JPS5954660A - Manufacture of non-baked refractories - 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 This invention relates to a method for producing refractories.

Continuous furnace,
t Nozzle labor - Its operating conditions are harsh and surface 1 corrosion f1. There is a demand for something that has both spalling resistance and the most important type of non-burning surface that uses resin as a binder has this property. It has a better fruit and product performance than Eve's haze. This is an unfired refractory made by mixing refractory aggregate with a thermosetting resin pipe, press-molding it, and then hardening and drying the thermosetting resin in a heated oven. When the molten metal is used in an actual furnace, the molten metal; f
;+Calcination with vortex, residual carbon of thermosetting resin Q] Coke formation is also ρ. However, in the process of baking the thermosetting resin into coke, some of the carbon components of the thermosetting resin and other [components are H20, CCh
1CO, etc. were extracted from the refractory (111 slag was taken out,
to this,! : A large object will shrink, causing horizontal cracks in the nozzle, peeling at the top end, and loosening of the set.
The risk of an accident occurring was greater than any other vehicle.

Tree inventor!・In order to reduce the dust collection i that occurs when this unfired refractory is fired with molten metal and turned into coke,
First, when heating, normal hardening and drying (sufficient shrinkage and mixing in advance), J'li'' when fired with molten metal.
We found that reducing the 'tf&''''j,Q''ill component is effective in reducing the ill component.2. unexploded! ! This is what I came up with in 1.
− , □′.

However, in order to infiltrate the C1 refractory bone phase to improve the multi-phase property and formability during press molding, f: times, 1 thermosetting property 6 iT with water or solvent: etc., humidity ■
Dissolved in agent or dispersed in lying state □, face J fire, bone:
Rl is combined with Hayashi, but it has not yet been released. Lower the IJl and remember it in a coffin of fire? ! +ij f(“
; 1□ Agent formulation 1 pack I"ff: Thick intersect and reduced thermosetting resin blend In Ic available 1. Moist small "1 agent with a lot of compound 111 when hardened by heating and completely steered By evaporating this l! ! it K: 10l)
Pre-pack 11 pieces of refractory (11 pieces), use this cut-out refractory in a blowing iron, and melt it. Was there less combination +s+?
l)Qte(☆(1・11 dispersion 1tl I component in layer)i
The shrinkage of the refractory at this time can be reduced because the amount of refractory is small compared to the total height of the refractory. , it was about 10 to 15% by weight.In the case of heathering, when the amount of barrier agent added was 20% or more by weight of thermosetting resin, curing resin, etc. 15] will be explained in detail below.

It becomes a binder for compositions for fired refractories. '
! i! ! As the curable resin, it is possible to use thermosetting resins in general, but phenol resins of the cynol type, novolac type, or furan resins are mainly used because of their high residual carbon content. This thermosetting resin is used as a binder by dissolving or dispersing it in a wetting agent such as a solvent or water, and a wetting agent of 20% or more by weight or 9iF is added to the thermosetting resin. Binter 2 eggplant□. If the blending amount is less than 20 weights, the effect of completely preventing the shrinkage of unburned refractory camphorwood IJ: 191 cannot be expected. Combination of sweet wetting agent (upper limit of 11 - although not particularly limited, 7'0 weight 11.1% culm ml is suitable. More thermosetting 4N fat is dispersed and 1 in 4 When the blended fat content JS F decreases, the binder effect of the resin is not sufficiently exhibited and the strength of the unfired refractory □ is significantly reduced.

Then, add 1 liter of bath additive mixture to the resin f.
tl completely lowers the strength of unfired refractories f (11-ma 4: L < tends to cause thermosetting! In addition, as I''・'i agents, water, which does not affect the curing reaction of heat curing or f You can also use furir alfur, other ethanol, methanol q', and heat it! There are some reeds that can be used as they are as a wetting agent.
To mix with fire 't't f4 (koyori unfired',
f! ), but 101
As 1 fire and 7 light, commonly used ones can be used. Examples include Goba, Shirika (crystal t1, unspecified) arsenic lees), waxite, clay, shiset, baked stone, clay shale, synthetic mullite, kyanite, shineel, sintered alumina, zircon, zir] Nia, matanesia, chromite, carbon (amorphous carbon 1. crystalline phosphorous graphite), S
LC,,5t3N B, C.

etc., non-oxides, etc. In addition, in order to prevent a decrease in the strength of the refractory in the intermediate temperature range, a silane coupling agent or a low melting point metal may be further blended.6 The silane cutting agent is an organic functional type silane cutting agent. It has a reactive group of. One reactive group is usually 00
silanol, alkoxy group, and acetyl group, which are hydrolyzed to form silanol (SL(OH)a) and condensed with the OH group of the water adhering to the surface of glass moth and metal oxide, which are fireproof aggregates. and join. The other reactive group is usually a vinyl group, a metafluoride group, an amino group, an epoxy group, etc., and reacts with and bonds with the binder. Therefore, the silane coupler agent can bind the binder and the surface 1 fire bone paulownia, and can prevent a decrease in the strength of the refractory in the intermediate temperature range. Examples of the ringing agent include γ-talicid U C3H65z (0CH3)3), N-β (aminoethyl) γ-aminozurohiltrimethyldisilane (H2N
C2H4NI C3Hr, Si, (OCHI)3
), N-β (aminoethyl) γ-aminozu0hirumethyldimekatsushishishishishishishi (I (□N CI!H4NHC3
H (l S B (OCH3) 2 ), γ-A (OC
You can play Kokichi using 2H6)3 etc. In addition, low melting point gold 1
4'! ＋Hshi-C can be made of metal aluminum or zinc/aluminum magnesium alloy, which is then melted to cover the carbide surface ERY.
This has the effect of improving the strength in the intermediate temperature range of surface I fire special 1 (no), and also has the effect of improving surface J oxidation properties of U large objects.

Therefore, the set Ijk for unburnt refractories prepared as described in -1- is press-molded, but it is necessary to press-mold the set Ijk for unburnt refractories. The blending amount for the aggregate is the same as in the past: 80-98 weight for the aggregate and 20-2qI-Lll for the resin. Therefore, if the wetting agent in the resin binder in the conventional resin binder is 10 ply and the wetting agent in the resin binder is 20 ply - h), the unreleased JK
In some cases, the amount of wetting agent increases by 0.2 to 2% by weight and the amount of thermosetting resin decreases by 0.2 to 2% by weight based on the total weight of the composition. This composition is pressed and molded, and the molded product is further heated to about 200° C. to harden and dry the thermosetting resin. 14 of press molding
First, a solidified unfired refractory is obtained by heat drying and shaping with a wetting agent. Here, the wetting agent contained in the composition is volatilized during this heating drying, but
Since the wetting agent is contained in the refractory, at this point the refractory undergoes significant weight loss and volumetric shrinkage, and the porosity of the refractory increases due to the large amount of volatile components. Then like this? ! When used in an actual furnace, J = refractory l-L has a high τ11,1, due to the molten metal, heat fIIJ
The stacked carbon component of the thermosetting resin is fired and converted into a shoe, and the remaining carbon components, acid accumulating components, and hydrogen components in the thermosetting resin are H70, C02, CoQ? Express t1
↓However, since thermosetting resin is rarely used, this (11
(The loss 1.1 is also reduced, making it possible to keep the volumetric fat absorption of the refractory to a small value when it is turned into taraphite by the high temperature of the molten metal.)

As mentioned above, by volatilizing the wetting agent of undeveloped FJl [according to the amount of 14% during heat drying] (!:), a large amount of fat absorption is generated in advance, and moreover, it is possible to When fired with molten metal, the volatile matter Lll is suppressed to suppress the body sorption &i due to the volatile matter, thereby reducing the volumetric sorption ci at the use of the refractory material, preventing horizontal cracking and upper peeling of the refractory material. This prevents the set from coming loose.

In addition to the unexploited metals mentioned above, it is also useful in converters, electric furnaces, steelmaking furnaces, secondary refining furnaces, and pots.

Next, the unreleased IJIJ is given as an example according to the example.

fever b9! [Preparation of fat binder (I) Phenol 940y＼ 92 Chiparaformaldide 424
y, 630 y of water, and 7.5 y of lithium hydroxide were placed in a four-loop flask, and the temperature was raised to 70° C. for about 90 minutes. Leave the reaction for 180 minutes. After the reaction is complete, gradually release the mixture and reduce the pressure to 650 mm Hy and reduce the internal temperature to 75°C.
Dehydration was carried out under reduced pressure until it became .

The obtained sole-type phenolic resin was a brown liquid with a water content of 3%, an average molecular weight of 350, and a viscosity of 130 voids at 25°C.

To the thus obtained reel-type phenolic resin, 1 part of 111 parts of γ-tallyside disilane was added as a silane coupler, and the mixture was thoroughly mixed to remove residual carbon @ 53 parts of the resin binder ( I-(+l) was obtained. Ethyresidilyl was mixed at 25% by weight and 11% with this sweet potato to obtain a resin binder (I-[2]) with a residual carbon content of 42% by weight in a viscous Jul 20 tlX chair. Furthermore, by mixing 10% by weight of circulating water and 15% by weight of microwave recall, the viscosity was 18% and the residual carbon content was 42%!4.
Ij no. '' Thermosetting resin vigitator 1P A1!11 (ID phenol 940y192) Diformaldehyde 228
1/, 340y1 water, 1 acid f, 4 '5y 1. J Fran: ] K jfy, reflux for 60 minutes in a mold,
Oh no! Keio was performed for 150 minutes. After the reaction, tube 1
Dehydration was started at 1-1 and heated until the internal temperature reached □150°C.
The novolak type phenolic resin was a viscous liquid with a water content of 1.0%, an average molecular weight of 4" and 0, and a viscosity of 350 voids at 25°C. In this way, f(J=N-β(≠trinoethyl)γ
- Added 1 hour of -aminopropyl dorimet + silane and mixed well. ' □Mix 15T [1°1%] of Eziresilyl to this, then mix 15% of methylenetetratriane, and the remaining 11'? Charcoal 〃11157 weight JL, viscosity 1'20 voids (formerly binder (1,1'-410). Jinte □ Tiger Giant', 1 ” 5 '2g1',
It% mixed Nibun - viscosity 8 () Remaining in the whisk, distilled coal certain Qj
381"j Haruchi's (3"1 (fat binder (II-(2)
+)? iIta. difference? Add water as well to OTl'i'
, , il, attack, Tsurohiren, Krikor 30+
When mixed with ji and ji, the viscosity is 70 voices and the amount of residual carbon is 35
Heavy hIchi's tEj fat binder (,, 'Jr = +3
) ) was obtained.

” As shown in the second letter, t
11), i-+21, Any[3), 1.1- +1+,
II - (2+, u L +: n is 1 month, this is the 1st
By mixing the compositions shown in Table 1, Table 2 and Table 3, a set of fire-resistant material 1 is obtained. By heating for 4 hours to harden and dry, a large, unfired product was obtained.

In this way, t! 7.): The characteristics of the refractories were measured and the first. Section 1 shown in Tables, Tables 2 and 3, -
・Table 1 (Slide nozzle blade 1 used for bricks) Table 2 (Slide nozzle used for tuyere brick) Table 3 (Slide nozzle -E, "Fl + 1 talking brick K") Shigetsu 1 Looking at the residual expansion rates in Tables '1, '2, and Tables 3 above, it can be seen that the Mononoke sorption 1'1 of each comparative example is large and causes trouble, whereas It was found that the shrinkage of each of the Examples was almost non-existent or extremely small, and no trouble occurred.

Agent Patent Attorney Ishi III Cho 357

Claims (2)

[Claims] (1) When a thermosetting resin and a P lubricant are blended into the aggregate, the mixture of KtP lubricant is mixed with a thermosetting resin and a P lubricant.
0 weight 1j) Prepare a composition for refractories by setting the
This refractory composition is molded to form a thermosetting resin.
? 1. A method for producing unfired refractories, which is characterized in that after being heat-treated at +°C to evaporate a wetting agent, this one-shaped object is fired with molten metal in an actual furnace. (2) A thermosetting resin having an average molecular weight of 3.00 or more.The screw described in item 1, 11t, 1 face, 1 flammable jl! j: lk