Cao—SiO2—CaF2—Na2O四元渣系的挥发

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。     

CaO—SiO2—Na2O三元渣系的挥发率

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。     

高速连铸保护渣的粘性特征

采用ＣａＯ－ＳｉＯ２－Ｎａ２Ｏ－ＣａＦ２－Ａｌ２Ｏ３－ＭｇＯ渣系,通过测定熔渣的粘度、凝固温度和粘性活化能,研究了连铸保护渣的粘性特征与碱度、ＮａＣＯ３含量、ＣａＦ２含量、Ａｌ２Ｏ３含量和ＭｇＯ含量之间的关系。利用连铸保护渣的粘性特征与化学成分之间的回归方程,可以设计满足一定粘性特征的连铸保护渣。     

Cao—SiO2—CaF2三元渣系的挥发率

通过质量损失法对ＣａＯ－ＳｉＯ２－ＣａＦ２三元渣系挥发率与温度、渣组成的关系进行了研究。结果表明：在渣完全熔化之前有一临界温度，其值大小因渣而异，即酸性渣具有低温临界点；碱性渣具有高温临界点；中性渣则两个临界点均存在；当渣的碱度过高（Ｒ≥１．４）或ＣａＦ２含量减少（≤１０％）时，这两个临界点均不存在。临界温度对渣的挥发率有明显影响；在渣完全熔化之后，挥发率将随碱度的降低及ＣａＦ２含量的增加而提高。     

高速钢W6Mo5Cr4V2的脱磷试验

在３０ｋｇ感应炉上用ＣａＯ－Ｎａ２ＣＯ３－ＣａＦ２－ＦｅｘＯ（ＭｏＯ３）渣、ＭｏＣｌ６粉剂和Ａｌ－Ｃａ合金作脱磷剂对高速钢Ｗ６Ｍｏ５Ｃｒ４Ｖ２进行脱磷试验。结果表明，ＣａＯ－Ｎａ２ＣＯ３－ＣａＦ２－ＦｅｘＯ渣的脱磷效果最好，一般脱磷率可达２６％￣５６％。     

CaO—Al2O3—CaF2—SiO2—MgO五元精炼渣系的起泡性能

采用二次回归正交试验方法测定了１５３０℃下ＣａＯ－Ａｌ２Ｏ３－ＣａＦ２－ＳｉＯ２－ＭｇＯ五元精炼渣系的起泡性能。得出炉渣起泡指数与炉渣光学碱度、渣中Ａｌ２Ｏ３及ＣａＦ２含量间的回归方程。结果表明：炉渣的光学碱度和ＣａＦ２含量对起泡指数有较大影响,而Ａｌ２Ｏ３含量对起泡指数影响很小。具有最佳发泡性能的炉渣成分中ＣａＯ,Ａｌ２Ｏ３,ＣａＦ２,ＳｉＯ２,ＭｇＯ的质量分数分别为：４４．０６％,３０．００％,７．００％,８．９４％,１０％。研究结果还表明：炉渣起泡指数与炉渣粘度成正比,而与表面张力和密度的平方根成反比。     

用苏打作熔剂添加剂对铁水同时进行脱磷脱硫的研究

向ＣａＯ－ＣａＦ２－Ｆｅ２Ｏ３脱硫磷剂中添加少量苏打，不仅能显著提高原脱磷剂的脱磷能力，还能同时脱除可观数量硫的效果。此外，文中还初步研究了ＣａＯ－ＣａＦ２－Ｆｅ２Ｏ３－Ｎａ２ＣＯ３熔剂对铁水同时进行脱磷脱硫的最佳组成和影响因素。     

CaO—SiO2—MgO—Al2O3精炼渣的脱硫性能

在实验室用模拟装置研究了ＣａＯ－ＳｉＯ２－ＭｇＯ－Ａｌ２Ｏ３精炼渣脱硫的性能。碱度和助溶剂ＣａＦ２含量对硫分配比Ｌｓ影响较为显著，并分析了ＭｇＯ、Ａｌ２Ｏ３对脱硫反应的作用。     

CaO-SiO2-Fe2O3-MnO2-MgO-P2O5系熔剂对钢液脱磷、回磷的实验研究

在１８５３Ｋ的温度下,利用ＣａＯ－ＳｉＯ２－ＦｅＯ３－ＭｎＯ２－ＭｇＯ－Ｐ２Ｏ５系熔剂,对钢液进行脱磷、回磷实验,研究熔剂碱度ＣａＯ／ＳｉＯ２和氧化性（Ｆｅ２Ｏ３＋ＭｎＯ２）对钢液脱磷、回磷的影响,研究得出,防止钢液回磷的先决条件是：控制熔剂碱度和氧化性大于其临界值。实验发现,用适量ＢａＯ取代ＣａＯ基熔剂中的ＣａＯ,可有效控制钢液的回磷。     

高碱度控制氧位渣系（BaO—BaCl2—Cr2O3）对含铬铁水选择氧化脱磷影响的研究

在实验室条件下，以小渣量研究了ＢａＯ－ＢａＣｌ２（或ＢａＦ２）－Ｃｒ２Ｏ３系脱磷剂对高铬铁水脱磷时，脱磷剂中溶剂（ＢａＣｌ２和ＢａＦ２），氧化剂（Ｃｒ２Ｏ３和Ｆｅ２Ｏ３），渣量，铁液中原始〔％Ｃ〕和〔％Ｓｉ〕，以及温度对脱磷率的影响。     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

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.