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Air permeable upper downspout of pouring basket in continuous casting

A continuous casting tundish and nozzle brick technology, which is applied to casting equipment, casting molten material containers, manufacturing tools, etc., can solve the problems that the ventilating upper nozzle cannot be adapted, the number of continuous casting can only reach 8 times, and microcracks are easy to occur. , to achieve the effect of high precision in appearance size, prevent adhesion, and prevent shrinkage of pore size

Inactive Publication Date: 2003-07-23
鞍山市耘路耐火材料有限公司
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Problems solved by technology

[0002] The ventilated upper nozzle of the continuous casting tundish is located at the bottom of the tundish, and the lower part is connected with the three-layer slide plate and the submerged nozzle. When in use, argon gas is continuously blown into the molten steel through the metal hose of the upper nozzle, and the argon gas micro-bubbles are attached to the molten steel. Al2O3 and other impurities float up to ensure that the upper nozzle does not form nodules during continuous casting and improve the quality of molten steel. The existing production process of the ventilating upper nozzle of the tundish is backward, and the maximum number of continuous pouring times during use can only reach 8 times. Microcracks are prone to occur during preheating and pouring of the tundish. After use, there are many cracks in the cold state, and the diameter of the inner hole expands by more than 3mm. The number of continuous castings in the steel plant has increased from 7 to 8 to 13 to 14 times. The water mouth can no longer adapt

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  • Air permeable upper downspout of pouring basket in continuous casting
  • Air permeable upper downspout of pouring basket in continuous casting
  • Air permeable upper downspout of pouring basket in continuous casting

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

[0027] Such as figure 1 As shown, the vent 2 of the continuous casting tundish is located at the bottom of the tundish 3, and the lower part is connected with the three-layer slide plate 4 and the submerged nozzle 5. Ventilation upper nozzle 2 tops are stopper rod 1.

[0028] Such as figure 2 As shown, the continuous casting tundish has a ventilating upper nozzle, including a ventilating hollow truncated cone upper nozzle brick 6, an upper steel sleeve 7, and a lower steel sleeve 9. There is an upper steel sleeve 7 and a lower steel sleeve 9 on the outside of the brick 6, and there is a gap between the outer side of the upper nozzle brick 6 and the inner side of the upper steel sleeve 7 and the lower steel sleeve 9, forming an air passage 8 for ventilation. 6. The outer side is bonded to the inner side of the upper steel sleeve 7 and the lower steel sleeve 9...

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Abstract

An air-permeable top sprue of conticasting tundish is composed of a truncated air-permeable hollow conic brick, upper steel sleeve and low steel sleeve. The said truncated brick is prepared from zircon sand, compact corundum and mullite. Its advantages are high resistance to high-temp molten steel flushing, corrosion, and heat shock, not cracking, high air permeability, and not blocking by impurities.

Description

technical field [0001] The invention relates to a functional refractory product for large-scale continuous casting-a ventilating upper nozzle of a continuous casting tundish. Background technique [0002] The ventilated upper nozzle of the continuous casting tundish is located at the bottom of the tundish, and the lower part is connected with the three-layer slide plate and the submerged nozzle. When in use, argon gas is continuously blown into the molten steel through the metal hose of the upper nozzle, and the argon gas micro-bubbles are attached to the molten steel. Al2O3 and other impurities float up to ensure that the upper nozzle does not form nodules during continuous casting and improve the quality of molten steel. The existing production process of the ventilating upper nozzle of the tundish is backward, and the maximum number of continuous pouring times during use can only reach 8 times. Microcracks are prone to occur during preheating and pouring of the tundish. A...

Claims

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Application Information

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IPC IPC(8): B22D11/10B22D41/16B22D41/50B22D41/54
Inventor 刘兵曹学山郑振英
Owner 鞍山市耘路耐火材料有限公司
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