Ventilation brick with air blow quantity precise control function for steel ladle

Abstract

The invention relates to the technical field of refractory materials, in particular to a ventilation brick with an air blow quantity precise control function for a steel ladle. The ventilation brick comprises a conical steel shell and an air inlet pipe at the bottom of the conical steel shell; the inside of the conical steel shell is provided with refractory mud material, and the center of the refractory mud material is provided with an axial through hole; the cross section of the upper half of the through hole is the same as cross sections of a refractory ventilating central seat and a refractory ventilating flat plate assembly; the cross section of the lower half of the through hole is larger than the cross section of the refractory ventilating central seat, so that an outer annular airchamber is formed between the inside of the through hole and the refractory ventilating central seat; and the air inlet pipe communicates with the outer annular air chamber. As for the air blow refractory element, on the basis of the existing technology, the refractory ventilating central seat is designed as an axially sliding structure, and the air inlet area is adjusted by adjusting the area ofthe refractory ventilating central seat in the outer annular chamber, so that the air permeability is adjusted and when the air permeability of the ventilation brick changes, the air permeability canbe adjusted to the primary air permeability, so that the accuracy of the air blow quantity at the rated air pressure is ensured.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an air-permeable brick for a ladle with precise control of air blowing volume. Background technique [0002] In the iron and steel metallurgy industry, after the molten steel enters the ladle, the inert gas is blown into the molten steel to achieve uniform temperature and chemical composition of the molten steel, to promote the floating of inclusions or to control the shape of inclusions, which is commonly used in the modern metallurgical industry. technology. The current way to achieve this method is to install breathable bricks at the bottom of the ladle, which has the advantages of good mixing effect, simple operation, and low cost. Therefore, breathable bricks have become an indispensable functional breathable element in the modern metallurgical industry. [0003] However, with the large-scale development of ladles, the smelting conditions of breatha...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an air permeable brick for ladle with precise control of air blowing volume, aiming to solve the problem that the air permeation rate of the existing air permeable brick changes after being washed by molten steel, resulting in inaccurate air blowing volume

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