JPS5945975A - Thermal throw-in baking repairment material - 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 The present invention relates to a top-bottom blowing converter, a converter charging side wall, a tapping side wall, a bottom-blowing converter, a top-blowing converter, an FF1III port for a converter, a converter hearth, an electric furnace, and a steelmaking furnace. Furnace, AODXR) 1, DH, mixed pig iron car, mixed washing furnace, pot, melting furnace, the special a smelting furnace rumored to have a tilting of the furnace [according to the sleeve 1tI ffjIP) ``Inner lining refractory of parts that can be leveled This article relates to hot-throwing burn-out sleeve repair H that can be used as an immersion method when repairing furnace materials.

In recent years, due to the demand for improved quality of steel products, the number of furnaces has increased and high-temperature blowing has been required in the steelmaking process, resulting in localized melting of top-bottom blowing converters, mixed pig iron 11/2, lining of single-fired furnaces such as pots, etc. This will reduce durability. Therefore, as a countermeasure to this problem, during the operation of steelmaking, a repair pit is thrown into the locally melted part of the lining surface 1 furnace paulownia under a hot atmosphere temperature of 200 to 10 oo Celsius, and then it is attached. We are working to extend the life of the refractory lining materials by repairing the materials.

Various types of repair materials for yuzu have been studied in the past, and in particular, Meishin Ken 6 Earth has been added to the repair material Pi:7 Tar. In other words, coal tar and pitch are the most common binders used for repairing secondary tusks, but when heated with molten lead 1 during use, this binder produces very little smoke and a foul odor, and has a strong caustic property. In addition to significantly deteriorating the Sakuzoku-bu border due to the production of benzene, there is also the risk that it will be emitted into the atmosphere from chimneys, etc., and the next time it will affect the environment around the factory, causing pollution problems. In addition, since coal tar contains physical properties that are harmful to the human body, it also causes work and life problems when manufacturing repair materials. In addition, it is necessary to add plasticity to the repair material so that it can be thrown into the locally damaged area, but if coal tar or pitch is used as a binder, creosote oil, anthracene oil, or processed tar containing these should be added. It is used as a solvent to impart plasticity to the auxiliary material, and in this case, the toxicity of the solvent doubles as well. Therefore, cedar fat such as phenolic resin has been used in various ways, but due to the fast curing time of phenolic resin, hot fluidity rapidly decreases and local melting occurs. Sleeve 11' = J IJ is not properly filled into the narrow gap of the damaged area, and moreover, phenolic resin etc. quickly carbonize due to heating with molten copper during use, and the 111 in the resin
There was a problem in that the repaired paulownia wood was separated from the inner lining 1 furnace material due to the gasification of the volatiles due to the z emissions being trapped in the carbide of the Sode 1ji material.

In view of the above points, the present invention is non-tar-based, does not emit smoke or bad odor, and has excellent adhesion to lining paulownia wood.
Spraying equipment 1 has less z and is better than general spraying repair.
The purpose of the present invention is to provide a hot immersion baking repaired paulownia which can be used for injection without the need for a compressor, a gun for spraying, a nozzle for spraying, etc. attached to °l. It is something.

That is, tree number 11 is a product obtained by acid decomposition of cymenshido[]bevel oshishito is cymenshihydrobeluo+cyto or ithis(shidoDperio+diisoprohyel)be':,/zeshi. The purpose of this article has been achieved by means of a hot-throwing baking repair material characterized by a mixture of an aromatic solvent that dissolves reel and molded pot residue, and refractory aggregate. Detailed description of the invention.

Kibatsu 1. J] Supplementary (As a binder for lumber, V Jfj % of phenol produced by the cumene method is used. fc is used for the production of reel produced by the cymene method. The moxibustion residue produced as a by-product is used for the production of doroninone by the diisodurohirbenzei method. In other words, in the production of phenol using the cumene process, the target substance phenol and acetone are produced by acid decomposition of cumene, dropel, and acetophenone, 1 α-methylstyrene oligomer, and 3. phenol, dimethylphenylcarbinol, and solid resinous substances are produced as by-products, but the by-products remaining after phenol and acetone are removed by 1A distillation are used as binders.In this case, the by-products are Of these, the solid resinous material mainly performs the pinter action of the repair H of the present invention, and if there are many other components other than the solid resinous material among the by-products, the pot residue will be in a liquid state and will be cooled with a net. Therefore, it is often used in solid form, but it is also possible to use this liquid form.Also, when producing lenol using the cymen method, the target substance can be obtained by acid decomposition of cymen hydroxide. In addition to certain furenol and acetone, methyl acytophenone, isopropylphenol, isotuzylbenzylal]-ol and solid resinous substances are produced as by-products, but after the lysinol and acetone are removed by distillation. This secondary by-product is used as a binder.
By acid decomposition of pyrubenzene, the target product r1 is produced in addition to doronone, isoprobenylphenol. , 4-shidro+diacetophenone, 4-
Shido0shidimethylbenzyl alcohol and 11!11
1 彪 41'Ibabushimono is generated as a Hatake 11 creature,
This by-product that remains after steaming and removing the (Sido D+No) is used as Pai and Ter.

All the leftovers obtained from the above-mentioned pots are black m-quality resin residues with a softening point of 40 to 130°C and a molecular weight of 9.
2,000 to 5 for polymolecular substances ranging from 4 to 560,000
0,000 molecular weight or more, and contain phenyl groups with phenolic hydroxyl groups such as phenol, Fresol and their derivatives, low molecular weight phenolic resins, and polymers. It has curability when mixed with a phenol curing agent such as methicinetetratriline and heated, and has an oxygen content of 5 to 15 parts. This pot residue can be used alone, but depending on the method and purpose of use, phenols (such as phenol, Freyl, and their isomers, etc.) or lower alkyl tier phenols may be used. It can also be used by reacting with phenol resin, formaldehyde, etc., by melt-mixing with phenol resin, etc., or by mixing with a hardening agent for phenol such as phenol resin, etc. It can also be used.

A noteworthy point of the above pot residue is that it contains a large amount of C component as the θtl structure of carbon that is incinerated by firing 11V1! +I K included,
Contains a large amount of carbon to improve wettability with molten copper11
The reason is that the adhesion between Inner 1 and the refractory furnace material blended in 1 is poor.

Therefore, it is possible to obtain a single-type hot repair material by using the kettle residue as a binder, but when Netsu IIJJ Sodori is used for casting, it is necessary to impart plasticity to Sode 1 Shiratori. There is a curvature, and by mixing the pot residue dissolved in a solvent with the refractory bone phase, the supplementary 1ω material is made into a clay-like material. ”The leftovers from the second kettle are the usual 1(
) The present invention is also characterized in that it shows no solubility in the χ solvent and uses M7 as a solvent for pot residue. In other words, final completion 1
On the moon, it was discovered that the above-mentioned pot residue could be dissolved in an aromatic solvent in which an alkyl group was added to benzene. The phenyl, piphenyl, and triphenyl series having the following are mainly preferred, and those having 1 to 3 carbon atoms after the alkyl group are preferred.These aromatic,
Others include acetoshi, silane, and chlorine, but for disaster prevention purposes, those with a flash point of 70°C or higher are examples. The blending ratio of the aromatic solvent and the pot residue is 20 to 50 Kt of the former.
%, the latter is preferably 80 to 50% by weight. The amount of the mixture of the pot residue and the aromatic solvent used in the repair material is usually 3 to 25%, although it varies greatly depending on the intended use and mode of use. If the amount of aromatic solvent is too small, it will not be possible to give the repair material the plasticity needed for injection, and on the other hand, if there is too much aromatic solvent, the fluidity will become too large, leading to melting around the periphery of the refractory lining material. Since there is a risk that the repair material will flow out from the area to other places, making it impossible to carry out effective repairs, the aromatic solvent should be selected appropriately depending on the purpose of blotting, the mode of use, etc.

As fireproof aggregate, MgO1Mg0-C brick waste, MgO
+ CaO1At, 03-8 i 02 and other domites can be used.

During the steelmaking process, the Sodedaya paulownia obtained as described above is used to repair the refractory lining materials of top-bottom blowing furnaces, electric furnaces, AODs, mixed iron Mf, pots, melting furnaces, etc. During the period from when the molten copper is discharged to when the molten steel is introduced (in other words, during the hot period), the repair part of the refractory furnace material, which includes the sleeve 1 phase, is repaired. That is, the repair material is packaged in a resin bag such as a plastic bag or rolled into a spherical shape, and then placed in a furnace in a sub-temperature atmosphere of 150 to 1200°C. If you throw it into the lining and place +1 here, the supplementary f1 material will flow and fill the local melted area and the narrow gap in this place, and it will completely harden in about 5 to 30 minutes and add +1 to the lining refractory furnace material. At the same time, as the pot residue is carbonized, the lining refractory furnace 4', 4K adhesive is bonded with the refractory bone phase in the sleeve 44 material bonded by the carbide matrix. Here, the pot residue is a phenolic polymolecular substance ff111 containing phenolic monomers, low molecular weight phenolic resins, high molecular weight phenolic resins, etc.
During firing with molten steel, the carbonization of polymer M1 in the pot residue progresses quickly, and the hardening carbonization of low molecular weight molecules progresses slowly, resulting in the pot residue being carbonized too quickly or carbonized too slowly. Unlike when phenolic resin is used as a binder, carbonization occurs too quickly and the volatile matter is trapped inside the repair material, causing the volatile gas to expand and peel off from the refractory lining material. There is no such fear, and the repair material can be adhered to the lining refractory furnace material in a good manner. In addition, as mentioned above, since the pot residue contains a large amount of carbon precursors, it has particularly good adhesion to the refractory lining material (for example, Mg0-C brick) that contains carbon in multiple phases. In addition, since a large amount of carbon remains after the repair material is fired, the corrosion resistance against molten steel can also be improved.

In addition, when using the repair material according to the present invention, it is also possible to use the repair material in the form of a sheet and affixing it to the melt-damaged location of the refractory lining furnace material.

As mentioned above, the main departure') 4 K hri de U, kumenshi) 2
“0 peruoshito or kumenshido 0 beruo+shitomata V1
The residue obtained by distilling and removing phenol, 1, 1, 2, and acetone from the product obtained by the acid decomposition of 1,000 sulfur benzene (114 Because it is a binder of ``]--there is no smoke or bad odor like when using tar or pitch, and it has a better adhesion than when using coal tar, pitch, or phenolic resin carp as a binder. Hot repair materials can be bonded with high adhesiveness. Moreover, since it contains an aromatic solvent that dissolves the pot residue, it is possible to impart plasticity to the repair material, and the repair material can be used by attaching it to the refractory lining material in a drop-in manner. This method does not require the same equipment as when using repair materials.

Next, the present invention will be specifically explained with reference to Examples.

<Example 1> 9 was charged into a reaction pot with 1000 of the pot residue, which is a by-product (softening point: 30°C) generated when phenol was synthesized by acid decomposition of cumene, and 700 mmHg V.
C. Raise the temperature to 200N without reducing the pressure and perform a vacuum test. The obtained heavy resinous material was a blackish brown solid resin with a softening point Vi of 90°C. In addition, this solid resin has an oxygen content of 5.7 kg, and a molecular weight of 94 to 56 by GPc measurement.
2,000 to 500 for polymolecular substances in the range of 0,000
The one with a molecular weight of 00 was 85 yen.

70 parts by weight of this solid pot residue was mixed with t parts of noethyl and dissolved, and the Visitor was kneaded according to the formulation shown in Table 1 to obtain a repair material.

<Example 2> To the mixture of the solid kettle residue and t-noethyl diphenyl in Example 1, H. menareshitetra-sanshi was further blended as a hardening agent, and this binder was kneaded according to the proportions shown in Table 1 to form Sleeve 1. Obtained a shrine.

<Example 3> 1000 Kf of the pot residue, which is a by-product generated during the acid decomposition of Cymenic acid-decomposed Dropero + Cyto, was charged to fi Omei, and 700 ma Hg K > t I
(The resin was heated to 200° C. while heating to perform shrinkage. N et al.) The 00T resin was a dark brown M-type resin with a softening point of 85° C. The solid resin of Ushioctopus has an oxygen content of 111. is 5.7-di Q % and the molecule i1t is 9
A polymolecular substance in the range of 4 to 560,000
00~5000 o no j) F ship's 80 weight - 111
%. 30 parts by weight of this solid resin 701 (T-nyl, 7j parts to 7j parts) was mixed and dissolved, and this pie:7ter was kneaded according to the formulation shown in Table 1 to obtain Sode Ajigiri.

<Example 4> 1000 Kf of the pot residue, which is a by-product generated when synthesizing Shitrojuno'J by oxidizing His(Sidrobeluo+DiisojoH)benze:7, was charged into an rX reaction pot, and 700 Kf After reducing the HgK pressure, the reactor was heated to 200°C for 4 hours to carry out limited vacuum compression. The resulting solid resin material was a blackish brown solid resin with a softening point of 80°C.
11 contains 15 folds of iron and has a molecular AtF of 94 to 5.
60,000 in the range of 2,000~
It contains 75 times of molecular weight of 500,000. 1 part of 70 parts of this solid resin is mixed with 30 parts of 7-noethylpiphenyl and dissolved.
7 tons of repair material was obtained by mixing the tar with the following mixture.

<Comparative example> Coal pitch 6: creosote oil 4/6 as binder
A complementary paulownia was obtained in the same manner as in the example except that /4 tar was used.

Regarding the repair H obtained in Examples 1 to 4 and the comparative example above, 1
The presence or absence of smoke generation during rapid heating at 000°C and the physical properties at this time were measured, and the physical properties when heated at 150°C for 1 hour were also measured. The results are shown in Table 1.

Table 1 (Formulation L11 is heavy hj part) From the results in Table 1, none of the examples produced smoke.
Strength again? It is confirmed that the tissue blood has properties that are comparable or better than those of the tar-based comparative example of the example. Furthermore, as in Example 2, by using H+sameethylenetetratrines in combination, it becomes possible to cure under the conditions of 150°C x 1 hour, which is impossible with tar-based pipettes (JMm be done.

Next, the repair materials in Example 1.2 and Comparative Example were
Table 2 shows the results when the holes were baked on the charging side of a ton converter.

Table 2 As shown in Table 2, there was almost no smoke in the example, and the number of applications was the same or higher than that of the tar-based comparative example.

Agent Patent Attorney Ishi Ro1 Choshichi

Claims (1)

[Scope of Claims] (+) Phenol, Freyl 1, from the product obtained by acid decomposition of benzene The pot residue obtained by distilling off the residue and acetone, an aromatic solvent in which an alkyl group is induced to be added to the benzene ring and dissolves the solid pot residue, and a refractory aggregate are mixed. (2) The hot-throwing baking repair material according to claim 1, characterized in that it is formulated in combination with a curing agent for phenolic resin and is made of FC kettle residue. Hot-throwing baking repair material. (3) The hot-throwing baking repair system described in item 1 or item 2 of the patent RILFF, which is characterized in that the aromatic solvent is a piphenyl-conductor. . (n = 1, 2.; = f =) The hot thrown paulownia repaired by burning according to claim 3, characterized in that: (n = 1, 2.; = f =).