电位滴定法连续测定钴、镍和铜的方法研究（Ⅱ）

本文以Ｐｔ电极作指示电极,Ｗ电极作参比电极,在氨性介质中,以Ｋ＿３Ｆｅ（ＣＮ）＿６滴定Ｃｏ￣（２＋）以后,继而利用Ｆｅ（ＣＮ）／Ｆｅ（ＣＮ）作指示离子,在ｐＨ５．５～６．０,用Ｚｎ￣（２＋）返滴定ＥＤＴＡ,连续测定Ｎｉ￣（２＋）或Ｎｉ￣－Ｃｕ含量,再用硫酸肼作Ｃｕｙ￣（２－）的释放剂,Ｚｎ￣（２＋）返滴定释放出的ＥＤＴＡ测定Ｃｕ￣（２＋）,实现了Ｃｏ－Ｎｉ－Ｃｕ连续测定。镍精矿样分析的相对标准偏差和试样中标准回收率分别为Ｃｏ：１．４％,９９．５±１．２％。Ｎｉ：１．１％,１００．１±０．９％。Ｃｕ：２．０     

催化光度法测定钢铁中微量铜

本文研究了在氨水介质中,铜（Ⅱ）催化过氧化氢氧化苯酚红褪色的新指示反应。据此建立了催化褪色光度法测定痕量铜的新方法。本方法检出浓度为８．０×１０￣（－１０）ｇＣｕ￣（２＋）／ｍｌ,测定范围为０．３～１．１μｇＣｕ￣（２＋）／２５ｍｌ。用于钢铁样品中微量铜的测定获得了满意的结果。     

钛的交流示波极谱滴定

在ｐＨ５的ＨＡ－ＮａＡｃ－ＫＢｒ－Ｈ＿２Ｏ体系中，用ＣｕＳＯ＿４标准溶液滴定Ｔｉ，以Ｃｕ￣（２＋）在交流示波极谱ｄＥ／ｄｔ－Ｅ曲线上出现出口直接指示滴定终点。Ｔｉ量分析范围为１．００－２５．００ｍｇ，方法回收率为９９．５－１００．３０％。对于含Ｔｉ０．５０％以上的试样分析１０大的相对标准偏差为０．９５－２．０５％．     

耐硫酸露点腐蚀用NS1钢的开发和应用

新开发的耐硫酸露点腐蚀用ＮＳ１钢（≤０．１４Ｃ，０．５￣１．０Ｃｒ，０．２５￣０．５０Ｃｕ，≤０．１５Ｔｉ，≤０．１５Ｓｂ），具有良好的耐硫酸露点腐蚀性能和焊接性能，已广泛应用于石油化工等领域。     

4-(5-氯-2-吡啶偶氮)-1,3-二氨基苯显色树脂相分光光度法测定痕量Cu(Ⅱ)

在ｐＨ４．７ 酸性介质中,Ｃｕ（Ⅱ）与４－（５－氧－２－吡啶偶氮）－１,３－二氨基苯生成有色络合物,与强酸性阳离子交换树脂交换吸附,可进行树脂相分光光度法测定痕Ｃｕ（Ⅱ）．最大吸收波长λ_ｍａｘ＝５００ｍｍ,表观摩尔吸光系数８＝２．８ｘ１０~５,Ｃｕ（Ⅱ）量在０～９μｇ／２５ｍＬ范围内符合比尔定律．用此法测定水样中痕量Ｃｕ（Ⅱ）,结果令人满意．     

间氯偶氮安替比林与钴显色反应的研究及其应用

本文研究了ＣＯ（Ⅱ）与间氯偶氮安替比林（ＭＣＡＡ）的显色反应条件，结果表明，在ｐＨ＝８．５氨性缓冲液中，生成的配合物，其最大吸收波长为６３５．０ｎｍ，表观摩尔吸光系数５．０×１０￣４，Ｃｏ（Ⅱ）的浓度在０～２０μｇ／２５ｍｌ范围内服从比耳定律，用于铸铁中钴的测定，获得了满意结果。     

铱－钼酸盐－罗丹明B缔合显色反应的研究

在聚乙烯醇（ＰＶＡＶＡ）存在下,铱与钼酸盐和罗丹明Ｂ（ＲＢ）形成离了缔合物。缔台物的最大吸收位于５７０ｎｍ摩尔吸光系数ε８．３６×１０￣５’Ｌ·ｍｏｌ￣－１·ｃｍ￣－１,服从比尔定率范围为０～２．７５μｇｌｒ／２５ｍｌ。测定２．０μｇ铱的相对标准偏差为２．５％（ｎ＝７）,检出限４３ｎ／ｍｌ（ｎ＝１２）。测定铱的适宜条件为ＣＨＣｌＯ＿４＝０．９３ｍｏｌ／Ｌ,Ｃ＿ＭｏＯ￣２－＿４９．０×１０～－４ｍｏｌ／Ｌ,Ｃ＿ＲＢ＝３．３×ｌ０￣－５ｍｏｌ／Ｌ,ＰＶＡＯ０８％。试验了３０多种共存离子的影响,除形成杂多酸元素     

用H2O2作还原剂稀硫酸浸出锰结核

在Ｈ＿２Ｏ＿２存在下用稀硫酸浸出太平洋锰结核，首先将高品位锰结核磨细至０．０７４ｍｍ，浸出条件：矿浆浓度ｌｇ／Ｌ、Ｈ＿２ＳＯ＿４浓度３．５×１０￣３～２５×１０￣（－２）ｍｏｌ／Ｌ、Ｈ＿２Ｏ＿２，浓度１．７×１０￣（－３）～２．６×１０￣（－２）ｍｏｌ／Ｌ、温度３０～９０℃。所得结果归纳如下含少量Ｈ＿２Ｏ＿２的稀Ｈ＿２ＳＯ＿４可于室温快速从锰结核中提取Ｎｉ、Ｃｏ、Ｃｕ和Ｍｎ，金属的提取率依赖于Ｈ＿２ＳＯ＿４和Ｈ＿２Ｏ＿２的浓度，缺少任何一种都不可能得到满意效果。该方法与以往的浸出工艺不同，金属的提取率随温度升高而下降。最佳条件下，各金属的提取不如下：Ｍｉ１００％、Ｃｏ９５％、Ｃｕ１００％、Ｍｎ１００％、Ｆｅ６０％。     

镍－PAN极谱络合吸附波的研究

在含有５０％乙醇,２０×ｌ０￣－５ｍｏｌ／Ｌ１－（２－吡啶偶氮）－２－萘酚（ＰＡＮ）的０．１ｍｏｌ／ＬＮＨ＿４Ａｃ缓冲溶液（ｐＨ７．２）中,Ｎｉ（Ⅱ）－ＰＡＮ络合物在单扫示波极谱仪上产生一灵敏的导数极谱波,峰电位在－０．６５ｖ（ｖｓＳＣＥ）,峰电流与Ｎｉ（Ⅱ）浓度在３．０×１Ｏ￣－９～４．０×１０￣－６ｍｏｌ／Ｌ范围内呈线性关系,检测限达２×１Ｏ￣－９ｍｏｌ／Ｌ。机理研究表明,峰电流是由吸附在电极表面的络合物中的ＰＡＮ经不可逆还原而产生的。方法已应用于钢中镍的测定,结果满意。     

铁素体—珠光体钢组织和性能关系

本文对含０．０６５％￣０．２２％Ｃ、０．００２￣０．０２１％Ｓ、０．６￣１．５％Ｍｎ、０．０２￣０．４％Ｓｉ（重量百分数）系列钢（普通Ｃ－Ｍｎ、Ｃ－Ｍｎ－Ａｌ、Ｃ－Ｍｎ－Ｎｂ－Ａｌ钢）进行了研究，大多数此类钢经常化处理，以８００￣４００℃的平均冷却速率在４０￣０．８Ｋｍｉｎ＾－１变化。这相当于１２￣５００ｍｍ厚板在空气中冷却的速率。一些高温奥氏体化处理随后炉冷的钢产生粗铁素体晶粒和粗晶界碳化物。得     

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.