CN112341222A - Hot metal ladle castable and preparation method thereof - Google Patents

Hot metal ladle castable and preparation method thereof Download PDF

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Publication number
CN112341222A
CN112341222A CN202011257403.6A CN202011257403A CN112341222A CN 112341222 A CN112341222 A CN 112341222A CN 202011257403 A CN202011257403 A CN 202011257403A CN 112341222 A CN112341222 A CN 112341222A
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China
Prior art keywords
parts
metal ladle
particle size
hot metal
castable
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CN202011257403.6A
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Chinese (zh)
Inventor
胡春龙
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Hunan Xianggang Ruitai Technology Co ltd
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Hunan Xianggang Ruitai Technology Co ltd
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Priority to CN202011257403.6A priority Critical patent/CN112341222A/en
Publication of CN112341222A publication Critical patent/CN112341222A/en
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    • 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
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06Aluminous cements
    • 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
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

The invention provides a hot metal ladle castable which comprises the following components in parts by weight: 1-5 parts of CA-50 cement; 1-7 parts of CA-70 cement; 60-70 parts of clay clinker; 8-12 parts of high-alumina clinker; 4-6 parts of kyanite; 4-6 parts of activated alumina micro powder; 2-4 parts of silicon micropowder; 0.2-0.3 part of sodium tripolyphosphate; 0.5-1 part of steel fiber; the particle size range of the clay clinker is 0.088-5 mm, and the particle size range of the high-alumina clinker is 0.088-5 mm; the particle size range of the kyanite is 0.2-1 mm, the particle size range of the activated alumina micro powder is 2-5 um, and the particle size range of the silicon micro powder is 0.15-5 um; the particle size of the sodium tripolyphosphate is not more than 0.088 mm; the range of the particle size of the steel fiber is 0.2-20 mm. The hot metal ladle has the characteristics of high strength and low cost, the service life of the hot metal ladle is prolonged, the labor intensity of workers is reduced, and the material consumption and the cost are reduced. The invention also provides a preparation method of the hot-metal ladle castable, and the prepared finished product has the same functions and effects as the hot-metal ladle castable provided by the invention.

Description

Hot metal ladle castable and preparation method thereof
Technical Field
The invention relates to the technical field of refractory casting materials, in particular to a hot metal ladle casting material and a manufacturing method thereof.
Background
The hot metal tank is a device for collecting and conveying molten iron of blast furnace ironmaking products, and is used on medium and small blast furnaces. The hot metal ladle is in a straight cylinder shape, the outer shell is formed by welding steel plates, clay bricks are built in the hot metal ladle, two cast steel trunnions are respectively arranged on two sides of the hot metal ladle and supported on the frame, and a hook pin shaft is arranged at the bottom of the ladle and can be used for hoisting the hot metal ladle to tip molten iron by a crane. When the hot-metal ladle is used, the important components of the normal operation of the whole production line of the iron and steel company can directly relate to whether the production is carried out smoothly or not by safe and efficient operation. At present, refractory materials used by a hot metal ladle of a steel plant are mainly made of clay bricks and high-alumina bricks, have the defects of low strength and easy slag falling, particularly, a ladle nozzle of the hot metal ladle has the defects of fast erosion and serious slag falling, slag cleaning is needed, the slag can be poured again after being cleaned up every time, the slag cleaning operation time is long, the labor intensity is high, the service life of the hot metal ladle is short, the period is short, and the refractory material consumption is short.
Disclosure of Invention
The invention provides a hot metal ladle castable which has the characteristics of high strength, low cost and good safety performance, prolongs the service life of a hot metal ladle, reduces the labor intensity of workers, and reduces the material consumption and cost.
The method for manufacturing the hot metal ladle castable provided by the invention reduces the labor intensity of workers and reduces the material consumption and cost, and meanwhile, the manufactured finished product has the same functions and effects as the hot metal ladle castable provided by the invention.
The technical scheme is as follows:
the casting material for the hot metal ladle is characterized by comprising the following components in parts by weight:
1-5 parts of CA-50 cement;
1-7 parts of CA-70 cement;
60-70 parts of clay clinker;
8-12 parts of high-alumina clinker;
4-6 parts of kyanite;
4-6 parts of activated alumina micro powder;
2-4 parts of silicon micropowder;
0.2-0.3 part of sodium tripolyphosphate;
0.5-1 part of steel fiber;
the particle size range of the clay clinker is 0.088-5 mm, and the particle size range of the high-alumina clinker is 0.088-5 mm;
the particle size range of the kyanite is 0.2-1 mm, the particle size range of the activated alumina micro powder is 2-5 um, and the particle size range of the silicon micro powder is 0.15-5 um;
the particle size of the sodium tripolyphosphate is not more than 0.088 mm;
the range of the particle size of the steel fiber is 0.2-20 mm.
Preferably, the castable for the hot metal ladle comprises the following components in percentage by weight:
0<SiO2≤9.0%,50%≤AL2O3<60%,0<Fe2O3≤3.0%,0<alkali metal oxide not more than 0.50%, 0<S is less than or equal to 0.20 percent and 0<Cl≤0.1%。
Preferably, the castable for the hot metal ladle comprises the following components in percentage by weight:
0<SiO2≤9.0%,68%≤AL2O3<77%,0<Fe2O3≤3.0%,0<alkali metal oxide not more than 0.50%, 0<S is less than or equal to 0.20 percent and 0<Cl≤0.1%。
Preferably, the alkali metal oxide is K in the castable of the hot metal ladle2O and Na2At least one of O.
The preparation method of the castable for the hot metal ladle specifically comprises the following steps:
a: cleaning the interior of a molten iron tank and a mould, and coating lubricating grease on the contact surface of the mould and the raw materials of the casting materials of the molten iron tank;
b, building a layer of high-alumina bricks in the molten iron tank to serve as a permanent layer, installing and adjusting an inner film after the permanent layer bricks are built, and performing pouring construction;
c: weighing each component of the hot metal ladle castable, dry-mixing each component of the hot metal ladle castable for 2-3min under strong stirring, adding water, and wet-mixing for 4-5 min;
d: pouring the components of the hot metal ladle casting material after wet mixing in the step C into a mould, and vibrating by using a vibrating spear during casting; after molding, naturally curing for 24 hours, and demolding;
e: and after the mould is removed, naturally curing for 18 hours in the air, and then baking to obtain a finished product of the hot metal ladle casting material.
The novel hot metal ladle casting material is prepared by compounding the CA-50 cement and the CA-70 cement, under the condition of ensuring the construction performance and green body strength of the casting material, the addition amount and water amount of the cement can be effectively reduced, the volume density of the casting material is improved, the apparent porosity is reduced, the mechanical property of the material is improved, the hot metal ladle casting material has the characteristic of high strength, the slag falling period and the slag falling degree of the hot metal ladle are shortened, the service life of the hot metal ladle is prolonged, the labor intensity is reduced, in addition, the consumption of the cement is reduced, the material consumption is reduced, and the cost of the casting material is greatly reduced. The method for manufacturing the hot metal ladle castable provided by the invention reduces the labor intensity of workers and reduces the material consumption and cost, and meanwhile, the manufactured finished product has the same functions and effects as the hot metal ladle castable provided by the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment provides a casting material for a hot metal ladle, which comprises the following components in parts by weight: the novel hot metal ladle casting material is prepared by compounding the CA-50 cement and the CA-70 cement, can effectively reduce the addition amount and the water addition amount of the cement, improve the volume density of the casting material, reduce the apparent porosity and improve the mechanical property of the material under the condition of ensuring the construction performance and the green strength of the casting material, has the characteristic of high strength, reduces the slag falling period and the slag falling degree of the hot metal ladle, prolongs the service life of the hot metal ladle, reduces the labor intensity, reduces the total consumption of the cement, reduces the material consumption and greatly reduces the cost of the casting material.
The embodiment provides a hot metal ladle castable which further comprises the following components in parts by weight: 60-70 parts of clay clinker and 8-12 parts of high-alumina clinker. The particle size range of the clay clinker is preferably 0.088-5 mm, and the particle size range of the high-alumina clinker is 0.088-5 mm.
The hot metal ladle castable provided by the embodiment further comprises 4-6 parts of kyanite, 4-6 parts of activated alumina micro powder and 2-4 parts of silicon micro powder. Wherein, the granularity range of the kyanite is 0.2-1 mm, the granularity range of the active alumina micro powder is 2-5 um, and the granularity range of the silicon micro powder is 0.15-5 um. The kyanite is a novel refractory material, belongs to high-alumina minerals, has strong chemical corrosion resistance, large mechanical strength of thermal shock and irreversible thermal expansion, and can prevent the problems of shrinkage cracks and peeling of the hot metal ladle castable in the high-temperature and cooling processes by adding the kyanite. The main crystal phase of the activated alumina is alpha-Al 2O3, and the phase change reaction accompanied with volume shrinkage does not exist in the whole temperature change range, so the hot metal ladle castable sintered by the activated alumina micropowder has small apparent porosity, can form a compact texture structure, and obtains good strength and wear resistance.
In order to enable fine powder and micro powder to be well dispersed when the casting material is formed in the casting process and enable the molten iron ladle casting material to have better fluidity, a deflocculant can be added in the embodiment. The preferable deflocculant of the embodiment is sodium tripolyphosphate, the weight part of the sodium tripolyphosphate is 0.2-0.3 part, and the particle size of the sodium tripolyphosphate is not more than 0.088 mm.
The castable for the hot metal ladle is characterized by further comprising a reinforcing agent, wherein the reinforcing agent is preferably steel fibers, the weight part of the steel fibers is 0.5-1 part, and the particle size range of the steel fibers is 0.2-20 mm. The steel fiber is a chemical fiber which supports the long jing as 40-80 by a thin steel wire cutting method, a cold rolling milling method or a molten steel rapid condensation method and can basically keep the original physical and mechanical properties after being subjected to high temperature for a long time. The steel fiber is added, so that the compressive strength, mechanical strength, compressive strength, impact toughness and other properties of the hot metal ladle castable can be improved.
This exampleThe castable for the hot metal ladle is characterized in that the CA-50 cement at least comprises the following components in percentage by weight: 0<SiO2≤9.0%,50%≤AL2O3<60%,0<Fe2O3≤3.0%,0<Alkali metal oxide not more than 0.50%, 0<S is less than or equal to 0.20 percent and 0<Cl≤0.1%。
The castable for the hot metal ladle provided by the embodiment, wherein the CA-70 cement at least comprises the following components in percentage by weight: 0<SiO2≤9.0%,68%≤AL2O3<77%,0<Fe2O3≤3.0%,0<Alkali metal oxide not more than 0.50%, 0<S is less than or equal to 0.20 percent and 0<Cl≤0.1%。
In the castable for the hot metal ladle provided by the embodiment, the CA-50 and CA-70 alkali metal oxides are at least one of K2O and Na 2O.
The invention is illustrated below with reference to specific examples:
the first embodiment is as follows:
raw materials: 70 parts of clay clinker produced by self YNS44, 12 parts of GAL80 high-alumina clinker produced by self, 4 parts of kyanite, 4 parts of activated alumina micropowder, 3 parts of silica micropowder, 0.25 part of sodium tripolyphosphate, 0.75 part of steel fiber, 4 parts of CA-50 cement and 2 parts of CA-70 cement.
The manufacturing steps are as follows:
a: cleaning the interior of the molten iron tank and the mold, and coating lubricating grease on the contact surface of the mold and the raw materials of the castable;
b, building a layer of high-alumina bricks with the thickness of 45mm in the molten iron tank to serve as a permanent layer, installing and adjusting an inner membrane after the permanent layer bricks are built, and performing pouring construction;
c: dry-mixing the components of the castable for 2-3min under strong stirring, adding water, and wet-mixing for 4-5min to obtain the castable;
d, pouring the wet mixed pouring material into a mold, and vibrating by using a vibrating rod during pouring; after the casting material is molded, naturally curing for 24 hours, and demolding;
e: and after the mould is removed, naturally curing in the air for 18h, and then carrying out baking treatment.
And (3) performance detection of a sampled finished product:
example two:
raw materials: 70 parts of clay clinker produced by YNS44, 9 parts of GAL80 high-alumina clinker produced by self, 4.8 parts of kyanite, 5 parts of activated alumina micro powder, 4 parts of silicon micro powder, 0.20 part of sodium tripolyphosphate, 1.0 part of steel fiber, 2 parts of CA-50 cement and 4 parts of CA-70 cement.
The manufacturing steps are as follows:
a: cleaning the interior of the molten iron tank and the mold, and coating lubricating grease on the contact surface of the mold and the casting material;
b, building a layer of high-alumina bricks with the thickness of 45mm in the molten iron tank to serve as a permanent layer, installing and adjusting an inner membrane after the permanent layer bricks are built, and performing pouring construction;
c: dry-mixing the components of the castable for 2-3min under strong stirring, adding water, and wet-mixing for 4-5min to obtain the castable;
d, pouring the wet mixed pouring material into a mold, and vibrating by using a vibrating rod during pouring; after the casting material is molded, naturally curing for 24 hours, and demolding;
e: and after the mould is removed, naturally curing in the air for 18h, and then carrying out baking treatment.
And (3) detecting the performance of a finished product:
example three:
raw materials: 70 parts of clay clinker produced by YNS44, 8 parts of GAL80 high-alumina clinker produced by self, 5.85 parts of kyanite, 5 parts of activated alumina micro powder, 4 parts of silicon micro powder, 0.25 part of sodium tripolyphosphate, 0.90 part of steel fiber, 3 parts of CA-50 cement and 3 parts of CA-70 cement.
The manufacturing steps are as follows:
a: cleaning the interior of the molten iron tank and the mold, and coating lubricating grease on the contact surface of the mold and the casting material;
b, building a layer of high-alumina bricks with the thickness of 45mm in the molten iron tank to serve as a permanent layer, installing and adjusting an inner membrane after the permanent layer bricks are built, and performing pouring construction;
c: dry-mixing the components of the castable for 2-3min under strong stirring, adding water, and wet-mixing for 4-5min to obtain the castable;
d, pouring the wet mixed pouring material into a mold, and vibrating by using a vibrating rod during pouring; after the casting material is molded, naturally curing for 24 hours, and demolding;
e: and after the mould is removed, naturally curing in the air for 18h, and then carrying out baking treatment.
And (3) detecting the performance of a finished product:
the hot-metal ladle castable and the preparation method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (5)

1. The casting material for the hot metal ladle is characterized by comprising the following components in parts by weight:
1-5 parts of CA-50 cement;
1-7 parts of CA-70 cement;
60-70 parts of clay clinker;
8-12 parts of high-alumina clinker;
4-6 parts of kyanite;
4-6 parts of activated alumina micro powder;
2-4 parts of silicon micropowder;
0.2-0.3 part of sodium tripolyphosphate;
0.5-1 part of steel fiber;
the particle size range of the clay clinker is 0.088-5 mm, and the particle size range of the high-alumina clinker is 0.088-5 mm;
the particle size range of the kyanite is 0.2-1 mm, the particle size range of the activated alumina micro powder is 2-5 um, and the particle size range of the silicon micro powder is 0.15-5 um;
the particle size of the sodium tripolyphosphate is not more than 0.088 mm;
the range of the particle size of the steel fiber is 0.2-20 mm.
2. The hot-metal ladle castable according to claim 1, wherein the CA-50 cement comprises at least the following components in percentage by weight:
0<SiO2≤9.0%,50%≤AL2O3<60%,0<Fe2O3≤3.0%,0<alkali metal oxide not more than 0.50%, 0<S is less than or equal to 0.20 percent and 0<Cl≤0.1%。
3. The hot-metal ladle castable according to claim 1, wherein the CA-70 cement comprises at least the following components in percentage by weight:
0<SiO2≤9.0%,68%≤AL2O3<77%,0<Fe2O3≤3.0%,0<alkali metal oxide not more than 0.50%, 0<S is less than or equal to 0.20 percent and 0<Cl≤0.1%。
4. The hot-metal ladle castable material according to claim 2 or 3, wherein the alkali metal oxide is K2O and Na2At least one of O.
5. The method for manufacturing the castable of the hot metal ladle according to any one of claims 1 to 4, comprising the following steps:
a: cleaning the interior of the molten iron tank and the mold, and coating lubricating grease on the raw material contact surface of the mold and the casting material of the molten iron tank;
b, building a layer of high-alumina bricks in the molten iron tank to serve as a permanent layer, installing and adjusting an inner film after the permanent layer bricks are built, and performing pouring construction;
c: weighing each component of the hot metal ladle castable, dry-mixing each component of the hot metal ladle castable for 2-3min under strong stirring, adding water, and wet-mixing for 4-5 min;
d: pouring the components of the hot metal ladle casting material after wet mixing in the step C into a mould, and vibrating by using a vibrating spear during casting; after molding, naturally curing for 24 hours, and demolding;
e: and after the mould is removed, naturally curing for 18 hours in the air, and then baking to obtain a finished product of the hot metal ladle casting material.
CN202011257403.6A 2020-11-11 2020-11-11 Hot metal ladle castable and preparation method thereof Pending CN112341222A (en)

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