Tuesday, August 23, 2011

Research & Engineering Co for Non ferrous Metals Site

       
 Since its establishment in 1968, research and Engineering Company for non ferrous metals has contributed in many exploitations, and consultations for the design of non ferrous metals production plant projects in Iran.      
Relying on mostly on its 40 years of experience and also its expert staff witch have been appeared from lead and zinc industry, our company now has become one of the most well equipped and experienced research and consultation companies in the middle East.                                                                                                                  With support of Iranian zinc mine development sister companies as main organizer and investor, we have commenced our wide range of activities in research and technology. in our reestablishment in 2006, the rich experiences of the past that have been mutually joined the highly trained young professional human resources with resolution and belief of lead and zinc industry managers aiming higher goals of promising future.

Wednesday, June 22, 2011

A review on hydrometallurgical extraction and recovery of cadmium from various resources

M. Sadegh Safarzadeh a,b,*, M.S. Bafghi a, D. Moradkhani b,c, M. Ojaghi Ilkhchi
 
a Department of Materials and Metallurgical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, b IranR&D Center, Iran Zinc Mines Development Company, Zanjan, c IranFaculty of Engineering, Zanjan University, Zanjan,d IranFaculty of Materials Engineering, Sahand University of Technology, Tabriz, Iran
2006 Elsevier Ltd. All rights reserved.Keywords: Hydrometallurgy; Cadmium recovery; Leaching; Cementation; Solvent extraction
a
Abstract

Cadmium is a toxic metal, which is primarily produced as a by-product from mining, smelting and refining of sulphide ore concentrates of zinc. Secondary cadmium is recovered from spent Ni–Cd batteries. Some cadmium is also recovered from zinc sinter plant fume, EAF dust, cadmium containing alloys, cadmium containing fluorescent materials, etc. In all cases cadmium is associated with some other impurities depending on the source. The hydrometallurgical processing is very effective for treating such materials because it can control the different levels of impurities. The most common lixiviant used to dissolve the desired metals is sulphuric acid. In the present paper, the hydrometallurgical processes have been described for the recovery of cadmium from various resources using sulphuric acid as the main lixiviant. The leach solution obtained has been purified using cementation or solvent extraction methods. The metal is then produced from the purified solution by electrowinning or precipitation with zinc dust and melting.

Wednesday, March 16, 2011

Hello ladies and gentlemen

We are in Iran. We will be happy to improve this field of engineering in the world.
See you soon.