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Tundish cold casting method

A tundish and drying technology, applied in the field of iron and steel smelting, can solve the problems of long turnaround time and large gas consumption of the tundish, and achieve the effects of saving the amount of preheated gas, improving the utilization rate and speeding up the turnover speed.

Active Publication Date: 2012-08-08
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process results in long tundish turnaround time and high gas consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] (1) The baking plan after the knotted tundish reaches the pouring platform:

[0021] After adopting the tundish cold start pouring process, considering the thermal stability of other refractory materials such as stopper rods and tundish nozzles, only short-term preheating is performed on the stopper rods and tundish nozzles to reduce the refractory materials during pouring. The internal and external temperature gradient prevents thermal cracking of refractory materials such as stopper rods and tundish nozzles, and prevents major production accidents.

[0022] (2) When the tundish is started for cold pouring, the temperature compensation scheme for molten steel refining:

[0023] After adopting the tundish cold pouring technology, a certain temperature compensation of the molten steel is carried out through the optimization of the converter or the refining process outside the furnace.

[0024] (3) When the tundish is cold poured, the large tank pouring operation plan: ...

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PUM

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Abstract

The invention relates to a tundish cold casting method belonging to the technical field of steelmaking. The method is achieved as follows: only baking a water gap and a stopper rod passage for 20-40 min; and reaching the process requirement through adjusting the liquid steel temperature after out-of-furnace refining treatment is finished, the casting slag use amount during casting a crystallizer and a casting speed control parameter after the crystallizer is cast. The method simplifies the baking process of a tundish, shortens the turnaround time of the tundish, improves the utilization ratioof the tundish, prolongs the service life of the tundish, lowers the consumption of baking gas of the tundish and reduces the production cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a new technology of cold-state pouring of molten steel in a tundish of a continuous casting machine. Background technique [0002] The knotting methods of the tundish working lining used in continuous casting are usually divided into two methods: dry method and wet method. The knotting method of dry material is showing an upward trend. Under traditional conditions, in order to ensure smooth pouring of molten steel, the knotted tundish must be preheated with a preheating device before pouring molten steel. The preheating time is generally 90-120 minutes, and the internal temperature of the tundish is required to be baked to Above 1100℃. This process results in long tundish turnaround time and high gas consumption. Contents of the invention [0003] The object of the present invention is to provide a method for cold pouring of the tundish, which sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/10B22D11/18B22D11/111
Inventor 方恩俊王军王金辉李超殷浩刘清海张宏亮张立夫
Owner ANGANG STEEL CO LTD