# MRD: Selectro Delivers 92% Aluminium Recovery from Bauxite Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/mrd-selectro-delivers-92-aluminium-recovery-from-bauxite--28b14e92-0a03-4daf-b496-ff0d24fd5790 Original source: https://www.asx.com.au/asx/v2/statistics/displayAnnouncement.do?display=pdf&idsId=03152790 Publisher: asx Original announcement: 2026-10-14T22:54:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-14T23:16:49.790Z Atlas analysis updated: 2026-10-14T23:16:49.790Z - Company: Mount Ridley Mines Limited - Ticker: MRD - Exchange: ASX - Region: Western Australia - Primary commodity: Aluminium - Secondary commodities: Iron ore - Document categories: Metallurgy - Extracted: 2026-10-14 23:16:50 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Mount Ridley Mines reported successful first third-party testing of its Selectro™ process on a bauxite composite from the Darling Range, Western Australia. The test achieved 92% aluminium and 97% iron recovery, producing a pH-neutral, silica-rich residue instead of conventional caustic red mud. Reasoning: The first third-party test of the Selectro™ process on bauxite yielded high recoveries and a more environmentally friendly residue, demonstrating significant technology expansion potential. - Positive factor: High recovery of aluminium \(92%\) and iron \(97%\) on a first pass basis - Positive factor: Demonstrates applicability of Selectro™ process beyond Grass Patch complex - Positive factor: Produces a pH-neutral, silica-rich residue instead of caustic red mud - Positive factor: Operates at significantly lower temperatures than the conventional Bayer process - Negative factor: Chemistry has not yet been optimised for bauxite feed - Negative factor: Results are on a first-pass basis Facts used in scoring: 2 ## Classification and evidence **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: Aluminium recovery of 91.9% and iron recovery of 96.7% are very high for a first-pass test. Evidence · table > 91.9% Context: Aluminium \(as Al2O3\) **Bench Scale Only** Polarity: negative Definition: Only preliminary bench tests completed — no locked-cycle or pilot work. Why it applies: The test was conducted on a 1 kg composite sample, which is bench-scale. Evidence · text > single composite of approximately 1 kg **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: the document describes a flotation route \("flotation"\) **Single Domain Only** Polarity: negative Definition: Testing limited to one composite or domain — representativeness not established. Why it applies: only one composite was tested ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Metallurgical Results (2) ### leach [Link to this fact](https://atlas-staging.minestarters.com/news/mrd-selectro-delivers-92-aluminium-recovery-from-bauxite--28b14e92-0a03-4daf-b496-ff0d24fd5790#fact-metallurgical-facts-0) Darling Range bauxite project · aluminium #### Identity - Project: Darling Range bauxite project - Commodity: aluminium - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Test Work - Program Status: preliminary - Test Type: leach - Processing Route: Selectro™ Process - Sample: composite bauxite sample from Darling Range bauxite project \(Athena and Ceres prospects\) #### Recovery - Recovery: 91.9 % - Recovery Basis: actual\_test - Head Grade: 41.9 - Head Grade Unit: % #### Lab - Laboratory: ALS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-14T00:00:00.000Z Reasoning: High recovery achieved on first pass with a new feedstock. - Positive factor: 91.9% recovery is strong for a first-pass, non-optimised test - Negative factor: Chemistry not yet optimised for this specific feed Evidence · table > 41.9% Context: Aluminium \(as Al2O3\) #### Tags used in scoring **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ### leach [Link to this fact](https://atlas-staging.minestarters.com/news/mrd-selectro-delivers-92-aluminium-recovery-from-bauxite--28b14e92-0a03-4daf-b496-ff0d24fd5790#fact-metallurgical-facts-1) Darling Range bauxite project · iron\_ore #### Identity - Project: Darling Range bauxite project - Commodity: iron\_ore - Region: australia\_wa - Reported Region: Western Australia - Ticker: MRD #### Test Work - Program Status: preliminary - Test Type: leach - Processing Route: Selectro™ Process - Sample: composite bauxite sample from Darling Range bauxite project \(Athena and Ceres prospects\) #### Recovery - Recovery: 96.7 % - Recovery Basis: actual\_test - Head Grade: 13.6 - Head Grade Unit: % #### Lab - Laboratory: ALS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-14T00:00:00.000Z Reasoning: Very high iron recovery demonstrated on first pass. - Positive factor: 96.7% recovery of iron is exceptional Evidence · table > 96.7% Context: Iron \(as Fe2O3\) #### Tags used in scoring **Byproduct Commodity** Polarity: neutral Definition: The tested commodity is a byproduct rather than the primary economic driver. Why it applies: the release describes a byproduct credit ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.