产生生态失衡的主要原因.     

矿山法地铁隧道二衬结构安全系数及可靠度计算方法研究

以北京地铁四号线某大断面矿山法隧道为背景,分别应用"初期支护与二次衬砌共同承受全部荷载的计算模式"与"不考虑初期支护承载而由二次衬砌单独承受全部荷载的计算模式"进行隧道截面安全系数和可靠度指标的计算,结果表明:两种承载模式得到的结构最不利截面安全系数均能满足要求,但"二衬结构单独承载模式"得到的最不利截面结构可靠度指标偏低.为确保根据不同承载模式得到的计算结果基本相同,在应用响应面法分析隧道衬砌结构荷载效应的基础上,采用了等效地层弹性抗力系数来表征初期支护对结构承载的贡献,为解决地铁隧道结构设计中由于结构承载模式不同而造成的计算结果差异提供了一个途径.     

浅谈CASS在金属露天矿采剥工程中的应用

露天矿利用现代测量技术及南方CASS成图软件计算采剥量,根据露天矿特点,选择适合露天的"方格网法"和"DTM法"进行比较分析,认为"DTM法"可作为矿山测量人员计算采剥量的首选方法。     

板坯加热炉最优加热制度研究

依据加热炉热平衡实验和"黑匣子"钢温测试实验,建立了大型板坯加热炉离线仿真计算模型,经过离线模型的仿真计算,实现了大型加热炉多段加热温度的优化,获得最佳加热制度,为加热炉的优化控制和操作、提高节能率及降低能耗提供了有效的指导。     

高炉炉缸炉底温度场及异常侵蚀在线监测诊断系统

分析了高炉炉缸炉底常用侵蚀监测方法的不足:一维传热、不含凝固潜热、不考虑异常情况对侵蚀影响的模型很难准确预测炉缸侧壁"象脚状"侵蚀的发生。建立了包含凝固潜热的三维非稳态柱坐标温度场计算模型,引入了"诊断知识库"实时判断和处理异常情况对侵蚀的影响,开发了炉缸炉底温度场及异常侵蚀在线监测诊断系统,成功应用于首钢、迁钢、唐钢、攀钢、长钢等多座高炉。介绍了该系统的侵蚀计算流程、程序设计特点、具体模块功能和在高炉生产中的指导作用。模型计算结果的准确性在高炉大修破损调研时得到了充分的验证。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.