Abstract: A method for increasing the wet bulk density of coking coal charges for code ovens which charges contain at least about 6 and as much as 13 weight percent moisture, to an optimum level of between about 47 and 50 pounds per cubic foot (753 to 801 kg per cubic meter) and for controlling and maintaining the bulk density at such optimum levels, the method including:(a) forming a 5 to 20 weight percent aqueous dispersion of a surfactant having a desired viscosity, and(b) applying a quantity of the aqueous dispersion to a quantity of coal equivalent to between about 0.5 and 2.5 pounds (0.227 and 1.135 kg) of surfactant per ton (907.2 kg) of coal,the surfactant being an alkylphenoxypoly (ethyleneoxy) ethanol having a general formula: ##STR1## where R is an alkyl group having between about 8 and 12 carbon atoms, andn is an integer between 2 and 30,and is characterized by an HLB number in the range of about 4 and 18.

Abstract: Method and apparatus for aligning spray nozzles which have been disposed to apply a liquid coolant in a desired pattern on a target area. The invention includes the use of a light beam projected onto the target area to indicate any misalignment and the provision of means to adjust the spray nozzles so that the adjusted position results in a desired pattern of distribution of liquid coolant on a target area.

Abstract: An adaptor to facilitate the testing of a lamp holder has a body portion with a probe at one end for straight line movement into and out of a lamp holder socket. The probe has an electrically conductive tip for contacting the hot lead of the socket. The probe also has a band of electrically conductive material for contacting the neutral lead of the socket. A spring clip attached to the body is positioned to contact the ground lead of the lamp holder. The adaptor also includes a three-hole receptacle electrically connected to the tip, band and spring clip.

Abstract: Coke guide and coke oven infrared pyrometer degrading is minimized to continuously permit better accuracy and reliability in hostile environment of coke mass and heat, dust and/or dirt present in many coke plant areas. These benefits are obtained using production-worthy pyrometer equipment having a purged pyrometer with any of three window cleanliness monitors to determine errors and automatically correcting for same through self-calibration.

Abstract: The iron oxide paint pigment precursor used in a process for producing such paint pigment is found in scarfer spittings, a steel mill waste product. The cores are characterized by a chemical composition comprised of between about 0.04 and 0.10 weight percent carbon, about 0.06 and 0.25 weight percent manganese, about 0.015 and 0.025 weight percent phosphorus, less than about 0.05 weight percent silicon, less than 0.01 weight percent sulfur, about 94 and 98 weight percent iron and the remainder oxygen and incidental impurities and a particle size within the range of 5 mm to 0.125 mm.

Abstract: A cast ceramic hearth door and frame which provides a one-piece ceramic frame with provisions for a door to be slideably disposed within the one-piece frame.

Abstract: Apparatus and method for making a transition plate for a mine roof truss from a strip of metal includes a die set having a first and second station. In the first station the strip of metal is bent downwardly at its sides, a notch is sheared in both sides of the strip and two holes are pierced through the strip. In the second station the transition plate is completed by bending the leading portion of the strip into an "M" shaped saddle portion, the strip is sheared transversely and bent downwardly at its trailing end.

Abstract: A method for separating carbon and iron bearing particles from zinc and lead bearing particles contained in an aqueous slurry of blast furnace dust and the recovery and reuse of the carbon and iron bearing particles as charge material in a blast furnace is described.An aqueous slurry of blast furnace flue dust is collected in a thickener. The thickened aqueous slurry is strained to remove large foreign matter and make a size separation at about 4 mm. The plus 4 mm particles are generally wasted. The aqueous slurry containing the minus 4 mm particles is fed into at least one hydrocyclone where a size separation is made at between about 3 and 5 microns. A substantial portion of the carbon and iron bearing particles report to the hydrocyclone underflow and a substantial portion of the zinc and lead bearing particles report to the hydrocyclone overflow. The carbon and iron bearing particles are passed to a preparation plant to be prepared for reuse in the blast furnace.

Abstract: A continuously measuring on-line production gage calibrated to indicate bar weight per foot and unaffected by typical reinforcing bar shape variability utilizes two radiation gages with their measuring axes separated by 90 degrees and offset by 45 degrees from the rib plane of the reinforcing bar. Each gage is equipped with a shutter which may be adjusted electrically to simulate any required weight per foot standard and with the gage zeroing on a predetermined shutter setting, the shutter automatically opens and radiation detector signal variations from the zero point are amplified, linearized, averaged, and scaled electronically to produce a percent weight per foot output signal. Summation of detected radiation is also performed through use of optical fibers.

Abstract: A nondestructive eddy current or ultrasonic articulated probe mechanism automatically detects rolling mill roll surface defects for use with a defect test system. The articulated probe mechanism is mounted on a traversing roll grinder carriage, is automatically positioned over the test roll, and has a probe head with controlled fluid bearing, air or liquid, to automatically maintain probe head-to-test roll gap. One or multiple eddy current, or ultrasonic, probes in the head generate anomoly test signals which, together with a probe head temperature sensor signal, are suitable for processing in an appropriate test instrument.

Abstract: Method and apparatus for rotating elongated workpieces on a support bed to present successive faces for inspection and/or treatment of the workpiece. Safe means are provided for rotating hot or cold billets on a support bed in a manner that uses a minimum of manpower while handling pieces of considerable length and weight.

Abstract: The occurrence of defects on wire coated with an aluminum-zinc alloy coating applied by hot dipping in a molten coating bath is substantially decreased by preventing the deposition of zinc powder particles upon the surface of the molten aluminum-zinc coating prior to solidification of the coating. The deposition of metallic zinc powder particles upon the molten aluminum-zinc coating may be alleviated in several different manners, including preventing the formation of the zinc powder, preventing the accumulation of the zinc powder upon the surface of the molten aluminum-zinc bath, decomposing the zinc powder before it accumulates and exhausting or removing the zinc powder from the vicinity of the molten metal coated wire as it leaves the molten bath. Several novel apparatus arrangements for accomplishing the above are disclosed.

Abstract: A pivotable probe arm in a batch hopper automatically indicates when the hopper is empty, and in an alternate embodiment, also automatically closes the discharge opening when the hopper is empty.

Abstract: A coke oven leveling bar is provided with downwardly tapered side members and cross plates to form a plurality of coal receiving pockets having a bottom opening larger than a top opening to minimize arching of coal within the coal receiving pockets.

Abstract: A dry-nozzle gunning refractory composition consisting essentially of magnesia grains from crushed used refractory bricks, sodium bentonite clay, and a binder consisting essentially of a mixture of anhydrous sodium silicate particles and hydrated sodium silicate particles.

Abstract: A process for producing a killed, low carbon, columbium, boron alloy steel characterized by high strength and an unbanded ferrous microstructure in the as-rolled condition. The steel is hot rolled to form an intermediate section before the steel temperature reaches 1650.degree. F. Below 1650.degree. F, the steel is further reduced with a total minimum reduction of 50% in one embodiment, and 35% in a second embodiment, and in the Ar.sub.3 -Ar.sub.1 temperature range, reduction is a plurality of reduction passes under conditions to permit substantial recrystallization of deformed grains after each pass, with a finishing temperature between 1100.degree.-1150.degree. F in one embodiment, and a finishing temperature between 1350.degree. F and Ar.sub.1 in a second embodiment.

Abstract: A low-alloy tool steel, for dies and molds, is deep hardening and highly machinable in the hardened condition. The steel is a water-quenched composition containing boron, sulfur, at least 0.020% aluminum, and a minimum of hardening agents including chromium and molybdenum. The method of producing such steel is disclosed.

Abstract: A single regenerative coke oven battery is constructed and operated as a plurality of individual and separate groups of heating walls, each group capable of independent reversal and heating cycles. During slow-down operations, one or more of the individual groups of heating walls is shut down for a preselected time period, with no flow of combustion air, fuel and waste gas in the heating walls, while the remainder of the groups are operated at substantially full air and gas flow. The battery is capable of a slow-down operation while avoiding uneven coking and variations in the amount of byproduct coke oven fuel gas generated.

Abstract: An ultra-high strength steel composition of matter having a substantially martensitic matrix with a dispersion therein of a critical amount of metal oxide particles and characterized by increased resistance to environmental stress corrosion cracking. The metal oxide particles are selected from the group consisting of CaO, BaO, MgO, SrO and mixtures thereof, in the range of 0.1 to less than 3 mole percent. A powder metallurgy process to produce articles of manufacture from the composition of matter is disclosed.