配加不同造渣剂的转炉渣物相组成研究

介绍了攀钢转炉渣化学尬发特点及矿物相组成的特征；对配加锰矿，萤石，石英砂的渣进行了相成分分析。结果表明配加不同造渣剂，其脱磷，硫矿物相是不相同；通过不同造渣剂的渣对炉衬的任用分析认为，配加锰矿的渣属于粘渣，对炉衬有保护作用；则配加石英砂及萤石的渣均属于稀渣，对炉衬衬有侵蚀作用。     

鞍钢鲅鱼圈分公司高炉合理造渣制度研究

为探索二元碱度、MgO和Al2O3含量对鲅鱼圈高炉炉渣性能的影响,进行了配渣试验研究及炉渣成分预测模型开发工作。结果表明,在采用高比例进口矿条件下,其合理的造渣制度为碱度小于1.17,渣中wMgO在9%左右,wAl2O3小于16%,wAl2O3/wSiO2小于0.45。通过炉渣成分预算可测算炉料结构发生改变,尤其是进口块矿比例和Al2O3含量波动大的矿种变化时预算炉渣成分。     

高比例块矿在1080 m3高炉的应用实践

为降低铁前成本,永锋钢铁高炉冶炼配加高比列块矿。为了降低高比例块矿配用对高炉的影响,采取块矿烘干、提高筛分效果、调整造渣制度和热制度、保证风速和鼓风动能、加强高炉生产管理等措施,使炉况长期稳定顺行。块矿配加比例增加至20%后,高炉产量4 000 t/d以上,煤比175 kg/t以上,焦比350 kg/t以下,吨铁成本降低30元左右。     

迁钢2号高炉大矿批冶炼实践

对迁钢2号高炉大矿批冶炼实践进行了总结。由于经济炉料的使用配加,高炉技术经济指标有所降低,通过不断优化装料制度和造渣制度,取得了较好的效果。     

利用钢渣制备造渣剂的成型实验研究

在添加有机粘结剂的条件下采用冷压团成型工艺进行了钢渣制备造渣剂的成型实验研究,考察了粘结剂用量,配水量和成型压力对压团力学性能的影响,当粘结剂用量为0.25%～0.30%,配水量为12%,成型压力为50 kN时,制得的压团干、湿落下强度都超过10次/球,抗压强度在1 kN/球以上,能够满足工业生产对造渣剂强度的要求.制备的造渣剂同时具有熔点低、化渣快、脱除钢中有害物质能力强的特点,在冶金性能上满足炼钢用造渣剂的要求.     

葫芦岛有色课题攻关获突破

中冶葫芦岛有色金属集团有限公司一项科研课题攻关项目获得重大突破,取消锌精矿、铅精矿,仅使用混合矿和中间氧化物料进行配料的生产模式正式应用到铅锌冶炼厂系统生产中。此举将改变ISP生产工艺原采用锌精矿配烧混合矿加中间物料的生产模式,每年可为公司降低锌精矿采购成本上千万元。     

球团返矿二次利用新途径

为了合理利用济钢球团厂的球团返矿,根据球团返矿的特性,进行了冷固结压团试验研究,以寻求适合压团的原料粒度组成及添加剂.试验结果表明:将球团返矿破碎至小于4mm的粒级,另配加部分铁精矿进行压团,同时配加两种不同的添加剂,压球的强度和铁品位都达到了较理想的指标.     

降低吨钢铁水量的转炉冶炼工艺

采用变量法精确确定了吨钢入炉铁水量调整后转炉系统的热量亏空,通过优化调整转炉造渣物料结构,减少强冷却效果物料的使用量,配加反应速度快、升温效率高的碳-硅质发热剂,稳定解决了吨钢铁水量降低所带来的转炉系统热量不足的问题,提高了入炉废钢比。在工业生产顺行的基础上,80 t转炉入炉铁水量由860 kg/t钢降低到800 kg/t钢。     

平炉采用烧结矿和团矿代替矿石和石灰石

在平炉装料中采用碎矿会导致熔化时间的延长和这个时期内从炉中喷出金属和炉渣,此外还增加装料时间内由废气带走的碎矿颗粒,从而加速沉渣室的填满和格子砖的堵塞。为此,必须把细碎的原矿与溶剂配合成团矿(造块),才能保证氧化铁和石灰紧密的接触,以便于造渣和在熔化前期得到高碱度炉渣,并具有足够含量的氧化铁。虽然在苏联好几个钢厂内使用氧化和自熔性的烧结矿以及矿石～石灰石团矿的实验效果都良好,但平炉用团块物料的成批生     

包头铁精矿配加蛇纹石烧结试验

近几年来,在烧结料中配加一定量的含镁熔剂,使烧结矿MgO含量维持在2.5—3.0％,已在高炉冶炼中取得了良好的效果。增加烧结矿MgO含量,可以提高软化温度,减小高炉炉渣粘度受炉温波动的影响。因此,含MgO物料已成为烧结料中必不可少的添加物。包钢使用的含镁物料和全国大多数厂家一样,是白云石。由于包头铁精矿含SiO_2低,为保证烧结矿强度和高炉内造渣的需要,烧结料中要配一定量的高硅矿粉,使SiO_2维持在7.0—7.5％左右。     

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.