Silicon steel acid cleaning stabilizing material and application method thereof

A technology of stabilizing materials, silicon steel acid, applied in the field of pickling, can solve the problems of increasing broken belt and edge cracking accidents, affecting the production capacity of the unit, increasing the brittleness of silicon steel, etc., so as to avoid excessive pickling, reduce pickling energy consumption, and improve belt The effect of steel yield

Active Publication Date: 2013-05-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the former method will greatly increase the production cost, and the latter method will affect the production capacity of the unit. At the same time, these two methods will make the exposed metal directly contact with the acid, and the hydrogen atoms formed during the contact between the metal and the acid It will quickly penetrate into the metal body, further increase the brittleness of silicon steel, and greatly increase the occurrence of strip breakage and edge cracking accidents during strip rolling

Method used

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  • Silicon steel acid cleaning stabilizing material and application method thereof
  • Silicon steel acid cleaning stabilizing material and application method thereof
  • Silicon steel acid cleaning stabilizing material and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Pickling of non-chemical silicon steel

[0037] Pickling Accelerator:

[0038]

[0039] Inhibitors:

[0040]

[0041] Add the pickling accelerator into the second pickling tank according to the proportion of 2.0% of the acid liquid circulation volume, keep the concentration of hydrochloric acid in the first pickling tank between 3% and 5%, and the temperature is 85°C. The concentration of hydrochloric acid in the tank is between 4% and 6%, the temperature is 83°C, and the inhibitor is added to the third pickling tank according to the proportion of 0.5% of the acid liquid circulation, and the concentration of hydrochloric acid in the third pickling tank is kept at 8-6%. Between 10%, the temperature is at 80°C.

[0042] Adopt above-mentioned embodiment silicon steel pickling stabilizing material and pickling process parameter, can make the unit pickling speed of turbulent flow pickling unit reach 200 m / min when pickling exempt from normalization sili...

Embodiment 2

[0043] Embodiment 2: Pickling of non-chemical silicon steel

[0044] Pickling Accelerator:

[0045]

[0046] Inhibitors:

[0047]

[0048] Add the pickling accelerator to the second pickling tank according to the proportion of 2.0% of the acid liquid circulation volume, keep the concentration of hydrochloric acid in the first pickling tank between 3.5 and 6.5%, and the temperature is 80°C. The concentration of hydrochloric acid in the tank is between 7% and 12%, the temperature is 83°C, and the inhibitor is added to the third pickling tank according to the proportion of 1.5% of the acid liquid circulation, and the concentration of hydrochloric acid in the third pickling tank is kept at 8-10%. Between 14%, the temperature is at 80°C.

[0049] Adopt above-mentioned embodiment silicon steel pickling stabilizing material and pickling process parameter, can make the unit pickling speed of turbulent flow pickling unit reach 200 m / min when pickling exempt from normalization s...

Embodiment 3

[0050] Embodiment 3: pickling of normalized silicon steel

[0051] pickling accelerator

[0052]

[0053] Inhibitors:

[0054]

[0055] The pickling stabilizer prepared according to the above formula is added to the second pickling tank according to the proportion of 0.5% of the acid liquid circulation, and the concentration of hydrochloric acid in the first pickling tank is kept at 3-5%. between, the temperature is 85°C, the concentration of hydrochloric acid in the second pickling tank is between 4% and 6%, the temperature is 80°C, and the inhibitor is added to the third pickling tank according to the proportion of 0.5% of the acid liquid circulation, keeping The concentration of hydrochloric acid in the third pickling tank is between 8% and 10%, and the temperature is at 75°C.

[0056] Adopt above-mentioned embodiment silicon steel pickling stabilizing material and pickling process parameter, can make the unit pickling speed of turbulent flow pickling unit reach 230...

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Abstract

The invention discloses a silicon steel acid cleaning stabilizing material and an application method thereof. The silicon steel acid cleaning stabilizing material comprises an acid cleaning accelerator and an inhibitor, wherein the acid cleaning accelerator comprises the following components in percentage by weight: 5-20% of surfactant, 5-20% of organic metal chelating agent, 20-40% of reducing agent and 20-40% of water; and the inhibitor comprises the following components in percentage by weight: 10-30% of urotropin, 10-50% of diethylene glycol, 5-15% of o-xylene thiourea, 0-10% of fatty alcohol-polyoxyethylene ether and the balance of water. According to the invention, the silicon steel acid cleaning speed is increased, the speed of hydrogen atom entering strip steel is reduced, the aims of increasing the acid cleaning speed, reducing the acid cleaning temperature, reducing the consumption of hydrochloric acid and reducing brittleness of silicon steel are reached, and stable operation of silicon steel acid cleaning production is realized.

Description

technical field [0001] The invention relates to pickling technology, in particular to a silicon steel pickling stabilization material and a use method thereof. Background technique [0002] Pickling is an essential process in the production process of cold-rolled strip steel. The quality of pickling has an important impact on the quality of the surface of cold-rolled strip steel and the continuity of the rolling process. In the production process of cold-rolled silicon steel, the difficulty of pickling is increased due to the oxide scale on the surface of silicon steel containing silicon compounds. In order to increase the pickling speed of silicon steel, on the one hand, shot blasting is used to remove the scale on the surface of hot-rolled strip steel before pickling; on the other hand, the purpose of removing the scale on the surface is achieved by reducing the pickling speed. . Obviously, the former method will greatly increase the production cost, and the latter metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/02C23G1/06C23G1/08
Inventor 陶登国宋俊曾建峰金国章培莉韩卫国王廷吴胜锋宋艳丽
Owner BAOSHAN IRON & STEEL CO LTD
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