Patent application number | Description | Published |
20150218669 | METHOD FOR LEACHING NICKEL, COBALT AND IRON FROM A NICKEL LATERITE ORE - We propose a method for leaching nickel, cobalt and iron from a nickel laterite ore, characterized in that the nickel laterite ore is brought into contact with a solution of sulphuric acid and urea mixture. In this way, there is provided a method for efficient recovery of nickel and cobalt from nickel laterite ores where leaching in sulphuric acid/urea mixture can be completed in about less than 1 hour. | 08-06-2015 |
20150225810 | IRON RECOVERY METHOD - A method for recovery of iron in the form of an iron oxide as useful product, such as hematite, from a leach solution obtained from leaching of a nickel laterite ore, is proposed which comprises an oxidation and a hydrolysis of a ferric sulphate and urea mix solution stemming from leaching of nickel laterite ores at a temperature of 60-100° C. | 08-13-2015 |
20150353375 | PROCESS FOR THE RECOVERY OF IRON AS HEMATITE AND OTHER METALLIC VALUES FROM A SULPHATE LEACH SOLUTION - We propose a method for recovering iron from ferric sulphate solutions, obtained from leaching of metal bearing materials with sulphuric acid to produce an iron bearing leach solution, in the form of oxide as a useful product by precipitation as hydroxide, by subsequent pressure oxidation, and then by calcining of the iron hydroxide. | 12-10-2015 |
20150361522 | METHOD OF PRECIPITATION OF IRON FROM LEACH SOLUTIONS - We propose a method of removing iron from leach solutions, obtained by leaching of metal bearing materials with acids, in the form of hydroxide and/or oxide by precipitation. The advantages with the method according to the invention include that the method can be performed at atmospheric pressure and at temperatures from ambient to boiling temperatures and that no gases are emitted. Another important advantage is, by prevention of gel formation of the iron precipitate, that solid/liquid separation becomes much easier and loss of valuable metals is minimized. | 12-17-2015 |