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Method for preventing decarbonization through blank charging sequence control

A sequence control and anti-decarburization technology, applied in the field of metallurgy, can solve the problems of heating furnaces too late to adjust temperature, product heating, etc.

Active Publication Date: 2017-03-22
NANJING IRON & STEEL CO LTD
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Problems solved by technology

[0005] Aiming at different heating temperatures of different steel types, the purpose of the present invention is to provide a method for controlling the decarburization prevention of billets into the furnace, through which the decarburization prevention control is carried out by the billets into the furnace to reduce the temperature difference. The heating furnace is too late to adjust the temperature, resulting in product heating defects

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Embodiment Construction

[0029] A method for preventing decarburization by controlling the sequence of blanks entering the furnace, classifying the heating temperatures of all steel types according to the composition, temperature, and sensitivity to temperature of the steel types, reducing the large difference in temperature, the sequence of entering the furnace is too close, and the heating furnace is too late Adjust the temperature to cause product heating defects; the specific requirements are as follows:

[0030] See Table 1 for the classification table of steel types. Through the above classification research, the sequence control and control principles of different steel types when entering the furnace are formulated. The same type of steel is prioritized together; the order of furnace loading is: Ⅱ → Ⅲ → Ⅳ → Ⅴ or Ⅴ → Ⅳ → Ⅲ → Ⅱ; type Ⅰ steel is used as the transition steel between any two types of Ⅱ-Ⅴ, and the quantity is more than 20 ; If the quantity of Class I steel is not enough, carry out e...

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Abstract

The invention discloses a method for preventing decarbonization through blank charging sequence control. The heating temperatures of all types of steel are classified according to the ingredients, the temperatures and sensitivity to temperatures of the steel, and the product heating detects due to the fact that when temperature difference is large, the charging sequence is too close, and it is too late for a heating furnace to adjust the temperature are overcome; the steel is divided into five types to solve the heating quality problem caused by mixed arrangement of the steel; and charging sequence control of different types of steel is determined according classification. According to the method for preventing decarbonization through blank charging sequence control, the blank charging sequence is controlled according to a classification principle, and the product heating detects due to the fact that when temperature difference is large, the charging sequence is too close, and it is too late for the heating furnace to adjust the temperature are overcome.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to a method for controlling the charging sequence of billets in a continuous steel rolling heating furnace, specifically how to prevent decarburization by feeding into the furnace according to the different heating temperatures of different steel types. Background technique [0002] In the steel rolling mill, according to the customer's delivery requirements, the blanks corresponding to the order are arranged to enter the heating furnace for heating, and reach the specified heating temperature to be rolled out of the furnace. [0003] Varieties of steel have different decarburization requirements for products. However, for continuous heating furnaces, it is difficult to control the decarburization of different steel types, especially when the temperature difference between adjacent steel types is large. By rationally formulating the classification principle, the order of billets entering the...

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Application Information

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IPC IPC(8): B21B37/74
CPCB21B37/74
Inventor 孙军肖训军彭学艺成建兵薛彦珍
Owner NANJING IRON & STEEL CO LTD
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