我们判断黄金和白银依然处于下跌通道之中。美元指数在持稳于80.50美元过后，市场重回81上方。短期如能站稳81.50，下半年回升至83，进而指向86的概率就将上升。由此将对黄金和白银造成负面影响。

2月份，中国制造业PMI为50.1%，环比回落0.3个百分点，但连续5个月保持在50%以上，显示出我国宏观经济运行在企稳期间；全球制造业PMI 为50.8%，环比回落0.7个百分点，连续三个月运行在50%以上，意味着全球制造业经济仍保持增长势头，但增速有所放缓。在此背景下，1-2月份生产资料流通规模保持较快增长，增速小幅回落；供需增速延续升势，但供需矛盾再度出现；市场价格保持小幅回升态势，企业经营效益略有好转但仍不乐观，需求相对偏弱、成本快速增长等问题不容忽视。

The downturn or slow recovery of the global economy had an adverse impact on the demand in the international market. In addition, the slow growth of China's economy, coupled with the structural adjustment of domestic copper products, ensures that most of the domestic products of different qualities and varieties can replace the imports. Therefore, both the imports and exports of copper products in 2012 showed a year-on-year decline, except the exports of copper wire and copper foil. Besides copper pipe and pipe fitting, copper powder became another product that achieved net export. On the whole, the export momentum remains strong than the import momentum. The exports in the second half of the year were larger than those in the first half of the year. The annual imports totaled 668,500 tons, a year-on-year decline of 14.48%. The annual exports totaled 493,100 tons, a slight decline of l. 45%.

Aluminum sheet & strip products are one of the major product varieties in the aluminum processing industry, they also provide indispensable basic materials for the development of national economy. In recent years, driven by rapid economic growth, China’s investment in aluminum sheet & strip industry continued to expand, aluminum sheet & strip consumption maintained steady growth. The demand from exterior wall building and interior decoration,aluminum foil manufacture, printing, PS plate,manufacture, household electric appliances,and food packaging sectors experienced further increase, which becomes the main power propelling the growth in the consumption of aluminum sheet & strip products; meanwhile,transportation industry is becoming a new consumption growth point.

世界经济进入深度调整期，整体复苏艰难曲折。但伴随第三次工业革命兴起，新技术、新能源、新材料的广泛应用，以及信息网络、生物医药、绿色循环经济等的蓬勃发展，世界经济将呈现美好的发展前景，也将为锡工业带来巨大发展空间。

4月份，国内宏观经济运行稳中偏弱，经济回稳的基础仍不稳固。国际上，世界经济复苏缓慢、回升势头减弱，但有改善迹象。在此背景下，生产资料市场需求增势减缓；市场价格跌幅扩大，企业效益不容乐观。从后期走势看，中国制造业PMI 和全球制造业PMI 均现回落，预示着宏观经济企稳回升的基础不稳；但同时，政策上已将保增长放在了更加重要的位置，基建投资有望加快；新开工项目计划总投资和到位资金增速较一季度小幅回升。这些因素都有利于提振生产资料市场需求，市场价格有望趋稳。

The China’s import & export data of the electronic copper foil industry in recent years is a microcosm of the current development situation of the industry, which may help us gain a deeper understanding of product level, competitive strength, technological and management level as well as national foreign trade policies of the industry.China now has become the largest copper foil producer and consumer in the world, thus seeing a high growth tendency in terms of copper foil import value in recent years. It also indicates that the demand of China’s copper-clad plate manufacturing industry and printed circuit manufacturing industry for electronic copper foils is still growing.

3月份，伴随着天气转暖、节假日因素扰动减弱，经济运行进入正常的生产建设季节，国内生产资料需求有所启动，整体上生产资料市场平稳运行；但由于生产回升快于需求，部分产品库存增加、供需矛盾加重，市场价格再次转跌。从后期走势看，中国制造业PMI 连续6个月保持在50%—51%之间，全球制造业PMI连续四个月运行在50%以上，二季度生产资料市场面临的宏观经济形势较一季度将有所好转。全国固定资产投资保持较快增长、新开工项目加快，非制造业PMI中建筑业业务活动预期指数回升明显，反映出后期基础建设投资仍将保持较快增长，这些因素将有利于稳定生产资料市场需求。但受产能过剩制约，加之流通商补库积极性不高，市场价格上涨动能不足，二季度将呈现小幅波动走势；而上半年，累计平均价格将低于去年同期水平，同比下降4%左右。

According to statistics from the General Administration of Customs of the PRC, the imports of China's non-ferrous metal products (excluding chemical and Ferroalloy products) totaled $113.988 billion in 2012, a year-on-year decline of 1.59%. The export totaled $70.556 billion, a year-on-year increase of 34.10%. The trade deficit was $43.432 billion in 2012, a year-on-year decline of $ 19.781 billion (or 31.29%).

采用力学性能、电导率、剥落腐蚀试验及透射电镜组织观察,研究了Al-5.8Zn -2.1Mg - 1.7Cu合金挤压材时效工艺对其组织和性能的影响.结果表明:一级时效对挤压型材性能影响不大；型材力学性能随二级时效温度和时间的增加而明显降低,电导率和抗蚀性能明显提高.105℃ 10h+ 170℃(16 ～ 18)h时效的型材力学性能、电导率和抗蚀性能达到合理匹配.

检索了热还原法炼镁领域中国专利申请,着重分析了热还原法炼镁专利技术的申请类型、申请量年度发展趋势、申请人地区分布、主要专利申请人和法律状态,并按金属热还原法、碳化物热还原法和炭热还原法的分类简要介绍了主要相关专利技术.

通过对废旧阴极内衬的分析,采用碱浸浮选法对其进行处理,回收其中的有用成分,将有害物质分解从而保护环境.碱浸过程中,通过对碱用量、温度、反应时间和液固比这些单因素的分析,确定了最佳反应条件.炭的纯度提高到83.61％,回收了Na3AlF6和NaF;浮选实验有效地分离了炭和电解质,最终炭的纯度达到95％,电解质纯度为98％；最后用漂白粉对实验废水进行处理,分解有害的氰化物并回收CaF2.

本文以拜耳法赤泥和工业磷酸为主要原料,用盐酸溶出拜耳法赤泥中的铝,来制备三聚磷酸铝.在制备工艺中,分别对拜耳法赤泥中铝的溶出和三聚磷酸铝的制备等相关参数进行了系统研究,得到了拜耳法赤泥制备三聚磷酸铝的最佳工艺参数.对产品进行测试分析,研究表明,按最佳工艺参数生产的三聚磷酸铝产品具有很好的防腐性能,且达到工业指标,并与工业氢氧化铝合成工艺进行比较表明,凝胶氢氧化铝合成工艺可以降低能耗、缩短周期.因此,该工艺具有非常好的环保意义和应用前景.

预焙阳极生阳极体积密度的高低对焙烧后阳极制品的质量有直接影响,本文就生产过程中出现的生阳极体积密度偏低情况进行深入分析,分别从原料、配料、混捏、成型等工序查找原因,并针对具体问题做出有效改进,从实施效果看,提高了生阳极体积密度,改善了阳极的某些性能.

利用NaHCO3溶液与铝酸钠溶液进行酸碱中和反应来制备拟薄水铝石,结合二氧化碳气体沉淀和酸碱中和法的特点,制备的产品具有孔径集中,粘结性能好,胶溶好,在稀酸溶液中形成高浓度的透明胶体的特性.可用于FCC作催化剂粘结剂,和涂敷用氧化铝以及高级纸张的涂料等.