• Food/Pharmaceutical    • Chemical     • Mining/Minerals     • Biomass to Ethanol     • Wastewater Mining/Minerals - Mining, Metallurgical, Hydrometallurgical Pneumapress® filters provide the highest throughput per unit filter area, simplest and most abrasion resistant construction, and lowest maintenance and downtime of any automatic pressure filter in the world; there are no true technical parallels to Pneumapress® in the minerals field. Many mining and mineral applications may take advantage of propriety Pneumapress technology. This technology either eliminates the need for thermal drying by obtaining very low product moistures or it provides the operator the ability to control the moistures to a desired level. Applications include coal, iron ore, copper processing, zinc, nickel, molybdenum, bauxite, gold, lead, soda ash, phosphate, potash, PCC, calcium sulphate, solvent extraction processes and minerals concentrates. Application Example: Precipitated Silica During crystallization and clarification, precipitated silica compounds are removed from geothermal fluids. Pneumapress® filters are used to filter, wash and dewater a 230F, corrosive silica slurry that is supersaturated with chloride salts. The filter produces washed, dry solids which consistently meet requirements without further processing. Five filters have been installed to date. Calcium Sulphate In a calcium sulphate application, a Pneuampress® filter is used where the slurry must be maintained at high temperature and dewatered rapidly to very low moisture content. Copper Sulfide In a copper smelting application, a Pneumapress® filter washes, dewaters and dries copper sulfide to allow for economical processing downstream.
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