微波合成钼酸钠的研究

探讨了微波合成钼酸钠的新工艺。实验结果表明:影响微波合成的主要因素为物料重量,其次为合成时间和微波功率;在实验范围内的最佳条件为微波功率560W、合成时间20min、物料重量5g;在实验最佳条件钼酸钠的合成率为99 97%,采用X衍射进行产品物相分析。     

微波辐射法干燥仲钼酸铵新工艺

研究了利用微波干燥仲钼酸铵的新工艺 ,试验结果表明 :经微波干燥 90s ,仲钼酸铵的脱水率为 99.98% ,并通过实验得出微波干燥的主要因素为干燥时间 ,其次为物料重量和微波功率。在本实验范围内的最佳条件为微波功率 5 2 5W、干燥时间 90s、物料重量 15 g。     

微波辐射法干燥锡酸钠新工艺

研究了利用微波辐射干燥锡酸钠的新工艺，并对影响锡酸钠脱水率的微波功率、微波辐射时间、物料重量、物料厚度等各种因素进行了分析和讨论。实验结果表明利用微波辐射干燥锡酸钠新工艺是可行的，且微波干燥锡酸钠的脱水率与干燥的物料重量、辐射时间、微波功率和物料厚度等因素有关。     

微波在制备ZAO纳米粉体中的应用

研究了用微波技术制备纳米ZAO粉体的方法以及在微波干燥过程中微波功率和辐射时间等工艺参数对粉体的影响,用TG-DSC对ZAO粉的前驱体进行温度制度的确定.实验结果表明:微波干燥功率700 W,微波辐射时间10 min,煅烧温度550～650℃为佳.     

微波焙烧预处理从白云鄂博矿中浸出钪的实验研究

以白云鄂博矿经超导磁选之后的选铌尾矿作为实验原料,采用先微波焙烧后盐酸浸出的工艺,探究微波焙烧功率、时间、浸出温度、盐酸浓度以及液固比等对浸出钪的影响,确定浸出钪的工艺条件.实验结果表明,在微波功率560 W、微波焙烧时间18 min、浸出温度150℃、盐酸浓度10 mol/L、物料粒度400目占比70％、液固比4:1...     

微波加热法制备SrFeO3光催化材料的研究

提出了一种新的制备SrFeO3光催化材料的方法,微波加热法。实验确定其最佳制备条件为：微波功率560W,微波加热时间30min,煅烧温度700℃和煅烧时间5h;对在该条件下制备的催化剂进行了XRD表征。在可见光条件下,以模拟染料酸性大红废水为目标物,对催化材料的光催化性能进行了研究,结果表明微波加热法制备的光催化材料具有较高的光催化降解性能,染料降解率最高可达93．4％。     

响应曲面法优化微波干燥碳酸稀土的实验研究

采用中心组合设计(CCRD),三因素五水平响应曲面法(RSM),研究了微波功率、干燥时间和物料厚度间的交互作用对碳酸稀土脱除吸附水的影响,模拟得到二次多项式回归方程的预测模型。结果表明:物料厚度一定,脱水率随微波功率和干燥时间的增大而增加;微波功率一定,脱水率随物料厚度增加而降低,优化的最佳工艺参数为:微波功率800 W,干燥时间12 min,物料厚度2 cm,脱水率98.88%,实际测得97.69%,相对误差为1.31%。红外光谱(FT-IR)分析表明微波干燥后碳酸稀土不再含有吸附水;粒度分析表明微波干燥后的碳酸稀土具有粒度细和分布均匀的特点。     

微波法快速测定钼酸铵中的水分

采用微波加热法对钼酸铵水分含量进行了测定。探讨了加热时间、微波功率和物料重量对水分测定的影响，并和传统烘箱测定进行了对比。     

微波超声波法对仲钨酸铵蒸发结晶的影响

研究了微波超声波联合作用对制取仲钨酸铵晶体的影响,探讨了微波超声波对仲钨酸铵的晶型、粒度的影响。实验表明微波超声波制得的仲钨酸铵晶体表面更光滑,粒度更细更均匀。微波超声波没有改变仲钨酸铵的晶型,并且所得到的晶体d值与文献吻合的更好,表明微波超声波有利于仲钨酸铵晶体的制备。     

仲钨酸铵煅烧温度对金属W粉性能的影响

为研究仲钨酸铵煅烧温度对金属W粉性能的影响,在不同的相变温度下煅烧仲钨酸铵获得煅烧产物,在还原炉中还原成W粉。用扫描电镜(SEM)对不同W粉显微形貌进行观察和分析,用激光粒度分析仪对还原后的W粉进行粒度分布分析。结果表明:仲钨酸铵煅烧温度对金属W粉的性能有显著的影响,在425℃的温度下获得的煅烧产物所生产的W粉具有粒度均匀、分散性好的特点。     

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.