Metals are extracted from ores which exist in the form of oxides or sulphides, by treating the ore with hydrogen fluoride and/or fluorosilicic acid. There are two preferred forms. When hydrogen fluoride is used, the ore is initially crushed, dried and then contacted with HF gas at ...
Process for extraction of metal from an ore or concentrate containing nickel and/or cobalt A process for the extraction of metal from an ore or concentrate which contains nickel and/or cobalt values and other metals, comprises subjecting the ore or concentrate to acid leaching under pressure at...
What is the main difference in the constituents of bell metal and bras... 01:55 What are the different methods to obtain concentrated ores? 01:52 Describe the different steps involved in the extraction of metals from... 02:19Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solut...
als from their ores Apparatus for the extraction of metals from their oresApparatus for the extraction of metals from their oresdoi:US901611 AWILLIAM E. GREENAWALTUSUS901611 * Mar 30, 1908 Oct 20, 1908 William E Greenawalt Apparatus for the extraction of metals from their ores....
Recovery of metal values from metal-containing wastes and low-grade ores is important in reducing consumption of metals from primary sources. The potential for ionic liquids (ILs) to be used to recover valuable constituents from waste by... AC Gooding - 《Imperial College London》 被引量: 0发...
Process for extraction of platinum group metals from chromite- bearing ore A process for treating chromite-bearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and non-magnetic fractions; the non- magnetic fraction, contain...
of precipitation at a pH of around 5 to 6 to produce a Solid that contains no Metals nickel and Cobalt containing solution and a resulting valueRes of cobalt and nickel and \/ or subjecting the resulting solution to a second stage of precipitation at a pH of about 7 to 8, to produce...
Improved hydrometallurgical method for the extraction of nickel from laterite ores Such reagents are of potential application in new systems, such as hydrometallurgical processes for the recovery of metals from complex sulphide ores based ... M Rodriguez 被引量: 2发表: 2008年 Development of an Innov...
Technology for the extraction of rare and radioactive metals from ores without environmental pollutionPractical/ fission reactor fuel preparation and reprocessing/ autoclave processesradioactive metalsprocess oreshydrometallurgical operationsreagent consumption...
Under the optimum condition,95% of Ni,98% of Cu,and 88% of Co were recovered. In addition,the removal of iron was studied in the water leaching stage. The results demonstrate that this process provides an effective approach for extracting multiple metals from complex concentrates or ores. ...