Method for controlling hot rolling aluminum plate quality

Abstract

The invention relates to a method for controlling hot rolling aluminum plate quality, particularly to a method for controlling black silk and black line on the surface of the hot rolling aluminum plate. The method comprises a lubricating system which is characterized in 1) lubricating liquid: adopting a non-ionic lubricating liquid; 2) consistence: controlling the consistence of the lubricating liquid to be 2.5% to 4.0%; 3) pH value: controlling the pH value of the lubricating liquid to be 5.5 to 7.5; 4) temperature: controlling the temperature of the lubricating liquid to be 40 DEG C to 65 DEG C; 5) granularity: controlling the milk granule of the lubricating liquid to be 0.9 to 0.1 Mum; 6) lubricating grease content: controlling the lubricating grease content of the lubricating liquid to be 25% to 30 %. According to the invention, the lubricating liquid of a rolling mill is replaced from an anionic type into the non-ionic lubricating liquid, and through the control of the consistence, the pH value, the temperature, the granularity and the lubricating grease content of the lubricating liquid in an appropriate range, the lubricating property of the lubricating system can be effectively improved, the aluminum bonding layer thickness of a working roll is greatly reduced, and the quality problems of the black silk and the black line on the surface of the hot rolling product are solved.

Description

technical field [0001] The invention relates to a method for controlling the quality of a hot-rolled aluminum plate, in particular to a method for controlling black threads and black lines on the belt surface of a hot-rolled aluminum plate. Background technique [0002] With the development of my country's economy, the competition in the aluminum processing industry is becoming increasingly fierce, and users' requirements for the appearance of products are constantly improving. At present, domestic hot-rolled high-end products are mainly imported, and the cost is relatively high. The main factors affecting the product quality of aluminum hot rolling mills are black wires and black lines on the surface of plates and strips, which not only affect the output of aluminum hot rolling mills, but also seriously affect product grades and prices, which is not conducive to the market competitiveness of products. [0003] At present, the main method to solve the black wire and black li...

AI Technical Summary

Problems solved by technology

The main factor affecting the product quality of the aluminum hot rolling mill is the black wire and black line on the surface of the plate and strip, which not only affects the output of the aluminum hot rolling mill, but also seriously affects the product grade and price, which is not conducive to the market competitiveness of the product

[0003] At present, the main method to solve the black wire and black line of the aluminum strip is to adjust the lubrication system to improve the lubricating ability of the emulsion under different rolling conditions, and at the same time cooperate with the use of the roll cleaner of the rolling mill to reduce the thickness of the sticky aluminum layer of the roll , but due to the poor stability of the lubricating fluid used in the hot rolling lubrication system, the thickness of the formed sticky aluminum layer is different, resulting in frequent adjustments in the production process, resulting in fluctuations in product quality, which seriously affect product quality and output

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