Vortex Milling Standalone Equipment Container
2-3 metric tone capacity each hour, depending on hardness
The industrial production of homogeneous disperse mixtures (alloys) directly between the constituent components in the solid phase, avoiding the stage of their meltdown, became possible with the resonant-vortex installation "Tornado" in one step.
Methods were developed for the following: metal-carbon, carbon-metal;intermetallic compounds; multi-component mixtures;carbides, metal carbides, binary carbides, multipartite ceramics, carbides, with the insertion of atoms;3D- mixtures, mixtures for plasma spraying and powder metallurgy;mixtures for super-strong multi-pole magnets and so on.
The "Tornado" installation is designed in a way so that any particle of the input material gets literally torn by the repeated crossing of the differential pressure zones in the intervortex vacuum chamber, which produces ultra-high gradient (pressure drops) at the interface (up to hundreds of thousands of atmospheres). When the material is injected into such area of pressure differential, a rupture of the material’s structure and clusters occurs. Such mechanism can be compared to the mechanism of material’s sample destruction, which is done in order to determine its strength characteristics at tensile test plants. That is, the grinding occurs not due to the friction or any other mechanic force, but by “air” and resonances, which provide a high and efficient performance, great flow rate of raw material as well as inexpensive exploitation (no rubbing parts) with low power consumption. In the process of solid mixtures grinding within the working chamber of the "Tornado”, occurs an accelerated process of mass transfer and chemical interaction between the components with no thermal effects. The process can be influenced by reagents. In the formation of compact samples obtained from the activated micro powders by hot pressing, a further homogenization of the material in which the matrix of micro-heterogeneity of the solid solution amounts to about 0.2 weight .%, The pressing temperature is reduced and the sample density is increased. The study of the process within the working chamber showed that one-step activation occurs, and almost at the same time, according to the scheme: dispersion -mechanical mixing - chemical interaction between which there are no clear boundaries. Examples of the mechanically activated micro powders:TiC+ZrC + diamond micro powders, compounds Al2O3 - Cr2O3, titanium carbide-nickel, oxides as modifier for resins, polyethylenes that increase the physico-chemical properties (Nano-dimension and ultra 0.1 to 1 micron) - TiO2, ZrO2, Cr2O3, Fe2O3, Fe3O4, CoO, NiO, CuO, ZrO2-Y2O3, BaTiO3, Li(Na)MO2, РЗЭ2Ti(Zr) 2O, Y3Al3O12; Ni70Al30; NiCr20Ti2,5Al; S i 0 , 8 - G e 0 , 2 ; N i - C r - B - S i - С ; S m C o 5 , Ni45Co5Mn40Sn10; HF-Та-C,AlSi12, AlSi10Сu, AlZn10Si8Mg, and etc.
Particularly interesting is the application of the technology of producing micro and Nano-dispersed powders, the so-called pseudo alloys that are difficult or impossible to obtain by the traditional melting of the components. Therefore, pseudo alloys are acquired in other ways, in particular by sintering of the powder components. The physic-mechanical and operational properties of the pseudo alloys are superior to the traditional alloys of similar purpose. Often, a high level of specialized magnetic, nuclear (radiation), electric and other properties can be ensured only by pseudo alloys. The intensification of the operational impact and, above all, the temperature, leads to the need of developing high-temperature materials based on refractory metals – tungsten, tantalum, molybdenum and niobium. Thus, the technology of highly dispersed "Tornado" powders production has increased physical and mechanical properties of pseudo alloys W-Fe-Ni and Mo-Cu which are of special purpose. The parameters of the microstructure, defects of the crystalline structure and phase composition of the mechanically activated mixtures for the systems W- Ni-Fe and Mo-Cu were identified, as well as the optimal regimes of the mechanical activation of these systems. A positive result from the use of the Nano powders is the formation of a fine-grained structure of sintered materials. The industrial technology of production of electric-pseudo alloy Mo - Cu for gas-insulated switches, superior in its characteristics in contrast to all the world analogues. During the research, it was revealed that the mechanical activation is not limited to a simple increase of the free-surface, it is always accompanied by a change of the physical state, chemical properties and composition of the grinded material. Ultrafine grinding is accompanied by a change of defects of the crystalline structure, up to the complete amorphization of the substance. This creates an "aftereffect" due to the fact that the grinded material possesses "excess" energy that was accumulated during the grinding process. These processes facilitate the functionalization of homogeneous and also carbon structures, such as metal inoculation. Read more