SiPi Metals
Chicago, IL, USA

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a.k.a./f.k.a.:No known alias
CHWMEG Report Number:H346.3
Member Interest: This facility is currently being tracked by 13 members
(Member interest is not related to how many members use this facility.)
*Location Map:Google Maps
Review Program
(Visit Date):
2020 (8/13/2020)
There are 3 more reviews conducted prior to 2015 not shown.
Description of Services:The facility is a secondary smelter with the primary operations consisting of smelting and refining of non-ferrous metals. SiPi refines a broad range of material including printed circuit boards; connectors; I.C. chips; catalysts (auto, chemical, and petrochemical); silver batteries (zinc/magnesium); carbon recovery media; laboratory equipment (platinum crucibles, etc.); plating residues, solutions, and sludges; jet engine compressor stators, fuel manifolds, etc.; photographic film; film ash, silver recovery cartridges; and manifested hazardous wastes containing precious metals. Wastewater is also accepted and processed onsite. The facility operates under 40 CFR 266.70, Recyclable Materials Utilized for Precious Recovery, and is exempt from most RCRA requirements (no RCRA permit required).

Some of the materials processed include: printed circuit boards; computer chips; silver batteries (Zinc/Magnesium); metallic replacement cartridges (from X-ray labs); laboratory equipment (platinum crucibles, etc.); military awards/buttons (gold-plated); plating residues; jet engine compressor stators, fuel manifolds, cell phones, accessories and network equipment.

All wastes accepted at the facility are transported in bulk via trailers by appointment only. Upon receipt at the facility, the wastes are weighed, inventoried, and bar carded into a computer tracking system, Navision. All wastes are sampled upon arrival to determine the chemical contents (metals), primarily to determine the economic value.

Operations include mechanical, pyro-metallurgical, and hydro-metallurgical (the “HydroMet” chemical process to remove cyanides from wastewater) techniques to refine the incoming wastes into valued products. Processes include shredding, milling, pyrolitic reduction, and screening of wastes prior to melting the materials in the furnaces to remove any impurities. The molten metal is then poured into ingots, which are stored in the warehouse for marketing. Slag from the furnaces is allowed to cool, placed into a stockpile, and then drummed and eventually sold as a commodity.

Wastewater is primarily neutralized, filtered, cyanides removed, and the solutions are evaporated to retain the valued metals. This process generates hazardous wastewater that is stored in three aboveground storage tanks. The wastewater is shipped offsite for treatment/disposal. Due to the intrinsic economic value of some of the residuals, solid residuals are reprocessed in a recycling furnace (operated at a higher temperature than the other furnaces) to retain any metals present, and wastewater in the HydroMet may be reprocessed as well. Depending on the zinc percentage in the metal refining process, dust generated from baghouses may be sold as a commodity, mainly to fertilizer companies.

Description Date:2010 Facility Review Program
Facility Location Map:

*CHWMEG, Inc. cannot guarantee the accuracy of the maps. Maps are for informational purposes only. The latitude and longitude for this map are from the most recent CHWMEG facility review.