CN104372357A - Production method of pickling line with cracked acid tank - Google Patents
Production method of pickling line with cracked acid tank Download PDFInfo
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- CN104372357A CN104372357A CN201410699359.2A CN201410699359A CN104372357A CN 104372357 A CN104372357 A CN 104372357A CN 201410699359 A CN201410699359 A CN 201410699359A CN 104372357 A CN104372357 A CN 104372357A
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Abstract
The invention provides a production method of a pickling line with a cracked acid tank, relates to the technical field of pickling lines and aims at solving the problem that the pickling line is stopped as an acid tank is cracked. The production method of the pickling line with the cracked acid tank mainly comprises the following steps: (1) adjusting equipment, namely firstly closing an acid circulating pump between the cracked acid tank and a corresponding acid trough, closing a connecting pipeline between the cracked acid tank and bottoms of the other acid tanks, and sequentially communicating the bottoms of the other acid tanks except the cracked acid tank; secondly locking an electrical element in an electrical loop corresponding to the cracked acid tank; and thirdly evacuating the acid trough corresponding to the cracked acid tank; (2) adjusting pickling technological parameters according to different strip steel types. The production method of the pickling line with the cracked acid tank has the advantages that the cracked acid tank is 'removed' by adjusting the equipment; technological parameters during pickling are changed by adjusting a technology, so that pickling quality is guaranteed under the condition that effective pickling time is reduced; and the pickling line is not stopped by adjusting the equipment and the technological parameters, so that loss caused by stopping of the equipment is reduced.
Description
Technical field
The present invention relates to pickling machine technical group field, specifically a kind of sour tank when pickling unit break after do not shut down continuation production method.
Background technology
As the first working procedure of cold rolling industry, pickling unit main technique function is remove the iron scale on incoming hot rolled slab surface, according to the difference of machine set type (plug-type or continous way), usually adopts 3 ~ 5 grades of pickling.
Acid tank is the container of storage acid solution, and the material of sour tank adopts glass reinforced plastic usually, and under high temperature and highly acid working conditions, its life is 8 ~ 10 years.Therefore, pickling unit continuous seepage more than 6 years after, the probability that sour tank breaks increases greatly.Once generation break accident, will production line be directly caused to stop production.Because sour tank is not spare part routinely; therefore occur after sour tank breaks; pickling unit is needed to stop production; contact the sour tank of sour tank farms man new production one; then install after delivering in factory, to resume production, from sour tank collapse to eo-acid tank is installed after again produce before; the whole time is about 20 ~ 30 days, and stop time is longer.Because pickling unit stops production, the milling train of postorder, annealing and the operation such as zinc-plated also can stop production, and cause extreme influence to the organization of production of cold rolling mill.
Summary of the invention
Production method after the object of the present invention is to provide a kind of pickling unit acid tank to break, for solving because sour tank breaks the problem of the pickling compressor emergency shutdown caused.
The present invention solves the technical scheme that its technical problem takes: the production method after pickling unit acid tank breaks, is characterized in that, mainly comprise the following steps:
(1) adjustment of equipment
1. close the acid circulating pump broken between sour tank with corresponding acid tank, close the connecting tube that this breaks between sour tank and other sour pot bottom, and the bottom of the sour tank that do not break is connected together successively;
2. the electrical element in the electric loop corresponding with the sour tank that breaks is locked;
3. the acid tank that the emptying sour tank that breaks is corresponding;
(2) adjustment of technique
The adjustment of acid cleaning process parameter is carried out according to the difference of band steel steel grade, acid cleaning process parameter comprises acid liquor temperature, acid strength and pickling speed, the entrance raising the acid tank corresponding with the sour tank that breaks while adjustment acid cleaning process parameter sprays beam and exports the nozzle angle spraying beam, make it change transverse horizontal into by original downward-sloping 45 degree, and raise the corresponding squeezing roller of the sour tank that to break with this.
Further, described electrical element comprises butterfly valve, hot recycle pump, sour pump and heat exchanger.
Further, the concrete operations of the acid tank that the emptying sour tank that breaks is corresponding are open acid tank groove lid corresponding to the sour tank that breaks, and check residual acid solution and rinse with water.
Further, be with steel successively through three acid tanks during pickling, for the band steel that general carbon steel is made, the acid strength in acid tank corresponding for the sour tank that do not break first passed be adjusted to 40 ~ 80g/L, acid liquor temperature is adjusted to 82 ~ 88 DEG C, is adjusted to by pickling speed and is less than or equal to 120m/min; Acid strength in acid tank corresponding for the rear sour tank that do not break passed is adjusted to and is more than or equal to 120g/L; Acid liquor temperature is adjusted to 77 ~ 83 DEG C, and pickling speed is adjusted to 80 ~ 100m/min.
Further, be with steel successively through three acid tanks during pickling, for the band steel that special steel is made, the acid strength in acid tank corresponding for the sour tank that do not break first passed be adjusted to 40 ~ 80g/L, acid liquor temperature is adjusted to 82 ~ 88 DEG C, is adjusted to by pickling speed and is less than or equal to 120m/min; Acid strength in acid tank corresponding for the rear sour tank that do not break passed is adjusted to and is more than or equal to 140g/L; Acid liquor temperature is adjusted to 77 ~ 83 DEG C, and pickling speed is adjusted to 60 ~ 90m/min.
The invention has the beneficial effects as follows: the production method after pickling unit provided by the invention acid tank breaks, being broken sour tank " excisions " by equipment adjustment, and realizing the pickling to being with steel by the sour tank that do not break; By technique adjustment, change processing parameter during pickling, to make to reduce in sour tank quantity, effectively pickling time decreased ensure the quality of pickling.By the adjustment of equipment and process parameter, pickling lines is not shut down, and the quality of pickling can be ensured, reduce the loss because equipment downtime causes.
Embodiment
After acid tank breaks, the present invention realizes working on of pickling unit by following steps.
1, equipment adjustment
(1) close the acid circulating pump broken between sour tank with corresponding acid tank, close the connecting tube that this breaks between sour tank and other sour pot bottom, and the bottom of the sour tank that do not break is connected together successively.Be described for the pickling unit being provided with three sour tanks, three sour tanks are respectively No. 1 sour tank arranged in turn, No. 2 sour tanks and No. 3 sour tanks, and the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks and No. 3 acid tanks.When No. 1 sour tank breaks, then close the acid circulating pump between No. 1 sour tank and No. 1 acid tank, make the acid solution in No. 1 sour tank can not enter in No. 1 acid tank, the acid solution in No. 1 acid tank can not be back in No. 1 sour tank; Close the manually-operated gate on the connecting tube between No. 1 sour tank and No. 2 sour pot bottoms, to cut off the connection between No. 1 sour tank and No. 2 sour tanks, make the acid solution in No. 2 sour tanks can not flow in No. 1 sour tank; Now because No. 2 sour tanks are still communicated with by connecting tube with the bottom of No. 3 sour tanks, therefore do not need the bottom of No. 2 sour tanks and No. 3 sour tanks by together with pipeline communication.
When No. 2 sour tanks break, then close the acid circulating pump between No. 2 sour tanks and No. 2 acid tanks, make the acid solution in No. 2 sour tanks can not enter in No. 2 acid tanks, the acid solution in No. 2 acid tanks can not be back in No. 2 sour tanks; Close the manually-operated gate on the connecting tube between No. 1 sour tank and No. 2 sour pot bottoms, to cut off the connection between No. 1 sour tank and No. 2 sour tanks, make the acid solution in No. 1 sour tank can not flow in No. 2 sour tanks; Close the manually-operated gate on the connecting tube between No. 2 sour tanks and No. 3 sour pot bottoms, to cut off the connection between No. 2 sour tanks and No. 3 sour tanks, make the acid solution in No. 3 sour tanks can not flow in No. 2 sour tanks; By pipeline, No. 1 sour tank is communicated with the bottom of No. 3 sour tanks, and manually-operated gate is set on the pipeline of connection No. 1 sour tank and No. 3 sour pot bottoms.
When No. 3 sour tanks break, then close the acid circulating pump between No. 3 sour tanks and No. 3 acid tanks, make the acid solution in No. 3 sour tanks can not enter in No. 3 acid tanks, the acid solution in No. 3 acid tanks can not be back in No. 3 sour tanks; Close the manually-operated gate on the connecting tube between No. 3 sour tanks and No. 2 sour pot bottoms, to cut off the connection between No. 3 sour tanks and No. 2 sour tanks, make the acid solution in No. 2 sour tanks can not flow in No. 3 sour tanks; Now because No. 2 sour tanks are still communicated with by connecting tube with the bottom of No. 1 sour tank, therefore do not need the bottom of No. 2 sour tanks and No. 1 sour tank by together with pipeline communication.
(2) electrical element in the electric loop corresponding with the sour tank that breaks is locked.Needing in the electric loop corresponding with the sour tank that breaks comprises butterfly valve, hot recycle pump, sour pump and heat exchanger into line-locked electrical element, by locking above-mentioned electrical element, eliminate guard signal, namely can not because of the warning stopping production that cause above-mentioned electrical element of breaking of sour tank.
(3) acid tank that the emptying sour tank that breaks is corresponding.
To be provided with the pickling unit of three sour tanks, three sour tanks are respectively No. 1 sour tank set gradually, No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks and No. 3 acid tanks, when No. 1 sour tank breaks, open the groove lid of No. 1, No. 2 and No. 3 acid tank, check residual acid in groove and rinse with water, guaranteeing that No. 1 acid tank is emptied completely; Raise the nozzle angle of entrance spray beam corresponding to No. 1 acid tank and outlet spray beam, it is made to change transverse horizontal into by original downward-sloping 45 degree, raise the squeezing roller corresponding with No. 1 sour tank, to prevent from being with steel by the damage because causing with the contact of acid tank during No. 1 acid tank simultaneously.
2, the adjustment of acid cleaning process
Due to breaking of sour tank, band steel passes through acid tank corresponding to the sour tank that breaks, and band steel sky crosses the actual pickling time minimizing that acid tank (namely acid solution does not contact with the strip) causes being with steel.To be provided with three sour tanks, when the total length of acid tank is 60m, when under normal production scenarios, pickling speed is 60m/min, pickling time is 60 seconds.After certain sour tank breaks, do not have acid solution in the acid tank corresponding with this sour tank, the empty mistake of band steel, if pickling speed is still 60m/min, then effectively pickling time is 40 seconds, makes to be with the pickling time of steel to greatly reduce.For ensureing the quality product of pickling, need to adjust acid cleaning process, to ensure that basic maintenance pickling quality is unaffected when pickling decline working lipe.The adjustment of acid cleaning process will be formulated according to the difference of band steel steel grade, and the adjustment of acid cleaning process is mainly the adjustment of acid cleaning process index, and acid cleaning process index is mainly acid liquor temperature, acid strength and pickling speed.
Break for No. 1 sour tank, acid tank is total up to three, be respectively No. 1 sour tank set gradually, No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks and No. 3 acid tanks, specifically be adjusted to: the acid strength of No. 2 acid tanks is adjusted to 40 ~ 80g/L, acid liquor temperature is 82 ~ 88 DEG C, pickling speed is less than and equals 120m/min, when being with steel to be general carbon steel, preferred pickling speed is 80 ~ 100m/min, and when being with steel to be special steel, preferred pickling speed is 60 ~ 90m/min.Adjust the acid solution in No. 3 acid tanks, adjustment mode is: when being with steel to be general carbon steel, acid strength is greater than and equals 120g/L; When being with steel to be special steel, acid strength is greater than and equals 140g/L; Acid liquor temperature is 77 ~ 83 DEG C; Pickling speed is less than and equals 120m/min, and when being with steel to be general carbon steel, preferred pickling speed is 80 ~ 100m/min, and when being with steel to be special steel, preferred pickling speed is 60 ~ 90m/min.When the acid strength in No. 2 acid tanks and No. 3 acid tanks is not up to standard, increases sampling frequency, and shut down 15min and carry out changing acid.
Break for No. 2 sour tanks, acid tank is total up to three, be respectively No. 1 sour tank set gradually, No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks and No. 3 acid tanks, specifically be adjusted to: the acid strength of No. 1 acid tank is adjusted to 40 ~ 80g/L, acid liquor temperature is 82 ~ 88 DEG C, pickling speed is less than and equals 120m/min, when being with steel to be general carbon steel, preferred pickling speed is 80 ~ 100m/min, and when being with steel to be special steel, preferred pickling speed is 60 ~ 90m/min.Adjust the acid solution in No. 3 acid tanks, adjustment mode is: when being with steel to be general carbon steel, acid strength is greater than and equals 120g/L; When being with steel to be special steel, acid strength is greater than and equals 140g/L; Acid liquor temperature is 77 ~ 83 DEG C; Pickling speed is less than and equals 120m/min, and when being with steel to be general carbon steel, preferred pickling speed is 80 ~ 100m/min, and when being with steel to be special steel, preferred pickling speed is 60 ~ 90m/min.When the acid strength in No. 1 acid tank and No. 3 acid tanks is not up to standard, increases sampling frequency, and shut down 15min and carry out changing acid.
Break for No. 3 sour tanks, acid tank is total up to three, be respectively No. 1 sour tank set gradually, No. 2 sour tanks and No. 3 sour tanks, the acid tank corresponding with three sour tanks is respectively No. 1 acid tank, No. 2 acid tanks and No. 3 acid tanks, specifically be adjusted to: the acid strength of No. 1 acid tank is adjusted to 40 ~ 80g/L, acid liquor temperature is 82 ~ 88 DEG C, pickling speed is less than and equals 120m/min, when being with steel to be general carbon steel, preferred pickling speed is 80 ~ 100m/min, and when being with steel to be special steel, preferred pickling speed is 60 ~ 90m/min.Adjust the acid solution in No. 2 acid tanks, adjustment mode is: when being with steel to be general carbon steel, acid strength is greater than and equals 120g/L; When being with steel to be special steel, acid strength is greater than and equals 140g/L; Acid liquor temperature is 77 ~ 83 DEG C; Pickling speed is less than and equals 120m/min, and when being with steel to be general carbon steel, preferred pickling speed is 80 ~ 100m/min, and when being with steel to be special steel, preferred pickling speed is 60 ~ 90m/min.When the acid strength in No. 1 acid tank and No. 3 acid tanks is not up to standard, increases sampling frequency, and shut down 15min and carry out changing acid.
Claims (5)
1. pickling unit acid tank break after production method, it is characterized in that, mainly comprise the following steps:
(1) adjustment of equipment
1. close the acid circulating pump broken between sour tank with corresponding acid tank, close the connecting tube that this breaks between sour tank and other sour pot bottom, and the bottom of the sour tank that do not break is connected together successively;
2. the electrical element in the electric loop corresponding with the sour tank that breaks is locked;
3. the acid tank that the emptying sour tank that breaks is corresponding;
(2) adjustment of technique
The adjustment of acid cleaning process parameter is carried out according to the difference of band steel steel grade, acid cleaning process parameter comprises acid liquor temperature, acid strength and pickling speed, the entrance raising the acid tank corresponding with the sour tank that breaks while adjustment acid cleaning process parameter sprays beam and exports the nozzle angle spraying beam, make it change transverse horizontal into by original downward-sloping 45 degree, and raise the corresponding squeezing roller of the sour tank that to break with this.
2. pickling unit according to claim 1 acid tank break after production method, it is characterized in that, described electrical element comprises butterfly valve, hot recycle pump, sour pump and heat exchanger.
3. pickling unit according to claim 2 acid tank break after production method, it is characterized in that, the concrete operations of the acid tank that the emptying sour tank that breaks is corresponding are open acid tank groove lid corresponding to the sour tank that breaks, and check that residual acid solution is also rinsed with water.
4. pickling unit according to claim 3 acid tank break after production method, it is characterized in that, be with steel successively through three acid tanks during pickling, for the band steel that general carbon steel is made, acid strength in acid tank corresponding for the sour tank that do not break first passed is adjusted to 40 ~ 80g/L, acid liquor temperature is adjusted to 82 ~ 88 DEG C, is adjusted to by pickling speed and is less than or equal to 120m/min; Acid strength in acid tank corresponding for the rear sour tank that do not break passed is adjusted to and is more than or equal to 120g/L; Acid liquor temperature is adjusted to 77 ~ 83 DEG C, and pickling speed is adjusted to 80 ~ 100m/min.
5. pickling unit according to claim 3 acid tank break after production method, it is characterized in that, be with steel successively through three acid tanks during pickling, for the band steel that special steel is made, acid strength in acid tank corresponding for the sour tank that do not break first passed is adjusted to 40 ~ 80g/L, acid liquor temperature is adjusted to 82 ~ 88 DEG C, is adjusted to by pickling speed and is less than or equal to 120m/min; Acid strength in acid tank corresponding for the rear sour tank that do not break passed is adjusted to and is more than or equal to 140g/L; Acid liquor temperature is adjusted to 77 ~ 83 DEG C, and pickling speed is adjusted to 60 ~ 90m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699359.2A CN104372357B (en) | 2014-11-27 | 2014-11-27 | Pickling unit acid tank rupture after production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410699359.2A CN104372357B (en) | 2014-11-27 | 2014-11-27 | Pickling unit acid tank rupture after production method |
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| Publication Number | Publication Date |
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| CN104372357A true CN104372357A (en) | 2015-02-25 |
| CN104372357B CN104372357B (en) | 2016-09-21 |
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| CN201410699359.2A Expired - Fee Related CN104372357B (en) | 2014-11-27 | 2014-11-27 | Pickling unit acid tank rupture after production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105648461A (en) * | 2016-03-07 | 2016-06-08 | 首钢京唐钢铁联合有限责任公司 | Acid leakage treatment system and method for acid troughs and acid tanks in cold rolling and acid rolling unit |
Citations (5)
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| JPH1119709A (en) * | 1997-07-03 | 1999-01-26 | Nkk Corp | Pickling device of steel sheet and pickling method and hot-dipping method of steel sheet |
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| CN101665946A (en) * | 2008-09-01 | 2010-03-10 | 鞍钢股份有限公司 | Device and method for controlling cold-rolling steel strip pickling turbulence |
| US20110023916A1 (en) * | 2009-07-29 | 2011-02-03 | Siemens Industry, Inc. | Pickle line assembly with inclined expansion seal |
| KR20130141154A (en) * | 2012-06-15 | 2013-12-26 | 주식회사 포스코 | Sensing system for leaking of pickling solution |
-
2014
- 2014-11-27 CN CN201410699359.2A patent/CN104372357B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1119709A (en) * | 1997-07-03 | 1999-01-26 | Nkk Corp | Pickling device of steel sheet and pickling method and hot-dipping method of steel sheet |
| CN101096766A (en) * | 2006-06-30 | 2008-01-02 | 宝山钢铁股份有限公司 | Silicon steel sulfuric acid refining system cleaning process |
| CN101665946A (en) * | 2008-09-01 | 2010-03-10 | 鞍钢股份有限公司 | Device and method for controlling cold-rolling steel strip pickling turbulence |
| US20110023916A1 (en) * | 2009-07-29 | 2011-02-03 | Siemens Industry, Inc. | Pickle line assembly with inclined expansion seal |
| KR20130141154A (en) * | 2012-06-15 | 2013-12-26 | 주식회사 포스코 | Sensing system for leaking of pickling solution |
Non-Patent Citations (1)
| Title |
|---|
| 潘韶慧 等: ""酸洗-酸再生工序工艺协调控制优化"", 《轧钢》, vol. 27, no. 3, 30 June 2010 (2010-06-30), pages 41 - 45 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105648461A (en) * | 2016-03-07 | 2016-06-08 | 首钢京唐钢铁联合有限责任公司 | Acid leakage treatment system and method for acid troughs and acid tanks in cold rolling and acid rolling unit |
| CN105648461B (en) * | 2016-03-07 | 2018-06-22 | 首钢京唐钢铁联合有限责任公司 | The leakage acid processing system and method for acid tank and sour tank in a kind of cold rolling sour rolling mill |
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| CN104372357B (en) | 2016-09-21 |
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