褐铁矿烧结研究与生产

针对越南太钢的烧结机进行了越南褐铁矿烧结试验研究 ,详细进行了不同褐铁矿配比、混合料水分、抽风负压、燃料配比、烧结矿碱度烧结试验 ,详细分析了试验结果 ,结合褐铁矿烧结性能和矿相结构 ,找出了合适的生产工艺参数 :烧结矿碱度确定为 2 .0 ,配加生石灰的质量分数为 11% ,焦粉的质量分数为 7.3% ,水分的质量分数为7.0 % ,料层为 4 0 0 mm ,并成功地应用在越南太钢实际生产中。褐铁矿配比达到 37.7% ,利用系数达到 1.2 6t/(m2· h)。     

国内外烧结生产应用褐铁矿的现状及承钢的实验室试验研究

本文简述了国内外配加褐铁矿生产烧结矿的生产现状，以及国内外关于褐铁矿烧结机理的研究探讨，阐述了承钢配加某进口褐铁矿烧结的实验室初步试验研究，指出了褐铁矿用于烧结生产的广阔前景。     

优化烧结料层中的焦粉偏析应对烧结矿质量恶化

由于需求的增加以及优质资源的减少，已经导致日本的钢铁公司被迫使用低等级铁矿石。尤其，豆状褐铁矿比例相当高。因此，随着豆状褐铁矿比例的提高，导致烧结矿生产力降低的严重问题。为了提高烧结生产能力，在实验验研究了烧结机高效布料装置。研究结果表明：（1）一般期望，缩短在高豆状褐铁矿石配比烧结的中下部1200℃以上的高温保持时间。另一方面，为了要保证烧结矿的强度，一般建议高豆状褐铁矿石配比烧结过程超过1200℃的时间必须延长；（2）依照豆状褐铁矿石配比有最适宜的焦粉偏析程度，它随豆状褐铁矿配比的增加而减小；（3）为控制烧结料层中焦粉的偏析，引进了磁力制动布料器（MBF），并在实验室烧结杯研究了实验布料器的操作情况；（4）基于那些基础研究，MBF已经被应用于Keihin No.1烧结机，烧结矿强度保持不变，而烧结机生产力提高了4．2％。     

国内外烧结生产应用褐铁矿的现状及承钢的实验室试验研究

本文简述了国内外配加褐铁矿生产烧结矿的生产现状，以及国内外关于褐铁矿烧结机理的研究探讨．阐述了承钢配加某进口褐铁矿烧结的实验室初步试验研究，指出了褐铁矿用于烧结生产的广阔前景。     

北钢炼铁厂360m~2烧结机配加褐铁矿的实践

北钢炼铁厂360 m2烧结机通过调整操作参数,适当提高混合料水分、焦煤粉配比和烧结料层厚度,将火箭粉、扬迪粉、PB粉等褐铁矿配比逐步提高到45%左右,其产量、质量达到了国内同类型企业的先进水平,既充分利用了矿粉资源,又降低了烧结矿成本,为同类型企业烧结配加褐铁矿提供了宝贵的经验。     

永通公司高比例褐铁矿烧结的生产试验

为了应对资源危机,降低烧结矿成本,永通公司就高比例配用廉价褐铁矿粉烧结进行了生产试验,并对高褐铁矿配比条件下适宜的操作参数和强化烧结的措施进行了探索。在保证烧结矿产量和质量的前提下,实现了烧结矿成本的降低。     

国内褐铁矿烧结技术发展现状及影响因素分析

高配比褐铁矿烧结一直是降低铁前成本的措施,为此国内各大钢厂进行了大量褐铁矿烧结试验和工业试验研究,针对褐铁矿烧结存在的问题,结合各大钢铁企业的烧结生产实践,总结和分析了褐铁矿烧结技术的发展现状,提出了褐铁矿烧结的应对措施。     

褐铁矿在烧结工艺中的优化配置

为了探究全进口矿条件下褐铁矿在烧结工艺中的合理配置,实现褐铁矿的高效利用以进一步提铁降本,针对S钢铁公司500 m2大型烧结机实际原燃料条件,基于试验用铁矿粉的常规理化性能和高温烧结基础特性开展了不同褐铁矿配比的烧结杯试验研究,结合Factsage 7.1热力学软件,模拟计算了不同褐铁矿配比条件下的黏附粉含量和理论液相生成量及性能,并采用矿相显微镜分析了烧结矿的显微结构,探明了褐铁矿与赤铁矿和磁铁矿的优化搭配规律。研究表明:澳大利亚褐铁矿具有粒度粗、矿化能力弱,同化温度低、黏结相强度差、吸液性强的特点,当褐铁矿质量分数由45%增加至55%时,提高磁铁精矿OD矿的质量分数至15%,同时降低OC矿质量分数至10%,烧结矿转鼓强度和低温还原粉化性能等指标达到最优,这是由于一方面提高磁铁精矿配比不仅具有增加黏附粉比例、改善液相生成数量和性能的作用,而且可以均匀液相分布,消除过熔现象;另一方面,增加磁铁精矿配比可以改善烧结料球的粒度组成,减少褐铁矿吸液量,提高烧结矿强度。因此,在高褐铁矿配比条件下,增加适宜的磁铁精矿配比有利于稳定烧结矿质量,全面改善烧结矿性能。      

高配比褐铁矿烧结的实验研究

介绍了配加褐铁矿烧结的生产特点、关于褐铁矿烧结机理的研究探讨,并根据安钢目前原料情况进行了褐铁矿的烧结实验室研究。实验中改变燃料比、抽风负压、混合料水分、料层厚度等相关烧结参数,通过优化原料结构,使安钢顺利实现高比例褐铁矿烧结。     

进一步降低烧结工艺成本的优化配矿试验

 为了降低烧结工艺生产成本,针对北钢360m2烧结机的原料条件及生产状况,对现有配矿方案进行了进一步优化。在基本不改变混合料品位、碱度和SiO2含量等指标的基础上,通过增大低成本矿粉配比,降低高成本矿粉配比,同时调整其他原料配比,制定6种成本较低的配矿方案,并通过烧结杯试验进行了验证。结果表明,2种澳洲矿粉的总配比不宜超过45%;2种巴西矿粉的配比应尽量一致;最优配矿方案可降低烧结混合料成本16.02元/t,且烧结生产指标及烧结矿质量会有改善;仅仅通过调整现有矿粉配比,就可以在改善烧结生产经济技术指标的同时,实现烧结成本的进一步降低。     

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

正~~     

Zinc Production by Province in 2014

正~~     

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.