CN110256050A - A kind of pyrolytic semlting magnesium carbonaceous artesian repairing material - Google Patents

A kind of pyrolytic semlting magnesium carbonaceous artesian repairing material Download PDF

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Publication number
CN110256050A
CN110256050A CN201910603159.5A CN201910603159A CN110256050A CN 110256050 A CN110256050 A CN 110256050A CN 201910603159 A CN201910603159 A CN 201910603159A CN 110256050 A CN110256050 A CN 110256050A
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CN
China
Prior art keywords
partial size
raw material
silicon
repairing material
water
Prior art date
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Pending
Application number
CN201910603159.5A
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Chinese (zh)
Inventor
柳军
冯海霞
龙飞虎
郭伟
尚军
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Sinosteel Nanjing Environmental Engineering Technology Research Institute Co.,Ltd.
Sinosteel Luoyang Institute of Refractories Research Co Ltd
Original Assignee
Sinosteel Luoyang Institute of Refractories Research Co Ltd
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Publication date
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Priority to CN201910603159.5A priority Critical patent/CN110256050A/en
Publication of CN110256050A publication Critical patent/CN110256050A/en
Pending legal-status Critical Current

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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
    • 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
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • 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
    • C04B2235/3826—Silicon 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon

Abstract

The present invention discloses a kind of magnesium carbonaceous artesian repairing material of pyrolytic semlting, the magnesium carbonaceous artesian repairing material of disclosed pyrolytic semlting, for raw material, prepares the magnesium carbonaceous gravity flow pouring material that a kind of agglutinating property with self drainage, certain, good resistance to slag and heat-resistant knocking stability etc. are had excellent performance with magnesia, silicon carbide, silicon ash, active carbon, metallic silicon and other additives etc..With at low cost, construction is simple, convenient advantage is repaired, can substantially shorten and smelt the production cycle, realize the purpose of cost efficiency.

Description

A kind of pyrolytic semlting magnesium carbonaceous artesian repairing material
Technical field
The present invention relates to a kind of magnesium carbonaceous artesian repairing materials, and in particular under to pyrolytic semlting (> 1500 DEG C) operating condition Magnesia carbon refractory can realize a kind of gravity flow molding unshape refractory when repairing after.
Background technique
Magnesium carbonaceous system especially magnesium carbon pressed machine brick is due to high temperatures with good slag resistance and heat-resistant knocking stability etc. Can, early it is widely used for the furnace lining material of the steelmaking equipments such as converter, electric furnace.But magnesia (or magnesium carbonaceous) castable is due to applying The disadvantages such as agglutinating property is poor, intensity is low caused by work performance difference and thermal expansion coefficient are high, at the same the easy aquation of magnesia raw material and The amount of water of material caused by after carbon source introducing further increases, and agglutinating property is worse, and the lower problem of the sintering strength of material is more Add and highlights, thus the castable of magnesium carbonaceous did not had the industrial application of scale in high temperature industry always.Industry is universal at present Way is that magnesia carbon brick removes the product more renewed after, and the way not only high production cost, economic well-being of workers and staff is low, and construction period It is long, it affects normal smelt and has enough to meet the need operation.
Summary of the invention
To solve the above problems, the purpose of the present invention is to propose to a kind of pyrolytic semlting magnesium carbonaceous artesian repairing materials.
The present invention adopts the following technical solutions to accomplish the above objectives:
A kind of pyrolytic semlting magnesium carbonaceous artesian repairing material, the raw material and mass percent of magnesium carbonaceous artesian repairing material are as follows:
Magnesia particle 5mm >=partial size > 3mm 15%-20%
Magnesia particle 3mm >=partial size > 1mm 22%-30%
Magnesia particle 1mm >=partial size > 0.1mm 17%-25%
Magnesia powder 88um >=partial size > 74um 20%-30%
Silicon-carbide particle 1.0mm >=partial size > 0.1mm 2%-5%
Carbide fine powder 88um >=partial size > 74um 2%-5%
Metal silicon fine powder 74um >=partial size > 44um 0.5%-3%
Silicon ash 2%-5%
Active carbon D0.9≤ 200um 1%-3%；
The gross mass of raw material described above is 100%；Also outer added with water-reducing agent and water in raw material, the additional amount of the water-reducing agent is The 0.1%-0.3% of total mass of raw material, the additional amount of the water are the 5%-7% of total mass of raw material.
The magnesia particle, magnesia powder be the fused magnesite of MgO >=95% or any one of magnesite clinker or It is compound.
The silicon-carbide particle or fine powder is any one of sic raw material of SiC >=95%.
The carbon source is a kind of active carbon, and the specific surface area of carbon structure is not less than 0.2m2/g。
The water-reducing agent is the compound of a kind of polycarboxylate or polycarboxylate and Quadrafos.
A kind of magnesium carbonaceous material for repairing proposed by the present invention, belongs to one kind of Unshaped Casting Refractories；Present invention utilization Grain research of grade-suit theory matches to design reasonable multistage raw material granularity, while being aided with suitable bonding agent and additive, reaches self weight Acting on lower mixture can flow freely, and have a preferable workability, at the same mixture be still able to maintain preferable uniformity and Applied at elevated temperature performance.
The magnesia added in the present invention has high-melting-point (t as most important raw material in the systemm=2800 DEG C), it is high resistance to The excellent properties that fiery degree (1850 DEG C of T >) and slag-resistant corrode.The silicon carbide introduced in system is also a kind of high-melting-point (tm= 2827 DEG C), high rigidity, low bulk and high thermal conductivity refractory raw material, on the one hand can alleviate and pure high thermally expand being not easy for magnesia material It is sintered, the deficiency of thermal shock resistance difference, while the highly thermally conductive property of raw material itself also can quickly eliminate institute in heat transfer process Bring internal stress improves the heat-resistant knocking stability energy of material, and in addition the non wettability of silicon carbide and most of slags also mentions The high anti-scour property of material.
The silicon ash added in the present invention is a kind of high activity fine silica powder, is on the one hand filled into matrix pores, is risen To amount of water is reduced, the effect of the bulk density and intensity of material is improved；On the other hand MgO-SiO is formed2-H2O Coagulating binding, Assign material certain intensity.
The metallic silicon power added in the present invention is unreacted under the high temperature conditions other than it can make the antioxidant of carbon source Metal melted silicon (tm=1420 DEG C) can also play improve material agglutinating property, thus improve material intensity and anti-thermal shock it is steady It is qualitative.
The active carbon added in the present invention has high-specific surface area, can sufficiently resist the wetability of slag under high temperature, assigns The good anti-scour property of material.The heterogeneous graphitized carbon structure formed in temperature ramp de simultaneously not only has Better antioxygenic property is also convenient for, reinforcing matrix structure, to improve the intensity of material interlaced with other components.
The polycarboxylic acids salt form water-reducing agent that is added in the present invention or its micro mist surface can be made to charge with Quadrafos compound use Form electrostatic repulsion and steric hindrance, fully dispersed micro mist simultaneously plays the role of filling and to improve mixture thixotropic, will be extra Moisture is released from substrate formed aggregate as free water, so that the viscosity for reducing mixture reaches free-flowing Effect.
In conclusion the present invention has a characteristic that
(1) the invention belongs to a kind of magnesium carbonaceous gravity flow pouring materials, have preferable transaction capabilities, have at low cost, construction letter It is single, repair convenient advantage.
(2) silicon carbide and metallic silicon are added in the present invention, further improve the anti-scour property and anti-thermal shock of material Stability.
(3) present invention introduces carbon source be the active carbon with high-specific surface area, have preferable anti-slag wetability, Distinctive heterogeneous carbon structure also acts as reinforcing matrix structure, improves the effect of the strength of materials.
Specific embodiment
The embodiment of the present invention is provided, but does not constitute any limitation of the invention.According to the side in following 3 embodiments Case is dry-mixed 3 ~ 4 minutes first in blender together with aggregate by substrate material (containing water-reducing agent and other outer dopings), then side Stir Bian Jiashui, 4 ~ form castable after five minutes, it is measured from flow valuve and (seeing attached list).If without illustrating that ambient temperature is equal It is 25 DEG C or so.
Embodiment 1:
Mix proportion scheme:
Fused magnesite particle 5mm >=partial size > 3mm 20%
Fused magnesite particle 3mm >=partial size > 1mm 25%
Fused magnesite particle 1mm >=partial size > 0.1mm 19%
Fused magnesite fine powder 88um >=partial size > 74um 20%
Silicon-carbide particle 1.0mm >=partial size > 0.1mm 3%
Carbide fine powder 88um >=partial size > 74um 5%
Metal silicon fine powder 74um >=partial size > 44um 3%
Silicon ash 2%
Active carbon D0.9 ≤ 200um 3%
Polycarboxylate (additional)+0.15%
Calgon (additional)+0.1%
Water (additional)+6.3%；
Embodiment 2:
Mix proportion scheme:
Magnesite clinker particle 5mm >=partial size > 3mm 15%
Magnesite clinker particle 3mm >=partial size > 1mm 30%
Fused magnesite particle 1mm >=partial size > 0.1mm 23%
Fused magnesite fine powder 88um >=partial size > 74um 21%
Silicon-carbide particle 1.0mm >=partial size > 0.1mm 2%
Carbide fine powder 88um >=partial size > 74um 3.5%
Metal silicon fine powder 74um >=partial size > 44um 0.5%
Silicon ash 3%
Active carbon D0.9 ≤ 200um 2%
Polycarboxylate (additional)+0.2%
Water (additional)+6.5%.
Embodiment 3:
Mix proportion scheme:
Magnesite clinker particle 5mm >=partial size > 3mm 16%
Magnesite clinker particle 3mm >=partial size > 1mm 22%
Magnesite clinker particle 1mm >=partial size > 0.1mm 17%
Magnesite clinker fine powder 88um >=partial size > 74um 30%
Silicon-carbide particle 1.0mm >=partial size > 0.1mm 5%
Carbide fine powder 88um >=partial size > 74um 2%
Metal silicon fine powder 74um >=partial size > 44um 2%
Silicon ash 5%
Active carbon D0.9 ≤ 200um 1%
Polycarboxylate (additional)+0.1%
Sodium tripolyphosphate (additional)+0.05%
Water (additional)+7.5%；
Subordinate list explanation:
Table different instances from flow valuve
Project Embodiment 1 Embodiment 2 Embodiment 3
From flow valuve (%) 65-70 70-75 60-65

Claims (5)

1. a kind of magnesium carbonaceous artesian repairing material of pyrolytic semlting, it is characterised in that: the raw material and quality of the artesian repairing material Percentage are as follows:
Magnesia particle 5mm >=partial size > 3mm 15%-20%
Magnesia particle 3mm >=partial size > 1mm 22%-30%
Magnesia particle 1mm >=partial size > 0.1mm 17%-25%
Magnesia powder 88um >=partial size > 74um 20%-30%
Silicon-carbide particle 1.0mm >=partial size > 0.1mm 2%-5%
Carbide fine powder 88um >=partial size > 74um 2%-5%
Metal silicon fine powder 74um >=partial size > 44um 0.5%-3%
Silicon ash 2%-5%
Active carbon D0.9≤ 200um 1%-3%；
The gross mass of raw material described above is 100%；Also outer added with water-reducing agent and water in raw material, the additional amount of the water-reducing agent is The 0.1%-0.3% of total mass of raw material, the additional amount of the water are the 5%-7% of total mass of raw material.
2. a kind of artesian repairing material as described in claim 1, it is characterised in that: the magnesia particle or fine powder be MgO >= Any one of 95% fused magnesite or magnesite clinker are compound.
3. a kind of artesian repairing material as described in claim 1, it is characterised in that: the silicon-carbide particle or fine powder is SiC Any one of >=95% sic raw material.
4. a kind of artesian repairing material as described in claim 1, it is characterised in that: the carbon source is a kind of active carbon, charcoal The specific surface area of structure is not less than 0.2m2/g。
5. a kind of artesian repairing material as described in claim 1, it is characterised in that: the water-reducing agent be a kind of polycarboxylate or Person's polycarboxylate and Quadrafos it is compound.
CN201910603159.5A 2019-07-05 2019-07-05 A kind of pyrolytic semlting magnesium carbonaceous artesian repairing material Pending CN110256050A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115650703A (en) * 2022-11-04 2023-01-31 辽宁利尔镁质合成材料股份有限公司 Magnesium castable and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115650703A (en) * 2022-11-04 2023-01-31 辽宁利尔镁质合成材料股份有限公司 Magnesium castable and preparation method thereof

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