Refractory castable for lime spray gun as well as preparation method and application of refractory castable

A technology of refractory castables and spray guns, applied in the field of refractory materials, can solve problems such as short service life, achieve the effects of improving service life, optimizing construction performance and comprehensive performance, and reducing the amount of water added in construction

Active Publication Date: 2022-07-19
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] KR (Kanbara reactor) mechanical stirring method is to dip the cross-shaped stirring head, which is poured with refractory material and baked, into a certain depth in the ladle molten pool, and rotate it The generated vortex, the weighed desulfurizer is added to the surface of the molten iron by the feeder, and is drawn into the molten iron by the vortex to make the calcium oxide-based desulfurization powder fully contact and react with the molten iron to achieve the purpose of desulfurization; the desulfurizer is mainly lime powder, Blow lime powder into the molten iron through the lime spray gun to remove the sulfur in the molten iron; 1400°C, it has to withstand frequent extreme cold and extreme heat and the erosion of splashed iron slag, resulting in a short service life, only about 20 furnaces

Method used

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  • Refractory castable for lime spray gun as well as preparation method and application of refractory castable
  • Refractory castable for lime spray gun as well as preparation method and application of refractory castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] As shown in Table 1, the refractory castable for lime spray gun provided in the present embodiment includes raw material and water reducing agent; the raw material includes the following components by weight percentage:

[0062] M70 sintered mullite: 28%, particle size is 0.044~5mm;

[0063]Burnt gemstone: 40%, particle size ≤8mm;

[0064] Calcium titanate aluminate: 7%, particle size is 0.044~3mm;

[0065] Ceramic micropowder: 15%, particle size D 50 = 1 μm;

[0066] Waxstone: 10%, particle size is 1~3mm;

[0067] Pure calcium aluminate cement: 0.7%, particle size ≤180 mesh;

[0068] Microsilica: 1.5%, particle size D 50 ≤0.5μm;

[0069] The water reducing agent is an inorganic water reducing agent sodium tripolyphosphate, which is 0.030wt% of the total raw materials.

[0070] In the refractory castable for lime spray gun in this embodiment, the mass percentage content of alumina is 70-72%, and the content of iron oxide is less than or equal to 0.5wt%;

[0071]...

Embodiment 2

[0073] As shown in Table 1, the refractory castable for lime spray gun provided in the present embodiment includes raw material and water reducing agent; the raw material includes the following components by weight percentage:

[0074] M70 sintered mullite: 30%, particle size is 0.044~5mm;

[0075] Burnt gemstone: 38%, particle size ≤8mm;

[0076] Calcium titanate aluminate: 7%, particle size is 0.044~3mm;

[0077] Ceramic micropowder: 14%, particle size D 50 = 1 μm;

[0078] Waxstone: 10.5%, particle size is 1-3mm;

[0079] Pure calcium aluminate cement: 1.0%, particle size ≤180 mesh;

[0080] Silicon micropowder: 1.6%, the particle size is D50≤0.5μm;

[0081] The water reducing agent is an inorganic water reducing agent sodium tripolyphosphate, which is 0.032wt% of the total weight of the raw materials.

[0082] In the refractory castable for lime spray gun in this embodiment, the mass percentage content of alumina is 70-71%, and the content of iron oxide is less than ...

Embodiment 3

[0085] As shown in Table 1, the refractory castable for lime spray gun provided in the present embodiment includes raw material and water reducing agent; the raw material includes the following components by weight percentage:

[0086] M70 sintered mullite: 28%, particle size is 0.044~5mm;

[0087] Burnt gemstone: 37%, particle size ≤8mm;

[0088] Calcium titanate aluminate: 7%, particle size is 0.044~3mm;

[0089] Ceramic micropowder: 13%, particle size D 50 = 1 μm;

[0090] Waxstone: 11%, particle size is 1-3mm;

[0091] Pure calcium aluminate cement: 1.2%, particle size ≤180 mesh;

[0092] Microsilica: 1.7%, particle size D 50 ≤0.5μm;

[0093] The water reducing agent is an inorganic water reducing agent sodium tripolyphosphate, which is 0.034wt% of the raw material.

[0094] In the refractory castable for lime spray gun in this embodiment, the mass percentage content of alumina is 70-72%, and the content of iron oxide is ≤0.5wt%

[0095] Sample detection: the raw m...

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Abstract

The invention discloses a refractory castable for a lime spray gun as well as a preparation method and application of the refractory castable. The refractory castable for the lime spray gun comprises raw materials and a water reducing agent, the raw materials comprise the following components in percentage by weight: 28-30% of M70 sintered mullite; 35-40% of flint clay; 5-7% of titanium calcium aluminate; 11 to 15% of ceramic micro powder; 10 to 12 percent of agalmatolite; 0.7%-1.2% of pure calcium aluminate cement; 1.5 to 2.0 percent of silica powder; and the water reducing agent accounts for 0.03-0.06 wt% of the raw materials. By designing the components and proportion of the refractory castable for the lime spray gun, the lime spray gun can have good high-temperature mechanical strength, thermal shock resistance stability and slag corrosion resistance at the temperature of 1350-1400 DEG C, so that the refractory castable has good service life.

Description

technical field [0001] The invention belongs to the field of refractory materials, and relates to a refractory castable for lime spray guns, a preparation method and application thereof, and more particularly to a refractory castable for lime spray guns in a KR (Kanbara reactor) mechanical stirring desulfurization process. Background technique [0002] KR (Kanbara reactor) mechanical stirring method is to immerse the cross-shaped stirring head, which is poured with refractory material and baked, into the molten iron ladle to a certain depth, and the vortex generated by its rotation is used to add the weighed desulfurizer from the feeder. It reaches the surface of the molten iron and is swept into the molten iron by the vortex to make the calcium oxide-based desulfurization powder fully contact and react with the molten iron to achieve the purpose of desulfurization; the desulfurization agent mainly uses lime powder, and the lime powder is blown into the molten iron through a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B35/66C21C1/02C21C7/064
CPCC04B33/13C04B35/66C21C1/02C21C7/064C04B2235/3463C04B2235/3236C04B2235/3208C04B2235/3222C04B2235/3418C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/96C04B2235/9607C04B2235/9615C04B2235/9669
Inventor 顾军伟朱宏吴亚明罗晓峰于燕文
Owner BAOSHAN IRON & STEEL CO LTD
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