CN-121972510-A - Stainless steel integrated rolling annealing pickling production line

CN121972510ACN 121972510 ACN121972510 ACN 121972510ACN-121972510-A

Abstract

The invention relates to an integrated rolling annealing and pickling production line for stainless steel, which comprises a hot-rolled stainless steel annealing and pickling process section, a cold continuous rolling process section and a cold-rolled stainless steel annealing and pickling process section, wherein the hot-rolled stainless steel annealing and pickling process section, the cold continuous rolling process section and the cold-rolled stainless steel annealing and pickling process section are sequentially connected, the hot-rolled stainless steel annealing and pickling process section sequentially comprises an uncoiler, a laser welder, a first loop, a hot-rolled annealing section, a hot-rolled pickling section and a second loop, and the cold-rolled stainless steel annealing and pickling process section sequentially comprises a third loop, a cold-rolled annealing section, a cold-rolled pickling section, a fourth loop, a laser cutter and a coiling machine. Compared with the prior art, the invention combines the production equipment and designs a continuous production line, thus being beneficial to production with higher efficiency and better continuity. Meanwhile, the integrated design realizes multi-station collaborative operation, saves comprehensive cost, reduces total equipment and reduces investment of unit productivity equipment.

Inventors

LI NING
WANG HUAN
WU SHANSHAN
WANG JIZHOU
PENG WEI
BAI JIANGUANG
LUO JINGQING
LIU ZIHANG
HOU JUNQING
ZHANG BIHUI
LI LINGYU
ZHAO FUQIANG
XU BO
ZHOU YINGYING

Assignees

中冶沈勘秦皇岛工程设计研究总院有限公司

Dates

Publication Date: 20260505
Application Date: 20260105

Claims (6)

1. The integrated rolling, annealing and pickling production line for the stainless steel is characterized by comprising a hot rolling stainless steel annealing and pickling process section, a cold continuous rolling process section and a cold rolling stainless steel annealing and pickling process section, wherein the hot rolling stainless steel annealing and pickling process section, the cold continuous rolling process section and the cold rolling stainless steel annealing and pickling process section are sequentially connected; The annealing and pickling process section of the hot-rolled stainless steel sequentially comprises an uncoiler, a laser welding machine, a hot-rolled annealing section and a hot-rolled pickling section; the cold-rolled stainless steel annealing and pickling process section sequentially comprises a cold-rolled annealing section, a cold-rolled pickling section, a laser cutting machine and a winding machine.
2. The integrated rolling, annealing and pickling production line for stainless steel according to claim 1, wherein a first loop is arranged between a laser welding machine and a hot rolling annealing section, a second loop is arranged between the hot rolling pickling section and a cold continuous rolling process section, a third loop is arranged between the cold continuous rolling process section and the cold rolling annealing section, and a fourth loop is arranged between the cold rolling pickling section and a laser cutting machine.
3. The stainless steel integrated rolling, annealing and pickling production line according to claim 2, wherein the first loop, the second loop, the third loop and the fourth loop are used for monitoring the belt storage quantity in real time through sensors, and controlling the tension fluctuation of the strip steel to be not more than +/-5%.
4. A stainless steel integrated rolling annealing pickling line according to claim 3, characterised in that: When the laser welder is in a stop operation state, the speed of the first loop inlet is zero, and the first loop executes a loop releasing operation; When the welding operation of the laser welder is finished, the uncoiler runs in a full line at a set speed, the inlet speed of the first loop is higher than the outlet speed, and the first loop performs the loop filling operation; And when the strip steel reserve in the first loop reaches a preset threshold value, the uncoiler is restored to the rated uncoiling speed, and the inlet speed of the first loop is equal to the outlet speed.
5. The stainless steel integrated rolling, annealing and pickling production line according to claim 4, wherein: When the stainless steel cold rolling unit in the cold continuous rolling process section is stopped, the outlet speed of the second loop is zero, the second loop performs the loop filling operation, the inlet speed of the third loop is zero, and the third loop performs the loop releasing operation; When the stainless steel cold rolling unit in the cold continuous rolling process section resumes working, the outlet speed of the second loop is greater than the inlet speed, the second loop performs the loop releasing operation, the inlet speed of the third loop is greater than the outlet speed, and the third loop performs the loop filling operation; when the second loop internal storage amount drops to the 30% threshold and the third loop internal storage amount rises to the 70% threshold, the outlet speed of the second loop and the third loop is equal to the inlet speed.
6. The stainless steel integrated rolling, annealing and pickling production line according to claim 5, is characterized in that: When the laser cutting machine executes the steel strip cutting operation, the outlet speed of the fourth loop is zero, and the fourth loop executes the loop filling action; after the laser cutting machine completes the cutting operation, the outlet speed of the fourth loop is greater than the inlet speed, and the fourth loop executes the loop releasing action; when the fourth loop internal memory falls to the 30% threshold, the fourth loop outlet speed equals the inlet speed.

Description

Stainless steel integrated rolling annealing pickling production line Technical Field The invention belongs to the field of steel rolling, relates to an innovative integrated production system in the field of steel rolling, and particularly relates to an integrated rolling, annealing and pickling production line for stainless steel. Background Under the current technical background, the water accumulation level of steel product production equipment is continuously improved, so that the increasing productivity and quality technical requirements are met. In order to produce a strip with a smaller thickness, better properties and better surface quality than a hot-rolled strip, the corresponding production plant has a continuous cold-rolling mill train and an annealing-pickling line. Compared with an independent cold rolling production line and a hot annealing pickling line and a cold annealing pickling line corresponding to the hot rolled strip steel and the cold rolled strip steel respectively, the production equipment is generally combined and designed into a continuous production line, so that the production is facilitated with higher efficiency and better continuity. The main processing production line of the current cold rolling annealing pickling process equipment comprises the following steps: The thermal annealing and pickling production line HAPL is used for the subsequent treatment of the hot rolled stainless steel coil, eliminates the internal stress by annealing and combines pickling to remove the oxide layer. The process remarkably improves the strength and toughness of the material, synchronously reduces brittleness, enables the surface to reach a smooth and clean gray roll state, and lays a high-quality substrate foundation for subsequent processing. The TCM of the cold continuous rolling unit is suitable for steel coils which are/is not processed by HAPL, and the plastic deformation is realized by rolling. The process accurately regulates the thickness and the shape of the plate, optimizes the metal crystal structure, and remarkably improves the mechanical strength and the dimensional accuracy of the steel. The cold annealing and pickling production line CAPL carries out secondary heat treatment and surface purification on the cold rolled steel coil, further eliminates the work hardening phenomenon, recovers the ductility of the material, obtains a high-finish surface at the same time, and meets the substrate quality requirement of high-end deep-processing products. The three processing production lines HAPL provide basic performance guarantee, cold rolling realizes the reduction of the gauge of the guaranteed performance, CAPL completes final processing, and supports the conversion of the hot rolled steel coil from a semi-finished product to a high added value product together. At present, the corresponding production line built by enterprises in the industry has the following forms that a thermal annealing pickling line HAPL is used for producing No.1 gray rolls, a cold tandem rolling mill TCM/single-stand cold rolling mill SCR is used for producing chilled rolls, HAPL +TCM thermal annealing pickling line and cold rolling are combined for producing chilled rolls, and TCM+ CAPL cold rolling annealing pickling line is used for producing. The continuous production lines in the above forms are all the hot annealing pickling line HAPL, the cold continuous rolling unit TCM and the cold annealing pickling line CAPL, and the two types of the continuous production lines are combined by taking the cold continuous rolling unit as a core. If the hot rolled finished product coil is used as a raw material for producing a finished product with high surface quality, at least two production lines are combined, and capacity matching, logistics connection, construction of respective public facilities and auxiliary facilities and the like are considered. The problems of intermittent production, repeated equipment, large capital construction area, large occupied area and the like exist. Therefore, with respect to the technical level and construction form of the current production line, the device technical innovation can be performed in several aspects mentioned above, and the improvement capability is reduced. In view of this, the present invention has been made. Disclosure of Invention The invention provides an integrated rolling, annealing and pickling production line for stainless steel, which can realize full continuous production by taking a hot rolled stainless steel coil as a raw material and taking a 2B and 2D high-quality cold rolling, annealing and pickling finished coil as a final product compared with the existing production line by using smaller occupied area, fewer on-line equipment, lower energy consumption level for ton steel and more stable full-line production rhythm. In order to achieve the above purpose, the invention adopts the following technical scheme: the integrated rolling, annealing an