CN107162572A - A kind of castable aggregate and preparation method thereof - Google Patents

A kind of castable aggregate and preparation method thereof Download PDF

Info

Publication number
CN107162572A
CN107162572A CN201710357311.7A CN201710357311A CN107162572A CN 107162572 A CN107162572 A CN 107162572A CN 201710357311 A CN201710357311 A CN 201710357311A CN 107162572 A CN107162572 A CN 107162572A
Authority
CN
China
Prior art keywords
aggregate
shell
castable
slurry
raw material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710357311.7A
Other languages
Chinese (zh)
Inventor
宋雅楠
赵义
陈荣荣
马铮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Self-Reliance New Materials Ltd By Share Ltd
Original Assignee
Zhejiang Self-Reliance New Materials Ltd By Share Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Self-Reliance New Materials Ltd By Share Ltd filed Critical Zhejiang Self-Reliance New Materials Ltd By Share Ltd
Priority to CN201710357311.7A priority Critical patent/CN107162572A/en
Publication of CN107162572A publication Critical patent/CN107162572A/en
Pending legal-status Critical Current

Links

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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62802—Powder coating materials
    • C04B35/62805—Oxide ceramics
    • C04B35/6281—Alkaline earth metal oxides
    • 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
    • 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
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • 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
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • 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
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
    • 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
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3229—Cerium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • 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
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention discloses a kind of castable aggregate and preparation method thereof, the aggregate is mainly made up of three parts, i.e. shell, core and transition zone.Because the raw material of selection is different, it is prepared into particles of aggregates also can difference.Mainly using magnesia particle as carrier in the present invention, prepared by adhering to different substrates.Preparation method mainly has following steps：In the one or more oxides of magnesia particle surface attachment such as Cr2O3、Al2O3、ZrO2、TiO2、Fe2O3Deng or Y2O3、Ce2O3、La2O3The slurry prepared Deng the different oxides such as rare-earth oxide, then burns till 3~10h through 1100 DEG C~1900 DEG C high temperature, and obtaining has high-strength erosion-resistant aggregate.The features such as aggregate that the present invention is provided has stable performance, abundant raw material, can rationally and effectively save raw material, reduce castable cost, lift castable performance.

Description

A kind of castable aggregate and preparation method thereof
Technical field
The present invention relates to fire resisting material field, and in particular to a kind of castable aggregate and preparation method thereof.
Background technology
Refractory material is the indispensable material of human use's heat energy institute, is widely used in steel and Non-ferrous Metallurgy The industry such as industry, machine building industry, building materials industry, ceramics, glass industry, chemistry and petroleum industry, electronics industry and kiln. In unshape refractory, aggregate accounts for nearly 70% ratio, and usage amount is very big, and the use of most of unshape refractory Environment temperature is up to more than 1500 DEG C, it is necessary to using the higher high-purity aggregate of refractoriness, such as plate diamond spar, fused white corundum Deng due to current energy-conserving and environment-protective, the opening of the new policy such as resources conservation so that a large amount of cost of material progressively raise up, and exploitation is new Type raw material has become at present inevitably trend.
With the continuous propulsion that steel industry is energy-saving, raw material lightweight turns into a new developing direction.Consider World's ore reserve of magnesia are huge, cheap, and bulk density easily occurs high less than raw materials such as plate diamond spar, electro-corundums Warm reaction expansion is big, Yishui River problems of crack, and it is desirable to develop a kind of performance stabilization, bulk density using magnesia as carrier Low new aggregate, while accomplishing resources conservation, cost reduction and performance optimization etc..
The content of the invention
The invention provides a kind of castable aggregate and preparation method thereof, the aggregate properties are stable, bulk density is low, Performance is superior, abundant raw material, can effectively save raw material, reduces castable cost, optimizes castable performance.
A kind of castable aggregate, the aggregate is core shell structure, and its center is magnesia particle, and shell is Cr2O3、 Al2O3、ZrO2、TiO2、Fe2O3, at least one of rare-earth oxide, it is former with shell for magnesia particle between core and shell Material reacts the transition zone of generation at high temperature.
The aggregate that the present invention is provided is approximately core shell structure, and different materials are respectively adopted from shell in core, and between core and shell Transition is carried out by transition zone, graded is presented in chemical composition and thing phase composition.
Shell uses oxide, and oxide is Cr2O3、Al2O3、ZrO2、TiO2、Fe2O3, in rare-earth oxide one Plant or a variety of.
Preferably, if shell uses a kind of material, shell is Cr2O3、ZrO2、TiO2、Fe2O3, rare-earth oxide In one kind；If shell uses at least two materials, shell is Cr2O3、Al2O3、ZrO2、TiO2、Fe2O3, rare-earth oxide In at least two.Two kinds of different rare-earth oxides are considered two kinds of materials.
Preferably, if shell uses at least two materials, one of which is Al2O3, remaining is Cr2O3、ZrO2、TiO2、 Fe2O3, at least one of rare-earth oxide.
Preferably, the rare-earth oxide uses Y2O3、Ce2O3、La2O3。
The bulk density of the aggregate is relatively small, can effectively reduce refractory material weight, mitigates operation pressure, reduction Use cost.
Preferably, bulk density≤3.5g/cm of the magnesia particle3。
Preferably, the high temperature is 1100 DEG C~1900 DEG C.At high temperature, the MgO in magnesia particle and shell raw material The oxide reaction of use, generates transition zone.Temperature is different and different according to shell raw material, and selected temperature at least ensures MgO Can occur oxidation reaction with shell raw material.
In the reaction time at high temperature, it is adjusted according to shell raw material and required aggregate performance difference.
The property of transition zone is all different from core and shell, and effective connection on the one hand can be played to core and shell and is made With；On the other hand, the performance of aggregate can also be optimized, transition zone and shell primarily form the solid solution such as spinelle, according to different Occasion demand can be used in different regions, while solid solution exists as complex phase, material can be improved to a certain extent Thermal shock resistance.
Present invention also offers a kind of described castable aggregate processing method, comprise the following steps：
Shell raw material slurry is covered on magnesia particle surface, 3~10h is burnt till at a temperature of 1100 DEG C~1900 DEG C, obtains Described aggregate.
The particle diameter of magnesia particle is selected as needed, for example, 15-10mm, 10-5mm, 5-3mm or other desired Size distribution, the chemical composition of the magnesia：MgO >=90%, SiO2≤ 4.5%, CaO≤2.0%, cut down according to the circumstance≤0.40%.
Described cover can be using modes such as hanging, coating or turbine stirrings.It is described burn till can in saggar tunnel cave or Carried out in rotary kiln.
In order to improve the surface-active of magnesia particle, it is preferable that activation process is passed through on the surface of the magnesia particle.It is described Activation process is at least one of in the following ways：
A, the surface roughness for improving magnesia particle；
B, reduction prepare firing temperature during magnesia particle.
The surface roughness of magnesia particle can be reduced by the way of mechanical grinding by improving surface roughness, improve magnesium The surface-active of sand particle.
Reduction prepares firing temperature during magnesia particle, can increase the quantity of active group on magnesia particle, improves magnesium The surface-active of sand particle.
Preferably, the magnesia particle particle diameter >=0.5mm.
Obtained preferably, the slurry is dispersed in water by shell material powder.
The particle diameter of shell material powder be difficult it is excessive, preferably, at least 90% mass point in the shell material powder Several powders can pass through 325 mesh (Taylor system) screen cloth.
The particle diameter of shell material powder is small, can increase specific surface area, increase and MgO reaction probabilities.Preferably, institute The mass fraction for stating shell material powder in shell raw material slurry is 15~60%.
On the one hand the concentration of shell raw material slurry influence the effect of hanging, on the other hand can also influence the shell after burning till Phase structure.Further preferably, the mass fraction of shell material powder is 30~60% in shell raw material slurry.Further preferably, shell The mass fraction of shell material powder is 30~50% in layer raw material slurry.
Preferably, the attachment thickness of the magnesia particle surface crust raw material slurry is 0.1~5mm.Further preferably, The attachment thickness of the magnesia particle surface crust raw material slurry is 0.5~4mm.Further preferably, the magnesia particle surface crust The attachment thickness of raw material slurry is 1~3mm.
The thickness that covers of shell raw material slurry directly affects and burns till the thing phase developmental state that rear core-shell structure respectively constitutes position, Therefore, coating thickness need it is suitable, can be according to coating thickness being adjusted the need for actual use, to meet different occasions Performance requirement.
The castable aggregate that the present invention is provided, property is stable, bulk density is low, performance is superior, raw material ore reserve Greatly, raw material can be effectively saved, castable cost is reduced, optimizes castable performance.
Brief description of the drawings
Fig. 1 is the structural representation of castable aggregate of the present invention；
Fig. 2 a are sample C6 anti-slag result photo；
Fig. 2 b are the anti-slag result photo of sample B.
Embodiment
Embodiment 1
A kind of castable aggregate processing method, specific implementation step is as follows：
(1) by Cr2O3Powder and Al2O3Powder is with 1:10 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry Total mass fraction be that the powder of 90% mass fraction in 25%, and whole powder can pass through 325 eye mesh screens.
(2) covered by the way of hanging on magnesia particle surface and contain Cr2O3And Al2O3Slurry, i.e., by magnesia particle It is immersed in slurry, stop is taken out in a moment, and wrapping one layer on magnesia particle surface contains Cr2O3And Al2O3Slurry, slurry The thickness of layer is about 0.8mm.
(3) Cr will be wrapped with2O3And Al2O3The magnesia particle of layer of slurry is placed in saggar, tunnel cave and burnt till at a temperature of 1750 DEG C 5h, that is, obtain aggregate.
Performance characterization
Chemical composition is detected
As shown in figure 1, aggregate is divided into three layers in the present embodiment, core c, transition zone b and shell a are followed successively by from the inside to the outside, its In, shell mainly plays the erosion-resistant protective effect of anti-slag to core, and transition zone is mainly the blending constituent of core and shell, played Transitional function is wrapped up core.By the separation of core, transition zone and shell, chemical detection, the testing result such as institute of table 1 are carried out respectively Show.
Table 1
Core is typical magnesia aggregate chemical composition, and transition zone is magnesia, aluminum oxide and chromium oxide, and shell is mainly oxygen Change magnesium, aluminum oxide and chromium oxide.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result As shown in table 2.
Table 2
Core is typical magnesia mineral facies periclase, and shell is Mg-Al-Cr spinel solid solution, and the principal crystalline phase of transition zone is Mg-Al-Cr spinel.
Core, transition zone, shell have different chemical composition and thing phase composition, show different performances.
Embodiment 2
A kind of castable aggregate processing method, specific implementation step is as follows：
(1) by Cr2O3Powder, which is dispersed in water, is configured to slurry, Cr in slurry2O3The mass fraction of powder is 25%, and Cr2O3The powder of 90% mass fraction can pass through 325 eye mesh screens in powder.
(2) Cr is covered on magnesia particle surface by the way of hanging2O3Magnesia particle, i.e., be immersed in slurry by slurry, Stop is taken out in a moment, and one layer of Cr is wrapped on magnesia particle surface2O3Slurry, the thickness of layer of slurry is about 0.8mm.
(3) Cr will be wrapped with2O3The magnesia particle of layer of slurry is placed in saggar, tunnel cave and burns till 5h at a temperature of 1750 DEG C, produces To aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively Row chemical detection, testing result is as shown in table 3.
Table 3
Core is typical magnesia aggregate chemical composition, and transition zone is mainly magnesia and aluminum oxide chromium, and shell is mainly oxygen Change magnesium and aluminum oxide chromium.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result As shown in table 4.
Table 4
Core is typical magnesia mineral facies periclase, and transition zone principal crystalline phase is magnesia chrome spinel and periclase, and shell is magnesium Picotite.
Embodiment 3
A kind of castable aggregate processing method, specific implementation step is as follows：
(1) by ZrO2Powder and Al2O3Powder is with 1:10 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry Total mass fraction be that the powder of 90% mass fraction in 25%, and whole powder can pass through 325 eye mesh screens.
(2) covered by the way of hanging on magnesia particle surface and contain ZrO2And Al2O3Slurry, i.e., by magnesia particle It is immersed in slurry, stop is taken out in a moment, and wrapping one layer on magnesia particle surface contains ZrO2And Al2O3Slurry, layer of slurry Thickness be about 0.8mm.
(3) ZrO will be wrapped with2And Al2O3The magnesia particle of layer of slurry is placed in saggar, tunnel cave
5h is burnt till at a temperature of 1750 DEG C, that is, obtains aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively Row chemical detection, testing result is as shown in table 5.
Table 5
Core is typical magnesia aggregate chemical composition, and transition zone is mainly magnalium Zirconium oxide, and shell is mainly magnesium-aluminum-zirconium Oxide.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result As shown in table 6.
Table 6
Core is typical magnesia mineral facies periclase, and the principal crystalline phase of transition zone is magnalium zirconium spinel and magnesium aluminate spinel, Shell is mainly magnalium zirconium spinel and magnesium aluminate spinel, also small amounts aluminium and zirconium oxide.
Embodiment 4
A kind of castable aggregate processing method, specific implementation step is as follows：
(1) by TiO2Powder and Al2O3Powder is with 1:9 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry Total mass fraction is 25%, and the powder of 90% mass fraction can pass through 325 eye mesh screens in whole powders.
(2) covered by the way of hanging on magnesia particle surface and contain TiO2And Al2O3Slurry, i.e., by magnesia particle It is immersed in slurry, stop is taken out in a moment, and wrapping one layer on magnesia particle surface contains TiO2And Al2O3Slurry, layer of slurry Thickness be about 0.8mm.
(3) TiO will be wrapped with2And Al2O3The magnesia particle of layer of slurry is placed in saggar, tunnel cave and burnt till at a temperature of 1750 DEG C 5h, that is, obtain aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively Row chemical detection, testing result is as shown in table 7.
Table 7
Core be typical magnesia chemical composition, transition zone be titanium magnesium aluminum oxide, shell chemical composition be mainly aluminum oxide, Spinelle and titanium oxide.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result As shown in table 8.
Table 8
Core is typical magnesia mineral facies periclase, and the principal crystalline phase of transition zone is spinelle, and shell is spinelle and oxidation Aluminium.
Embodiment 5
A kind of castable aggregate processing method, specific implementation step is as follows：
(1) by Fe2O3Powder and Al2O3Powder is with 1:30 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry Total mass fraction be that the powder of 90% mass fraction in 25%, and whole powder can pass through 325 eye mesh screens.
(2) covered by the way of hanging on magnesia particle surface and contain Fe2O3And Al2O3Slurry, i.e., by magnesia particle It is immersed in slurry, stop is taken out in a moment, and wrapping one layer on magnesia particle surface contains Fe2O3And Al2O3Slurry, slurry The thickness of layer is about 0.8mm.
(3) Fe will be wrapped with2O3And Al2O3The magnesia particle of layer of slurry is placed in saggar, tunnel cave and burnt till at a temperature of 1750 DEG C 5h, that is, obtain aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively Row chemical detection, testing result is as shown in table 9.
Table 9
Core is typical magnesia chemical composition, and transition zone is magnalium ferriferous oxide, and shell chemical composition is mainly magnesium-aluminum-iron Oxide.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result As shown in table 10.
Table 10
Core is typical magnesia mineral facies periclase, and the principal crystalline phase of transition zone is magnesium aluminate spinel, magnalium hercynite, shell Layer is aluminum oxide and magnesium aluminate spinel, magnalium hercynite.
Embodiment 6
A kind of castable aggregate processing method, specific implementation step is as follows：
(1) by La2O3Powder and Al2O3Powder is with 1:30 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry Total mass fraction be that the powder of 90% mass fraction in 25%, and whole powder can pass through 325 eye mesh screens.
(2) covered by the way of hanging on magnesia particle surface and contain La2O3And Al2O3Slurry, i.e., by magnesia particle It is immersed in slurry, stop is taken out in a moment, and wrapping one layer on magnesia particle surface contains La2O3And Al2O3Slurry, slurry The thickness of layer is about 0.8mm.
(3) La will be wrapped with2O3And Al2O3The magnesia particle of layer of slurry is placed in saggar, tunnel cave
5h is burnt till at a temperature of 1750 DEG C, that is, obtains aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively Row chemical detection, testing result is as shown in table 11.
Table 11
Core is typical magnesia chemical composition, and transition zone is magnesia, aluminum oxide and lanthana, and shell chemical composition is main For magnesia, aluminum oxide and lanthana.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result As shown in table 12.
Table 12
Core is typical magnesia mineral facies periclase, and the principal crystalline phase of transition zone is spinelle, and shell is spinelle and α-oxygen Change aluminium.
Comparison study
The weight of each sample is shown in Table in 13, table 14, table 15, table 13, table 14, table 15, bimodal alumina powder Chemical composition：Al2O3>=99.3%, K2O+Na2O≤0.10%；Particle diameter：D50≤ 3.2 μm, D90≤ 10 μm, bimodal distribution；SiO2 The particle diameter of micro mist：D50≤2μm；Additive uses polycarboxylate water-reducer.
As shown in table 13 as the castable of aggregate proportioning using magnesia, this sample is designated as A.
Table 13
As shown in the table as the castable of aggregate proportioning using plate diamond spar, this sample is designated as B.
Table 14
The castable proportioning of the aggregate as the aggregate that are prepared using embodiment 1~6 is as shown in Table 15, specimen coding C1, C2, C3, C4, C5, C6 are respectively that the aggregate prepared using embodiment 1,2,3,4,5,6 makes castable sample.
Table 15
The performance characterization result of sample is as shown in table 16.
Table 16
As can be seen from Table 16, the aggregate prepared using each embodiment can improve the performance of castable, for example, Improve mobility while reduction amount of water, physical property is improved, while can obviously improve castable slag resistance etc..
From the point of view of Fig. 2 a and Fig. 2 b anti-slag result photo comparison, sample C6 slag resistance is substantially better than sample B.

Claims (9)

1. a kind of castable aggregate, it is characterised in that the aggregate is core shell structure, its center is magnesia particle, and shell is Cr2O3、Al2O3、ZrO2、TiO2、Fe2O3, at least one of rare-earth oxide, between core and shell for magnesia particle with Shell raw material reacts the transition zone of generation at high temperature.
2. castable aggregate as claimed in claim 1, it is characterised in that bulk density≤3.5g/ of the magnesia particle cm3。
3. castable aggregate as claimed in claim 1 or 2, it is characterised in that the high temperature is 1100 DEG C~1900 DEG C.
4. a kind of castable as described in any one of claims 1 to 3 aggregate processing method, it is characterised in that including with Lower step：
Shell raw material slurry is covered on magnesia particle surface, 3~10h is burnt till at a temperature of 1100 DEG C~1900 DEG C, obtains described Aggregate.
5. castable as claimed in claim 4 aggregate processing method, it is characterised in that the slurry is by shell raw material powder Body, which is dispersed in water, to be obtained.
6. castable as claimed in claim 4 aggregate processing method, it is characterised in that in the shell material powder extremely The powder of few 90% mass fraction can pass through 325 eye mesh screens.
7. castable as claimed in claim 4 aggregate processing method, it is characterised in that shell in the shell raw material slurry The mass fraction of layer material powder is 15~60%.
8. castable as claimed in claim 4 aggregate processing method, it is characterised in that the magnesia particle surface crust The attachment thickness of raw material slurry is 0.1~5mm.
9. castable as claimed in claim 4 aggregate processing method, it is characterised in that the magnesia particle particle diameter >= 0.5mm。
CN201710357311.7A 2017-05-19 2017-05-19 A kind of castable aggregate and preparation method thereof Pending CN107162572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710357311.7A CN107162572A (en) 2017-05-19 2017-05-19 A kind of castable aggregate and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710357311.7A CN107162572A (en) 2017-05-19 2017-05-19 A kind of castable aggregate and preparation method thereof

Publications (1)

Publication Number Publication Date
CN107162572A true CN107162572A (en) 2017-09-15

Family

ID=59816725

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710357311.7A Pending CN107162572A (en) 2017-05-19 2017-05-19 A kind of castable aggregate and preparation method thereof

Country Status (1)

Country Link
CN (1) CN107162572A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107235718A (en) * 2017-05-19 2017-10-10 浙江自立新材料股份有限公司 It is a kind of for new aggregate of castable and preparation method thereof
CN109369156A (en) * 2018-10-29 2019-02-22 武汉科技大学 A kind of magnesia aggregate and preparation method thereof based on salt lake bittern
US11384021B2 (en) * 2020-02-20 2022-07-12 Refractory Intellectual Property Gmbh & Co. Kg Grains for the production of a sintered refractory product, a batch for the production of a sintered refractory product, a process for the production of a sintered refractory product and a sintered refractory product
CN114929646A (en) * 2020-02-20 2022-08-19 里弗雷克特里知识产权两合公司 Particles for producing sintered refractory products, batch for producing sintered refractory products, method for producing sintered refractory products and sintered refractory products

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103396134A (en) * 2013-07-30 2013-11-20 中冶武汉冶金建筑研究院有限公司 Iron runner casting material using waste alumino-silicon-carbide carbon bricks as aggregate
CN104211420A (en) * 2014-09-15 2014-12-17 武汉科技大学 Light-weight aluminum-magnesium casting material and preparation method thereof
CN105585322A (en) * 2015-12-21 2016-05-18 洛阳利尔耐火材料有限公司 Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof
CN106631072A (en) * 2016-12-29 2017-05-10 浙江自立新材料股份有限公司 Gradient material for castable and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103396134A (en) * 2013-07-30 2013-11-20 中冶武汉冶金建筑研究院有限公司 Iron runner casting material using waste alumino-silicon-carbide carbon bricks as aggregate
CN104211420A (en) * 2014-09-15 2014-12-17 武汉科技大学 Light-weight aluminum-magnesium casting material and preparation method thereof
CN105585322A (en) * 2015-12-21 2016-05-18 洛阳利尔耐火材料有限公司 Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof
CN106631072A (en) * 2016-12-29 2017-05-10 浙江自立新材料股份有限公司 Gradient material for castable and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107235718A (en) * 2017-05-19 2017-10-10 浙江自立新材料股份有限公司 It is a kind of for new aggregate of castable and preparation method thereof
CN109369156A (en) * 2018-10-29 2019-02-22 武汉科技大学 A kind of magnesia aggregate and preparation method thereof based on salt lake bittern
US11384021B2 (en) * 2020-02-20 2022-07-12 Refractory Intellectual Property Gmbh & Co. Kg Grains for the production of a sintered refractory product, a batch for the production of a sintered refractory product, a process for the production of a sintered refractory product and a sintered refractory product
CN114929646A (en) * 2020-02-20 2022-08-19 里弗雷克特里知识产权两合公司 Particles for producing sintered refractory products, batch for producing sintered refractory products, method for producing sintered refractory products and sintered refractory products
CN114945544A (en) * 2020-02-20 2022-08-26 里弗雷克特里知识产权两合公司 Grain for producing sintered refractory product, batch for producing sintered refractory product, method for producing sintered refractory product, and sintered refractory product
CN114945544B (en) * 2020-02-20 2023-11-17 里弗雷克特里知识产权两合公司 Particles for producing a sintered refractory product, batch for producing a sintered refractory product, method for producing a sintered refractory product, and sintered refractory product

Similar Documents

Publication Publication Date Title
CN107162572A (en) A kind of castable aggregate and preparation method thereof
CN106631072B (en) A kind of functionally gradient material (FGM) and preparation method thereof for castable
CN103601507B (en) A kind of complex sintered refractory material of low porosity magnesium aluminate spinel-zirconia corundum zirconia and production technology thereof
CN105481410B (en) A kind of green brick
Ghasemi-Kahrizsangi et al. The impact of ZrSiO4 nanoparticles addition on the microstructure and properties of dolomite based refractories
CN103601521B (en) Low pore periclase-sintered combined refractory material of magnesia alumina spinel-zirconia and production technology thereof
CN105541362B (en) A kind of environmental protection brick
JP5919261B2 (en) Method for producing composite metal oxide, metal oxide sintered body, and rotary kiln
CN107540391B (en) Preparation method of high-strength compact zirconia-forsterite composite material
CN101844928A (en) Magnesia spinel chromium-free brick for RH (ruhrstahl heraeus) vacuum furnace lining and processing method thereof
WO2016118798A1 (en) Refractory bricks and methods of making the same
JP5361795B2 (en) Lined casting material
Jia et al. Slag erosion-resistant coating for periclase-magnesia-aluminum spinel brick
CN107235718A (en) It is a kind of for new aggregate of castable and preparation method thereof
CN109320218A (en) A kind of aluminium zirconium spinel fire proof material brick and preparation method thereof
Singh et al. High alumina castables: A comparison among various sol-gel bonding systems
CN106242598B (en) Inner liner of rotary kiln brick, liner composite brick and its manufacturing method
CN103936448B (en) Method for inhibiting desolvation of zirconia metering nozzle stabilizing agent
CN103951451B (en) The manufacture method of high-strength wearable lining brick
CN112897994A (en) Preparation method of corundum spinel complex phase material
CN104649691A (en) Thermal shock resistant magnesium spinel brick and preparation method thereof
CN108863408A (en) A kind of preparation method of ZrN-SiAlON-SiC-C multiple phase refractory material
CN103964873B (en) Low sintering temperature magnesia zircon brick
WO2021165034A1 (en) Grains for the production of a sintered refractory product, a batch for the production of a sintered refractory product, a process for the production of a sintered refractory product and a sintered refractory product
CN108059453A (en) A kind of coke dry quenching furnace bostle pipe road Mg-Al spinel brick

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20170915