CN114933470A - Erosion-resistant castable for cored furnace - Google Patents

Erosion-resistant castable for cored furnace Download PDF

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Publication number
CN114933470A
CN114933470A CN202210592446.2A CN202210592446A CN114933470A CN 114933470 A CN114933470 A CN 114933470A CN 202210592446 A CN202210592446 A CN 202210592446A CN 114933470 A CN114933470 A CN 114933470A
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parts
cored
furnace
powder
component
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王浩
付卫东
范兵
孟千
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Xiangyang Juli High Technology Material Co ltd
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Xiangyang Juli High Technology Material Co ltd
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Abstract

The invention provides an erosion-resistant castable for a cored furnace, which comprises, by weight, 55-95 parts of aggregate, 10-20 parts of second component powder, 5-15 parts of third component micro powder, 5-10 parts of aluminate cement, 0.2-0.5 part of dispersant and 0.03-0.05 part of explosion-proof short fiber. The invention provides an erosion resistant castable for a cored furnace, which can resist slag erosion, has good heat preservation performance and good mechanical performance.

Description

Erosion-resistant castable for cored furnace
Technical Field
The invention relates to the technical field of smelting materials, in particular to an erosion-resistant castable for a cored furnace.
Background
The core furnace consists of a furnace cover, a furnace body, an iron inlet and outlet and an inductor part, wherein the furnace cover, the furnace body and the iron inlet and outlet are mainly made of castable materials. The equipment mainly has the functions of receiving molten iron from a blast furnace and carrying out heat preservation and pouring, and because the inside of the equipment is in a vacuum environment and the temperature of a furnace body is 1450-1500 ℃, the material of the upper furnace body of the cored furnace needs to have good high-temperature performance.
Currently, causes of core furnace damage include: 1. the slag at the iron inlet part and the furnace lining material react to generate a Makoilon effect, so that the erosion of the furnace lining is aggravated; 2. when the slag skimming is not thorough, slag liquid entering the furnace contains a desulfurizer and CaF attached to the desulfurizer 2 The corrosion to the furnace lining reduces the service time of the furnace lining; 3. the heat dissipation area of the part of the iron inlet and outlet is large due to the contact with air, so the temperature difference between the part of the iron inlet and outlet and a hearth in the baking and sintering processesThe difference is huge, the sintering cannot be carried out or the sintering layer is very thin. Therefore, the main reasons for the damage of the furnace lining are the reaction of slag liquid and furnace lining materials and the penetration of the slag liquid in the furnace lining, which damages the stable state of the lining body.
The existing authorization publication number CN1280231C discloses a castable composition for a furnace lining of a power frequency cored induction melting furnace, which mainly comprises 73-80% of fused compact corundum, 3-5% of fused zirconia mullite, 4-6% of silicon carbide, 7-8% of calcium aluminate cement and 6-10% of aluminum oxide micropowder. The technology can know that the silicon carbide component mainly has the function of improving the erosion effect of the slag liquid on the furnace lining, but the silicon carbide can be partially oxidized at high temperature, and the adding amount of the silicon carbide is less, the silicon carbide content in the furnace lining material after high-temperature sintering is less, and the erosion of the slag liquid on the furnace lining material cannot be avoided.
Disclosure of Invention
In order to solve the problems, the invention provides the corrosion-resistant castable for the cored furnace, which can resist slag corrosion and has good thermal insulation performance and mechanical performance.
The technical purpose of the invention is realized by the following technical scheme:
the erosion resistant castable for the cored furnace comprises, by weight, 55-95 parts of aggregate, 10-20 parts of second component powder, 5-15 parts of third component micro powder, 5-10 parts of aluminate cement, 0.2-0.5 part of dispersant and 0.03-0.05 part of explosion-proof short fiber.
As a further setting of the invention, the ferrosilicon nitride powder also comprises 1 to 6 parts by weight of ferrosilicon nitride powder.
As a further setting of the invention, the grain size of the ferrosilicon nitride powder is less than 0.075mm, and the ferrosilicon nitride powder comprises the following elements: more than or equal to 48 percent of Si, more than or equal to 30 percent of N, 12 to 17 percent of Fe and less than or equal to 2.5 percent of O.
As a further setting of the invention, the aggregate comprises the following components in parts by weight: 25-35 parts of fused white corundum or brown corundum with the particle size of 6-3mm, 25-40 parts of fused white corundum or brown corundum with the particle size of 3-1mm and 5-20 parts of mullite with the particle size of 1-0 mm.
As a further arrangement of the present invention, the second component includes one or more of white brown corundum powder, tabular corundum powder, silicon carbide powder, andalusite powder and mullite powder.
As a further configuration of the invention, the third component comprises one or two of bimodal alumina micropowder and silica micropowder.
As a further arrangement of the invention, the dispersant is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a ratio of 1: 2, and (3) preparing.
As a further development of the invention, the particle size of the second component is <0.4mm and the particle size of the third component is <6 μm.
As a further arrangement of the invention, the physical and chemical indexes of the raw materials are shown in Table 1:
table 1: physical and chemical indexes of raw materials
Raw materials Al 2 O 3 SiO 2 CaO MgO Fe 2 O 3 SiC
Electric melting white corundum >99.0％ <0.1％ <0.1％ <0.1％ <0.1％ \
Mullite >70.0％ \ <0.2％ <0.1％ <1.5％ \
Andalusite stone >50.0％ \ <0.1％ <0.1％ <1.0％
Brown corundum >94.0％ <1.5％ <1.0％ <0.1％ <1.0％ \
Plate-like corundum >99.0％ <0.1％ \ \ <0.1％ \
Silicon oxide \ >94.0％ \ \ \ \
Silicon carbide \ \ \ \ \ >95.0％
Aluminate cement ≥70.0％ <0.3％ <30.0％ \ <0.2％ \
The invention also provides a preparation method of the corrosion-resistant castable for the cored furnace, which comprises the following steps:
step (1): mixing the fused white corundum, the brown corundum and the mullite in a mixer for 3-5min to obtain premix A for later use;
step (2): stirring the second component, the third component, aluminate cement, a dispersing agent, the explosion-proof short fibers and the silicon nitride iron powder in a mixer for 3-5min to obtain a premix B for later use;
and (3): and (3) dry-mixing the premix A and the premix B in a mixer for 3-5min according to the proportion to obtain the corrosion-resistant castable for the cored furnace.
The invention has the beneficial effects that:
compared with the common low cement combined corundum silicon carbide castable for the cored furnace, the invention adds the ferrosilicon nitride in the improved scheme, the ferrosilicon nitride has the characteristic of non-wetting with slag liquid and iron liquid, the erosion resistance of the material is improved, part of plastic iron phase in the silicon carbide further promotes sintering, the sintering strength of the castable is improved, and the service life of the cored furnace is further prolonged. The main components of the silicon nitride iron are 75-80 wt% of silicon nitride, 12-17 wt% of free iron and no more than 1 wt% of free silicon, the silicon nitride in the silicon carbide iron has three crystal forms, all are hexagonal crystals, and the iron element usually exists in silicide of alpha-Fe and iron. Under the high-temperature oxidation atmosphere, the Si of the silicon nitride on the surface layer 3 N 4 Oxidation to form SiO 2 Low melting point SiO 2 The layer covers the surface of the material, and the oxidation of the iron phase material forms part of the Fe 2 O 3 Which reduces SiO 2 Melting point and viscosity of oxide layer, promoting SiO 2 The oxide layer melt is easier to coat on the surface of the material, the oxidation process in the material is inhibited, and the breaking strength and the compressive strength of the material are improved, so that the service life of the castable is prolonged, and the metal plasticity Fe phase further promotes the sintering of the castable and improves the sintering strength of the castable.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
First, an embodiment
Example 1
The erosion-resistant castable for the cored furnace comprises 55 parts of aggregate, 10 parts of second component powder, 5 parts of third component micro powder, 5 parts of aluminate cement, 0.2 part of dispersant, 0.03 part of explosion-proof short fiber and 1 part of ferrosilicon nitride powder with the particle size of less than 0.08mm in parts by weight, wherein the aggregate comprises the following components in parts by weight: 25 parts of fused white corundum with the grain diameter of 6-3mm, 25 parts of fused white corundum with the grain diameter of 3-1mm and 5 parts of mullite with the grain diameter of 1-0 mm.
As a further setting of the invention, the grain size of the ferrosilicon nitride powder is less than 0.075mm, and the ferrosilicon nitride powder comprises the following elements: more than or equal to 48 percent of Si, more than or equal to 30 percent of N, 12 to 17 percent of Fe and less than or equal to 2.5 percent of O.
As a further configuration of the invention, the second component comprises 5 parts of plate-shaped corundum powder with the grain diameter of less than 0.05mm, 2 parts of andalusite powder with the grain diameter of less than 0.4mm and 3 parts of silicon carbide powder with the grain diameter of less than 0.08mm in weight percentage.
As a further development of the invention, the third component comprises 5 parts of bimodal alumina micropowder with a particle size of <5 μm.
As a further arrangement of the invention, the dispersant is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a ratio of 1: 2, and (3) preparing.
The invention also provides a preparation method of the corrosion-resistant castable for the cored furnace, which comprises the following steps:
step (1): mixing the fused white corundum, the brown corundum and the mullite in a mixer for 3min to obtain premix A for later use;
step (2): stirring the second component, the third component, aluminate cement, a dispersing agent, the explosion-proof short fibers and the silicon nitride iron powder in a mixer for 3min to obtain a premix B for later use;
and (3): and (3) dry-mixing the premix A and the premix B in a mixer for 3min according to a proportion to obtain the corrosion-resistant castable for the cored furnace.
Example 2
The erosion-resistant castable for the cored furnace comprises, by weight, 95 parts of aggregate, 20 parts of second component powder, 15 parts of third component micro powder, 10 parts of aluminate cement, 0.5 part of dispersant, 0.05 part of explosion-proof short fiber and 6 parts of ferrosilicon nitride powder with the particle size of less than 0.08mm, wherein the aggregate comprises the following components in parts by weight: 35 parts of brown corundum with the grain diameter of 6-3mm, 40 parts of fused white corundum with the grain diameter of 3-1mm and 20 parts of mullite with the grain diameter of 1-0 mm.
As a further setting of the invention, the grain size of the ferrosilicon nitride powder is less than 0.075mm, and the ferrosilicon nitride powder comprises the following elements: more than or equal to 48 percent of Si, more than or equal to 30 percent of N, 12 to 17 percent of Fe and less than or equal to 2.5 percent of O.
As a further configuration of the invention, the second component comprises 20 parts of plate-shaped corundum powder with the particle size of less than 0.2 mm.
As a further development of the invention, the third component comprises 3 parts of fine silica powder with a particle size of <5 μm, 5 parts of fine alumina powder with a particle size of <6 μm, 7 parts of silicon carbide with a particle size of < 0.08.
As a further arrangement of the invention, the dispersant is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a ratio of 1: 2, and (3) preparing.
The invention also provides a preparation method of the corrosion-resistant castable for the cored furnace, which comprises the following steps:
step (1): mixing the fused white corundum, the brown corundum and the mullite in a mixer for 5min to obtain premix A for later use;
step (2): stirring the second component, the third component, aluminate cement, a dispersing agent, the explosion-proof short fibers and the silicon nitride iron powder in a mixer for 5min to obtain a premix B for later use;
and (3): and (3) dry-mixing the premix A and the premix B in a mixer for 5min according to a ratio to obtain the corrosion-resistant castable for the cored furnace.
Example 3
The erosion-resistant castable for the cored furnace comprises, by weight, 80 parts of aggregate, 15 parts of second component powder, 10 parts of third component micro powder, 8 parts of aluminate cement, 0.3 part of dispersant, 0.04 part of explosion-proof short fiber and 4 parts of ferrosilicon nitride powder with the particle size of less than 0.08mm, wherein the aggregate comprises the following components in parts by weight: 30 parts of fused white corundum with the grain diameter of 6-3mm, 35 parts of brown corundum with the grain diameter of 3-1mm and 15 parts of mullite with the grain diameter of 1-0 mm.
As a further setting of the invention, the grain size of the ferrosilicon nitride powder is less than 0.075mm, and the ferrosilicon nitride powder comprises the following elements: more than or equal to 48 percent of Si, more than or equal to 30 percent of N, 12 to 17 percent of Fe and less than or equal to 2.5 percent of O.
As a further configuration of the invention, the second component comprises 8 parts of silicon carbide powder with the grain diameter of less than 0.08mm and 7 parts of andalusite powder with the grain diameter of less than 0.4 mm.
As a further configuration of the invention, the third component comprises 10 parts of bimodal alumina micropowder with a particle size of <5 μm.
As a further arrangement of the invention, the dispersant is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a ratio of 1: 2, and (3) preparing.
The invention also provides a preparation method of the corrosion-resistant castable for the cored furnace, which comprises the following steps:
step (1): mixing the fused white corundum, the brown corundum and the mullite in a mixer for 4min to obtain premix A for later use;
step (2): stirring the second component, the third component, aluminate cement, a dispersing agent, the explosion-proof short fibers and the silicon nitride iron powder in a mixer for 4min to obtain a premix B for later use;
and (3): and (3) dry-mixing the premix A and the premix B in a mixer for 4min according to a proportion to obtain the corrosion-resistant castable for the cored furnace.
Example 4
The corrosion-resistant castable for the cored furnace comprises, by weight, 80 parts of aggregate, 15 parts of second component powder, 10 parts of third component micro powder, 8 parts of aluminate cement, 0.3 part of dispersant and 0.04 part of explosion-proof short fiber, wherein the aggregate comprises the following components in parts by weight: 30 parts of fused white corundum with the grain diameter of 6-3mm, 35 parts of brown corundum with the grain diameter of 3-1mm and 15 parts of mullite with the grain diameter of 1-0 mm.
As a further configuration of the invention, the second component comprises 8 parts of silicon carbide powder with the grain diameter of less than 0.08mm and 7 parts of andalusite powder with the grain diameter of less than 0.4 mm.
As a further configuration of the invention, the third component comprises 10 parts of bimodal alumina micropowder with a particle size of <5 μm.
As a further arrangement of the invention, the dispersant is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a ratio of 1: 2, and (3) preparing.
The invention also provides a preparation method of the corrosion-resistant castable for the cored furnace, which comprises the following steps:
step (1): mixing the fused white corundum, the brown corundum and the mullite in a mixer for 4min to obtain premix A for later use;
step (2): stirring the second component, the third component, aluminate cement, a dispersing agent, the explosion-proof short fibers and the silicon nitride iron powder in a mixer for 4min to obtain a premix B for later use;
and (3): and (3) dry-mixing the premix A and the premix B in a mixer for 4min according to a ratio to obtain the corrosion-resistant castable for the cored furnace.
As a further arrangement of the invention, the physical and chemical indexes of the raw materials are shown in Table 1:
table 1: physical and chemical indexes of raw materials
Raw materials Al 2 O 3 SiO 2 CaO MgO Fe 2 O 3 SiC
Electric melting white corundum >99.0％ <0.1％ <0.1％ <0.1％ <0.1％ \
Mullite >70.0％ \ <0.2％ <0.1％ <1.5％ \
Andalusite stone >50.0％ \ <0.1％ <0.1％ <1.0％
Brown corundum >94.0％ <1.5％ <1.0％ <0.1％ <1.0％ \
Plate-like corundum >99.0％ <0.1％ \ \ <0.1％ \
Silicon oxide \ >94.0％ \ \ \ \
Silicon carbide \ \ \ \ \ >95.0％
Aluminate cement ≥70.0％ <0.3％ <30.0％ \ <0.2％ \
The corrosion-resistant castable for the core furnace prepared in the examples 1 to 4 is added with a proper amount of water and stirred for 3min to have good fluidity, and then is molded into a sample strip of 40mm x 160mm by adopting a casting vibration process with the vibration frequency of 20-40 Hz and the vibration time of 80-120 s. Curing the prepared sample strip in a constant temperature and humidity box with the temperature of 20 ℃ and the humidity of 90% for 24h, then demoulding, drying the demoulded sample strip in a drying oven with the temperature of 110 ℃ for 24h, then carrying out heat treatment on the dried sample at 1000 ℃ for 3h and at 1500 ℃ for 3h respectively, and then carrying out test on the normal-temperature breaking strength and the normal-temperature compressive strength according to national standards GB/T3001-2017 and GB/T5072-2008 respectively, wherein the results are shown in the following table 2:
table 2 results of properties of the respective samples
Figure BDA0003665980640000051
Figure BDA0003665980640000061
Wherein MOR, CCS and PLC respectively refer to normal temperature rupture strength, normal temperature compressive strength and permanent line change rate.
The principles and embodiments of the present invention are explained herein using specific embodiments, which are described only to help understand the method and its core idea of the present invention. 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 (10)

1. The corrosion-resistant castable for the cored furnace is characterized by comprising, by weight, 55-95 parts of aggregate, 10-20 parts of second component powder, 5-15 parts of third component micro powder, 5-10 parts of aluminate cement, 0.2-0.5 part of a dispersing agent and 0.03-0.05 part of explosion-proof short fibers.
2. The corrosion-resistant castable for cored furnaces according to claim 1, further comprising 1-6 parts by weight of ferrosilicon nitride powder.
3. The cored furnace corrosion resistant castable according to claim 2, wherein the ferrosilicon nitride powder has a grain size of <0.075mm, and comprises the following elements in percentage by weight: more than or equal to 48 percent of Si, more than or equal to 30 percent of N, 12 to 17 percent of Fe and less than or equal to 2.5 percent of O.
4. The corrosion-resistant castable for cored furnaces according to claim 1, wherein the aggregate comprises the following components and proportions in parts by weight: 25-35 parts of fused white corundum or brown corundum with the grain diameter of 6-3mm, 25-40 parts of fused white corundum or brown corundum with the grain diameter of 3-1mm and 5-20 parts of mullite with the grain diameter of 1-0 mm.
5. The cored furnace erosion resistant castable of claim 1, wherein the second component comprises one or more of white brown corundum powder, tabular corundum powder, silicon carbide powder, andalusite powder and mullite powder.
6. The refractory castable material for a cored furnace according to claim 1, wherein the third component comprises one or two of bimodal alumina micropowder and silica micropowder.
7. The corrosion-resistant castable for cored furnaces according to claim 1, wherein the dispersant is sodium tripolyphosphate and sodium hexametaphosphate in a weight ratio of 1: 2, and (3) preparing.
8. The cored furnace erosion resistant castable of claim 1, wherein the grain size of the second component is <0.4mm and the grain size of the third component is <6 μm.
9. The corrosion-resistant castable for cored furnaces according to any one of claims 1 to 8, wherein the physical and chemical indexes of the raw materials are shown in Table 1:
table 1: physical and chemical indexes of raw materials
Raw materials Al 2 O 3 SiO 2 CaO MgO Fe 2 O 3 SiC Electric melting white corundum >99.0％ <0.1％ <0.1％ <0.1％ <0.1％ \ Mullite >70.0％ \ <0.2％ <0.1％ <1.5％ \ Andalusite stone >50.0％ \ <0.1％ <0.1％ <1.0％ Brown corundum >94.0％ <1.5％ <1.0％ <0.1％ <1.0％ \ Plate-like corundum >99.0％ <0.1％ \ \ <0.1％ \ Silicon oxide \ >94.0％ \ \ \ \ Silicon carbide \ \ \ \ \ >95.0％ Aluminate cement ≥70.0％ <0.3％ <30.0％ \ <0.2％ \
10. A method for preparing the corrosion-resistant castable material for the cored furnace according to claim 9, characterized by comprising the following steps:
step (1): mixing the fused white corundum, the brown corundum and the mullite in a mixer for 3-5min to obtain premix A for later use;
step (2): stirring the second component, the third component, aluminate cement, a dispersing agent, the explosion-proof short fibers and the ferrosilicon nitride powder in a mixer for 3-5min to obtain a premix B for later use;
and (3): and (3) dry-mixing the premix A and the premix B in a mixer for 3-5min according to the proportion to obtain the corrosion-resistant castable for the cored furnace.
CN202210592446.2A 2022-05-27 2022-05-27 Erosion-resistant castable for cored furnace Pending CN114933470A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102531654A (en) * 2012-03-06 2012-07-04 长兴煤山新型炉料有限公司 Aluminum nitrogen demanganization swing spout castable
CN102775166A (en) * 2012-07-30 2012-11-14 浙江锦诚耐火材料有限公司 Blast furnace main iron channel castable
CN106702056A (en) * 2016-11-28 2017-05-24 浙江锦诚新材料股份有限公司 Iron tap channel swing spout prefabricated piece and manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102531654A (en) * 2012-03-06 2012-07-04 长兴煤山新型炉料有限公司 Aluminum nitrogen demanganization swing spout castable
CN102775166A (en) * 2012-07-30 2012-11-14 浙江锦诚耐火材料有限公司 Blast furnace main iron channel castable
CN106702056A (en) * 2016-11-28 2017-05-24 浙江锦诚新材料股份有限公司 Iron tap channel swing spout prefabricated piece and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
罗永勤等 主编: "《无机非金属材料实验》", 30 June 2018, 冶金工业出版社 *

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Application publication date: 20220823