You’ve heard it many times: “They cannot get all of the gold off your material through chemical stripping. If you do not melt everything, you are getting short changed.”
This simply is not true. Ordinary clean base metal scrap will strip very well. Any gold remaining after the process is usually less than 1 toz/ton. This may not be the case when the material has plastic encapsulating plated areas or where the material has an oily film. Encapsulated scrap should indeed be melted or shredded and stream sampled. However, this is a small percentage of scrap from most customers. As for oily materials, these can be readily handled with a degreaser along with multiple pass stripping. The combination of these processes is very effective.
The major benefit of chemical stripping is drastically reduced processing fees. For example, take a 2,000 lb lot of clean industrial scrap.
Melt fees @ $0.19 / toz = $5,540 Vs. Chemical stripping fees @ $0.95 / lb = $1,900
Typically, settlement times for chemical stripping are also much shorter. On average, chemically stripped materials settle in 20 working days. On the other hand, melting times are often out months. Quicker settlement may be offered, but this will usually come with a hefty financing fee.
As with any refining quote, one should be careful to examine all costs. It is not unusual for refiners to have a variety of fees (sampling, assaying, shipping, etc.). Keep in mind that if materials are melted, several melts may be required which in turn generate separate assaying fees. Also, be particularly cautious if the material is not being processed in the United States. Shipping and insurance costs can quickly exceed expectations.
The bottom line is that customers should compare their net dollar per pound return for similar materials. If given a fair evaluation, chemical stripping has consistently come out on top for most forms of plated scrap .
With a name like ours, Advanced Chemical Company, this may seem as if we are biased. The reality is we have the capabilities for both chemical stripping and melting. If you have any questions feel free to contact us directly - info@advchem.com