摘要:
A method of removing a nitrogen oxide from an exhaust containing the same which comprises preparing an absorbent solution by adding divalent copper ions alone or a mixture of the divalent copper ions and divalent manganese ions to an acid aqueous solution containing sulfites or acid sulfites of ammonium, alkaline metals, or alkaline earth metals or a mixture of two or more of these compounds; and introducing the plant exhaust into the absorbent solution to carry out reaction between the sulfite radical of the absorbent solution and the nitrogen oxides contained in the exhaust to reduce the nitrogen oxides to nitrogen gas.
摘要:
Powder and/or fine particles containing mainly oxides of iron or ferroalloys, which are used or generated in ironworks, steelworks, etc. are sieved to a grain size range between about 32 mesh and about 10mm and used as reduction catalyzer. A reactor is filled with said reduction catalyzer. Exhaust gas containing nitrogen oxides and with added ammonia is passed in contact with said reduction catalyzer through said reactor, while heating said reduction catalyzer to a temperature between about 300.degree. C and about 370.degree. C, whereby nitrogen oxides are removed from said exhaust gas by reduction. Said reduction catalyzer can be used as material for ironmaking, without requiring any further treatment, after use as catalyzer.
摘要:
A polisher for polishing a curved surface such as a concave surface of a spectacle lens has a structure in which a polishing pad 3 comprising water passing grooves 5 having a width W of 0.1 to 5 mm is adhered to a dome-shaped elastic base member 2. The polishing pad 3 is composed of a plurality of pads 31, and the water passing grooves 5 are formed at the gaps between the pads 31, whereby the width W of the water passing grooves 5 are made small. It is effective to make the pads 31 polygonal in shape. The polishing pad 3 covers the moving region 6 of the work 8 to be polished. The polishing pad 3 is adhered through a high-tack adhesive layer 4. A polishing method is adopted in which such a polisher 1 is used and the work 8 is polished by pressing the polishing pad 3 against the work 8, whereby the polishing pad 3 adhered to the elastic base member 2 can be prevented from being stripped by an end edge of the work 8, and generation of defective polish can be prevented.
摘要:
An aspherical surface processing method involves a workpiece to be processed by rotating around a rotation axis, and a rotational tool movable relative to the workpiece in the same direction as the rotation axis of the workpiece and in a direction perpendicular to the rotation axis of the workpiece. The rotational tool is shifted in a fixed direction with a predetermined feed pitch in a partial or entire region from a center of the rotation axis of the workpiece to a periphery of the workpiece in the direction perpendicular to the rotation axis of the workpiece to process the workpiece into a non-axisymmetrical and aspherical surface.
摘要:
Production information such as an edging mark 31 indicating a region of a lens remaining after edging and reference position marks 32 are depicted in a region, to be cut off by the edging, of a surface of a lens 10 for spectacles. Any production information does not remain on the finished lens 10 after the edging. A lens processing system 100 includes a reference position detecting apparatus (120 and 130) for detecting a reference position of a spectacle lens, and a marking apparatus (170, 160, 150 and 110) for depicting production information of the lens on a specific surface of the spectacle lens on the basis of the reference position information obtained by the reference position detecting apparatus (120 and 130).
摘要:
An aspheric-surface processing method according to the present invention, uses a cuffing apparatus including at least one turning tool movable in the same direction as the rotating axis of the work and is also movable in a direction perpendicular to the rotating axis of the work. This method includes moving the turning tool at a predetermined feed pitch in a fixed direction over at least a part of the work region extending from the center of the rotating axis of the work to a peripheral portion of the work and also moving the turning tool in another direction perpendicular to the rotating axis of the work in order to process the work for forming an axis-asymmetric aspheric surface.
摘要:
An aspheric-surface processing method according to the present invention, uses a cutting apparatus including at least one turning tool movable in the same direction as the rotating axis of the work and is also movable in a direction perpendicular to the rotating axis of the work. This method includes moving the turning tool at a predetermined feed pitch in a fixed direction over at least a part of the work region extending from the center of the rotating axis of the work to a peripheral portion of the work and also moving the turning tool in another direction perpendicular to the rotating axis of the work in order to process the work for forming an axis-asymmetric aspheric surface.
摘要:
A lens surface shape is created by a near-finish surface forming rough-cutting step of creating a near-finish surface shape analogous to a lens surface shape based on a prescription of a spectacle lens from a spectacle lens base material 11 by numerically controlled cutting, and a finish-cutting step of creating the lens surface shape based on the prescription of the spectacle lens from the near-finish surface shape by numerically controlled cutting. According to this method of producing a spectacle lens, all kinds of spectacle lenses including an inner surface progressive power lens can be produced with high productivity.A complex curved surface can be mirror-polished by a polishing tool, which includes an elastic sheet 41 having a curved surface, wherein a workpiece is polished by applying a pressure to the inner surface side of the elastic sheet 41, to stretch the elastic sheet 41 and bring the outer surface side of the elastic sheet 41 into contact with the workpiece.
摘要:
A semiconductor integrated circuit device includes a terminal and a first capacitance adjusting section. The first capacitance adjusting section is connected to a wiring between the terminal and a protection resistor in front stage of an internal circuit. The first capacitance adjusting section adjusts terminal capacitance of the terminal, based on capacitance of the first capacitance adjusting section. The semiconductor integrated circuit device may further includes a protection circuit which is connected to the wiring between the terminal and the first capacitance adjusting section and protects the internal circuit.
摘要:
A polishing method particularly suitable for mirror-polishing the concave surface of a lens and a polishing device, the method characterized by including the step of polishing work surfaces (50a, 50b) while allowing parts of the dome-shaped parts of elastic polishing objects (10a, 10b) matching the curved shapes of the concaved work surfaces of the works (50a, 50b) selected from among the plurality of the elastic polishing bodies having the dome-shaped parts (11a, 11b) different in curvature and larger in area than the concaved work surfaces of the works (50a, 50b) to come into contact with the generally entire surfaces of the work surfaces, wherein the curvature centers (40) of the dome-shaped parts are generally aligned with the swing centers (41) of the works, whereby the concaved work surfaces can be rapidly and uniformly polished.