CN106747509B - A kind of ladle wall carbon-free pressed machine brick and preparation method thereof - Google Patents
A kind of ladle wall carbon-free pressed machine brick and preparation method thereof Download PDFInfo
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- CN106747509B CN106747509B CN201611145660.4A CN201611145660A CN106747509B CN 106747509 B CN106747509 B CN 106747509B CN 201611145660 A CN201611145660 A CN 201611145660A CN 106747509 B CN106747509 B CN 106747509B
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- 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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- 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
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Abstract
A kind of ladle wall carbon-free pressed machine brick and preparation method thereof, using bauxite clinker, diamond spar series raw material, fused magnesite, electric smelting spinelle, active а-alumina powder as primary raw material, spent pulping liquor is added, is prepared using magnalium cementing agent, calgon, yellow starch gum, several raw materials of carboxymethyl cellulose as combined binder, the compression moulding on 500-800 tons of friction press after mixing evenly in high-speed mixer；Qualified green body will be examined to be sent into tunnel drying oven after molding to be heat-treated, 80 DEG C -100 DEG C of dry kiln inlet temperature, keeps the temperature 180 DEG C -250 DEG C of silicon carbide, 80 DEG C -100 DEG C of outlet temperature, heat treatment time is not less than 20 hours；The present invention uses inorganic combination, and cement, high-temperature behavior be not good；Using mechanical pressing, bulk density is big, and the porosity is low, and erosion-resisting characteristics is strong；Using mechanical pressing low-temperature bake technology, rhythm of production is fast.
Description
Technical field
The invention belongs to fire resisting material fields, and in particular to a kind of ladle wall carbon-free pressed machine brick and preparation method thereof.
Background technique
With being continuously increased to various fine steel grade demands, iron and steel smelting technology personnel are to various refractory materials in metallurgy
The carburetting problem of steel grade is paid attention to further in technical process, it is desirable that subtract as far as possible in smelting low carbon fine steel grade technical process
The use of few carbon containing refractory is to molten steel recarburization adverse effect.The technique of clean steel can be described as to molten steel decarburization
With the process for substantially reducing the impurity elements such as O, S, N, P, H.The development of mild steel, ultra-low-carbon steel, corresponding requirements develop low-carbon or
Carbon-free refractories.For this purpose, steel mill requires containment wall to use carbon free precast block to reduce pollution of the carbon containing refractory to molten steel,
Wrap bottom castable or carbon free precast block.Currently, domestic carbon-free ladle wall generally uses prefabricated section to build, although carbon-free prefabricated
Block is not carbon containing, but since brick is small, production efficiency is too slow, while workshop requires place greatly to put mold, with first-class various
Condition limits the rhythm of production of carbon free precast block, not can guarantee the production of high-volume prefabricated section at all；In addition, due to prefabricated section
It is required that the long influence along with factors such as bakings of curing time causes the production cycle of prefabricated section especially long, it is fast that it is not able to satisfy steel mill
The needs of rhythm production.Therefore research fast pace production ladle wall becomes working as current fire resisting material field with carbon-free pressed machine brick
It is engaged in anxious.
Summary of the invention
The purpose of the present invention is intended to overcome the shortcomings that production prefabricated section, provides that a kind of rhythm of production is fast, high-temperature behavior is good, anti-
The carbon-free pressed machine brick of the strong ladle wall of erosion performance, it is a further object of the present invention to provide a kind of carbon-free machine pressures of ladle wall
The preparation method of brick.
In order to achieve the above objectives, the present invention is solved using following scheme: a kind of ladle wall carbon-free pressed machine brick, Qi Geyuan
Expect that the composition of component unit serving meter by weight is as follows: 15-25 parts of 3-5mm aggregate, 20-35 parts of 1-3mm aggregate, 0.088-1mm bone
8-15 parts of material, the above aggregate are one of bauxite clinker, fused magnesite or corundum system refractory raw material or a variety of, corundum system fire resisting
Raw material includes alundum, fused white corundum, Brown Alundum；1-5 parts of 0.088-1mm fused magnesite aggregate, 325 mesh of white fused alumina fine powder
10-15 parts, 10-18 parts of 325 mesh of electric smelting spinelle fine powder, activity а -3-10 parts of alumina powder, 180 mesh 3- of fused magnesite fine powder
8 parts, 0.5-5 parts of magnalium cementing agent, 0.2-2 parts of calgon, 0.1-2 parts of yellow starch gum, 0.1-1 parts of carboxymethyl cellulose, paper
1-5 parts of pulp waste, paper pulp specific gravity >=1.25 g/cm in spent pulping liquor3；Mechanical pressing after above-mentioned various raw materials mix in proportion,
And it is thermally treated and be made.
Above-mentioned ladle wall material performance described in carbon-free pressed machine brick is as follows:
1) bauxite clinker, Al2O3Content >=88%, bulk density >=3.25g/cm3, Fe2O3Content≤1.5%.
2) corundum system refractory raw material is one or more of alundum, fused white corundum, Brown Alundum, and granularity is
3-5mm, 1-3mm, 0.088-1mm, 325 mesh；
Fused white corundum: Al2O3>=98.5%, Fe2O3≤ 0.3, Na2O≤0.5, true specific gravity >=3.94 g/cm3；
Brown Alundum: Al2O3>=94.5%, Fe2O3≤ 0.3, Si2O≤1.0, true specific gravity >=3.80 g/cm3；
Alundum: Al2O3>=99.0%, Fe2O3≤ 0.1%, Si2O≤0.2%, bulk density >=3.65 g/cm3。
3) active а-alumina powder, Al2O3>=99.0%, average grain diameter≤10 μm；
4) fused magnesite, content of MgO >=96%, bulk density >=3.4 g/cm3, SiO2Content≤2.0%, CaO content≤
2.0%；
5) 325 mesh of electric smelting spinelle fine powder, Al2O3Content 70%~80%, content of MgO 20%~30%；
6) magnalium cementing agent Al2O3Content >=1.5%, content of MgO >=45%, CaO content≤2.0%, SiO2Content≤2.0%；
7) calgon, P2O5Content >=68%；
8) yellow starch gum, cohesive force >=1.5Kg/cm2；
9) spent pulping liquor, specific gravity >=1.25 g/cm3。
It is of the invention the preparation method is as follows:
(1) it is kneaded；It is 1-2 minutes dry-mixed in high speed muller that various aggregates are first weighed in proportion, and it is useless that paper pulp is then added
Liquid is kneaded 3-5 minutes, is added magnalium cementing agent, calgon, yellow starch gum, carboxymethyl cellulose mixture and is being stirred
It is stirred 3-5 minutes in machine, is eventually adding remaining fused magnesite fine powder in formula, electric smelting spinelle fine powder, active а-aluminium oxide
Micro mist, white fused alumina fine powder are kneaded 10-15 minutes in the stirring of blender high speed and go out pug；
(2) green compact；Uniformly mixed pug is added in mold, is pressed into green body on 500-800 tons of friction presses；
(3) it is heat-treated；Qualified green body will be examined to be sent into tunnel drying oven to be heat-treated, dry kiln inlet temperature
80 DEG C -100 DEG C, 180 DEG C -250 DEG C of silicon carbide are kept the temperature, 80 DEG C -100 DEG C of outlet temperature, heat treatment time is not less than 20 hours.
The present invention is by unique process recipe and completely new articulated system, using technique road identical with production magnesia carbon brick
Line successfully solves the problems, such as that using carbon free precast block, rhythm of production is slow when as carbon-free containment wall.Using inorganic combination, be free of
Cement etc. influences the substance of elevated temperature strength, therefore high-temperature behavior is good.Using mechanical pressing, bulk density is big, and the porosity is low, anti-to invade
Corrosion can be strong.
Primary raw material of the present invention selects bauxite clinker, corundum system raw material, electric smelting aluminum-spinel, fused magnesite etc.；This kind
Product is allowed to the intensity satisfaction transport requirement for having certain using low-temperature bake technology after producing.The knot used due to it
Collaboration system is not carbon containing, thus in smelting low carbon steel, ultra-low-carbon steel, it not will form molten steel recarburization to pollute molten steel；Pass through conjunction
In-suit spinel reaction process of the grain composition and control product of reason in baking, use process, keeps material with higher
Bulk density, the lower porosity and relatively high thermal shock resistance energy, the comprehensive service life for improving bricking.In conjunction with
System using magnalium cementing agent, six partially, yellow starch gum, carboxymethyl cellulose it is several it is compound be used as bonding agent, can obtain at low temperature
Very high intensity is obtained, 80MPa or more can be reached.With the raising of temperature, occur in succession again in conjunction with other materials in system
Effect promotes the intensity without carbon brick.When temperature reaches 1200 DEG C or more, the present invention in introduce active а-aluminium oxide, electric smelting
The fine powders such as magnesia occur chemical reaction and form spinelle, and can improve the bond strength of matrix, that is to say, that the present invention from
To medium temperature, high temperature, intensity will not reduce type, fully meet the needs of steel mill's production.
Specific embodiment
Embodiment 1
Prepare 20 parts of 3-5mm alundum aggregate, 30 parts of alundum aggregate 1-3mm, white fused alumina aggregate 0.088-1mm
15 parts；Prepare 12 parts of 325 mesh of white fused alumina fine powder, 10 parts of 325 mesh of electric smelting spinelle fine powder, active 5 parts of а-alumina powder, electricity
5 parts of 180 mesh of fused magnesia fine powder；Prepare 3 parts of magnalium cementing agent, 1 part of calgon, 0.5 part of yellow starch gum, carboxymethyl cellulose
0.2 part, magnalium cementing agent, calgon, yellow starch gum, carboxymethyl cellulose are pre-mixed by required number and are made
Premixing flour；Prepare 2.5 parts of spent pulping liquor.The aggregate prepared is added to it is 1-2 minutes dry-mixed in blender, after mixing evenly plus
Enter 2.5 parts of spent pulping liquor and continue stirring 3-5 minutes, magnalium cementing agent, calgon, yellow starch gum, carboxymethyl is then added
The premixing flour of cellulose stirs 3-5 minutes, is eventually adding remaining other fine powder high-speed stirreds and goes out pug in 10-15 minutes, pug exists
Compression moulding on 500-800 tons of friction press can be prepared by the product after being heat-treated in tunnel type drying kiln, dry
80 DEG C -100 DEG C of dry kiln inlet temperature, 180 DEG C -250 DEG C of silicon carbide of heat preservation, 80 DEG C -100 DEG C of outlet temperature, heat treatment time
Not less than 20 hours.
Embodiment 2
Prepare 20 parts of 3-5mm bauxite clinker aggregate, 30 parts of fused brown corundum aggregate 1-3mm, white fused alumina aggregate 0.088-
15 parts of 1mm；Prepare 12 parts of 325 mesh of white fused alumina fine powder, 10 parts of 325 mesh of electric smelting spinelle fine powder, active 5 parts of а-alumina powder,
5 parts of 180 mesh of fused magnesite fine powder；Prepare 3 parts of magnalium cementing agent, 1 part of calgon, 0.5 part of yellow starch gum, carboxymethyl cellulose
0.2 part, magnalium cementing agent, calgon, yellow starch gum, carboxymethyl cellulose are pre-mixed by required number and are made
Premixing flour；Prepare 2.5 parts of spent pulping liquor.The aggregate prepared is added to it is 1-2 minutes dry-mixed in blender, after mixing evenly plus
Enter 2.5 parts of spent pulping liquor and continue stirring 3-5 minutes, magnalium cementing agent, calgon, yellow starch gum, carboxymethyl is then added
The premixing flour of cellulose stirs 3-5 minutes, is eventually adding remaining other fine powder high-speed stirreds and goes out pug in 10-15 minutes, pug exists
Compression moulding on 500-800 tons of friction press can be prepared by the product after being heat-treated in tunnel type drying kiln, dry
80 DEG C -100 DEG C of dry kiln inlet temperature, 180 DEG C -250 DEG C of silicon carbide of heat preservation, 80 DEG C -100 DEG C of outlet temperature, heat treatment time
Not less than 20 hours.
Embodiment 3
Prepare 20 parts of 3-5mm bauxite clinker aggregate, 30 parts of bauxite clinker aggregate 1-3mm, bauxite clinker aggregate 0.088-
12 parts of 1mm, 3 parts of 0.088~1mm fused magnesite aggregate；Prepare 12 parts of 325 mesh of white fused alumina fine powder, electric smelting spinelle fine powder 325
10 parts of mesh, active 5 parts of а-alumina powder, 5 parts of 180 mesh of fused magnesite fine powder；Prepare 3 parts of magnalium cementing agent, calgon 1
Part, 0.5 part of yellow starch gum, 0.2 part of carboxymethyl cellulose, by magnalium cementing agent, calgon, yellow starch gum, carboxymethyl cellulose
Four according to the required weight number be pre-mixed premixing flour be made；Prepare 2.5 parts of spent pulping liquor.The aggregate prepared is added to
It is 1-2 minutes dry-mixed in blender, it is stirring evenly and then adding into 2.5 parts of spent pulping liquor and continues stirring 3-5 minutes, magnalium is then added
Cementing agent, calgon, yellow starch gum, carboxymethyl cellulose premixing flour stir 3-5 minute, be eventually adding the other fine powders of residue
Go out pug, pug compression moulding on 500-800 tons of friction press, in tunnel type drying kiln within high-speed stirred 10-15 minutes
In be heat-treated after can be prepared by the product, 80 DEG C -100 DEG C of drying kiln inlet temperature, keep the temperature 180 DEG C -250 of silicon carbide
DEG C, 80 DEG C -100 DEG C of outlet temperature, heat treatment time is not less than 20 hours.
Embodiment 1 is primarily adapted for use in capacity and uses on 200 tons and 200 tons or more ladles；Embodiment 2 is primarily adapted for use in appearance
Amount uses on 120 tons or more 200 tons or less ladles；Embodiment 3 is primarily adapted for use in capacity and uses on 120 tons or less ladles.
Claims (5)
1. a kind of carbon-free pressed machine brick of ladle wall, it is characterised in that the composition of its each material component unit serving meter by weight is such as
Under: 15-25 parts of 3-5mm aggregate, 20-35 parts of 1-3mm aggregate, 8-15 parts of 0.088-1mm aggregate, the above aggregate be bauxite clinker,
One of fused magnesite or corundum system refractory raw material are a variety of, corundum system refractory raw material include alundum, fused white corundum,
Brown Alundum；1-5 parts of 0.088-1mm fused magnesite aggregate, 10-15 parts of 325 mesh of white fused alumina fine powder, 325 mesh of electric smelting spinelle fine powder
10-18 parts, activity а -3-10 parts of alumina powder, 3-8 parts of 180 mesh of fused magnesite fine powder, 0.5-5 parts of magnalium cementing agent, six partially
0.2-2 parts of sodium phosphate, 0.1-2 parts of yellow starch gum, 0.1-1 parts of carboxymethyl cellulose, 1-5 parts of spent pulping liquor, paper pulp in spent pulping liquor
Specific gravity >=1.25 g/cm3；Mechanical pressing after above-mentioned various raw materials mix in proportion, and it is thermally treated and carbon-free pressed machine brick is made.
2. the carbon-free pressed machine brick of ladle wall according to claim 1, it is characterised in that the bauxite clinker: Al2O3Contain
Amount >=88%, bulk density >=3.25g/cm3, Fe2O3Content≤1.5%；Fused white corundum: Al2O3>=98.5%, Fe2O3≤
0.3, Na2O≤0.5, true specific gravity >=3.94 g/cm3；Brown Alundum: Al2O3>=94.5%, Fe2O3≤ 0.3, Si2O≤1.0, very
Specific gravity >=3.80 g/cm3；Alundum: Al2O3>=99.0%, Fe2O3≤ 0.1%, Si2O≤0.2%, bulk density >=3.65
g/cm3。
3. the carbon-free pressed machine brick of ladle wall according to claim 1, it is characterised in that the active а-aluminium oxide is micro-
Powder: average grain diameter≤10 μm；The fused magnesite: content of MgO >=96%, bulk density >=3.4 g/cm3, SiO2Content≤
2.0%, CaO content≤2.0%；325 mesh of electric smelting spinelle fine powder: Al2O3Content 70%-80%, content of MgO 20%-30%.
4. the carbon-free pressed machine brick of ladle wall according to claim 1, it is characterised in that the magnalium cementing agent: Al2O3
Content >=1.5%, content of MgO >=45%, CaO content≤2.0%, SiO2Content≤2.0%；Calgon, P2O5Content >=68%；
Yellow starch gum: cohesive force >=1.5Kg/cm2；Spent pulping liquor, specific gravity >=1.25 g/cm3。
5. the preparation method of the carbon-free pressed machine brick of ladle wall according to claim 1, it is characterised in that:
(1) it is kneaded；It is 1-2 minutes dry-mixed in high speed muller that various aggregates are first weighed in proportion, and it is mixed that spent pulping liquor is then added
Practice 3-5 minutes, adds magnalium cementing agent, calgon, yellow starch gum, carboxymethyl cellulose mixture in blender
Stirring 3-5 minute, be eventually adding formula in remaining fused magnesite fine powder, electric smelting spinelle fine powder, activity а-alumina powder,
White fused alumina fine powder is kneaded 10-15 minutes in the stirring of blender high speed and goes out pug；
(2) green compact；Uniformly mixed pug is added in mold, is pressed into green body on 500-800 tons of friction presses；
(3) it is heat-treated；Qualified green body will be examined to be sent into tunnel drying oven to be heat-treated, dry kiln inlet temperature 80
DEG C -100 DEG C, 180 DEG C -250 DEG C of silicon carbide are kept the temperature, 80 DEG C -100 DEG C of outlet temperature, heat treatment time is not less than 20 hours.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721443A (en) * | 2017-11-01 | 2018-02-23 | 安徽马钢耐火材料有限公司 | A kind of pink fused alumina cementitious matter and preparation method thereof |
| CN110272268A (en) * | 2018-03-17 | 2019-09-24 | 鞍山盛晨耐火材料有限公司 | A kind of preparation method of ladle corundum lining brick |
| CN108546134A (en) * | 2018-03-28 | 2018-09-18 | 江苏苏嘉集团新材料有限公司 | A kind of no carbon brick and preparation method thereof |
| CN109987952A (en) * | 2019-04-25 | 2019-07-09 | 郑州振东科技有限公司 | Spinel ladle heat insulation lining brick |
| CN110451998A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of bottom of steel ladle castable |
| CN112851378A (en) * | 2021-01-23 | 2021-05-28 | 江苏锦耐新材料科技有限公司 | Carbon-free brick for steel ladle and processing method thereof |
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| CN101804456A (en) * | 2010-04-08 | 2010-08-18 | 攀枝花学院 | Carbon-free unburned brick and production method thereof |
| CN101863676A (en) * | 2010-06-18 | 2010-10-20 | 中钢集团洛阳耐火材料研究院有限公司 | Non-carbon residue feather edge brick for refining steel ladle and preparation method thereof |
| CN102329137A (en) * | 2011-07-01 | 2012-01-25 | 上海彭浦特种耐火材料厂 | Carbon-free alumina-magnesia unburned brick and preparation method and application thereof |
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