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AssigneeKurosaki Refractories Co., Ltd.
InventorsSueki Kubo, Toshiro Watanabe, Masayuki Fujita, Tadahiko Matsuno, Akira Morita
Estimating the term…
Refractory material in wet slurry form is applied onto the inner surface of a furnace. The improvement is characterized in that the water to be added into the powder-like refractory material for producing the above slurry refractory material is finely and accurately regulated so that the resultant refractory material sprayed from the spray nozzle fixedly adheres onto the abraded or eroded portion of the inner surface of the furnace with a minimum amount of rebound loss.
An apparatus for applying a refractory material onto the inner surface of a furnace comprising in combination:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Repairing linings by projecting or spraying refractory materials on the lining: using a gunning apparatus
Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups…
Arrangements for mounting, supporting or holding spraying apparatus: arrangements for adjusting the position of spray heads
Equipment used for making or repairing linings: hot fettling; Flame gunning
Term ended 30 Sep 1997 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The invention relates to an apparatus for applying a lining of refractory material, cement, heat insulating material and other insulating materials over the refractory layers of a converter or a furnace including an electric furnace and an open-hearth furnace or a vessel with a great reliability.
In conventional lining operations, the lining material is produced away from the lining operation site and then is transferred to the operation site by means of a long compression supply tube wherein the long floor-laid tube hampers the movement of the lining device when it must move from one converter to another, resulting in an inefficient lining operation.
Furthermore, since the water storage tank, refractory material tank, compressor and the like which are required in the lining operation occupy a large floor area, the operation cannot be conducted efficiently or with adequate mobility.
FIG. 1 is a plan view of the lining apparatus of this invention which is provided with the water regulating system.
FIG. 2 is a side view of above apparatus taken along the line I--I of FIG. 1.
FIG. 3 is another side view with a part broken away of the apparatus taken along the line II--II of FIG. 1.
The apparatus for repairing the furnace lining is described in conjunction with the attached drawings. Referring to FIG. 1 through FIG. 3, there is shown a transport car 2 provided with wheels 4 driven by hydraulically-operated motors so that the car 2 is movable both backwards and forwards. Above and substantially parallel to the transport car 2, there is shown a shooting pipe 8 of duplicate construction consisting of an inner pipe 10 and an outer pipe 12.
The inner shooting pipe 10 of a square hollow cross-section is provided with a spray nozzle 14 at the front extremity thereof and has the rear end thereof rotatably connected by a specifically devised swivel joint 15 with a flexible hose 16 through which refractory material in either dry or wet form is supplied to the inner shooting pipe 10.
The other end of the flexible hose 16 is connected to a refractory material supply source which is described later. The inner shooting pipe 10 is slidably disposed inside the outer shooting pipe 12 such that the shooting pipe 8 as a whole can be extended in a telescopic manner. This shooting pipe 8 is also provided with a cooling system which is shown in FIG. 4 to FIG. 7 in detail.