Arizona Gold & Silver Inc. Begins Phase 2 at Philadelphia Project
- OATMAN, Ariz.(May 13, 2025) – Arizona Gold & Silver Inc.
- The initial phase of testing demonstrated the Philadelphia project's auriferous material is amenable to low-cost heap leaching, achieving gold recoveries between 61% and 73%.
- The current phase involves a 415-kilogram sample and incorporates High Pressure Grinding Roll (HPGR) technology to perhaps enhance gold recovery.
Arizona Gold & Silver Advances Philadelphia Project with Phase 2 Metallurgical Testing
Table of Contents
- Arizona Gold & Silver Advances Philadelphia Project with Phase 2 Metallurgical Testing
- Arizona Gold & Silver’s Philadelphia Project: A Deep Dive into phase 2 Metallurgical Testing
- What is the Philadelphia gold-Silver Project?
- what is the focus of Phase 2 metallurgical testing?
- What is heap leaching, and why is it being considered for the Philadelphia Project?
- What were the key findings from Phase 1 of the testing?
- What is HPGR crushing and why is it being used in Phase 2?
- What are the key objectives of Phase 2?
- How is Phase 2 of the testing being conducted?
- What are the testing parameters in Phase 2?
- What are the economic implications of Phase 2 testing?
- How does Phase 2 relate to the overall project timeline?
- Can you summarize the key differences between Phase 1 and Phase 2?
- Where can I find more information about the project?
OATMAN, Ariz.(May 13, 2025) – Arizona Gold & Silver Inc. has commenced the second phase of metallurgical testing at its Philadelphia Gold-Silver project, located in the Oatman district of northwestern Arizona. The focus of this phase is to refine and validate low-cost heap leaching as an effective method for gold extraction.
Key Objectives of Phase 2
The initial phase of testing demonstrated the Philadelphia project’s auriferous material is amenable to low-cost heap leaching, achieving gold recoveries between 61% and 73%. Phase 2 builds upon these findings.
The current phase involves a 415-kilogram sample and incorporates High Pressure Grinding Roll (HPGR) technology to perhaps enhance gold recovery. Ongoing drilling at the Philadelphia site suggests that the mineralization’s width and grade are commercially viable for a heap leaching operation. These metallurgical tests are crucial in assessing the feasibility of a large-scale project.
Testing Parameters
Phase 2 leaching tests consist of four parallel columns. Two columns contain material crushed conventionally, while the other two utilize HPGR crushing. Each pair will be tested at two different crush sizes, nominally -6.3 mm and -12.5 mm, over a 90-day period.
The primary goal is to determine if HPGR crushing improves gold recovery and rate, and to quantify any gains. Power requirements for HPGR crushing will also be assessed.
Economic Implications
Data from these tests will inform the design and cost estimation of a suitable crushing system for future economic analyses of the project’s development. This phase represents the next step in the multi-stage metallurgical evaluation of the Philadelphia Gold-Silver project, following the accomplished Phase 1 column leach testing. Phase 1 results indicated the project’s suitability for heap leach recovery methods.
Phase 1 Highlights
Gold recovery in Phase 1 ranged from 61% to 73% over a 177-day leaching cycle, using a P80 -6.3 mm crush size. Gold extraction continued beyond this period. The extraction rate correlated with particle size, with finer crushing and grinding yielding higher recoveries. A final report recommended considering HPGR crushing to produce finer particles and microfractures, improving access to the gold.
Results from Phase 1 were detailed in a news release dated Oct. 23, 2024.
Arizona Gold & Silver’s Philadelphia Project: A Deep Dive into phase 2 Metallurgical Testing
What is the Philadelphia gold-Silver Project?
The Philadelphia gold-Silver project is located in the Oatman district of northwestern Arizona. Arizona Gold & Silver Inc. is currently conducting metallurgical testing to assess the feasibility of gold extraction at the site.
what is the focus of Phase 2 metallurgical testing?
The primary focus of Phase 2 metallurgical testing is to refine and validate the use of low-cost heap leaching as an effective method for gold extraction at the Philadelphia project.
What is heap leaching, and why is it being considered for the Philadelphia Project?
Heap leaching is a method used to extract gold from ore. The ore is piled on a “heap” and a leaching solution is poured over it. The solution dissolves the gold, and the gold-bearing solution is then collected and processed to recover the gold.It’s a cost-effective method, making it a suitable choice for the Philadelphia project, as indicated by the initial Phase 1 results.
What were the key findings from Phase 1 of the testing?
Phase 1 results showed that the Philadelphia project’s ore is amenable to low-cost heap leaching.
Gold recovery: Between 61% and 73% of gold was recovered during Phase 1.
Leaching cycle: The extraction took place over a 177-day cycle.
Particle size: Finer crushing and grinding yielded higher gold recoveries.
Suggestion: HPGR crushing was recommended to produce finer particles.
These findings suggested that heap leaching could be a viable method for gold extraction at the project.
What is HPGR crushing and why is it being used in Phase 2?
HPGR (High-Pressure Grinding Roll) crushing uses two counter-rotating rollers that apply high pressure to crush the ore. It’s being used in Phase 2 to potentially enhance gold recovery. It’s expected to produce finer particles and microfractures in the ore,potentially improving access to the gold for the leaching solution.
What are the key objectives of Phase 2?
phase 2 testing has several key objectives:
To validate and possibly improve gold recovery rates achievable through heap leaching.
To quantify the gains from using HPGR crushing.
To assess power requirements for HPGR crushing, which impacts the project’s overall economic feasibility.
To obtain data for the design and cost estimation of a suitable crushing system.
How is Phase 2 of the testing being conducted?
Phase 2 testing involves four parallel columns. Two columns use conventional crushing, while the other two use HPGR crushing. Each pair will be tested at two diffrent crush sizes (-6.3 mm and -12.5 mm) over a 90-day period. A 415-kilogram sample is being employed for these tests.
What are the testing parameters in Phase 2?
Phase 2 leaching tests consist of:
Four parallel columns.
Two columns utilizing conventional crushing.
Two columns utilizing HPGR crushing.
Each pair tested at two crush sizes: -6.3 mm and -12.5 mm.
* A 90-day testing period.
What are the economic implications of Phase 2 testing?
The data derived from Phase 2 testing will be crucial for future economic analyses of the Philadelphia project’s development. This data will inform the design and cost estimation of the optimal crushing system.
How does Phase 2 relate to the overall project timeline?
Phase 2 is a critical step in the multi-stage metallurgical evaluation of the Philadelphia Gold-Silver project. It builds upon the findings of Phase 1 and provides essential data to assess the feasibility of large-scale gold extraction. The project is in the assessment phase to evaluate the economic potential.
Can you summarize the key differences between Phase 1 and Phase 2?
| Feature | Phase 1 | Phase 2 |
| ——————— | —————————————– | ————————————————————————- |
| Primary Goal | Assess amenability to heap leaching | Refine heap leaching process, test HPGR crushing |
| Testing Method | Column leach testing | Four parallel column tests (conventional vs. HPGR, two crush sizes) |
| Key Findings | 61-73% gold recovery, particle size matters | Quantify gains from HPGR, assess power requirements |
| Time and Crushing | 177-day cycle, -6.3 mm crush | 90-day cycle, two crush sizes (-6.3mm and -12.5mm) |
| Sample size | Not specified | 415 kg gold sample |
Where can I find more information about the project?
The source material indicates that results from Phase 1 were detailed in a news release dated October 23, 2024. Additional information might potentially be available through Arizona Gold & Silver Inc.’s official channels.