CN104609872A - Titanium-containing calcium aluminate-high alumina bauxite modified refractory material, as well as preparation method and application thereof - Google Patents
Titanium-containing calcium aluminate-high alumina bauxite modified refractory material, as well as preparation method and application thereof Download PDFInfo
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- CN104609872A CN104609872A CN201510013589.3A CN201510013589A CN104609872A CN 104609872 A CN104609872 A CN 104609872A CN 201510013589 A CN201510013589 A CN 201510013589A CN 104609872 A CN104609872 A CN 104609872A
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- calcium aluminate
- alumine
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Abstract
The invention discloses a titanium-containing calcium aluminate-high alumina bauxite modified refractory material, as well as a preparation method and application thereof, belongs to the field of refractory materials, and adopts the technical scheme that the modified refractory material comprises 25 to 40 wt% of high alumina bauxite, 25 to 40 wt% of titanium-containing calcium aluminate, and 30 to 35 wt% of co-ground powder, and a phenolic resin binding agent which accounts for 3 to 6 wt% of the total mass of the raw materials is additionally added, wherein the co-ground powder is formed by uniformly mixing titanium-containing calcium aluminate fine powder, alpha-Al2O3 micro-powder, graphite powder, silicon carbide fine powder, graphite powder, silicon carbide fine powder, metal aluminum powder and high-temperature asphalt powder; titanium-containing calcium aluminate comprises the following ingredients by ratio: 76.21% of Al2O3, 10.6% of TiO2, 10.16% of CaO, 0.6% of Fe2O3, 1.82% of MgO, and 0.62% of SiO2. According to the invention, titanium-containing calcium aluminate being industrial slag of steelmaking is effectively recycled, so as to greatly reduce the production and manufacture cost; as titanium-containing calcium aluminate is a solid solution of calcium hexaluminate, calcium dialuminate, aluminum titanate, calcium titanate and rutile, the modified refractory material is favorable in thermal shock resistance and heat-insulating property.
Description
Technical field
The invention belongs to fire resisting material field, particularly relate to a kind of titanium calcium aluminate-alumine modification refractory materials and its preparation method and application.
Background technology
Along with the development of quick, high efficiency continuous casting and Secondary Refining Technology and technique, slide gate nozzle system becomes more and more important in modern steel smelting process, becomes indispensable part in smelting.It is the control device of molten steel in continuous caster casting cycle, accurately can regulate the discharge from ladle to continuous casting production, makes the molten steel of inflow and outflow reach balance, thus continuous casting operation is more easily controlled.Slide gate nozzle system is good because of its controllability, can improve STEELMAKING PRODUCTION efficiency and obtain to develop rapidly.
Slide gate nozzle system is made up of drive unit, mechanical part and refractory materials part (namely going up lower skateboard, lower nozzle brick), when lower nozzle brick in this system is on active service, exist between its surfaces externally and internally by thermal stresses that thermograde is formed, when thermal stresses exceedes the ultimate stress value of lower nozzle brick, lower nozzle brick generation brittle rupture; Lower nozzle brick is in hot environment always in-service in addition, makes lower nozzle brick easily become loose porous, strength degradation because of oxidation, during casting molten steel wash away and erosion makes damage aggravation, thus affect its stability in use and security.The lower nozzle brick that Most current refractory materials producer produces is main mainly with corundum, Al_2O_3-C based, and wherein the lower nozzle brick of corundum has good use properties, but high cost; Al_2O_3-C based lower nozzle brick advantage of lower cost, not resistant to corrosion, the life-span is low, use properties fluctuation is comparatively large, have impact on the safety in production of iron and steel enterprise.
Summary of the invention
In order to overcome the defect of prior art, the object of this invention is to provide a kind of titanium calcium aluminate-alumine modification refractory materials, improving use properties, reduce production cost.
Another object of the present invention is to provide the preparation method of this refractory materials.
Another object of the present invention is to provide the application of this refractory materials.
Object of the present invention realizes by following technical scheme:
A kind of titanium calcium aluminate-alumine modification refractory materials, its proportioning raw materials is: 25wt% ~ 40wt%(" % " represents mass percent, with raw material total mass for benchmark, alumine, the titanium calcium aluminate of 25 wt% ~ 40 wt%, the common abrasive dust of 30 wt% ~ 35 wt% and the additional phenolic resin binder accounting for raw material total mass 3 wt% ~ 6 wt% down together), wherein said common abrasive dust is by titanium calcium aluminate fine powder, α-Al
2o
3micro mist, Graphite Powder 99, carbide fine powder, metallic aluminium powder and hard pitch powder mix obtained; Wherein said titanium calcium aluminate composition proportion is: Al
2o
376.21%, TiO
210.6%, CaO10.16%, Fe
2o
30.6%, MgO1.82%, SiO
20.62%(with the quality of titanium calcium aluminate for benchmark).
Preferably, described common abrasive dust composition proportion is as follows:
| Title | Proportioning |
| Titanium calcium aluminate fine powder | 15 wt% |
| α-Al 2O 3Micro mist | 8 wt% |
| 95SiC fine powder | 5 wt% |
| Metallic aluminium powder | 4 wt% |
| 95 Graphite Powder 99s | 2 wt% |
| High temperature pitch prill powder | 1 wt% |
Preferably, described alumine grain size distribution is as follows:
| Granularity | Proportioning |
| 5～3mm | 5wt% |
| 3～1mm | 15 wt %～20 wt % |
| 1～0mm | 5 wt %～15 wt % |
Preferably, described titanium calcium aluminate grain size distribution is as follows:
| Granularity | Proportioning |
| 5～3mm | 5wt% |
| 3～1mm | 10 wt %～15 wt % |
| 1～0mm | 10 wt %～20 wt % |
The preparation method of described titanium calcium aluminate-alumine modification refractory materials, specifically carries out according to the following steps:
1) preparation abrasive dust altogether: according to mentioned component proportioning by titanium calcium aluminate fine powder, α-Al
2o
3micro mist, Graphite Powder 99, carbide fine powder, metallic aluminium powder and hard pitch powder mix, and make common abrasive dust;
2) prepare burden: prepare burden by above-mentioned alumine grain size distribution, the grain size distribution of titanium calcium aluminate;
3) batch mixing: titanium calcium aluminate and alumine particle are dry mixed 2 ~ 3 minutes by above-mentioned raw materials proportioning edge runner-wet mill, then slowly add 3wt % ~ 6wt% phenolic resin binder, finally add the common abrasive dust of above-mentioned raw materials proportioning, mixes discharging after 20 ~ 30 minutes;
4) shaping: by compound compression moulding on 630t electric screw brick press;
5) thermal treatment: select dry kiln, need thermal treatment more than 48 hours, wherein enter kilneye temperature 50 C, baking time more than 8 hours, 110 DEG C of baking times more than 12 hours, 200 ~ 250 DEG C of baking times more than 12 hours, 250 ~ 350 DEG C of baking times more than 16 hours;
6) kiln discharge selection: select qualified product.
The application in collector nozzle of ladle brick prepared by described titanium calcium aluminate-alumine modification refractory materials.
The titanium calcium aluminate that the present invention introduces, as the industrial residue of steel-making, is effectively recycled, is significantly reduced manufacturing cost; Titanium calcium aluminate is the sosoloid of calcium hexaluminate, Calcium dialuminate, aluminium titanates, calcium titanate and Rutile Type, wherein thing phase calcium hexaluminate and Calcium dialuminate have higher fusing point, lower thermal expansivity, refractory materials is made to obtain good thermal shock resistance, in addition calcium hexaluminate has en plaque crystalline structure, can improve the heat-proof quality of refractory materials; Aluminium titanates, calcium titanate have high-melting-point, low-expansion coefficient equally, the high and good thermal shock of refractoriness; In applied at elevated temperature process, there is chemical reaction between rutile and other things phase, generate dystectic material, strengthen fire performance further.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is titanium calcium aluminate-alumine modification refractory materials preparation technology schema.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1 takes raw material according to the formula of table 1.
As shown in Figure 1, the preparation method of described titanium calcium aluminate-alumine modification refractory materials, specifically carries out according to the following steps:
1) preparation abrasive dust altogether: according to 15 wt% by titanium calcium aluminate fine powder, 8 wt% α-Al
2o
3micro mist, 5 wt% Graphite Powder 99s, 4 wt% carbide fine powder, 2 wt% metallic aluminium powders and 1 wt% hard pitch powder mix obtained, make common abrasive dust;
2) prepare burden: prepare burden by 5 ~ 3mm alumine 5wt%, 3 ~ 1mm alumine 20wt%, 1 ~ 0mm alumine 15wt%, 5 ~ 3mm titanium calcium aluminate 5wt%, 3 ~ 1mm titanium calcium aluminate 15wt%, 1 ~ 0mm titanium calcium aluminate 10wt% prepare burden;
3) batch mixing: the alumine particle edge runner-wet mill of the titanium calcium aluminate of 40wt% and 30wt% is dry mixed 2 ~ 3 minutes, then slowly adds 3 ~ 6% phenolic resin binders, finally add the common abrasive dust of 30wt%, mixes discharging after 20 ~ 30 minutes;
4) shaping: by compound compression moulding on 630t electric screw brick press;
5) thermal treatment: need thermal treatment more than 48 hours, wherein enter kilneye temperature 50 C, baking time more than 8 hours, 110 DEG C of baking times more than 12 hours, 200 ~ 250 DEG C of baking times more than 12 hours, 250 ~ 350 DEG C of baking times more than 16 hours;
6) kiln discharge selection: select qualified product.
Embodiment 2 preparation method, with embodiment 1, prepares titanium calcium aluminate-alumine modification refractory materials according to the formula shown in table 1.
Embodiment 3 preparation method, with embodiment 1, prepares titanium calcium aluminate-alumine modification refractory materials according to the formula shown in table 1.
Embodiment 4 preparation method, with embodiment 1, prepares titanium calcium aluminate-alumine modification refractory materials according to the formula shown in table 1.
Table 1
By the titanium calcium aluminate-alumine modification refractory materials obtained in above-described embodiment, be used for preparing collector nozzle of ladle brick.The physicochemical property of collector nozzle of ladle brick of the present invention and existing Al_2O_3-C based collector nozzle of ladle brick and mean life parameter comparison in table 2.
Table 2
Can learn from table 2, lower nozzle brick of the present invention is on probation on ladle, and carried out the analysis such as erosion, crackle to lower nozzle brick and currently available products after off-test, work-ing life 3 ~ 4 times/set, blowhole is expanding: average erosion 4.5mm; Average erosion rate 1.3mm/ time.By analyzing with currently available products measurement of comparison, the average erosion rate of lower nozzle brick of the present invention is≤1.3mm/ time, and far below the erosion rate >=1.8mm/ time of existing Al_2O_3-C based product, its corrosion-resistant property, applied at elevated temperature performance all exceed the performance of currently available products.
Claims (6)
1. titanium calcium aluminate-alumine modification refractory materials, it is characterized in that its proportioning raw materials is: the common abrasive dust of the alumine of 25wt% ~ 40wt%, the titanium calcium aluminate of 25 wt% ~ 40 wt%, 30 wt% ~ 35 wt% and the additional phenolic resin binder accounting for raw material total mass 3 wt% ~ 6 wt%, wherein said common abrasive dust is by titanium calcium aluminate fine powder, α-Al
2o
3micro mist, Graphite Powder 99, carbide fine powder, metallic aluminium powder and hard pitch powder mix obtained; Wherein said titanium calcium aluminate composition proportion is: Al
2o
376.21%, TiO
210.6%, CaO10.16%, Fe
2o
30.6%, MgO1.82%, SiO
20.62%.
2. titanium calcium aluminate according to claim 1-alumine modification refractory materials, is characterized in that described common abrasive dust composition proportion is as follows:
。
3. titanium calcium aluminate according to claim 1-alumine modification refractory materials, is characterized in that described alumine grain size distribution is as follows:
。
4. titanium calcium aluminate according to claim 1-alumine modification refractory materials, is characterized in that described titanium calcium aluminate grain size distribution is as follows:
。
5. the preparation method of the titanium calcium aluminate according to any one of Claims 1 to 4 item-alumine modification refractory materials, specifically carries out according to the following steps:
1) preparation abrasive dust altogether: according to 15 wt% by titanium calcium aluminate fine powder, 8 wt% α-Al
2o
3micro mist, 5 wt% Graphite Powder 99s, 4 wt% carbide fine powder powder, 2 wt% metallic aluminium powders and 1 wt% hard pitch powder mix obtained, make common abrasive dust;
2) prepare burden: prepare burden by 5 ~ 3mm alumine 5wt%, 3 ~ 1mm alumine 20wt%, 1 ~ 0mm alumine 15wt%, 5 ~ 3mm titanium calcium aluminate 5wt%, 3 ~ 1mm titanium calcium aluminate 15wt%, 1 ~ 0mm titanium calcium aluminate 10wt% prepare burden;
3) batch mixing: the alumine particle edge runner-wet mill of the titanium calcium aluminate of 25wt% ~ 40wt% and 25wt% ~ 40wt% is dry mixed 2 ~ 3 minutes, then 3 ~ 6% phenolic resin binders are slowly added, finally add the common abrasive dust of 30wt% ~ 35wt%, mix discharging after 20 ~ 30 minutes;
4) shaping: by compound compression moulding on 630t electric screw brick press;
5) thermal treatment: need thermal treatment more than 48 hours, wherein enter kilneye temperature 50 C, baking time more than 8 hours, 110 DEG C of baking times more than 12 hours, 200 ~ 250 DEG C of baking times more than 12 hours, 250 ~ 350 DEG C of baking times more than 16 hours;
6) kiln discharge selection: select qualified product.
6. the application in collector nozzle of ladle brick prepared by the titanium calcium aluminate according to any one of Claims 1 to 4 item-alumine modification refractory materials.
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| CN201510013589.3A CN104609872B (en) | 2015-01-12 | 2015-01-12 | Modified refractory material of a kind of titanium calcium aluminate-alumine and its preparation method and application |
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| CN104609872B CN104609872B (en) | 2016-06-15 |
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| CN105036774A (en) * | 2015-08-04 | 2015-11-11 | 武汉科技大学 | Calcium titanium-aluminate prefabricated part for vanadium smelting reverberatory furnace lining and preparation method thereof |
| CN106001532A (en) * | 2016-05-16 | 2016-10-12 | 辽宁科技大学 | Corundum-zirconia corundum-titanic acid aluminum no-firing no-soaking sliding brick and preparation method thereof |
| CN106746772A (en) * | 2016-11-22 | 2017-05-31 | 上海宝钢工业技术服务有限公司 | Titanium calcium aluminate hollow ball produced using ferrotianium slag and preparation method thereof |
| CN107244906A (en) * | 2017-06-15 | 2017-10-13 | 郑州瑞泰耐火科技有限公司 | Aluminium titanates calcium compound abrasive brick and preparation method thereof |
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| CN111925222A (en) * | 2020-08-05 | 2020-11-13 | 辽宁科技大学 | Method for preparing refractory ball for hot blast furnace by using aluminum titanium slag |
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