CN114804846B - Method for preparing cordierite material by using ferrochrome waste residues and cordierite material - Google Patents
Method for preparing cordierite material by using ferrochrome waste residues and cordierite material Download PDFInfo
- Publication number
- CN114804846B CN114804846B CN202210573822.3A CN202210573822A CN114804846B CN 114804846 B CN114804846 B CN 114804846B CN 202210573822 A CN202210573822 A CN 202210573822A CN 114804846 B CN114804846 B CN 114804846B
- Authority
- CN
- China
- Prior art keywords
- ferrochrome
- ball milling
- waste residue
- cordierite
- ferrochrome waste
- 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.)
- Active
Links
Images
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
- C04B35/16—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 silicates other than clay
- C04B35/18—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 silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
-
- 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
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
-
- 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
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
-
- 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
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3239—Vanadium oxides, vanadates or oxide forming salts thereof, e.g. magnesium vanadate
-
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
-
- 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
-
- 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
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to the technical field of cordierite materials, in particular to a method for preparing a cordierite material by utilizing ferrochrome waste residues and the cordierite material. The method provided by the invention comprises the following steps: mechanically activating the ferrochrome waste residue to obtain activated ferrochrome waste residue, wherein the particle size D50 of the activated ferrochrome waste residue is not more than 1 mu m; activated ferrochromium waste residue, alumina and AlF 3 And V 2 O 5 Mixing, ball milling, pressing, molding and sintering to obtain the cordierite material. The method provided by the invention not only realizes the large consumption of the ferrochrome waste residue, relieves the harm of the ferrochrome waste residue to the environment, and reduces the waste of resources; meanwhile, a feasible new method is provided for reducing the production cost of cordierite.
Description
Technical Field
The invention relates to the technical field of cordierite materials, in particular to a method for preparing a cordierite material by utilizing ferrochrome waste residues and the cordierite material.
Background
The ferrochrome waste residue (FS) is slag directly discharged by water quenching after high-temperature melting in the process of smelting chromium-containing ferroalloy by a pyrogenic process, belongs to common solid waste and has huge yield. With the accelerated development of the domestic ferrochrome industry, the discharge amount of the ferrochrome waste residue is increased day by day. At present, most of researches on resource utilization of ferrochrome waste residues at home and abroad are concentrated in concrete aggregates, roadbed materials and fillers, and in the aspect of resource utilization of ferrochrome waste residues, most of treatment methods directly utilize physical properties of ferrochrome waste residues and do not realize efficient utilization of internal components, so that the utilization rate is high, but the economic value of utilization products is low. Meanwhile, researches on synthesizing crystal phases such as spinel, cordierite and olivine by using the ferrochrome waste residues partially exist, the researches mainly focus on the research on resource utilization of internal chemical compositions of the ferrochrome waste residues, and the phase composition characteristics of the ferrochrome waste residues are generally ignored, so that the utilization rate of the ferrochrome waste residues is low.
The ferrochromium waste residue mainly contains SiO 2 、Al 2 O 3 MgO has chemical conditions for synthesizing the magnesium-aluminum-silicon crystal, but the magnesium-aluminum-silicon crystal has phase characteristics of high glass phase due to a treatment means of water quenching and rapid cooling in the production process, and the main compositions of the ferrochrome waste slag are researched to be about 70% of glass phase and 30% of spinel phase. Therefore, most SiO in the ferrochrome slag 2 、Al 2 O 3 MgO is present in the internal glass phase in an amorphous form. And earlier experimental researches find that the internal phase composition of the ferrochrome waste residue calcined at 1250-1350 ℃ is not obviously changed, and a large amount of glass phase also causes the calcined ferrochrome waste residue to have obvious overburning behavior, which shows that the activation energy of the internal glass phase and the crystal phase participating in solid-phase reaction is higher, and the solid-liquid phase change of the internal glass phase at high temperature can not be promoted only by calcination treatment.
Therefore, how to realize high conversion rate of cordierite crystals and obtain cordierite materials with lower thermal expansion coefficient and higher strength while realizing high doping amount of ferrochrome waste residue is urgent to realize the high economic value resource utilization of ferrochrome waste residue.
Disclosure of Invention
The invention aims to overcome the problems and provide a method for preparing a cordierite material by using ferrochrome waste residues and the cordierite material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing cordierite materials by utilizing ferrochrome waste residues comprises the following steps:
1) Mechanically activating the ferrochrome waste residue to obtain activated ferrochrome waste residue, wherein the particle size D50 of the activated ferrochrome waste residue is not more than 1 mu m;
2) Activated ferrochromium waste residue, alumina and AlF 3 And V 2 O 5 Mixing, ball milling, pressing, molding and sintering to obtain the cordierite material.
Preferably, the activated ferrochromium waste residue, alumina and AlF 3 And V 2 O 5 The mass ratio of (85-92): (2-8): (1-3): (1-4).
Preferably, the mechanical activation is performed by adopting a wet ball milling mode, the ball milling rotation speed is 250-400r/min, and the ball milling time is 36-50h.
Preferably, the particle size D50 of the activated ferrochromium waste residue is 0.1-1 μm.
Preferably, the mass ratio of the materials, the ball mill and the water in the wet ball milling is 1 (1.5-2) to 0.6-1.2; it will be understood that the material is referred to herein as ferrochrome slag.
Preferably, the ball mill adopts a zirconia ball mill with the diameter of 0.3-0.4mm and a zirconia ball mill with the diameter of 0.8-1 mm;
preferably, the mass ratio of the zirconia ball mill with the diameter of 0.3-0.4mm to the zirconia ball mill with the diameter of 0.8-1mm is 1: (1.5-2).
Preferably, before the mechanical activation of the ferrochrome waste residue is carried out in the step 1), the method also comprises a step of carrying out ball milling homogenization on the ferrochrome waste residue, preferably, the particle size D50 of the ferrochrome waste residue after ball milling homogenization is less than or equal to 50 μm, and preferably, the particle size of the ferrochrome waste residue after ball milling homogenization is 40-50 μm.
Preferably, the ball milling in the step 2) is dry ball milling, the ball milling rotating speed is 300-400r/min, and the ball milling time is 0.5-1h;
the step 2) of sieving the mixture after ball milling is also included after ball milling; further preferably, the number of the sieving meshes is 325 to 400 meshes.
Preferably, the ball milling medium of the dry ball milling is alumina ball mill, the mass ratio of the material balls is 1 (1.5-2), and the material ball mass ratio is understood to be activated ferrochrome waste residue, alumina and AlF 3 And V 2 O 5 Total mass of (2) and mass of alumina ball millAnd (4) the ratio.
Preferably, the firing step is carried out in an oxidizing atmosphere, the firing temperature is 1250-1300 ℃, and the heat preservation time is 0.5-4h.
Preferably, the ferrochrome waste residue comprises the following components in percentage by mass: 27-37% of SiO 2 、16-32％Al 2 O 3 、1-5％Fe 2 O 3 、3-9％Cr 2 O 3 、1-5％CaO、18-36％MgO、＜1％Na 2 O、＜1％SO 3 And ignition loss of less than 3 percent. It is to be noted that the ferrochrome slag according to the invention may comprise, in addition to the above components, < 1% potassium oxide, and/or < 1% TiO 2 And/or < 1% MnO or MnO 2 。
The invention also provides a cordierite material prepared by the method.
The cordierite material of the present invention has a cordierite crystal content of 75 to 92wt% and an average coefficient of thermal expansion α of 2.1X 10 at 25 to 800 DEG C -6 -3.1×10 -6 The bending strength is 40-55MPa.
The invention has the beneficial effects that:
the method for preparing cordierite material by using ferrochrome waste residue provided by the invention comprises the steps of firstly, mechanically activating the ferrochrome waste residue, controlling the particle size D50 of the activated ferrochrome waste residue to be not more than 1 mu m, enabling the ferrochrome waste residue to be high-energy powder, improving the crystal defects in the ferrochrome waste residue to promote the internal crystal phase transformation, simultaneously reducing the activation energy of glass phase crystallization reaction, providing a kinetic basis for realizing the high-efficiency transformation of the internal crystals and the glass phase, and then, carrying out the activation on the activated ferrochrome waste residue, alumina and AlF 3 And V 2 O 5 Ball milling is carried out after mixing, alumina is introduced to generate an aluminum-rich glass phase with higher viscosity near crystal grain boundaries in ferrochrome waste residues so as to promote generation of cordierite crystal nuclei, chemical conditions of crystallization reaction are provided, and a mineralizer AlF is introduced 3 、V 2 O 5 Reducing the reaction temperature of the solid phase reaction of the internal crystal and the crystallization reaction of the glass phase, promoting the growth and development of the crystal, and promoting the glass phase in the ferrochrome waste residue through the mutual matching of the steps of pressing, forming and sinteringThe phase change reaction of the crystal phase is used for synthesizing a cordierite phase, so that the resource utilization of the high doping amount of the ferrochrome waste residue is finally realized, the high-performance cordierite material is prepared by taking the ultrahigh doping amount of the ferrochrome waste residue as a basic raw material, and the prepared cordierite material has more excellent strength, lower thermal expansion coefficient and higher content of cordierite crystals.
The content of the ferrochrome waste residue of the cordierite material prepared by the method can reach 85-92 percent, the content of cordierite crystals can reach 75-92wt percent, and the cordierite material with higher economic value is synthesized by efficiently utilizing the ferrochrome waste residue with low price. Not only realizes the large consumption of the ferrochrome waste residue, relieves the harm of the ferrochrome waste residue to the environment and reduces the waste of resources; meanwhile, a feasible new method is provided for reducing the production cost of cordierite, and waste is really turned into wealth.
The method provided by the invention efficiently utilizes the chemical composition of magnesium, aluminum and silicon in the ferrochrome waste residue for synthesizing cordierite, does not need to use traditional mineral raw materials such as talc, kaolin and the like for synthesizing cordierite, greatly reduces the preparation cost of the material, simultaneously relieves the consumption of mineral resources, and the prepared cordierite low-expansion material with high content of ferrochrome waste residue has the characteristics of environmental friendliness, low price and the like, and has wide market prospect.
The cordierite low-expansion material prepared by the invention has low raw material cost and simple preparation method, can effectively reduce resource waste and environmental pollution caused by solid waste, and provides an ideal new method for resource utilization of high-doping amount of ferrochrome waste residue.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an XRD pattern of a ferrochrome slag used as a raw material in examples and comparative examples of the present invention;
FIG. 2 is an XRD pattern of cordierite materials prepared in examples 2 and 5 of the present invention.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The cordierite crystal content in the following examples or comparative examples was analyzed by semi-quantitative analysis of the phase composition of the sample by the internal standard method of K value and the HighScore Plus software and Rietveld full-spectrum fitting method.
The average thermal expansion coefficient (. Alpha.) at 25 to 800 ℃ of the samples of examples or comparative examples was measured by the ejector method using a PCY2 type thermal expansion instrument manufactured by Hunan instruments Ltd.
The flexural strength values of the test specimens of the examples or comparative examples were determined by means of a three-point bending method using a microcomputer-controlled universal test machine for WDW-20, with a span of 30mm, according to the test standard GB/T4741-1999.
The XRD patterns of the ferrochrome slag raw materials used in the following examples or comparative examples are shown in FIG. 1, wherein the amorphous phase (glass phase) accounts for 71.4wt%, the crystalline phases (spinel and spinel olivine) accounts for 28.6wt%, and the compositions thereof in terms of mass fraction are as follows:
example 1
The embodiment provides a method for preparing a cordierite material by using ferrochrome waste residues, which comprises the following steps:
1) Performing ball milling homogenization on the ferrochrome waste residue until the particle size D50 is 43.4 mu m, and performing mechanical activation pretreatment on the ferrochrome waste residue by adopting wet ball milling, wherein the ball milling speed is 250r/min, and the ball milling time is 42h, wherein the mass ratio of the ferrochrome waste residue to ball mills to water is 1:1.8 Obtaining activated ferrochrome waste residue, wherein the grain diameter D50 of the activated ferrochrome waste residue is 0.987 mu m;
2) 85g of activated ferrochromium waste residue, 8g of alumina and 3g of AlF 3 ，4gV 2 O 5 And (2) performing dry ball milling after mixing, wherein the ball milling rotation speed is 400r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.5, the mixture after ball milling is sieved by a 350-mesh sieve, the mixture is subjected to compression molding, the mixture is subjected to primary firing in an oxygen atmosphere, the firing temperature is 1250 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 81.8% and an average coefficient of thermal expansion α =2.61 × 10 at 25-800 deg.c -6 The flexural strength was 48.3 MPa/. Degree.C.
Example 2
The embodiment provides a method for preparing a cordierite material by using ferrochrome waste residues, which comprises the following steps:
1) Performing ball milling homogenization on the ferrochrome waste residues until the particle size D50 is 43.4 mu m, and performing mechanical activation on the ferrochrome waste residues by adopting wet ball milling, wherein the ball milling rotation speed is 400r/min, and the ball milling time is 50h, wherein the mass ratio of the ferrochrome waste residues, the ball mill and water is 1: 2) Obtaining the activated ferrochrome waste residue, wherein the grain diameter D50 of the activated ferrochrome waste residue is 0.693 mu m;
2) 85g of activated ferrochromium waste residue, 8g of alumina and 3g of AlF 3 ，4gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 300r/min, the ball milling time is 1h, the ball milling medium is alumina ball mill, the mass ratio of material balls is 1:2, the mixture after ball milling is sieved by a 400-mesh sieve, the mixture is pressed and formed, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1300 ℃, the heat preservation time is 4h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 91.4% and an average coefficient of thermal expansion α =2.12 × 10 at 25-800 deg.c -6 The flexural strength was 40.1 MPa/. Degree.C.
Example 3
The embodiment provides a method for preparing a cordierite material by using ferrochrome waste residues, which comprises the following steps:
1) Performing ball milling homogenization on the ferrochrome waste residues until the particle size D50 is 43.4 mu m, and performing mechanical activation on the ferrochrome waste residues by adopting wet ball milling, wherein the ball milling rotation speed is 400r/min, and the ball milling time is 50h, wherein the mass ratio of the ferrochrome waste residues, the ball mill and water is 1: 2) Obtaining the activated ferrochrome waste residue, wherein the grain diameter D50 of the activated ferrochrome waste residue is 0.693 mu m;
2) 92g of activated ferrochromium waste residue, 2g of alumina and 2g of AlF 3 ，4gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 400r/min, the ball milling time is 1h, the ball milling medium is alumina ball mill, the mass ratio of material balls is 1:2, the mixture after ball milling is sieved by a 400-mesh sieve, the mixture is pressed and formed, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1300 ℃, the heat preservation time is 4h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 88.4% and an average coefficient of thermal expansion α =2.27 × 10 at 25-800 deg.c -6 The flexural strength was 42.8 MPa/. Degree.C.
Example 4
The embodiment provides a method for preparing cordierite material by using ferrochrome waste residue, which comprises the following steps:
1) Performing ball milling homogenization on the ferrochrome waste residues until the particle size D50 is 49.8 mu m, and performing mechanical activation on the ferrochrome waste residues by adopting wet ball milling, wherein the ball milling rotation speed is 350r/min, and the ball milling time is 40h, wherein the mass ratio of the ferrochrome waste residues, the ball mill and water is 1: 2) Obtaining the activated ferrochrome waste residue, wherein the grain diameter D50 of the activated ferrochrome waste residue is 0.817 mu m;
2) 89g of activated ferrochrome waste residue, 8g of alumina and 1g of AlF 3 ，2gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 350r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.5, the mixture after ball milling is sieved by a 400-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1275 ℃, the heat preservation time is 2h, and the cordierite material is obtained after natural cooling.
The content of cordierite crystals in the cordierite material is measured to be 83.1%, and the average thermal expansion coefficient alpha =2.63 × 10 at 25-800 DEG C -6 V. C, flexural strength 46.6MPa.
Example 5
The embodiment provides a method for preparing a cordierite material by using ferrochrome waste residues, which comprises the following steps:
1) Performing ball milling homogenization on the ferrochrome waste residues until the particle size D50 is 49.8 mu m, and performing mechanical activation on the ferrochrome waste residues by adopting wet ball milling, wherein the ball milling rotation speed is 300r/min, and the ball milling time is 36h, wherein the mass ratio of the ferrochrome waste residues, the ball mill and water is 1.8: 1.5 Obtaining activated ferrochrome waste residue, wherein the grain diameter D50 of the activated ferrochrome waste residue is 0.947 mu m;
2) 92g of activated ferrochromium waste residue, 6g of alumina and 1g of AlF 3 ，1gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 350r/min, the ball milling time is 0.5h, the ball milling medium is alumina ball mill, the mass ratio of material balls is 1:2, the mixture after ball milling is sieved by a 325-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1250 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 75.3% and an average coefficient of thermal expansion α =3.08 × 10 at 25-800 deg.C -6 The bending strength is 55.0MPa at/° C.
Example 6
The embodiment provides a method for preparing a cordierite material by using ferrochrome waste residues, which comprises the following steps:
1) Performing ball milling homogenization on the ferrochrome waste residues until the particle size D50 is 49.8 mu m, and performing mechanical activation on the ferrochrome waste residues by adopting wet ball milling, wherein the ball milling rotation speed is 280r/min, and the ball milling time is 44h, wherein the mass ratio of the ferrochrome waste residues, the ball mill and water is 1.5: 1.5 Obtaining activated ferrochrome waste residue, wherein the grain diameter D50 of the activated ferrochrome waste residue is 0.956 mu m;
2) 92g of activated ferrochromium waste residue, 4g of alumina and 1g of AlF 3 ，3gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 300r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.8, the mixture after ball milling is sieved by a 325-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1300 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The content of cordierite crystal in the cordierite material is determined to be 76.7%, and the average thermal expansion coefficient alpha =2.94 multiplied by 10 at 25-800 DEG C -6 The flexural strength was 54.4 MPa/deg.C.
Comparative example 1
The comparative example provides a method for preparing a cordierite material by using ferrochrome waste residues, which comprises the following steps:
1) Carrying out ball milling and homogenization on the ferrochrome waste residue until the particle size D50 is 43.4 mu m, thus obtaining the ferrochrome waste residue;
2) 85g of ferrochrome waste residue obtained in the step 1), 8g of alumina and 3g of AlF 3 ，4gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 400r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.5, the mixture after ball milling is sieved by a 350-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1250 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 63.6% and an average coefficient of thermal expansion α =3.73 × 10 at 25-800 deg.c -6 The flexural strength was 34.6 MPa/deg.C.
Comparative example 2
This comparative example provides a process for the preparation of cordierite material from ferrochrome waste residue, which differs from example 1 in that: in the step 2), 85g of activated ferrochrome waste residue and 3g of AlF 3 ，4gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 400r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.5, the mixture after ball milling is sieved by a 350-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1250 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 56.3% and an average coefficient of thermal expansion α =4.12 × 10 at 25-800 deg.C -6 V. C, the flexural strength is 37.2MPa.
Comparative example 3
This comparative example provides a process for the preparation of cordierite material from ferrochrome waste residue, which differs from example 1 in that: in the step 2), 85g of activated ferrochrome waste residue, 8g of alumina and 4gV 2 O 5 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 400r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.5, the mixture after ball milling is sieved by a 350-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1250 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The cordierite material was determined to have a cordierite crystal content of 68.9% and an average coefficient of thermal expansion α =3.67 × 10 at 25-800 deg.C -6 The flexural strength was 33.4 MPa/. Degree.C.
Comparative example 4
This comparative example provides a process for the preparation of cordierite material from ferrochrome waste residue, which differs from example 1 in that: in the step 2), 85g of activated ferrochrome waste residue, 8g of alumina and 3g of AlF 3 And (2) carrying out dry ball milling after mixing, wherein the ball milling rotation speed is 400r/min, the ball milling time is 0.5h, the ball milling medium is an alumina ball mill, the mass ratio of material balls is 1.5, the mixture after ball milling is sieved by a 350-mesh sieve, the mixture is pressed and molded, the mixture is sintered for one time in an oxygen atmosphere, the sintering temperature is 1250 ℃, the heat preservation time is 0.5h, and the cordierite material is obtained after natural cooling.
The content of cordierite crystals in the cordierite material is 71.3%, and the average thermal expansion coefficient alpha =3.46 × 10 at 25-800 ℃ is determined -6 The flexural strength was 31.6 MPa/deg.C.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (14)
1. A method for preparing cordierite material by utilizing ferrochrome waste slag is characterized by comprising the following steps:
1) Mechanically activating the ferrochrome waste residue to obtain activated ferrochrome waste residue, wherein the particle size D50 of the activated ferrochrome waste residue is not more than 1 mu m;
2) Activated ferrochromium waste residue, alumina and AlF 3 And V 2 O 5 Mixing, ball milling, press forming and sintering to obtain cordierite material;
the activated ferrochrome waste residue, alumina and AlF 3 And V 2 O 5 The mass ratio of (85-92): (2-8): (1-3): (1-4);
the cordierite material has a cordierite crystal content of 75 to 92wt% and an average coefficient of thermal expansion alpha of 2.1X 10 at 25 to 800 DEG C -6 -3.1×10 -6 The bending strength is 40-55MPa.
2. The method for preparing cordierite material from ferrochrome waste residue as claimed in claim 1, wherein the mechanical activation is performed in the form of wet ball milling, the rotating speed of the ball milling is 250-400r/min, and the ball milling time is 36-50h.
3. The method for preparing cordierite material from ferrochrome waste slag according to claim 2, wherein the mass ratio of materials, ball mill and water in the wet ball milling is 1 (1.5-2) to (0.6-1.2).
4. The method for preparing cordierite material from ferrochrome waste slag according to claim 3,
the ball mill adopts a zirconia ball mill with the diameter of 0.3-0.4mm and a zirconia ball mill with the diameter of 0.8-1 mm.
5. The method for preparing cordierite material from ferrochrome waste slag according to claim 4, wherein the ferrochrome waste slag is provided with a slag-like coating,
the mass ratio of the zirconia ball mill with the diameter of 0.3-0.4mm to the zirconia ball mill with the diameter of 0.8-1mm is 1: (1.5-2).
6. The method for preparing cordierite material from ferrochrome waste residue according to claim 1, wherein the step 1) further comprises a step of performing ball milling homogenization on the ferrochrome waste residue before the mechanical activation of the ferrochrome waste residue.
7. The method for preparing cordierite material from ferrochrome waste slag according to claim 6,
the grain diameter D50 of the ferrochrome waste residue after ball milling and homogenization is less than or equal to 50 mu m.
8. The method for preparing cordierite material from ferrochrome waste slag according to claim 7, wherein the ferrochrome waste slag is a molten slag,
the grain diameter D50 of the ferrochromium waste residue after ball milling and homogenization is 40-50 μm.
9. The method for preparing cordierite materials from ferrochrome waste residues according to claim 1, wherein the ball milling in the step 2) is dry ball milling, the rotating speed of the ball milling is 300-400r/min, and the ball milling time is 0.5-1h;
the step 2) of sieving the mixture after ball milling is also included after ball milling.
10. The method for preparing cordierite material from ferrochrome waste slag according to claim 9,
the dry ball milling medium is an alumina ball mill, and the mass ratio of material balls is 1 (1.5-2).
11. A method of producing a cordierite material from ferrochrome slag according to claim 1, wherein the firing step is carried out in an oxidizing atmosphere at 1250-1300 ℃ for 0.5-4 hours.
12. The method for preparing cordierite material from ferrochrome waste residue according to claim 1, wherein the composition of the ferrochrome waste residue comprises, in terms of mass fraction: 27-37% of SiO 2 、16-32％Al 2 O 3 、1-5％Fe 2 O 3 、3-9％Cr 2 O 3 、1-5％CaO、18-36％MgO、＜1％Na 2 O、＜1％SO 3 And ignition loss of less than 3 percent.
13. A cordierite-based material produced by the method of any one of claims 1-12.
14. The cordierite material of claim 13, wherein the cordierite crystal content in the cordierite material is 75 to 92wt% and the average coefficient of thermal expansion α at 25 to 800 ℃ is 2.1 x 10 -6 -3.1×10 -6 The bending strength is 40-55MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210573822.3A CN114804846B (en) | 2022-05-24 | 2022-05-24 | Method for preparing cordierite material by using ferrochrome waste residues and cordierite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210573822.3A CN114804846B (en) | 2022-05-24 | 2022-05-24 | Method for preparing cordierite material by using ferrochrome waste residues and cordierite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114804846A CN114804846A (en) | 2022-07-29 |
| CN114804846B true CN114804846B (en) | 2022-12-13 |
Family
ID=82516510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210573822.3A Active CN114804846B (en) | 2022-05-24 | 2022-05-24 | Method for preparing cordierite material by using ferrochrome waste residues and cordierite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114804846B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2057099C1 (en) * | 1994-05-10 | 1996-03-27 | Анатолий Васильевич Левченко | Source mix for manufacture of lime-and-sand brick |
| CN106396637A (en) * | 2016-09-06 | 2017-02-15 | 景德镇陶瓷大学 | Light low-expansion porcelain building ceramic tile and preparation method thereof |
| CN107140945A (en) * | 2017-05-21 | 2017-09-08 | 景德镇陶瓷大学 | It is a kind of to utilize the compound high strength porcelain architectural pottery Antique Imitation Tiles prepared of two kinds of waste residues |
| CN107973586A (en) * | 2017-11-23 | 2018-05-01 | 江苏省冶金设计院有限公司 | Handle the method and Ceramic Tiles of ferrochrome slag |
| CN114014684A (en) * | 2021-11-12 | 2022-02-08 | 西南科技大学 | High-performance lightweight aggregate with gradient pore structure and preparation method thereof |
-
2022
- 2022-05-24 CN CN202210573822.3A patent/CN114804846B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2057099C1 (en) * | 1994-05-10 | 1996-03-27 | Анатолий Васильевич Левченко | Source mix for manufacture of lime-and-sand brick |
| CN106396637A (en) * | 2016-09-06 | 2017-02-15 | 景德镇陶瓷大学 | Light low-expansion porcelain building ceramic tile and preparation method thereof |
| CN107140945A (en) * | 2017-05-21 | 2017-09-08 | 景德镇陶瓷大学 | It is a kind of to utilize the compound high strength porcelain architectural pottery Antique Imitation Tiles prepared of two kinds of waste residues |
| CN107973586A (en) * | 2017-11-23 | 2018-05-01 | 江苏省冶金设计院有限公司 | Handle the method and Ceramic Tiles of ferrochrome slag |
| CN114014684A (en) * | 2021-11-12 | 2022-02-08 | 西南科技大学 | High-performance lightweight aggregate with gradient pore structure and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 烧成温度对铬铁渣性能影响与表征;邱柏欣等;《矿产综合利用》;20200131(第1期);第188-193、162页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114804846A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tchakouté et al. | Synthesis of sodium waterglass from white rice husk ash as an activator to produce metakaolin-based geopolymer cements | |
| CN111620679B (en) | Method for preparing high-purity mullite material by taking fused silica as silicon source | |
| CN107954732B (en) | Cordierite-forsterite sagger, preparation method and application thereof | |
| CN106187289A (en) | A kind of method utilizing nickel slag and biomass powder to prepare light foamed ceramic | |
| CN108503224B (en) | Microcrystalline glass using coal gangue and rice hull ash as main raw materials and preparation method thereof | |
| CN107793128A (en) | Low expansion ceramic blank and its preparation method and application | |
| WO2024183244A1 (en) | Method for preparing refractory material from secondary aluminum ash | |
| CN103626481A (en) | Preparation method for synthesizing cordierite material by use of waste ceramic rollers | |
| CN114656256B (en) | Piezoelectric composite material prepared from titanium-containing ore and method thereof | |
| CN114988894A (en) | Light thermal shock-resistant mullite cordierite rotary tube and preparation method thereof | |
| CN114804846B (en) | Method for preparing cordierite material by using ferrochrome waste residues and cordierite material | |
| CN105036167A (en) | Calcium hexaluminate and preparation method thereof | |
| CN110066114B (en) | Method for preparing transparent glass ceramic with adjustable color by utilizing silicomanganese slag | |
| CN114751727B (en) | Preparation method of compact anorthite refractory material | |
| CN107963900B (en) | Composite sagger, preparation method and application thereof | |
| CN100486698C (en) | Composite phase-change catalyst for preparing quartz and use | |
| CN114455930B (en) | Preparation method of dolomite composite material | |
| CN112500182B (en) | Preparation method for in-situ synthesis of mullite whisker ceramic material | |
| CN110128163A (en) | A method of porous cordierite ceramics material is prepared using waste catalyst | |
| CN113943502A (en) | Method for preparing infrared coating paint by utilizing metallurgical solid wastes | |
| CN117886588A (en) | Tailing composite cordierite-based far infrared emission ceramic and preparation method and application thereof | |
| CN113755045B (en) | Infrared radiation coating and preparation method thereof | |
| CN114315382B (en) | Magnesia-alumina spinel prepared by electric melting of hydrated magnesia-alumina bricks and preparation method thereof | |
| CN116462521B (en) | Method for preparing lightweight heat-insulating refractory castable from residues generated in production of magnesium hydroxide by bischofite | |
| CN115521156B (en) | Preparation method of ceramic sagger for lithium battery anode material |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |