In water treatment the main processes used are demineralization, softening, ion exchange, gravity and pressure filtration. Trislot wedge wire screens are used in these processes to collect or distribute the treated liquid, to retain the treatment media, to filter solids. The main advantages compared to perforated plate, wire mesh or other filtration media are: high efficiency, long service life, flexible design, low maintenance.
By Trislot N.V. based in Waregem, BELGIUM.
Cyanidation is still the most widely used method to leach gold, using sodium or calcium cyanide as lixiviant. An anionic gold-cyanide complex is formed that is extractable by basic resins. Other metals present in the ore, such as silver and base metals ( copper, nickel, cobalt, zinc, iron, etc. ) are also leached in cyanide media. Selective ion exchange resins are designed to preferentially adsorb the mono-valent gold-cyanide species.
By PuriTech Ltd based in Herentals, BELGIUM.
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