Movable type heating method before ingot hot rolling
A heating method and mobile technology, applied in the direction of metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of hot rolling peeling and cracking, long heating time, uneven heating of ingots, etc., to achieve uniform temperature, Reduce the effect of hot-rolled peeling and cracking, and reduce uneven heating
Active Publication Date: 2018-12-11
山西春雷铜材有限责任公司
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Problems solved by technology
[0003] The present invention aims to solve the technical problem that the cast ingot is statically heated in the heating furnace, and the heating time of the cast ingot in the heating furnace is too long, and the local heating of the ingot is uneven, resulting in defects such as peeling and cracking in hot rolling. A mobile heating method before ingot hot rolling
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[0015] A mobile heating method before ingot hot rolling, the height of the burner 3 in the heating furnace, that is, the distance between the front end of the burner 3 and the furnace roof is adjusted from 900mm (h3) to 840mm (h4), and the height is raised by 60mm; Gas and air are mixed and burned in the bell-shaped combustion chamber to achieve a flat flame effect. The height of the flame from the ingot is from the direct blowing material surface to more than 500mm from the ingot, and the diameter of the fire plate is enlarged from 1000mm to 1500mm (such as figure 1 shown).
[0016] The port of the combustion chamber is in the shape of a horn, and the burner protrudes from the middle of the horn; the gas in the burner is mixed with the compressed air coming out of the horn; this application has been redesigned, and the height of the burner has been increased, compared with that before the improvement ( figure 1 On the left side), the burner is shrunk to the inside of the bell...
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The invention relates to a heating technology before ingot hot rolling, in particular to a movable type heating method before the ingot hot rolling. The movable type heating method solves the technical problem that the defects such as peeling and edge cracking in hot rolling due to long heating time in a heating furnace and uneven local heating of an ingot caused by the fact that the ingot is heated statically in the heating furnace at present. The first improvement of the movable type heating method is to redesign and calculate the height of a burner port of the heating furnace in order to ensure the uniformity and consistency of flames in the heating furnace. Compared with an existing burner port, the height of the burner port and the distance change between the flames and the ingot dueto the improvement of the height of the burner port enable the flames of the burner port to form a flat flame effect in the heating furnace, the influence of local over-burning is reduced, and the local uneven heating of the ingot is effectively avoided. The second improvement of the movable type heating method is to ensure the product quality by controlling important parameters such as furnace temperature, ingot spacing, stepping time interval and step spacing, heating temperature and discharging time.
Description
technical field [0001] The invention relates to a heating technology before hot rolling of cast ingots, in particular to a mobile heating method before hot rolling of cast ingots. Background technique [0002] When all the ingots are in the heating zone, the ingots in the heating furnace are always in a static heating state. When the heating temperature reaches the temperature required by the process, hot rolling can begin. Ingots, while the temperature of the subsequent ingots has reached the rolling requirements, but they are still in a heated state, causing the ingots to be over-burned; and the over-burned ingots are prone to defects such as peeling and cracking during hot rolling. Contents of the invention [0003] The present invention aims to solve the technical problem that the cast ingot is statically heated in the heating furnace, and the heating time of the cast ingot in the heating furnace is too long, and the local heating of the ingot is uneven, resulting in d...
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IPC IPC(8): B21B45/00
CPCB21B45/00
Inventor 寇金祥张璨陈清香刘俊杰郑玉龙史可仁王鹏飞姚长青侯庭斌冯茜李晓博
Owner 山西春雷铜材有限责任公司