CN111995409B - Medium frequency induction furnace ramming mass based on magnesia-alumina spinel reclaimed materials - Google Patents
Medium frequency induction furnace ramming mass based on magnesia-alumina spinel reclaimed materials Download PDFInfo
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Abstract
The invention relates to a medium-frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials, which comprises the following components in parts by weight: 60-75 parts of magnesium aluminate spinel reclaimed material, 10-20 parts of fused corundum, and alpha-Al 2 O 3 5-10 parts of micro powder, 3-5 parts of calcium carbonate, 3-5 parts of titanium dioxide and 1-1.5 parts of boric acid. The ramming mass prepared by the invention has the advantages of low cost, energy conservation, environmental protection, high refractoriness, high strength and good volume stability.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to a ramming material of a medium-frequency induction furnace based on magnesium aluminate spinel reclaimed materials.
Background
The medium-frequency induction furnace has the advantages of convenient operation, rapid temperature rise, energy conservation and the like, and is widely applied to the industries of casting, heat treatment and the like. The refractory material furnace lining of the medium frequency induction furnace is an important component, the refractory material furnace lining of most medium frequency induction furnaces is a dry ramming material, and the magnesia-alumina spinel is a common main component of the dry ramming material of the medium frequency induction furnace, however, due to increasingly tense mineral resources, the price of the raw material for synthesizing the spinel is continuously increased, so that the preparation of the ramming material by utilizing a large amount of waste spinel which takes the spinel as the main component and is generated in the industries such as cement and the like has very important practical significance.
The Chinese patent with the application number of 201811466855.8 discloses a corundum dry-type ramming mass for a medium-frequency induction furnace and a preparation method thereof, wherein zirconium oxychloride octahydrate is introduced to generate hydrogen chloride which has strong stimulation on a human body at high temperature; a Chinese patent with the patent number of 201710895884.5 discloses a magnesium-calcium ramming mass produced by using waste refractory materials and a manufacturing method thereof, wherein the used organic binding agent consisting of tung oil and the like is easy to generate toxic gas at high temperature; chinese patent application No. 201310425094.2 discloses a ramming mass for an intermediate frequency furnace, which introduces chromium oxide causing serious pollution problems; chinese patent No. 201610667100.9 discloses a ramming mass for an intermediate frequency induction furnace and a preparation method thereof, and the addition of a large amount of aluminum lactate and magnesium lactate causes high cost; the Chinese patent with the application number of 201811397190.X discloses a quartz ramming mass for an induction furnace and a preparation method thereof, and the quartz ramming mass has insufficient volume stability and lower use temperature; the Chinese patent with the application number of 201110317428.5 discloses a ramming material for a metallurgical electromagnetic induction intermediate frequency furnace, and the maximum use temperature of the ramming material is lower due to the fact that a large amount of high-alumina bauxite homogenizing mixed materials are used in the ramming material; the Chinese patent with the application number of 201710497381.2 discloses a ramming mass for a prealloy powder smelting intermediate frequency furnace, and the Chinese patent with the application number of 201910247841.5 discloses a ramming mass for an intermediate frequency furnace and a preparation method thereof, wherein the use of silicon carbide in the two patents hinders the sintering of a ramming mass working surface at a high temperature and reduces the strength of a sintering layer; chinese patent No. 201510623838.0 discloses a dry ramming mass for a furnace body of a medium-frequency induction furnace, wherein introduced boric acid forms a liquid phase at high temperature, so that the high-temperature performance of the ramming mass is reduced; the Chinese patent with the application number of 201510054600.0 discloses an aluminum-magnesium composite ramming mass for a medium-frequency induction furnace, the used raw materials are basically recycled refractory materials with poor activity, and the ramming mass has insufficient sintering strength; chinese patent No. 201610681549.0 discloses an efficient energy-saving magnesium ramming mass prepared by recycling waste magnesium brick material of a cement plant and a preparation process thereof, wherein the waste magnesium brick material has low strength due to overhigh material consumption.
Disclosure of Invention
The invention aims to solve the technical problem of providing a ramming material for a medium-frequency induction furnace based on a magnesia-alumina spinel reclaimed material, and the prepared ramming material has the advantages of low cost, energy conservation, environmental protection, high refractoriness, high strength and good volume stability.
In order to solve the technical problems, the invention provides a ramming material for a medium frequency induction furnace based on a magnesium aluminate spinel reclaimed material, which is characterized by comprising the following components in parts by weight:
preferably, the particle size of the recycled magnesia alumina spinel material is 0.088-5 mm.
Preferably, the recycled magnesia alumina spinel material comprises two specifications of 0.088-3 mm and 3-5 mm in particle size, wherein the specifications comprise the following components in parts by weight:
35 to 40 portions of recycled magnesia alumina spinel with the diameter of 0.088 to 3mm
25-35 parts of 3-4 mm magnesium aluminate spinel reclaimed material.
Preferably, al in the recycled magnesia-alumina spinel material 2 O 3 Is not less than 65 percent by mass, mgO is not less than 15 percent by mass, and SiO 2 Is not more than 15 percent by mass, fe 2 O 3 The mass percentage content of (A) is not more than 3.5%.
Preferably, the particle size of the fused corundum is 0.045-5 mm.
Preferably, al in the fused corundum 2 O 3 The mass percentage of (A) is not less than 94%.
Preferably, the particle size of the calcium carbonate is less than or equal to 0.005mm.
Preferably, caCO in the calcium carbonate 3 The mass percentage of (A) is not less than 98%.
Preferably, the particle size of the titanium dioxide is less than or equal to 0.004mm.
Preferably, tiO in the titanium dioxide 2 The mass percentage of (A) is not less than 98%.
The invention has the beneficial effects that: the invention takes the magnesia-alumina spinel reclaimed material as the main raw material, achieves the aim of resource utilization of solid waste, saves energy, protects environment and reduces cost; the volume change of the ramming mass sintering at high temperature is inhibited through the volume expansion accompanying the process of forming calcium hexaluminate by calcium carbonate and alumina micropowder at high temperature; titanium dioxide is introduced into the matrix to form calcium titanate at high temperature, so that the contact tightness among calcium hexaluminate crystal particles is improved, and the strength is increased. In addition, the titanium dioxide can improve the sintering performance of the magnesium aluminate spinel reclaimed material and improve the compactness of the material.
Detailed Description
Example 1
A medium frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials comprises the following components in parts by weight:
wherein Al in the recovered magnesia-alumina spinel material 2 O 3 The mass percentage of the component (A) is not less than 65%, the mass percentage of the component (B) is not less than 15%, and the mass percentage of the component (B) is SiO 2 Is not more than 15 percent by mass, fe 2 O 3 The mass percentage content of (A) is not more than 3.5%; the granularity of the fused corundum is 0.045-5 mm, and Al in the fused corundum 2 O 3 The mass percentage content of (A) is not less than 94%; the granularity of the calcium carbonate is less than or equal to 0.005mm, and CaCO in the calcium carbonate 3 The mass percentage content of (A) is not less than 98%; the granularity of the titanium dioxide is less than or equal to 0.004mm, and TiO in the titanium dioxide 2 The mass percentage of (A) is not less than 98%.
Example 2
A medium frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials comprises the following components in parts by weight:
wherein Al in the recycled magnesia-alumina spinel material 2 O 3 Is not less than 65 percent by mass, mgO is not less than 15 percent by mass, and SiO 2 Is not more than 15 percent by mass, fe 2 O 3 The mass percentage content of (A) is not more than 3.5%; the granularity of the fused corundum is 0.045-5 mm, and Al in the fused corundum 2 O 3 Quality of (1)The content percentage is not less than 94%; the granularity of the calcium carbonate is less than or equal to 0.005mm, and CaCO in the calcium carbonate 3 The mass percentage content of (A) is not less than 98%; the granularity of the titanium dioxide is less than or equal to 0.004mm, and TiO in the titanium dioxide 2 The mass percentage of (A) is not less than 98%.
Example 3
The medium-frequency induction furnace ramming material based on magnesium aluminate spinel reclaimed materials comprises the following components in parts by weight:
wherein Al in the recycled magnesia-alumina spinel material 2 O 3 The mass percentage of the component (A) is not less than 65%, the mass percentage of the component (B) is not less than 15%, and the mass percentage of the component (B) is SiO 2 Not more than 15% by mass of Fe 2 O 3 The mass percentage content of (A) is not more than 3.5%; the granularity of the fused corundum is 0.045-5 mm, and Al in the fused corundum 2 O 3 The mass percentage content of (A) is not less than 94%; the granularity of the calcium carbonate is less than or equal to 0.005mm, and CaCO in the calcium carbonate 3 The mass percentage content of (A) is not less than 98%; the granularity of the titanium dioxide is less than or equal to 0.004mm, and TiO in the titanium dioxide 2 The mass percentage of (A) is not less than 98%.
Example 4
The medium-frequency induction furnace ramming material based on magnesium aluminate spinel reclaimed materials comprises the following components in parts by weight:
wherein Al in the recycled magnesia-alumina spinel material 2 O 3 Is not less than 65 percent by mass, mgO is not less than 15 percent by mass, and SiO 2 Not more than 15% by mass of Fe 2 O 3 The mass percentage content of (A) is not more than 3.5%; the granularity of the fused corundum is 0.045-5 mm, and Al in the fused corundum 2 O 3 The mass percentage content of (A) is not less than 94%; the granularity of the calcium carbonate is less than or equal to 0.005mm, and CaCO in the calcium carbonate 3 The mass percentage content of (A) is not less than 98%; the granularity of the titanium dioxide is less than or equal to 0.004mm, and TiO in the titanium dioxide 2 The mass percentage of (A) is not less than 98%.
Example 5
A medium frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials comprises the following components in parts by weight:
wherein Al in the recycled magnesia-alumina spinel material 2 O 3 The mass percentage of the component (A) is not less than 65%, the mass percentage of the component (B) is not less than 15%, and the mass percentage of the component (B) is SiO 2 Not more than 15% by mass of Fe 2 O 3 The mass percentage content of (A) is not more than 3.5%; the granularity of the fused corundum is 0.045-5 mm, and Al in the fused corundum 2 O 3 The mass percentage content of (A) is not less than 94%; the granularity of the calcium carbonate is less than or equal to 0.005mm, and CaCO in the calcium carbonate 3 The mass percentage content of (A) is not less than 98%; the granularity of the titanium dioxide is less than or equal to 0.004mm, and TiO in the titanium dioxide 2 The mass percentage of (A) is not less than 98%.
The properties of the ramming mass of the medium frequency induction furnace prepared by the above examples 1-5 based on recycled magnesia alumina spinel are as follows:
according to the performance indexes, the ramming mass of the medium-frequency induction furnace based on the recycled magnesia-alumina spinel material prepared by the invention has good performance.
The invention takes the magnesium aluminate spinel reclaimed material as the main raw material, achieves the purpose of resource utilization of solid waste, saves energy, protects environment and reduces cost; the volume change of the ramming mass sintering at high temperature is inhibited through the volume expansion accompanying the process of forming calcium hexaluminate by calcium carbonate and alumina micropowder at high temperature; titanium dioxide is introduced into the matrix to form calcium titanate at high temperature, so that the contact tightness among calcium hexaluminate crystal particles is improved, and the strength is increased. In addition, the titanium dioxide can improve the sintering performance of the magnesium aluminate spinel reclaimed material and improve the compactness of the material.
The above description is illustrative and not restrictive. Many modifications and variations of the present invention will be apparent to those skilled in the art in light of the above teachings that will fall within the spirit and scope of the present invention.
Claims (4)
1. The medium-frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials is characterized by comprising the following components in parts by weight:
60 to 75 portions of magnesia-alumina spinel reclaimed material
10 to 20 portions of fused corundum
α-Al 2 O 3 5 to 10 portions of
3 to 5 portions of calcium carbonate
3 to 5 parts of titanium dioxide
1 to 1.5 parts of boric acid;
al in the magnesium aluminate spinel reclaimed material 2 O 3 Is not less than 65 percent by mass, mgO is not less than 15 percent by mass, and SiO 2 Is not more than 15 percent by mass, fe 2 O 3 The mass percentage content of (A) is not more than 3.5%;
the particle size of the recycled magnesia-alumina spinel material is 0.088 to 5mm;
the recycled magnesia-alumina spinel material comprises two specifications of 0.088 to 3mm and 3 to 5mm in granularity, and the weight parts of the specifications are as follows:
35 to 40 portions of recycled materials of 0.088 to 3mm magnesium aluminate spinel
25 to 35 parts of recycled magnesia-alumina spinel material of 3 to 5mm;
the granularity of the fused corundum is 0.045 to 5mm;
the granularity of the calcium carbonate is less than or equal to 0.005mm;
the granularity of the titanium dioxide is less than or equal to 0.004mm.
2. The ramming mass for a medium-frequency induction furnace based on magnesia-alumina spinel reclaimed materials according to claim 1, wherein Al in the electro-fused corundum 2 O 3 The mass percentage of (A) is not less than 94%.
3. The medium frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials according to claim 1, characterized in that CaCO in calcium carbonate 3 The mass percentage of (A) is not less than 98%.
4. The medium frequency induction furnace ramming mass based on magnesium aluminate spinel reclaimed materials according to claim 1, wherein the TiO in titanium dioxide is TiO 2 The mass percentage of (A) is not less than 98%.
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| CN114394820B (en) * | 2021-12-29 | 2022-11-08 | 北京金隅通达耐火技术有限公司 | Magnesia-alumina spinel sintered by waste magnesia-alumina brick powder and preparation method thereof |
| CN114180954B (en) * | 2022-02-15 | 2022-05-17 | 北京利尔高温材料股份有限公司 | Environment-friendly low-carbon aluminum-magnesium spinel brick and preparation method thereof |
| WO2024094936A1 (en) | 2022-11-02 | 2024-05-10 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Refractory covering particle composition |
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| CN104446527A (en) * | 2014-10-27 | 2015-03-25 | 朱小英 | Permanent lining ramming material for steel ladle |
| CN109748577A (en) * | 2019-03-29 | 2019-05-14 | 襄阳聚力新材料科技有限公司 | A kind of intermediate frequency furnace ramming mass and preparation method thereof |
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| CN103508740B (en) * | 2012-06-29 | 2015-05-20 | 上海梅山钢铁股份有限公司 | Ramming mass for repairing gap bridge magnesia-alumina spinel bricks of sleeve lime kiln |
| CN104211415A (en) * | 2014-09-02 | 2014-12-17 | 青岛永通电梯工程有限公司 | Corundum-magnesium aluminate spinel refractory material |
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