Abstract:
Metal strip may be cast directly from molten metal (18) in an open tundish (16) onto a chill roll (10). Strip thickness is controlled by contouring the tundish lip (32) with an offset near the casting wheel. This can be used remedially to offset the natural tendency for the strip to be thicker near the edges, which is undesirable for cold rolling, or it may be used creatively to produce contoured strip.
Abstract:
Method and apparatus are described for producing a fine, narrow size distribution metal powder. The method involves the two stage breakup of a liquid metal stream (4). A first stage breaks the liquid into moderate size droplets or ligaments (6) and delivers them, still in the liquid state, to a second stage. The second stage is a rapidly spinning cup (7) having a rotating water wall (8) which shears the droplets or ligaments from the first stage into very fine powder.
Abstract:
A new class of chromatographic columns for reverse phase and ion exchange chromatography based on organotitanate coupling along with separation processes using such media. The disclosed organotitanate coupled matrices useful for reverse phase or ionic chromatographic separations can be made using titonate coupling agents in complete replacement of conventional silanating agents.
Abstract:
Metal strip may be directly cast by deposit of a melt layer onto a chill surface. Quality of both the upper and lower surfaces of strip cast in this manner may be substantially improved according to the invention by casting on a chill roll (2) having fine, circumferential, surface grooving (32, 33, 41, 42) of a particular geometry.
Abstract:
Novel method of operating a gasifier for production of fuel gas from carbonaceous fuels. The process disclosed enables operating in an entrained mode using inlet gas velocities of less than 7 feet per second and extraordinary feedstock throughputs exceeding 4000 lbs/ft -hr.
Abstract:
Process for producing high purity aluminum nitride by reacting aluminum sulfide with gaseous ammonia or gaseous nitrogen and hydrogen at a temperature above 1100 C. When using gaseous ammonia the preferred reaction conditions are at about 1200 C to 1500 C and at about atmospheric pressure for about 2-30 hours. When gaseous nitrogen and hydrogen are used the preferred reactin conditions are at about 1200 C to 1750 C and at pressures above atmospheric for about 2-30 hours. A high purity, low oxygen containing, free flowing powder is produced.
Abstract:
A novel in-mold electrodeposition process for the production of plastic parts having conductive polymeric coatings such as polypyrroles or polythiophenes. Parts produced according to the novel disclosed in-mold electrodeposition process would have wide applicability including static free plastic parts shielding devices and circuits. The disclosed process advances the art by enabling the utilization of conductive polymers many of which were heretofore considered too brittle for commercial adaptation.
Abstract:
Molten material, especially metals, can be formed directly into fiber by allowing a stream of molten material to flow across a ramp member (12), thereby forming a thin layer (20) of molten material, under sustantially no hydrostatic pressure. At an outlet end of the ramp member, a wheel (24) bearing a plurality of ridges passes through the thin layer (20) of molten material thereby drawing out a plurality of filaments. The apparatus avoids the problem of strip formation encountered in prior art apparatus using a plurality of closely spaced ridges.
Abstract:
A process of consolidating and compacting unconsolidated particulate materials (35) with or without short fibers to a density of about one hundred percent by carrying out the process in a can or tube (38) which is moving through a convergent die (49) having an angle of convergence of less than 90o.