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Casting material, steady-flow slag-retaining bucket prepared with the same, and their preparation method

A technology of castable and steady flow, which is applied in the field of refractory materials, can solve the problems of low service life of the steady flow slag retaining bucket, and achieve the effects of good high-temperature chemical stability, increased service life, and good ability to resist erosion of molten steel

Active Publication Date: 2019-01-29
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long-term erosion of the steady flow slag bucket by molten steel, the service life of the steady flow slag bucket is relatively low. The current service life is only 15 to 24 hours, which is far lower than the 40-hour service life of ordinary current stabilizers. The important reason why the flow blocking slag bucket has not completely replaced the ordinary flow stabilizer

Method used

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  • Casting material, steady-flow slag-retaining bucket prepared with the same, and their preparation method
  • Casting material, steady-flow slag-retaining bucket prepared with the same, and their preparation method
  • Casting material, steady-flow slag-retaining bucket prepared with the same, and their preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A castable for a tundish steady-flow slag-retaining barrel, the raw material formula of which is shown in Table 1:

[0034] Weigh various materials according to the proportions stated in Table 1, put them into a mixer and mix and stir for 3 to 5 minutes, then add water (the amount of water added is 5% to 8% of the total weight of the materials) and mix and stir for 7 to 10 minutes, inject the fixed Vibration molding in a good mold. After pouring and molding, it is cured for 48 hours to demould, and then naturally cured for 3 days, then baked at 260°C for 48 hours, and can be put into use after natural cooling. Its main physical and chemical indicators are as follows:

[0035] Refractory temperature (℃): ≥1700;

[0036] Bulk density (g / cm 3 ): 2.7(260℃×48h); 3.1(1650℃×24h);

[0037] Compressive strength (MPa): 42(260℃×48h); 73(1650℃×24h);

[0038] Flexural strength (MPa): 10(260℃×48h); 19(1650℃×24h);

[0039] Line change after burning (%): ±0.1(1650℃×24h);

[0040...

Embodiment 2

[0042] A castable for a tundish steady-flow slag-retaining barrel, the raw material formula of which is shown in Table 1:

[0043] The method of preparing the tundish steady-flow slag-retaining bucket with this castable is the same as that in Example 1, and its main physical and chemical indicators are as follows:

[0044] Refractory temperature (℃): ≥1700;

[0045] Bulk density (g / cm 3 ): 2.8(260℃×48h); 3.2(1650℃×24h);

[0046] Compressive strength (MPa): 44(260℃×48h); 75(1650℃×24h);

[0047] Flexural strength (MPa): 11(260℃×48h); 20(1650℃×24h);

[0048] Line change after burning (%): ±0.1(1650℃×24h);

[0049] The service life is 58 hours.

Embodiment 3

[0051] A castable for a tundish steady-flow slag-retaining barrel, the raw material formula of which is shown in Table 1:

[0052] The method of preparing the tundish steady-flow slag-retaining bucket with this castable is the same as that in Example 1, and its main physical and chemical indicators are as follows:

[0053] Refractory temperature (℃): ≥1700;

[0054] Bulk density (g / cm 3 ): 2.7(260℃×48h); 3.1(1650℃×24h);

[0055] Compressive strength (MPa): 41(260℃×48h); 70(1650℃×24h);

[0056] Flexural strength (MPa): 10(260℃×48h); 17(1650℃×24h);

[0057] Line change after burning (%): ±0.1(1650℃×24h);

[0058] The service life is 52 hours.

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Abstract

The invention discloses a castable, a current stabilization slag ladle prepared from the same as well as preparation methods thereof. The castable is prepared form the following raw material ingredients in percentage by weight: 15-30% of Al-Mg spinel with granularity of 5-8mm, 10-30% of forsterite with granularity of 3-5mm, 10-15% of kyanite with granularity of 1-3mm, 7-20% of fused corundum with granularity of 1-3mm, 5-20% of Si2ON2 with granularity less than or equal to 1mm, 5-15% of TiO2 with granularity less than or equal to 1mm, 1-5% of Fe2O3 with granularity of 180 meshes and 2-8% of silicon micropowder with granularity less than 0.088mm, as well as a water reducer which accounts for 0.1-0.3% of the total weight of the above raw material ingredients. The repairing material has the advantages of high strength, long service life, high temperature resistance, scouring resistance, erosion resistance, high peeling capability and the like.

Description

technical field [0001] The invention belongs to the field of refractory materials for tundish steady-flow slag-retaining barrels in the iron and steel industry, and specifically relates to a castable for tundish steady-flow slag-retaining barrels and a preparation method thereof, and also relates to a tundish steady-flow slag-retaining barrel A tundish steady-flow slag-retaining barrel prepared from castables for barrels and a preparation method thereof. Background technique [0002] At present, in order to protect the molten steel from scouring the bottom of the tundish and improve the service life of the tundish, most tundishes are equipped with flow stabilizers. The flow stabilizer is installed at the bottom of the impact area of ​​the tundish to stabilize the flow of molten steel in the nozzle area of ​​the tundish, reduce the erosion of the molten steel on the tundish, and protect the wall of the tundish. However, ordinary current stabilizers are used in the continuous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 王长宝邹仲平吕同军
Owner SHANDONG IRON & STEEL CO LTD
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