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A secondary pouring process for continuous casting tundish

A continuous casting tundish and tundish technology, applied in the field of continuous casting in the metallurgical industry, can solve the problems affecting the production of iron and steel enterprises, reduce the service life of the tundish, etc., so as to reduce the consumption of continuous casting refractory materials and ease the supply of the tundish. Tension, ensure the antegrade effect of production

Inactive Publication Date: 2018-09-25
乌海市包钢万腾钢铁有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a new tundish is replaced at this time, the service life of the tundish will be reduced, and according to the new tundish baking rules, replacing a new tundish will take more than 10 hours for steelmaking to resume production, resulting in blast furnace wind reduction or even The wind has seriously affected the production of iron and steel enterprises, especially the production of ordinary carbon steel. This situation is more prominent

Method used

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Examples

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Comparison scheme
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Embodiment Construction

[0032] The present invention will be further described below by example.

[0033] A continuous casting tundish secondary pouring process, the continuous casting tundish secondary pouring refers to a tundish with a rated service life greater than 20 hours, within 12 hours after the tundish is poured once, due to an accident, Cause the tundish to stop pouring, and start pouring again within 3 hours. The first pouring of the tundish means that the tundish pours molten steel into the crystallizer for the first time for pouring. The scope of the accident treatment time is different. Continuous casting tundish two Different operations are used for each pouring;

[0034] When the accident processing time is 0

[0035] (1) Before the pouring of the tundish is stopped, the tundish should be slag-discharged so that the thickness of the slag layer is less than 10 mm, and the tundish covering agent is no longer added;

[0036] (2) When the...

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PUM

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Abstract

The invention relates to a secondary cast-on process for continuous-casting tundishes and belongs to the technical field of continuous casting of the metallurgical industry. According to the technical scheme, the process comprises the steps that (1), before casting of the tundishes is stopped, slagging treatment is conducted on the tundishes; (2), when the liquid steel level of the tundishes remains at 200 mm, the remaining one to two middle streams of water gaps are cast continuously; (3), when the tundish liquid steel level is at 10-20 mm, casting of the tundishes is stopped; (4), the tundishes are baked, the baking temperature ranges from 1,100 DEG C to 1,300 DEG C, and the baking time ranges from 45 minutes to 180 minutes; (5), after baking of the tundishes is completed, liquid steel in steel ladles is injected into the tundishes; and (6), the liquid steel level of the tundishes is greater than 300 mm, and secondary casting is conducted on the tundishes. The secondary cast-on process has the beneficial effects that the temperature loss of the tundishes is reduced, the service life of the tundishes is guaranteed, the consumption of continuous-casting refractory is lowered, and the smooth production of iron and steel enterprises is guaranteed.

Description

technical field [0001] The invention relates to a continuous casting tundish secondary pouring process, in particular to a billet continuous casting tundish secondary pouring process, belonging to the continuous casting technical field of the metallurgical industry. Background technique [0002] In the steelmaking production of the metallurgical industry, the tundish is the intermediate link of the steelmaking production process, and it is also the transition point from intermittent operation to continuous operation. Regardless of whether it is for the smooth progress of continuous casting operations or for ensuring that the quality of molten steel meets the requirements, the role of the tundish cannot be ignored. The function of the tundish is to stabilize the temperature of the molten steel, to make the molten steel inclusions float up, and to ensure the smooth running of the continuous casting when there is a short-term shortage of molten steel or when the ladle is replac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18
CPCB22D11/18
Inventor 朱劲峰杨立民孔祥玉葛志刚孟润泽
Owner 乌海市包钢万腾钢铁有限责任公司
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