O.K., I will pretend this is a real request.
The geographical location is important - you will likely want to contact copper processors who are near you to minimize shipping costs.
Ignoring geography as well, and just going with big, flexible copper smelting operations, did you try Kennecott Utah Copper? They are owned by Rio Tinto and located near Salt Lake City. Their main business is smelting actual copper concentrate (a finely ground powder) from an enormous open pit mine, but they do have facilities to bring other materials into the refinery because of recycles and such.
Call their main number on the website, and ask for the name and number of concentrate or material buyers. Explain you have 1.5 million tons of copper. That should pique interest (and suspicion). They will want assays, physical condition, speciation (oxides, metallic, sulfides etc.) and of course physical sizes. Anyone treating this material would want that info.
Two other big smelters are the Hayden Refinery (Grupo Mexico) in Arizona, and Freeport McMoRan's operation also somewhere in Arizona. Otherwise, you are dealing with copper recyclers, who generally have the ability to melt and maybe somewhat purify a melt, before casting and selling bulk impure copper. Most don't have any facility to deal with oxides, sulfides, chlorides or any significant impurities.
Also, if you have chlorides or fluorides, you will need to disclose that, along with arsenic, berrylium and all the organic contaminants like PCBs.
Good luck with it.