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1. 发明专利

JPH03255884A CONTINUOUS CALCINATION FURNACE 失效
公开(公告)号：JPH03255884A
公开(公告)日：1991-11-14
申请号：JP5237690
申请日：1990-03-02
申请人： INAX CORP , NIPPON STEEL CORP
发明人： MORIOKA TOSHIMICHI , HIRANO YASUHISA , IWAHASHI AKIRA , MATSUO MASATAKA , KURAYOSHI KAZUMI , ISHII AKIO
IPC分类号： F27B9/04 , F27B9/24 , F27B9/36 , F27D7/06
摘要： PURPOSE:To obtain a stable reduced color of a calcined article by disposing a reducing band where a reducing flame from a burner is prevented from passing through gaps among rollers by a shielding plate located in close vicinity to the rollers opposing to a burner. CONSTITUTION:In a continuous calcination furnace 10, an article 14 to be calcined is calcined upon passing through a calcination band whilst it is carried by a roller 12 from an inlet of a furnace to an outlet of the same, and the article 14 is reduced by a burner 16 in a reducing band located therebehind, and thereafter the article 14 is carried after passing through a heat holding band 21 and cooled into a product. In the reading band, a refractory material- made shielding member 18 is formed over a predetermined range just under and the reducing burner 16 so as to bury a space below the roller 12. Hereby, a reducing flame from the burner 16 is prevented from passing downwardly through spaces among the rollers 12. Accordingly, the flame is prevented from being distributed and a flame state prevented from being disturbed and a flame state prevented from being changed each time the article 14 passes through just under the burner 16. Thus, reducing conditions are kept uniform and stable reduced color is yielded.

2. 发明专利

JPH03257086A SURFACE TREATMENT OF FIRED BODY 失效
公开(公告)号：JPH03257086A
公开(公告)日：1991-11-15
申请号：JP5237890
申请日：1990-03-02
申请人： INAX CORP , NIPPON STEEL CORP
发明人： ISHIDA HIDEKI , MORIOKA TOSHIMICHI , HIRANO YASUHISA , IWAHASHI AKIRA , MATSUO MASATAKA , KURAYOSHI KAZUMI , ISHII AKIO
IPC分类号： C04B41/80 , C04B41/86
摘要： PURPOSE:To stably reduction-color the surface of a fired body by blowing a reducing gas contg. gaseous CO as the essential component against the surface of the fired body contg. the metal oxides of Cu, Fe and Ti and which is still hot after firing. CONSTITUTION:A reducing gas consisting of gaseous CO alone or a reducing gas consisting of an inert gas (e.g. N2) contg. >=3% of gaseous CO or a gaseous mixture of CO and H2 is prepared. The reducing gas is blown against the surface of a fired body contg. 0.2-10% of the metal oxides of Cu, Fe and Ti and which is still hot after firing to reform the surface. Consequently, the fired body surface is beautifully reduction-colored in part or in whole. In this case, the reducing gas is preheated to >=500 deg.C and then blown against the fired body surface to cause an excellent reduction reaction, and a stabilized reduction color is obtained.

3. 发明专利

JPH03257085A REDUCTION TREATMENT OF FIRED BODY 失效
公开(公告)号：JPH03257085A
公开(公告)日：1991-11-15
申请号：JP5237590
申请日：1990-03-02
申请人： INAX CORP , NIPPON STEEL CORP
发明人： MORIOKA TOSHIMICHI , HIRANO YASUHISA , IWAHASHI AKIRA , MATSUO MASATAKA , KURAYOSHI KAZUMI , ISHII AKIO
IPC分类号： C04B41/80
摘要： PURPOSE:To stably obtain products having a uniform color developed by reduction by carrying out reduction treatment while preventing the penetration of external atmospheric gas into a reduction treatment part. CONSTITUTION:Bodies 14 to be fired on many rolls 12 arranged parallel to each other are introduced into a continuous firing furnace and fired. The fired bodies 14 are introduced into the rear part of the firing zone and the surface of each of the fired bodies 14 is subjected to reduction treatment by blowing reducing flames from many nozzles of a reducing burner 16. At this time, inert gas fed from a duct 18 is blown into the furnace from plural openings 20 pierced before and behind the burner 16 so as to prevent the penetration of external atmospheric gas into the reduction treatment part.

4. 发明专利

JPH03257084A REDUCTION TREATMENT OF FIRED BODY 失效
公开(公告)号：JPH03257084A
公开(公告)日：1991-11-15
申请号：JP5237490
申请日：1990-03-02
申请人： INAX CORP , NIPPON STEEL CORP
发明人： MORIOKA TOSHIMICHI , HIRANO YASUHISA , IWAHASHI AKIRA , MATSUO MASATAKA , KURAYOSHI KAZUMI , ISHII AKIO
IPC分类号： C04B41/80
摘要： PURPOSE:To prevent the deformation and cracking of a fired body during reduction treatment and to develop a desired uniform color by reduction by blowing reducing flames on the surface of the fired body at a specified interval. CONSTITUTION:A burner 12 having many nozzles is set in front of the surface of a fired body 10 at 15-80mm interval and reducing flames 14 from the burner 12 are directly blown on the surface of the fired body 10 immediately after firing to carry out reduction treatment.

5. 发明专利

JPH03255807A BURNER FOR SURFACE REDUCTION OF BURNED ITEM 失效
公开(公告)号：JPH03255807A
公开(公告)日：1991-11-14
申请号：JP5237390
申请日：1990-03-02
申请人： INAX CORP , NIPPON STEEL CORP
发明人： MORIOKA TOSHIMICHI , HIRANO YASUHISA , IWAHASHI AKIRA , MATSUO MASATAKA , KURAYOSHI KAZUMI , ISHII AKIO
IPC分类号： F23D14/56 , F27B9/24 , F27B9/30 , F27B9/36 , F27D7/04 , F27D99/00
摘要： PURPOSE:To uniformize the composition and concentration of reducing gas over the area from outer periphery to central region by disposing a large number of blowoff holes with specific diameter of a burner in such a manner that the interval between the adjacent blowoff holes is made smaller than specific number of times the diameter of the hole. CONSTITUTION:There are provided a burner head 12 and a premixing section 14, where fuel gas and air respectively fed from feed ports 16, 18 is premixed and then sent therefrom to the burner head 12. The mixed gas is blown off and excessive fuel gas is decomposed by flames to produce reducing gas. A large number of blowoff holes 26 have a diameter (d) of 1-5mm and the interval (l) between the adjacent holes 26, 26 is less than three times the diameter of the hole. And the mixed gas blown off from the holes 26 is decomposed in flames containing reducing gas, so that reducing gas is produced. Reduction is performed by blowing said reducing gas, wherein the reduction is carried out in a zone isolated from the outside atmosphere, so that the reduction is performed uniformly.

6. 发明专利

JPH03257087A PRODUCTION OF ORNAMENTAL FIRED ARTICLE 失效
公开(公告)号：JPH03257087A
公开(公告)日：1991-11-15
申请号：JP5237790
申请日：1990-03-02
申请人： INAX CORP , NIPPON STEEL CORP
发明人： MORIOKA TOSHIMICHI , HIRANO YASUHISA , IWAHASHI AKIRA , MATSUO MASATAKA , KURAYOSHI KAZUMI , ISHII AKIO
IPC分类号： C04B41/86 , C04B41/80 , C04B41/89
摘要： PURPOSE:To obtain the ornamental fired article having a beautiful ornamental layer due to reduction coloration and excellent in chemical resistance by providing an uncolored layer contg. a reduction-coloring component on the surface of a base, applying a light-transmissive chemical-resistant protective film-forming material, firing the material and then blowing a reducing gas against the fired material. CONSTITUTION:A glaze (e.g. a preparation of feldspar, quartz sand, zinc white, copper oxide, etc.) having a reduction-coloring component is applied on the surface of a tile base 12 to form an uncolored ornamental layer 10. A light- transmissive chemical-resistant protective film forming material 14 (e.g. a mixture of transparent frit and Gaerome clay) is then applied on the surface of the ornamental layer 10. The material is colored, a reducing gas generated by a reduction burner 16 is blown against the colored article which is still hot to reduction-color the coloring component of the ornamental layer 10, and an ornamental colored article is obtained. Since the obtained article has the chemical-resistant protective film 14, the article is not discolored or faded even when washed with a detergent.

7. 发明专利

JPH0768356A STRUCTURE OF FLAT OUTER NOZZLE FOR TWIN ROLL TYPE CONTINUOUS CASTING 失效
公开(公告)号：JPH0768356A
公开(公告)日：1995-03-14
申请号：JP21724993
申请日：1993-09-01
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TSUKIJI HIDEO , INOUE YUKIO , TSUTSUI KOJI , ISHII AKIO , YAMAGAMI YASUHIRO , YAMADA MAMORU
IPC分类号： B22D11/06 , B22D41/50
摘要： PURPOSE:To provide the structure of a flat outer nozzle for twin roll type continuous casting, in which the reinforcing efficiency is improved by reinforced pins and adhesive and the firm assembly can efficiently be realized, in the case of manufacturing the flat outer nozzle body for twin roll type continuous casting by dividing into an upper part and a lower part and integrally assembling the nozzle body by using the reinforced pins and the adhesive. CONSTITUTION:In the case of integrating by forming the outer nozzle body 1 with the upper body 2 and the lower body 3 and using the reinforced pins 7 composed of the ceramic material together with the adhesive, the reinforced pins 7 whose outer diameter is in the range of 10-25mm, are inserted and arranged so that the reinforced strength distribution in the horizontal direction by the reinforced pins 7 becomes the ratio of the both end parts of 1 to the center part of 2-3 according to the stress distribution generated in the outer nozzle.

8. 发明专利

JPH0664962A REFRACTORY LINING FOR FURNACE 失效
公开(公告)号：JPH0664962A
公开(公告)日：1994-03-08
申请号：JP24402692
申请日：1992-08-21
申请人： NIPPON STEEL CORP
发明人： GOTO KIYOSHI , ISHII AKIO , SAKAMOTO HIROSHI , SAITO MASAO , KASAHARA HAJIME
IPC分类号： C04B35/00 , C21C5/44 , F27D1/00
摘要： PURPOSE:To obtain high durability of refractory lining for furnace by blending given amounts of one or more alumina, etc., and a graphite raw material with a refractory containing SiC, etc. CONSTITUTION:20-95wt.% one or more of high-purity alumina and spinel are blended with 5-40wt.% graphite raw material such as scaly graphite or mesophase carbon to give a raw material mixture. Then the mixture is optionally mixed with another refractory containing SiC and magnesia (e.g. B4C, Si3N4), kneaded, molded and dried to give a refractory. Then the refractory is used for furnace lining for smelting scrap, etc.

9. 发明专利

JPH05132353A BASIC REFRACTORY 失效
公开(公告)号：JPH05132353A
公开(公告)日：1993-05-28
申请号：JP29287691
申请日：1991-11-08
申请人： NIPPON STEEL CORP , KUROSAKI REFRACTORIES CO
发明人： GOTO KIYOSHI , ISHII AKIO , KAJI NOBUHIKO , TAMAKI TAKEYUKI
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To obtain highly corrosion- and thermal shock-resistant highly durable brick by blending zircon with zirconia, magnesia and refractory grains. CONSTITUTION:A basic refractory is obtained by blending 1-20wt.% zircon having about >=80% ZrO2.SiO2 component with 2-20wt.% zirconia of about >=90% purity and the remainder of magnesia of >=95% purity and refractory grains (e.g. spinel), adding a binder, kneading the mixture, forming the kneaded mixture, drying the formed compact and burning the dried compact at >=1600 deg.C maximum temperature.

10. 发明专利

JPH04143049A NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH04143049A
公开(公告)日：1992-05-18
申请号：JP26724690
申请日：1990-10-03
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： IIZUKA YOSHIHARU , MINAMI MASAMITSU , KASAI KIYOTO , ISHII AKIO , ASANO KEISUKE
IPC分类号： B22D11/10 , B22D41/54 , C04B35/48
摘要： PURPOSE:To prevent sticking of alumina and to enable stable casting for a long time by suing a nozzle for continuous casting containing the limited wt.% of the specific calcium zirconate series clinker, NB, graphite and refractory raw material. CONSTITUTION:By using the immersion nozzle for continuous casting or the nozzle for tundish containing 15-30wt.% CaO, 70-85wt.% ZrO2 and composed of 10-90wt.% calcium zirconate series clinker containing CaZrO3 as the essential component as mineral composition, 5-30wt.% BN, 5-40wt.% graphite and

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