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高速连铸保护渣的研究 总被引:3,自引:0,他引:3
对国外引进的几种高速连铸保护渣的组成和性能的分析和其它实验研究,得到高速加铸保护渣具有:高F^-、高碱金属氧化物,低Al2O3含量,低粘度,低熔化温度和良好玻璃性的特点;LiO2是实现低粘度和良好玻璃性不可少的成分;MDI指数反映了和结构有关的保护渣性能等有参考价值的结论。 相似文献
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连铸保护渣基料挥发率的测定 总被引:2,自引:2,他引:0
通过回归正交设计确定了连铸保护渣基料(CaF2-CaO-SiO2-Na2O)挥发率与碱度、Na2CO3、CaF2含量、温度及时间的二次函数关系式。分析结果表明,在碱度较低或时间较短时,Na2CO3、CaF2含量对挥发率影响不大;在上述5个因素中,温度对挥发率影响最大,而Na2CO3对挥发率的影响超过CaF2。 相似文献
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高速连铸时,采用新的AFAX型结晶器保护渣可以减少漏钢、改善钢的质量、提高铸机产量。为了减少漏钢,采用一种润滑性能较好的保护渣,当增加保护渣的耗量、降低保护渣的粘度或凝固点时均可提高保护渣的润滑性能。AFAX型结晶器保护渣的成分对渣的性能影响程度如表1。高速连铸时加入专用的保护渣造渣剂(如MnO、MgO、BaO、Li2O)对降低保护渣的粘度和凝固点有很好的效果。 为了改善钢的质量尤其是表面质(通常表现为裂纹),一般采用具有低热交换性能的保护渣,高速连铸薄板坯时采用高碱度低粘度(表2中Flux2)的保护渣可以… 相似文献
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Li2O在保护渣中的作用 总被引:7,自引:0,他引:7
采用在不同玻璃性的两种基渣中加入Li2O为研究Li2O对保护渣粘度,熔化温度及玻璃性能的影响,并对Li2O改善保护渣玻璃性的机理进行了探讨,提出了寻找高速连铸保护渣中Li2O的代用物的一种方法。 相似文献
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通过回归正交设计确定了连铸保护渣基料挥发率同温度、Na2CO3含量、CaF2含量、减度及时间的二次函数关系式。分析结果表明,温度对挥发率的影响随着Na2CO3含量的增加而增加;碱度R为0.9时挥发率最大;Na2CO3对挥发率的影响略高于CaF2。 相似文献
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用2,6-二酮吡啶-18-王冠-6(2-6-DKP-18-Crowe-6),SPAN80,S100N-I(中性油)和C2H2Cl4乳状液膜体系,研究了Pb62+的迁移行为。在适宜条件下,8min内Pb^2+的迁移率达99.5%以上,而而这种情况下,许多金属离子如Fe&3+,Ni^2+,Cr^3+,Li^+,∑RE^3+,K^+,Na^+,Ca^2+,Mg^2+,Ba62+,Sr^2+,Al^3+, 相似文献
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CaO—SiO2—Na2O三元渣系的挥发率 总被引:2,自引:0,他引:2
采用失重法对CaO-SiO2-Na2O三元渣系在不同温度下的挥发率进行了测量。结果表明,在烧结温度下,低熔点渣的挥发率呈三段式变化,而高熔点渣无此特性;当修正碱度R′>1、成分固定时,只有在温度超过其流动温度时才能显著提高挥发率;温度一定时,挥发率随着碱度R及Na2CO3含量的增加而提高;当R′<1时,温度、碱度、Na2CO3含量对挥发率的影响都不大。 相似文献
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本文研究了在三种电解质中熔民解精炼制得的钆的性质。研究发现,在三种电解质中,金属钆沉积物具有不同形态--80molTLiC1-18mol%LiF-2mol%GdF3中为片状形态,750mol%LiF-10mol%BaF2-15mol%GdF3中为块状形态,75mol%LiF-25mol%GdF3中为针状形态,在LiF-BaF2-GdF3熔盐中,当电流提高到0.8A(初始电流密度1.6Acm^2)时 相似文献
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<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 相似文献
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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, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
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, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
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. 相似文献
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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. 相似文献
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正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献