微波辐射水蒸气法制备提金活性炭的研究

研究了以椰子壳为原料，采用微波辐射水蒸气法制备提金活性炭的可行性，探讨了活化时间、水蒸气流量及微波功率对活性炭碘吸附值和得率的影响。得到了微波辐射水蒸气法制备提金活性炭的较佳工艺条件：微波功率700W，活化时间5min，水蒸气流量4．8ml／min。制备的活性炭得率为传统方法的2倍左右，而加工时间只有传统方法的1／60左右。     

二氧化碳活化制备烟杆基颗粒活性炭的研究

进行了以烟杆废弃物为原料、木焦油为主的复合黏结剂、二氧化碳为活化剂制备颗粒活性炭的研究。系统地研究了活化温度、活化时间、二氧化碳流量等因素对烟杆基颗粒活性炭活化效果的影响，得到了该试验条件下最佳工艺条件：活化温度为900℃，活化时间为100min，二氧化碳流量为0．5L／min。该工艺条件下制备的颗粒活性炭碘吸附值为901．36mg／g，亚甲基蓝吸附值为80ml/g，活性炭得率为38.53％。同时，测定了该活性炭氮吸附，通过BET计算了活性炭的比表面积，并通过密度函数理论（DFT）表征了活性炭的孔结构。结果表明：制备的活性炭为微孔型，BET比表面积为947.81m^2／g，总孔容为0．48ml／g。     

物理活化法兰炭制备活性炭的试验研究

盛隆化工有限公司为获取低成本活性炭,试验用物理活化法制备活性炭。采用控制变量法确定最佳混合比和最佳成型压力,再用正交试验来考察碳化温度、活化时间、活化温度、二氧化碳用量4个因素对活性炭性能的影响。得出最佳工艺条件及技术参数:碳化温度450℃,活化温度900℃,活化时间1.5 h,二氧化碳用量400 mL/h。制得的活性炭产品碘吸附值为595.07 mg/g。     

粉煤灰浮选精炭制备活性炭吸附溶液中Cu2+

粉煤灰浮选得到的精炭具有灰分含量低（Ad=17.85%）、碳含量高（Cd=77.53%）的特点,是活性炭制备的廉价碳源。采用KOH活化法对浮选精炭进行活化,可以得到碘吸附值1 140.78 mg/g、亚甲基蓝吸附值140.00 mg/g、比表面积853.75 m2/g的优质活性炭,最佳的活化条件为：碱炭比3.0、活化温度800 ℃、活化时间60 min。红外光谱分析、BET比表面分析和扫描电子显微镜分析显示,制备的活性炭中含氧活性基团较多、孔隙发达,特别是2 nm以下的微孔丰富,微孔孔容占比48.30%,活性炭平均孔径2.33 nm。该活性炭对溶液中Cu2+的吸附性能良好,在投加量为2.5 g/L、pH=5.0、吸附温度25 ℃、吸附平衡时间120 min的条件下,初始浓度分别为50、75、100 mg/L时,Cu2+去除率分别达到99.70%、93.61%、81.67%。吸附机理分析表明,Cu2+在活性炭表面的吸附以化学吸附为主,符合Langmuir单分子层等温吸附模型。本研究为水处理用优质活性炭的低成本制备提供了一条新的技术途径。     

水蒸气活化对活性炭电吸附脱盐性能的影响

用硝酸对活性炭进行去灰分处理,并用水蒸气进行二次活化,将活性炭制成电极,在电吸附装置中进行电吸附测试.结果表明,二次活化可以提高活性炭的比表面积和孔容,并使得活性炭的单位吸附量从2.92 mg/g提高到4.55 mg/g.活化效果受活化时间和活化温度共同影响,活化1h的效果最好,提高活化温度有利于提高吸附性能.     

活性炭吸附法去除冶炼废水COD的研究

采用活性炭吸附法对株冶冶炼废水进行了COD去除研究,考察了pH值、反应时间、活性炭用量、反应温度对去除率的影响。结果表明：采用粉末活性炭为吸附剂,当pH值为8．5,搅拌时间为0．5h,活性炭用量为0．25g／L,温度为25℃时,COD去除率达到64．87％,出水COD约为20mg／L。     

乏风瓦斯分离富集用椰壳基活性炭的制备

以椰壳为原料、酚醛树脂为粘结剂及聚乙二醇（PEG）为造孔剂和分散剂,采用水蒸气活化制备活性炭,以所制备的活性炭为吸附剂,采用真空变压吸附法（VPSA）对乏风瓦斯进行分离富集.分别考察了不同活化条件对活性炭孔结构性能的影响,以及不同VPSA操作条件对乏风瓦斯富集效果的影响.结果表明:以酚醛树脂与粉体炭的质量比为0.5 g/g制备的成型炭作为炭质前驱体进行活化,在活化时间为5 h、通入水量为1.96 cm3/min和活化温度为825 ℃的条件下制备的活性炭,其对应的比表面积、微孔体积及微孔率分别达到795 m2/g、0.37 cm3/g和84.1%;并以该活性炭为吸附剂,在最佳操作条件下,乏风瓦斯（甲烷含量约0.5%）经富集后,产气中CH₄浓度和回收率分别为1.51%和96%.      

竹炭制备高比表面积活性炭及其电容性质研究

[目的]研究竹炭制备高比表面积活性炭及其电容性质.[方法]采用竹材加工剩余物制成的竹炭为原料,以氢氧化钾为活化剂制备了双电层电容器用活性炭,并通过正交试验研究了液固比、活化温度、活化时间及升温速率对产品吸附性能的影响.[结果]得到最优的活化工艺参数如下:碱炭比为4∶ 1,活化温度为770 ℃,活化时间为60 min,升温速率为10 ℃/min,比表面积高达2 379 m2/g,但其质量比电容不是最大.当比表面积为2 121 m2/g时,质量比电容最大(323 F/g),但其体积比电容偏小.[结论]为研制高比电容量且具有实际应用价值的电极材料提供了依据.     

烟杆活性炭的制备及其乙醇吸附特性研究

云南省作为全国最大的烟草种植省份,每年产生大量的烟草废弃物,其中以烟杆为主,用烟杆制备活性炭可以实现废弃物资源化利用。本研究以烟杆为试验原料,通过炭化——KOH活化制备活性炭,探索最佳制备工艺条件,分析了活性炭的结构特征及活化条件对炭孔结构的影响,同时研究了活性炭对乙醇吸附的吸附特性。试验表明,活化温度保持在700℃,KOH与炭化料之比为3的条件下制备的活性炭有较高的比表面积和总孔容,分别为1 256 m2/g和0.588 cm3/g,此时微孔孔容最大,可达0.470 cm3/g,样品表面呈现无定形碳结构,对乙醇的吸附最有利。乙醇吸附测试表明,最佳工艺条件下制得的活性炭对乙醇的平衡吸附容量最大,可达382.93mg/g,该活性炭在太阳能吸附制冷领域具有一定的应用前景。     

柚皮残渣制备活性炭对Cu2+吸附性能

以柚皮为材料,提取柚皮苷后残渣制备柚皮基活性炭（简称PPAB）,研究其在不同pH、投加量、吸附质浓度、时间、温度、粒径、解吸剂条件下对水中Cu2+的吸附性能.结果表明:在pH值为6,PPAB投加量4 g/L,溶液温度35 ℃,Cu2+初始浓度30 mg/L,吸附60 min,PPAB对Cu2+去除率94.47 %,最大吸附容量7.09 mg/g;0.25 mol/L盐酸脱附Cu2+效果较优,回收率98.21 %.吸附过程Langmuir等温式能较好拟合,此工艺下PPAB平均得率36.9 %,比表面积高达1 764 m2/g.柚皮基活性炭作为吸附剂处理低浓度重金属废水具有广阔前景.      

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.