Abstract: An improved hardenable inorganic grouting composition comprising (1) a dry inorganic cement powder, (2) liquid containing capsules, and wherein the liquid is reactive with the inorganic cement, and wherein the capsules are pressure sensitive and capable of being progressively ruptured by the force of the anchor element, and (3) a small amount of a lubricant in such form and amount to allow the cement powder and the capsules to flow as free flowing solids. This grouting composition is preferably in the form of a cartridge having an elongated tubular casing.

Abstract: Large diameter pipes or culverts carrying water or other corrosion producing liquids are cathodically protected by securing, spaced-apart, segment-like elements along the bottom inner (invert) surface of the pipe to effect a partial damming of the liquid therein, causing such surface to remain wet during periods in which the input of liquid is substantially decreased or halted. The achievement of such a continuously wet invert surface provides continuous electrolyte conduction, resulting in both (a) enhanced corrosion protection and (b) greater efficiency in use of the protective anodes.

Abstract: Method and apparatus for the suppression of fume from a body of molten metal is described. The method involves the blanketing of the molten metal bath with a mixture of pressurized inert gas and finely divided or atomized particles of water. The inert gas may be argon, nitrogen or steam. Apparatus particularly adapted for performing the disclosed method is also described.

Abstract: An automatic overhead trolley-driven magnetizing system for inducing a residual magnetic field in seamless steel pipe in order to detect non-visual defects therein by the magnetic particle inspection method is described. The magnetizing system consists of a trolley-driven magnetizing unit which moves on an overhead runway until a retractable limit switch causes the unit to stop upon reaching the trailing end of the pipe, an electrical contact pad then lowers onto the surface of the pipe, and introduces a magnetizing current to the pipe sufficient to cause magnetic particles deposited on the pipe surface to indicate the location of defects in the pipe. The magnetizing system is arranged to remain remote from the manufacturing flow path of the workpiece until the magnetization thereof is required.

Abstract: A method for decreasing the extent of crop loss during rolling of ingots to semifinished products, such as slabs and blooms, in which a lighter than usual draft is taken during the odd pass, i.e. as the ingot bottom enters the rolls. During the subsequent even pass, as the ingot top enters the rolls, the draft taken is of the usual order of magnitude. These steps of alternate light and heavy passes are conducted until the ingot thickness is about twice the length of the maximum practically achievable contact arc--then the normal drafting sequence is utilized. A yield gain of about 1% or greater may thus be achieved by using such controlled counter-drafting.

Abstract: Anchor organization for a layer of refractory material deposited on a refractory furnace lining. The organization includes a number of non-metallic refractory anchors disposed at spaced locations about the furnace lining surface. The anchors are provided with a particular configuration that includes a concave locking surface on each end providing a refractory-retention function. Each anchor has one end cemented into a hole in the lining and the other end immersed in the cementitious refractory material that is deposited on the surface of the furnace lining. A plunger tool is also disclosed for use in inserting the anchor and cement into a hole in the lining.

Abstract: A process for the purification of the low-boiling constituents of a compresed gas mixture, such as a mixture comprising a carbonaceous gas, by cooling to low temperatures in cyclical alternated regenerators to condense high-boiling constituents of the gas mixture comprising (1) passing the gas mixture through a first regenerator from the warm end to the cold end of the same to cool the gas mixture and to condense the high-boiling constituents of the mixture thereby producing a purified gas stream; (2) passing a scavenging gas which is at a lower pressure than said gas mixture in the first regenerator through a second regenerator from the cold end to the warm end of the same to clean this second regenerator and to re-evaporate the high-boiling constituents, (3) passing at least part of the purified gas stream through a third regenerator from the cold end to the warm end of the same to re-cool this third regenerator, preferably to the temperature of the first regenerator, and (4) compressing and recycling at le

Abstract: A drawing and ironing process is disclosed for making unitary can bodies from blackplate, or non-tinned steel, utilizing a novel composition comprising finely-divided molybdenum disulfide, an acrylic ester/arcylic acid polymer and a polyethylene or similar wax, in an aqueous medium.

Abstract: The present invention involves improvements in reciprocable pumps. In one aspect, applicable to single action pumps, a quick release mounting means is provided for attaching a fluid end piece to a power frame. The frame has a tapered opening for receiving a barrel portion of the fluid end therein. A wedge device of mateable taper with the opening connects the barrel securely to the frame. The wedge extends around the transverse outer periphery of the barrel portion. Another aspect of the invention involves providing axially rotatable intake or exhaust manifolds. In a multiplex pump, the manifold may be rotatable as a unit, or the section for each conduit may be separately rotatable. This feature permits easier handling when making repairs, especially on larger pumps. Finally, in pumps having non-vertical suction or discharge passages, the valve counterbores are tilted toward a vertical direction, but not more than an angle at which straight-line machining of the suction or discharge passage is still possible.

Abstract: In the hot-dip coating utilizing molten metals in which the partial pressure of the metal vapor is substantial at the coating temperature, the resultant metal vapor in the snout area over the metal bath tends to cause pinhole type imperfections on the resultant coating. For example, substantial vaporization occurs during high temperature galvanizing and during hot-dip coating of Al-Zn, in which Al is a major constituent, such that the bath must be maintained at a high enough temperature to keep the aluminum molten. The accumulation of such vapors inside the snout area is minimized by (i) utilizing baffles within the snout to isolate it as much as possible from the cooling section of the annealing furnace, and (ii) venting a portion of the gas from the snout.

Abstract: A method and apparatus for the control of the precoating process employed in an effluent filtration baghouse are described. An electrically operated pressure switch is provided to indicate the precoat duct vacuum pressure by measuring the vacuum pressure of the clean side of the baghouse. Should a precoat duct pressure insufficient to sustain the flow of precoat material be indicated, the pressure switch will halt the feed of precoat material into the precoat duct, thus avoiding the congestion of the precoat duct by the precoat material and the consequent inadequate precoating of the baghouse bags.

Abstract: In a metal refining process where oxygen is blown into the molten melt from both above and below, the oxygen serving to remove carbon impurities from the melt, and carbon monoxide being emitted from the melt and burned by the oxygen from above so as to add heat to the melt, the improvement in which the oxygen from above is introduced at a location exterior to an opening in a vessel above the melt. The invention is particularly suited for use with the Q-BOP steelmaking process.

Abstract: The invention is of a method for minimizing slag carryover when draining molten metal from a furnace and an article for use in the method. This article is a polyhedral-shaped body having density intermediate that of the slag and metal. When thrown onto the surface of the slag within a restricted area over the taphole, the body will float at the slag-metal interface, and tend to lodge with one of its corners projecting into the taphole as the final portion of remaining metal drains out of the furnace. The shape of the body and its dimensions are selected so as to only partially block the taphole opening, causing flaring of the stream so as to signal a furnace operator of the impending flow of slag from the furnace. The operator then shuts off flow to prevent carryover of slag onto the molten metal already tapped. Since only the edges of the body contact the taphole of the body does not become welded to the wall of the taphole and therefore is easily dislodged without loss of time between heats.

Abstract: A method is described for suppressing fume generated in the transfer of molten metal to a receiver. The involved method entails burning fuel in the immediate vicinity of the molten bath within the receiver to consume and/or displace ambient air thereby to starve the bath of oxygen and, concomitantly, to suppress the formation of the fume-producing metallic oxide.

Abstract: Hot-dip coated steel articles having a coating containing about 55% aluminum, 43% zinc, 2% silicon, are known to exhibit an optimum combination of general corrosion resistance, more durable than zinc coatings; while providing more galvanic protection to cut edges and areas of mechanical damage than hot-dip aluminum coatings. It has now been found that coatings containing 12 to 24% zinc, up to 4% silicon, balance aluminum, provide galvanic protection equal to or superior to such known coatings, while providing enhanced general corrosion resistance, approaching that of aluminum coatings.

Abstract: Carbonyl sulfide is removed from propylene by hydrolysis over a catalyst comprising platinum sulfide on alumina. Specifically, the propylene is passed through, successively, a C.sub.3 -splitter, a heater, the platinum sulfide catalyst bed, and a topping still where the resulting H.sub.2 S and CO.sub.2 are separated from the purified propylene.

Abstract: The improvement in a walking beam oil country tube reheat furnace comprises a first row of burners positioned in spaced relationship and transverse the furnace hearth with each of the burners containing a refractory housing positioned in the limited space between the walking beam pass line and the hearth of the furnace. The burner includes a burner body and a centrally disposed fuel tube so as to define an annular air chamber thereabout. The burner includes a 90.degree. bend so as to fire in parallel relationship to the pass line. The method of retrofitting a top fired walking beam furnace includes inserting at least one unitized bung of said spaced burners through the furnace floor and into the space between the pass line and floor and firing the burners in parallel relationship with the pass line.

Abstract: Diphenylamine is made by the reaction in the vapor phase of two moles of aniline with the consequent evolution of ammonia; surprisingly high yields and selectivities are obtained by maintaining a significant concentration of ammonia in the catalyst zone, preferably by using the ammonia as a carrier for the aniline.

Abstract: An apparatus for removing adherent magnetically attracted particles from the surface of the magnetic head pulley of the conveyor belt used in a dry magnetic separator without disrupting the magnetic separation process. An array of magnetically soft iron tines of several sizes is provided to be moved into and out of close proximity with and substantially normal to the magnetic head pulley surface. When in proximity to the magnetic head pulley, the soft iron tines are induced with a magnetic force and because of their shape, a magnetic field gradient is formed in the direction of the tines having a force sufficient to attract the particles from the head pulley to the tines. When the tines are moved away from proximity with the head pulley, they lose most of their induced magnetism and the attracted particles fall into a discharge chute or collection box.

Abstract: A method is provided for preventing distortion of a heated cylindrical metal workpiece during cooling. The method includes heating the workpiece and then placing a fixture substantially at room temperature in the workpiece. The fixture has a plurality of axially-spaced holder plates with shoe members slidably mounted at spaced locations on the plates. A plurality of tapered pin assemblies are used to secure each shoe member in fixed position initially so as to define the desired cold shape of the workpiece. The workpiece is then cooled with the fixture in place. After cooling of the workpiece, the tapered pin assemblies are partially withdrawn from tapered holes in the shoe members and holder plates so as to permit removal of the fixture from the workpiece.