CN115650737A - Refractory castable and application thereof - Google Patents
Refractory castable and application thereof Download PDFInfo
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- CN115650737A CN115650737A CN202211040383.6A CN202211040383A CN115650737A CN 115650737 A CN115650737 A CN 115650737A CN 202211040383 A CN202211040383 A CN 202211040383A CN 115650737 A CN115650737 A CN 115650737A
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Abstract
The invention relates to the technical field of refractory castable, in particular to a refractory castable and application thereof, wherein the refractory castable mainly comprises the following raw materials in parts by weight: 40-80 parts of waste refractory materials, 0-20 parts of high-alumina aggregate, 10-25 parts of high-alumina powder, 5-10 parts of micro powder, 2-5 parts of binding agents and 0.5-3 parts of additives; the waste refractory material is used as the bone powder material, the high-aluminum powder, the micro powder, the additive and other components are compounded to prepare the refractory castable, the obtained refractory castable is used for manufacturing the steelmaking ladle cover, the multiple properties of the ladle cover are improved, and the manufactured ladle cover has the advantages of low volume density, high heat insulation performance and the like, and is low in cost and long in service life.
Description
[ technical field ] A
The invention relates to the technical field of refractory castable, in particular to a refractory castable and application thereof.
[ background ] A method for producing a semiconductor device
The technology of covering steel ladles and tundishes in steel plants is popularized in steel plants all over the country, and the use of the ladle cover greatly reduces the loss of molten steel heat and brings benefits to molten steel smelting and steel continuous casting. However, since ladle lids and tundish lids must withstand high-temperature heat radiation of molten steel, erosion of molten steel slag, rapid temperature change, and the like, the ladle lids and tundish lids are required to have high heat insulating performance in practical use.
At present, most steel mills adopt steel structures and heat-resistant steel ladle covers made of refractory materials (casting materials, heat-resistant fibers and the like) or directly use billet ladle covers, and the using effect is not ideal mostly. Firstly, when the refractory fiber is used, although the heat insulation effect is good, the durability is poor, the slag corrosion resistance is weak, the service life is short, and the steel-making requirement is difficult to meet; secondly, when the refractory castable meeting the high-temperature performance requirement is used, although the working requirement can be met, the heat insulation performance and the heat stability of the obtained ladle cover are difficult to meet the requirement, the cost is high, and the competitiveness is weak; thirdly, when the billet cover is used, not only the heat loss is serious, but also the cost is high.
The ladle cover is generally poured by adopting a pouring material, and the quality of the finished ladle cover is influenced by the selection of the pouring material, so that a refractory pouring material is developed, the ladle cover manufactured by the pouring material can solve the technical problems, and the invention is generated by the applicant in the long-term effort direction.
[ summary of the invention ]
In view of the above, there is a need to provide a castable material, which can be used in the manufacturing of a steel-making ladle cover, and can ultimately solve the common problems of the prior ladle cover and also greatly reduce the manufacturing cost of the ladle cover.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the refractory castable mainly comprises the following raw materials in parts by weight: 40-80 parts of waste refractory materials, 0-20 parts of high-alumina aggregate, 10-25 parts of high-alumina powder, 5-10 parts of micro powder, 2-5 parts of binding agents and 0.5-3 parts of additives.
The applicant names the refractory castable of the present application as: WZS-150.
Further, the refractory castable mainly comprises the following raw materials in parts by weight: 60 parts of waste refractory materials, 10 parts of high-alumina aggregate, 18 parts of high-alumina powder, 7 parts of micro powder, 3 parts of bonding agents and 2 parts of additives.
Furthermore, the waste refractory material is an aluminum-silicon refractory material, and the particle size of the waste refractory material is less than 30mm.
Specifically, the waste refractory materials are corundum castable, mullite castable, corresponding waste brick products and waste refractory materials containing special components such as zirconium, chromium and the likeAnd (4) feeding. The chemical components are as follows: al (Al) 2 O 3 Is 50-80wt% SiO 2 The content of (A) is as follows: 20-40wt% of CaO, mgO, fe 2 O 3 The total content of the components is 0-4wt%.
Further, the micro powder is prepared by mixing alumina micro powder with the particle size of less than 5um and silicon micro powder with the particle size of less than 1um according to the mass ratio of 1. Wherein, in the alumina micro powder, al 2 O 3 The content of (A) is more than 98%, and SiO in the silicon micropowder 2 The content of (A) is 92-97%.
Further, the grain diameter of the high-aluminum powder is 200-300 meshes, and the main chemical component of the high-aluminum powder is Al 2 O 3 75-90wt% of Fe 2 O 3 The content of (B) is 0-2%.
Further, the binding agent is pure calcium aluminate cement. Meets the national standard of Al 2 O 3 The content of (A) is more than 68%.
Further, the additive is obtained by mixing phosphate (one or any combination of sodium tripolyphosphate and sodium hexametaphosphate) and organic fiber according to a mass ratio of 1-2.
The invention also provides a preparation method of the refractory castable, which comprises the following steps: and (3) premixing the additive and the micro powder to obtain a mixture A, then mixing the waste refractory material, the high-alumina powder and the binding agent to obtain a mixture B, and fully stirring and mixing the mixture A and the mixture B to obtain the refractory castable.
The invention also provides a manufacturing method of the steelmaking ladle cover, which is characterized in that the steelmaking ladle cover is manufactured by taking the refractory castable as a pouring material.
The concrete use mode of the castable comprises the following steps: adding the finished casting material into a stirrer, dry-mixing and stirring for 2-5 minutes, adding a proper amount of tap water, stirring for 3-5 minutes, discharging air by using a vibration rod or a flat vibrator, and vibrating to be compact, thus completing casting.
The invention has at least the following beneficial effects:
1. according to the preparation method, waste refractory materials are used as bone powder materials and are compounded with high-alumina powder, micro powder, additives and other components to prepare the refractory castable, the obtained refractory castable is used for manufacturing the steelmaking ladle cover, and experiments show that the castable can improve multiple performances of the ladle cover, and the manufactured ladle cover has the advantages of low volume density, high heat insulation performance and the like and is long in service life. Therefore, the castable can solve the problems commonly existing in the steelmaking ladle cover in the prior art, the manufacturing cost of the steelmaking ladle cover is greatly reduced, the cost is only 30-50% of that of the traditional material, in addition, the waste recycled refractory material is derived from the waste material of a steel mill, the recycling of the waste recycled refractory material is also beneficial to the environmental protection, and the castable is worthy of being widely popularized.
2. In the preparation process of the refractory castable, the additive and the micro powder are premixed, and the uniform dispersion of trace components in the additive and the micro powder can be realized through premixing, so that the construction efficiency is improved.
3. In the process of preparing the steelmaking ladle cover, the prepared castable finished product is firstly placed into a stirrer, after dry mixing and stirring are carried out for a period of time, a proper amount of water is added for stirring, the raw materials can be fully adjusted in the adhesion state of bone powder and micro powder under dry mixing through dry mixing and stirring, the mineral phase composition and the structure of the castable are further improved, then water is added to prepare slurry for pouring, and the steelmaking ladle cover with uniform performance of each part can be obtained, and the service life is long.
[ detailed description ] embodiments
The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Example 1:
the embodiment provides a refractory castable, which mainly comprises the following raw materials in parts by weight: 40 parts of waste refractory materials, 10 parts of high-alumina powder, 5 parts of micro powder, 2 parts of binding agents and 1 part of additives;
the waste refractory material is an aluminum-silicon refractory material, and the particle size of the waste refractory material is less than 30mm; the chemical components are as follows: al (aluminum) 2 O 3 Is 50wt% SiO 2 The content of (A) is as follows: 45wt% of CaO, mgO, fe 2 O 3 The total content of the components is 5wt%; the micro powder is obtained by mixing alumina micro powder with the particle size of less than 5um and silicon micro powder with the particle size of less than 1um according to the mass ratio of 1; the grain diameter of the high-aluminum powder is 200 meshes, and the main chemical component of the high-aluminum powder is Al 2 O 3 75wt% of Fe 2 O 3 The content of (A) is 1%; the binding agent is pure calcium aluminate cement; the additive is obtained by mixing phosphate (sodium tripolyphosphate and sodium hexametaphosphate) and organic fiber according to the mass ratio of 1;
the embodiment also provides a preparation method of the refractory castable, which specifically comprises the following steps: and premixing the additive and the micro powder to obtain a mixture A, mixing the waste refractory material, the high-aluminum powder and the binding agent to obtain a mixture B, and fully stirring and mixing the mixture A and the mixture B to obtain the refractory castable.
Example 2:
the embodiment provides a refractory castable, which mainly comprises the following raw materials in parts by weight: 72 parts of waste refractory materials, 13 parts of high-alumina powder, 8 parts of micro powder, 4 parts of bonding agents and 2 parts of additives;
the waste refractory material is an aluminum-silicon refractory material, and the particle size of the waste refractory material is less than 30mm; the chemical components are as follows: al (aluminum) 2 O 3 Is 55wt% SiO 2 The content of (A) is as follows: 42 wt.% CaO, mgO, fe 2 O 3 The total content of the components is 3wt%; the micro powder is prepared by mixing alumina micro powder with the particle size of less than 5um and silicon micro powder with the particle size of less than 1um according to the mass ratio of 1; the grain diameter of the high-aluminum powder is 200 meshes, and the main chemical component of the high-aluminum powder is Al 2 O 3 85wt% of Fe 2 O 3 The content of (A) is 2%; the binding agent is pure calcium aluminate cement; the additive is obtained by mixing phosphate (sodium tripolyphosphate and sodium hexametaphosphate) and organic fiber according to the mass ratio of 2;
the embodiment also provides a preparation method of the refractory castable, which specifically includes: and (3) premixing the additive and the micro powder to obtain a mixture A, then mixing the waste refractory material, the high-alumina powder and the binding agent to obtain a mixture B, and fully stirring and mixing the mixture A and the mixture B to obtain the refractory castable.
Example 3:
the embodiment provides a refractory castable, which mainly comprises the following raw materials in parts by weight: 80 parts of waste refractory materials, 10 parts of high-alumina aggregate, 25 parts of high-alumina powder, 10 parts of micro powder, 5 parts of bonding agents and 3 parts of additives;
the waste refractory material is an aluminum-silicon refractory material, and the particle size of the waste refractory material is less than 30mm; the chemical components are as follows: al (Al) 2 O 3 Is 52wt% SiO 2 The content of (A) is as follows: 43wt% CaO, mgO, fe 2 O 3 The total content of the components is 3wt%; the micro powder is obtained by mixing alumina micro powder with the particle size of less than 5um and silicon micro powder with the particle size of less than 1um according to the mass ratio of 1; the grain diameter of the high-aluminum powder is 300 meshes, and the main chemical component of the high-aluminum powder is Al 2 O 3 85wt% of Fe 2 O 3 The content of (A) is 1%; the binding agent is pure calcium aluminate cement; the additive is obtained by mixing phosphate (sodium tripolyphosphate and sodium hexametaphosphate) and organic fiber according to the mass ratio of 1;
the embodiment also provides a preparation method of the refractory castable, which specifically comprises the following steps: and (3) premixing the additive and the micro powder to obtain a mixture A, then mixing the waste refractory material, the high-alumina powder and the binding agent to obtain a mixture B, and fully stirring and mixing the mixture A and the mixture B to obtain the refractory castable.
Example 4:
the embodiment provides a steelmaking cover, and the manufacturing method of the steelmaking cover comprises the following steps:
(1) Selection of a pouring material: pouring materials A are used around the ladle cover impact hole, and pouring materials B are used at other parts; the castable B is the refractory castable described in embodiment 1, and the castable A is composed of the following raw materials in parts by weight: 70 parts of high-aluminum aggregate, 16 parts of high-aluminum powder, 8 parts of fine powder, 4 parts of bonding agent and 2 parts of additive; al in high-aluminum bone powder in castable A 2 O 3 80.52% Fe 2 O 3 The content is 1.56%; al in high-aluminum powder 2 O 3 80.52% of Fe 2 O 3 The content is 1.92%; the binder and additive are the same as those described in example 2;
(2) The pouring mode comprises the following steps: adding the casting material into a stirrer, performing dry mixing and stirring for 4 minutes, then adding a proper amount of tap water, stirring for 3-5 minutes to obtain a proper state, then removing air through a vibration rod or a flat vibrator, and vibrating to be compact, thus completing casting;
(3) And curing the ladle cover for 36 hours after pouring, then baking (baking temperature is 200-500 ℃, and the specific baking temperature is determined according to the field working conditions), and then sending to a steel mill field for use.
Example 5:
this comparative example provides a steelmaking vessel cover which was manufactured in a manner substantially the same as that of example 4 except that the castable material B of example 5 was the castable refractory material described in example 2.
Example 6:
this comparative example provides a steelmaking vessel cover produced in substantially the same manner as in example 4, except that the castable material B of example 5 was the castable refractory material described in example 3.
Comparative example 1:
the comparative example provides a steelmaking vessel cover, the manufacturing method of the vessel cover is basically the same as that of the embodiment 4, and the only difference is that the castable A of the comparative example is the same as the castable A in the embodiment 4.
Comparative example 2:
the present comparative example provides a steelmaking cover, which is basically the same as example 4 in the manufacturing method thereof, except that the steelmaking cover of the present comparative example is cast in the following manner: adding the casting material into a stirrer, adding a proper amount of tap water, stirring for 3-5 minutes to obtain a proper state, then removing air through a vibration rod or a flat vibrator, and vibrating to be compact, thus finishing casting.
To illustrate the practical application of the ladle covers manufactured by using the refractory castable of the present application, the applicant compared the various properties of the steelmaking ladle covers and the practical application of the ladle covers when the steelmaking ladle covers described in examples 4-6 and comparative examples 1-2 are applied to different steel mills, as shown in tables 1 and 2:
TABLE 1 ladle cover performance of each group
The results in table 1 show that, compared with the method of using the high-strength castable (i.e. castable A + castable B) instead of the high-strength castable (castable A) in the non-impact area, the ladle cover has qualified compressive strength, and can produce a large output value scale due to the fact that the ladle cover is used all year round and has a large quantity. Applicants further compared the use of the pack as shown in table 2:
TABLE 2 comparison of the use of the lids
In the table, the test steel mills are A steel mill, B steel mill and C steel mill, and the maintenance requirements are different and the service life difference is larger due to different working conditions of different steel mills.
From the results in table 2, it can be seen that the use of the non-impact region according to the invention instead of the high-strength casting material (casting material a + casting material B according to the invention) leads to an increase in the service life of the ladle and a reduction in the production costs in comparison with the total use of the high-strength casting material (casting material a).
According to the ladle cover, the high-performance refractory castable, namely the castable A, is used at the position with severe working conditions, and the novel invention material, namely the castable B, is used at other positions for composite use, so that various performances of the ladle cover are greatly improved, the manufacturing cost of the ladle cover is obviously reduced, a good using effect is provided for a steel mill, and good economic benefits are brought to ladle cover production enterprises.
The above examples merely represent some embodiments of the invention, which are described in more detail and in greater detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The refractory castable is characterized by mainly comprising the following raw materials in parts by weight: 40-80 parts of waste refractory materials, 0-20 parts of high-alumina aggregate, 10-25 parts of high-alumina powder, 5-10 parts of micro powder, 2-5 parts of binding agents and 0.5-3 parts of additives.
2. The castable refractory according to claim 1, wherein the castable refractory mainly comprises the following raw materials in parts by weight: 60 parts of waste refractory materials, 10 parts of high-alumina aggregate, 18 parts of high-alumina powder, 7 parts of micro powder, 3 parts of bonding agents and 2 parts of additives.
3. The castable refractory according to claim 1, wherein the waste refractory material is an aluminium-silicon refractory material with a particle size of less than 30mm.
4. The refractory castable according to claim 1, wherein the micro powder is obtained by mixing alumina micro powder with a particle size of less than 5um and silica micro powder with a particle size of less than 1um according to a mass ratio of 1.
5. The castable refractory according to claim 1, wherein the high-alumina powder has a particle size of 200-300 meshes, and the main chemical component of the high-alumina powder is Al 2 O 3 The content is 75-90wt%.
6. The castable refractory according to claim 1, wherein the binder is pure calcium aluminate cement.
7. The castable refractory according to claim 1, wherein the additive is obtained by mixing phosphate and organic fiber according to a mass ratio of 1-2.
8. A method of preparing a refractory castable material according to claims 1-7, comprising the steps of: and premixing the additive and the micro powder to obtain a mixture A, mixing the waste refractory material, the high-aluminum powder and the binding agent to obtain a mixture B, and fully stirring and mixing the mixture A and the mixture B to obtain the refractory castable.
9. A method of manufacturing a steelmaking vessel cover using a castable refractory according to claims 1 to 7.
10. The method of claim 9, including manufacturing the steelmaking cover from a castable refractory as a castable casting material.
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| CN202211040383.6A CN115650737A (en) | 2022-08-29 | 2022-08-29 | Refractory castable and application thereof |
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| CN202211040383.6A CN115650737A (en) | 2022-08-29 | 2022-08-29 | Refractory castable and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010019748A (en) * | 1999-08-30 | 2001-03-15 | 신현준 | MONOLITHIC REFRACTORIES UTILIZED SPENT Mg-Cr BRICK |
| CN105565830A (en) * | 2015-12-14 | 2016-05-11 | 武汉钢铁(集团)公司 | Composite material RH finery dipping pipe outer wrapping body and molding process thereof |
| CN110885252A (en) * | 2019-12-17 | 2020-03-17 | 攀枝花钢城集团有限公司 | Aluminum-silicon refractory castable for ladle cover of steelmaking tundish and preparation and use methods thereof |
| CN112500175A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Light high-strength steel ladle permanent layer castable and preparation method thereof |
| CN112694338A (en) * | 2020-12-30 | 2021-04-23 | 北京利尔高温材料股份有限公司 | Environment-friendly castable for refractory prefabricated member and preparation method thereof |
-
2022
- 2022-08-29 CN CN202211040383.6A patent/CN115650737A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010019748A (en) * | 1999-08-30 | 2001-03-15 | 신현준 | MONOLITHIC REFRACTORIES UTILIZED SPENT Mg-Cr BRICK |
| CN105565830A (en) * | 2015-12-14 | 2016-05-11 | 武汉钢铁(集团)公司 | Composite material RH finery dipping pipe outer wrapping body and molding process thereof |
| CN110885252A (en) * | 2019-12-17 | 2020-03-17 | 攀枝花钢城集团有限公司 | Aluminum-silicon refractory castable for ladle cover of steelmaking tundish and preparation and use methods thereof |
| CN112694338A (en) * | 2020-12-30 | 2021-04-23 | 北京利尔高温材料股份有限公司 | Environment-friendly castable for refractory prefabricated member and preparation method thereof |
| CN112500175A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Light high-strength steel ladle permanent layer castable and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 顾立德等: "《无机非金属材料工艺学》", 中国科学技术大学出版社, pages: 423 * |
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