CN102400156A - Acid-washing method of hot-rolled coiled plate - Google Patents
Acid-washing method of hot-rolled coiled plate Download PDFInfo
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- CN102400156A CN102400156A CN2010102862334A CN201010286233A CN102400156A CN 102400156 A CN102400156 A CN 102400156A CN 2010102862334 A CN2010102862334 A CN 2010102862334A CN 201010286233 A CN201010286233 A CN 201010286233A CN 102400156 A CN102400156 A CN 102400156A
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Abstract
The invention discloses an acid-washing method of a hot-rolled coiled plate, wherein hydrochloric acid with the concentration of 30-33 percent and a corrosion-inhibition fog inhibitor are used. The acid-washing method comprises the following steps of: heating an acid-washing solution containing the hydrochloric acid with concentration of 15-19 percent and the corrosion-inhibition fog inhibitor with concentration of 0.01-0.03 percent to 71-80 DEG C; acid-washing the hot-rolled coiled plate by using the acid-washing solution; and forming a protection layer on the surface of the hot-rolled coiled plate. The acid-washing method disclosed by the invention has the advantages of having remarkable effect, increasing yield, saving funds, accelerating acid-washing speed, improving acid-washing quality, improving environment, reducing corrosion to plants and equipment and harms to health of human body and being very considerable in economic benefits and social benefits and is suitable for steel and iron enterprises of cold rolling production.
Description
Technical field
The present invention relates to acid washing method, more particularly, it relates to the hot-rolled coil acid washing method.
Background technology
In Industrial processes, need carry out pickling to hot-rolled coil etc.In acid cleaning process, can produce a large amount of acid mists, make production on-site environment seriously polluted, health of human body, factory building, equipment are caused damage.In addition, also cause the overpickling phenomenon during pickling easily, influence workpiece processing, cause workpiece to be scrapped when serious.And traditional method, facility investment is big, and energy consumption is big, and effect has certain limitation.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of acid mist concentration and acid consumption of in acid cleaning process, reducing is provided, lower the steel loss, improve the hot-rolled coil acid washing method of pickling speed and solution " hydrogen embrittlement " and overpickling phenomenon.
In order to solve the technical problem of above-mentioned existence, the present invention adopts following technical proposals:
Comprise that concentration is hydrochloric acid, the corrosion-retarding fog inhibitor of 30-33%, contain concentration of hydrochloric acid and be 15%-19%, slow corrosion inhibiting fog agent concentration and be 0.1 ‰-0.3 ‰ Acidwash solution at the interchanger internal heating to 71-80 ℃; With above-mentioned Acidwash solution pickling hot-rolled coil; Form resist on said hot-rolled coil surface.
Concentration of hydrochloric acid is 15%-18% in the said Acidwash solution.
The said temperature that contains the Acidwash solution of corrosion-retarding fog inhibitor is 71-75 ℃.
Compared with prior art, the beneficial effect of hot-rolled coil acid washing method of the present invention is:
It is obvious to use this method effect, can improve lumber recovery.Thereby economize on the use of funds.Accelerate pickling speed, improve pickling quality, improve environment, lower the injury of acid mist factory building, corrosion on Equipment and health of human body.Economic benefit and social benefit are all very considerable.
Embodiment
Be described further in the face of the present invention down:
Embodiment 1
In acid cleaning process, be in the hydrochloric acid of 30-33% in concentration, add entry or original condensation acid and stir that to be mixed with concentration of hydrochloric acid be 15%-19% solution.Then this solution acid storage tank of packing into; In said acid storage tank, add corrosion-retarding fog inhibitor; Formation contains the Acidwash solution that concentration is 0.1 ‰-0.3 ‰ corrosion-retarding fog inhibitors; The JBL-100 washing corrosion-retarding fog inhibitor that good times of grand Science and Technology Ltd. of GHCY-1 pickling iron and steel corrosion-retarding fog inhibitor or Tianjin that said corrosion-retarding fog inhibitor adopts Tianmen environmental science and technology ltd of Guohe to produce produces, this Acidwash solution is heated to 71-80 ℃ at the interchanger internal recycle, stirs.With said Acidwash solution hot-rolled coil is carried out pickling, form fine and close resist on the hot-rolled coil surface.This resist can suppress the corrosion of hot-rolled coil, makes by the protection hot-rolled coil corrosion failure does not take place, and promptly the overpickling phenomenon can not occur.But do not hinder the dissolving of corrosion product (oxide debris) and come off, when removing oxide compound, separate out small quantity of hydrogen and help oxide compound and remove, and do not influence the physicals of hot-rolled coil from the hot-rolled coil surface.
Said ratio concentration is weight percentage.
Embodiment 2
In acid cleaning process, be in the hydrochloric acid of 30-33% in concentration, add entry or original condensation acid and stir that to be mixed with concentration of hydrochloric acid be 15%-18% solution.Then this solution acid storage tank of packing into; In said acid storage tank, add corrosion-retarding fog inhibitor; Formation contains the Acidwash solution that concentration is 0.1 ‰-0.3 ‰ corrosion-retarding fog inhibitors; The JBL-100 washing corrosion-retarding fog inhibitor that good times of grand Science and Technology Ltd. of GHCY-1 pickling iron and steel corrosion-retarding fog inhibitor or Tianjin that said corrosion-retarding fog inhibitor adopts Tianmen environmental science and technology ltd of Guohe to produce produces, this Acidwash solution is heated to 71-80 ℃ at the interchanger internal recycle, stirs.With said Acidwash solution hot-rolled coil is carried out pickling, form fine and close resist on the hot-rolled coil surface.This resist can suppress the corrosion of hot-rolled coil, makes by the protection hot-rolled coil corrosion failure does not take place, and promptly the overpickling phenomenon can not occur.But do not hinder the dissolving of corrosion product (oxide debris) and come off, when removing oxide compound, separate out small quantity of hydrogen and help oxide compound and remove, and do not influence the physicals of hot-rolled coil from the hot-rolled coil surface.
Embodiment 3
In acid cleaning process, be in the hydrochloric acid of 30-33% in concentration, add entry or original condensation acid and stir that to be mixed with concentration of hydrochloric acid be 15%-19% solution.Then this solution acid storage tank of packing into; In said acid storage tank, add corrosion-retarding fog inhibitor; Formation contains the Acidwash solution that concentration is 0.1 ‰-0.3 ‰ corrosion-retarding fog inhibitors; The JBL-100 washing corrosion-retarding fog inhibitor that good times of grand Science and Technology Ltd. of GHCY-1 pickling iron and steel corrosion-retarding fog inhibitor or Tianjin that said corrosion-retarding fog inhibitor adopts Tianmen environmental science and technology ltd of Guohe to produce produces, this Acidwash solution is heated to 71-75 ℃ at the interchanger internal recycle, stirs.With said Acidwash solution hot-rolled coil is carried out pickling, form fine and close resist on the hot-rolled coil surface.This resist can suppress the corrosion of hot-rolled coil, makes by the protection hot-rolled coil corrosion failure does not take place, and promptly the overpickling phenomenon can not occur.But do not hinder the dissolving of corrosion product (oxide debris) and come off, when removing oxide compound, separate out small quantity of hydrogen and help oxide compound and remove, and do not influence the physicals of hot-rolled coil from the hot-rolled coil surface.
It is obvious to use this method effect, can improve lumber recovery, thereby can practice thrift substantial contribution.The speed of having accelerated pickling has simultaneously improved pickling quality, improves environment, lowers the injury of acid mist to factory building, corrosion on Equipment and health of human body.Have very considerable social benefit and economic benefit.
The above is merely an instance of the present invention, and simultaneously instance does not limit the present invention, and is all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a hot-rolled coil acid washing method comprises that concentration is hydrochloric acid, the corrosion-retarding fog inhibitor of 30-33%, it is characterized in that, contain concentration of hydrochloric acid and be 15%-19%, slow corrosion inhibiting fog agent concentration and be 0.1 ‰-0.3 ‰ Acidwash solution at the interchanger internal heating to 71-80 ℃; With above-mentioned Acidwash solution pickling hot-rolled coil; Form resist on said hot-rolled coil surface.
2. hot-rolled coil acid washing method according to claim 1 is characterized in that, concentration of hydrochloric acid is 15%-18% in the said Acidwash solution.
3. hot-rolled coil acid washing method according to claim 1 is characterized in that, the said temperature that contains the Acidwash solution of corrosion-retarding fog inhibitor is 71-75 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102862334A CN102400156A (en) | 2010-09-19 | 2010-09-19 | Acid-washing method of hot-rolled coiled plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102862334A CN102400156A (en) | 2010-09-19 | 2010-09-19 | Acid-washing method of hot-rolled coiled plate |
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| Publication Number | Publication Date |
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| CN102400156A true CN102400156A (en) | 2012-04-04 |
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| CN2010102862334A Pending CN102400156A (en) | 2010-09-19 | 2010-09-19 | Acid-washing method of hot-rolled coiled plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541737A (en) * | 2016-06-27 | 2018-01-05 | 宝山钢铁股份有限公司 | The method for improving belt steel surface pickling quality |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831659A (en) * | 2009-03-09 | 2010-09-15 | 鞍钢股份有限公司 | Pickling inhibitor and using method thereof |
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2010
- 2010-09-19 CN CN2010102862334A patent/CN102400156A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831659A (en) * | 2009-03-09 | 2010-09-15 | 鞍钢股份有限公司 | Pickling inhibitor and using method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107541737A (en) * | 2016-06-27 | 2018-01-05 | 宝山钢铁股份有限公司 | The method for improving belt steel surface pickling quality |
| CN107541737B (en) * | 2016-06-27 | 2019-07-23 | 宝山钢铁股份有限公司 | The method for improving belt steel surface pickling quality |
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Application publication date: 20120404 |