CN111943696A - Method for preparing aluminum titanate refractory material by using industrial aluminum slag and titanium slag - Google Patents

Method for preparing aluminum titanate refractory material by using industrial aluminum slag and titanium slag Download PDF

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Publication number
CN111943696A
CN111943696A CN202010776149.4A CN202010776149A CN111943696A CN 111943696 A CN111943696 A CN 111943696A CN 202010776149 A CN202010776149 A CN 202010776149A CN 111943696 A CN111943696 A CN 111943696A
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slag
industrial
aluminum
aluminum titanate
titanium
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罗旭东
赵嘉亮
齐大彬
祁欣
满奕然
侯庆冬
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University of Science and Technology Liaoning USTL
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University of Science and Technology Liaoning USTL
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B35/46—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 titanium oxides or titanates
    • C04B35/462—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 titanium oxides or titanates based on titanates
    • C04B35/478—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 titanium oxides or titanates based on titanates based on aluminium titanates
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • 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

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  • 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)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention takes industrial aluminum slag and industrial titanium slag as raw materials to prepare the aluminum titanate refractory material with good breaking strength and thermal shock resistance. The industrial aluminum slag and the industrial titanium slag have wide sources and low prices, so that the resources of aluminum oxide and titanium dioxide in the industrial waste slag are comprehensively utilized, the waste is changed into valuable, the land resources and the water resources are protected, the problem of ecological environment pollution is solved, the production cost of an enterprise is reduced, and the added value of a product is provided; the industrial aluminum slag and the industrial titanium slag with small particle size are adopted, so that the reaction activity is higher, the sintering temperature is reduced, and the heat preservation time is shortened; magnesium oxide existing in the industrial aluminum slag can be dissolved in aluminum titanate crystal lattices to form an aluminum titanate solid solution, so that the aluminum titanate is inhibited from being decomposed at low temperature, and the thermal shock resistance of the aluminum titanate is improved.

Description

Method for preparing aluminum titanate refractory material by using industrial aluminum slag and titanium slag
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a method for preparing an aluminum titanate refractory material by using industrial aluminum slag and titanium slag.
Background
The chemical components of the industrial aluminum slag are alumina as a main component, magnesium oxide, silicon dioxide and the like are secondary components, the chemical components are mainly derived from electrolytic alumina production technology and aluminum materials, aluminum die castings and secondary aluminum processes, wherein smelting and casting are indispensable key processes, a large amount of aluminum slag is generated in the processes, the existing aluminum slag treatment mode mainly comprises stacking, waste slag occupies a large amount of land, harmless treatment is not carried out during stacking and landfill, the waste aluminum slag reacts with water to form flammable and explosive gases such as hydrogen and the like, and toxic gases such as ammonia and the like can be formed to pollute atmospheric air. Toxic metal ions in the aluminum slag flow into underground water, so that water resources are polluted and the natural environment is damaged. The patent "a method for recycling aluminum slag ash (CN 200310114041)" calcines the residual aluminum slag ash waste after the aluminum slag is separated and recycled to obtain the raw material of refractory material, so as to achieve the purpose of recycling the aluminum slag ash, and adds ingredients to calcine the aluminum slag ash into high-unit-price ceramic filter material, thereby not only solving the problem of aluminum slag ash treatment, but also effectively reducing the waste of resources and energy sources in the raw material for manufacturing refractory material and the ceramic filter material. The patent "a method for preparing refractory material by using metallurgical furnace slag carbon chromium slag or titanium slag (CN 201210050820)" prepares refractory material by ball milling, burdening, pulping, molding, drying and calcining carbon chromium slag and titanium slag, not only solves the harm of environmental pollution of carbon chromium slag and titanium slag, converts high-valence chromium into low-valence chromium through high-temperature sintering, and integrally solidifies, but also can comprehensively utilize metallurgical furnace slag.
The industrial titanium slag is industrial waste generated in the smelting and developing process of titanium resources, and due to the limitation of ore raw materials and smelting level, a large amount of industrial titanium slag is accumulated like a mountain, and occupies a large amount of land resources. The accumulated industrial titanium slag not only causes pollution to the environment, but also causes serious waste to mineral resources, and simultaneously, the titanium dioxide which is the main chemical component in the titanium slag is not utilized reasonably.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for preparing an aluminum titanate refractory material by using industrial aluminum slag and titanium slag, so that the industrial aluminum slag and industrial titanium slag resources can be efficiently and comprehensively utilized, the resource waste is reduced, the production cost is low, the preparation process is simple, and meanwhile, the prepared aluminum titanate refractory material has certain good breaking strength and thermal shock resistance and can meet the use requirements in the high-temperature fields of cement, ceramics and metallurgy.
A method for preparing an aluminum titanate refractory material by using industrial aluminum slag and titanium slag is characterized by comprising the following steps:
(1) putting 70-90% of industrial aluminum slag powder and 10-30% of industrial titanium slag powder into a mixing roll together by mass percent for co-milling for 1-3h to obtain a mixed material;
(2) pressing the mixed material into material pellets with the diameter of 9-15mm by a ball press machine under the pressure of 2-10 Mpa;
(3) and (3) putting the material pellets into a 1300-1550 ℃ shaft kiln for calcining for 3-8h, and then naturally cooling along with the kiln to obtain the aluminum titanate refractory material.
The granularity of the industrial aluminum slag powder in the step (1) is 20-90 mu m, and the granularity of the industrial titanium slag powder is 20-90 mu m.
In the chemical components of the industrial aluminum slag powder in the step (1), the weight percentages are as follows: al (Al)2O355-75 percent of the content, 5-20 percent of MgO content and TiO in the chemical components of the industrial titanium slag powder2The content is 60-80%.
Compared with the prior art, the invention has the beneficial effects that: 1) the invention adopts the industrial aluminum slag and the industrial titanium slag as raw materials, reduces the problems of random accumulation of industrial waste slag and good land occupation, protects land resources and water resources and solves the problem of ecological environment pollution. Particularly, the loss of precious strategic resources of alumina and titanium dioxide is reduced, so that the titanium dioxide is regenerated into a refractory material with good breaking strength and thermal shock resistance, the waste of resources is changed into valuable, and the method has very important environmental protection benefit and economic benefit; 2) the method for preparing the aluminum titanate refractory material has the advantages of wide raw material source, low price and simple process production, reduces the production cost of enterprises, realizes the sustainable development of the enterprises and provides the added value of products; 3) the invention adopts the industrial aluminum slag and the industrial titanium slag with small granularity, has higher reaction activity, provides energy for reaction sintering, reduces sintering temperature and heat preservation time, and reduces the use amount of enterprise fuels, thereby reducing the production cost of enterprises; 4) in the reaction sintering process, a part of titanium dioxide reacts with alumina to form aluminum titanate, and the other part of titanium dioxide forms a low-melting-point liquid phase at high temperature, exists at grain boundaries among particles, plays a role in bonding, and simultaneously inhibits abnormal growth of grains; 5) magnesium oxide existing in the industrial aluminum slag can be dissolved in aluminum titanate crystal lattices to form an aluminum titanate solid solution, so that the aluminum titanate is inhibited from being decomposed at low temperature, and the thermal shock resistance of the aluminum titanate is improved.
Drawings
FIG. 1 is a process flow diagram of the preparation of an aluminum titanate refractory material according to an embodiment of the present invention.
Detailed Description
The following examples use industrial aluminum slag and industrial titanium slag as raw materials. The chemical composition of the raw materials is shown in the following table 1.
TABLE 1 chemical composition of the raw materials
Figure DEST_PATH_IMAGE001
Example 1
Putting 900g of industrial aluminum slag powder with the granularity of 90 mu m and 100g of industrial titanium slag powder with the granularity of 90 mu m into a mixing roll together for co-milling for 1h to obtain a mixed material; pressing the mixed material into material pellets with the diameter of 9mm by a ball press machine under the pressure of 5 Mpa; and (3) putting the material pellets into a shaft kiln at 1350 ℃ for calcining for 3h, and then naturally cooling along with the kiln to obtain the aluminum titanate refractory material.
The aluminum titanate refractory prepared in this example had a bulk density of 2.32g/cm3The porosity is 26.42%, the normal-temperature breaking strength is 35MPa, and the thermal shock frequency is 14 times.
Example 2
Putting 850g of industrial aluminum slag powder with the granularity of 50 mu m and 150g of industrial titanium slag powder with the granularity of 55 mu m into a mixing roll together for co-grinding for 2.5 hours to obtain a mixed material; pressing the mixed material into material pellets with the diameter of 12mm by a ball press machine under 8 Mpa; and (3) putting the material pellets into a shaft kiln at 1400 ℃ for calcining for 4.5h, and then naturally cooling along with the kiln to obtain the aluminum titanate refractory material.
The aluminum titanate refractory prepared in this example had a bulk density of 2.66g/cm3The porosity is 20.38%, the normal-temperature breaking strength is 42MPa, and the thermal shock frequency is 11 times.
Example 3
Putting 750g of industrial aluminum slag powder with the granularity of 25 mu m and 250g of industrial titanium slag powder with the granularity of 30 mu m into a mixing roll together for co-grinding for 2 hours to obtain a mixed material; pressing the mixed material into material pellets with the diameter of 9mm by a ball press machine under 8 Mpa; and (3) placing the material pellets into a shaft kiln at 1450 ℃ for calcining for 3h, and then naturally cooling along with the kiln to obtain the aluminum titanate refractory material.
The aluminum titanate refractory prepared in this example had a bulk density of 2.53g/cm3The porosity is 25.32%, the normal-temperature breaking strength is 36MPa, and the thermal shock frequency is 12 times.

Claims (3)

1. A method for preparing an aluminum titanate refractory material by using industrial aluminum slag and titanium slag is characterized by comprising the following steps:
(1) putting 70-90% of industrial aluminum slag powder and 10-30% of industrial titanium slag powder into a mixing roll together by mass percent for co-milling for 1-3h to obtain a mixed material;
(2) pressing the mixed material into material pellets with the diameter of 9-15mm by a ball press machine under the pressure of 2-10 Mpa;
(3) and (3) putting the material pellets into a 1300-1550 ℃ shaft kiln for calcining for 3-8h, and then naturally cooling along with the kiln to obtain the aluminum titanate refractory material.
2. The method for preparing the aluminum titanate refractory material by using the industrial aluminum slag and the titanium slag according to the claim 1, wherein the particle size of the industrial aluminum slag powder in the step (1) is 20-90 μm, and the particle size of the industrial titanium slag powder is 20-90 μm.
3. The method for preparing the aluminum titanate refractory material by using the industrial aluminum slag and the titanium slag according to the claim 1, wherein in the chemical components of the industrial aluminum slag powder in the step (1), the mass percentages are as follows: al (Al)2O355-75 percent of the content, 5-20 percent of MgO content and TiO in the chemical components of the industrial titanium slag powder2The content is 60-80%.
CN202010776149.4A 2020-08-05 2020-08-05 Method for preparing aluminum titanate refractory material by using industrial aluminum slag and titanium slag Pending CN111943696A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115160012A (en) * 2022-06-09 2022-10-11 北京金隅通达耐火技术有限公司 Method for preparing aluminum titanate by using titanium corundum
CN117923893A (en) * 2024-03-25 2024-04-26 华北理工大学 Preparation method of aluminum titanate ceramic

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CN1417165A (en) * 2002-12-15 2003-05-14 赵文厚 Al-Cr-Ti refractory material
CN101050114A (en) * 2007-05-22 2007-10-10 福州大学 Formula and method for preparing raw material of aluminum titanate by using sludge from aluminum section plant
US20120073255A1 (en) * 2009-03-30 2012-03-29 Sumitomo Chemical Company, Limited Process for producing aluminum titanate-based ceramics body
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US5032376A (en) * 1988-09-30 1991-07-16 Maschinenfabrik Andritz Actiengesellschaft Method for producing aluminum titanate
CN1417165A (en) * 2002-12-15 2003-05-14 赵文厚 Al-Cr-Ti refractory material
CN101050114A (en) * 2007-05-22 2007-10-10 福州大学 Formula and method for preparing raw material of aluminum titanate by using sludge from aluminum section plant
US20120073255A1 (en) * 2009-03-30 2012-03-29 Sumitomo Chemical Company, Limited Process for producing aluminum titanate-based ceramics body
CN103936433A (en) * 2014-03-21 2014-07-23 海城华宇耐火材料有限公司 Method utilizing industrial slag to prepare magnesium aluminate spinel material
CN106747527A (en) * 2017-03-01 2017-05-31 武汉科技大学 A kind of titanium calcium aluminate fireclay insulating refractory and preparation method thereof
CN106882973A (en) * 2017-03-01 2017-06-23 武汉科技大学 A kind of fireclay insulating refractory with ferrotianium slag as major ingredient and preparation method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115160012A (en) * 2022-06-09 2022-10-11 北京金隅通达耐火技术有限公司 Method for preparing aluminum titanate by using titanium corundum
CN117923893A (en) * 2024-03-25 2024-04-26 华北理工大学 Preparation method of aluminum titanate ceramic

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Application publication date: 20201117