JPS60152890A - Method and device for molding refractory lining of liquid metal vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION It also relates to the use of an unshaped refractory product for molding a lining that serves as a safety layer.

The linings of known devices consist of slabs of refractory products that are fixed with mortar to form straight one-pack linings, or one-ply refractory concrete that is spray-painted or troweled.

However, if the container is narrow, it is not always possible to spray paint, and in any case, the container must be completely cooled so that a person can enter the container and install the refractory product during the lining application. No. The assembly must then be dried before use, and then the shaped refractory concrete or product must be preheated at a high temperature.

A first object of the present invention is to overcome the drawbacks of the prior art methods by a method of molding refractory linings for liquid metal containers virtually without touching the interior of the container.

Accordingly, the present invention provides a mold forming method comprising the step of injecting an unformed aggregate-like pyroproduct between the inner wall of the container and a mold pre-installed inside the container. .

The mold provides a substantially uniform thickness of aggregate over the entire portion of the container to be lined.

Using a mold, it is possible to heat the container even if it is not completely cooled.

Furthermore, by providing a heating device in the mold, the lining can be reliably dried.

Another advantage is that the residual heat in the container can be used.

A second object of the invention is to provide an apparatus for molding refractory linings, especially for liquid metal containers. The device of the present invention is composed of a plurality of elements so that it can be freely expanded during use, and also includes a mold having a shape that matches the external shape of the container, mold support and operation means, and fireproof concrete between the inner wall of the container and the mold. and means for supplying fireproof concrete into the space.

Next, details of an embodiment of the apparatus of the present invention will be described with reference to the accompanying drawings.

The device shown in FIG. 1 consists of a mold with two fixed elements 1 and eleven free elements 2, the mold having an operating ring 5a and a uniform thickness of the refractory. It is supported by a reinforcement 3 and a stiffening strip 4 connected to the operating crosspiece 5, which is fitted with a centering element 6, which prevents movement of the mold, and a fixing member 14, which prevents movement of the mold. The free elements 2 are arranged between the fixed elements 1.

The ends of the free element overlap the corresponding ends of the fixed element so that it can slide relative to the fixed part with a stretching effect.

A feed pipe 7, which varies depending on the dimensions of the container C, is connected to the mold bottom by a fitting 8 which can be quickly disconnected to cut off the feed when the product is drying i1J. The supply pipe for this tumor will be described later with reference to FIG.

A removable element 9 is provided which serves to protect the opening and to define the location of the baffle 10 as desired.

The device prepares a water-containing refractory product mix B whose composition is constant before mixing.
This is completed with the installation of a container 11 for containing the product, which is connected to a suction pump (not shown) for delivering the product.

On the inner wall of the mold element, there is a heating system 1 that heats using electrical resistance.
2 is provided and protected by a heat insulating material 13.

The electrical resistance is formed by a mineral insulator coated heating cable consisting of one or more conductive cores embedded in magnesia compressed to high pressure within a continuous liquid-sealed copper jacket.

Both ends of the cable terminate in large diameter, low resistance, cold output ends, with a maximum operating temperature of 250°C, although other suitable heating means may be used.

Mold release oil spray device 1 coupled to a pressurized tank 17
6 is provided.

FIG. 2 shows one of the refractory product and water mixture supply pipes of the apparatus shown in FIG.

The pipe 7 is rigid and has a curved upper part.

At its two ends there is a quick-release joint 8 which ensures the connection between the lower end of the pipe 7 and the supply end element 20 .

The end element has a diverging shape and comprises a frustoconical portion 21 and an end flange 22 that contacts the underside of the mold bottom 23. The end element 20 also includes an ear portion 25 that fits from below into an orifice 24 formed at the bottom of the mold and engages with a radial recess 25a provided in the orifice 24 to prevent rotation. The pipe 7 has a support 27 fixed to the operating crosspiece 5 at a certain distance from the joint 8.
By contacting the end element 2o with the mold bottom 23
It has a bearing flange 26 which is held in contact with the lower side of the flange.

Moreover, two welding handles 28 for operating the quick release joint 8 are provided above the flange 26.

At the opposite end of the fitting 8 is provided a similar fitting 29 which connects the pipe 7 to the pump of the infusion device.

Since the end element 20 has a truncated conical shape, the flow of the refractory concrete is smooth.

A feature of the above structure is that the injection pipe can be removed from the outside of the mold, making it easy to clean the pipe.

FIG. 3 is a cross-sectional view of the device of the invention showing details of the mold of FIG. 1;

The apparatus shown in FIG. 3 consists of a sheet metal container C provided with a permanent or safety lining 30, which is placed in place by means described below with reference to FIG.

In the center of the container with a safety layer or lining 3o is arranged a mold similar to that in FIG. 1, the free element 2 of which is shown in the molten metal injection orifice.

The resistance heating system 12 is arranged in a heat insulating layer 13 covered by a heat insulating cover plate 31 .

A sheet brick 3 is placed in the orifice 32 area at the bottom of the container C.
3 are arranged and are reliably aligned by a spigot 34. The spigot has a frustoconical light t in contact with the frustoconical surface of the channel formed in the sheet brick 33.
It has lij35. The fixing elements 2 of the mold each include a reinforcing member constituted by a rib 37.

A tube 38 on which a rotating shaft 39 is disposed is fixed above each centering spigot 34 .

An operating wheel 40 is provided in the upper part of the rotating shaft located on the upper part of the operation cross member 5, and a nut 4 is provided in the lower part.
A threaded portion 41 is provided which cooperates with 2. A link 43 is pivotally connected to the nut 42 and is pivotally connected to an arm 44 that holds the sheet brick in place.

The lower end of the arm 44 is provided with an outwardly extending hook portion 45, and the upper end of the arm is pivoted to an ear portion 46 fixed to the spigot 34.

The link 43 can be driven by electric means, hydraulic means, or pneumatic means.

By configuring the mold in this way, the sheet bricks can be placed in a fixed position inside the heated container.

The sheet brick 33 is held in place by two arms 44 so that the exact location of the injection orifice relative to the mold is defined.

Also, the immersion nozzle (not shown) can be installed in the same manner and perfectly positioned relative to the mold.

FIG. 3 shows an apparatus according to the invention for injecting the refractory concrete constituting the wear-resistant lining 47 of the container to ensure that the sheet bricks 33 are held in place.

As can be seen in the figure, a sealing element 48 with gas vent holes 49 is provided around the upper part of the mold, so that the gap between the mold 2 and the safety lining 30 is filled with refractory concrete. Can be successfully delivered.

The apparatus shown in FIG. 4 is suitable for the continuous formation of safety and wear-resistant linings of containers by a process similar to that described above.

The device consists of a mold 50 forming a wear resistant lining similar to that of FIG.

The mold fits into a safety lining mold 51 of generally similar shape and dimensions.

A spacer member 5M is fixed to the inner wall of the mold 51 for aligning the two molds, ensuring a relative spacing, and transmitting molding force from the safety lining to a rigid support structure that supports the molds.

Furthermore, this configuration allows the use of a single support, cradle and centering device consisting of the crossbeam 5 and associated elements, and
Deformation of the envelope or assembly 50 for the container C,! jl
The thickness of the wear-resistant lining can be kept constant regardless of the displacement of the wear-resistant lining.

The bottom 52 of the safety lining mold is in contact with the bottom of the sheet metal container C in the sheet brick area.

Said area is provided with an alignment projection 52a that fits into a corresponding orifice 32 of the container C.

Elsewhere it is spaced from the bottom by a distance equal to the thickness of the transverse lining in FIG.

The safety lining mold 51 has a fastening device (not shown) that joins and holds the upper flanges 53 and 54 of each mold.
It is fixed to the wear-resistant lining mold 50 by.

Further, in the upper part of the mold 51, a receiver 55 is provided which forms a receiving surface for the sealing element 48 during molding of the safety lining.

The safety lining is formed in the same way as the wear-resistant lining, by means of the same feed pipe introducing the mortar for forming the lining between the mold 51 with the quick-release joint and the frustoconical end element and the container C.

By combining the abrasion lining mold with a plurality of safety lining molds of different dimensions, the thickness of the 1IllI abrasion lining can be selected depending on the application of the container.

The two molds 50,51 constitute an interfitting assembly so that during the formation of the safety lining 30, the moldco 1 can be held in place to hydraulically harden the safety lining and the mold 50 can be used in an adjacent container.

Although the apparatus of the present invention has been described above with respect to forming pouring distributor linings, the method may also be used for forming pouring or transfer ladles, converter furnace sprues, blast furnace runners, and injection or stirring rondes. I can do it.

However, the above uses are not limited.

By using two mutually compatible molds, the abrasion-resistant lining of the pouring ladle can be made thinner, so that for a given overall thickness, the insulating lining can be made considerably thicker.

By means of the method of the present invention, it is possible to form a safety lining that is thick and has a high thermal insulation effect, and a wear-resistant lining that is thin and has a low thermal insulation effect but has a high strength.

Also, because the method is rapid, the wear-resistant layer can be replaced more frequently, thereby increasing the utilization of the ladle or container.

Unformed refractory products contain chemical or hydraulic hardening agents that ensure hardening at the temperature of the heated mold or container, magnesia and other products, and cure when contacted with liquid metals. 1! It is a ceramic that has high heat. The particle size of the product is
Varies depending on its use.

Therefore, it can be seen that with the above configuration, the 11-person lining can be installed on the inner wall of the liquid metal container quickly and without touching the container.

An advantage of the method of the invention is that it can be used with any type of unformed refractory concrete or other concrete. The wear-resistant lining and the safety lining can be made of the same material.

[Brief explanation of the drawing]

FIG. 1 shows the various elements of the mold placed in place within the container. FIG. 1 is a schematic longitudinal sectional view of the device of the present invention. FIG. 2 is an elevational view of a pipe supplying a refractory product mixture. FIG. 3 is a cross-sectional view of a preferred embodiment of the apparatus of the invention, showing the means for stationary installation of sheet bricks serving as sprues. and FIG. 4 is a sectional view similar to FIG. 3, showing another embodiment of the device according to the invention, with a safety lining mold. <Explanation of symbols of main parts> 1...Fixed element, 2...Free element, 3...Reinforcement element,
4... Town sex strip, 5... Manipulative exploitation, 6
... alignment element, 7 ... supply pipe, 12 ... heating system, 14 ... fixing member, 30 ... lining, 3
I... Spigot, 37... Rib, 38... Pipe, 4
3... Link, 44... Arm, 47... Lining, 50.51... Mold, 51a... Spacer member, 52a... Projection, C... Container. Continued from page 1 0 Inventor Jean-Marie Totes 0 Inventor Guy Prioretty @ Inventor Vinyl Henry 〇 Applicant Vinyl Henry Belgium, 5051 Bolin, Ludou Village 12 France, 54400 Longriver, Lux Saint-Louis France Country, 54410 Ronneveville-de-Nancy, Ludeau-L'Etang 23 France, 54410 Lonneveville-de-Nancy, Ludeau-L'Etang 23

Claims (1)

[Claims] 1/& A method for forming a refractory lining for a container, the method comprising: forming a refractory lining on the inner wall of the container and the entire container portion to be lined; heating and drying the lining aggregate with heating elements disposed on the mold wall, comprising the step of introducing a refractory product in the form of unformed bone phase between the mold and the forming mold to substantially uniform the thickness of the lining aggregate;
How to make it a percentage. 2. The method according to claim 1, characterized in that the aggregate is introduced between the inner wall of the container and the mold by inhalation or injection. 3. The method according to claim 1 or 2, characterized in that the aggregate is introduced while the container is hot due to previous use, thereby drying the lining bone phase with the residual heat of the container. how to. 4 A device for forming refractory linings for liquid metal containers,
An apparatus for carrying out the method according to any one of claims 1 to 3, wherein the mold is formed into a container shape made up of a plurality of elements so that the mold can be freely expanded during use. a compatible forming mold, means for supporting and manipulating the mold, means for centering and securing the mold relative to the container so as to define a space for receiving the aggregate between the interior wall of the container and the mold, and supplying the space with aggregate. A device characterized in that it consists of means for. 5. The device according to claim Iliα, Paragraph 4, paragraph 4, in which the mold has two fastening elements supported by reinforcements fixed to the operating crosspiece, and also attached to the crosspiece. A device characterized in that it consists of one free element supported by a flexible strip. 6. The device according to claim 5, wherein the centering fixing means comprises a centering member connected to the crosspiece;
and means for securing the mold to the container. 7. The device according to any one of claims 4 to 6, wherein the refractory aggregate supply means is fixed to the cross member and terminates in a quick-release joint in the mold wall region. , a device characterized in that it consists of a pipe connected to a lined substance containing tank. 8% Allowance The device according to any one of claims 4 to 7, characterized in that the molded element is provided with a heating means disposed in contact with an inner wall of the element within a heat insulating layer. device to do. 9. The device according to any one of claims 4 to 8, further comprising a release oil spray device. 10% allowance In the device according to claim 7, the conduit fixed to the operating crosspiece is provided with a receiving flange that abuts a support connected to the crosspiece and has a quick-release joint. comprising at least one rigid pipe extending into the mold bottom orifice and connected at an edge to a divergent end element abutting the underside of said bottom. device to do. 11. The device according to claim 10,
Apparatus wherein the end element has an ear which engages an orifice cutout in the bottom of the mold to hold the element against rotation. 12. The apparatus according to any one of claims 4 to 11, wherein the mold comprises a means for aligning sheet bricks forming a sprue of molten material, and a refractory liner. A device characterized in that it consists of means for placing sheet bricks in place before forming. 13. The device according to claim 12,
The centering means comprises a sleeve having a frustoconical outer surface and fixed to the bottom of the mold so as to project downwardly therefrom, and fitted into a corresponding frustoconical aperture of the sheet brick. The sheet brick mounting means has a retaining arm hinged to the sleeve and hinged to a nut cooperating with a threaded end of a drive shaft disposed in a tube coaxial with the sleeve. A device characterized in that it is comprised of a mechanism that operates with a fixed link. 14. The apparatus according to any one of claims 4 to 12, wherein the mold is provided with a waste removal hole in an upper part thereof for reliably delivering the refractory at the filling end. 15. Apparatus according to any one of claims 4 to 14, characterized in that the mold forms an abrasion resistant lining of the container and further comprises: a sealing element; another mold for forming a safety lining having similar dimensions and shape as the mold for the wear resistant lining, the mold for the wear resistant lining being fitted into the mold for the safety lining, and A device characterized in that these two molds are joined at their upper edges by a fastening device and are separated by a spacer section connected to the safety lining mold. 15. The device described in 15 Dust,
Apparatus characterized in that the bottom of the safety lining mold has a protrusion that contacts and aligns with the container bottom in the container portion containing the sheet brick. 17. A method for molding a safety lining and an abrasion-resistant lining into a liquid metal container using the apparatus according to claim 15 or 16, the method comprising: molding a safety lining mold and a wear-resistant lining in the center of a thin plate case; installing a mutually compatible assembly with a wear lining mold between the walls of the case and the safety lining mold;
introducing an unformed aggregate-like product forming a safety lining, curing said product, and recovering said assembly for emplacement of a mold for the wear lining in a container provided with a safety lining. introducing a refractory product in the form of unformed aggregate, which constitutes the wear-resistant lining, between the walls of the safety lining and the wear-resistant lining mold; and after curing the wear-resistant lining. , a method comprising the step of recovering the wear-resistant lining mold. 18. The method according to claim 17, comprising:
The safety lining mold is fitted into the abrasion resistant lining mold, and the safety lining mold is fixed by fitting within the case of the assembly formed by the two molds. A method characterized in that the sequential supply of the products forming the safety lining and the wear-resistant lining is ensured by the same pipe supplying the products through the bottom.