Krstev, Boris (1999) Combined processing method of low- grade nickel bearing laterites. New trends in mineral processing.
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Abstract
In the meantime none of these progressed past the bench or pilot plant scale because of various technical, economic or environmental factors or problems. Nevertheless, the renewed interest in laterites in nineties has sprawned a number of new possibilities and hopefuls, as well as a revival of interest in some older ones.
The same is the interest and perspective of the segregation process. The previous investigations in the field of the metal compounds chlorination, esspecialy the chlorination of the refractory nickel minerals: garnierite and nontronite, by the chlorine, HCl or NaCl or CaCl2, were determined directions, confirming the perspective of the mentioned process for the treatment of the low grade and complex minerals-laterites. The principal scheme of the segregation process following by the classical concentration methods - flotation or magnetic separation and hydrometallurgical treatment - ammonia leaching is shown on the figure 1. The combined methods for enriching of the oxide-silicate nickel ores are these through which by heating the ore with coke and CaCl2 at high temperature metal nickel is formed on the present coke, or on the silicates which are the component parts of the ore. There are the following steps, as it's shown on the scheme: the formation of the HCl and H2; the chlorination of the Ni-ferite and Ni-silicates to Ni-chlorides, Fe-chlorides and the reaction of reduction to Ni-metal on the coke parts or quartz parts. The next steps are flotation, magnetic separation or ammonia leaching of the formed Ni-metal.
| Item Type: | Article |
|---|---|
| Subjects: | Engineering and Technology > Other engineering and technologies |
| Divisions: | Faculty of Natural and Technical Sciences |
| Depositing User: | Aleksandar Krstev |
| Date Deposited: | 27 Dec 2012 11:48 |
| Last Modified: | 27 Dec 2012 11:48 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/4646 |
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