JPS61500920A - Improvements in the outer shell of Cowper or similar devices - 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] Improvements to the outer shell of carabar or similar devices Is this invention a blast furnace's Kalapar hot air? Part 5: A hot-blast stove that begs to be sent strictly to the nozzle. It is the father of a heat exchange device that reheats internally.

The above-mentioned device has an α'i wall made of a tempered metal plate, and a plate is welded on the side. There is a cupola 7 mounting plate consisting of: The case formed by the meter and cupola Sing surrounds Burning 1 and Chinisoka Ri and 7.

The various conditions that occur inside the Calabar hot air stove, especially the temperature order (1500 Defects often occur in the metal plates of Calabar hot air stoves. lol for several years After operation, external cracks occur, especially in the dome and combustion shaft sections.

This crack (starting from the inner wall 1j of the wall, mainly near the welding area, Parallel or perpendicular. Cracks are areas with high tensile stress acting on the metal shell, and are It is caused by the erosive action of the acetic acid formed in the alkali.

This is therefore an example of a stress corrosion cracking phenomenon.

These defects can be of large proportions and may require complete replacement of the device. Ru. This is extremely expensive (in millions) and, on the other hand, it is difficult to use this device due to the lack of equipment. This results in complete shutdown of the blast furnace.

This shortcoming? In order to overcome K, in France % license PR 2526810 Calaper fever A second outer shell is installed around the wall of the furnace, and a glass is installed in the space formed by the first outer shell. Filler 'I:FY' based on hydated silicone carbide.

The purpose of the present invention is to provide a double shell for internal insulation and thermal stress on the load. Easy to communicate and laugh To be

The present invention, which has a different purpose from the above-mentioned object, is as follows: The shell is distributed parallel to the temporary first wall filled with welded metal and the outside of the first wall. The space formed by both walls is made of C42 made of metal and board; In the case where the filler material is heated, the filling material is embedded in the hot lachrymal oil base and the sore convex mixture. Nada now 74 Mata ~ - Nagokin school t bass to r　”=.

The present invention (1) Furthermore, the above-mentioned 7 hills at the bottom of the outer thigh groove: ・[Regarding 5 inner da; gold, 4 parallel to the temporary wall The second outer ζ tung metal 4-plate wall placed in If a space is formed f6, the space-required metal or alloy grains and Fill the urinary stone with a binder and a urinary stone filling.

Due to other characteristics - The size of the metal particles is between L-0.2 and 2, preferably from 0.5 to 'i, 5xi. Take a break between.

Aluminum or aluminum-based alloy steel is used.

The Mei 3 row and drawings used as examples of this civilization will be explained.

FIG. 1 is a sectional view of the outer shell of a Kalapar hot air stove with a grooved bottom according to the present invention.

FIG. 2 is a sectional view showing an example of F5 in which the wall portion has a variable thickness.

Figure 1 shows a part of the outer shell of equipment such as a Calabar hot air stove, with the inner metal made of welded metal plates. The wall has a thickness of, for example, between 15 and 50 m. Inside the refractory lining device Install it on the wall facing the

Metal plate strips 5 are arranged horizontally and vertically 1 on the outside of the inner wall 1.

Welded to a second series of metal plates forming the outer wall 4.

A filling material 6 is filled in a region 5 formed between both walls and the intermediate piece 5.

It is preferable that the outer wall is made of the same material as the inner wall, and has the same thickness as the inner wall.

Regarding this point, is the Molecular 8 example shown in Figure 2 part of the outer shell? Shows variable thickness of inner and outer walls shall be. For example, the inner wall has a thickness of Y24 at the bottom 1a and a thickness of Y17 at the top 1b. Make it a dragon. For this reason, the thicknesses of the outer walls 4a, 4b are also varied as shown in the figure. in the same way The thickness of the spaces 5a and 5b formed between the two walls varies, for example, between 5 and 50 mm. do.

A thickness of about 10 mm is suitable.

According to the invention, the material filling the space formed between the two walls is aluminum or The size of one particle of aluminum alloy grains is, for example, between 0.2 and 2u, and between 0.5 and t. Approximately 5xrx is particularly suitable. Selection of the average size of metal grains is the highlight of '14 cutting. filled, in each case smaller than the minimum width of the space between the two walls.

Regarding the composition of the metal grains, aluminum or preferably aluminum alloy grains are used. or other metals or light alloys with high thermal conductivity.

The gaps between the metal particles are filled with a binder and filled with one resin or a thermosetting resin mixture. A binder that can withstand temperatures of 110°C or higher. This resin is ff1J For example, phenol polycrethane resin, in powder or liquid gel form, necessary for curing. Contains additives χ, which are normally used to mold or cast resin Contains fillers.

Regarding the ritual method, fill in the highlights as follows. First, the coating of metal grains Is it done in-house and made into powder or liquid-gel resin? use.

Next, the above-mentioned mixture is inserted by injection or injection, and if necessary, nitrogen or other gas is added. Neutral gas? The tube 8 is inserted into the orifice 7 by screwing, for example. vinegar. An exhaust port is provided in the same wall 4 as required. Insertion of the mixture is carried out under cold conditions.

Vibration is applied during or immediately after the filling process to completely fill the spots. This work is performed using high frequency single This is done using a directional vibration device.

Curing of the resin occurs between r20 and 60 m1n after the mixture has been introduced. This time the mixture Determined by the proportion of curing agent contained within.

Slightly increase the temperature if necessary to promote hardening.

Next (Seal off orifice 7. Use a stopper etc. screwed or welded into the orifice. Therefore, the continuity of the outer wall 4 is maintained.

This type of filling is particularly suitable.

As an advantage: Good thermal conductivity avoids high temperature gradients between the two walls! ! e Stress due to swelling difference is limited.

The space between the two walls is completely filled with resin filling the gaps between the metal particles. Pressurizing the space between the two walls and cuff bar removes corrosive gases or liquids from the hot air stove casing. Prevent the flow of such substances towards the new shell.

The filling material used is nitrogen, so that it will not be eroded by fire, and even after the inner wall cracks, the outer wall will be filled with nitrogen. A hitman is also blocked.

The mixture introduced between the two walls has a low density, for example between 1 and t5.

The load and tensile stress acting on the metal plate are small, and the load and tensile stress acting on the metal plate are small. wall thickness to resist the resulting pressures and temperatures? There is no need to increase it.

The insertion method is particularly simple and does not require extensive heating. The amount of donations that can be made by asking for heat is relatively high. Only at low temperatures, from Oo to 10°C.

As an example of variable temperature, the intermediate layer can be omitted, but the method of the present invention can be carried out under the same conditions. It is done by case.

A-'INEXτO2rmi=ENGNTER,'JP,TZONP,LS'E;2C ERE? OR Ding CN: NTEP! +ATIONAL A? ! 'LICATiON No? C? /Ysu 13sOOO1o (SA 8727)

Claims (1)

[Claims] 1. A first wall (1) made of a welded metal plate and a second A second wall (4) made of a metal plate is provided parallel to the outside of the first wall, and both walls are connected to each other. The filling material (6) is filled into the space (5) formed by the filling material (6). The material is based on metal or light alloy particles embedded in a thermosetting resin-based binder. An outer shell for equipment such as a Cowper hot air stove, characterized by a 2. In the outer shell according to claim 1. The filling material is mainly aluminum. an outer shell characterized in that it consists of aluminum or aluminum-based alloy grains; 3. In the outer shell according to claim 1 or 2, the size of the metal particles is approximately It is characterized by being between 0.2 and 2 mm, preferably between 0.5 and 1.5 mm. outer shell. 4. A method for constructing an outer shell according to any one of claims 1 to 3. and lined with a second outer metal plate wall (4) arranged parallel to the inner metal plate wall (1). and when the second wall forms a space (5) with the first wall, said space A filling material consisting of metal or light alloy particles and a thermosetting resin-based binder. (6) A person who constitutes the outer shell of a device such as a Cowper hot-blast stove, which is characterized by being filled with Law. 5. In the method according to claim 4, the additive metal particles and the resin-based binder are A method characterized by premixing. 6. The method according to claim 4 or 5, wherein the filling material is heated at room temperature or A method characterized by insertion at a slightly elevated temperature. 7. The method according to any one of claims 4 to 6, wherein the empty A method characterized by vibrating the outer shell when filling the container. 8. It is characterized by having an outer shell according to any one of claims 1 to 3. A device such as a Cowper hot air stove.