Standard toll processing materials are refined and processed for specialty abrasive requirements and applications. Many processes such as micro-finishing, polishing, lapping and turbo-abrasive machining require or benefit from discrete particle size distributions of abrasive grains and powders. Toll processing materials such as diamond, cubic boron nitride, boron carbide, alumina, garnet, and zirconia are routinely processed to customer specifications.
Naturally occurring, synthetic, precipitated, fused, and surface/property modified minerals may require size reduction, size classification, or screening to improve material or application properties. Many minerals are used as carriers, substrates or catalysts during secondary processing.
Chemical processing is performed to maintain top size control, intermediate distribution requirements, fine particle control or removal, or combinations of any of these criteria. Hammer milling, jet milling, air classification and screening are typical processes utilized to obtain desired products.
Engineered and specialty ceramic materials are processed with equipment lined with abrasion resistant materials and components in high wear areas, thus minimizing contamination. Narrow particle size distribution products can be obtained through utilization of air classification equipment.
Carbon and graphite material applications are becoming more diverse with particle size typically a primary consideration for optimum application or product performance. Whether as a filtering aid or as a carrier/catalyst, fine or coarse particle removal from a broad band particle size distribution can provide desired surface area or other material properties.
Soft and heat sensitive toll processing materials are processed under ambient processing conditions to obtain desired products. Sub-micron to coarse particle size distributions may be obtained by utilization of selective multiple process equipment combinations and configurations.
Powder Technology Inc. is the leading manufacturer and supplier of test dust for the filtration, automotive, heavy equipment industries, and military testing and operations. Arizona test dust is sold under a variety of names including Arizona Road Dust, Arizona Silica, AC Fine and AC Coarse Test Dusts, SAE Fine and Coarse Test Dusts, J726 Test Dusts, and most recently ISO Ultrafine, ISO Fine, ISO Medium and ISO Coarse Test Dusts. If you are interested in reading the history of Test Dust and PTI’s early involvement in establishing ISO standards with AC Spark Plug, a Division of General Motors, click on the following link.