Some methods for making a granular material comprise crushing demetallized slag particles with one or more crushers and screening the crushed demetallized slag particles with one or more screens to separate the demetallized slag particles into two or more fractions, the granular material comprising at least one of the fractions of the demetallized slag particles. Prior to the crushing, ones of the demetallized slag particles having a size that is less than or equal to 2 inches can account for at least 90% of the demetallized slag particles. An iron-compound content of the demetallized slag particles, by weight, can be less than or equal to 10%. Crushing and screening can be performed such that ones of the demetallized slag particles of the granular material having a size that is less than or equal to 1.25 mm account for at least 90% of the demetallized slag particles of the granular material.

A method for forming contact surfaces by peeling the insulation on the insulated conductor busbars for energy distribution systems.

A wet blast machine for cleaning or preparing surfaces comprises: a treatment source for providing a pressurised mixture of treatment material; a nozzle, the nozzle comprising: an inlet for receiving the pressurised mixture of treatment material; an outlet for ejecting the pressurised mixture; and at least one hole in a wall of the nozzle, the hole for feeding one or more products into the nozzle such that one or more surfaces of the product are exposed to the treatment material whilst within the nozzle, allowing for a more efficient wet blast of the products.

This invention relates to cleaning of deposits or scale or fouling from external surface of air coolers tubes bundle.

Air coolers in different configurations are used in oil refineries, chemical plants, and power plants to cool process liquids or to condensate gas into liquid. High thermal efficiency of air coolers is critical to maximize production and minimize waste of energy.

Current cleaning methods consist on high pressure water blast, soap (detergents), dry ice blast or using weak acids. Those methods have significant disadvantages: damage to fins, confined space entry, scaffolding, shut-down of the process unit, and more. The invention is based on On-Line pneumatic spraying of dry thin powder, combining chemical and mechanical cleaning simultaneously. Performing bottom-to-top cleaning obviates the need for water, confined space entry, scaffolding, removal of safety nets. Cleaning is performed On-Line during normal operating conditions; there is no need to shut down the process unit and no damage to fins or tubes.

Chemistry is based on a blend of compounds in different ratios to achieve desired cleaning results and to maximize the cleaning effectiveness.

An fouling cleaning process (blasted-particles cleaning process) of performing, at least once, ultrasonic cleaning treatment (Steps S22 and S25) of immersing a turbine rotor blade in a water basin and conducting an ultrasonic wave into the water basin to clean the turbine rotor blade, and pressurized-water cleaning treatment (Steps S23 and S26) of spraying pressurized water into an internal cooling flow channel after the ultrasonic cleaning treatment is performed, after a bonding coat layer removing process of removing a bonding coat layer (first coating layer) by chemical treatment and a cleaning process of cleaning the turbine blade by blast treatment, and then heat tinging process is performed.

A method to form a phosphate coating on a steel wire, the method including: continuously forming a phosphate coating on a steel wire before being subjected to cold forming; and a descaling of jetting slurry including grit-like abrasive particles onto the steel wire before forming the phosphate coating, thereby producing a new surface on the steel wire. The method can further include a preheating of the steel wire after the descaling and before the coating treatment. The method makes it possible to form a phosphate coating on a steel wire in a short time with high productivity without causing significant forming deterioration on the surface of the steel wire.

A method for descaling a sheet of metal include first and second descaling components that each have a single motor driven slurry propelling impeller mounted on a top and bottom of an enclosure. The top and bottom mounted impellers of the first component are configured to propel slurry onto a sheet of metal passing through the enclosure across the entire width of the sheet of metal in a first direction extending from one lateral side to an opposite lateral side of the enclosure. The top and bottom mounted impellers of the second component are configured to propel slurry onto a sheet of metal passing through the enclosure across the entire width of the sheet of metal in a second direction opposite the first direction and extending from the opposite lateral side to the one lateral side of the enclosure.

An orthopedic device, such as an intramedullary nail for internal fixation of a bone and a method of manufacturing the same. The orthopedic device may be formed from a medical grade powder via an additive manufacturing process. The forming process may include heat treating the additive manufactured component and machining the heat treated additive manufactured component to form the orthopedic device. Further, the orthopedic device may be formed to include an internal sensor probe channel that extends within at least a portion of the wall of the device, but which does not protrude through an outer portion of the wall. Embodiments further include a dynamizing intramedullary nail that accommodate adjustments in the relative axial positions of one or more sections of the orthopedic device. The devise may include features in an inner region of the orthopedic device that may alter an elastic modulus of the orthopedic device.

A method for cleaning a compressor having at least one compressor stage and serving to compress an operating medium. In at least one compressor stage of the compressor, during the compression operation, dry ice, or solid CO.sub.2, is used for the operating medium for abrasive cleaning of assemblies of the respective compressor stage to be cleaned.

A system including at least one means for mechanical processing of surfaces using a blasting agent (5), in particular steel or cast iron beads. An additive (6) for degreasing and cleaning of the surface to be blasted (2) and/or of the blasting agent is provided with the blasting agent (5), and comprising a granular material (6), which exhibits a lower breaking strength under the mechanical stresses that the blasting agent (5) is subject to during the blasting procedure than the at least one means for mechanical processing of the surfaces themselves. As the granular material (6) breaks down, additional additive (6) is added into the blasting agent (5) such that the proportion of the additive (6) in the blasting agent mixture blend (5) remains largely generally constant even at a prolonged operation of the device.