Abstract: A process and system are provided for flash-roasting molybdenum sulfide containing slag-forming constituents. The process comprises feeding a pneumatically suspended stream of particulate molybdenum sulfide and a mixture of fuel and oxidizing gases through a nozzle into a confined furnace chamber, the fuel gas-oxidizing gas mixture exiting from the nozzle being ignited to provide a flame thereof, the flame being maintained at a condition to provide a temperature in the furnace chamber sufficient to oxidize the molybdenum sulfide and form a volatile gas comprising molybdenum trioxide. The temperature is at least sufficient to melt the slag-forming constituents such that the slag formed is sufficiently liquid to separate from the gaseous mixture and collect at a selected portion of said chamber for removal therefrom.

Abstract: A hydrometallurgical process is provided to electrogalvanize steel, utilizing primary and secondary zinc sources. The process consists of leaching the feed in a mildly acidic solution. The zinc is selectively recovered from the leach liquor in a solvent extraction system and thereafter stripped from the solvent using a stronger acidic solution to provide a strip solution which is fed to an electrogalvanizing bath for electrogalvanizing steel products, e.g., sheet steel, using insoluble anodes. Acidic solutions and organic solvent are recycled in the process.

Abstract: A process is provided for converting MoS.sub.2 to MoO.sub.2 wherein, MoS.sub.2 in particulate form is fed into a reactor while flowing MoO.sub.3 vapor therein to effect reaction thereof with MoS.sub.2 to form MoO.sub.2. The temperature in the reactor is maintained at a level sufficient to cause the reaction to go forward. A portion of the MoO.sub.2 is removed from the reactor as a product and the remainder is selectively oxidized at a temperature sufficient to generate gaseous MoO.sub.3 which is recycled to the reactor relative to the flow of MoS.sub.2 therein to convert the MoS.sub.2 to MoO.sub.2.

Abstract: A solvent extraction process is provided for transferring metal values from one immiscible liquid phase to another, whereby the two liquid phases are vigorously mixed together in a first mixer under conditions in which one liquid phase is rendered continuous, the mixing being continued to effect complete transfer of metal values, and the mixture then passed to a second mixer and the two phases mixed under conditions in which the other phase is rendered continuous, whereby when the two phases are fed to a settler, the rate of disengagement of the two immiscible liquids is substantially increased.

Abstract: A process and system are provided for flash-sublimation of molybdic oxide containing slag-forming constituents. The process comprises feeding a pneumatically suspended stream of particulate molybdic oxide and a mixture of fuel and oxidizing gases through a nozzle into a confined furnace chamber, the fuel gas-oxidizing gas mixture exiting from the nozzle being ignited to provide a flame thereof, the flame being maintained at a condition to provide a temperature in the furnace chamber in excess of that required to sublime molybdic oxide. The temperature is preferably at least sufficient to melt slag-forming constituents contained in said molybdic oxide such that the slag formed is sufficiently liquid to separate from the gaseous mixture and collect at a selected portion of the chamber for removal therefrom.

Abstract: A method is disclosed for the intermediate reduction of a molybdenum compound selected from the group consisting of MoO.sub.3 and ammonium molybdate to MoO.sub.2. The molybdenum compound is fed to an indirectly fired inclined rotary calciner and uncracked ammonia caused to flow to the rotary calciner either concurrently or countercurrently to the flow of the molybdenum compound. The residence time and temperature are controlled to produce MoO.sub.2 at a conversion efficiency of at least about 80%.

Abstract: A method is provided for conditioning nickel laterite pregnant leach liquor in preparation for the recovery of nickel therefrom in which pregnant leach liquor is mixed in a reaction vessel under atmospheric pressure with an amount of roasted high-magnesium nickeliferous silicate ore to form a pulp thereof, the amount of roasted ore being at least sufficient to lower the free acid content of pregnant liquor entering the thickener to a level corresponding to a pH ranging from about 1.8 to 3. The pregnant liquor is conditioned by stirring the pulp thereof at a temperature not exceeding 100.degree. C. for a time sufficient to lower the free acid content of the resulting conditioned pregnant liquor to the desired level and to effect substantial precipitation of iron as iron hydroxide and dissolved silica in the liquor.

Abstract: Molybdenum is recovered from an organic material, such as a spent epoxidation catalyst, by heating the material in a stream of non-oxidizing gas at a temperature of at least about 400.degree. C. to evolve the organic in the gas stream from which it is recovered and to leave a powdery residue containing essentially all of the molybdenum.

Abstract: A process wherein nickel in an aqueous stream is recovered as nickel sulfide by precipitation in an autoclave with pressurized hydrogen sulfide in the presence of a large quantity of recycled fine nickel sulfide seed material is improved when operated under continuous conditions by introducing into the autoclave a small, controlled quantity of supplemental seed material designed to maintain the seed surface area within required limits.

Abstract: Directed to a corrosion resistant alloy particularly designed for use in power plant exhaust gas scrubbers which contains about 0.015% to about 0.025% carbon, not more than about 1% manganese, not more than about 0.3% silicon, about 19% to about 22% chromium, about 8.5% to about 9.5% molybdenum, about 30% to about 42% nickel, up to about 0.2% nitrogen, with the nickel and nitrogen contents being so related that at about 30% nickel, the nitrogen content is at least about 0.15%, while at a nickel content of at least about 40%, the nitrogen content does not exceed about 0.03%, the balance being essentially iron, with the iron content in the range of about 28% to about 40%.

Abstract: Ultrafine cobalt and nickel powders are produced from sulfate solutions containing ammonia under hydrogen pressure in the presence of a small amount of a reductant from the group consisting of metal hydrides, metal borohydrides and metal borides. Cobalt powders having a particle size of about 2 micrometers produced in accordance with the invention have been used successfully in the production of cobalt-cemented tungsten carbide.

Abstract: A process is provided for removing hexavalent selenium from an acidic sulfate solution containing at least one metal ion from the group consisting of nickel, cobalt and copper at ambient pressure and at a temperature not exceeding the boiling point of the solution. The solution is treated with an agent from the group consisting of a compound which will produce nascent hydrogen in the solution and finely divided metal from the group consisting of nickel, cobalt and copper resulting from in situ precipitation of the metal in the acid sulfate solution. Thus, following treatment with the compound, the hexavalent selenium is reduced to a form separable from the solution by solid-liquid separation.

Abstract: Varnish-bonded, carbon-coated metal granules are provided, the metal granules being preferably selected from the group consisting of magnesium, aluminum and alloys thereof. The coating may optionally contain at least one calcium compound, e.g., at least one calcium compound selected from the group consisting of CaO, CaCO.sub.3, CaC.sub.2, CaSiO.sub.3, CaSi.sub.2, CaAl.sub.2 O.sub.4, portland cement and CaF.sub.2.

Abstract: An article of manufacture is provided comprising a heat treated high strength low-alloy steel tubular product of the L-80 and N-80 type suitable for use as an oil well tubular member. The composition consists essentially of about 0.1 to 0.4% C, about 0.075 to 0.4% Mo, about 0.002 to 0.03% N, about 0.75 to 1.5% Mn, about 0.1 to 0.4% Si, and the balance essentially iron, the carbon and molybdenum contents being controlled and correlated such that for a carbon content ranging from about 0.1 to 0.25%, the molybdenum content ranges from about 0.075 to 0.25%; and for a carbon content ranging from about 0.25 to 0.4%, the molybdenum content ranges from about 0.2 to 0.4%.

Abstract: A process is provided wherein metal granules coated with a polymerizable oil are heated, while being mechanically mixed, to a polymerizing temperature to convert the oil coating to a varnish and the varnish coating thereafter heated to a higher temperature to decompose at least partially the varnish to carbon, thereby producing a carbon coating strongly bonded to the metal granules. The temperatures employed are below the melting point of the metal granules. The coating is preferably applied to magnesium, aluminum or alloys thereof for use as addition agents in steel, e.g., desulfurizing or deoxidizing agents, and may contain fine particles of at least one calcium compound.

Abstract: An electrolytic process is provided for the recovery of lithium values from a molten salt bath containing MgCl.sub.2, CaCl.sub.2, NaCl, KCl and LiCl. The salt composition in the molten state is subjected to the sequential depletion by electrolysis of the elements Mg, Ca, Na, respectively, either in substantially the elemental form or as an alloy thereof under multistage operating conditions to provide a depleted salt composition comprised substantially of the binary LiCl-KCl from which lithium is subsequently recovered by electrolysis as lithium per se or an alloy of Al/Li.

Abstract: A method for cleaning fine coal is provided which includes: mixing the coal with a fluid of such a specific gravity that clean coal particles would float while refuse particles would sink therein, pretreating the coal-fluid slurry by adding a surfactant, subjecting the mixture to ultrasonic dispersion, and separating the entire mixture into higher and lower specific gravity fluid streams by means of centrifugal separation. The fluid of the chosen specific gravity and the surfactant may be recovered from the fluid streams and recycled if desired.

Abstract: A method is provided for treating molybdenum concentrates in a roasting furnace having a first roasting zone and at least a second roasting zone, the concentrate containing residual flotation oil in an amount over 2% by weight which during roasting inhibits the roasting capacity of the furnace. The improvement resides in deoiling the molybdenite concentrate, feeding the deoiled concentrate to the first roasting zone, and applying heat to the concentrate in the first roasting zone, including the sensible heat of the concentrate and heat generated by extraneous fuel, sufficient to heat the concentrate to a roasting temperature sufficiently high to initiate a substantially self-sustaining roasting reaction but not exceeding about 1250.degree. F. The amount of heat generated by combustion of the extraneous fuel is not substantially in excess of that required to heat the concentrate to the temperature at which self-sustaining roasting reactions are initiated in the first roasting zone.

Abstract: A cathode matrix is provided for producing dislodgeable metal slugs of electrolytically deposited metal comprising a laminar metal substrate having an array of raised bosses with exposed flat faces distributed over the substrate and integral therewith. The total surface of the cathode is covered by an adherent layer of an electrolyte resistant, substantially impermeable, low electrical conductivity material, such as fluorinated hydrocarbon, except for the exposed faces of the bosses, the exposed faces being adapted to receive electrodeposited metal thereon.

Abstract: An electronic coupled-in-motion railroad track scale is disclosed and comprises four track logic switches for detecting forward or backward train axle movement, a programmable digital voltmeter connected to load cells for effecting the weighing of the train cars, and a computer (CPU) for controlling the voltmeter as well as the track logic switches, and for correlating the axle numbers to the weight determined for each particular car. The four track switches are situated such that two switches are located in close proximity on either end of the weighbridge and the train track interface. Together with the logic circuits, the switches indicate when an axle comes on or goes off the weighbridge, and in which direction the axle is moving. In this manner, if reweighing is desired, the train may be backed up or forwarded to the particular car in question without reweighing the entire train.