JPS60235772A - Heat-sofening amorphous 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 (Fields of application of 9-1-) This product is particularly applicable to tap runners, ladles, tank pushers, soaking furnaces, heating 1. r'+ ij: Heating softening used for lining railway cars and vacuum degassing equipment immersion tubes, etc. l A. This applies to fixed-shaped refractories.

(If Tokyo Techniques) From irY to molten metal container or kiln lJ for monk's raininota) 1 night 1 large 1 k is +7+<jf8 Gentle to give an appropriate flow f1 -C service -1. Uf-nta ladle ζ
This contains a considerable amount of water. 1. Before starting the kiln, high-temperature heating and drying was necessary, so a lot of heat was required for blue-(- and l).In addition,
During the heating and drying process, cracks and peeling may occur.

- Zogo C1 A shaped refractory using C tar pinch as a binder without using water was developed. However, this
+13th11 Large items have multiple additions of tar and hitch, and when heated, they cause environmental health problems such as smoke, gas, and π9, which can cause environmental health problems. Ta.

In addition, powdered or liquid) J, standard size 11 large size products made by bindering nol resin are disclosed in Japanese Patent Application Laid-Open No. 58-110473.
No. 57-1110174-U, however, the use of powdered phenolic resin caused problems such as dust generation during charging and poor filling performance as a shaped refractory.

In addition, when using liquid phenolic resin, it is necessary to add a suspension to develop heat softening properties, and if the Φ is not added, the monolithic refractory will become lumpy, making it difficult to fill thin areas during construction projects. The problem was that it was difficult.

(Structure/Operation/Effects of the Invention) In order to advantageously solve the above-mentioned problems, the inventors of the present invention have carried out various studies and studies to solve the above-mentioned problems. By using phenolic resin ζJ and pitch powder within a specific range,
No need to add water and mix, no dust, fr! J, f'1 size, high strength, A, regular age 1 large size product.

Zunawa l), Fireproof JJ $470~! 3t) weight% and particles 9tO, granular phenolic resin of 1 mm or more 5 to 15
weight%, liquid phenol resin 0.5 to 5 weight 41%,
It is a heat-softening monolithic refractory consisting of 1 to 10% of a pinch.

The refractory 1-11 used in the present invention depends on the type of furnace and the location of use, and may be made of acidic or resistant materials such as aluminum-J or silica, or one or two rods of carbide, nitride, or maknesia tolomite. It is a mixture of more than one species. That l!
If 70 to 90% by weight of compound 9 is used, if it is less than 70% by weight, the amount of phenolic resin added is large, and the excess amount will be added to the refractory material during thermal softening and flow. This leads to a uniformity of the structure due to the separation phenomenon. If it exceeds 90 times, add phenol resin and pitch powder or not.
However, the heat-softening filling property deteriorates, making construction difficult.

The granular phenolic resin added to the above refractory material has a softening temperature of less than 0.1°F, preferably 60x
:Hereinafter, -1-uniform molecular weight 500 or more is a noholanc type phenolic resin. Even at the same temperature, the viscosity is too high and the fluidity of the refractory material cannot be obtained.

The reason for setting O,lon to -1 is that if the value is less than this, the surface (n) is too large to obtain the same heat softening property, resulting in high bulk, poor powder filling properties when adding IA material, and heat softening. This is because the fluidity is not sufficient and the tissue becomes partially porous.

If the additive amount is set to 5 to 15% by volume, a large amount of pitch powder will be used for heat softening filling, which will worsen the industrial environment. If it exceeds 15% by weight, the effect of adding it as a condyle f◇-shaped fluorol resin will be weak, and on the contrary! Increase the pores in the Il region.

It is noted that granular ``noe 7 nor resin with a bay shape] J norle resin +11 is used for granular phenol resin, and pitch powder is used when adding material 1 and n! This is because the generation of dust from the powder mixture 11 is unavoidable. Generally speaking, it is possible to add a φ shaped body to the dust prevention 11 to moisten the powder.

Example λ(,t) When moistened with water, kerosene, kerosene, small oil, etc., the effect of preventing dust generation is recognized, but the assembled fibers become porous after being heated and softened and flowed, which is not preferable.

In the case of other ζJ)'-ru and ton-type products, the granular novolac resin will dissolve and the powdered product during manufacture will become lumpy and difficult to use.S.

Seiaki phenol resin can be used in both novolac type and resol type. If you want to promote thermal softening fluidity, use the novolac type, and if you want to cure at 300°C or less or if formalization is required, use the resol type.
It is recommended to add a curing agent such as hexamine to the novolak type.

When using 0.5 to 5% by weight of the above-mentioned shaped buenol resin, if the amount is less than 0.5% by weight, the effect of preventing dust generation is small;
If it exceeds 5% by weight, the material will become lumpy and workability will be low.
do.

The pitch powder may be any of the following types: 1) charcoal-based 1 petroleum-based
By adding 10% by weight, the carbonization yield improved. Since it has a low viscosity region over a wide temperature range, it promotes thermal softening.

If it is less than 1% by weight, the carbonization yield of the phenol resin will be insufficiently improved, and the fracture strength cannot be expected to be improved.

If the fire exceeds 10 times, it will generate dust that will cause environmental pollution and adverse effects on the human body.
C, BaC, etc. are added.

As described above, since the present invention is non-aqueous, tumbling is used to evaporate water, and it is possible to construct a uniform lining, and the bond between particles is strong and the adhesive force is strong. . In addition, we aim to increase the carbonization yield and improve the quality, as well as improve the flow rate.
I got 5 'l's.

Furthermore, the quality of the constructed body is not degraded and there is no dust generation or lumpy phenomenon. I was able to do it.

Example 1 1.71! ! Adjusted high al≧suI! ;! Let tl be the bone H, and add each resin to the bone H.
j4111j: The mixture of 10 types 1 (1) was investigated.

, 1' rjwa F,, n'l notation inclusion 1"lwol +, 1
(l
) He took it out to a government official, looked at it from the gold frame, and found out that he had no interest in it;

Lee's l'i'J! , as shown in Table 2, the invention example N111
1 to 4 come to Comparative Examples Nos. 5 to 8 and tjjIN +
The porosity was lower than that of 1 to 10, and the J-line strength was improved.

The curing speed was determined by filling the metal frame with each compound and
It was placed in a drying oven at 0° C. and taken out after 2 and 5 hours to confirm whether or not it had hardened. 2 hours later, misfire +1
JI Example No: Only 3 was cured, and all of them were cured after 5 hours.

In addition, when kneading the blend, inventive examples N()1 to 4. Comparative examples N07 to S3 and υi+ to Song 1 + - + l O
No dust was generated in Comparative Examples Nos. 5 and 6 and Conventional Example N1191.

The wind condition in the formulation was that of Comparative Example No. 07. Conventional 1I7IIN
This happened.

Table 1 Mixing ratio Table 2 Test results Song O marks are cured ones X marks are uncured ones No. 1 to 5 at the proportions shown in Table 3. No? , No. 8 and No. 010 were each filled into a metal frame of 100 x 100 x 100 as, and after hardening in a drying oven in a 300° C. atmosphere for 5 hours, the physical properties were measured.

Corrosion resistance was determined by laminating a rotary tram L using eight types of samples Nos. 1 to 5, comparative examples of the present invention examples Nos. 7 and 8, and conventional example No. 10, using blast furnace slag as the corrosive agent,
The erosion agent was replaced in 1.5 hours at 550° C. or lower, and rotary erosion was performed for 6 hours. The melting damage dimension was expressed as an index when Comparative Example No. 7 was set as 100. As is clear from Table 4, the inventive example is 20 to 40% lower than the comparative example and the conventional example.
A direction of 1% was observed.

The porosity and zero bending strength were measured according to JIS, and the porosity of the inventive example was lower than that of the comparative example and the conventional example, and the bending strength was significantly higher than that of the comparative example and the conventional example.

Example; 3 V14No. of the present invention in which Madanena in Table 3 was used as bone 1.
6 and Comparative Example No. 09 and 1 and Next Example No. 11 were laminated on a rotating drum, and the steel and converter slag were removed in a ratio of 2:1 and replaced with a new eroding agent after 30 minutes at 1650°C. , rotary erosion for 6 hours] Erosion loss: Expressed as an index using Comparative Example No. 9 as 100 using Method 1. As is clear from Table 4, No. 6 of the present invention example is the comparative example N (l D
Reach? ,F? The corrosion resistance was improved to a grade of 9 compared to Y Example No. 11. Furthermore, the porosity was lowered and the bending strength was improved.

Table 3: Formulation 7. Ratio (%) 4th person - (test results)

Claims (1)

[Claims] Fireproof +4 material 70~≦] 0 wt%, 5-15 tn% of Tn granular phenolic resin with particle size of 0.1 mm or more, 0.5-5 wt% of liquid engineered phenol resin, and 1-10 ton of pitch powder. A heat-softening monolithic refractory consisting of 1,000 tonne percent.