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1. 发明专利

JPH0649526A IMMERSION PIPE FOR TREATING MOLTEN STEEL AND METHOD FOR PREVENTING STICKING TO IMMERSION PIPE 失效
公开(公告)号：JPH0649526A
公开(公告)日：1994-02-22
申请号：JP20578992
申请日：1992-07-31
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： HORI MITSUJI , FUKUNAGA TETSUO , KURATA KOSUKE , MATSUO SABURO
IPC分类号： C21C7/10
摘要： PURPOSE:To omit a slag cutting operation by decreasing the amt. of the slag sticking to the outer peripheral surface in a slag level position at the time of a molten steel treatment. CONSTITUTION:A gas supply pipe and plural gas ejection ports, such as porous plugs 7, communicating with the base part of this pipe are provided on the outer periphery of the position lower than the level of the molten steel in which the immersion pipe is immersed in such a manner that these ejection ports come into direct contact with the molten steel. An inert gas is ejected at 10 to 200Nl/min, more preferably 100Nl/min per point of the gas ejection ports, by which the film of the inert gas is formed at the boundary between the outer peripheral part of the immersion pipe 10 and the molten steel level and the sticking of the slag and the like is prevented. The above method can dispense with slag cutting operation and prevent chemical erosion by the slag of the outer peripheral refractory material of the immersion pipe 10.

2. 发明专利

JPH05155654A MAGNESIA CHROME BRICK 失效
公开(公告)号：JPH05155654A
公开(公告)日：1993-06-22
申请号：JP32450991
申请日：1991-12-09
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TAMAKI TAKEYUKI , FUKUNAGA TETSUO , KURATA KOSUKE , MATSUO SABURO , MATSUI TAIJIRO
IPC分类号： C04B35/047 , C04B35/04
摘要： PURPOSE:To improve spalling resistance or attrition and tear resistance of a magnesia chrome brick provided by using a chrome ore as a natural raw material or an electromelting magnesite chrome clinker using the chrome ore as a starting material. CONSTITUTION:In a magnesia chrome brick containing 50-100wt.% electromelting magnesite chrome clinker and 0-50wt.% in total of a magnesia clinker, a chrome ore and a chrome oxide and calcined at 1800 deg.C, by adjusting Al2O3 component in total chemical components to 5-15wt.%, a dense layer essentially consisting of MgO.Al2O3 is formed near its working face during the production process, and as a result, since slag permeating is inhibited the corrosive and the slag infiltration resistances are remarkably improve.

3. 发明专利

JPH08170882A METHOD FOR MAKING LINING AT SPECIFIED POSITION, USING COLORED BRICK 失效
公开(公告)号：JPH08170882A
公开(公告)日：1996-07-02
申请号：JP31353194
申请日：1994-12-16
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： FUKUNAGA TETSUO , HORI MITSUJI , KONO TAKESHI , KONO KOJI
IPC分类号： F27D1/16
摘要： PURPOSE: To obtain a method for surely making lining at specified positions in a furnace, using at least one kind of bricks, which are made of a specified material, in the case where the lining is made using plural kinds of the bricks which have color tones being hard to discriminate between them. CONSTITUTION: When lining is continuously made using bricks during worker's circumferential movement in a furnace, like the lining of a converter or a metal mixer, specified brick are each formed by applying different pigments, for which color tones, such as yellow, blue, red, white, green, etc., are changed by respective materials, to the whole surfaces thereof or to only the surfaces visible from inside the furnace in the time of its construction, by means of dipping, spraying, brushing, rolling or electrostatic coating. In this way, the respective materials can be visually recognized without difficulty.

4. 发明专利

JPH08169782A FIREBRICK TREATED SO AS TO INHIBIT SLIP AND DUST GENERATION AND ITS PRODUCTION 失效
公开(公告)号：JPH08169782A
公开(公告)日：1996-07-02
申请号：JP31352994
申请日：1994-12-16
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： FUKUNAGA TETSUO , HORI MITSUJI , KONO TAKESHI , KONO KOJI
IPC分类号： C04B41/83 , C04B41/48
摘要： PURPOSE: To obtain a carbon-contg. brick inhibiting slip and dust generation. CONSTITUTION: This firebrick is a carbon-contg. brick coated with a liq. resin contg. a powdered resin in a half-melted state. This firebrick is produces as follows; a powdered resin is mixed with a stabilizer and a plasticizer under stirring, this mixture is heated at 90-150 deg.C to absorb the stabilizer and plasticizer in the powdered resin and to make the resin porous, this porous powdered resin is added to a liq. resin and stirred, and the resultant powdered resin-contg. liq. resin is applied to the surface of a firebrick and hardened by drying at 100-300 deg.C for 1-10hr.

5. 发明专利

JPH1158350A METHOD AND DEVICE FOR FILLING REFRACTORY COMPOUNDING SUBSTANCE IN CIP FORMING 失效
公开(公告)号：JPH1158350A
公开(公告)日：1999-03-02
申请号：JP22685697
申请日：1997-08-22
申请人： KUROSAKI REFRACTORIES CO
发明人： FUKUNAGA TETSUO
IPC分类号： B28B3/00 , B28B3/02 , B28B13/02
摘要： PROBLEM TO BE SOLVED: To prevent a segregation from arising by a method wherein an intermediate liner which is movable in parallel with a bottom part liner is provided in the vertical direction, and the intermediate liner is lowered in steps from the upper location, and a specified divided amount which is charged at each step, is received. SOLUTION: For a mold 1, an intermediate liner 5 is attached to a hanging rod 6 in a manner to be vertically movable along a core bar 4 while keeping a surface which is in parallel with the surface of a lower liner 2. First, the intermediate liner 5 is set at the upper location of a rubber side wall 3, and a compounding substance is charged onto the intermediate liner 5 from the top of the mold 1, and is filled in a space with the mold side wall. 3. Then, for a next filling, the intermediate liner 5 is lowered. The filling amount of the compounding substance for one filling is made an amount to a location which is lower than the upper end surface of the mold 1, and the compounding substance is thoroughly filled so as not to lean to one location. By repeating the operations for lowering the intermediate liner 5 and filling the compounding substance, the intermediate linear 5 is lowered to the lowermost part, and a required blending amount is filled.

6. 发明专利

JPH10265281A MAGNESIA-SPINEL BRICK 失效
公开(公告)号：JPH10265281A
公开(公告)日：1998-10-06
申请号：JP7019597
申请日：1997-03-24
申请人： KUROSAKI REFRACTORIES CO
发明人： TAMAKI TAKEYUKI , FUKUNAGA TETSUO , INOUE KEIJI , HORI MAKOTO
IPC分类号： C04B41/85 , C04B41/50 , C04B41/87
摘要： PROBLEM TO BE SOLVED: To provide a magnesia-spinel brick capable of applying as a refractory for a vacuum degassing furnace, excellent in slaking resistance and hardly causing structural spalling accompanied with slag wetting. SOLUTION: A brick structure is coated with a silica deposited layer by impregnating or coating the magnesia-spinel brick with a colloidal silica solution and then drying to leave, stick and deposit a silica component on the surface and the inside surface of pores of the magnesia-spinel brick. The silica deposited layer plays a role in isolating the brick structure from the contact with the outdoor air and prevents the hydrating reaction of magnesia. Moreover, the silica component deposited on the surface and the pore inside wall of the brick easily reacts with a liquid component entering from outside such as a slag, in the case that the liquid component such as the slag enters into the pores in the course of operating furnace, to increase the viscosity of the liquid component and thus the silica component has an action of preventing the slag or the like from entering further into the inside.

7. 发明专利

JPH04342454A MAGNESIA-CONTAINING UNBURNED REFRACTORY 失效
公开(公告)号：JPH04342454A
公开(公告)日：1992-11-27
申请号：JP11195191
申请日：1991-05-16
申请人： KUROSAKI REFRACTORIES CO
发明人： TAMAKI TAKEYUKI , YAMAMOTO HIROSHI , HORI MITSUJI , FUKUNAGA TETSUO
IPC分类号： C04B35/043 , C04B35/04 , C04B35/66
摘要： PURPOSE:To provide unburned refractory having improved high slag resistance, corrosion resistance, high abrasion resistance and spalling resistance. CONSTITUTION:The unburned refractory in this invention is characterized by its composition composed of the main raw materials containing one or two more kinds of substances selected from magnesia, zircon, zirconia, spinel, alumina, chromite, chromia and calcia and 0.5-7.0wt.% powdery metal iron additive having

8. 发明专利

JPH101714A IMMERSION TUBE FOR TREATING MOLTEN METAL 失效
公开(公告)号：JPH101714A
公开(公告)日：1998-01-06
申请号：JP14750096
申请日：1996-06-10
申请人： KUROSAKI REFRACTORIES CO
发明人： HORI MITSUJI , FUKUNAGA TETSUO , HORI MAKOTO
IPC分类号： C21C7/10 , F27D1/14
摘要： PROBLEM TO BE SOLVED: To provide an immersion tube for treating molten metal which can be used with its service life kept for a long time. SOLUTION: The immersion tube for treating the molten metal is provided with an inner cylindrical refractory 1 immersed in the molten metal with the inner part as a flowing passage of the molten metal. In the case, refractory regular-shaped bricks 3 are arranged on the is outer peripheral side of a metallic cylinder 2 embedded and fixed into the inner cylindrical refractory 1 as a core metal. Then, the brick 3 is connected with the metallic cylinder side with a bolt 4 and the interval of a joint 3a, 3b between the bricks is made to

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