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1. 发明专利

JPH05345681A 失效
公开(公告)号：JPH05345681A
公开(公告)日：1993-12-27
申请号：JP15545692
申请日：1992-06-15
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TSUDA HIDEYUKI , MATSUO MASATAKA , HARADA SHIGEMI , ASO SEIJI , SUKENARI SHIRO , MIKAMI YORIYOSHI
IPC分类号： C04B35/657 , C04B35/66 , C04B35/62
摘要： PURPOSE:To provide a flame spraying material capable of sufficiently exhibiting effect in combination of MgO and CaO. CONSTITUTION:The magnesium lime based flame spraying material is constituted so as to contain 10-80wt.% synthetic dolomite clinker having weight, for 2hr) and containing >40wt.% CaO and 90-20wt.% magnesia clinker as main materials. Thereby, the flame spraying material remarkably improved in corrosion resistance, stickiness and adhesion can be obtained without especially changing flame spraying conditions.

2. 发明专利

JPH0417965A NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH0417965A
公开(公告)日：1992-01-22
申请号：JP12262690
申请日：1990-05-11
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： FUKUOKA HIROMI , HATTA TOKUAKI , SOEJIMA MASAKAZU , HANAGIRI SEIJI , HARADA SHIGEMI , SUKENARI SHIRO
IPC分类号： B22D11/06 , B22D11/10 , B22D41/50
摘要： PURPOSE:To prevent the development of warp and crack in a nozzle by joining plural piece plates divided to longitudinal direction while inserting glassy sealing material on joining face in the nozzle body having slender opening cross section. CONSTITUTION:The nozzle body 2 is divided to the longitudinal direction into the divided piece plates 4, 5 and thick parts 7 are formed as connecting with the recessed part 6. One face of the thick part 7 arranges the joining face 8 forming flat surface mutually slidable and cutout part 9 at edge part thereof, and after joining, the glassy material is packed in a V groove 10 at the edge part as the sealing material. Bolts 12 and nuts 13 are fitted in through holes 11 and assembled. Even if the difference is developed in heating condition to both divided piece plates 4, 5, heat stress is not developed as the whole nozzle and the crack and warp are not developed.

3. 发明专利

JPH0225687A REPAIRING METHOD AND REPAIRING DEVICE FOR VESSEL APPLIED WITH LINING FOR MOLTEN METAL 失效
公开(公告)号：JPH0225687A
公开(公告)日：1990-01-29
申请号：JP17253588
申请日：1988-07-13
申请人： NIPPON STEEL CORP , KUROSAKI REFRACTORIES CO
发明人： ASANO KEISUKE , HAMAI KAZUO , KASAI KIYOTO , HARADA SHIGEMI , FUJITA MASAYUKI , OZAWA HITOSHI , HAYASHI HIROAKI , ASO SEIJI
IPC分类号： F27D1/16
摘要： PURPOSE:To unify the thickness of a furnace wall after repairing and permit the economical use of repairing materials by a method wherein the remaining thickness of a lining refractory is calculated to obtain the distribution of the remaining thickness automatically and automatic repairing is effected until a set remaining thickness is obtained. CONSTITUTION:When a vessel for molten metal is set below a trestle, an arm 4, connecting a sensor box 3 at the tip end thereof, is descended to measure the thickness of bricks while moving on a furnace wall. In this case, a distance between a sensor head 2 and an iron skin 21 is measured by a sensor 2 and a distance from the sensor head to the brick 20 is measured by the measuring rod 1 of a distance meter connecting an operating transformer therein while measured data are sent into a numerical analyzer 28 (computer). The numerical analyzer 28 operates the thickness of the bricks by both data and obtains the distribution of the thickness of the bricks on the wall surface of the vessel. At the same time, the analyzer 28 effects the feedback of the data, which are short to the set thickness of the bricks, to a control board 27 to move a spray nozzle 4 to a place, whereat the short thickness is measured, and repair the place through spraying.

4. 发明专利

JPH062101A ALUMINA-ZIRCON THERMAL SPRAYING MATERIAL CONTAINING METAL POWDER 失效
公开(公告)号：JPH062101A
公开(公告)日：1994-01-11
申请号：JP15546092
申请日：1992-06-15
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TSUDA HIDEYUKI , MATSUO MASATAKA , HARADA SHIGEMI , SUKENARI SHIRO , ASO SEIJI
IPC分类号： C23C4/04
摘要： PURPOSE:To provide an alumina-zircon thermal spraying material having sufficient adhesion, spalling resistance, and corrosion resistance and also having sufficient durability even if used for lining for various industrial kilns and furnaces. CONSTITUTION:This material has a composition consisting of, by weight, 30-90% zircon, 0.5-10% of one or more kinds selected from metallic chromium and alloys containing chromium components, and the balance essentially alumina. By using this thermal spraying material, a thermally sprayed body remarkably improved in coating weight rate adhesion, corrosion resistance, and thermal shock resistance can be formed without particularly changing thermal spraying conditions.

5. 发明专利

JPH05345682A 失效
公开(公告)号：JPH05345682A
公开(公告)日：1993-12-27
申请号：JP15545792
申请日：1992-06-15
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TSUDA HIDEYUKI , MATSUO MASATAKA , HARADA SHIGEMI , SUKENARI SHIRO , ASO SEIJI
IPC分类号： C04B35/657 , C04B35/66 , C04B35/62
摘要： PURPOSE:To provide chromium based flame spraying material excellent in corrosion resistance and hot strength which a chromium based refractory has and capable of exhibiting characteristics of chromium itself. CONSTITUTION:The chromium based flame spraying material contains 45-70wt.% chromium based material and 25-55wt.% alumina. Thereby, properties of Cr2O3 itself hardly being wetted by molten steel and slag are exhibited to improve corrosion resistance and complete solid solution with Al2O3 is carried out to raise melting of Al2O3 and improve also hot strength and corrosion resistance.

6. 发明专利

JPH02141445A MONOLITHIC REFRACTORY OF REFRACTORY STRUCTURE FOR PRETREATING MOLTEN PIG IRON 失效
公开(公告)号：JPH02141445A
公开(公告)日：1990-05-30
申请号：JP29323888
申请日：1988-11-19
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： HARADA SHIGEMI , MIYAGAWA YOSHIKAZU , KUDO KOICHI , YOSHIMURA TADASHI , KAWASAKI KAZUHIKO
IPC分类号： C04B14/30 , C04B14/32 , C04B14/36 , C04B35/66 , F27D1/00
摘要： PURPOSE:To improve corrosion and thermal shock resistances and to enhance ability to suppress internal stress due to the thermal expansion of a core metal and ability to absorb stress by blending aluminous raw material or raw material for mullite with SiC, a carbonaceous material, pagodite and/or quartzite and a binder. CONSTITUTION:Aluminous raw material or raw material for mullite is blended with 5-40wt.% SiC, 1-5wt.% carbonaceous material such as tar, 3-20wt.% pagodite and/or quartzite and 5-20wt.% binder such as alumina cement.

7. 发明专利

JPH05240586A 失效
公开(公告)号：JPH05240586A
公开(公告)日：1993-09-17
申请号：JP7576892
申请日：1992-02-28
申请人： NIPPON STEEL CORP
发明人： ASO SEIJI , HARADA SHIGEMI , UMEMOTO KOUTAROU
IPC分类号： F27D1/16
摘要： PURPOSE:To adequately perform the repair work corresponding to the damage state of a part to be repaired and the allowable repairing period of time by a method wherein the water addition amount is determined according to the measured surface temperatures of a refractory lining at the beginning of repair work and thereafter corresponding to the surface temperatures of spraying refractory material sprayed on the part to be repaired. CONSTITUTION:Changes in the renewing surface temperatures of a spraying refractory material 10 sprayed on to a part 9 to be repaired on a refractory layer 8 are actually measured from time to time by an infrared ray radiation thermometer 11. An arithmetic controller 12 controls a water feed controller 13 as a feed controller and a spraying refractory material feed controller 14 so that the ratio of water addition amount to the spraying refractory material 10 is changed corresponding to the measured temperatures. Thus, the water addition amount is determined corresponding to time actual surface temperatures of the spraying refractory material 10 sprayed on the part to be repaired, resulting in an excellent deposition ratio. In addition, adequate repair work can be performed corresponding to the damage state of time part to be repaired and the allowable repair period of time.

8. 发明专利

JPH03295847A CARBON-CONTAINING REFRACTORY 失效
公开(公告)号：JPH03295847A
公开(公告)日：1991-12-26
申请号：JP9399390
申请日：1990-04-11
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： HANAGIRI SEIJI , HARADA SHIGEMI , MIYAGAWA YOSHIKAZU , TANAKA MASAHITO , HODOI TOSHIYUKI , TSUCHINARI AKIHIRO
IPC分类号： C04B35/00
摘要： PURPOSE:To improve the slag resistance, structural stability and corrosion resistance of a refractory by incorporating specified roseki material, carbonaceous or SiC material, refractory material and a binder. CONSTITUTION:By weight, 100% blend constituted of pyrophillite material contg. >=50% particles with 1 to 5mm particle size, 3 to 40% carbonaceous material (e.g. natural graphite) or SiC material, 7 to 92% refractory material of one or more kinds selected from high alumina material (e.g. synthetic mullite), magnesia material (e.g. sintered magnesia) and zirconia material (e.g. sintered zirconia) is blended with a binder (e.g. sodium silicate) and, if required, with 0.5 to 10% metallic material (e.g. silicone) and/or glass material (e.g. sodium phosphate).

9. 发明专利

JPH01249667A METHOD FOR BONDING AL2O3-BASED CERAMICS BY THERMAL SPRAYING 失效
公开(公告)号：JPH01249667A
公开(公告)日：1989-10-04
申请号：JP7847488
申请日：1988-03-31
申请人： NIPPON STEEL CORP
发明人： KATAOKA KOUICHIROU , ASANO KEISUKE , HAMAI KAZUO , HARADA SHIGEMI
IPC分类号： C04B37/00
摘要： PURPOSE:To improve the strength of a bonded body at a high temp. by applying build up spraying of a specified bonding material on the bonded part, and then heat-treating the bonded part at the time of bonding Al2O3-based ceramics. CONSTITUTION:When the split Al2O3-based ceramics are bonded, build up spraying of an Al2O3-ZrO2-3Al2O3.2SiO2 based bonding material is applied on the bonded part, and then the bonded part is heat-treated at 900-1200 deg.C for >=1hr. In this case, the surface roughness of 20-60mu Rmax is previously imparted to the bonding parts or the bonding base material is preheated at >=800 deg.C, and then the build up spraying is preferably applied to the bonded part. Furthermore, a groove or a groove having a flat face or a curved face is formed at the bonding parts, and then build up spraying is preferably applied on the bonded part.

10. 发明专利

JPH01170562A METHOD FOR HEATING BY ELECTRIFICATION 失效
公开(公告)号：JPH01170562A
公开(公告)日：1989-07-05
申请号：JP32862587
申请日：1987-12-24
申请人： NIPPON STEEL CORP
发明人： HAMAI KAZUO , ASANO KEISUKE , HARADA SHIGEMI
IPC分类号： B22D11/10 , B22D41/60
摘要： PURPOSE:To stabilize electrified heating and to extend the life of the body to be heated by feeding a smaller current than the necessary max. input current at the initial term of the electrified heating and feeding the max. input current after the contact resistance between the electrode and body to be heated being reduced. CONSTITUTION:A graphite electrode 3, etc., are butted via a shrinkable graphite sheet 2 to the dipping nozzle 1 composed of the conductive refractory of as the body to be heated. Heating is executed by feeding a current to the nozzle 1 via an electrode 4, lead wire 5 and the electrode 3 by pressing the graphite sheet 2 to the peripheral face of the nozzle 1 by a pressing device 7 of specified pressure. In this case, the lower current than the necessary max. current is inputted at the heating beginning time when the temp. of the graphite sheet 2 is low and the max. current is input after the reduction of the contact resistance due to the deformation of the sheet 2. The abnormal heating of the contact part is prevented and the electrified heating is thus stabilized. Consequently the service life of the body to be heated is extended.

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