{"id":6949,"date":"2026-09-04T11:52:07","date_gmt":"2026-09-04T03:52:07","guid":{"rendered":"https:\/\/www.huameicarbon.com\/?p=6949"},"modified":"2026-09-04T17:20:04","modified_gmt":"2026-09-04T09:20:04","slug":"norit-ro-3515-alternative-hmgold-7500-specs-compared","status":"publish","type":"post","link":"https:\/\/www.huameicarbon.com\/fr\/norit-ro-3515-alternative-hmgold-7500-specs-compared\/","title":{"rendered":"Norit RO 3515 Alternative Activated Carbon: Specs Compared"},"content":{"rendered":"

Norit RO 3515 has been the default gold recovery carbon in CIL\/CIP circuits for decades. If you've worked in gold mining in South Africa, West Africa, or Australia, chances are RO 3515 was the first carbon your plant loaded \u2014 and possibly the only one your metallurgist ever approved.<\/p>\n

That market position was earned. NORIT built RO 3515's reputation through long-standing use in gold recovery applications and a global supply network. But an established brand is not automatically the best fit for every circuit. Today, mines may also evaluate alternative carbons based on gold adsorption performance, attrition resistance, supply availability, and total operating cost.<\/p>\n

\"Coconut<\/p>\n

This article compares RO 3515 against HMGOLD\u21227500<\/a> from Huamei Carbon \u2014 spec by spec, using Norit's published product data and Huamei's SGS test results (Report No. MSRCZ2500346-01A). Where the numbers speak, we let them. Where they don't, we say what's missing.<\/p>\n

Spec Sheet: Head-to-Head<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Param\u00e8tres<\/th>\nNorit RO 3515<\/th>\nHuamei HMGOLD\u21227500<\/th>\nNotes<\/th>\n<\/tr>\n
Raw material<\/strong><\/td>\nCoconut shell<\/td>\nCoconut shell<\/a><\/td>\nSame<\/td>\n<\/tr>\n
Activation<\/strong><\/td>\nSteam<\/td>\nSteam<\/td>\nSame<\/td>\n<\/tr>\n
Indice d'iode<\/strong><\/td>\n\u22651050 mg\/g<\/td>\n1150 mg\/g (spec) \/<\/p>\n

1208 mg\/g (SGS actual)<\/td>\n

\u2705 HMGOLD higher<\/td>\n<\/tr>\n
Teneur en cendres<\/strong><\/td>\n\u22645%<\/td>\n2.52% (SGS)<\/td>\n\u2705 HMGOLD<\/p>\n

significantly lower<\/td>\n<\/tr>\n

Humidit\u00e9<\/strong><\/td>\n\u22645%<\/td>\n\u22645%<\/td>\nMatch<\/td>\n<\/tr>\n
Ball-pan hardness<\/strong><\/td>\n\u226597% (ASTM D3802<\/a>)<\/td>\n98.2% (GB\/T<\/p>\n

method, SGS)<\/td>\n

\u26a0\ufe0f Different test methods<\/td>\n<\/tr>\n
K value (gold loading)<\/strong><\/td>\nNot typically published<\/td>\n28 kg\/t<\/td>\nHMGOLD published<\/td>\n<\/tr>\n
R value (adsorption kinetics)<\/strong><\/td>\nNot typically published<\/td>\n58%<\/td>\nHMGOLD published<\/td>\n<\/tr>\n
Densit\u00e9 apparente<\/strong><\/td>\n0.46\u20130.50 g\/cm\u00b3<\/td>\n0.48\u20130.52 g\/cm\u00b3<\/td>\nComparable range<\/td>\n<\/tr>\n
Taille des mailles<\/strong><\/td>\n6\u00d712<\/td>\n6\u00d712, 8\u00d716<\/a><\/td>\nHMGOLD offers<\/p>\n

more options<\/td>\n<\/tr>\n

pH<\/strong><\/td>\nAlkaline<\/td>\n10.0 (SGS)<\/td>\nBoth alkaline<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

One thing jumps out immediately: The first thing to note is that RO 3515 and HMGOLD\u21227500 are not identical product forms. RO 3515 is an extruded activated carbon, while HMGOLD\u21227500 is a coconut-shell granular carbon. HMGOLD shows strong iodine, ash, and hardness results in Huamei's SGS testing, but these values alone do not prove superior gold-recovery performance. Gold-specific adsorption and attrition tests under comparable conditions are more meaningful when evaluating an alternative.Iodine is 100+ mg\/g higher. Ash is half. The real question is whether those spec-sheet advantages translate to performance advantages in your specific circuit \u2014 and that requires testing, not assumptions.<\/p>\n

Why RO 3515 Became the Default<\/h2>\n

Understanding why mines use RO 3515 helps you evaluate whether switching makes sense:<\/p>\n

Track record:<\/strong> RO 3515 has a long history of use in gold recovery and is widely recognized in CIL\/CIP applications. Its established operating history is an important advantage for mines that prefer proven products with existing plant experience and internal approval records.<\/p>\n

Consistency:<\/strong> Norit's manufacturing process delivered batch-to-batch consistency that mines relied on. When you ordered RO 3515, you got RO 3515 \u2014 the carbon performed within predictable bounds every time.<\/p>\n

Distribution reach:<\/strong> From Johannesburg to Perth to Accra, Norit distributors could deliver. In regions where logistics are the bottleneck, having a reliable supply chain matters as much as the spec sheet.<\/p>\n

Inertia:<\/strong> This is the honest one. Many mines run RO 3515 because they've always run RO 3515. The metallurgist who approved it may have retired. The procurement team reorders on autopilot. Nobody has run a comparative trial in years \u2014 because why would you change something that works?<\/p>\n

That last point is the opening for HMGOLD. \"Works\" and \"optimal\" are different things. If you're paying a premium for a carbon that meets your minimum performance requirements, a lower-cost carbon that matches or exceeds those same requirements is worth evaluating.<\/p>\n

Where HMGOLD\u21227500 Has the Edge<\/h2>\n

Num\u00e9ro d'iode<\/h3>\n