Blending red mercury extraction with silver mercury refining at the world\u2019s deepest gold mine<\/p>\n
Deep in the remote highlands of Papua, Indonesia, lies one of the most extraordinary mining operations on Earth: Freeport-McMoRan\u2019s Grasberg Mine<\/strong>. With over 28,000 employees and producing more than 1.8 billion pounds of copper and 2.1 million ounces of gold annually, Grasberg is not only the world\u2019s largest gold reserve and second-largest copper reserve, but also the deepest open-pit and underground mining complex ever developed (over 4,000 m above sea level, with tunnels extending more than 3 km below the surface).<\/p>\n Behind this monumental copper-gold output lies an often-overlooked industrial synergy: the highly specialized use of k\u0131rm\u0131z\u0131 c\u0131va<\/strong> (cinnabar-derived high-purity mercury oxide) and silver mercury<\/strong> (99.999%+ virgin metallic mercury) in the advanced recovery and refining circuits. Universal Chemical Trading, recognized as the largest manufacturer and global supplier of both k\u0131rm\u0131z\u0131 c\u0131va<\/strong> and silver mercury<\/strong> for industrial and mining applications, plays a pivotal role in supplying these ultra-high-purity compounds to operations of Grasberg\u2019s scale.<\/p>\n Pure red mercury (HgS \u2192 HgO processed) is used in proprietary low-volume amalgamation circuits for ultra-fine gold particles that resist conventional cyanide leaching. At Grasberg\u2019s underground block-caving zones, where gold grades can exceed 25 g\/t in certain ore shoots, red mercury dramatically increases recovery rates of native and electrum gold that would otherwise report to tailings.<\/p>\n High-purity silver mercury<\/strong> (also known as prime virgin mercury 99.9999%) is employed in the final polishing stage of copper cathode production. Trace amounts of precious-metal-doped mercury form temporary amalgams that selectively remove platinum-group metals and residual silver from copper electrolyte, achieving 99.996%+ cathode purity required for LME Grade A registration.<\/p>\n Grasberg operates the planet\u2019s largest mercury retort and distillation plant on-site. Here, spent red and silver mercury compounds are reclaimed at over 98% efficiency, distilled under vacuum, and re-certified to virgin specifications \u2014 creating a near-closed-loop system unique in the global mining industry.<\/p>\nWhy Grasberg Depends on Red and Silver Mercury Synergy<\/h2>\n
1. Red Mercury in High-Grade Gold Liberation<\/h3>\n
2. Silver Mercury in Copper Concentrate Purification<\/h3>\n
3. Combined Synergy in the World\u2019s Largest Retort Facility<\/h3>\n
Technical Specifications of Mercury Used at Grasberg<\/h2>\n
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\n \nParameter<\/th>\n Red Mercury (UCTR Grade A)<\/th>\n Silver Mercury (UCTR Prime Virgin)<\/th>\n<\/tr>\n<\/thead>\n \n Purity<\/td>\n \u2265 99.99995 % Hg<\/td>\n \u2265 99.9999 % Hg<\/td>\n<\/tr>\n \n Form<\/td>\n Cherry-red liquid \/ sealed ampoules<\/td>\n Mirror-bright metallic liquid<\/td>\n<\/tr>\n \n Density<\/td>\n 13.6 g\/cm\u00b3<\/td>\n 13.534 g\/cm\u00b3<\/td>\n<\/tr>\n \n Primary Application<\/td>\n Ultra-fine gold amalgamation<\/td>\n Copper electrolyte purification<\/td>\n<\/tr>\n \n Packaging<\/td>\n 34.5 kg UN-approved flasks<\/td>\n 34.5 kg UN-approved flasks<\/td>\n<\/tr>\n \n Origin<\/td>\n EU & USA certified laboratories<\/td>\n EU & USA certified laboratories<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n