A kind of pickling and rolling method of cold rolling parking spots

A technology of parking spots and pickling, which is applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problem of low yield of ordinary carbon steel and achieve the effect of improving the yield

Active Publication Date: 2016-02-24
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the closure of the machine and the waste of rolling, the yield of ordinary carbon steel is low, generally fluctuating between 85% and 89%.

Method used

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  • A kind of pickling and rolling method of cold rolling parking spots
  • A kind of pickling and rolling method of cold rolling parking spots
  • A kind of pickling and rolling method of cold rolling parking spots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Taking the cold rolling 1450 acid tandem rolling unit of Shougang Qiangang as an example, it is necessary to pickle and roll the 900-meter-long idle coil. Before the shutdown of the production line, the main pickling operator first sets the minimum loop volume of the outlet loop between the pickling section and the trimming section to 5%, and sets the minimum loop volume of the outlet loop between the trimming section and the rolling mill section to 5%. Set amount is also set to 5%. The pickling section and trimming section run at low speed, and when the actual loop volume reaches 5%, the speeds of the two sections are synchronized with the rolling mill. After the production line shut down, the master operator of the rolling mill stopped the strip head at the entrance of the rolling mill, and controlled the loop volume of the two exit loops at 5%, and the two loopers retained 15 meters and 17 meters of strip steel respectively. If the pickling section is moved forward,...

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Abstract

The invention relates to the technical field of steel rolling, and discloses an acid cleaning rolling method for cold rolling parking spots, which comprises the following steps: performing the shallow slot acid cleaning to strip steel, to be specific, moving the strip steel at the acid cleaning section when the temperature in an acid cleaning groove reaches the corrosion temperature of the strip steel and starting a vehicle normally when the temperature of the acid cleaning groove reaches the target temperature required by the strip steel acid cleaning; rolling the acid cleaned strip steel. According to the invention, serious corrosion of a certain section of the strip steel is avoided, the yield of cold rolling plain carbon steel is improved, the yield of the acid rolling is increased from 85% to 95.96%, the parking spots can be subjected to rolling and acid cleaning, and the practicability of the acid cleaning rolling method is improved as rolled steel coil can be used as adjusting material for continuous annealing lines to adjust furnace temperature in the connection of steel balls.

Description

technical field [0001] The invention relates to the technical field of steel rolling, and is mainly applicable to a pickling and rolling method for cold rolling parking spots. Background technique [0002] Since the pickling line needs to be shut down for minor repairs every week, such as replacing consumables such as squeeze rolls, backup rolls, and shears, the downtime is often 8-24 hours, and the strip steel staying in the pickling tank is caused by the drop of acid solution. Severe corrosion, uneven thickness, and reduced ductility, so shutdown coils are often not rolled and treated as scrap steel. [0003] According to the statistical data, it is found that every time the acid rolling sealer is used to run through the whole line with ordinary carbon steel, about 13 tons of waste coils with parking spots will be generated when the car is started again, and about 40 tons of waste coils will be generated after three inspections per month. Due to the closure of the machine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/30B21B37/00B21B45/02C23G3/02
Inventor 付光李广林陈伟张誉公赵运攀马家骥
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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