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Metallurgical Testing



As a general rule, samples should be taken from across the mine site (both the mine perimeter and varying subsurface depths) to replicate actual geological conditions and prevent data biases. We'll help develop a plan to gather, transport, and prepare prepare your samples to ensure testing is reflective of genuine geological conditions.


We ensure sample integrity is maintained from receipt at our laboratory and throughout our test preparation protocols. We divide samples into smaller subsets and ensure they are uniform and large enough to account for metallurgical variations. We plann every step so that your samples accurately represent your mine site.

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Gold Ore Crush Size Samples for Column t

Crush Size

Crush size heavily impacts solution distribution and permeability. Our diffusion fraction extraction process determines the microporosity and tortuosity of ore to understand time rate of recovery based on geological composition and particle size distribution.

Sample Preparation

Sample Receipt

Crushing - Sample > 4"

Crushing - Sample < 4"

Crushing - Sample < 1"


Sample receipt, logging and preparation

Preparation of sample greater than 4"

Coarse crushing of sample to 1"

Fine crushing of sample to 10 mesh

Pulverize to 75 µm

Sample Analysis

Splitting - Head Assay

Splitting - Head Assay


Particle Size Distribution - Coarse

Particle Size Distribution - Fine

Particle Size Distribution - Fine

Bulk Density

Preparation of head assay charge

Preparation of sample test charge

Determination of as-received moisture content

Tyler Sieve Analysis - 10 mesh to 20"

Tyler Sieve Analysis - 100 mesh to 2"

Tyler Sieve Analysis - 325 mesh to 10 mesh

Dry bulk density or water immersion

Forte Analytical Fraction Extraction Gra

Refraction Extraction Report

Sample Analysis
Sample Prep
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