Monolithic refractory applying method and monolithic refractory used thereof
A construction method and refractory technology, applied in the direction of lighting and heating equipment, furnace, lining repair, etc., can solve problems such as nozzle clogging, difficulty in spraying construction, and decline in workability, so as to reduce water, improve the effect of water reduction, and facilitate construction. excellent effect
Inactive Publication Date: 2009-08-19
NIPPON STEEL CORP
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Problems solved by technology
Nevertheless, the addition of a coagulant increases the viscosity of the monolithic refractory, and the phenomenon of bleeding occurs between the added refractory coarse particles, between the metal wires, or the refractory coarse particles and the metal wires are close to each other, and nozzle clogging is prone to occur. Disadvantages of significantly reduced constructability
In addition, when the monolithic refractory containing refractory fine powder is combined with refractory coarse particles or wires to improve fluidity, the viscosity increase is particularly significant after adding a coagulant, and it is substantially difficult to perform spraying construction.
[0010] As a construction method for monolithic refractories, a centrifugal projection method with a horizontally rotating impeller was proposed in Japanese Patent Publication No. 50-39403. However, compared with the above-mentioned spraying construction, the construction body adhesion and durability of this method are inferior. There is a large gap in corrosion resistance and cannot be popularized
Method used
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Embodiment 1
[0065] Embodiment 1~13 is to use above-mentioned Figure 1~3 The impeller-type construction device shown is used for construction. After pre-adding construction water and kneading, put the monolithic refractory into the hopper, and add the coagulant while centrifugally projecting. The construction condition is spray speed: 6m 3 / hour, the diameter of the impeller: 500mm, the number of rotations: about 800rpm. In Comparative Example 5, centrifugal projection construction was carried out without adding monolithic refractories and coagulants. Other conditions were carried out in the same manner as in Example 1 above.
[0066] Comparative Examples 1 to 4 and Comparative Example 6 are equivalent to Figure 6 The thermal spraying apparatus shown sprays the monolithic refractories shown in the table. The monolithic refractory shown in the table is added with construction water, and after mixing, it is sent to the nozzle by a pressurized delivery pump, and the coagulant is added t...
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Abstract
The present invention provides a construction method and a monolithic refractory used in the method, which are better in workability of a monolithic refractory to a molten metal container, a molten metal processing device, or a high-temperature furnace, and the life of a construction body, etc., compared with the conventional spraying method thing. The monolithic refractory compounded with refractory aggregates and dispersants, mixed with construction water in advance and stored in the loading hopper, is sent out from the bottom of the loading hopper while adding coagulant, and then centrifugally projected, and the refractory aggregates in it are The material is composed of volatile silica and / or calcined alumina. Because the monolithic refractory is sent from the bottom of the charging hopper, it is enough to impart a little fluidity to the monolithic refractory, and the water required for construction can be greatly reduced. In addition, projecting with a certain angle width can easily carry out partial construction.
Description
technical field [0001] The present invention relates to a method for constructing a monolithic refractory to a molten metal container, a molten metal processing device or a high-temperature furnace, and the monolithic refractory used in the method. technical background [0002] Conventionally, thermal spraying with a monolithic refractory has been performed as a furnace lining such as a molten metal container, a molten metal processing apparatus, or a high-temperature furnace, or a repair method thereof. The method as Figure 6 In the explanatory diagram shown, the monolithic refractories pre-mixed with added construction water are transferred to the nozzle 36 by the pressurized delivery pump 34 through the pressurized delivery pipe 35, and the coagulant in the coagulant tank 37 is compressed with air. Compressed air from machine 38 is added to nozzle 36 for spraying. This construction method is disclosed in, for example, JP-A-10-182246 and JP-A-10-95678. [0003] This met...
Claims
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IPC IPC(8): F27D1/16
CPCF27D1/1636F27D1/16
Inventor 池部哲则古田洋一喜文字润白曼统一后藤洁中村幸弘河野幸次山田泰宏
Owner NIPPON STEEL CORP