With LGS Refining you will receive a full array of excellence. Our state-of-the-art technology, analytic expertise, and proprietary formulas ensures our customers the highest possible yields in the refining industry.
Our areas of expertise lay in refining for Gold, Silver, Platinum, and Palladium. Results are then certified according to ASTM standards and reported back to our clients.
The list of what we process as low grade is extensive, for example we refine polishing dust, filings, sweeps, filters, vacuum bags, carpet, wipes, towels, slag, sludge, ingot paper and more.
We offer a vast array of refining services, but not limited to:
Our Low Grade Process
Low Grade is never a one step process or a one day process. To refine these by-products, it requires multiple steps and specialized equipment. A typical lot takes numerous business days to refine and here is why.
Step 1. Receive and check-in material
Each container or lot received goes through an extensive checking and sorting process. Materials received are separated, recorded, weighed, and pictures are taken.
Step. 2 Thermal Oxidation
After the check-in process, the material goes in-line to our thermal oxidizers. This will usually take 2-8 hrs depending on materials, and on a rare occasion overnight. We believe a slow burn is best. This process will incinerate all organic materials.
Step. 3 Milling
Post thermal oxidation, materials are allowed to cool and are placed into our custom made ball mill at the optimum time, not allowing for moisture to be absorbed. At this step the materials are milled into an ultra fine powder, a powder that is finer than baby powder.
Step. 4 Sifting
The crushed powder is then sifted through multiple super fine mesh screens. Two critical things occur at this step. First. the crushed material drops into a collection container and second, the materials left over on top are separated and are now known as oversize. The powder and oversize are both processed.
Step. 5A Blending
The sifted powder is blended to achieve a homogeneous mixture and samples are taken for analysis.
Step. 5B Oversize
Oversize is demagnetized and the remainder of non-magnetic material is mixed with a proprietary flux. The blend is then melted in our induction furnace into a bar or cone form. A small sample is taken for analysis.
Step. 6 Analysis
The final step is analyzing the samples from each process. The sweeps presented for assay should be free flowing, dry powder, free of any oversize particles and homogeneous in color. The most common method we utilize is a Fire-Assay. Strict ASTM guidelines are followed when performing this step to ensure and certify 99.99% accuracy on your results. Depending on the materials we extract, there may be other methods utilized such as induction coupled plasma (ICP) or atomic absorption spectroscopy (AAS)
The entire process from beginning to end takes days, if not weeks. Questions, comments, or to schedule a pick up, feel free to to visit the contact us section of our web site or reach out to your personal account manager.