CN103130519A - Material for sealing electroslag furnace crystallizer and bottom water box and preparation method thereof - Google Patents
Material for sealing electroslag furnace crystallizer and bottom water box and preparation method thereof Download PDFInfo
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- CN103130519A CN103130519A CN2013100828506A CN201310082850A CN103130519A CN 103130519 A CN103130519 A CN 103130519A CN 2013100828506 A CN2013100828506 A CN 2013100828506A CN 201310082850 A CN201310082850 A CN 201310082850A CN 103130519 A CN103130519 A CN 103130519A
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- electroslag
- crystallizer
- sealing
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- electroslag furnace
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Abstract
The invention discloses a material for sealing an electroslag furnace crystallizer and a bottom water box and a preparation method thereof. The invention aims to solve the problems of environment pollution and high cost in the existing sealing mode using asbestos boards. The material is prepared from the following raw materials in percentage by weight: 60-70% of calcium fluoride, 25-26.5% of aluminum oxide and 3.5-12.5% of calcium oxide. The invention mainly has the following advantages: the invention implements reutilization of electroslag charge, and can implement the waste recycling in a cloth bag dust collection mode; the waste discharge is decreased, thereby avoiding the environmental pollution; the material is fine, and has the advantages of low consumption and favorable sealing property in the production process; the components of the material are the same as those of the electroslag charge for production, thereby preventing other deleterious materials from being mixed into the smelting product to influence the quality of the electroslag ingot or pollute the molten steel, and ensuring the product quality; and the invention promotes energy conservation and consumption reduction, and lowers the production cost.
Description
Technical field
The invention belongs to the steel-making industry, is the material of a kind of electroslag melting process crystallizer and end tank seal specifically.
Background technology
At present, in the esr production process, crystallizer is connected the general asbestos plate that adopts of sealing with end water tank, by sealing function, make crystallizer and end water tank form airtight structure of container, in the electroslag melting production process, guarantees to produce qualified ESR ingot.Asbestos pad is large usage quantity in normal productive process, and asbestos pad passes through the operations such as mix and blend, hot-rolling moulding, sulfuration and makes take fibrous magnesium silicate, rubber as main raw material is aided with rubber ingredients and stopping composition again, and a large amount of objectionable impuritiess such as S are contained in inside.About 10000 yuan/tons of this material market valency, thickness is 3mm.Before use, need to make asbestos pad circlewise by oneself by the buying asbestos plate and according to crystallizer and closed requirement of end water tank, 2/3rds material becomes waste material, causes larger waste.If directly order finished product, unit price is 60 yuan/, and in normal production, every day, consumption was 1400 yuan, and consumption in single month reaches 42000 yuan, so use this material mainly to have following problem:
1) owing to containing a large amount of objectionable impuritiess in asbestos component, cause ESR ingot to increase S, gas exceeds standard, and has a strong impact on quality product;
2) the asbestos pad safety performance is lower, the asbestos pad adaptive temperature is generally at 400-500 ℃, and the electroslag melting temperature is up to more than 1200 ℃, in the electroslag melting process, if misoperation or high-temperature molten steel seepage are easy to cause the asbestos pad scaling loss, cause security incident;
3) along with the maximization of electroslag furnace, the raising of product production, the asbestos pad usage quantity progressively increases, and obviously increases production cost.
Summary of the invention
The material that the purpose of this invention is to provide a kind of crystallizer for electroslag furnace and end tank seal is to solve the existing problem that adopts the asbestos plate sealing to pollute environment, cost.
Another object of the present invention is to provide a kind of preparation method of sealing material.
The material of a kind of crystallizer for electroslag furnace and end tank seal is characterized in that it is made by the raw material of following weight percent: the Calcium Fluoride (Fluorspan) of 60-70%, the aluminium sesquioxide of 25-26.5%, 3.5-12.5% calcium oxide.
As a further improvement on the present invention, the material of a kind of crystallizer for electroslag furnace and end tank seal also contains the magnesium oxide that weight percentage is 0.1-5% in raw material.
A kind of crystallizer for electroslag furnace and end tank seal material preparation method comprise the steps:
A, Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide raw material are put into resistance furnace toasted 1.5-2.5 hours under 500 ~ 600 ℃ of conditions;
B, raw material is carried out Calcium Fluoride (Fluorspan), the aluminium sesquioxide of 25-26.5%, the 3.5-12.5% calcium oxide of ball-milling processing: 60-70% according to following proportioning, can also be added with the magnesium oxide that weight percentage is 0.1-5%, raw material after ball milling is powdery, and particle is 1-100 μ m; A part reaches the one-level material as sealing material that granularity requires, simultaneously with clout as the electroslag melting raw material; The slag raw material adds in normal productive process and carries out melting in the nickel alloy electricity slag smelting furnace, adopts the bag collection device that material in the electroslag melting process is collected to the powder that produces in fusion process simultaneously, and collection material is second stage material;
C, according to user demand, the I and II material is mixed and be finished product.Carried out drying treatment before using.
In process of production, according to crystallizer bottom margin size, make ring groove, thickness is in the 5mm left and right; During use, ring groove is positioned over water tank surface, the end, material is inserted in ring groove, after the compacting cleaning, removed ring groove, crystallizer is placed on it, fine rotation is utilized the crystallizer own wt, makes the sealing material compacting, the fine and smooth characteristic of this material can seal crystallizer and end water tank fully, realizes melting production.
General disintegrating slag material need to manually grind, and it contains more mechanically resistant material, by special broken processing, to reach the micronize effect, makes cost up, and can cause the slag charge waste.This material is difficult to process as dust waste, also contains the objectionable impuritiess such as fluorine, abandons rear serious environment pollution.Utilize the advantage that its composition of this material is consistent with the productive power slag charge, material is fine and smooth, used as sealing material, be used for substituting the high temperature asbestos pad, because its material is the electroslag material, also can not pollute steelmaking system, this material has been applied to middle trial production.
The present invention selects a kind of sealing material, and this material is powdery, and its particle diameter is at 1-100 μ m, generally more than 10 μ m, can natural subsidence, and very fine and smooth, composition is mainly by Al
2O
3, CaF
2, CaO, MgO form.Calcium fluoride raw material is fluorite, CaF
2Content is 97-98%, and outward appearance is translucent, emerald green bulk, and broken front water rinses removes surface contaminants, uses granularity≤5mm or uses Fluorspar Powder; The calcium oxide raw material is lime, and CaO content is 95-98%, and fracture is pure white look, bulk; Aluminium sesquioxide is the technical purity aluminium oxide powder, Al
2O
3Content is greater than 99%, and granularity is 0.15mm; Raw materials of magnesium oxide is magnesia, MgO content 〉=92% wherein, and granularity is 2.5mm.These raw materials make up by different ratios, reach through normal productive process ball milling, screening rear portion the one-level material as sealing material that granularity requires, simultaneously with clout as the electroslag melting raw material, adopt the mode of bag collection to collect to the powder that produces in fusion process, as the secondary material of sealing material, the I and II material is evenly mixed be sealing material.
Beneficial effect of the present invention is mainly reflected in:
1) realize electroslag slag charge second stage employ, can utilize the bag collection mode to realize that this waste recycles;
2) reduce waste discharge, avoid environmental pollution;
3) material is fine and smooth, and usage quantity is few in process of production, favorable sealing property;
4) because its composition is consistent with the productive power slag charge, guarantee unlikely other hazardous materials of sneaking into of melting product, can not affect the ESR ingot quality, can not pollute molten steel, guarantee quality product; Promote to save energy and reduce the cost, reduce production costs.
Embodiment
The following examples can further illustrate the present invention, but do not limit the present invention in any way.
Embodiment 1
The materials such as Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide and magnesium oxide are put into resistance furnace, and baking is 1.5 hours under 500 ℃ of conditions, takes weight proportion and be 60% CaF
2, 25% Al
2O
3, 10% CaO, 5% MgO, total amount 14kg stirs, and carries out ball milling screening, reclaims first step material; All the other electroslag material are used for the production of 230kg nickel alloy electricity slag smelting furnace, adopt the bag collection mode to carry out second stage material collection in the time of the beginning electroslag melting, at last the I and II mixing of materials is used.
Embodiment 2
The materials such as Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide and magnesium oxide are put into resistance furnace, and baking is 2 hours under 580 ℃ of conditions, takes weight proportion and be 60% CaF
2, 25% Al
2O
3, 12.5% CaO, 2.5% MgO, total amount 14kg stirs, first step material is reclaimed in ball milling screening; All the other electroslag material are used for the production of 230kg nickel alloy electricity slag smelting furnace, adopt the bag collection mode to carry out second stage material collection in the time of the beginning electroslag melting, at last the I and II mixing of materials is used.
Embodiment 3
The materials such as Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide and magnesium oxide are put into resistance furnace, and baking is 2 hours under 580 ℃ of conditions, takes weight proportion and be 67.4% CaF
2, 26% Al
2O
3, 6.5% CaO, 0.1% MgO, total amount 14kg stirs, first step material is reclaimed in ball milling screening; All the other electroslag material are used for the production of 230kg nickel alloy electricity slag smelting furnace, adopt the bag collection mode to carry out second stage material collection in the time of the beginning electroslag melting, at last the I and II mixing of materials is used.
Embodiment 4
The materials such as Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide are put into resistance furnace toasted 2 hours under 550 ℃ of conditions, weight proportion is 65% CaF
2, 25% Al
2O
3, 10% CaO, 14kg stirs, first step material is reclaimed in the ball milling screening; All the other electroslag material are used for the production of 230kg nickel alloy electricity slag smelting furnace, adopt the bag collection mode to carry out second stage material collection in the time of the beginning electroslag melting, at last the I and II mixing of materials is used.
Embodiment 5
The materials such as Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide are put into resistance furnace, and baking is 2.5 hours under 600 ℃ of conditions, takes weight proportion and be 70% CaF
2, 26.5% Al
2O
3, 3.5% CaO, total amount 14kg stirs, first step material is reclaimed in the ball milling screening; All the other electroslag material are used for the production of 230kg nickel alloy electricity slag smelting furnace, adopt the bag collection mode to carry out second stage material collection in the time of the beginning electroslag melting, at last the I and II mixing of materials is used.
Claims (4)
1. the material of a crystallizer for electroslag furnace and end tank seal is characterized in that it is made by the raw material of following weight percent: the Calcium Fluoride (Fluorspan) of 60-70%, the aluminium sesquioxide of 25-26.5%, 3.5-12.5% calcium oxide.
2. the material of a kind of crystallizer for electroslag furnace according to claim 1 and end tank seal, is characterized in that: also contain the magnesium oxide that weight percentage is 0.1-5% in raw material.
3. a crystallizer for electroslag furnace and end tank seal material preparation method, is characterized in that it comprises the steps:
A, Calcium Fluoride (Fluorspan), aluminium sesquioxide, calcium oxide raw material are put into resistance furnace toasted 1.5-2.5 hours under 500 ~ 600 ℃ of conditions;
B, raw material is carried out Calcium Fluoride (Fluorspan), the aluminium sesquioxide of 25-26.5%, the 3.5-12.5% calcium oxide of ball-milling processing: 60-70% according to following proportioning, the feed particles after ball milling is 1-100 μ m;
The material that screening is reclaimed is first step material, and rest materials is as the slag raw material; Adopt the bag collection device that material in the electroslag melting process is collected, collection material is second stage material;
C, according to user demand, the I and II material is mixed and be finished product.
4. a kind of crystallizer for electroslag furnace according to right 3 and end tank seal material preparation method, is characterized in that: also be added with the magnesium oxide that weight percentage is 0.1-5% in step B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100828506A CN103130519A (en) | 2013-03-15 | 2013-03-15 | Material for sealing electroslag furnace crystallizer and bottom water box and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100828506A CN103130519A (en) | 2013-03-15 | 2013-03-15 | Material for sealing electroslag furnace crystallizer and bottom water box and preparation method thereof |
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|---|---|
| CN103130519A true CN103130519A (en) | 2013-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409641A (en) * | 2013-07-16 | 2013-11-27 | 辽宁科技大学 | Plugging method for bottom water tank and crystallizer during stripping electroslag re-melting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337820A (en) * | 2008-08-15 | 2009-01-07 | 上海宝湘耐火材料有限公司 | Locked coil rope fire-resistant material for continuous casting tundish crystallizer dummy ingot head and method for preparing same |
| CN101576161A (en) * | 2009-06-19 | 2009-11-11 | 武汉钢铁(集团)公司 | Steel ladle long nozzle sealing ring |
| EP2434027A1 (en) * | 2009-05-22 | 2012-03-28 | JFE Steel Corporation | Steel material for high heat input welding |
-
2013
- 2013-03-15 CN CN2013100828506A patent/CN103130519A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337820A (en) * | 2008-08-15 | 2009-01-07 | 上海宝湘耐火材料有限公司 | Locked coil rope fire-resistant material for continuous casting tundish crystallizer dummy ingot head and method for preparing same |
| EP2434027A1 (en) * | 2009-05-22 | 2012-03-28 | JFE Steel Corporation | Steel material for high heat input welding |
| CN101576161A (en) * | 2009-06-19 | 2009-11-11 | 武汉钢铁(集团)公司 | Steel ladle long nozzle sealing ring |
Non-Patent Citations (1)
| Title |
|---|
| 徐宏武 等: "《电渣重熔冶金》", 31 May 1994, 中国矿业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409641A (en) * | 2013-07-16 | 2013-11-27 | 辽宁科技大学 | Plugging method for bottom water tank and crystallizer during stripping electroslag re-melting |
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Application publication date: 20130605 |