United States Antimony Corporation (USAC) NYSE (uamy) is a rapidly growing natural resource company that is increasing its raw material supply of antimony from properties in Mexico and third parties around the world. USAC has produced various antimony products since 1969 and is a fully integrated mining, transportation, milling, smelting, and selling company.  USAC operates the only significant antimony smelter in the United States and it is in a "sold out" condition. The Company has proven experience in underground and open pit mining, flotation and gravimetric milling, crushing and screening, dry grinding, cyanide leaching, precious metal refining, pyro-metallurgy, and marketing.

Operations include a smelter and a precious metal refinery in Montana, and a smelter and three mills in Mexico. Three Mexican properties supply direct shipping ore (DSO) or mill feed for the Mexican operations. The Los Juarez property and mill at Puerto Blanco are being permitted to start gold and silver production that will supplement the antimony values and identify the Company as a "precious metal producer." 

USAC owns 100% of the Bear River Zeolite, Corp. mine in southeast Idaho that management  regards as one of the best zeolite properties in the world due to its high cation exchange capacity, low sodium content, hardness,  uniformity, high potassium content, large surface area, and low clay and impurity content.

  • USAC Corporate Offices and Plant,Thompson Falls, Montana
  • Madero Smelter, Coahuila, Mexico
  • Puerto Blanco Flotation/Gravity Mill, Guanajuato, Mexico
  • Antimony Oxide Ore Gravity Mill, Wadley, San Luis Potosi, Mexico
  • Mining - Los Juarez Property, Queretaro, Mexico
  • Mining - Soyatal District, Queretaro, Mexico
  • Mining - Sierra Guadalupe, Zacetecas, Mexico
  • Mining - Guadalupana, Queretaro, Mexico
  • Bear River Zeolite Pit, Preston, Idaho
  • Bear River Zeolite Plant, Preston, Idaho
USAC Corporate Offices and Plant,Thompson Falls, Montana1 Madero Smelter, Coahuila, Mexico2 Puerto Blanco Flotation/Gravity Mill, Guanajuato, Mexico3 Antimony Oxide Ore Gravity Mill, Wadley, San Luis Potosi, Mexico4 Mining - Los Juarez Property, Queretaro, Mexico5 Mining - Soyatal District, Queretaro, Mexico6 Mining - Sierra Guadalupe, Zacetecas, Mexico7 Mining - Guadalupana, Queretaro, Mexico8 Bear River Zeolite Pit, Preston, Idaho9 Bear River Zeolite Plant, Preston, Idaho10


Estimated production for March 2019




% Change

Antimony pounds



+ 20

Zeolite tons




Inventories of unprocessed antimony continue to grow even with the increase in monthly production.





March 2019

Antimony metal









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April 1, 2019. Thompson Falls, Montana. United States Antimony Corporation (“USAC”, NYSE American “UAMY”) reported a sustained higher level of production of antimony from the Wadley and Guadalupe Mines in Mexico. USAC has resumed the production of high purity antimony metal at its Madero smelter and is expediting the installation of two more large rotary furnaces (LRFs) from Reynosa. Each furnace will be capable of roasting 4 to 5 metric tons of Wadley ore per day or 5 to 7 metric tons per day of concentrate from Guadalupe or Los Juarez. USAMSA (a wholly owned subsidiary of USAC) has three more LRFs in inventory.

Three LRFs, 1 operating and 2 under construction

Progress on the construction of the cyanide leach plant at the Puerto Blanco mill for the Los Juarez gold, silver, and antimony mine has included wiring, plumbing, fresh water supply, tailings lines, and the installation of screens, pumps, compressors, transformers, and roofing. A culvert is being installed in the floor of the tailings pond to discharge storm water from above the pond to below the pond. This will be followed by the installation of the 1 mm thick HDPE pond liner that will cover approximately 5 acres. Testing and startup of the plant is anticipated during Q2 2019.

Culvert to be installed in the floor of the 5 acre tailings pond

Cyanide leach plant stainless steel tankage.

 Bear River Zeolite sales continue to be strong for the rest of the year. Currently off shore interest is increasing for a variety of applications. We now have a Korean Company that will be selling a variety of BRZ products in Korea. The operation continues to be a source of expansion funds for USAC.

CEO John Lawrence said “The installation of the LRF furnaces coincides with the large increase in Mexican mine production. Coupled with the cash flow from strong zeolite production, the Company is positioned to complete the construction of the Los Juarez cyanide leach circuit at Puerto Blanco and begin testing and shakedown. Gold and silver production is imminent.”

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March 29, 2019. Thompson Falls, Montana. United States Antimony Corporation

(“USAC”, NYSE American “UAMY”) will host an investor call at
4:15 P. M. EDT
on Monday April 1, 2019 to review the 2018 10K.

Remote Replay available for 7 days:

Conference ID/Passcode:  7296372

Toll free: 1-888-203-1112

International:  1-719-457-0820


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Forward Looking Statements:

This Press Release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 that are based upon current expectations or beliefs, as well as a number of assumptions about future events, including matters related to the Company's operations, pending contracts and future revenues, ability to execute on its increased production and installation schedules for planned capital expenditures and the size of forecasted deposits. Although the Company believes that the expectations reflected in the forward-looking statements and the assumptions upon which they are based are reasonable, it can give no assurance that such expectations and assumptions will prove to have been correct. The reader is cautioned not to put undue reliance on these forward-looking statements, as these statements are subject to numerous factors and uncertainties. In addition, other factors that could cause actual results to differ materially are discussed in the Company's most recent filings, including Form 10-KSB with the Securities and Exchange Commission.


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