CN114213111A - Aluminum-carbon soaking water inlet for accidents and preparation method - Google Patents

Abstract

The invention relates to an aluminum-carbon impregnated nozzle for accidents and a preparation method thereof. The invention has the beneficial effects that: the invention provides an aluminum-carbon soaking water inlet for accidents and a preparation method thereof, and the aluminum-carbon soaking water inlet is specially used for temporary replacement and use when the water inlet is in an accident, is free from baking, is convenient to use, and can ensure safe and smooth production.

Description

Aluminum-carbon soaking water inlet for accidents and preparation method

Technical Field

The invention relates to the technical field of metallurgical refractory products, in particular to an aluminum-carbon soaking water inlet for accidents and a preparation method thereof.

Background

Submerged entry nozzles for continuous casting are problematic in their use, and when they do not have a replaceable nozzle, they can cause great difficulties in the production of the customer. The common submerged nozzle needs to be baked before being used online, and the baking time is different from 45 to 90 minutes. If the steel is not baked, the steel can be directly put on the line, and the problems of water gap breakage, explosion, perforation, cold steel wall blockage and the like can be caused due to the heat stability problem.

The prior art has the following defects:

1) the existing baking-free submerged nozzle has high manufacturing cost and complex working procedures.

2) The existing baking-free submerged nozzle is inevitably used when not baked, so that the condition of cold steel is inevitably caused, and the flow blockage is caused.

3) The non-baking-free submerged nozzle cannot be replaced in time when an accident occurs, and continuous accidents are easily caused after replacement.

Disclosure of Invention

The invention provides an aluminum-carbon soaking water inlet for accidents and a preparation method thereof, and the aluminum-carbon soaking water inlet is specially used for temporary replacement and use when the water inlet is in an accident, is free from baking, is convenient to use, and can ensure safe and smooth production.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an accident is with aluminium carbon soaks water inlet, includes face, inside lining, body, the inside lining is in the body inboard, the face is in the upper end of inside lining and body, the inside lining is two-layer, and the inlayer is thermite layer, and the skin is the carbon-free slime layer.

The body material comprises the following components in parts by weight: 30-55 parts of brown corundum, 28-18 parts of graphite, 8-18 parts of fused quartz, 4-14 parts of alumina micro powder, 1-5 parts of metal silicon powder, 0.5-4 parts of boron carbide and 19-29 parts of a binding agent. The binder adopts 10-20 parts of solid resin powder and 9 parts of liquid resin.

The board material comprises the following components in parts by weight: 30-65 parts of white corundum, 10-20 parts of graphite, 10-30 parts of fused quartz, 5-15 parts of alumina micro powder, 0.1-3 parts of silicon carbide, 0.5-5 parts of boron carbide, and 5-20 parts of resin powder and liquid resin.

The carbon-free cement layer comprises the following materials in parts by weight: 40-50 parts of fused quartz, 20-40 parts of floating beads, 15-30 parts of alumina hollow spheres and 5-20 parts of phenolic resin.

A preparation method of an aluminum-carbon impregnated water inlet for accidents comprises the following steps:

1) firstly, preparing a lining, placing a layering pipe between a lining core mould and a lining mould, adding a thermite between the layering pipe and the lining core mould, adding a carbon-free mud material between the layering pipe and the lining mould, taking out the layering pipe, and forming by using low pressure of 50-70 MPa;

2) and after the lining is produced, performing integral forming, after the outer die is assembled, putting the lining on the middle core die, sequentially putting the plate fabric and the body material, and finally forming by using 90-130 MPa.

3) And (3) baking and curing the formed semi-finished product for 12-24 hours by using an electric heating drying kiln at the temperature of 200-270 ℃, taking out the semi-finished product after curing, and putting the semi-finished product into a cover type kiln for baking treatment.

Compared with the prior art, the invention has the beneficial effects that:

the invention is specially used for temporarily replacing the nozzle when the nozzle has an accident, is free from baking, is convenient to use and can ensure the safe and smooth production.

The invention does not need to be used for a long time, so a slag line is cancelled. Considering the problem of erosion of the covering slag, the product enhances the erosion resistance of the body to the covering slag, namely, under the condition of ensuring the thermal stability, the granularity ratio of the pug is integrally reduced, the body density is improved, and the addition of silicon carbide and boron carbide is increased.

Because the invention is used for temporary standby in accidents and needs no baking for line feeding, in order to prevent the problem of cold steel solidification after the water gap at room temperature is fed on line, the innermost layer of the lining is added with a thermite layer for thermite reaction, the molten steel reaches the reaction temperature when passing through the inner cavity, and the heat is released to further reduce cold steel condensation.

The invention has simple structure, low cost, no baking, quick line feeding, can quickly solve the water gap accident and ensure the safe and smooth production.

Drawings

FIG. 1 is a schematic view of an aluminum carbon impregnated water inlet for accident in accordance with the present invention.

Fig. 2 is an enlarged view of point I in fig. 1.

In the figure: 1-body, 2-carbon-free slurry layer, 3-plate surface and 4-thermite layer.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

referring to fig. 1-2, the aluminum carbon immersion water inlet for accidents comprises a plate surface 3, an inner lining and a body 1, wherein the inner lining is arranged on the inner side of the body 1, the plate surface 3 is arranged at the upper ends of the inner lining and the body 1, the inner lining is divided into two layers, the inner layer is a thermite layer 4, and the outer layer is a carbon-free mud material layer 2.

Examples bulk materials are shown in table 1; example panel materials are shown in table 2; examples carbon-free pug layer materials are shown in table 3.

Table 1 examples bulk materials

Raw materials	Example 1 (parts)	Example 2 (parts)	Example 3 (parts)	Example 4 (parts)
					From 36#、80#Brown corundum with grain size of F180	31	40	45	50
+ 895-198 graphite	19	25	26	23
					Fused quartz	10	15	17	25
Alumina micropowder	5	10	12	9
					98 metal silicon powder	2	3	5	4
Boron carbide	1	3	3.5	2
					Binding agents	20	25	24	26

Table 2 examples example panel materials

Raw materials	Example 1 (parts)	Example 2 (parts)	Example 3 (parts)	Example 4 (parts)
					White corundum	35	45	60	50
+ 898-198 graphite	12	15	18	13
					Fused quartz	11	16	28	25
Alumina micropowder	6	13	14	8
					Silicon carbide	2.5	3	0.5	0.9
Boron carbide	3.5	2	4.5	3
					Resin powder and liquid resin	6	18	15	10

Table 3 examples carbon-free pug layer materials

The embodiment provides a preparation method of an aluminum-carbon impregnated water inlet for accidents, which comprises the following steps:

1) preparing mud materials: after the ingredients are mixed and are kept still for 24 hours in the constant-temperature constant-humidity material warehouse, the molding step is carried out in a constant-temperature constant-humidity workshop;

2) firstly, preparing a lining, placing a layering pipe between a lining core mould and a lining mould, adding a thermite between the layering pipe and the lining core mould, adding a carbon-free mud material between the layering pipe and the lining mould, then taking out the layering pipe, and forming by using 70MPa of low pressure;

3) and after the lining is produced, performing integral forming, after the outer die is assembled, putting the lining on the middle core die, sequentially putting the plate fabric and the body material, and finally forming by using 110 MPa.

4) And (3) baking and curing the formed semi-finished product for 16 hours by using an electric heating drying kiln at 250 ℃, taking out the semi-finished product after curing, and putting the semi-finished product into a cover type kiln for firing treatment.

5) And (4) performing car processing on the fired product, coating an anti-oxidation coating and coating refractory cotton, and then completing all working procedures.

Claims (5)

1. The utility model provides an accident soaks water with aluminium carbon, its characterized in that includes face, inside lining, body, the inside lining is in the body inboard, the face is in the upper end of inside lining and body, the inside lining is two-layer, and the inlayer is thermite layer, and the skin is the carbon-free slime layer.

2. The accident aluminum carbon impregnated water inlet of claim 1 wherein said bulk material comprises, in parts by weight: 30-55 parts of brown corundum, 28-18 parts of graphite, 8-18 parts of fused quartz, 4-14 parts of alumina micro powder, 1-5 parts of metal silicon powder, 0.5-4 parts of boron carbide and 19-29 parts of a binding agent.

3. The aluminum-carbon impregnated water inlet for accidents according to claim 1, wherein the plate material comprises the following components in parts by weight: 30-65 parts of white corundum, 10-20 parts of graphite, 10-30 parts of fused quartz, 5-15 parts of alumina micro powder, 0.1-3 parts of silicon carbide, 0.5-5 parts of boron carbide, and 5-20 parts of resin powder and liquid resin.

4. The aluminum-carbon impregnated water inlet for accidents according to claim 1, wherein the carbon-free sludge layer comprises the following materials in parts by weight: 40-50 parts of fused quartz, 20-40 parts of floating beads, 15-30 parts of alumina hollow spheres and 5-20 parts of phenolic resin.

5. The method of making an accident aluminum carbon immersion water according to any one of claims 1 to 4, comprising the steps of:

preparing mud materials: after the ingredients are mixed and are kept still for 24 hours in the constant-temperature constant-humidity material warehouse, the molding step is carried out in a constant-temperature constant-humidity workshop;

1) firstly, preparing a lining, placing a layering pipe between a lining core mould and a lining mould, adding a thermite between the layering pipe and the lining core mould, adding a carbon-free mud material between the layering pipe and the lining mould, taking out the layering pipe, and forming by using low pressure of 50-70 MPa;

2) and after the lining is produced, performing integral forming, after the outer die is assembled, putting the lining on the middle core die, sequentially putting the plate fabric and the body material, and finally forming by using 90-130 MPa.

3) And (3) baking and curing the formed semi-finished product for 12-24 hours by using an electric heating drying kiln at the temperature of 200-270 ℃, taking out the semi-finished product after curing, and putting the semi-finished product into a cover type kiln for baking treatment.

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