CN110423103A - A kind of middle water containing opening environmentally friendly chamotte and preparation method thereof - Google Patents

A kind of middle water containing opening environmentally friendly chamotte and preparation method thereof Download PDF

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Publication number
CN110423103A
CN110423103A CN201910739131.4A CN201910739131A CN110423103A CN 110423103 A CN110423103 A CN 110423103A CN 201910739131 A CN201910739131 A CN 201910739131A CN 110423103 A CN110423103 A CN 110423103A
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chamotte
water
environmentally friendly
opening
alumina
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段春云
胡正阳
王德军
梅春兰
黄芳
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Ruitai Magang New Mstar Technology Ltd
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Ruitai Magang New Mstar Technology Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50Pouring-nozzles
    • B22D41/52Manufacturing or repairing thereof
    • B22D41/54Manufacturing or repairing thereof characterised by the materials used therefor
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10Shaped 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
    • C04B35/101Refractories from grain sized mixtures
    • C04B35/103Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
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    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427Silicates other than clay, e.g. water glass
    • C04B2235/3463Alumino-silicates other than clay, e.g. mullite
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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3826Silicon carbides
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/447Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9669Resistance against chemicals, e.g. against molten glass or molten salts

Abstract

The invention belongs to technical field of refractory materials; more particularly to a kind of middle water containing opening environmentally friendly chamotte and preparation method thereof; it is characterized in that; the chamotte includes kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL-370) micro mist; additional sodium carboxymethylcellulose (CMC), yellow starch gum and phosphate dihydrogen aluminum solution;The chamotte Trend of Chrome-free reduces pollution of chromium, meet the requirement of environmental protection;Furthermore, it acts synergistically in the amount ranges of restriction, the chamotte has good erosion resisting, scour resistance and viscosity, and, it has been used in steel mill tundish according to chamotte prepared by the formula, scene reflection workability is good, viscosity is suitable for having enough erosion resistings, scour resistance, meets the requirement of steel mill technique.

Description

A kind of middle water containing opening environmentally friendly chamotte and preparation method thereof
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of middle water containing opening environmentally friendly chamotte and its preparation side Method.
Background technique
Refractory wass, also known as chamotte or joint filler (powder dress object), are made of refractory powder, bonding agent and additive.Almost All refractory raw materials are used as preparing the powder of refractory wass.
According to the difference of composition material, refractory wass can be divided into clay matter fire clay, High-Alumina fire clay, silica fire resistant Mud, magnesite refractory etc..
According to the difference of bonding agent, refractory wass can be divided into following three classes again:
(1) Ceramic bond fire clay: the mixture that it is made of fire resisting fine aggregate and vitrified bond (plastic clay). The condition of delivery is dry shape, uses after need to adding water, is hardened at high temperature by Ceramic bond.
(2) hydraulicity combined fire resistant mud: it be by fire resisting fine aggregate and serve mainly in combination with hydraulicity bonding agent (water Mud) composition mixture.The condition of delivery only has dry shape, uses after adding water, without heating when hardening.
(3) it is chemically combined fire clay: being made of fire resisting fine aggregate and chemical bond (inorganic, organic and inorganic, organic) Mixture.The condition of delivery can be dry shape either pulpous state, lower than hardening below Ceramic bond temperature.According to hardening Temperature, this fire clay can be divided into air-setting and two kinds of thermohardening.Air-setting refractory mortar is often with the air-settings bonding agent such as waterglass It prepares.Heat-setting mortor often uses the thermohardenings bonding agent such as phosphoric acid or phosphate to prepare.After this heat-setting mortor hardening, remove At various temperatures other than intensity all with higher, also have the characteristics that contraction is small, seam is tight, corrosion resistance is strong.
Tundish is the refractory material containers used in mini-mill steelmaking, receives to pour the steel to get off from ladle first Then water is assigned in each crystallizer by middle water containing opening again.Middle water containing opening is that ladle is opened, closes " switch ", This " switch " once out of control or have leakage, not only Baogang's water is thrown into the eastward flowing stream, it is also possible to the person that causes damages heavy or Equipment.And middle water containing opening chamotte is then the puzzle joint material of the refractory product masonry.
It is most common that pink fused alumina chamotte is used between the mouth of a river and brick cup.Pink fused alumina chamotte is using high-quality electric smelting chromium oxide Green, Alpha-alumina (CL-370) micro mist, aluminium dihydrogen phosphate etc. stir, and effect is the seam filled between the mouth of a river and brick cup Gap, the infiltration for reducing molten steel is corroded, but wherein chrome oxide green through high temperature can be converted into Cr VI, can cause environmental pollution.With The raising of social progress and environmental requirement, to proposition Trend of Chrome-free requirement.
Summary of the invention
Present invention seek to address that middle water containing opening is handled with chamotte Trend of Chrome-free, and the problem of guarantee chamotte superperformance.Tool Body, the present invention provides a kind of environmentally friendly chamotte of middle water containing opening, which is characterized in that the chamotte include kyanite, white fused alumina, Green silicon carbide, Alpha-alumina micro mist, additional sodium carboxymethylcellulose, yellow starch gum and phosphate dihydrogen aluminum solution, with kyanite, White fused alumina, green silicon carbide, Alpha-alumina micro mist total amount are criterion calculation, the mass percent of each component are as follows: the kyanite is 5 ~15%, the white fused alumina be 50%-70%, the green silicon carbide be 5~10%, the Alpha-alumina micro mist be 20~ 30%, additional sodium carboxymethylcellulose is 0.1~1%, and additional yellow starch gum is 0.1~2%, and additional phosphate dihydrogen aluminum solution is 15 ~20%.
Preferably, the kyanite partial size is 0.21-0mm, and mass percent is 8~12%.
Preferably, the white fused alumina partial size is respectively 120 mesh, 240 mesh, 325 mesh, and the mass percent difference of each partial size is equal It is 10%~30%, is more preferably respectively as follows: 22~28%, 18~22%, 14~18%.
Preferably, the green silicon carbide partial size is less than 45 μm, and mass percent is 5~9%.
Preferably, the partial size of the Alpha-alumina (CL-370) is less than 5 μm, and mass percent is 20~25%.
Preferably, sodium carboxymethylcellulose (CMC) mass percent is 0.2~0.5%.
Preferably, the yellow starch gum mass percent is 0.5~1%.
Preferably, the specific gravity of the phosphate dihydrogen aluminum solution is 1.33~1.36g/cm3, mass percent be 17~ 18%.
On the other hand, the invention also discloses the middle water containing opening described in any of the above embodiments preparation sides of environmentally friendly chamotte Method, comprising:
(1) weigh kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL-370), sodium carboxymethylcellulose (CMC) and Yellow starch gum is added in slurry mixer and premixes 20~30 minutes;
(2) it is slowly added into phosphate dihydrogen aluminum solution in the solid material mixture in step (1) through premixing, then mixed Refining 20~30 minutes;
(3) chamotte that will be kneaded in step (2), is put into wide-mouth plastic barrel, sealed package, is placed at shady and cool drying It saves.For example, can be put into wide-mouth plastic barrel by 10 ± 0.1Kg of net weight, 15 ± 0.1Kg, 20 ± 0.1Kg, can fill according to demand Sample appropriate size.
The resulting chamotte Trend of Chrome-free of the present invention, reduces pollution of chromium, meet the requirement of environmental protection;In addition, the chamotte include kyanite, White fused alumina, green silicon carbide, Alpha-alumina (CL-370) micro mist, sodium carboxymethylcellulose (CMC), yellow starch gum and biphosphate Aluminum solutions, each component act synergistically in the amount ranges of restriction, make the chamotte have good erosion resisting, scour resistance and Viscosity.The chamotte erosion resisting, scour resistance are good, and 1500 DEG C of * 3h crushings strength under high temperature reach 25MPa or so;Also have higher Viscosity, anti-folded knotting strength is 3.0MPa or more to 200 DEG C of * for 24 hours, and 1500 DEG C of * 3h linear changes (%) are 0.5~1.0%;This Outside, not easily settled during this product storage, it is sealed 30 days or more, without significant change, storge quality is good for appearance and performance. Also, it is used in steel mill tundish according to chamotte prepared by the formula, scene reflection workability is good, viscosity is suitable Preferably, there is enough erosion resistings, scour resistance, meet the requirement of steel mill technique.
Specific embodiment
The present invention will be further described with reference to the examples below.Described embodiment and its result are merely to illustrate The present invention, without the present invention described in detail in claims should will not be limited.
Embodiment 1
A kind of environmentally friendly chamotte of middle water containing opening, consists of the following mass percentage components:
Kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL-370) each component mass percent with each component account for this 4 The ratio of component total amount calculates;Additive sodium carboxymethylcellulose (CMC), yellow starch gum, phosphate dihydrogen aluminum solution (specific gravity 1.33 ~1.36g/cm3) mass percent above-mentioned 4 component total amount accounted for each component in addition calculate;Other embodiments and comparative example are each Constituent mass percentage is calculated with 1 same procedure of embodiment.
4 component total amount of the present embodiment is 3KG.
Middle water containing opening is prepared with environmentally friendly chamotte by following methods.
Concrete operation step are as follows:
(1) ratio weighs kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL-370), carboxymethyl cellulose by weight Sodium (CMC) and yellow starch gum are added in slurry mixer and premix 30 minutes;
(2) phosphate dihydrogen aluminum solution is slowly added into the solid material mixture in step (1) through premixing, and (specific gravity is 1.33~1.36g/cm3), then it is kneaded 20 minutes;
(3) chamotte that will be kneaded in step (2), is put into wide-mouth plastic barrel, sealed package, is placed on shady and cool drying Place.
The environmentally friendly chamotte that embodiment 1 is prepared carries out resistance to bond, erosion resisting, scour resistance test, test result Are as follows:
Anti- folded knotting strength is 2.0MPa to (1) 200 DEG C of * for 24 hours;
(2) 1500 DEG C of * 3h linear changes (%): 0.66%;
(3) 1500 DEG C of * 3h crushings strength under high temperature are 27.1MPa.
Embodiment 2
A kind of environmentally friendly chamotte of middle water containing opening, consisting of the following mass percentage components, (4 component weights are 10Kg):
Middle water containing opening is prepared with environmentally friendly chamotte by following methods.
Concrete operation step are as follows:
(1) ratio weighs kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL-370), carboxymethyl cellulose by weight Sodium (CMC) and yellow starch gum are added in slurry mixer and premix 25 minutes;
(2) phosphate dihydrogen aluminum solution is slowly added into the solid material mixture in step (1) through premixing, and (specific gravity is 1.33~1.36g/cm3), then it is kneaded 25 minutes;
(3) chamotte that will be kneaded in step (2), is put into wide-mouth plastic barrel, sealed package by 10 ± 0.1Kg of net weight, It is placed at shady and cool drying.
The environmentally friendly chamotte that embodiment 2 is prepared carries out resistance to bond, erosion resisting, scour resistance test, test result Are as follows:
Anti- folded knotting strength is 2.9MPa to (1) 200 DEG C of * for 24 hours;
(2) 1500 DEG C of * 3h linear changes (%): 0.51%;
(3) 1500 DEG C of * 3h crushings strength under high temperature are 23.2MPa.
By the environmentally friendly chamotte that embodiment 2 is prepared wrapped in Ma Gangchang material South 2# machine 13# packet (quick change) mouth of a river with It is used between brick cup, scene reflection workability is good, viscosity is suitable for that erosion resisting is strong.
Embodiment 3
A kind of environmentally friendly chamotte of middle water containing opening, consist of the following mass percentage components (4 composition weights are 10Kg):
Middle water containing opening is prepared with environmentally friendly chamotte by following methods.
Concrete operation step are as follows: (1) ratio weighs kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL- by weight 370), sodium carboxymethylcellulose (CMC) and yellow starch gum are added in slurry mixer and premix 20 minutes;
(2) phosphate dihydrogen aluminum solution is slowly added into the solid material mixture in step (1) through premixing, and (specific gravity is 1.33~1.36g/cm3), then it is kneaded 30 minutes;
(3) chamotte that will be kneaded in step (2), is put into wide-mouth plastic barrel, sealed package by 10 ± 0.1Kg of net weight, It is placed at shady and cool drying.
The environmentally friendly chamotte that embodiment 3 is prepared carries out resistance to bond, erosion resisting, scour resistance test, test result Are as follows:
Anti- folded knotting strength is 3.1MPa to (1) 200 DEG C of * for 24 hours;
(2) 1500 DEG C of * 3h linear changes (%): 0.76%;
(3) 1500 DEG C of * 3h crushings strength under high temperature are 25.6MPa.
The environmentally friendly chamotte that embodiment 3 is prepared is put into wide-mouth plastic barrel, sealed package, sets in a cool and dry place 30 After it, appearance is without significant change;And wrap in Ma Gangchang material South 2# machine 16# packet (quick change) and used between the mouth of a river and brick cup, Scene reflection workability is good, viscosity is suitable for that erosion resisting is strong.
Comparative example 1
A kind of environmentally friendly chamotte of middle water containing opening, consist of the following mass percentage components (4 composition weights are 3Kg):
Middle water containing opening is prepared with environmentally friendly chamotte by following methods.
Concrete operation step are as follows:
(1) ratio weighs kyanite, white fused alumina, zirconium oxide, Alpha-alumina (CL-370), sodium carboxymethylcellulose by weight (CMC) and yellow starch gum it, is added in slurry mixer and premixes 20 minutes;
(2) phosphate dihydrogen aluminum solution is slowly added into the solid material mixture in step (1) through premixing, and (specific gravity is 1.33~1.36g/cm3), then it is kneaded 30 minutes;
(3) chamotte that will be kneaded in step (2), is put into wide-mouth plastic barrel, sealed package, is placed on shady and cool drying Place.
The environmentally friendly chamotte viscosity being prepared in comparative example 1 is slightly poor;It is put into wide-mouth plastic barrel, sealed package is placed in yin The dry place of airing after a week, occurs settling and powder phenomenon-tion.
Comparative example 2
A kind of environmentally friendly chamotte of middle water containing opening, consist of the following mass percentage components (weight 3Kg):
Middle water containing opening is prepared with environmentally friendly chamotte by following methods:
Concrete operation step are as follows:
(1) ratio weighs kyanite, white fused alumina, green silicon carbide, Alpha-alumina (CL-370), carboxymethyl cellulose by weight Sodium (CMC) and yellow starch gum are added in slurry mixer and premix 30 minutes;
(2) phosphate dihydrogen aluminum solution is slowly added into the solid material mixture in step (1) through premixing, and (specific gravity is 1.33~1.36g/cm3), then it is kneaded 20 minutes.
The environmentally friendly chamotte concentration being prepared in comparative example 2 is dilute, and viscosity is poor.

Claims (9)

1. a kind of environmentally friendly chamotte of middle water containing opening, which is characterized in that the chamotte includes kyanite, white fused alumina, green silicon carbide, α- Alumina powder, additional sodium carboxymethylcellulose, yellow starch gum and phosphate dihydrogen aluminum solution, with kyanite, white fused alumina, green carbon SiClx, Alpha-alumina micro mist total amount are criterion calculation, the mass percent of each component are as follows: the kyanite is 5~15%, described White fused alumina is 50%-70%, and the green silicon carbide is 5~10%, and the Alpha-alumina micro mist is 20~30%, additional carboxymethyl Sodium cellulosate is 0.1~1%, and additional yellow starch gum is 0.1~2%, and additional phosphate dihydrogen aluminum solution is 15~20%.
2. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the kyanite partial size is 0.21-0mm, mass percent are 8~12%.
3. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the white fused alumina partial size is respectively 120 mesh, 240 mesh, 325 mesh, the mass percent of each partial size are 10%~30% respectively, be more preferably respectively as follows: 22~28%, 18~22%, 14~18%.
4. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the green silicon carbide partial size is small In 45 μm, mass percent is 5~9%.
5. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the partial size of the Alpha-alumina is Less than 5 μm, mass percent is 20~25%.
6. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the sodium carboxymethylcellulose matter Measuring percentage is 0.2~0.5%.
7. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the yellow starch gum mass percent It is 0.5~1%.
8. the environmentally friendly chamotte of middle water containing opening according to claim 1, which is characterized in that the phosphate dihydrogen aluminum solution Specific gravity is 1.33~1.36g/cm3, mass percent is 17~18%.
9. the described in any item middle water containing openings of the claim 1-8 preparation method of environmentally friendly chamotte, comprising:
(1) kyanite, white fused alumina, green silicon carbide, Alpha-alumina, sodium carboxymethylcellulose and yellow starch gum are weighed, mud is added and stirs It mixes in machine and premixes 20~30 minutes;
(2) it is slowly added into phosphate dihydrogen aluminum solution in the solid material mixture in step (1) through premixing, is then kneaded 20 ~30 minutes;
(3) chamotte that will be kneaded in step (2), is put into wide-mouth plastic barrel, sealed package, is placed at shady and cool drying and protects It deposits.
CN201910739131.4A 2019-08-12 2019-08-12 A kind of middle water containing opening environmentally friendly chamotte and preparation method thereof Pending CN110423103A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN112374874A (en) * 2021-01-15 2021-02-19 北京利尔高温材料股份有限公司 Anti-seepage steel environment-friendly tundish fire clay, preparation method and construction method

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CN105622122A (en) * 2016-02-02 2016-06-01 江苏瑞复达新材料有限公司 Ultramicro kyanite refractory castable and application thereof
CN107721397A (en) * 2017-11-01 2018-02-23 安徽马钢耐火材料有限公司 A kind of pink fused alumina chamotte and preparation method thereof
CN109437939A (en) * 2018-12-30 2019-03-08 河南新拓耐火材料有限公司 A kind of fire clay and preparation method thereof

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