Vacuum or press filters are an essential step in the mining process to separate water from the minerals. This is mostly done mechanically, although thermal drying can be used. The transportation of the minerals at this stage is done through valves due to the smaller particle size, although our C/F valve can be used depending on the particular media characteristics. Roaster / Autoclave Roasting is a metallurgical process involving gas-solids reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore has already been partially purified e.g., by froth flotation. The concentrate is mixed with other materials to facilitate the process. The C67 is recommended, while the OM150 and 33 PTD are other options.

Leaching

The minerals in precious metal mining may need to be concentrated by a process called leaching. Gold, in particular is done by adding cyanide to the ore slurry and leaching the gold into a solution.

Tailings

Tailings are the materials left over after separating the valuable minerals from the unusable portion of an ore. Tailings are distinct from overburden or waste rock, which are the materials overlying an ore or mineral body that are displaced during mining without being processed. Mine tailings are usually produced from the mill in slurry form (a mixture of fine mineral particles and water). Customers will have the best results by using the valve. Rubber lined straightway diaphragm valves are excellent for tailings with low pressure drop and ability to seal over entrained solids. Tailings applications may be limited due to size and pressure limitations.