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Construction method of slideway pipe and its thermal insulation protection component

A technology for protecting components and construction methods, which is applied in the direction of pipeline protection, pipeline protection through heat insulation, pipes/pipe joints/fittings, etc., and can solve problems such as construction of unrecorded heat insulation materials

Active Publication Date: 2020-07-07
MAFTEC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Patent Document 1, there is no description of compressing the heat insulating material before construction

Method used

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  • Construction method of slideway pipe and its thermal insulation protection component
  • Construction method of slideway pipe and its thermal insulation protection component
  • Construction method of slideway pipe and its thermal insulation protection component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0163]Polycrystalline alumina / silica fibers containing 72% by mass of alumina and 28% by mass of silica, which have an average fiber diameter of 5.5 μm and do not substantially contain fibers with a fiber diameter of 3 μm or less, are aggregated and needle punched. The resulting needle-punched blanket (trade name MAFTEC manufactured by Mitsubishi Chemical Corporation) TM MLS, thickness 25mm, needle punch density 5 dozen / cm 2 , Bulk density 128kg / m 3 (0.128g / cm 3 ), surface density 3200g / m 2 ) punching process into a ring shape with an outer diameter (diameter) of 390 mm and an inner diameter (diameter) of 270 mm to manufacture an annular needle-punched blanket 10 .

[0164] The residual surface pressure ratio after the cycle test was measured for the ring-shaped needle-punched carpet 10 under the conditions described below, and the residual surface pressure ratio was 33%.

[0165] Conditions: The ring-shaped needle-punched blanket 10 calcined at 1400° C. for 12 hours was ...

Embodiment 2

[0178] [Example 2 (compressing the third compression layer to a stronger degree)]

[0179] The same construction as in Example 1 was performed except that the number of annular needle-punched carpet sheets in the third compression layer L-3 was 28, the compression height was 560 mm, and the compression rate was 20%. The average bulk density and interplane pressure of L-1, L-2, and L-3 (including the uppermost ring-shaped needle-punched carpet 10 ) were measured. The results are shown in Table 1.

Embodiment 3

[0185] Make the ring-shaped needle-punched blanket 10 laminated compacts with the same compression rate as in Example 1, coat the surface with mortar with a thickness of about 3mm, and wind the blanket impregnated with the liquid containing the oxide-containing precursor in the entire thickness direction (relative to The amount of moisture in 100 parts by mass of inorganic fibers is 200 parts by mass, the amount of oxide precursor attached to 100 parts by mass of inorganic fibers is 18 parts by mass (in terms of oxides), and the molar ratio of Al and Ca in the impregnated part (Al / Ca) is 64 and bulk density is 0.41g / cm 3 ), the oxide-containing precursor liquid is to add calcium acetate monohydrate to the alumina sol solution using acetic acid as a dispersant in such a way that the molar ratio of Al to Ca (Al / Ca) becomes 12, and the oxide The converted solid content concentration was adjusted to 7.0% by mass. Calcination was carried out under the conditions of a heating rate...

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Abstract

The present invention provides a slideway pipe with a thermal insulation protection member and a construction method of the thermal insulation protection member which can more fully prevent gaps at the upper end of the thermal insulation protection member. A plurality of ring-shaped needle-punched blankets (10) are wound and installed on the slide tube (1), and squeezed by an extrusion plate (20) to form a first compression layer (L-1). The second compressive layer (L-2) and the third compressive layer (L-3) are formed on the upper side thereof, and are respectively extruded by an extruding plate (20). After the annular needle-punched blanket (10) is filled between the refractory coating (3), the extruded plate (20) is pulled out. Make the compression ratio of the third compression layer (L-3) higher than that of the first compression layer (L-1) and the second compression layer (L-2).

Description

technical field [0001] The invention relates to a construction method of a slide tube in a heating furnace and a thermal insulation protection component thereof. Background technique [0002] As a protective member for a slide tube in a heating furnace in the iron and steel industry, an inorganic fiber aggregate or an inorganic fiber molded body having high thermal shock resistance is used (Patent Documents 1 and 2). [0003] In Patent Document 1, it is described that a slide pipe is covered with an annular heat insulating material made of ceramic fibers. In FIG. 8 and paragraph 0002 of Patent Document 1, it is described that a partly cut ring-shaped heat insulating material is attached to the slide pipe. In Patent Document 1, there is no description of construction after compressing the heat insulating material. [0004] Patent Document 2 describes a heat insulating material construction method in which a plurality of half-shaped ceramic fiber refractory materials are sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/00
CPCC21D1/00D04H1/4209F16L59/147F27D1/12F27D3/02
Inventor 田口昌邦铃木光雄小林友幸矢野晃启
Owner MAFTEC CO LTD
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