Abstract: An apparatus for manufacturing a sintered body with high density comprises: a table having an object to be processed laid thereon; a pressure vessel accommodating a heat element heating the object around and a heat-insulating mantle surrounding the heat element; supply device for supplying to the pressure vessel an extractant which extracts a binder or a dispersion medium contained in the object, exhaust device for exhausting the extractant and an extracted substance from the pressure vessel; pressure device for raising a pressure in the pressure vessel, and vacuum means for evacuating the pressure vessel. The apparatus enables carrying out the three steps of drying or degreasing, sintering and hot isostatic pressing of the object once put in the pressure vessel without handling the object outside the vessel. The object is formed as a compact in the preprocess in advance of being put in the apparatus.

Abstract: A method for manufacturing agglomerates of fired pellets comprising the steps of: the first pelletization step of adding and mixing fluxes to fine iron ores containing 30 to 95 wt. % of those of 0.125 mm or less in particle size to form a mixture and to pelletize the mixture into green pellets; the second pelletization step of adding powder cokes containing 80 to 100 wt. % of those of 1 mm or less in particle size to the green pellets, in amount of 2.5 to 4.0 wt. % to the fine iron ores, to prepare, through pelletization, green pellets coated with the powder cokes; and the sintering step of charging the green pellets coated with the powder cokes into a grate type sintering machine to manufacture the agglomerates of fired pellets. And furthermore, in another method for manufacturing agglomerated of fired pellets, fine iron ores containing 10 to 80 wt. % of those of 0.044 mm or less in particle size and powder cokes containing 20 to 70 wt. % of those of 1 mm or less in particle size are used.

Abstract: A linearly polarized light beam is applied to the surface of a film and is reflected therefrom. The beam is then split into three light beams by three or four optical flats. These light beams are applied to photoelectric conversion devices after passing through analyzers with fixed analyzing angles. The photoelectric conversion devices convert the beams into electric signals representing the intensities of these light beams. Two ellipsometric parameters .psi. and .DELTA. are calculated from these three electric signals.

Abstract: An apparatus for forming epitaxial layers, comprises a first susceptor disposed in a reaction furnace and having an outer periphery constituted by a heat reflection material and capable of supporting a plurality of semiconductor wafers, a second susceptor disposed coaxially with the first susceptor such as to surround the first susceptor at a predetermined space therefrom and having an inner periphery constituted by a heat reflection material and capable of supporting a plurality of semiconductor wafers such that these semiconductor wafers face the semiconductor wafers supported by the first susceptor, and a pair of heat reflection members disposed in the reaction furnace between the outer periphery of the first susceptor and the inner periphery of the second susceptor. The first and second susceptors are rotated in mutually opposite directions about a common vertical axis during an epitaxial growing process.

Abstract: A method for removing hydrogen chloride from an exhaust gas discharged from an incinerator, which comprises the steps of: causing hydrogen chloride contained in an exhaust gas discharged from an incinerator to react with slaked lime in slurry to form basic calcium chloride; detecting a concentration (y) of hydrogen chloride remaining in the exhaust gas after the reaction with slaked lime; determining a deviation (.DELTA.y) of the thus detected concentration (y) of hydrogen chloride from a target concentration (y.sub.o) thereof; determining a corrected deviation (.DELTA.y') by adding to the above-mentioned deviation (.DELTA.y) a correction value (.DELTA.y.sub.1) calculated in accordance with the following formulae:.DELTA.y.sub.1 =-G.sub. p(S)(1-e.sup.- LS)U (1).DELTA.y'=.DELTA.y+.DELTA.y.sub.1 (2)where,G.sub.p (S): a transfer function representing a first order lag,e.sup.-i LS : a transfer function representing a dead time, andU: a target amount of supply of slaked lime, which renders the deviation (.DELTA.

Abstract: A method for operating a blast furnace, comprising the steps: charging iron ores and cokes through a furnace top into the blast furnace; blowing in gas containing 40 vol. % or more oxygen together with pulverized coal through tuyeres into the blast furnance; and controlling a fuel ratio within a range of 500 to 930 kg/ton., molten pig iron and still a ratio of the pulverized coal blown in through the tuyeres within a range satisfying the formula: ##EQU1## molten pig iron, where X represents a fuel ratio. Through blown-in inlets set in the furnace shaft, preheating gas is blown in to preheat burdens. The cokes charged into the blast furnace are cokes of low strength having a drum index of DI.sub.15.sup.30 of 80 to 90% .

Abstract: A method is provided for manufacturing a sintered body comprising the steps of: heating a membrane of an inorganic polysilazane in liquid formed on the surface of a porous body to oxidize a surface portion of the layer into an oxide layer and still pyrolyzing the remaining of the inorganic polysilazane, the inorganic polysilazane having the formula of (--SiH.sub.2 NH--)n where n represents the degree of polymerization; softening the oxide layer to make it impermeable; and sintering the porous body with the oxide layer having impermeability at high pressure and at high temperature n of degree of polymerization ranges 6 to 25. The layer is of 0.5 to 2.0 mm in thickness.

Abstract: A composite zinc-silica electro-galvanized steel sheet excellent in corrosion resistance, having on at least one surface thereof a zinciferous plating layer, preferably in an amount of from 5 to 100 g/m.sup.2 per side thereof, into which silica particles are dispersed. The above-mentioned plating layer consists essentially of:silica particles: from 0.1 to 20 wt. %,nitrogen compounds: from 0.0005 to 0.5 wt. % as converted into nitrogen,and the balance being zinc and incidental impurities.The above-mentioned plating layer further additionally contains as required at least one element selected from the group consisting of:iron: from 2 to 80 wt. %,nickel: from 2 to 25 wt. %,cobalt: from 0.1 to 5 wt. %, andchromium: from 0.5 to 20 wt. %.The total amount of the above-mentioned at least one element thus additionally contained is limited to up to 80 wt. %.

Abstract: An ordinarily made thin steel sheet is placed in an atmosphere bearing SiCl.sub.4, and subjecting to Si penetrating treatment at temperatures between 1100.degree. C. and 1200.degree. C. for a determined period of time. A heating rate is used which is more than 50.degree. C./sec at the temperatures of more than 1000.degree. C. in the SiCl.sub.4 atmosphere.Thereby, it is possible to manufacture thin steel sheet of high magnetic permeability without internal defects.

Abstract: A tundish nozzle is independent from a tundish so that thermal deformations of the tundish are not transmitted to the tundish nozzle.

Abstract: A sucker rod coupling pin comprises a hole into which the sucker rod is to be inserted, and has a plurality of annular depressions which surround the inner wall of the hole. As viewed crosswise, the annular depressions respectively have tapered surface portions arranged in series from the open end to the closed end of the coupling pin hole. The tapered surface portions whose cross sections progressively increase toward the closed end of the coupling pin hole have their respective lengths progressively shortened in relation to the preceding tapered portion, toward the closed end of the coupling pin hole, and the angle of inclination of the respective tapered surface portions progressively increases toward the closed end of the coupling pin hole.

Abstract: When low-quality iron ore is used as a coal liquefaction catalyst, in order to improve its catalytic activity it is subjected to one or a combination of reduction, heat-treatment, or washing with or immersion in water for a long period of time so as to remove catalyst poisons before it is used as a catalyst. When high-quality iron ore is used, it is first reduced with carbon monoxide and then used as a catalyst.

Abstract: A covering is applied onto the outer surface of a pile including a steel pipe or the like to surround a predetermined length thereof so as to reduce a frost heaving force or negative friction acting on the pile in a frigid area. The covering is closely adhered by an adhesion layer the like to the pile over a given length thereof. This given length is between 0.5 and 5 m. The covering member includes a smooth-surfaced plastic covering or elastic covering. A rugged surface covering may be provided below the smooth surfaced covering.

Abstract: Described is the method of producing the super needle coke from graphite electrodes, wherein the starting material derived from coal tar or the starting material derived from coal tar and containing less than 0.1 weight percent of the dry sludges or quinoline insolubles is subjected to hydrogenation in the present of hydrogenation catalyst to give the hydrogenated oil which is further subjected to thermal cracking under the controlled condition and non-volatile components contained in thermally cracked oil are removed to give the starting coking material from the distillate these of which is subjected to delayed coking.The thermal cracking conditions are selected from the conditions in which the pressure range is up to 3.9 MPa (40 kg/cm.sup.2 G.). The temperature is 470.degree. to 520.degree. C. and the cold residence time is to to 350 seconds, while the coking conditions are selected from the conditions in which the temperature ranged is over 450.degree. to 465.degree. C. and the pressure range is over 0.

Abstract: An ultrathin steel foil which is suited for use as an electromagnetic wave shielding material and which is excellent in shielding properties, is provided by cold rolling to be 31% to 90% reduction and anneal at 600.degree. to 950.degree. C. for 1 hour of a steel material having specific chemical composition including C of less than 0.01% and specified grain diameter of between 20 to 80 .mu.m, and thicknesses of between 20 to 100 .mu.m.

Abstract: Mini-pellets made of raw materials of fine powder iron ores are indurated, and effected with diffusion bond. A plurality of said treated mini-pellets are combined with calcium ferrites at the surface layers thereof. Thus, agglomerated ores are produced, wherein main grain sizes of said fine powder iron ores are not more than 5 mm, and are subjected to a primary pelletization with flux, and solid fuels are coated in a secondary pelletization to produce the mini-pellets of 3 to 9 mm diameter, and the produced mini-pellets are undertaken with induration in a travelling grate typed sintering furnace.Depending upon the present agglomerated ores and the producing method therefor, the raw materials may be selected from a wide range of grain sizes, and a blow faculty is enough to be small, and producing yield of the agglomerated ores may be increased, having improved qualities of high RI and low RDI.

Abstract: In a mold apparatus for an endless track type continuous casting machine of the type in which a plurality of cooling blocks are interconnected with each other in the form of an endless chain to assemble a cooling block chain which can define a straight wall; a pair of said cooling block chains are disposed such that the straight wall thereof define a mold; and the cooling block chains are moved in synchronism with the casting speed or rate, a plurality of cooling holes are extended through each cooling block in the direction perpendicular to the direction of the movement thereof and in parallel with the straight wall section thereof; one or more cooling water pipes are disposed along one side surface of said straight wall section of each cooling block chain and are provided with a plurality of nozzles in line with the cooling holes of the cooling blocks so that the cooling water is injected through the nozzles to their corresponding cooling holes of the cooling blocks which are moving, thereby cooling the coo

Abstract: An apparatus for producing an artificial wave, which comprises: an embankment provided in the sea in parallel to a shore so that the upper portion thereof is exposed above the sea, the embankment having on the off-shore side thereof a slope for causing sea water to crawl up over the embankment in the form of a wave, and on the inshore side thereof a vertical surfaces; a tank, having an open upper end, fitted to the embankment so as to be vertically movable along the vertical surface thereof, the tank having a capacity sufficient to receive sea water having crawled up over the slope of the embankment a plurality of times through the open upper end, a side wall on the inshore side of the tank being capable of being opened and closed; a main buoy, fixed onto a bottom wall of the tank, having buoyancy sufficient to cause substantially the entire of the tank to float up above the sea; and a tank supporting mechanism having a function of supporting the tank at a prescribed position above the sea, the tank supportin

Abstract: A .beta. type titanium alloy material is passed through processes and heating treatments of cold working--intermediate solution treatment--final cold working--final solution treatment--aging. In this process, a structure, which has been provided with strains by the cold working performed prior to the final cold working, will be changed into a recrystallized structure by carrying out the intermediate solution treatment, where uniform and fine micro substructure of dislocations, remain with grains. If such an intermediate solution-treated material is processed with a slight cold working by the final cold working and further with the solution treatment, only a recovery phenomenon progresses, and it is possible to provide such a micro substructure containing more uniform and finer dislocation network not only in grains but also in grain boundaries. Therefore, in the aging, expedition of precipitation and uniform distribution of .alpha.

Abstract: A method for manufacturing molten steel wherein iron ore and coal are continuously supplied onto molten metal containing carbon of 1% or less while blowing oxygen gas is being introduced onto the molten metal through a lance. Simultaneously with this operation, stirring gas is being introduced into the molten metal at a rate of 0.05 to 0.5 Nm.sup.3 /min/ton of molten metal through a tuyere. The slag and the molten steel produced, is continuously or periodically discharged.