CN112876266A - Continuous casting tundish dry ramming material and preparation method and application thereof - Google Patents
Continuous casting tundish dry ramming material and preparation method and application thereof Download PDFInfo
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- CN112876266A CN112876266A CN202110294808.5A CN202110294808A CN112876266A CN 112876266 A CN112876266 A CN 112876266A CN 202110294808 A CN202110294808 A CN 202110294808A CN 112876266 A CN112876266 A CN 112876266A
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- magnesia
- ramming mass
- reburning
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 title abstract description 13
- 238000002360 preparation method Methods 0.000 title abstract description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 33
- 235000019738 Limestone Nutrition 0.000 claims abstract description 13
- 239000006028 limestone Substances 0.000 claims abstract description 13
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 21
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- 239000001095 magnesium carbonate Substances 0.000 claims description 12
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 12
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 12
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 12
- 239000005011 phenolic resin Substances 0.000 claims description 12
- 229920001568 phenolic resin Polymers 0.000 claims description 12
- 229910021538 borax Inorganic materials 0.000 claims description 11
- 239000004328 sodium tetraborate Substances 0.000 claims description 11
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 11
- 229910052580 B4C Inorganic materials 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000009991 scouring Methods 0.000 abstract description 4
- 239000002893 slag Substances 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3821—Boron carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/442—Carbonates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a continuous casting tundish dry ramming mass and a preparation method and application thereof. The ramming material comprises the following components in parts by weight: 25-45 parts of fused magnesia, 20-35 parts of medium-grade magnesia, 25-35 parts of reburning magnesia, 2-8 parts of limestone and 3-10 parts of boron carbide (B4C). The components in the ramming mass are matched with each other, the prepared ramming mass has the characteristics of high temperature resistance, scouring resistance, acid and alkali resistance, high stability, strong oxidation resistance and the like, the high temperature resistance of a tundish working layer is improved, sintering is avoided, the anti-erosion capacity of the steel slag on a slag line part of the working layer is greatly improved, ladle sticking and sintering are avoided, ladle turning is easy, the requirements of steel-making continuous casting production are met, and the smooth production is ensured.
Description
Technical Field
The invention belongs to the field of steelmaking, and particularly relates to a continuous casting tundish dry ramming mass and a preparation method and application thereof.
Background
At present, dry ramming materials are basically used in domestic steelmaking continuous casting tundishes, but the dry ramming materials have various problems in the use process, such as various problems of poor scouring resistance, easy erosion, easy sintering of materials, ladle adhesion, difficult ladle turning, increased labor intensity and the like. In order to achieve the goal of smooth steel-making in steel mills, the dry ramming mass needs to be improved.
Disclosure of Invention
The invention provides a ramming material which comprises the following components in parts by weight: 25-45 parts of fused magnesia, 20-35 parts of medium-grade magnesia, 25-35 parts of reburning magnesia, 2-8 parts of limestone and boron carbide (B)4C) 3-10 parts.
According to the scheme of the invention, the ramming material comprises the following components in parts by weight: 30-40 parts of fused magnesia, 23-30 parts of medium-grade magnesia, 27-33 parts of reburning magnesia, 3-7 parts of limestone and 4-8 parts of boron carbide.
According to the scheme of the invention, the ramming mass further comprises phenolic resin, and the content of the phenolic resin is 2-8 parts, such as 3-6 parts. Further, the form of the phenolic resin is powder.
According to the scheme of the invention, the ramming mass further comprises borax, and the content of the borax is 1-5 parts, such as 2-4 parts. Furthermore, the form of the borax is powder.
According to the scheme of the invention, the grain size of the fused magnesia is fine powder, and the grain size is less than or equal to 0.074 mm. Further, the content of magnesium in the fused magnesite is 95% or more, for example, 96%.
According to the scheme of the invention, the particle size of the medium magnesia is 0.5-1 mm. Further, the content of magnesium in the medium magnesite is more than 93%, for example, 95%.
According to the scheme of the invention, the grain size of the reburning magnesite is 1-3 mm. Further, the content of magnesium in the reburning magnesite is 90% or more, for example, 90% or 91%.
According to the scheme of the invention, the particle size of the limestone is 0-3 mm.
According to the scheme of the invention, the ramming material comprises the following components in parts by weight: 35 parts of fused magnesia, 25 parts of medium-grade magnesia, 30 parts of reburning magnesia, 5 parts of limestone, 5 parts of boron carbide, 4 parts of phenolic resin powder and 2 parts of borax powder.
According to the scheme of the invention, the ramming material comprises the following components in parts by weight: 35 parts of fused magnesia, 25 parts of medium-grade magnesia, 30 parts of reburning magnesia, 4 parts of limestone, 6 parts of boron carbide, 4 parts of phenolic resin powder and 2 parts of borax powder.
The invention provides a preparation method of the ramming mass, which comprises the following steps: the components are fully and uniformly mixed in a star-shaped forced casting machine or a sand mixer according to the mixture ratio.
The invention also provides the application of the ramming mass in a continuous casting tundish.
The invention has the beneficial effects that:
the components in the ramming mass are matched with each other, the prepared ramming mass has the characteristics of high temperature resistance, scouring resistance, acid and alkali resistance, high stability, strong oxidation resistance and the like, the high temperature resistance of a tundish working layer is improved, sintering is avoided, the anti-erosion capacity of the steel slag on a slag line part of the working layer is greatly improved, ladle sticking and sintering are avoided, ladle turning is easy, the requirements of steel-making continuous casting production are met, and the smooth production is ensured.
The temperature is above 2300 ℃, the stability is good, the acid and alkali resistance is high, the scouring resistance is good, the molten steel quality is not affected, but the molten steel quality is improved, on the whole, the efficiency of the tundish working layer is improved, the service time is prolonged, the tundish is absolutely not sintered and is not stuck, the steel-making and steel-drawing are smoothly ensured, under the condition of using the same other materials, the original use time is about 20 hours and can be prolonged to about 30 hours, the raw materials are saved, the labor intensity is greatly reduced, the cost is greatly reduced, and the good economic benefit is obtained.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.
Example 1
The continuous casting tundish dry ramming material comprises the following components:
96 portions of fused magnesite (fine powder)
25 portions of 95 middle-grade magnesite (1-0.5 mm)
30 portions of 90-reburning magnesia (3-1 mm)
5 portions of limestone (3-0 mm)
Adding 4 portions of phenolic resin powder
Adding 2 portions of borax powder
B4C (fine grade micropowder) 5 parts
The raw materials are put into a star forcing machine according to the variety and specification proportion, are fully and uniformly mixed, and are bagged and marked for later use on site.
When the product is used in the middle layer of a five-meter first thick plate, the detection result of the product is as follows: bulk density 2.8g/cm3The baking strength at 300 ℃ is 6MPa, and the baking strength at 1600 ℃ is 40 MPa.
Example 2
The continuous casting tundish dry ramming material comprises the following components:
96 portions of fused magnesite (fine powder)
25 portions of 95 middle-grade magnesite (1-0.5 mm)
30 portions of 90-reburning magnesia (3-1 mm)
4 portions of limestone (3-0 mm)
Adding 4 parts of phenolic resin powder
Adding 2 portions of borax powder
B4C (fine grade micropowder) 6 parts
The procedure was as in example 1.
The detection result is that when the method is used in the middle layer of a first thick plate of five meters, the detection result is as follows: bulk density 2.85g/cm3The baking strength at 300 ℃ is 4MPa, and the baking strength at 1650 ℃ is 45 MPa.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The ramming mass is characterized by comprising the following components in parts by weight: 25-45 parts of fused magnesia, 20-35 parts of medium-grade magnesia, 25-35 parts of reburning magnesia, 2-8 parts of limestone and 3-10 parts of boron carbide (B4C).
2. The ramming mass of claim 1, wherein the ramming mass comprises, in parts by weight: 30-40 parts of fused magnesia, 23-30 parts of medium-grade magnesia, 27-33 parts of reburning magnesia, 3-7 parts of limestone and 4-8 parts of boron carbide.
3. The ramming mass according to claim 1, wherein the ramming mass further comprises a phenolic resin, and the content of the phenolic resin is 2-8 parts; the form of the phenolic resin is powder.
4. The ramming mass according to claim 1, further comprising borax in an amount of 1-5 parts, wherein the borax is in the form of powder.
5. The ramming mass according to claim 1, wherein the fused magnesite clinker has a grain size grade of fine powder, and the grain size of the fine powder is less than or equal to 0.074 mm; the content of magnesium in the fused magnesia is more than 95 percent.
6. The ramming mass according to claim 1, wherein the medium magnesite grain size is 0.5-1 mm; the content of magnesium in the medium magnesia is more than 93 percent;
the grain size of the reburning magnesite is 1-3 mm; the content of magnesium in the reburning magnesite is more than 90%;
the particle size of the limestone is 0-3 mm.
7. The ramming mass of claim 1, wherein the ramming mass comprises, in parts by weight: 35 parts of fused magnesia, 25 parts of medium-grade magnesia, 30 parts of reburning magnesia, 5 parts of limestone, 5 parts of boron carbide, 4 parts of phenolic resin powder and 2 parts of borax powder.
8. The ramming mass of claim 1, wherein the ramming mass comprises, in parts by weight: 35 parts of fused magnesia, 25 parts of medium-grade magnesia, 30 parts of reburning magnesia, 4 parts of limestone, 6 parts of boron carbide, 4 parts of phenolic resin powder and 2 parts of borax powder.
9. A process for preparing a ramming mass according to any one of claims 1 to 8, comprising the steps of: the components are fully and uniformly mixed in a star-shaped forced casting machine or a sand mixer according to the mixture ratio.
10. Use of the ramming mass according to any one of claims 1 to 8 in a continuous casting tundish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110294808.5A CN112876266A (en) | 2021-03-19 | 2021-03-19 | Continuous casting tundish dry ramming material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110294808.5A CN112876266A (en) | 2021-03-19 | 2021-03-19 | Continuous casting tundish dry ramming material and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN112876266A true CN112876266A (en) | 2021-06-01 |
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| CN202110294808.5A Pending CN112876266A (en) | 2021-03-19 | 2021-03-19 | Continuous casting tundish dry ramming material and preparation method and application thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005289724A (en) * | 2004-03-31 | 2005-10-20 | Sumitomo Metal Ind Ltd | REFRACTORY FOR DRY PROCESS VIBRATION CONSTRUCTION WORK CONTAINING WASTE MATERIAL OF MgO-C BRICK |
| WO2008056655A1 (en) * | 2006-11-06 | 2008-05-15 | Krosakiharima Corporation | Durable sleeve bricks |
| CN102391003A (en) * | 2011-08-05 | 2012-03-28 | 海城市中兴镁质合成材料有限公司 | MgO-Cr2O3 ramming material for VOD (Vacuum Oxygen Decarburization) steel ladle safety liner |
| CN109400121A (en) * | 2018-12-29 | 2019-03-01 | 河南新拓耐火材料有限公司 | A kind of steel ladle sliding water gap does not soak magnalium slide plate and preparation method thereof with not burning |
| CN109485390A (en) * | 2018-12-29 | 2019-03-19 | 海城市中兴镁质合成材料有限公司 | A kind of ladle magnesian ramming mass and its preparation, application method |
| CN111018497A (en) * | 2019-12-09 | 2020-04-17 | 湖北安耐捷炉衬材料有限公司 | Alkaline ramming material for medium-frequency induction furnace |
-
2021
- 2021-03-19 CN CN202110294808.5A patent/CN112876266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005289724A (en) * | 2004-03-31 | 2005-10-20 | Sumitomo Metal Ind Ltd | REFRACTORY FOR DRY PROCESS VIBRATION CONSTRUCTION WORK CONTAINING WASTE MATERIAL OF MgO-C BRICK |
| WO2008056655A1 (en) * | 2006-11-06 | 2008-05-15 | Krosakiharima Corporation | Durable sleeve bricks |
| CN102391003A (en) * | 2011-08-05 | 2012-03-28 | 海城市中兴镁质合成材料有限公司 | MgO-Cr2O3 ramming material for VOD (Vacuum Oxygen Decarburization) steel ladle safety liner |
| CN109400121A (en) * | 2018-12-29 | 2019-03-01 | 河南新拓耐火材料有限公司 | A kind of steel ladle sliding water gap does not soak magnalium slide plate and preparation method thereof with not burning |
| CN109485390A (en) * | 2018-12-29 | 2019-03-19 | 海城市中兴镁质合成材料有限公司 | A kind of ladle magnesian ramming mass and its preparation, application method |
| CN111018497A (en) * | 2019-12-09 | 2020-04-17 | 湖北安耐捷炉衬材料有限公司 | Alkaline ramming material for medium-frequency induction furnace |
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Application publication date: 20210601 |