攀钢高炉“消泡增钒”途径的探讨

本文从攀钢钒钛烧结矿高炉冶炼产生的泡沫渣问题追述炉内泡沫渣的生成情况。对比了各种块矿抑制炉内泡沫渣的不同效果,认为钒钛块矿“抑制”泡沫渣的效果大于普遍块矿“稀释”TiO_2、减少泡沫渣的作用。解释了配加钒钛块矿消除泡沫渣的原因。探讨了攀钢高炉近期的合理炉料结构,即炉料中配加白马块矿和会理块矿,以达到控制泡沫渣、改善生铁质量、提高生产指标的综合效果。     

铁水脱硅过程泡沫渣的基本特征

采用Ｘ光透视装置,直接观察了铁水脱硅过程泡沫渣现象,结果表明：当脱硅剂投入铁水,泡沫渣随即升腾,以烧结矿为脱硅剂时,泡沫渣从激烈、平缓、再升高,最后塌落,以富矿粉、铁鳞为脱硅剂,泡沫渣起始激烈、逐渐衰减。泡沫渣的孔隙度高,后期脱渣中有铁珠悬浮。     

转炉冶炼末期泡沫渣高度控制技术

介绍了一些先进钢厂在转炉冶炼末期泡沫渣高度控制技术。温差法、微波法和声学法都被用于测量转炉冶炼过程中的泡沫渣高度,能够有效防止喷溅和控制泡沫渣高度。此外,讨论了迁钢公司利用温差法测量冶炼末期泡沫渣高度的可行性。     

中小型铸造厂电弧炉泡沫渣埋弧熔炼高锰钢

本文介绍了泡沫渣的基本概念,探讨泡沫渣形成的基本原理和影响因素,针对中、小型铸造厂的实际情况和生产条件,分析了普通功率电弧炉泡沫渣埋弧熔炼高锰钢的工艺条件和渣系选择.     

泡沫渣在电弧炉炼钢过程中的应用

泡沫渣在电弧炉炼钢过程中被广泛地用作以加快熔炼过程,并且节约电能消耗。泡沫渣技术的关键是渣泡沫化过程中的最佳泡沫厚度,而最佳泡沫厚度又由诸如喷吹频率、焦炭品质、特定喷吹量等喷吹参数和渣的粘度、组成、温度等渣的特性来决定,掌握这些方面,对充分利用泡沫渣技术是非常必要的。针对以上,分别在20t和50t电弧炉上进行了试验。由于在实际的电弧炉炼钢过程中没有准确地测量泡沫厚度的方法,而影响理论泡沫厚度的不同喷吹参数及渣的成份与熔炼电耗息息相关。目前的研究结果与早期实验室条件下所得到的结论相一致,即喷吹参数、渣的粘度、组成（包括FeO含量）、碱度等影响渣的泡沫厚度和泡沫化过程。文章讨论了不同冶炼参数对比不同的泡沫特性以及从中得出节约能耗的最佳途径。     

高铅渣侧吹还原熔炼过程中泡沫渣的行为研究

高铅渣侧吹还原熔炼过程中产生的泡沫渣将会影响铅渣分离,导致粗铅及还原渣的排放困难,严重时泡沫渣将会从炉内喷出,对设备造成危害,甚至危及人身安全。结合侧吹炉还原熔炼工艺过程,对高铅渣侧吹还原熔炼过程中泡沫渣的行为进行了研究,分析了其产生原因,提出了判断依据,并针对加料期产生泡沫渣的3种情况给出了相应的预防措施。     

泡沫渣行为研究

德国人Matjaz juhart等用实验室装置和图像分析法研究了炼钢泡沫渣的行为，供助图像分析可以连续观察和计算泡沫渣的形成过程，介绍了溶渣成分尤其MgO含量对泡沫渣行为的影响。     

钢包精炼用泡沫渣技术

随着泡沫渣埋弧操作技术在超高功率电炉上的推广应用，进而引入到钢包精炼的电弧加热工避，并收到显著效果，本文着竽对泡沫发泡机理、泡沫渣的组成、熔渣的物性及其对发 影响和泡沫渣埋弧操作的效果作了综述。     

电炉炼钢全程采用泡沫渣操作的工艺探讨

在普通功率电炉上采用两种不同类型的熔渣，分别在熔氧期、还原期进行泡沫渣冶炼。与一般氧气＋碳粉喷吹的泡沫渣工艺相比，本工艺可以用冶炼各期。渣的成分、粘度、表面张力、颗粒大小和工艺操作的控制等，对形成稳定、持久性的泡沫渣很重要。由于使用泡沫渣操作技术使长电弧埋入泡沫渣中，从而达到了电耗下降、冶炼时间减少、还原期脱氧剂减少、炉衬寿命提高、钢的质量得以改善的目的。应用本工艺，见效快，操作简单。     

脱硅工艺参数对泡沫渣的影响

用X－光透视装置,观察分析了脱硅工艺参数对泡渣的影响,结果表明,铁水温度过高,过低都会助长泡沫渣,均匀加入适量脱硅剂对缓解泡沫渣是有益的。提高脱硅渣碱度有利于降低泡沫渣,也有利于脱硅。     

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.