CN107188548B - Wear-resistant brick and preparation method thereof - Google Patents

Wear-resistant brick and preparation method thereof Download PDF

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Publication number
CN107188548B
CN107188548B CN201710576230.6A CN201710576230A CN107188548B CN 107188548 B CN107188548 B CN 107188548B CN 201710576230 A CN201710576230 A CN 201710576230A CN 107188548 B CN107188548 B CN 107188548B
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parts
granularity
alumina
wear
product
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CN107188548A (en
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蔡国庆
王文学
王希波
翟红军
秦建涛
李慧雯
张春燕
刘静
燕宿祥
徐国涛
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Shandong Refractories Group Lunai Kiln Refractory Co ltd
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Shandong Refractories Group Lunai Kiln Refractory Co ltd
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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
    • C04B35/01—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
    • C04B35/10—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 aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428—Silicon
    • 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
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • 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
    • C04B2235/70—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)
  • Compositions Of Oxide Ceramics (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention relates to an abrasion-resistant brick and a preparation method thereof, wherein the abrasion-resistant brick is composed of the following raw materials in parts by weight: 35-40 parts of JGAL-85 alumina with the granularity of 3-1mm and 1-0mm, 20-25 parts of synthetic mullite with the granularity of 3-1mm and 1-0mm, 5-10 parts of SiC with the granularity of 0.5-0mm and 200#, and 5u10-15 parts of m high-temperature alumina, and f-SiO with the granularity of 2um23-5 parts of Si powder with the granularity of 200 meshes, 3-5 parts of clay with the granularity of 325 meshes, 0.4 part of curing agent and 3-4 parts of bonding agent resin. The invention improves the density of the product, promotes sintering and improves the wear resistance of the product. So as to meet the performance index requirement of the product. The invention greatly prolongs the service life of the coke dry quenching cooling section, reduces the operation cost of enterprises, and has better strength and wear resistance than BM bricks.

Description

Wear-resistant brick and preparation method thereof
Technical Field
The invention relates to an abrasion-resistant brick and a preparation method thereof.
Background
At present, B-grade mullite Bricks (BM) are used as refractory materials of a dry quenching cooling part, and the service life is about 4-5 years. The wear resistance of the refractory material at this position directly determines the service life.
Since the beginning of the 2002 Wu steel dry quenching, a large number of dry quenching engineering projects appear in China. In the case of dry quenching annual inspection maintenance in recent years, one of the problems is that the materials of the cooling part of the dry quenching chamber are abraded to different degrees, and mainly the abrasion resistance of the materials is poor so as to cause excessive abrasion. At present, the domestic dry quenching cooling part uses (Q) BM material. In the Japanese Dry quenching project, H31LL is often used in the cooling section, and N53-M material is also used. The index performance of the BM mullite brick currently used in the cooling chamber is relatively low, and is not matched with the performance index required by the actual severe working condition in the dry quenching furnace, particularly the requirement of the original BM mullite brick on the normal-temperature wear-resisting coefficient is not high, wherein the index of the normal-temperature wear loss of less than 10cc is too low, and the BM mullite brick is not suitable for the long-term friction of coke in the dry quenching furnace to generate wear, so that the large-area wear damage of the cooling chamber brick is caused.
Disclosure of Invention
The invention aims to provide an abrasive brick and a preparation method thereof, which can improve the density of products, promote sintering and improve the wear resistance of the products. So as to meet the performance index requirements of products, greatly improve the service life of the coke dry quenching cooling section and reduce the operation cost of enterprises.
The invention relates to an abrasive brick, which consists of the following raw materials in parts by weight:
35-40 parts of JGAL-85 alumina with the granularity of 3-1mm and 1-0mm, 20-25 parts of synthetic mullite with the granularity of 3-1mm and 1-0mm, 5-10 parts of SiC with the granularity of 0.5-0mm and 200#, 10-15 parts of high-temperature alumina with the granularity of 5um and f-SiO with the granularity of 2um23-5 parts of Si powder with the granularity of 200 meshes, 3-5 parts of clay with the granularity of 325 meshes, 0.4 part of curing agent and 3-4 parts of bonding agent resin.
The wear-resistant brick is preferably prepared from the following raw materials in parts by weight:
15-20 parts of JGAL-85 alumina with the granularity of 3-1mm, 15-20 parts of JGAL-85 alumina with the granularity of 1-0mm, 13-18 parts of synthetic mullite with the granularity of 3-1mm, 8-10 parts of synthetic mullite with the granularity of 1-0mm, 6-7 parts of SiC with the granularity of 0.5-0mm, 2-3 parts of SiC with the granularity of 200#, 4-6 parts of andalusite with the granularity of 10um, 13-15 parts of high-temperature alumina with the granularity of 5um and f-SiO with the granularity of 2um22-4 parts of Si powder with the granularity of 200 meshes, 5-7 parts of clay with the granularity of 325 meshes, 0.2-0.5 part of curing agent and 3-4 parts of bonding agent.
The curing agent is urotropin.
The binder is a resin.
The preparation method of the wear-resistant brick comprises the steps of uniformly mixing the raw materials, pressing by a press, drying, controlling the drying moisture to be less than 1%, and firing in a tunnel kiln.
The invention uses a high-speed mixing roll to mix uniformly. And (3) using a 500t press machine for heavy pressing to improve the product density, using a tunnel dryer for drying, and controlling the drying moisture to be less than 1%. The materials are sintered by a tunnel kiln at 1400 ℃ and 1430 ℃.
The firing temperature is 1400 ℃ and 1450 ℃.
The firing temperature is preferably 1400 ℃ and 1430 ℃.
The sintering is carried out at 1400 ℃ and 1430 ℃ to ensure the reaction of the raw materials and the wear resistance of the product in use. It is also important to control the firing temperature.
The alumina, the mullite and the silicon carbide are used as main raw materials, reasonable raw material particle size fraction and fine raw material particle proportion are selected through the application of the micro powder, and the alumina, the mullite and the silicon carbide form good compatible proportion with a binding agent, so that the product density is improved, the sintering is promoted, and the wear resistance of the product is improved to meet the performance index requirement of the product.
The main raw materials are homogenized alumina and mullite materials with better wear resistance. Chemical reactions and crystal transformation are ubiquitous in refractory materials and have a large effect on the properties of the product. In order to achieve high wear resistance of the product, wear-resistant raw materials and the addition amount are added.
Silicon carbide is selected as a key raw material for improving the wear resistance of the product.
The plasticizer promotes the reaction of the raw materials and improves the strength of the product.
The strength of the wear-resistant brick combined with the plasticity of the coke dry quenching cooling section is greatly improved compared with BM. The application range is greatly improved.
The strength of the BM brick is 85MPa, and the strength of the plastic combined abrasive brick is more than 150MPa, and the strength of the product is increased by using in-situ reaction combination.
The silicon carbide is added, so that the wear resistance is enhanced.
Chemical reactions and crystal transformation are ubiquitous in refractory materials and have a large effect on the properties of the product. In order to achieve high wear resistance of the product, wear-resistant raw materials are added.
The wear-resistant brick disclosed by the invention is wide in application, and is preferably used for a dry quenching furnace and more preferably used for a cooling section of the dry quenching furnace.
Compared with the prior art, the invention has the following beneficial effects:
the invention improves the density of the product, promotes sintering and improves the wear resistance of the product. So as to meet the performance index requirement of the product. The invention greatly prolongs the service life of the coke dry quenching cooling section, reduces the operation cost of enterprises, and has better strength and wear resistance than BM bricks.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The wear-resistant brick disclosed by the invention is composed of the following raw materials in parts by weight:
19 parts of JGAL-85 alumina with the granularity of 3-1mm, 18 parts of JGAL-85 alumina with the granularity of 1-0mm, 15 parts of synthetic mullite with the granularity of 3-1mm, 9 parts of synthetic mullite with the granularity of 1-0mm, 5 parts of SiC with the granularity of 0.5-0mm, 2 parts of SiC with the granularity of 200#, 5 parts of andalusite with the granularity of 10um, 14 parts of high-temperature alumina with the granularity of 5um, f-SiO 23 parts with the granularity of 2um, 4 parts of Si powder with the granularity of 200 meshes, 6 parts of clay with 325 meshes, 0.4 part of a curing agent (urotropine) and 3-4 parts of a bonding agent (resin).
And (3) uniformly mixing by using a high-speed mixer. And (3) using a 500t press machine for heavy pressing to improve the product density, using a tunnel dryer for drying, and controlling the drying moisture to be less than 1%. The mixture is sintered by a tunnel kiln, and the sintering temperature is 1400 ℃.
Example 2
The wear-resistant brick is characterized by comprising the following raw materials in parts by weight:
17 parts of JGAL-85 alumina with the granularity of 3-1mm, 20 parts of JGAL-85 alumina with the granularity of 1-0mm, 17 parts of synthetic mullite with the granularity of 3-1mm, 7 parts of synthetic mullite with the granularity of 1-0mm, 5 parts of SiC with the granularity of 0.5-0mm, 2 parts of SiC with the granularity of 200#, 5 parts of andalusite with the granularity of 10um, 14 parts of high-temperature alumina with the granularity of 5um, f-SiO 23 parts with the granularity of 2um, 4 parts of Si powder with the granularity of 200 meshes, 6 parts of clay with 325 meshes, 0.4 part of a curing agent (urotropine) and 3-4 parts of a bonding agent (resin).
And (3) uniformly mixing by using a high-speed mixer. And (3) using a 500t press machine for heavy pressing to improve the product density, using a tunnel dryer for drying, and controlling the drying moisture to be less than 1%. The mixture is sintered by a tunnel kiln, and the sintering temperature is 1410 ℃.
Example 3
The wear-resistant brick is characterized by comprising the following raw materials in parts by weight:
20 parts of JGAL-85 alumina with the granularity of 3-1mm, 17 parts of JGAL-85 alumina with the granularity of 1-0mm, 14 parts of synthetic mullite with the granularity of 3-1mm, 10 parts of synthetic mullite with the granularity of 1-0mm, 5 parts of SiC with the granularity of 0.5-0mm, 2 parts of SiC with the granularity of 200#, 5 parts of andalusite with the granularity of 10um, 14 parts of high-temperature alumina with the granularity of 5um, f-SiO 23 parts with the granularity of 2um, 4 parts of Si powder with the granularity of 200 meshes, 6 parts of clay with 325 meshes, 0.4 part of a curing agent (urotropine) and 3-4 parts of a bonding agent (resin).
And (3) uniformly mixing by using a high-speed mixer. And (3) using a 500t press machine for heavy pressing to improve the product density, using a tunnel dryer for drying, and controlling the drying moisture to be less than 1%. The mixture is sintered by a tunnel kiln, and the sintering temperature is 1420 ℃.

Claims (2)

1. The wear-resistant brick is characterized by comprising the following raw materials in parts by weight:
15-20 parts of JGAL-85 alumina with the granularity of 3-1mm, 15-20 parts of JGAL-85 alumina with the granularity of 1-0mm, 13-18 parts of synthetic mullite with the granularity of 3-1mm, 8-10 parts of synthetic mullite with the granularity of 1-0mm, 6-7 parts of SiC with the granularity of 0.5-0mm, 2-3 parts of SiC with the granularity of 200#, 4-6 parts of andalusite with the granularity of 10 microns, 13-15 parts of high-temperature alumina with the granularity of 5 microns, and f-SiO with the granularity of 2 microns2 2-4 parts of Si powder with the granularity of 200 meshes, 5-7 parts of clay with the granularity of 325 meshes, 0.2-0.5 part of curing agent urotropine and 3-4 parts of bonding agent resin;
the preparation method of the wear-resistant brick comprises the steps of uniformly mixing the raw materials, carrying out heavy pressing by using a press, drying, controlling the drying moisture content to be less than 1%, and sintering by using a tunnel kiln at the sintering temperature of 1400-.
2. The abrasion-resistant brick according to claim 1, wherein the firing temperature is 1400-1430 ℃.
CN201710576230.6A 2017-07-14 2017-07-14 Wear-resistant brick and preparation method thereof Active CN107188548B (en)

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CN107188548B true CN107188548B (en) 2021-09-17

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CN117263662B (en) * 2023-11-21 2024-02-27 山东耐材集团鲁耐窑业有限公司 Low-internal-stress dry quenching column part brick and preparation method thereof

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CN100337987C (en) * 2005-04-18 2007-09-19 宜兴市诺明高温耐火材料有限公司 Mullite silicon carbide refractory material for production of dry coke and its production
CN103130515A (en) * 2011-12-02 2013-06-05 河南省新密市青屏耐火材料有限责任公司 Mullite brick used for dry quenching stove
CN102674858B (en) * 2012-05-22 2014-01-15 宜兴市恒祥耐火材料有限公司 Plastic composite-phase anti-stripping and wear-resisting mullite brick and preparation method thereof
CN103693973B (en) * 2013-12-02 2015-06-17 武汉钢铁(集团)公司 Refractory brick for dry-quenching coke oven and preparation method of refractory brick
CN104016692B (en) * 2014-06-06 2016-03-16 武汉钢铁(集团)公司 A kind of coke dry quenching furnace cooling section refractory materials and preparation method
CN105859308B (en) * 2016-03-30 2018-09-07 湖南湘钢瑞泰科技有限公司 A kind of refractory material and tuyere combined brick

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