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The Method of Using Electrode Paste to Protect Ladle Mouth of Hot Metal

A technology of electrode paste and wrapping nozzle, which is applied in metal processing equipment, manufacturing tools, casting melt containers, etc., can solve the problems of component segregation, flow iron accident, scouring and take away, etc., so as to reduce production costs and reduce the number of nozzles. Iron flow incident, the effect of reducing labor intensity

Active Publication Date: 2018-11-23
嘉峪关宏电铁合金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Quartz sand is granular, light in specific gravity, and does not stick to each other. During the tapping process, it is easily washed away by slag and iron, and can only protect the nozzle for a short time, making the nozzle easy to burn. Causing iron accidents;
[0004] 2. During the maintenance of the ladle before the molten iron ladle goes online again, the slag bonded to the ladle is not easy to clean up. It takes two people to cooperate with tools such as sledgehammer and steel brazing to clean it for about 1 hour, and this operation will lead to on-line failure. There is a risk of flowing iron at the mouth of the ladle;
[0005] 3. The quartz sand taken away by the slag iron will enter the cast product and cover a layer of quartz sand particles on its surface, which will not only affect the appearance of the cast product, but also cause component segregation during the product test process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for protecting the mouth of molten iron ladle with electrode paste specifically includes the following steps:

[0019] (1) Spread a layer of 25mm gun mud on the molten iron ladle mouth, and then spread a layer of electrode paste powder with a particle size of 5-10mm before going online;

[0020] (2) Control slag and iron to flow through the nozzle at a flow rate of 0.25m / s, and the tar in the electrode paste powder will condense after burning, and the thickness of the electrode paste layer after condensing is 20mm;

[0021] (3) After the iron is tapped, use a steel drill to lift off the sticky debris on the nozzle; when the nozzle needs to be maintained before going online again, directly spread a layer of electrode paste powder with a thickness of 5-10mm on the nozzle, and repeat the steps ( 2) That's it.

[0022] After using this method to protect the molten iron ladle nozzle, the maintenance frequency of the molten iron ladle nozzle is reduced from 1 time...

Embodiment 2

[0024] The method for protecting the mouth of molten iron ladle with electrode paste specifically includes the following steps:

[0025] (1) Spread a layer of 30mm gun mud on the molten iron ladle nozzle, and then spread a layer of electrode paste powder with a particle size of 1-5mm before going online;

[0026] (2) Control slag and iron to flow through the nozzle at a flow rate of 0.20m / s, and the tar in the electrode paste powder will condense after burning out, and the thickness of the electrode paste layer after condensing is 23mm;

[0027] (3) After the iron is tapped, use a steel drill to lift off the sticky debris on the nozzle; when the nozzle needs to be maintained before going online again, directly spread a layer of electrode paste powder with a thickness of 5-10mm on the nozzle, and repeat the steps ( 2) That's it.

[0028] After using this method to protect the molten iron ladle nozzle, the maintenance frequency of the molten iron ladle nozzle is reduced from 1 ...

Embodiment 3

[0030] The method for protecting the mouth of molten iron ladle with electrode paste specifically includes the following steps:

[0031] (1) Spread a layer of 35mm gun mud on the molten iron ladle nozzle, and then spread a layer of electrode paste powder with a particle size of 1-5mm before going online;

[0032] (2) Control slag and iron to flow through the nozzle at a flow rate of 0.15m / s, and the tar in the electrode paste powder will condense after burning out, and the thickness of the electrode paste layer after condensing is 25mm;

[0033] (3) After the iron is tapped, use a steel drill to lift off the sticky debris on the nozzle; when the nozzle needs to be maintained before going online again, directly spread a layer of electrode paste powder with a thickness of 5-10mm on the nozzle, and repeat the steps ( 2) That's it.

[0034] After using this method to protect the molten iron ladle nozzle, the maintenance frequency of the molten iron ladle nozzle is reduced from 1 ...

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Abstract

The invention discloses a method for protecting a ladle spout through electrode paste and belongs to the technical field of metallurgical equipment maintenance. The method includes the steps that based on the high-temperature resistance of the electrode paste and the layering non-stick principle of iron slag and the electrode paste, a layer of electrode paste powder is laid on the ladle spout, high-temperature iron slag is sintered into a hard shell, and thus a permanent protective layer is formed on the ladle spout. Through the method, the condition that the ladle spout is burnt out, and the iron flowing accident occurs can be prevented. After tapping, one person can stick off sticky things easily, the labor intensity of an operator is relieved, and iron flowing accidents of the ladle spout of one more on-line operation are reduced. The electrode paste is formed through self-roasting with metallurgical and chemical waste, on-line sintering can be conducted directly, thus the production cost is reduced, and certain application and popularization value is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment maintenance, in particular to a method for protecting molten iron ladle nozzles by using electrode paste. Background technique [0002] Ladle is the equipment for pouring in foundry. At present, when ladle is in use, it is usually necessary to lay a layer of quartz sand on the spout to protect the spout, so as to prevent the occurrence of iron flow accidents during the pouring process. There are the following defects: [0003] 1. Quartz sand is granular, light in specific gravity, and does not stick to each other. During the tapping process, it is easily washed away by slag and iron, and can only protect the nozzle for a short time, making the nozzle easy to burn. Causing iron accidents; [0004] 2. During the maintenance of the ladle before the molten iron ladle goes online again, the slag bonded to the ladle is not easy to clean up. It takes two people to cooperate with tools s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/52
CPCB22D41/52
Inventor 冯选杰王国强马天荣
Owner 嘉峪关宏电铁合金有限责任公司