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Novel composite current stabilizer and manufacturing method of the novel composite current stabilizer

A flow stabilizer and a new type of technology, applied in the new composite flow stabilizer and its production field, can solve the problem of loss of flow control effect, low service life of flow control device, anti-erosion and anti-scour service life of slag retaining wall and impact plate Low problems, to achieve the effect of increasing the number of pouring furnaces, improving the pass rate, improving the effect of flow control and slag blocking

Active Publication Date: 2012-07-25
鞍山市星火特种耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, in order to improve the molten steel flow field in the continuous casting tundish, prolong the residence time of molten steel in the tundish, and promote the floating and removal of inclusions and slag in the molten steel, many domestic steelmaking plants have installed various This kind of flow control device gradually transitions from the previous slag retaining wall and impact plate products to the use of current stabilizer products. The slag retaining wall and impact plate used in the past adopt magnesium prefabricated structure. The main defect is that the slag retaining wall and impact plate The anti-erosion and anti-scouring service life of the plate is low. Generally, after 8-10 hours, as the erosion of the impact plate accelerates, the flow control effect is gradually lost. The low life of the flow control device has become a bottleneck problem restricting the service life of the continuous casting tundish.

Method used

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  • Novel composite current stabilizer and manufacturing method of the novel composite current stabilizer
  • Novel composite current stabilizer and manufacturing method of the novel composite current stabilizer
  • Novel composite current stabilizer and manufacturing method of the novel composite current stabilizer

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Effect test

Embodiment 1

[0053]The material of the impact plate and casing brick embedded in the novel composite current stabilizer of the present invention is aluminum-magnesium carbon, and the material of the body is magnesium-aluminum-chrome castable, wherein the impact plate and casing brick are mainly composed of the following materials by weight percentage: Brown corundum 80%, of which 5-3mm accounted for 25%, 3-1mm accounted for 29%, 0.075-1mm accounted for 8%, 0.075mm or less accounted for 18%; fused magnesia particle size ≤ 1mm 8%, graphite 2 %, carbon black 2.5%, aluminum powder or silicon powder 4%, binder 3.5%.

[0054] The body is mainly composed of the following materials by weight percentage: high-purity magnesia 51%, of which: 28% of particle size 8-5mm, 15% of 5-3mm, 8% of 3-1mm; brown corundum 18%, of which: 8% of particle size is 3-1mm, and 10% of particle size is less than 1mm; 6% of chrome concentrate particle size ≤1mm, 15% of fused magnesia 180 mesh, 3% of silicon micropowder, 2...

Embodiment 2

[0076] The impact plate and casing brick embedded in the new composite current stabilizer of the present invention are made of aluminum-magnesium carbon, and the material of the body is magnesium-aluminum-chrome castable, wherein the impact plate and casing brick are mainly composed of the following materials by weight percentage : Brown corundum 81%, of which: 5-3mm 24%, 3-1mm 30%, 0.075-1mm 7%, 0.075mm or less 20%, fused 97 magnesia particle size ≤ 1mm 8%, graphite 3% , 2% carbon black, 3% antioxidant, 3% binder.

[0077] The body is mainly composed of the following materials by weight percentage: high-purity magnesia 54%, of which: 29% of particle size 8-5mm, 17% of 5-3mm, 8% of 3-1mm; brown corundum 15%, of which: 7% with a particle size of 3-1mm, 8% with a particle size below 1mm; 6% of chrome concentrate with a particle size of ≤1mm, 15% of fused magnesia 180 mesh, 3% of silicon micropowder, 2% of refractory steel fiber, α-Al 2 o 3 5%, sodium tripolyphosphate 0.1 (addi...

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Abstract

The invention relates to the field of a current stabilizer for a continuous casting tundish, in particular to a novel composite current stabilizer and a manufacturing method of the novel composite current stabilizer. The novel composite current stabilizer comprises a bowl-shaped body with a sinking central part. The novel composite current stabilizer is characterized in that the bottom of the bowl-shaped body is internally provided with an impact plate; the thickness of the impact plate is 90-200mm; the side wall of the bowl-shaped body is provided with round flow guiding holes; each round flow guiding hole is internally embedded with a sleeve brick; and the inner diameter of the sleeve brick is 140-160mm and the wall thickness is 8-15mm. The number of the flow guiding holes is 2-6 and the flow guiding holes are distributed symmetrically. The impact plate and the sleeve bricks are made from an alumina magnesia carbon material; and the bowl-shaped body is made from alumina magnesia chromium castable. Compared with the prior art, the novel composite current stabilizer has the beneficial effects as follows: 1) the novel composite current stabilizer can bear the high-temperature flushing of high-temperature molten steel (1550-1650 DEG C) and has high erosion resistance and thermal shock resistance, and the service life can achieve 20-48 hours; and 2) the impact resistance and the erosion resistance of the current stabilizer are enhanced by the impact plate and the sleeve bricks which are embedded internally and the pass percent of continuous casting billets is further improved.

Description

technical field [0001] The invention relates to the field of continuous casting tundish current stabilizers, in particular to a novel composite current stabilizer and a manufacturing method thereof. Background technique [0002] At present, in order to improve the molten steel flow field in the continuous casting tundish, prolong the residence time of molten steel in the tundish, and promote the floating and removal of inclusions and slag in the molten steel, many domestic steelmaking plants have installed various This kind of flow control device gradually transitions from the previous slag retaining wall and impact plate products to the use of current stabilizer products. The slag retaining wall and impact plate used in the past adopt magnesium prefabricated structure. The main defect is that the slag retaining wall and impact plate The anti-erosion and anti-scouring service life of the plate is low. Generally, after 8-10 hours, as the erosion of the impact plate accelerate...

Claims

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Application Information

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IPC IPC(8): B22D11/10C04B35/103
Inventor 赵英日
Owner 鞍山市星火特种耐火材料有限公司
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