Abstract: Process and apparatus for pyrometallurgically treating finely divided ores, concentrates, residues, slags and like materials. The process utilizes a reactor having two co-axially extending, vertical reaction chambers. The process comprises forming within the upper chamber of the reactor hot fuel-rich reaction gases; passing the hot fuel-rich reaction gases by dump flow into a second vertically extending chamber; introducing into the second chamber the finely divided materials to be treated; and reacting the finely divided materials with the hot fuel-rich reaction gases. The dump flow of hot fuel-rich reaction gases passing into the second chamber is produced by providing a zone of sudden expansion in the flow passage between the first and second chambers.

Abstract: Process and apparatus for pyrometallurgically treating finely divided ores, concentrates, residues, slags and like materials. The process utilizes a reactor having two co-axially extending, vertical reaction chambers. The process comprises forming within the upper chamber of the reactor hot fuel-rich reaction gases; passing the hot fuel-rich reaction gases by dump flow into a second vertically extending chamber; introducing into the second chamber the finely divided materials to be treated; and reacting the finely divided materials with the hot fuel-rich reaction gases. The dump flow of hot fuel-rich reaction gases passing into the second chamber is produced by providing a zone of sudden expansion in the flow passage between the first and second chambers.

Abstract: A high surface area lead oxide composite is prepared by providing a mixture of starting matter containing lead oxide and a hydrogen bonding solvent and by then subjecting the mixture to a gaseous stream inclusive of ozone. The resulting reaction product is a solid composite of lead oxide and lead dioxide, found to exhibit greatly increased surface area and electrical conductivity over the starting material for efficient use of the solid composite as active material in electrochemical cells.

Abstract: Zinc and, if desired, lead are volatilized from a metallurgical material such as a finely divided oxidic ore, ore concentrate or another metallurgical intermediate. The volatilization of the zinc is carried out at a temperature above 1300.degree. C. in a cyclone chamber which has an axis that is substantially horizontal, i.e. is inclined to the horizontal at an angle of 0.degree. to 15.degree.. Carbon dioxide is removed from the gas leaving the zinc condensing stage and the high carbon monoxide gas thus obtained is recycled to the cyclone chamber or at another point ahead of the condensation stage.

Abstract: Substrate such as relatively porous, low thermally conductive materials are coated with molten lead, lead-base alloys, zinc, zinc-base alloys, tin, tin-base alloys, cadmium, cadmium-base alloys, aluminum, aluminum-base alloys and the like by spreading the molten metal by means of a low thermally conductive roll to provide products useful in sound attenuation, moisture and corrosion proofing and radiation shielding.

Abstract: High-precision, fine-detail forgings are formed from a workpiece material having superplastic forming characteristics by utilizing high strain rate forming to impart the bulk of the total deformation required and superplastic relatively low strain rate forming to impart detail and approach final tolerances in the product.

Abstract: Stable wrought lead-calcium-tin alloys can be prepared by casting an alloy of lead having a calcium content of from about 0.02% or 0.03% to about 0.1% by weight and having a tin content such that the tin to calcium weight ratio or relative tin content is from about 7:1 to 10:1 and preferably is more than 10:1 up to about 100:1, with the proviso that the absolute tin content be from about 0.3% to about 2.0%; and thereafter cold working the casting at a time period of within about 24 hours after casting for the lead-calcium-tin alloys having a tin to calcium weight ratio of from about 7:1 to 10:1 and within about 48 hours after casting for the lead-calcium-tin alloys having a tin to calcium weight ratio of from more than 10:1 up to about 100:1.Aged work pieces heated sufficiently to dissolve the precipitated calcium phases can be similarly treated.

Abstract: Bicharge photoconductive zinc oxides useful in the production of photoprint papers providing good quality photoprints in both positive charge and reversal modes are prepared by heating photoconductive zinc oxide in air to a temperature of from about 100.degree.C. to about 500.degree.C. in the presence of iodine or an inorganic or organic iodide.

Abstract: Mercury is removed from sulfuric acid by adding finely divided aluminum to the acid, cooling the mixture to a temperature not exceeding about 15.degree.C. and filtering the mixture in from about 1 to about 6 hours.

Abstract: A tiltable coupling has one end thereof connected to a down-hole drill and has the other end thereof connected to a section of drill rod. By using that tiltable coupling, it is possible to cause a down-hole drill to drill curved holes in subterranean formations. That tiltable coupling serves to connect the section of drill rod to the down-hole drill, and also serves as a conduit for the compressed air which must be supplied to that down-hole drill.One preferred embodiment of the tiltable coupling has a fulcrum at one side thereof and has a piston at the opposite side thereof; and that piston will be left inactive whenever a straight section of the hole is to be drilled, but that piston will be actuated whenever a curved section of that hole is to be drilled.

Abstract: Zinc alloys having improved physical properties consist essentially of 10 to 30 percent by weight of aluminum, 0.3 to 10 percent by weight of copper, 0.01 to 0.1 percent by weight of magnesium, 0.005 to 0.3 percent by weight of at least one of the metals calcium, .[.lithium.]. and sodium, and the balance zinc.