共搜索到478条信息，每页显示10条信息，共48页。用时：0小时0分0秒500毫秒
;types of the one-dimensional metal nanomaterials were described, such as gold, silver, copper, iron, tin, tungsten and palladium. Two preparation methods of the one... [J]. New Journal of Chemistry, 2003, 7: 1029-1031. [51] KIM K, KIM M, CHO S M. Pulsed electrodeposition of palladium nanowire arrays using AAO template [J]. Materials Chemistry and Physics, 2006, 96......
of Material Science and Engineering, Beijing University of Technology, Beijing 100124, China) Abstract: The sponge gold was obtained by using "breaking-removing low priced metal with sulfuric acid... extraction rate can reach as high as 96.1%. At last, the organic phase is stripped with solution of oxalic acid (5%) to get sponge gold. Key words: Au; methyl isobutyl ketone; factorial design; waste......
which still has some absorbing ability. The higher degree of the pre-reduced pellet, the higher the sponge iron metallization is. The mass ratio of C to O is 1.75:1, reduction time is 48 min, the degree of the pre-reduced pellet is 42.85%, and the sponge iron metallization is 97.29% at 1 000 ℃. With the reaction of the direct reduction, the content of iron oxides changes. Iron granules disperse......
resources of platinum group metals[J]. Precious Metals, 2011, 32(1): 76-82. [12] REDDY B R, RAJU B, LEE J Y, PARK H K. Process for the separation and recovery of palladium and platinum from spent automobile... type. It can be seen from the copper-platinum group metals phase diagrams that copper can form the continuous solid solution with platinum palladium and rhodium. The feasibility of recovering platinum......
, Guangzhou 510640, China)Abstract:A new style Ni-containing alumina ceramic foam based continuous three-dimensional interconnected skeleton was prepared by impregnating a polymeric sponge with aqueous......
be easily recovered to produce sponge iron, realizing complete detoxication and zero-emission of chromium residue. Key words: carbon ferrochrome; potassium chromate; two-stage roasting; chromium... an oxidizing roasting process has been proposed. The residue emitted from this process was very little, and it mainly consisted of iron oxides, which could be easily recovered to produce sponge iron......
and optimizing the catalyst preparation.Based on a villiform spherical TiO2 with the largest specific surface area in our experiments,we prepared a set of catalysts with various loading amounts of palladium......
to a decrease of the Ce-O bond strength. Pd-Ce synergism affects the reduction behavior of the catalysts. The TPR results show that the CeO2 addition lowers the reduction temperature of PdO, while palladium......
清洁生产精镉的新工艺浦恩彬1,戴卫平2,王海北3(1.云南省曲靖市云南黄金矿业集团股份有限公司2.昆明理工大学,昆明 6500933.北京矿冶研究总院,北京 100044)摘 要:介绍从海绵镉到精镉的一种清洁生产新工艺,阐述该工艺的技术特点:一是用氮气作为保护气体,实现粗镉,精镉的无氧浇铸;二是使用真空蒸馏技术,环保,低碳;三是收尘采用先进技术,烟尘排放量小于5 mg/m3.关键词:精镉生产； 无氧浇铸； 真空精馏； 塑烧板技术......
从含高铜铅氰化金泥中提取金,银,铜,铅全湿法工艺胡宪1(1.辽宁省丹东市辽宁地质工程职业学院)摘 要:根据试验结果,提出了一种从含高铜铅氰化金泥中提取Au,Ag,Cu,Pb全湿法工艺.该工艺在硫酸介质中加入一种除铜剂对氰化金泥进行预处理,除铜率达98%;预处理后的含金渣浸金,金浸出率达99.5%以上;用混合还原剂还原出的海绵金,经去杂处理,金的成色达到Au-2标准.关键词:含高铜铅氰化金泥； 全湿法工艺； 除铜； 金浸出率......
