特钢作业粉尘危害程度分级调查

根据国家标准《生产性粉尘作业危害程度分级》（ＧＢ５８１７－８６），对２７９个特钢作业岗位进行了粉尘作业危害程度分级调查，结果表明：Ⅰ－Ⅱ级占５８．０６，Ⅲ－Ⅳ级占１７．２１；全民企业Ⅲ－Ⅳ级１５．７６％，集体企业占２２．８１８％；全民企业中炼钢系统占２８．６％，其它占５．６％，提示：粉尘在特钢企业中不是最主要的危害因素，炼钢是特网企业主要的粉尘危害源。     

梅山尾矿分级过滤试验研究

梅山尾矿水分太高且难脱水,给尾矿综合利用带来了困难。为了解决这一难题,2006年在选矿厂开展了尾矿分级过滤脱水半工业试验研究。在0．08～0．09MPa的试验压力下,获得了滤饼水分14．84％、过滤系数0．458t／（m^2·h）、粗颗粒尾矿产率42．68％、水力旋流器分级效率81．42％的结果。试验结果表明分级后的细颗粒尾矿利用现有的压滤机进行脱水,滤饼水分和循环生产时间都有所增加。分级过滤脱水对节约脱水成本也有好处,根据计算,每吨可以节约0．58元。     

采用气流粉碎、分级生产碳化钨粉的方法

该发明属于采用气流粉碎、分级生产碳化钨粉的方法，包括粗破碎、气流粉碎、气流分级及物料收集。该发明克服了传统思维及观念的影响将常规用于食品、医药、矿山等行业的气流粉碎、分级方法，根据WC硬度高、密度大、熔点高等特点设计气流粉碎、分级中各工艺参数，使之不但可生产平均粒度小于0．2μm的超细WC粉、且生产率提高3～4倍，产出率高达99．5％以上．产品中杂质含量及粗大和聚集颗粒大幅度降低。设备投资降低65％左右，生产成本降低40％～70％。而具有生产率高、生产成本低、产品质量及纯度高、设备投资省等特点。克服了球磨及筛分法难以生产粒径小于0．2μm的超细WC粉及生产率低、产品含杂量高、质量较差而生产成本高等缺陷。     

磨矿分级过程控制研究

本文就磨矿分级过程自动控制进行了论述，主要探讨在实现磨矿分级过程基础控制的前提下，实现给矿、给水、磨矿浓度、沙泵池液位的自动控制的几种方案，同时探讨了磨矿分级工艺指标控制方法。     

分级入炉可行性

分级入炉是高炉精料的重要措施之一，是对原料入炉前的准备工作，分级入炉对高炉顺行，降焦等有很多积极意义。     

铜镉渣浆旋流分级返液试验研究

文章分析了影响旋流器工作的因素，根据铜镉渣浆的特性及试验要求确定了族流器的主要技术参数。分级后，溢流加入絮凝剂澄清３０ｍｉｎ，所产上清率可达４６．５４％，上清质量达标。上清返回锌浸出，减轻了镉工序的体积压力，可提高镉锦品位，确保生产的正常进行。本文还提出了试验中所存在的问题及解决的办法。     

拜尔法原矿桨制备旋流器分级流程的选择

本文通过对拜尔法原矿浆生产流程：格子磨—旋流器一段分级与格子磨—分级机—旋流器两段分级工业试验进行比较、分析，确定了适应山西分公司生产的工艺流程，对提高格子磨产能，优化技术指标，降低生产成本有着重要意义。     

三级联动气流分级机对镍基热喷涂粉末分级效果的研究

本文采用了三级联动配置的叶片转子型离心式气流分级机,对镍基热喷涂粉末进行分级试验.结果表明,经过气流分级处理,粉末中的25μm以下细粉含量显著降低,由15％减少到3％左右;下级分级机产品产量随着本级分级轮转速的提高而降低;各级分级机得到不同粒度分布段的粉末产品;团聚效应在分级中影响很大,颗粒粒度越均匀,越能减少团聚效应的影响.     

铝土矿球磨-分级过程建模与仿真

建立铝土矿磨矿分级过程模型。对研究流程的行为和实现优化控制具有重要意义。本文通过试验研究了铝土矿的破碎特性．提出分段线性化的方法准确地描述铝土矿破碎速率随时间变化且不同粒级变化速率不同的情况。在此基础上求得了铝土矿的破碎分布函数：依据实际生产数据估算了物料的停留时间．建立了连续磨矿破碎速率的软测量模型。从而建立了铝土矿连续球磨总体平衡模型：基于罗辛-拉穆勒曲线和混杂曲线．并考虑不同生产条件对分级效果的影响。建立了螺旋分级过程的分级效率模型：基于序贯模块法的整个磨矿分级流程仿真结果证明了模型的有效性。     

错流离心分级装置的研制

通过合理设计分级设备中分级力场方向和介质流体流动方向,将离心力场与错流分级形式相结合,研制出一种新型的分级设备——错流离心分级设备,详细阐述了该设备的工作原理和优点,并以石英微粉为原料进行分级实验,实验结果表明该分级设备具有良好的分级性能。     

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.