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1. 发明专利

JPH11199334A REFRACTORY FOR ALUMINUM ALLOY MELTING FURNACE AND PRECAST BLOCK 失效
公开(公告)号：JPH11199334A
公开(公告)日：1999-07-27
申请号：JP36842797
申请日：1997-12-26
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO , JAPAN AJAX MAGNETHERMIC CO LTD
发明人： MIWA TORU , MORI HAJIME , ARAYA HIROYUKI , NARA TADASHI , FURUKAWA TOMOYOSHI , NAKANOSONO MAKOTO , HAMAZAKI YOSHIHISA , SUDO SHINTARO , KATO YOICHI , TABUCHI YUKIHARU , KURITA KAZUHIKO , YAMADA HIROSHI
IPC分类号： C04B35/66 , C23C2/00 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To obtain a refractory for aluminum alloy metal-melting furnace that shows excellent spalling resistance, osmotolerance and corrosion resistance with excellent workability, even when the refractory is applied to a furnace for melting an Al-Zn alloy of large penetrability by adding a prescribed amount of specific additives to a high alumina and low-cement castable cement. SOLUTION: This refractory brick contains 100 pts.wt. of high alumina, low cement castable refractory and 0.5-3 pts.wt. of one or more kinds of additives in the total, selected from slightly soluble phosphate salts, frits and boron carbide. Aluminum phosphate or the like may be used as a slightly soluble phosphonium salt and less soluble and glassy phosphate can be used suitably. The frits can be selected from sodium borosilicate, lead borosilicate, aluminum borosilicate and preferably starts softening at 350-700 deg.C. As the boron carbide, may be used a commercially available one, for example, comprising >=70 wt.% of boron and about 20-25 wt.% of C.

2. 发明专利

JPH1172317A SPANGLE SIZE-MEASURING DEVICE 失效
公开(公告)号：JPH1172317A
公开(公告)日：1999-03-16
申请号：JP23192697
申请日：1997-08-28
申请人： NIPPON KOKAN KK
发明人： KAZAMA AKIRA , OI TOSHIHIKO , TAKASE AKIRA , MANABE TOSHIKI , NARA TADASHI
IPC分类号： G01B11/02 , G01B11/30 , G01N21/89 , G01N21/892 , G06T1/00 , G06T7/00 , G06T7/60
摘要： PROBLEM TO BE SOLVED: To obtain a device for controlling shipment management and manufacture of a product with a spangle that has a size required by a customer by applying light from a light source to a steel with a directivity, picking up the image of the light and shade pattern of the spangle appearing at the part where light is applied, and processing the picked-up image with an operation means for obtaining the size of a light or a shade part. SOLUTION: Light is applied to a steel plate 1 at a narrow angle of approximately five degrees by using a light source 2 that is formed in a sheet shape and has strong directivity, and the image of the steel plate 1 is picked up from an angle that is vertical to the steel plate 1 or is inclined to a light source incidence side by a camera 3, thus capturing light and shade images due to the light reflection anisotropy of a spangle and measuring size due to image processing by a personal computer 6. The image is taken into a memory as a digital signal with 8 bits and 256 gradations using the personal computer 6 and shading compensation for eliminating brightness nonuniformity is performed to normalize an average brightness to the level of 127 brightness. Binarization is performed with an appropriate threshold for extracting the spangle, and a diameter is obtained according to the area of each particle.

3. 发明专利

JPH07166382A GELATINIZATION INHIBITOR AND METHOD FOR CLEANING METAL WITH THE SAME 失效
公开(公告)号：JPH07166382A
公开(公告)日：1995-06-27
申请号：JP31353493
申请日：1993-12-14
申请人： KAO CORP , NIPPON KOKAN KK
发明人： MATSUDA HIROYUKI , HAMAI TOSHIMASA , MITSUHASHI HIROYUKI , FURUICHI SHIGEKI , NARA TADASHI
IPC分类号： B01D19/04 , C09K3/00 , C11D7/26 , C23G1/19
摘要： PURPOSE:To inhibit the gelation of a cleaning soln. contg. a detergent for metal and prevent the foaming of the soln. and stably operate a cleaning apparatus over a long time by incorporating specified higher alcohol into the detergent. CONSTITUTION:When a metal is cleaned by immersion in a metal cleaning soln., a gelation inhibitor is added to the cleaning soln. This inhibitor contains higher alcohol represented by ROH (where R is >=14C satd. or unsatd. hydrocarbon). The foaming and gelation of the cleaning soln. are remarkably inhibited and an apparatus is operated over a long time without lowering the cleaning ability.

4. 发明专利

JPH05125512A POT STRUCTURE FOR HOT DIP METAL COATING 失效
公开(公告)号：JPH05125512A
公开(公告)日：1993-05-21
申请号：JP31002591
申请日：1991-10-30
申请人： NIPPON KOKAN KK
发明人： NARA TADASHI
IPC分类号： C23C2/00
摘要： PURPOSE:To restrain heat loss with the atmospheric air and to minimize loss of plating bath caused by the oxidation of hot dip metal by arranging an upper cover directly contacting with a pot for hot dipped metal coating and the plating bath surface in a preliminary pot. CONSTITUTION:A steel strip 3 is introduced into the galvanizing bath 20 in the pot 2a through a snout 4 and taken out on the galvanizing bath surface by changing the direction with a sink roll 5 to adjust galvanizing stuck quantity with squeezing nozzles 6a, 6b. In the hot dip galvanizing, the ceramics-made upper cover 1a is dipped and arranged on the molten zinc surface in the pot 2a. This upper cover 1a is desirable to arranged to a supplying hole after supplying metal 7. As the above ceramics, SiC, Al2O3, etc., having difficult-to-erode to the molten zinc and excellent heat insulation is desirable. By this method, thermal diffusion caused by convection of the atmospheric air is prevented, and also the oxidation caused by contact with the atmospheric air is prevented and the production efficiency in the plating line can be improved.

5. 发明专利

JP2973072B2 失效
公开(公告)号：JP2973072B2
公开(公告)日：1999-11-08
申请号：JP31353693
申请日：1993-12-14
申请人： KAO KK , NIPPON KOKAN KK
发明人： MATSUDA HIROYUKI , HAMAI TOSHIMASA , MITSUHASHI HIROYUKI , FURUICHI SHIGEKI , NARA TADASHI
IPC分类号： C11D7/26 , C08L71/00 , C08L71/02 , C23G5/032 , C25F1/00

6. 发明专利

JP2939694B2 失效
公开(公告)号：JP2939694B2
公开(公告)日：1999-08-25
申请号：JP31353493
申请日：1993-12-14
申请人： KAO KK , NIPPON KOKAN KK
发明人： MATSUDA HIROYUKI , HAMAI TOSHIMASA , MITSUHASHI HIROYUKI , FURUICHI SHIGEKI , NARA TADASHI
IPC分类号： B01D19/04 , C09K3/00 , C11D7/26 , C23G1/19

7. 发明专利

JP2516430B2 失效
公开(公告)号：JP2516430B2
公开(公告)日：1996-07-24
申请号：JP16533989
申请日：1989-06-29
申请人： NIPPON KOKAN KK
发明人： NOGUCHI TAKAO , KUSAKA TAKEO , OGAWA MASAHIRO , MISHIMA ICHIRO , NARA TADASHI
IPC分类号： C23C2/00

8. 发明专利

JPH07166153A GELLING-SUPPRESSIVE AGENT AND METHOD FOR WASHING METAL USING THE SAME 失效
公开(公告)号：JPH07166153A
公开(公告)日：1995-06-27
申请号：JP31353593
申请日：1993-12-14
申请人： KAO CORP , NIPPON KOKAN KK
发明人： MATSUDA HIROYUKI , HAMAI TOSHIMASA , MITSUHASHI HIROYUKI , FURUICHI SHIGEKI , NARA TADASHI
IPC分类号： B08B7/00 , C09K3/00 , C11D1/72 , C23G5/032 , C25F1/00
摘要： PURPOSE:To obtain an agent for metal washing liquors capable of suppressing the gelation of such washing liquors and of operating the relevant washing unit stably for a long time without declining in the detergency, containing a specific polyoxyethylene added-type ether-based surfactant. CONSTITUTION:This gelling-suppressive agent contains a polyoxyethylene-added type ether-based surfactant with a HLB of >=15, e.g. of the formula (R is a 6-12C alkylphenyl or a 8-16C alkyl; (n) is such a number that the HLB stands at >=15) such as lauryl alcohol-ethylene oxide (19mol-added) (HLB: 16.3). It is preferable that this agent be added to a washing liquor and a metal immersed therein and washed.

9. 发明专利

JPH04160141A DEVICE FOR RECOVERING DROSS IN POT FOR HOT DIP GALVANIZING 失效
公开(公告)号：JPH04160141A
公开(公告)日：1992-06-03
申请号：JP28627990
申请日：1990-10-24
申请人： NIPPON KOKAN KK
发明人： NOGUCHI TAKAO , NAKAGAWA NOBUO , NARA TADASHI
IPC分类号： B01D39/20 , C23C2/00
摘要： PURPOSE:To stably and efficiently filtrate and recover dross by floating a dross filtrating vessel composed of lining a gauze in a deramic filter-made vessel on a zinc bath surface and pumping up the dross together with molten zinc into the vessel. CONSTITUTION:The dross filtrating vessel 1 is constituted by lining the gauzes 4, 5 having larger mesh than the filter in the ceramic filter-made vessel 3. The filtrating vessel 1 is floated on the zinc bath 8 surface in the molten zinc plating pot. At this time, the inner bottom surface 9 in the above filtrating vessel 1 is positioned to the zinc bath 8 surface level or lower with this dead wt. Into this filtrating vessel 1, the dross is sucked up and supplied together with the molten zinc from the zinc bath 8 with dross pumping-up means 2 providing a pump 7 and a sucking up pipe 6. By this method, the filtrating vessel 1 is stabilized on bath surface and lowering of the temp. is prevented to prevent solidification of the dross and the dross is stably and efficiently filtrated and recovered without clogging up the filter 3.

10. 发明专利

JPH046257A DIFFERENT THICKNESS PLATING METHOD OF MOLTEN METAL 失效
公开(公告)号：JPH046257A
公开(公告)日：1992-01-10
申请号：JP10808590
申请日：1990-04-24
申请人： NIPPON KOKAN KK
发明人： NARA TADASHI , TAKEUCHI TSUTOMU , NOGUCHI TAKAO , FUKUSHIMA YUICHI , OGAWA MASAHIRO , MISHIMA ICHIRO
IPC分类号： C23C2/20
摘要： PURPOSE:To control the difference in the plating deposition between the front and rear surfaces of a metallic strip by adjusting the positions of stabilizing rolls installed in a plating bath under the bath surface at the time of subjecting the metallic strip to continuous hot dip metal coating. CONSTITUTION:The metallic strip 1 is admitted via a snout 7 into the plating bath 2 and the progressing direction thereof is changed by a sink roll 6 and is directed upward through the spacing between the stabilizing rolls 3a and 3b. The surface of the metallic strip 1 has a lifted plating metal 4 at this time. The amt. of this lifted plating metal 4 varies with the position of the stabilizing rolls 3a, 3b under the bath surface. The amt. of the lifted plating metal 4 is larger as the position thereof under the bath surface is deeper is the traveling speed of the metallic strip 1 is constant. The front and rear surfaces of the metallic strip 1 are easily subjected to the different thickness plating in this way if the position under the bath surface of the stabilizing rolls 3a, 3b is adjusted in this way.

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