JPS6126861Y2 - - 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, because the lining made of monolithic refractories is formed by on-site construction, local non-uniformity tends to occur, and if one part peels off, adjacent parts will peel off one after another, and the construction process will take a long time. Ta.

(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 structure of the invention has excellent wear resistance on a metal substrate.
At least one side of the metal substrate is provided with a mounting piece projecting outward from the side edge of the refractory layer and an engaging notch cut out inside, and the opposite side thereof is characterized by providing an engaging projection protruding outwardly to correspond to the engaging notch and an engaging notch cut out inwardly to correspond to the mounting piece; The present invention will be explained in detail with reference to illustrated embodiments.

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. Furthermore, in the first embodiment shown in FIG. 1, the metal substrate 1 has a welding mounting piece 4 extending outward from the side edge of the refractory layer 3 on one side thereof;
Continuing from one end of the mounting piece 4, an engagement notch 5 is provided which is cut inward from the side edge of the refractory layer 3, and the opposite side thereof extends outward to correspond to the engagement notch 5. In the second embodiment shown in FIG. Mounting pieces 4 on the two adjacent sides
and an engagement notch 5 are respectively provided, and an engagement notch 6 and an engagement protrusion 7 are provided on the other two sides, respectively. Note that the shape of the metal substrate 1 is not limited to a square, and may be a polygonal shape such as a triangle or a hexagon in addition to a rectangle.
The position and shape of the mounting piece 4, the engagement notch 5, or the corresponding engagement notch 6 and engagement protrusion 7 are free. Furthermore, as the refractory layer 3, in addition to those mentioned above, Al ₂ O ₃ 58%, SiO ₂ 32%, added moisture 10%
The bending strength at 1000℃ is 100Kg/
cm ² castable refractory, Al ₂ O ₃ 87%, SiO ₂ 6
Of course, it is possible to use plastic refractories and various other monolithic refractories having a composition of 7% added moisture and a bending strength of 220 kg/cm ² at 1000°C.

With this structure, polygonal metal substrates 1 are attached to the steel plate constituting the furnace body in close contact with each other, so that a layer of uniform thickness is formed on the surface of the metal substrate 1, resulting in excellent wear resistance. The refractory wall surface is made up of the refractory layer 3, and when installing it to the furnace body, for the first row, there is a mounting piece 4 extending from the end surface of the refractory layer 3 on one side of the metal substrate 1 and its mounting piece 4. Both the engaging protrusions 7 provided on the opposite sides are fixed on the furnace body by welding or bolting, and for the second and subsequent rows, the engaging protrusions 7 formed on the metal substrate 1 of the already fixed refractory furnace wall material are fixed. It can be firmly mounted on the furnace body by simply inserting and engaging the engaging protrusion 7 into the mating notch 5 and then welding and fixing only the mounting piece 4 on the opposite side to the furnace body. Since a relatively small amount is required, efficient work can be performed. Moreover, the mounting state is as shown in FIG. 2, in which the mounting piece 4 and the engagement notch 6 are engaged, and the engagement protrusion 7 and the engagement notch 5 are engaged and engage with each other. , the refractory layers 3 are in close contact with each other, resulting in a strong refractory wall surface with no exposed portion of the metal substrate 1. In addition, the refractory layer 3 deposited on the metal substrate 1 is provided with an engaging part 8 such as a stepped part or a tapered part at its edge as shown in FIG. The meshing parts 8, 8 on the edges of adjacent refractory furnace wall materials may be meshed with each other to prevent flame from entering the furnace body through the gap between them. Furthermore, as shown in FIG. 5, a heat insulating layer 9 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. , the insulation layer in this case〓〓〓〓〓
Examples of 9 include 30 to 40% by weight of Al ₂ O ₃ and 35 to 40% by weight of SiO ₂
It is common to use an insulating castable whose main material is 45% by weight. 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 invention consists of a refractory layer with excellent wear resistance bonded to a uniform thickness on a metal substrate, so this metal substrate can be attached to the furnace body. By welding and installing it, you can easily create a fire-resistant wall surface with excellent wear resistance.
A mounting piece and an engagement notch are provided on at least one side of the metal substrate, and an engagement protrusion corresponding to the engagement notch and an engagement piece corresponding to the attachment piece are provided on the opposite side, and the metal substrate is first attached to the furnace body. Insert the engagement protrusion of the other refractory wall material into the engagement notch that is set back from the end surface of the refractory layer of one of the attached refractory wall materials, and then attach only the mounting piece on the opposite side to the furnace body. It has the advantage that it can be quickly and firmly attached to the furnace body by welding, etc., and the construction time required for lining the furnace body can be reduced by approximately 50% compared to conventional construction methods. Furthermore, since this invention can be mass-produced at a factory with constant quality, the quality is more stable than conventional linings that are constructed on-site.Furthermore, each lining is installed independently on the furnace body, so there is no need for repairs. It has various advantages such as being able to easily repair it by replacing only that part when it occurs, and it has great practical value as it solves the problems with the lining of the conventional furnace body. .

[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 plan view showing the state of use, and Fig. 3 is a partially cutaway perspective view showing the second embodiment of the present invention. The partial cutaway perspective views, FIGS. 4 and 5, are the fourth part of the present invention.
FIG. 7 is a cross-sectional view showing a fifth example. 1: metal substrate, 2: anchor, 3: refractory layer,
4: Mounting piece, 5: Engagement notch, 6: Engagement notch,
7: Engagement protrusion. 〓〓〓〓〓

Claims (1)

[Claims for Utility Model Registration] 1. Refractory layer 3 with excellent wear resistance on metal substrate 1
At least one side of the metal substrate 1 is provided with a mounting piece 4 projecting outward from the side edge of the refractory layer 3 and an engaging notch 5 cut inside. The refractory furnace is characterized in that an engaging protrusion 7 extending outward to correspond to the engaging notch 5 and an engaging notch 6 cut out inside to correspond to the mounting piece 4 are provided. wall material. 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 metal substrate 1 is square, and the mounting piece 4 and the engagement notch 5 are provided on one side, and the engagement notch 6 and the engagement protrusion 7 are provided on the opposite side.Claim 1 of Utility Model Registration Refractory furnace wall material according to item 1 or 2. 4. A utility model in which the metal substrate 1 is square, the mounting piece 4 and the engagement notch 5 are provided on two adjacent sides thereof, and the engagement notch 6 and the engagement protrusion 7 are provided on the other two sides. Registered Claims Paragraph 1 or 2
Refractory furnace wall material as described in section.