KR100398828B1 - Coating material of inorganic particle which forms projecting parts at the surface of refractories or metalcase - Google Patents

Abstract

The present invention is a coating agent for forming a protrusion for attachment to a counterpart on the surface of the refractory material or metal case, the coating agent increases the resistance when mixing the various types of refractory particles forming the protrusion and the refractory particles And various kinds of anti-oxidation additives for preventing the carbon from oxidizing at a high temperature, and the various kinds of refractory particles, carbon, and anti-oxidation additives are mixed and applied to the surface of the refractory material or metal case, and then It comprises an organic, inorganic binder to be bonded.

According to the present invention, by applying a spray or a brush to a metal case or carbon-containing fireproof material by spraying or applying a brush to form a protruding portion, it is possible to provide a refractory material having a higher slip resistance and a stronger bonding force.

Description

COATING MATERIAL OF INORGANIC PARTICLE WHICH FORMS PROJECTING PARTS AT THE SURFACE OF REFRACTORIES OR METALCASE}

The present invention relates to an inorganic particle coating agent for forming protrusions on a surface of a fireproof material or a metal case, and more particularly, to a surface of a metal case surrounding a fireproof material or a fireproof material to prevent sealing or falling off. It provides an inorganic particle coating agent to form a certain size of the refractory particles to protrude to form a strong bonding force to each other.

In general, a metal case is used in various ways, and is mainly attached to a tundish or ladle, and a bubbling plug for injecting inert gas into molten steel in the tundish or ladle, After sliding the nozzle in ladle and tundish to match the hole of upper and lower nozzles, the sliding nozzle which pushes molten steel and the upper and lower surfaces of the sliding nozzle are mounted on the sliding nozzle to reduce the frictional pressure and thermal shock. It is used by assembling with sliding plate.

In addition, the bubbling plug is a non-metallic inclusion in the molten steel by inert gas supplied through the porous hole when inert gas such as argon is injected into the refractory formed with a porous hole through a gas pool which is a gas injection hole. Separation, alloying of the second component of the molten steel, homogenization of the molten steel temperature can be achieved. In addition, the gaseous inert gas is used by casing the metal case to prevent the gas leaks between the gas pool and the porous hole.

Meanwhile, the metal case applied to a conventional bubbling plug is used after applying a refractory mortar on its outer circumferential surface and assembling it into a ladle or tundish structure.

However, since the surface of the metal case itself is metallic, the surface is slippery, so that the coating itself is difficult to apply when the refractory mortar is applied, and the uniformity of the coating is not possible.

In addition, a method for forming irregularities on the surface of the metal case has been devised in order to solve the above problems, it is currently impossible to achieve the purpose of the metal case manufacturing technology in the art.

In addition, the sliding nozzle is generally composed of an upper nozzle and a lower nozzle, and in the case of the upper nozzle, it is often used without casing a metal case.

In addition, since the upper nozzle itself is a refractory containing carbon, the surface is slippery.

When assembling the structure such as ladle or tundish for the above reason, refractory mortar should be applied to the surface of the upper nozzle like the bubbling plug and assembled with the structure, but it is difficult to apply due to the carbon contained in the refractory, Even though it is impossible to apply uniformly, the product is frequently damaged due to the ineligibility of worker handling during transportation such as transportation work, slippery and easily fall, causing a worker to be in a safety accident.

On the other hand, in the lower nozzle and the sliding plate made of the refractory, the metal case is used to be assembled to each other due to its characteristics.

In addition, in order to assemble the refractory material of the lower nozzle and the sliding plate and the metal case of the metal material, they are assembled together using a high-strength castable or a refractory mortar, but often fall off after use, even after use or after use. It is required that the attachment to the case be maintained at all times.

Accordingly, the present invention has been made to overcome the above-described problems, the object of the present invention is to prevent the slip by forming a predetermined protrusion by spraying or applying the coating agent according to the invention on the surface of the refractory itself, the surface of the metal case The present invention provides an inorganic particle coating agent to further strengthen the assembly of structures such as ladles and tundishes.

In addition, another object of the present invention to provide an inorganic particle coating agent to form a strong bonding force to prevent the falling off of the refractory and the metal case is generated by combining the refractory and the metal case in a weak strength.

Figure 1 (a) is a conventional bubbling plug, (b) is a bubbling plug is applied to the inorganic particle coating agent to form a protrusion on the surface of the fireproof material or metal case (Metalcase) of the present invention. Figure 2 (a) is a conventional sliding plate, (b) is a sliding plate to which the present invention is applied. Figure 3 (a) is the other refractory material without a conventional metal case, (b) is another refractory material without a metal case to which the present invention is applied. 4 is an embodiment in which the inorganic particle coating agent for forming a protrusion on the surface of the fireproof material and the metal case of the present invention is variously applied.

* Description of the symbols for the main parts of the drawings *

10: bubbling plug, 12: fireproof material, 14: metal case, 16: coating agent, 18: sliding plate, 20: other fireproof material

The present invention for achieving the above object relates to an inorganic particle coating agent for forming a protrusion on the surface of the refractory or metal case, in particular a coating agent for forming a protrusion for attachment to the counterpart on the surface of the refractory material or metal case. To

The coating agent includes a plurality of refractory particles forming protrusions, a plurality of carbons for increasing solvent resistance when mixing the refractory particles, a plurality of anti-oxidation additives for preventing the carbon from oxidizing at high temperatures, and Refractory particles, carbon, and anti-oxidation additives are mixed and applied to the surface of the refractory material or metal case, and comprises an organic and inorganic binder to be bonded to each other.

Figure 1 (a) is a conventional bubbling plug, (b) is a bubbling plug is applied to the inorganic particle coating agent to form a protrusion on the surface of the fireproof material or metal case (Metalcase) of the present invention. Figure 2 (a) is a conventional sliding plate, (b) is a sliding plate to which the present invention is applied. Figure 3 (a) is the other refractory material without a conventional metal case, (b) is another refractory material without a metal case to which the present invention is applied. 4 is an embodiment in which the inorganic particle coating agent for forming a protrusion on the surface of the fireproof material and the metal case of the present invention is variously applied.

First, Figure 1 (a) is a conventional bubbling plug, Figure 1 (b) is a refractory material as a bubbling plug 10 is assembled and bonded to the refractory material 12 and the metal case 14 to which the present invention is applied. (12) and the inorganic particle coating agent 16 according to the present invention on the surface or outer peripheral surface of the metal case 14 and then assembled together.

The composition of the inorganic particle coating agent according to the present invention is refractory particles, that is, mullite ( ㆍ ), Alumina ( ), Zirconia ( ), Magnesia ( ), Zircon ( ), Alumina-zirconia ( ㆍ ) Or a mixture of two or more of them.

In addition to the bubbling plug 10, the sliding plate 18 shown in FIG. 2 (b) and the coating agent 16 of the other refractory material 20 shown in FIG. 3 (b) are used as refractory particles.

In addition, the bubbling plug 10, the sliding plate 18, the other refractory material 20 is attached to a ladle or tundish.

However, the tundish uses refractory particles such as mullite and zircon having low fire resistance because the molten metal contained therein has a lower temperature than the ladle, and alumina, zirconia, Magnesia is used.

Such, the refractory particles have a different effect of forming the protruding portion depending on the size of the particles. That is, the higher the ratio of the particle size, the easier the formation of the protruding portion, but poor workability during coating, and lack of adhesion to other metals or refractory materials. On the contrary, if the ratio of the particle size is low, the formation of the protruding portion does not occur, so the ratio of the particle size should be appropriate.

In addition, a suitable particle size, for example, since the normal mortar applied to the bubbling plug 10 is applied to a thickness of 3-5mm, the maximum size of the coating particles mixed with the mortar to form the protruding portion is 2mm. In addition, in order to improve the workability and coating properties during the coating operation, the finely re-processed fine particles re-processed to 2.0mm-0.5㎛.

To this, carbon raw materials are added to improve the usability during use.

The carbon raw material (amorphous graphite such as graphite isocarbon black) is 0.2mm-0.5㎛ size of the particles.

In addition, the carbon raw material may be added to the carbon up to 10% according to the specifications applied, the problem caused by workability or oxidation when an excessive amount is added to the molten steel infiltration occurs, preferably only up to 10% Add.

In addition, an anti-oxidation additive for preventing oxidation of the refractory particles and carbon is added below 0.1 mm.

On the other hand, the organic and inorganic binder which joins the fireproof material 12 and the metal case 14 are used individually or in combination with each other.

The organic binder can be used for both noblock and resol type in phenol resin, and in the case of noblock, it is necessary to add a curing agent of hexamine, and the emulsified vinyl acetate is used after diluting by adding water to the stock solution.

However, when only organic binder is used, phenol resin and emulsified vinyl acetate should be used separately.

In addition, the inorganic binder is phosphoric acid and aluminum phosphate powder and an aqueous solution, that is, 30-65% solids, Is used at 7-17%, or sodium silicate and powder and aqueous solution, i.e. 19-60% Using 3-45%.

However, when applied, it should be applied separately like the organic binder. The reason is that when combined with each other, the problem of hardening rapidly occurs by mutual reaction.

Meanwhile, the refractory particles and the organic and inorganic binders are mixed in advance in the ratio as shown in Table 1 below, kneaded in an agitator, and then sprayed and applied by a spray or a brush.

In addition, the phenol resin and the inorganic binder in the mixture of the organic binder applied to the metal case and the refractory as described above is cured when kept at 80-120 ℃ for 12 hours or more.

In addition, the emulsified vinyl acetate applied to the metal case and the refractory can be cured even if it is left in the air.

The composition of the inorganic particle coating agent according to the present invention as described above is shown in Table 1.

Membership fee Membership granularity {Mullite ( ㆍ ), Alumina ( ),magnesia( ),zircon( Alumina-zirconia ㆍ )} 1 or 2 or more types 5-2mm 2-0.3mm 0.3mm-5㎛ Carbon raw materials (Amorphous, such as graphite black carbon black) 0.2mm-0.5㎛ Anti-oxidation additives (metal Al, metal A l-Si, metal Si, , ) 0.1mm Organic binders (phenol resins, emulsified vinyl acetate) - Inorganic Binder (Phosphate, Aluminum Phosphate, Sodium Silicate) -

However, the present invention is characterized in that the membership and the granularity of the membership is applied to various kinds of products.

Hereinafter, various embodiments to which the inorganic particle coating agent according to the present invention is applied will be described with reference to FIG. 4.

First, in the metal case 14 attached to the bubbling plug 10 which is an embodiment, the refractory particles (mullite ( ㆍ ), Alumina ( ), Magnesia ( ), Zircon ( ), Alumina to Zirconia ( ㆍ The composition ratio of the refractory particles is variously applied according to the particle size of 1 type or 2 types or more).

That is, when the particle size of the refractory particles is 5-2mm, the composition ratio is 20% or less, has a composition ratio of 40-80% at 2-0.3mm, 0-20% at 0.3-5㎛.

Carbon raw materials (amorphous such as graphite isotropic carbon black) added to improve the contents have a composition ratio within 10% when the particle size is 2mm-5㎛, and anti-oxidation additives (metal Al, metal Al-Si, metal Si) , , ), The composition ratio within 10% when the particle size is less than 0.1mm, the organic binder (phenol resin, emulsified vinyl acetate) and inorganic binder (phosphate, aluminum phosphate, sodium silicate solution) for adhesion are 5-60% It has a composition ratio of.

In addition, in another two embodiments, when the particle size of the refractory particles applied to the metal case 14 for the sliding plate 18 is 5-2 mm, the composition ratio is 20-40% or less, and the particle size of the refractory particles is 2- At 0.3 mm, the composition ratio is 20-50%, and when the particle size of the refractory particles is 0.3-5 µm, the composition ratio is 0-20%.

In another third embodiment of the present invention, if the refractory particle size of the other refractory material 20 without the metal case 14 is 5-2mm, there is no application, if the refractory particle size is 2-0.3mm the composition ratio When the 60-80% and the particle size of the refractory particles is 0.3mm-5㎛, the composition ratio is 10-30%.

In addition, in the second and third embodiments, the carbon raw material, the organic, inorganic binder, and the anti-oxidation additive have the same constituent ratio as the bubbling plug 10.

As described above, the present invention has been described in detail, but the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the present invention.

As described above, the present invention is easy to apply by mixing a binder that is easy to attach to the refractory particles of various particle sizes in a metal case or carbon-containing refractory material and spraying or applying it with a spray or a brush to form a protruding portion, thereby preventing slipping. It provides a stronger bond with the coating.

Claims (6)

In the coating agent for forming a protrusion for attachment to the counterpart on the surface of the refractory material or the metal case, The coating agent includes a plurality of refractory particles forming protrusions, a plurality of carbons for increasing solvent resistance when the refractory particles are mixed, a plurality of anti-oxidation additives for preventing the carbon from oxidizing at high temperatures, and Refractory particles, carbon, anti-oxidation additives are mixed to be applied to the surface of the refractory material or metal case, and then formed on the surface of the refractory material or metal case comprising an organic, inorganic binder to be bonded to each other Inorganic particle coating agent. The method of claim 1, The coating agent forms a protruding portion on the surface of the refractory material or metal case, characterized in that the particle size of the refractory particles is 5mm-5㎛, the carbon particle size is 0.2mm-0.5㎛, the particle size of the anti-oxidation additive is 0.1mm or less. Inorganic particle coating agent. The method of claim 2, The refractory particles have a particle size of 5mm-2mm or less 20%, 2mm-0.3mm particle size of 20-80%, 0.3mm-5㎛ particle size of less than 30% is characterized in that the composition or the metal case Inorganic particle coating agent to form protrusions on the surface. The method of claim 2, The carbon raw material, the anti-oxidation additive is an inorganic particle coating agent to form a protrusion on the surface of the refractory material or metal case, characterized in that the composition is less than 10%. The method of claim 2, The coating agent is an inorganic particle coating agent to form a protrusion on the surface of the refractory material or metal case, characterized in that the organic, inorganic binder is added 5-60%. The method of claim 1, The coating agent is an inorganic particle coating agent to form a protrusion on the surface of the refractory material or metal case, characterized in that the sprayed or applied using a spray or a brush after mixing in a stirrer before use.