- Project: Salave Gold Project in Asturias, Spain, developed by Black Dragon Gold Corp. (Technical Report: May 2025).
- Process Flow: Two-stage crushing (jaw + cone crusher) → ball mill grinding (target: 80% passing 75µm) → bulk sulphide flotation (rougher + cleaner stages).
- Key Reagents: Potassium amyl xanthate (PAX) collector, CuSO4 activator, and MIBC frother.
- Concentrate: Targets ±65 g/t Au, dewatered via thickener + pressure filter for transport.
- Tailings Management: Thickened tailings split between pastefill (cemented backfill for underground) and TSF storage (passivated with cement).
- Throughput: Assumes ROM blend of Upper Zone (pyrite-rich) and Lower Zone (arsenopyrite-rich) ore.
- Innovation: Simplified flotation circuit with no regrind, reducing operational complexity.
Technical report and processing history
The following archived source profiles have been consolidated here to preserve the project’s processing history and study context.
Salave Gold Project — 2025 Technical Report
Salave Gold Project — 2025 Technical Report
| Company | Black Dragon Gold Corp. |
| Date | 19 May 2025 |
| Region | Asturias, Spain |
| Commodities | Gold |
| Status | Development |
Executive Summary
This Preliminary Economic Assessment outlines the recovery methods for the Salave Gold Project located in Asturias, Spain. The report details a bulk sulphide flotation process adopted based on historical laboratory testing, which demonstrated commercially attractive gold grades in the concentrate. The flowsheet assumes a simple and robust comminution circuit involving two-stage crushing and screening followed by ball milling, as no specific comminution testing was performed for this assessment.
The processing circuit includes a rougher and cleaner flotation stage without regrind, utilizing potassium amyl xanthate (PAX) as a collector, CuSO4 as an activator, and MIBC as a frother. The concentrate is dewatered using a thickener and pressure filter before transport to the port at Aviles. Tailings management involves thickening and cementing a portion for use as pastefill underground, with the balance pumped to a tailings storage facility (TSF) after passivation.
The project remains in the development stage, with the flowsheet designed to handle blended Run-of-Mine (ROM) material from Upper Zone pyrite-rich and Lower Zone arsenopyrite-rich deposits. The process aims to produce concentrates meeting specifications of approximately 65 g/t Au.
Website: https://emcgold.com.au/
Report Date: 19 May 2025
Region: Asturias, Spain
Project Status: Development
Commodity: Gold
Throughput:
Mine Life:
Mine Type:
Ore type:
Salave Gold Project — 2025 Preliminary Economic Assessment
Salave Gold Project — 2025 Preliminary Economic Assessment
| Company | Black Dragon Gold Corp. |
| Date | 19 May 2025 |
| Region | Asturias, Spain |
Executive Summary
The Salave Gold Project is a gold development project located in Asturias, Spain. The Preliminary Economic Assessment (PEA) evaluates the potential for extracting gold from a polymetallic deposit containing pyrite-rich Upper Zone material and arsenopyrite-rich Lower Zone material. The project is proposed as an underground mining operation with ore transported to surface via a main ramp using 40-tonne articulated dump trucks.
The processing methodology adopted for this assessment is bulk sulphide flotation, which has been demonstrated through historical laboratory testing to produce concentrates with commercially attractive gold grades (±65 g/t Au). The flowsheet comprises two-stage crushing (jaw and cone), ball milling in closed circuit with hydrocyclones, rougher and cleaner flotation stages, and concentrate dewatering using a thickener and pressure filter. Tailings will be thickened and a portion cementite for use as pastefill underground, with the remainder pumped to the Tailings Storage Facility.
Key Parameters
- Commodity: Gold
- Mine Type: Underground
- Status: Development (PEA)
- Processing: Bulk Sulphide Flotation
- Crushing: Two-stage (Jaw + Cone), d80 = -10 mm
- Milling: Ball mill, 80% passing 75 µm
- Flotation: Rougher + Single Stage Cleaner
- Concentrate Grade: ±65 g/t Au
- Tailings Management: Pastefill underground + TSF
Processing Details
Comminution
ROM material is blended from Upper Zone (pyrite-rich) and Lower Zone (arsenopyrite-rich) zones prior to processing. The comminution circuit assumes two-stage crushing with screening, followed by ball milling in closed circuit with hydrocyclones. A nominal screen undersize d80 of -10 mm has been assumed for crushing, with milling targeting 80% passing 75 µm.
Flotation
Bulk sulphide flotation is employed using a rougher stage followed by a single stage of cleaning. Potassium amyl xanthate (PAX) is used as the sulphide collector, copper sulphate (CuSO4) as an activator, and methyl isobutyl carbinol (MIBC) as the frother. No regrind is included in the current design.
Concentrate Handling
Concentrate is dewatered using a conventional thickener followed by a pressure filter. Filter cake is stored in a shed before transport off-site by road truck to the port at Aviles.
Tailings Management
Rougher flotation tailings are densified in a high-rate thickener. A portion of thickened tailings is mixed with cement at the pastefill plant for underground stope filling. The remaining cemented tailings are pumped to the TSF area for final storage.
Related Entities
Related Concepts
Website: https://emcgold.com.au/
Report Date: 19 May 2025
Region: Asturias, Spain
Project Status:
Commodity:
Throughput:
Mine Life:
Mine Type:
Ore type:
Salave Gold Project — 2018 Technical Report
Salave Gold Project — 2018 Technical Report
| Company | Black Dragon Gold Corp. |
| Date | 2018 |
| Region | Not Specified |
| Commodities | Gold |
| Status | Exploration |
Executive Summary
This document represents the Mineral Resource Update for the Salave Gold Project, prepared by CSA Global for Black Dragon Gold Corp. in 2018. The report focuses on the current status of mineral resources defined over the property. It is important to note that no Mineral Reserves have been defined for the project at this time. Consequently, the economic viability of the identified Mineral Resources has not been supported by a Preliminary Economic Assessment (PEA), prefeasibility study, or feasibility study.
Due to the absence of defined reserves and supporting economic studies, the property is not classified as an Advanced Property. This classification significantly limits the amount of technical and operational data available for disclosure within this report. The lack of advanced status indicates that the project remains in an early stage of development, primarily focused on resource definition rather than mine planning or production.
Section 17 of the report, which typically covers recovery methods, explicitly states that there is no information to disclose. This absence of data reflects the project’s current exploration phase, where processing methodologies have not yet been determined or tested. Stakeholders should be aware that future technical reports may contain more detailed operational and processing information as the project advances through the feasibility stages.
Reports
Website: https://emcgold.com.au/
Report Date: 2018
Region: Not Specified
Project Status: Exploration
Commodity: Gold
Throughput:
Mine Life:
Mine Type:
Ore type:
