Standard Metals Processing Inc   (SMPR)
Other Ticker:  
    Sector  Basic Materials    Industry Metal Mining
   Industry Metal Mining
   Sector  Basic Materials

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  Standard Metals Processing Inc 's

Business Segments Description

Toll milling is a process whereby mined material is crushed and ground into fine particles to ease the extraction of any precious minerals contained therein, such as minerals in the gold, silver and platinum metal groups. Custom milling and refining that are designed specifically for each ore load can include many different processes to maximize the extraction of precious metals from ore, carbon or concentrates.


Ore is sent to our facility at the responsibility and cost of the customer. The Company will take a sample of the ore through a specific ore sampling procedure. The Company’s metallurgist will test the sample on site. To obtain a quantitative determination of the amount of a given substance in a particular sample, the Company can perform wet methods and dry methods. In the wet method, the sample is dissolved in a reagent, like acid, until the purified metal is separated out. In the dry method, the sample is mixed with a flux (a substance such as borax or silica that helps lower the melting temperature) and then heated so that the impurities in the metal fuse with the flux, leaving the purified metal as residue.

If it is determined that the sample is approved for processing, the customer and the Company will then agree upon a value of the metal grade per ton. If there is any disagreement on the value, a third party referee determines the value by testing the sample. The Company charges either a flat fee per ton of the ore processed or a percentage of the precious metals extracted during processing, or a combination of both based on the amount of work that is performed.

There are various methods of extraction. The Company determines which method to use based upon the sample sent to the Company. In most situations, a series of tests will be performed on a bulk sample ranging in size from 250 to 1,000 pounds. A metallurgist will determine the best process or processes to use for the extraction based on several factors. These include the composition of the host rock, mineralization of the host rock, whether or not it is an oxide or sulphide ore body, and the particle size of the precious metal. After the metallurgist reviews these characteristics, the Company will run ore on a gold table and assays the concentrates, middlings, and tails. An assay is an investigative procedure for qualitatively assessing or quantitatively measuring the presence or amount of precious metals in ore. If there is too much gold in the middling or tails, the size of the grind is adjusted to increase yield or if there is not enough gold in the middlings or tails the Company grinds the material to a coarser mesh.

Some of our miner customers will be able to take their tailings (the material left over after the desired minerals have been extracted) from the material they deposited with the Company and put it back in the exact same mines those particular tailings came from. This eliminates the need for the Company to dispose of those tailings.

Concentrate/Leach Circuit

Concentration is the separation of precious minerals from other materials by utilizing different properties of the minerals to be separated including density, magnetic or electric and physiochemical. The Company will attempt to create a “concentrate” of minerals to reduce the size of each ton processed. The Company may also receive concentrates from customers, especially those where transport of tons of raw ore is not feasible.

The leaching process uses chemicals to extract the metals from the solid materials (concentrates) and bring them into a solution. Once the metals are in the solution, it is passed through carbon or resin columns where the precious metals are deposited onto the carbon/resin.

The metals will then be stripped from the carbon back into a different solution where they are pumped through an electrowinning circuit in a process called carbon stripping. The metals are then deposited onto stainless steel in the electrowinning circuit. After this stage, the metals are either sold or further refined off-site. The solution is recycled and used again to process additional material.


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