According to an implementation of the present subject matter, a method for producing stable nanofluids is described. The method includes mixing of a base fluid with a dispersant and a metal oxide powder to form a primary mixture. The base fluid is a heat transfer fluid and the metal oxide powder includes particles of size greater than 100 nm. The method further includes grinding the primary mixture to obtain a concentrated nanoparticle suspension where the dispersant is added to the primary mixture during the grinding after every pre-determined time period.

A system for processing a heterogeneous material includes a conduit for a pressurized fluid and a nozzle assembly in fluid communication with the conduit. The nozzle assembly includes a plurality of adjustable nozzles configured such that fluid streams passing through each nozzle intersect at an oblique angle after passing through the nozzles. At least one of the fluid streams comprises a heterogeneous material. A method of processing a heterogeneous material includes entraining heterogeneous particles into at least one fluid stream, passing the fluid stream through an adjustable nozzle, impacting the fluid stream with another fluid stream at an oblique angle to ablate the heterogeneous particles, and classifying the heterogeneous particles.

A system for processing a heterogeneous material includes a conduit for a pressurized fluid and a nozzle assembly in fluid communication with the conduit. The nozzle assembly includes a plurality of adjustable nozzles configured such that fluid streams passing through each nozzle intersect at an oblique angle after passing through the nozzles. At least one of the fluid streams comprises a heterogeneous material. A method of processing a heterogeneous material includes entraining heterogeneous particles into at least one fluid stream, passing the fluid stream through an adjustable nozzle, impacting the fluid stream with another fluid stream at an oblique angle to ablate the heterogeneous particles, and classifying the heterogeneous particles.

A method of utilizing construction and demolition waste is disclosed. The method comprises pretreating the construction and demolition waste into particles with a predetermined range of size; and obtaining calcium carbonate from the particles. The method of the present invention enables to recycle a wide range of construction and demolition waste, furthermore it can convert these waste materials into the high purity calcium carbonate which can be widely used in many applications.

A planetary roller mill for processing a feed material includes a vessel with a grinding ring having an opening and a first area. The grinding ring is in sealing engagement with an inside surface of the vessel. At least two non-circular support plates are secured to a rotatable shaft. Each plate has an axially facing surface. A plurality of rollers are rotatably mounted to and positioned between the two support plates. Each of the plurality of rollers are in grinding communication with the grinding surface. The planetary roller mill includes an air supply system having an outlet in communication with the opening in the grinding ring. Areas of the two support plates are of magnitudes configuring a flow area through the opening of at least 30 percent of the first area to provide a predetermined quantity of heated air to remove moisture from the feed material in the mill.

A planetary roller mill for processing a feed material includes a vessel with a grinding ring having an opening and a first area. The grinding ring is in sealing engagement with an inside surface of the vessel. At least two non-circular support plates are secured to a rotatable shaft. Each plate has an axially facing surface. A plurality of rollers are rotatably mounted to and positioned between the two support plates. Each of the plurality of rollers are in grinding communication with the grinding surface. The planetary roller mill includes an air supply system having an outlet in communication with the opening in the grinding ring. Areas of the two support plates are of magnitudes configuring a flow area through the opening of at least 30 percent of the first area to provide a predetermined quantity of heated air to remove moisture from the feed material in the mill.

A process for producing fine particles with a high aspect ratio and/or a low specific surface area includes use of a jet mill. An alkaline grinding aid is added to a grinding gas before the grinding gas is fed into a grinding chamber of the jet mill. The process includes micronization of particles of layered structure material having an interplanar distance ranging from 0.30 nm to 0.40 nm as measured by X-ray diffraction method.

A process for producing fine particles with a high aspect ratio and/or a low specific surface area includes use of a jet mill. An alkaline grinding aid is added to a grinding gas before the grinding gas is fed into a grinding chamber of the jet mill. The process includes micronization of particles of layered structure material having an interplanar distance ranging from 0.30 nm to 0.40 nm as measured by X-ray diffraction method.

The present invention relates to a process for comminuting glass fibers from waste glass-based fibrous materials.

The present invention relates to a process for comminuting glass fibers from waste glass-based fibrous materials.