# Rockhaven Announces Improved Metallurgical Test Work Results on its Klaza Project, Yukon Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad Original source: https://money.tmx.com/en/quote/RK/news/5481264308661905/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec Publisher: tmx Original announcement: 2024-05-06T12:05:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Rockhaven Resources Ltd. - Ticker: RK - Exchange: TSX - Region: Yukon - Primary commodity: Gold - Secondary commodities: Silver, Lead, Zinc, Arsenic - Document categories: Metallurgy - Extracted: 2026-08-26 07:02:04 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Rockhaven has announced improved metallurgical test work results for the Klaza Project, demonstrating that a conventional flotation flowsheet can produce three marketable concentrates \(lead, zinc, and arsenopyrite\). This optimized approach eliminates the need for costly on-site pressure oxidation and includes successful dense media separation \(DMS\) pre-concentration results that could reduce operating costs and tailings management requirements. Reasoning: The results demonstrate a significant de-risking of the project by replacing expensive on-site hydrometallurgy with a simpler, conventional flotation flowsheet and adding a high-efficiency pre-concentration step. - Positive factor: Elimination of on-site pressure oxidation \(POX\) reduces CAPEX/OPEX - Positive factor: High recoveries achieved via conventional flotation - Positive factor: DMS pre-concentration offers significant cost and tailings benefits - Positive factor: Three marketable concentrates identified - Negative factor: Arsenic-rich concentrate attracts penalties/fees Facts used in scoring: 7 ## Classification and evidence **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: The results describe flotation and DMS processing routes. Evidence · text > conventional flotation **Refractory Ore** Polarity: negative Definition: Ore requires oxidation/pressure treatment before recovery — a processing and recovery risk. Why it applies: The release explicitly mentions refractory gold and the need for arsenopyrite concentrate to manage it. Evidence · text > Refractory Gold Flotation **High Recovery** Polarity: positive Definition: Recovery at or above the exceptional band for the commodity and processing route. Why it applies: DMS recoveries for gold are exceptionally high \(up to 99%\). Evidence · table > 99.0 Context: 32 ## Extracted facts Stored fact records: 7. Some facts used in scoring do not have a stored record. ## Metallurgical Results (7) ### Fact 1 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-0) gold #### Identity - Commodity: gold - Ticker: RK #### Test Work - Sample: MC-1 Lead concentrate #### Recovery - Recovery: 32 % - Recovery Basis: actual\_test - Conc. Grade: 210 - Conc. Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: High-grade gold in lead concentrate. Evidence · table > 210 Context: 0.9 ### Fact 2 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-1) silver #### Identity - Commodity: silver - Ticker: RK #### Test Work - Sample: MC-1 Lead concentrate #### Recovery - Recovery: 57 % - Recovery Basis: actual\_test - Conc. Grade: 4997 - Conc. Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: High silver credits in lead concentrate. Evidence · table > 4,997 Context: 0.9 ### Fact 3 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-2) lead #### Identity - Commodity: lead - Ticker: RK #### Test Work - Sample: MC-1 Lead concentrate #### Recovery - Recovery: 83 % - Recovery Basis: actual\_test - Conc. Grade: 61.6 - Conc. Grade Unit: % #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: Strong lead grade in concentrate. Evidence · table > 61.6 Context: 0.9 ### Fact 4 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-3) gold #### Identity - Commodity: gold - Ticker: RK #### Test Work - Sample: MC-1 Arsenopyrite concentrate #### Recovery - Recovery: 44 % - Recovery Basis: actual\_test - Conc. Grade: 112 - Conc. Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: High grade gold in arsenopyrite concentrate, though arsenic content is a penalty factor. - Positive factor: High grade concentrate - Negative factor: Arsenic penalties Evidence · table > 112 Context: 2.2 ### Fact 5 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-4) gold #### Identity - Commodity: gold - Ticker: RK #### Test Work - Sample: Western BRX DMS #### Recovery - Recovery: 99 % - Recovery Basis: actual\_test - Head Grade: 7.9 - Head Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: Very high gold recovery via DMS. - Positive factor: Exceptional recovery Evidence · table > 99.0 Context: 32 ### Fact 6 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-5) gold #### Identity - Commodity: gold - Ticker: RK #### Test Work - Sample: Central Klaza DMS #### Recovery - Recovery: 97.7 % - Recovery Basis: actual\_test - Head Grade: 5 - Head Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: Strong gold recovery via DMS. - Positive factor: Strong recovery Evidence · table > 97.7 Context: 38 ### Fact 7 [Link to this fact](https://atlas-staging.minestarters.com/news/rockhaven-announces-improved-metallurgical-test-work-results-on-its-klaza-projec--bf95e9d9-615e-4225-b44f-1fe40f91ecad#fact-metallurgical-facts-6) gold #### Identity - Commodity: gold - Ticker: RK #### Test Work - Sample: Western Klaza DMS #### Recovery - Recovery: 78.9 % - Recovery Basis: actual\_test - Head Grade: 1.7 - Head Grade Unit: g/t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2024-05-06T00:00:00.000Z Reasoning: Moderate gold recovery in Western Klaza zone. - Negative factor: Lower recovery compared to other zones Evidence · table > 78.9 Context: 11 ## 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.