高铅烧结矿的升温还原和高温性能

为调查Ａｌ２Ｏ３对烧结矿的还原少高温性能的影响,对不同Ａｌ２Ｏ３含量的烧结矿进行加热还原。调查了高铝烧结矿的初始软化温度和压损。同时用Ｘ射线观察了还原过程,用ＥＰＭＡ和ＳＥＭ分析了冷却后的试样,发现高铝烧结矿在还原初始阶段存在大量的ＦｅＯ－２ＣａＯ·ＳｉＯ２·Ａｌ２Ｏ３共晶相。高铝烧结矿在较低温度下会产生大量的富Ａｌ２Ｏ３熔融相。     

凝固过程钢中氧化物成分对氧化物和硫反应的影响

为了阐明钢在凝固过程中氧化物和硫之间的反应，观察分析了连铸钢氧化物成分对它的影响，结果如下：在低Ａｌ含量钢中（Ａｌ＝０．００５％）观察到ＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３和ＣａＯ－ＳｉＯ２氧化物，在高Ａｌ含量钢中（Ａｌ＝０．０３１％）看到ＣａＯ－Ａｌ２Ｏ３氧化物。ＣａＯ－ＳｉＯ２＿Ａｌ２Ｏ３和ＣａＯ－Ａｌ２Ｏ３氧化物比ＣａＯ－ＳｉＯ２氧化物具有较高的硫含量。氧化物中的Ｓ含量随钢在凝固温度下的液相率和硫容     

添加CaO对Al2O3陶瓷混合料烧结过程活化的研究

对用高温结构陶瓷替代传统的高纯金属铜，制备高炉风嘴的可能性进行了研究，用ＳＦＭ、Ｘ射线衍射和动态模拟实验法分析了氧化铝瓷烧结过程。结果表明，在实验条件下添加２．５％ＣａＯ、３．５％ＳｉＯ_２的制品，烧结性能与力学性能最佳。制品中形成的ＣａＯ·６Ａｌ_２Ｏ_３和ＣａＯ·Ａｌ_２Ｏ_３·２ＳｉＯ_２复相促进了烧结，并使高温相接触紧密，改善了力学性能。     

氧化锰在锰铁渣中的热力学活度及金属与渣相间锰的分布

研究了埋弧炉锰铁生产中由ＭｎＯ－ＣａＯ－ＭｇＯ－ＳｉＯ２－Ａｌ２Ｏ３组成的标准炉渣。渣中Ａｌ２Ｏ３含量固定在５％。本研究目标集中在１５００℃时锰铁渣中ＭｎＯ的热力学活度上。为了达到校准的目的，在１３００、１４００和１５００℃时重新测定了Ｍｎ在Ｐｔ－Ｍｎ合金中的热力学活度。在１５００℃ＣＯ气氛下研究了碳饱和的Ｍｎ－Ｓｉ－Ｆｅ－Ｃ合金与ＭｎＯ－ＣａＯ－ＭｇＯ－ＳｉＯ２－Ａｌ２Ｏ３渣之间的平衡。在试验中发现，ａＭｎＯ值随着ＭｎＯ的增加而增大，趋向于随ＣａＯ／ＭｇＯ比的增大而增大。ａＭｎＯ值也随着碱度的增大而增大。在渣－金属平衡试验中，金属相中碳和硅的含量为反比关系。当硅含量一定时，由于Ｍｎ／Ｆｅ比增加，碳在金相中的溶解度增加。金属中含硅量随着渣中ＳｉＯ２含量的增加而增加．以及当ＭｇＯ代替渣中的ＣａＯ时，金属中含硅量增加。增大渣碱度使金属相含硅量降低。     

气压烧结Re—α＼β—Sialon陶瓷材料

选用Ｓｉ３Ｎ４，ＡｌＮ，Ａｌ２Ｏ３和Ｓｎ２Ｏ３（或Ｎｄ２Ｏ３）粉末为原料，在１８００～１９５０℃的温度范围内，１．０～３．０ＭＰａ氮气压力下烧吉（ＧＰＳ），制备了性能优良的Ｒｅ－α／β－Ｓｉａｌｏｎ（Ｒｅ＝Ｎｄ，Ｓｍ）陶瓷材料，利用ＸＲＤ，ＥＤＳ，ＴＥＭ和ＥＲＥＭ手段研究了材料的相组成，显微结构特性与其性能的关系。结果表明，其主晶相为长柱状的β－Ｓｉｌａｏｎ和近似等轴的Ｒｅ－α－Ｓｉａｌｏｎ，晶界     

钢中夹杂物含量及其形态对钢力学性能的影响

在实验室１６ｋｇ真空感应炉上对铝镇静钢水用ＣａＯ－ＣａＦ２－Ａｌ和ＣａＯ－ＣａＦ２－Ａｌ－Ｃａ进行精炼处理，降低了钢中硫含量和总氧含量，研究了钢中氧化物和硫化物夹杂的含理及其形态对钢力学性能，尤其是冲击韧性的影响。钢水经钙处理后，钢中硫含量和总氧含量都可降低到１０ｐｐｍ以下，且钢中Ａｌ２Ｏ３和ＭｎＳ夹杂物能完全转变成硫化钙和铝酸钙，钢的转变温度低于－６０℃，而且钢的各向异性消失。     

弹簧钢夹杂物形态控制

分析了高应力条件下弹簧疲劳断裂的主要原因以及用稀土控制弹簧钢夹杂物形态的局限性。指出了ＭｎＯ－Ａｌ２Ｏ３－ＳｉＯ２或ＣａＯ－Ａｌ２Ｏ３－ＳｉＯ２三元塑性夹杂物的成分范围,并以６０Ｓｉ２ＣｒＶＡ为例确定之与相平衡的钢液脱氧条件,提出了相应的工艺措施。     

RECl3与NH4HCO3的沉淀反应及伴生杂质的共沉淀行为

本文通过对沉淀过程的ｐＨ值变化特征研究和沉淀物的组成分析，确定了ＮＨ４ＨＣＯ３与ＲＥＣｌ３的沉淀反应。研究了伴生金属离子Ａｌ３＋、Ｆｅ２＋、Ｍｎ２＋、Ｃａ２＋、Ｍｇ２＋随稀土的共沉淀行为，讨论了杂质离子对产品纯度的影响。     

二茂铁甲酸稀土配合物的合成与表征

本文用稀土高氯酸盐ＲＥ（ＣｌＯ＿４）＿３·ｎＨ＿２Ｏ（ｎ＝８或９）与二茂铁甲酸钠盐ＮａＬ在无水乙醇中反应，合成了四种新的稀土配合物。通过元素分析、红外光谱、ＴＧ－ＤＴＡ分析和ｘ射线粉末衍射分析等手段研究了配合物的性质，确定这些配合物的组成为［ＲＥＬ＿３（Ｈ＿２Ｏ）＿２］·ｎＨ＿２Ｏ（式中ＲＥ为Ｐｒ、Ｎｄ、Ｓｍ、Ｙ、ｎ＝２或），配体羧基以双齿配位。ＲＥ的配位数为８。     

CaO-MgO-SiO2-Al2O3-FetO-MnO-P2O5渣系中FetO和MnO活度的测定和研究

利用渣－钢热力学平衡研究了ＣａＯ－Ｍｇｏ－ＳｉＯ２－Ａｌ２Ｏ３－ＦｅｔＯ－ＭｎＯ－Ｐ２Ｏ５渣系对钢水二次氧化的行为。得到了渣中ＦｅｔＯ活度的近似表达式。在固定ＦｅｔＯ摩尔分数的条件下,ＦｅｔＯ的活度系数在炉渣碱度（ＮＣａＯ＋ＮＭｇＯ＋ＮＭｎＯ）／（ＮＳｉＯ２＋ＮＡｌ２Ｏ３＋Ｎｐ２Ｏ５）达到２．５左右时出事最大值;而ＭｎＯ的活度系数则随碱度的增加逐渐增大。γＦｅｔＯ（Ｌ）在ＮＦｅｔＯ固定时,随渣中（     

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.