JPS6126860Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is applicable to various types of furnace bodies such as industrial kilns and cement kilns, their exhaust ducts, and other furnace wall linings that require fire resistance and wear resistance. This relates to refractory furnace wall materials used in

(Prior art) Monolithic refractories with a bending strength of 100 kg/cm ² or more under operating temperature conditions have been mainly used for the lining of furnace walls, which require fire resistance and wear resistance. Because shaped refractories have weak adhesion to the steel plates that make up the furnace walls, it is necessary to first weld an anchor to the surface of the steel plate, and then attach monolithic refractories on top of it. When it is required to make things thinner, short anchors with insufficient holding power must be used, and an extremely large number of anchors must be welded to the surface of the steel plate that makes up the furnace body. There was a problem in that the construction required a lot of effort and cost. In addition, since linings made of monolithic refractories are formed on-site, construction takes a long time, and the completed lining tends to be partially uneven, and if one part peels off, adjacent parts will peel off one after another. There were also other problems.

(Purpose of the invention) The present invention solves these problems and is a refractory material that is easy to install, has no risk of peeling, and can form a homogeneous furnace wall surface with excellent fire resistance and wear resistance. It was completed for the purpose of being used as a wall material for sex furnaces.

(Structure of the invention) The present invention has a refractory layer with excellent abrasion resistance layered on a metal substrate, and a part or all of the periphery of the metal substrate is formed into a mounting portion extending from the refractory layer. It is characterized by this.

Next, the present invention will be explained in detail with reference to illustrated embodiments.

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In the first embodiment shown in FIG. 1, reference numeral 1 is a rectangular metal substrate made of ordinary steel plate or stainless steel plate with a side of about 250 to 300 mm and a thickness of 3.2 mm. A suitable number of anchors 2 are provided. Reference numeral 3 denotes a refractory layer deposited on the surface of the metal substrate 1, and the bonding strength of the refractory layer 3 with the metal substrate 1 is increased by the anchors 2. Note that instead of the anchors 2, the metal substrate 1 may be press-processed to form irregularities on the surface to increase the bonding strength. If it is possible to obtain a bonding strength sufficient for practical use,
It is preferable that the height of the anchor 2 is approximately 5 mm lower than the thickness of the refractory layer 3 so that the upper surface of the anchor 2 is protected by the refractory layer 3 to provide sufficient heat resistance.
Further, the refractory layer 3 is made of, for example, Al ₂ O ₃ , Al ₂ O ₃ −
It consists of a monolithic refractory made by bonding SiO ₂ , SiC, or a mixture thereof with a binder such as alumina cement or phosphoric acid binder.
The refractory layer 3 of this example contains 85% Al ₂ O ₃ , 8% SiO ₂ ,
A ramming refractory having a composition of 5% added moisture and a bending strength of 270 kg/cm ² at 1000°C is bonded onto the metal substrate 1 by press molding, dried, and then attached to the anchor 2 on the surface of the metal substrate 1. A refractory layer 3 with a uniform thickness of 30 mm and firmly held is formed. Further, as shown in FIG. 1, each corner of the refractory layer 3 is cut out in the shape of a right-angled isosceles triangle, and one diagonal corner corresponding to a part of the periphery of the metal substrate 1 is covered with a refractory layer. Attachment parts 4a, 4a that can be welded to the furnace wall are formed extending from the refractory layer 3 with a width of about 5 mm, and the other diagonal part is also extended from the refractory layer 3 in the shape of a right-angled isosceles triangle with both sides of 25 mm. Mounting parts 4b, 4b which can be welded to the exposed furnace wall are formed, and an anchor 6 for holding a monolithic refractory, which will be described later, is implanted in the mounting part 4b. Note that the shape of the metal substrate 1 is not limited to a square, but can be a polygon such as a triangle or a hexagon in addition to a rectangle, and the position and shape of the mounting part are free, for example. As in the second embodiment shown in FIG.
Attachment portion 4c whose corner portion extends from the refractory layer 3
Even if bolt insertion holes 5 are formed in this mounting portion 4c, or the entire peripheral edge of the metal substrate 1 is extended from the refractory layer 3 as in the third embodiment shown in FIG. It may also be part 4d. Furthermore, as the refractory layer 3, in addition to the above-mentioned materials, Al ₂ O ₃ 58
%, SiO ₂ 32%, added moisture 10% composition 1000
A castable refractory with a bending strength of 100Kg/ ^cm2 at 1000℃, with a composition of 87% Al ₂ O ₃ , 6% SiO _{2 and} 7% added moisture, and a bending strength of 220Kg/cm 2 at 1000℃.
Of course, plastic refractories of cm ² and various other monolithic refractories can be used.

This configuration includes a furnace body 8 made of steel plate.
A large number of polygonal metal substrates 1 are arranged within the metal substrate 1 with their end surfaces in close contact with each other, and mounting portions 4a, 4b, 4c are formed to extend from the refractory layer 3 on a part or all of the periphery of the metal substrate 1. , 4d is used to line the furnace body 8, and in the case shown in FIG. Since the four attachment parts 4a and 4b protruding from the bottom come together, a welding rod is inserted from this part, and the oblique side of the attachment part 4a and both sides of the attachment part 4b are welded to the furnace body 8, and the fourth In the case shown in the figure, bolts are installed in the furnace body 8 in advance, and the bolt insertion holes 5 of the mounting part 4c are
Attachment is carried out by inserting the bolt and fixing it with a nut.Furthermore, in the case shown in FIG. 5, the attachment portion 4d is attached by welding the entire circumference or several places to the furnace body 8. After the installation to the furnace body 8 is completed in this way, a gap is formed in the butt part of each attachment part that protrudes from the refractory layer 3, so in this gap part, the same type of material as the refractory layer 3 is When the monolithic refractories 9 are filled, the furnace body is lined with a uniform thickness by the refractory layer 3 and the monolithic refractories 9, which are bonded to the surface of the metal substrate 1 to a uniform thickness, thereby improving fire resistance and durability. This creates a fire-resistant wall surface with excellent abrasion resistance, and this series of operations is extremely simple and there is no risk of peeling. In addition, in the first embodiment shown in FIG. 1, the anchor 6 provided in the attachment part 4b is effective for increasing the bonding strength of the monolithic refractory 9, but since the area of the attachment part is relatively small, the anchor 6 is provided in the attachment part 4b. 6 may be omitted. Further, the refractory layer 3 deposited on the metal substrate 1 is provided with an engaging part 10 such as a stepped part or a tapered part at its edge as shown in FIG. When the meshing portion 10 of the edge of the adjacent refractory furnace wall material is
It is also possible to prevent the flame from entering the furnace body 8 side through the gap between the 10 pieces when they are engaged with each other.
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Furthermore, as shown in FIG. 7, a heat insulating material layer 11 may be interposed between the metal substrate 1 and the refractory layer 3 instead of directly depositing the refractory layer 3 on the metal substrate 1. In this case, as the heat insulating material layer 11, it is common to use a heat insulating castable whose main materials are, for example, 30 to 40% by weight of Al ₂ O ₃ and 35 to 45% by weight of SiO ₂ . Furthermore, the metal substrate 1 and the refractory layer 3 (not shown) do not necessarily have to be flat, but may be curved in an arc to be applied to a curved surface such as a ceiling, or to be applied to a corner. The cross section may be bent into an L-shape, and the shape and other details of the design may be tailored to the designer's requirements, depending on the structure, size, and other conditions of the furnace body to be constructed. Bye.

(Effects of the invention) As is clear from the above explanation, the present invention has a refractory layer with excellent wear resistance deposited to a uniform thickness on the surface of a metal substrate, so the refractory layer is relatively thin. It can be made thin and lightweight, and since the metal substrate has a polygonal shape, it is possible to easily form a refractory wall surface that covers the entire surface of the furnace body by placing each end face in close contact with the furnace body. It is something that can be done. Moreover, since part or all of the periphery of the metal substrate is formed into a mounting portion extending from the refractory layer, it can be easily and firmly attached to the furnace body by means of welding, bolting, etc. using the mounting portion. By using the refractory furnace wall material of this invention, the construction period required for lining the furnace body can be reduced by approximately 40% compared to conventional methods, and products of constant quality can be mass-produced in factories, making it easier than conventional methods. The quality is more stable than the on-site construction of linings, and since each lining is attached to the furnace body independently, it is easy to replace only that part when repairs are needed. It has various advantages such as being able to be repaired, and is of great practical value as it solves the problems of conventional furnace wall linings.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the first embodiment of the present invention, FIG. 2 is a partially cutaway perspective view similarly shown in a state of use, and FIG. 3 is a partially cutaway plan view.
Fig. 4 is a partially cutaway perspective view showing the second embodiment of the invention, Fig. 5 is a perspective view showing the third embodiment of the invention, and Figs. 6 and 7 are the fourth embodiment of the invention. , is a sectional view showing a fifth embodiment. 1: metal substrate, 2: anchor, 3: refractory layer,
4a, 4b, 4c, 4d: mounting portion, 6: anchor. 〓〓〓〓〓

Claims (1)

[Claims for Utility Model Registration] 1. Refractory layer 3 with excellent wear resistance on metal substrate 1
A refractory furnace wall material characterized in that a part or all of the periphery of the metal substrate 1 is formed as a mounting portion extending from the refractory layer 3. 2. The refractory furnace wall material according to claim 1, wherein the metal substrate 1 is provided with an anchor 2 for holding a refractory layer. 3. The refractory furnace wall material according to claim 1 or 2 of the utility model registration claim, in which the mounting portion is provided with an anchor 6 for holding an embedded refractory. 4. The refractory furnace wall material according to claim 1, 2, or 3, in which the mounting portion is formed with a corner of the metal substrate 1. 5. The refractory furnace wall material according to claim 1, 2, or 3, in which the mounting portion is formed along the entire periphery of the metal substrate 1.