Continuous heating furnace arrangement mode for thick plate production and steel pumping method through same

Abstract

The invention discloses a continuous heating furnace arrangement mode for thick plate production and a steel pumping method through the same. According to the continuous heating furnace arrangement mode, three walking beam continuous heating furnaces are arranged side by side, and each walking beam continuous heating furnace sequentially comprises a heat recovery section, a preheating section, a first heating section, a second heating section and a soaking section from the furnace tail to the furnace end in the furnace length direction; and a double-discharging mode is adopted for discharging,that is, each heating furnace is provided with two rows of discharging, the bottom of each heating furnace is provided with two sets of walking beam mechanisms, and the two sets of walking beam mechanisms form walking beam synchronous action by arranging a connecting frame. According to the continuous heating furnace arrangement mode, starting from furnace body walking beam synchronism guaranteeand overall optimization of the steel pumping and charging process, the efficiency of the fixed-length blank and long blank combined production process is ensured, finally, the requirement of a user for longitudinal rolled materials is met at the highest speed in batches, and meanwhile the operation cost is reduced; and moreover, efficient supply of long blanks required by longitudinal rolled materials can be achieved alternately in the operation process of a traditional thick plate rolling mode, the rolling efficiency is improved, and the cost is saved.

Description

technical field

[0001] The invention relates to heating furnace technology, in particular to an arrangement mode of a continuous heating furnace for thick plate production and a steel drawing method. Background technique

[0002] Thick plate products are widely used in shipbuilding, pipelines, bridges, construction, construction machinery and other fields. In recent years, the domestic market has maintained strong demand for thick plate products of different varieties and specifications. In the steel rolling area of ​​the heavy plate factory, on the basis of comprehensive consideration of the inherent continuous casting slab section specifications and the rolled large plate size based on the contract plate design, the most typical rolling method selected is "forming-broadening-extending" rolling. The rolling method, that is, the L-C-L rolling method (defined as C is rolling along the width of the slab, and L is rolling along the length of the slab), so there is a significant...

Examples

Embodiment 1 3

[0055] Example 1 Steel drawing mode combined with cut-to-length billet and long billet in three heating furnaces

[0056] In this embodiment, there are the following six typical combinations. The number of pieces loaded into continuous small batches of long blanks is 12, 15, and 18 pieces per furnace, and the number of pieces loaded into continuous small batches of long billets matched with them The number is 12 or 18 pieces per furnace.

[0057] see figure 2 , 12 long billets 1 and 12 cut-to-length billets 2 are arranged in succession.

[0058] It has 3 walking beam continuous heating furnaces that can meet the annual production capacity of 3 million tons of thick plate rolling. The rated hourly output of each heating furnace is 330t / h, and the maximum hourly output is 360t / h. In this rolling plan, the specification range of cut-to-length billet 2 is about 227mm×1900mm×3500mm, and the specification range of long billet 1 is about 227mm×1900mm×8000mm, and the number of slab...

Embodiment 2

[0079] see Figure 8 , Two heating furnaces for fixed-length billets and one heating furnace for long billet drawing.

[0080] It has 3 walking beam continuous heating furnaces that can meet the annual production capacity of 3 million tons of thick plate rolling. The rated hourly output of each heating furnace is 330t / h, and the maximum hourly output is 360t / h. In this rolling plan, the specification range of the cut billet is about 227mm×1900mm×3500mm, the hot charging temperature is about 500°C and the target release temperature is 1080°C, the specification range of the long billet is about 227mm×1900mm×8000mm, the cold billet is loaded and the target release temperature is 1150°C. At this time, the number of fixed-length billets is far more than that of long billets. It is not suitable to arrange long billets and fixed-size billets into the furnace at intervals of small batches. One heating furnace is used as a buffer adjustment, and the other two heating furnaces are used...

Embodiment 3

[0083] see Figure 9 , Two heating furnaces for fixed-length billets and one heating furnace for long billet drawing.

[0084] It has 3 walking beam continuous heating furnaces that can meet the annual production capacity of 3 million tons of thick plate rolling. The rated hourly output of each heating furnace is 330t / h, and the maximum hourly output is 360t / h. In this rolling plan, the specification range of cut-to-length billets is about 227mm×1900mm×3500mm, which is cold loaded into the furnace and the target furnace temperature is 1150°C, and the long billet specification range is about 227mm×1900mm×8000mm, and the hot charging temperature is about 500°C and the target furnace temperature is 1080°C, at this time, the number of long billets is far more than that of cut-to-length billets, and it is not suitable to arrange long billets and cut-to-size billets into the furnace at intervals of small batches, so the cut-to-length billets are arranged in a centralized manner near...

technical field

[0001] The invention relates to heating furnace technology, in particular to an arrangement mode of a continuous heating furnace for thick plate production and a steel drawing method. Background technique

[0002] Thick plate products are widely used in shipbuilding, pipelines, bridges, construction, construction machinery and other fields. In recent years, the domestic market has maintained strong demand for thick plate products of different varieties and specifications. In the steel rolling area of ​​the heavy plate factory, on the basis of comprehensive consideration of the inherent continuous casting slab section specifications and the rolled large plate size based on the contract plate design, the most typical rolling method selected is "forming-broadening-extending" rolling. The rolling method, that is, the L-C-L rolling method (defined as C is rolling along the width of the slab, and L is rolling along the length of the slab), so there is a significant...

Examples

Embodiment 1 3

[0055] Example 1 Steel drawing mode combined with cut-to-length billet and long billet in three heating furnaces

[0056] In this embodiment, there are the following six typical combinations. The number of pieces loaded into continuous small batches of long blanks is 12, 15, and 18 pieces per furnace, and the number of pieces loaded into continuous small batches of long billets matched with them The number is 12 or 18 pieces per furnace.

[0057] see figure 2 , 12 long billets 1 and 12 cut-to-length billets 2 are arranged in succession.

[0058] It has 3 walking beam continuous heating furnaces that can meet the annual production capacity of 3 million tons of thick plate rolling. The rated hourly output of each heating furnace is 330t / h, and the maximum hourly output is 360t / h. In this rolling plan, the specification range of cut-to-length billet 2 is about 227mm×1900mm×3500mm, and the specification range of long billet 1 is about 227mm×1900mm×8000mm, and the number of slab...

Embodiment 2

[0079] see Figure 8 , Two heating furnaces for fixed-length billets and one heating furnace for long billet drawing.

[0080] It has 3 walking beam continuous heating furnaces that can meet the annual production capacity of 3 million tons of thick plate rolling. The rated hourly output of each heating furnace is 330t / h, and the maximum hourly output is 360t / h. In this rolling plan, the specification range of the cut billet is about 227mm×1900mm×3500mm, the hot charging temperature is about 500°C and the target release temperature is 1080°C, the specification range of the long billet is about 227mm×1900mm×8000mm, the cold billet is loaded and the target release temperature is 1150°C. At this time, the number of fixed-length billets is far more than that of long billets. It is not suitable to arrange long billets and fixed-size billets into the furnace at intervals of small batches. One heating furnace is used as a buffer adjustment, and the other two heating furnaces are used...

Embodiment 3

[0083] see Figure 9 , Two heating furnaces for fixed-length billets and one heating furnace for long billet drawing.

[0084] It has 3 walking beam continuous heating furnaces that can meet the annual production capacity of 3 million tons of thick plate rolling. The rated hourly output of each heating furnace is 330t / h, and the maximum hourly output is 360t / h. In this rolling plan, the specification range of cut-to-length billets is about 227mm×1900mm×3500mm, which is cold loaded into the furnace and the target furnace temperature is 1150°C, and the long billet specification range is about 227mm×1900mm×8000mm, and the hot charging temperature is about 500°C and the target furnace temperature is 1080°C, at this time, the number of long billets is far more than that of cut-to-length billets, and it is not suitable to arrange long billets and cut-to-size billets into the furnace at intervals of small batches, so the cut-to-length billets are arranged in a centralized manner near...

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