JPS59203764A - Refractory brick and manufacture - 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] [! 31 Health field] [Background technology] In bricks for furnace materials, nozzles, etc. that come in contact with molten steel,
In order to minimize corrosion damage due to fgm and increase service life, bricks with low wettability to molten steel are desired, and carbonaceous bricks have conventionally been commonly used as such bricks. This carbon-based brick is made by blending carbon to reduce the resistance to molten steel, but since carbon powder has poor mixability with aggregate and binder, when a large amount of carbon powder is mixed in, it is necessary to In this case, it is necessary to use a large amount of solvent to improve the crosstalk of the carbon powder, and in this case, the porosity of the brick increases due to the volatilization of the finishing agent, which adversely affects the corrosion resistance of the G steel.
This will reduce abrasion resistance, and when a large amount of carbon powder is mixed in, the carposi powder will scatter and cause problems in the work environment. It can also make things worse. Therefore, in the past, there was a practical limit to the amount of carposi powder blended, at most 30%, and there was also a limit to the ability to improve corrosion resistance with carbon.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is possible to use a large amount of carbon powder without requiring a large amount of toner, and without causing a deterioration of the working environment. Fire-resistant bricks that can be mixed with steel and have excellent corrosion resistance, and their production? The purpose is to provide.

[Disclosure of the invention]

Therefore, the present invention provides a handout containing carbon pellets in which carbon powder is consolidated into pellets using a thermosetting resin as a binder, I#r large aggregate, and a thermosetting resin binder. A fireproof brick with all the characteristics of a specific invention, including carbon powder and hardening proofing resin? After kneading with a pressurized kneader, this kneaded material is pebbled and soluted with a granulator, and the carbon pellets are blended with large aggregates and thermosetting TfA fat binder and kneaded.
this? All of the above objectives have been achieved by making a combined invention a method for manufacturing durable bricks characterized by drying or firing after solidification, and the present invention will be described in detail below.

The present invention is characterized by the use of carbon powder as a carbon pellet, and the carbon pellet is made by solidifying carbon powder as a thermosetting resin. Outward purple pie of particles:, I coated it thinly with Iku, this ridge? Carposi powder books designed to introduce each other to each other? It solidifies. To explain the manufacturing process of such carbon fiber, first, carbon powder and thermosetting resin are used. Pressurization is applied every second, causing crosstalk. The carbon powder used ranges from scale-like powder to ultra-fine powder, short fiber-like powder, and is it natural or man-made? Can be used.

``Also, as the thermosetting resin, phenolic resin or furan resin of Novolac pear or Resole pear can be used.The thermosetting resin is used in a liquid state with water or a bamboo filtration agent added, and if necessary. Curing agent tJ& is used.

The blending agent 8- of carbon powder and thermosetting resin contains 50 to 99% by weight of carbon powder and 1 to 70% by weight of thermosetting resin.
It is preferable to set it within the range of weight %. 9 carbon powder books
If the thermosetting g exceeds 9w'WjL%, and the amount of Japanese oil exceeds 1wt, the mixture of the two will have little stickiness and granulation will be difficult, and when blending carbon pellets with government materials, etc. This method requires a large amount of water and solvent, which may cause the same problems as in the conventional method. If the carposi powder is 30 weights and the thermosetting resin is 70 weights or more, then this carbon pellet? The thermosetting (arsenic) resin is carbonized in the gap where the molded product kneaded with aggregate etc. is fired, but the vaporized components generated at this time increase the porosity of the fired bricks and may reduce their durability. Of course, this does not preclude the preparation of carbon pellets by using the mixing agent in combination with the mixing tank.
Plate (2) rotated within 1 (21k provided,
It is formed by installing a pressurizing lid (4) on the upper inlet (3) of the mixing tank (1), and the inlet (3) is opened by cutting the pressurizing lid (4). Due to the poor condition, carbon powder and thermosetting resin are put into the mixing tank 0) through the inlet (3), the pressurizing lid (4) is lowered completely, and the mixed material (carbon powder is removed using the pressurizing lid +41). Books and thermosetting resin)? Plate (2) (2) is rotated for 'e times while pressurizing and kneaded with the carbon powder and the thermosetting resin. Therefore, it is difficult to mix the wires with a large amount of carbon powder and blown resin using the energized wire crossing means, but in the pressurized kneader A, it is possible to mix the wires with a large amount of carbon powder and blown resin. In order to mix the wires while pressurizing, the forced wire action works strongly, making it possible to mix the carbon powder and thermosetting resin uniformly.
It becomes possible. The carbon powder obtained in this way and the thermosetting resin are combined into M] shown in Fig. 2.
Pelletize into ltB. Is the granulated dirt B in Figure 2 the hopper (5)? Enjoyable screw case (6)
, A straight screw (9) is provided with the help of the electric cutting machine through the box (8), and a cutting blade is provided on the outer periphery of the straight screw (9). Extract screw (101,
At the tip 814 of the screw case (6), the extract screw (101) is inspected with a wire mesh screen (11) that surrounds it. When put into the case (6), the contaminants are sent to the screen (11) 0 inner circumference 6 by the foot action of the straight screw (9). By extrusion action, the mixed material is forced out to a fine diameter through the mesh of the screen (11), and at the same time, the mixed material extruded by the action of the cutting blade is cut, and the kneaded material is formed into beads of a predetermined diameter. Here, the particle size of the carbon pellets made of carbon powder and a mixed material on the thermosetting resin is determined by the mesh size of the screen (Ill). By adjusting the size of the mesh, it is possible to obtain a pellet of any diameter.In [2, Ru4, Unexploded iJ], the diameter of the carbon pellet depends on the size of the carbon powder used. , usually 1 to 5 is preferred.

If it is less than 1 ma, the carbon powder used may be broken, which is not preferable, and if it exceeds 5 mxf, dispersion tends to be poor when carbon bed is mixed with aggregate or the like. Also, the length of the carphone compound/soto is usually preferably 30W, that is, 1 to 30 ms, based on its diameter. If it is larger than the knead, it will not be well dispersed with the filling material, etc., which will result in smearing. The shape of the carbon pellet is not particularly limited, and may be columnar, flaky, spherical, irregularly shaped, or any grain size. The carbon pellet made in this way does not evaporate the solvent in the Kumabako II fat vigitator, or can it be air-dried to remove this solvent? In addition, it is convenient to heat and harden l'A6 curable side fat.
Carbon powder book is used as hardenable column Tsukuwo binder.

1. It is in the form of a rhinoceros. 15 when performing heat curing
The treatment is preferably carried out under heating conditions of 0 to 200°C for 5 to 10 hours.

However, using the carbon pellets as described above, this? In addition to blending with human-resistant aggregates such as alumina, matanesia, mullite, and sand, we also blend thermosetting 41fl fat binder and core agent, and by mixing with this blend @ Murasaki Sanjusu, we can create a clay-like shape. Get material money. Here, as a thermosetting resin binder, is there novolak or reel type phenol Yoko 1 Minami or furan resin? It can be used, but it is convenient for molding carphone pellets, thermosetting g:, 8 + 1 resin and the same resin, ie, carphone powder as +M fat. If used, use formaldehyde such as enol stick fat. Resin used as a part of c-resin, or formalde resin 1~ and anti-white resin, such as furan resin, is used as thermosetting resin 1.
Umapai: Connectivity between 7ter and carbon? This is preferable because it can improve the performance. Further, as the solvent, for example, ethylene glycol can be used when a novolak type phenol resin is used as the thermosetting resin binder, and methanol or water can be used when a reel type phenol hINFik is used. The blending amount is preferably 10 to 95% by weight in terms of carbon pellet t carbon powder based on the total amount of blended components. At 10% by weight, the effect of carbon pellets cannot be obtained sufficiently, and since carbon pellets are granular, it is possible to incorporate nearly 100% by weight, but if it exceeds 95% by weight, the carbon pellets will not be sufficiently effective. The yield becomes too small, resulting in disadvantages in terms of physical properties. In addition, the amount of thermosetting resin binder is preferably about 0°5 to 6 tbsp when converted to the resin content when cut to the total amount of the blended components, and the blended weight of the cut-and-cut is 0% to the total amount of the blended components. The amount is preferably about .5 to 5% by direct weight. As for this solvent, when it is used in the form of a varnish, the bath agent in the binder serves as a wetting agent as it is, so there is no need to mix it separately. In addition, as a carpone left, the Baisita Yuzu IJ
l # k 2 + r 煕嫂 The special ingredients are mixed in a large amount,
The amount of thermosetting aIllIi8I binder resin can be reduced by one liter. Here, the carbon powder is added to the carphone pellets in the form of one round, so it has good kneading properties with the compound material and can be blended in large quantities. ``Also, there is no need to use large amounts of bath additives in order to improve mixing ability.The material obtained in the above manner is pressed into a brick shape, and then The thermosetting resin binder in the molded material is heated and dried at about 200 to 300°C.
It is made of unfired bricks that are hardened and durable.

This material is made by firing and carbonizing hardening materials in a furnace and making them into refractory bricks using carbon pounds. Furthermore, after the molded material is solidified at RT as described above, it can be fired into a sintered ink by firing it in an ambient atmosphere.

Next is obscurity? Preparation of 0 carbon pellets explained in terms of carrier according to the legend (I) 1st y-shaped graphite with 95% degree of graphitization applied to the pressurized kneader
Add 0 kg'f and further solidify; methanol solution based on 80 weight of β phenol resol resin? 15-m @% with external hook
The mixture was added, kneaded well, and dispensed.

Next, it was put into the granulator shown in Fig. 2 and extruded through a 3-diameter screen to granulate it into cylindrical pellets, which were air-dried to 7" to remove methanol.

Manufacture of 0-garboshi berets (b) In the same manner as in CI) above, the mixed material extruded from the granulator was cut into three fin lengths, and then rolled into a spherical shape and sized.
Pellets by air drying? Obtained.

. Manufacture of Carboppelle υt (l [l) Pellets air-dried according to the above (11) 7. Phenol reel in Beshit by heat treatment for 5 hours in a dryer set at 150°C. Shisazota.

The phenol reel stick fat in the pellets was hardened by heat-treating the dried pellets in a dryer set at 1150°C for 5 hours according to the method of production of bomberettes (1v) above. .

Production of 0 carbon pellets (V) Phosphorous graphite 5"9, A with a degree of graphitization of 96% in a pressurized kneader
l @ 03 5kgt of fused alumina powder with 98% silicate content
70% V of solid phenolic novolak resin
% methanol injection liquid applied externally to 15% by weight n1 as a hardening agent + sameethylene tetramine externally applied to 1.5
I added it to the mixture at the beginning, kneaded it well, and poured it out. Kon, Saiko (
The mixture was granulated using a granulator in the same manner as in 1) and air-dried to obtain pellets.

0 carpon pellets (VD) The mixture was granulated and pressed in the same manner as in (V) above, cut into lengths, t3IIJ, rolled into a spherical shape, sized, and air-dried to form pellets. ?Obtained.

Preparation of carbon pellets (Vl)
The phenol novolac in the pellets was heat-treated for 6 hours in a dryer heated to temperature 11. hardened.

Production of carphone pellets (Vil) The pellets were air-dried according to (■) above. The phenol novolac 41 in the pellets was cured by heating for 6 hours in a dryer set at 170°C.

Production of 0 carbon pellets (IXI: Pour 1 OKQ gold of phosphorous graphite with a degree of graphitization of 95% into a pressurized kneader, and then add solid phenol)-IL, 110 kg'iz of methanol containing 80% by weight of the resin,
After thoroughly kneading the mixture, it was taken out and pelletized using a powder mill in the same manner as in (1) above.

Production of carbon pellets (X) 4 kg of phosphorous graphite with a degree of graphitization of 98%, M
9"7 of matanesia flour 6 containing 98% gO was added, and 5ON'lli of solid phenolic resole paste and 1% methanol solution was added to the outside, mixed well, and then dispensed. The pellets were put into a granulator and collected through a 2H screen into pellets.

<Last 7 iip 5 Examples 1 to 10> ゛The mixture shown in Table 1'j is kneaded in a kneader to form a molding material? Obtained. Next is this solid material? Fill the mold,
9/cr for 1000! This molded product was dried at 60°C for 2 hours and then at 200''C for 5 hours to obtain an unfired brick.

<Ratio Softness 1'A+ 1-2> Unfired bricks having the formulations shown in Table 1 were obtained in the same manner as in Examples 1-10 above.

<Examples 11 to 20> ``A mixture of the formulations shown in Table 1 was mixed in a kneader to obtain a molding material Nr.Next, this molding material was kneaded into a gold pear, and
The molded product was molded at a pressure of 000 kg/C- for 2 hours at 760°C, and then dried at 200°C for 5 hours. Coat it with coke and 1
The deer was burned and harvested by JIL at 200°C with an opening at 5 o'clock.

<Ratio Examples 3-4
The fire was burned in the same manner as in 0, and Shiga was obtained.

(Hereinafter - white) -゛Brown Examples 1 to 10. Ratio Examples 1-2 and Examples 11-20,
Comparative Example 3 - The characteristics of Tokuyu bricks were measured in 1. The results of Examples 1 to 10 and comparative examples 1 to 2 are shown in Table 3, and the results of Examples 11 to 20 and comparative examples 5 to 2 are shown in Table 3. In addition, the hole resistance is 64 cubic samples 11
Heat it to 500℃ and let it cool. A cycle test of rapid cooling is conducted, and the number of times until cracking occurs is shown. The amount of erosion is shown as the amount of erosion during Φ time immersion during 1st trial melting of 30 mm φ x 60 u.

(Leaving space below) From the results in Tables 2 and 3 above, it can be seen that Tanio's example has lower apparent porosity and higher erosion resistance and strength than Comparative Example 2, which contains a lot of violet in the solvent, and Jin's example. This is confirmed.

〔Effect of the invention〕

As mentioned above, in the present invention, the carbon pellets are compounded in pelletized form as 2F thermosetting resin gold binder to obtain a durable brick assembly. N carphone powder mixed well with magnolia? Is there a large amount of Garpon powder compared to when directly distributing cans? It is easy to chew, and it is possible to increase the carbon content of large-durable bricks and improve the corrosion resistance against molten steel. And is it an environment where there is no problem with addends like when blending a large amount of carbon powder? There is no risk of deterioration, and there is no need to use a large amount of brood additive to improve crosstalk, unlike when a large amount of carbon powder is mixed. Since it can be blended in large amounts, it can reduce the porosity of the brick due to the volatilization of the bricks and prevent the deterioration of the corrosion resistance and abrasion resistance of IB steel. Furthermore, in the uninvented manufacturing method, carbon powder and a thermosetting resin are combined with 71 [
] After kneading with a pressure kneader, the kneaded product is pelletized by granulation, so the carbon powder and thermosetting resin, which are difficult to mix, are uniformly kneaded with a pressure kneader. It can be made into pellets using a granulator.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a pressure kneader, and FIG. 2 is a side sectional view of a granulator, where A is a pressure kneader and a Bid granulator. Agent Patent Attorney Ishi 1) Written amendment to the 7th procedure (spontaneous) 1 Indication of the case 1982 Patent WL No. 79705 2 Name of the invention Fireproof brick and its production properties 3 Person making the amendment Relationship with the case Patent Applicant 4 Agent postal code 530 5- Date of amendment order 6 Number of inventions to be increased by the amendment N/A 7 Specification subject to amendment 8 Trace correction of amendment content attached sheet Patent application number Patent application 1982- Insert the following full text next to "obtain." on line 13 of No. 79705 Specification No. 9. ``At this time, surface cutting can also be added. In other words, carbon pellets in the molding material, silane thread cups to improve the contact between the aggregate and resin binder, and to create a wetting effect. A linking agent or a titanium thread coupling agent can be added, and if the viscosity of the molding material is low, polyvinyl alcohol or CMC (
carboxylic dimethylcellulose) can be blended as a thickener. ” Agent Patent Attorney Ishi 1) End Seven

Claims (1)

[Scope of Claims] +1+ A composition containing carbon pellets in which carbon powder is consolidated into a helet shape using a thermosetting resin as pinter, human-resistant aggregate, and a thermosetting resin vigitator is collected. To be shaped and fit? Features of fireproof bricks. (2) Can carbon pellets be formed with 30-9% by weight carbon powder? A fireproof brick according to claim 1, characterized in that: 13) Is the amount of carbon pellets 10 to 95% by weight based on the total amount in terms of carbon powder? A refractory brick characterized by claim 1 or 2J. (4) Claim 1, 2, or 3, characterized in that the ampho-curing resins in Claim 1 are resins of the same type or mutually reactive. fireproof bricks. (5) After kneading the carbon powder and thermosetting resin in a fully pressurized kneader, this kneaded material is pelletized using a granulator, and this carbon powder is made into pellets. A method for producing fireproof bricks characterized by mixing and kneading large aggregates and thermosetting resin binder, shaping the mixture, and then drying or firing the mixture.