Steel strip degreasing process

A degreasing process and technology for steel strips, applied in the field of degreasing of steel strips, can solve the problems of difficulty in meeting the needs of high-grade tin plating production, low efficiency, and high residual debris on the surface of steel strips, so as to improve the efficiency of oil pollution removal, high investment returns, The overall process is simple and easy to implement

Active Publication Date: 2016-04-20
TIANJIN FUREN STRIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of production practices have proved that the degreasing efficiency of the aforementioned process is not only low, but also the residual impurities on the surface of the steel strip are still high, which is difficult to meet the production needs of high-grade tin plating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A steel strip degreasing process, comprising the following steps:

[0037] Step A: pre-cleaning the steel strip, using 2% NaOH solution for pre-cleaning, and the pre-cleaning temperature is 50°C.

[0038] Step B: chemical degreasing, using a degreasing solution with a concentration of 2%, and the degreasing temperature is 50°C. The degreasing solution is prepared with low-foaming degreasing powder, stirred evenly, and the alkali point is 30g / L.

[0039] Step C: Spray and brush for the first time, use an alkali brush tank, the alkali point is 35g / L, the temperature is 60°C, and the speed of the brush roller is not lower than 1000 rpm.

[0040] Step D: Electrolytic degreasing, electrolysis current 2600A, current density 15A / d㎡, electrode reversed every 30 minutes, alkali point 45g / L, electrolysis temperature 60°C.

[0041] Step E: cleaning section, further comprising:

[0042] Step a: lye cleaning;

[0043] Step b: Spray and scrub for the second time;

[0044] Step c...

Embodiment 2

[0052] A steel strip degreasing process, comprising the following steps:

[0053] Step A: pre-cleaning the steel strip, using 1% NaOH solution for pre-cleaning, and the pre-cleaning temperature is 40°C.

[0054] Step B: chemical degreasing, using a degreasing solution with a concentration of 3%, and the degreasing temperature is 60°C. The degreasing solution is prepared with low-foaming degreasing powder, stirred evenly, and the alkali point is 50g / L.

[0055] Step C: Spray and brush for the first time, use an alkali brush tank, the alkali point is 80g / L, the temperature is 65°C, and the speed of the brush roller is not lower than 1000 rpm.

[0056] Step D: Electrolytic degreasing, electrolysis current 2550A, current density 14A / d㎡, electrode reversed every 30 minutes, alkali point 120g / L, electrolysis temperature 70°C.

[0057] Step E: cleaning section, further comprising:

[0058] Step a: lye cleaning;

[0059] Step b: Spray and scrub for the second time;

[0060] Step ...

Embodiment 3

[0068] A steel strip degreasing process, comprising the following steps:

[0069] Step A: pre-cleaning the steel strip, using a 3% NaOH solution for pre-cleaning, and the pre-cleaning temperature is 60°C.

[0070] Step B: chemical degreasing, using a degreasing solution with a concentration of 4%, and the degreasing temperature is 70°C. The degreasing solution is prepared with low-foaming degreasing powder, stirred evenly, and the alkali point is 70g / L.

[0071] Step C: Spray and brush for the first time, use an alkali brush tank, the alkali point is 90g / L, the temperature is 70°C, and the speed of the brush roller is not lower than 1000 rpm.

[0072] Step D: Electrolytic degreasing, the electrolytic current is 2650A, the current density is 16A / d㎡, the electrode is reversed every 30 minutes, the alkali point is 140g / L, and the electrolytic temperature is 80°C.

[0073] Step E: cleaning section, further comprising:

[0074] Step a: lye cleaning;

[0075] Step b: Spray and s...

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PUM

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Abstract

The invention discloses a steel strip degreasing process. The steel strip degreasing process comprises the steps of: steel strip precleaning, chemical degreasing, spray brushing, electrolytic degreasing, cleaning section and hot air drying. The steel strip degreasing process has the following advantages and beneficial effects: as steel strip degreasing production line and process are improved, the viscosity of oil stains on a steel strip is reduced, the infiltration capacity with alkaline liquid is improved, the oil stain removing efficiency is promoted,the whole degreasing efficiency is improved, the practicability is strong, and the operability is excellent; and the process is simple and feasible, is convenient to realize, is obvious in product quality promoting effect, and is high in improvement and transformation investment benefits.

Description

technical field [0001] The invention belongs to the technical field of steel strip degreasing, and in particular relates to a steel strip degreasing process. Background technique [0002] In the process of tinning the steel strip, the degreasing process is to use the cleaning method to remove the oil, iron filings and dust attached to the surface of the raw material steel strip in the previous process, so as to obtain a fully clean surface of the steel strip. At present, the technological process used in the degreasing step in the industry mainly includes: lye soaking, lye scrubbing, electrolytic degreasing, acid solution rust removal, water scrubbing and water rinsing. However, a large number of production practices have proved that the efficiency of degreasing using the aforementioned process is not only low, but also the residual impurities on the surface of the steel strip are still high, which is difficult to meet the production needs of high-grade tin plating. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F1/06C23G1/19
CPCC23G1/19C25F1/06
Inventor 马汝娥
Owner TIANJIN FUREN STRIP
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