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Method for improving self-opening rate of drainage sand

A technology of drainage sand and self-opening rate, which is applied in the direction of casting molten material containers, metal processing equipment, casting equipment, etc., can solve problems such as potential safety hazards, increased oxygen content of molten steel, and slag entrainment of molten steel, so as to ensure product quality and production efficiency. The effect of stabilizing rhythm

Inactive Publication Date: 2020-03-24
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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Problems solved by technology

If the continuous casting is not self-opening, it is necessary to carry out the drainage operation of the boiler, and this will bring the following effects to the billet quality: (1) The oxygen content of the molten steel increases; (2) The molten steel injection impacts the liquid surface of the tundish, causing the molten steel to slag; (3) Increase the labor intensity of workers and bring safety hazards

Method used

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  • Method for improving self-opening rate of drainage sand

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Embodiment 1

[0012] Such as figure 1 As shown, the present invention improves on the basis of the existing drainage sand adding device, opens a hole on the drainage sand box body to connect the nitrogen purge pipe, and then adds a liftable cover plate on the drainage sand box body, Moreover, there is a sealing ring on the cover plate, which can make the drainage sand box body a closed space, and impurities and water vapor in the outside air are difficult to enter the box to contaminate the drainage sand, ensuring that the drainage sand is dry and pure. In addition, the drainage sand adding device controls the addition of drainage sand at the upper nozzle of the steel ladle through the valve, and the amount of sand added is controllable. At the same time, a tripod is added to the upper nozzle of the steel ladle for positioning, so that the injection point of the drainage sand is accurate, which can effectively ensure the cleanness of the drainage sand. The degree and addition amount are sta...

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Abstract

The invention discloses a method for improving the self-opening rate of drainage sand. A nitrogen purging part is provided on the basis of forming a drainage sand adding device into a closed space, soas to ensure that the drainage sand is dry and pure. A positioning support is disposed on a steel ladle nozzle to control the uniform addition of drainage sand. The method can solve problems such asdamping and agglomeration of the drainage sand, dust fall, unstable addition amount, and poor molding, achieves a stable self-opening rate more than 99%, and ensures a stable production rhythm and product quality.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for improving the self-opening rate of drainage sand. Background technique [0002] Continuous casting self-opening refers to the phenomenon that before the ladle is tapped, in order to avoid direct contact between the molten steel and the upper nozzle of the ladle and solidify, it is necessary to add drainage agent in the nozzle. When the sliding nozzle is opened, the molten steel can flow out automatically with the drainage agent. When the ladle nozzle is opened and the drainage agent cannot flow out automatically, the continuous casting operator can only use the oxygen lance to burn the ladle nozzle to make the drainage agent flow out. If the continuous casting is not self-opening, it is necessary to carry out the drainage operation of the boiler, and this will bring the following effects to the billet quality: (1) The oxygen content of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/44
CPCB22D41/44
Inventor 缪黄兵黄永林金王艳袁卫军
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD
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