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Bell-type furnace for high-temperature heat treatment of metal band roll and application of bell-type furnace

A high-temperature heat treatment and metal strip technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of watermark formation, high heat treatment temperature, and exceeding the working temperature range of circulating fans, etc., to reduce energy consumption, accelerate heating and cooling The effect of the process

Pending Publication Date: 2018-09-07
江阴森豪金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter scheme is equipped with a circulating fan at the bottom of the furnace, and the airflow circulation in the heat treatment chamber is strengthened through the tuyeres, but the arrangement and shape of the tuyeres determine the structure of the latter scheme to accelerate the rising rate of the airflow, and the direction of the rising airflow cannot be changed.
In the latter scheme, the air circulation in the heat treatment chamber is due to the former scheme, but the heat treatment temperature of silicon steel is as high as about 1200°C, which exceeds the working temperature range of the circulating fan
In addition, the steel coil is placed directly on the furnace plate. Since the self-weight steel coil and the furnace plate are in a sealed state, the water vapor in the steel coil cannot be discharged in time, and watermarks are easily formed on the bottom edge of the steel coil.

Method used

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  • Bell-type furnace for high-temperature heat treatment of metal band roll and application of bell-type furnace
  • Bell-type furnace for high-temperature heat treatment of metal band roll and application of bell-type furnace
  • Bell-type furnace for high-temperature heat treatment of metal band roll and application of bell-type furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1-4As shown, the bell-type furnace for high-temperature heat treatment of metal strip coils in Example 1 includes a furnace base 1, a furnace plate 2 and a furnace cover 8. Several raised parts a are arranged on the top of the furnace base 1 to form a raised layer 3, and the furnace plate 2 It is arranged on the top of the protruding layer 3, and there is an air guide channel b between several protruding parts a, and a vent hole c is arranged in the center of the furnace plate 2, and the air guide channel b communicates with the vent hole c; the furnace cover 8 is sealed Set on the furnace platform 2 on the outer edge of the furnace plate 2;

[0040] The hearth 1 is embedded with a vertical protective gas pipe 4, which communicates with the gas source 5, and the top of the protective gas pipe 4 is connected with at least two branch pipes 6, and the branch pipes 6 are inclined upward and diverge in a spiral shape with the same rotation direction. The bra...

Embodiment 2

[0046] Such as Figure 5-6 As shown, the difference between embodiment 2 and embodiment 1 is that the number of branch pipes is 3;

[0047] The branch pipe 6 includes a transition pipe section 61 connected end to end and a spiral pipe section 62, the spiral pipe section 62 is a cylindrical helical pipe, one end of the transition pipe section 61 is connected to the protective air pipe 4, and the central axis of the protective air pipe 4 and the central axis of the transition pipe section 61 are clamped The obtuse angle is 110°. The cylindrical helical tube can also be a conical helical tube. In Embodiment 2, the obtuse angle formed by the central axis of the protective gas pipe 4 and the central axis of the transition pipe section 61 can be enlarged to 150°. The transition pipe section 61 is a straight pipe.

[0048] The helix angle of the spiral pipe section 62 is 30-60°.

[0049] In Embodiments 1 and 2, the seal between the protective gas pipe 4 and the hearth 1 is filled...

Embodiment 3

[0053] Such as Figure 7-10 As shown, the difference between embodiment 3 and embodiment 2 is that the top surface of the furnace plate 2 is divergently provided with several ventilation grooves 7, and the two ends of the ventilation grooves 7 protrude from the ring contact area of ​​the metal strip coil d of the furnace plate 2 Edge and Outer settings.

[0054] Ventilation slot 7 is arc-shaped, and the direction of rotation of the inner arc on the top surface of furnace plate 2 is the same as that of the spiral pipe section.

[0055] The furnace base 1 includes a base plate 11 and a furnace base body 12 fixedly arranged on the base board. The shielding gas pipe 4 is penetrated through the base board 11 and the furnace base body 12. The shielding gas pipe 4 is welded and sealed to the bottom surface of the base board 11. The bottom ends of the shielding gas pipe 4 are sequentially Connect with the air source 5 through flanges, conduit flanges, and conduits.

[0056] The notc...

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Abstract

The invention discloses a bell-type furnace for high-temperature heat treatment of a metal band roll. The bell-type furnace for high-temperature heat treatment of the metal band roll comprises a furnace platform, a furnace plate and a furnace cover and is characterized in that the top end of the center of the furnace platform is provided with a protrusion layer, and the protrusion layer comprisesa plurality of protrusion pieces; the furnace plate is arranged at the top end of the protrusion layer, and air guide channels from the periphery of the protrusion layer to the center are formed between the multiple protrusion pieces in a clamped manner; the center of the furnace plate is provided with an air hole, and the air guide channels communicate with the air hole; and a vertical protectiveair pipe is embedded into the furnace platform and communicates with an air source, the top end of the protective air pipe is provided with at least two branch pipes in a communication manner, and the branch pipes are obliquely and upwards diverged and are in a spiral shape with the same turning direction. By means of the improved scheme, the contact probability of protective gas and an inner layer band body of a metal band roll can be increased, the ventilation state of the surface of the inner layer band body is improved, and the heat treatment yield is increased. Compared with steady air flow in the prior art, the energy consumption can be reduced. The invention further discloses an application of the bell-type furnace for high-temperature heat treatment of the metal band roll in the high-temperature heat treatment of the metal band roll. The metal band roll comprises a silicon steel roll.

Description

technical field [0001] The invention relates to the field of steel coil heat treatment equipment, in particular to a bell furnace for high-temperature heat treatment of metal strip coils and its application. Background technique [0002] High-temperature annealing is a key process that determines the surface quality of oriented silicon steel. The high-temperature annealing process of oriented silicon steel is mainly completed in a trolley furnace or a bell furnace. [0003] Bell-type furnaces in the prior art are mainly composed of outer cover, inner cover and hearth. According to different process requirements, some bell-type furnaces have no inner cover, or a cooling cover is added on the basis of the three parts. The hearth is mainly composed of steel structure and masonry, which mainly plays the role of bearing and heat preservation; the inner cover is buckled above the hearth, and its function is to separate the flue gas flow space from the controllable atmosphere flow ...

Claims

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Application Information

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IPC IPC(8): C21D9/673C21D1/26C21D1/767
CPCC21D1/26C21D1/767C21D9/673
Inventor 刘源
Owner 江阴森豪金属科技有限公司
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