CN100415448C - Method of eliminating iron scale from surface of stainless steel - Google Patents
Method of eliminating iron scale from surface of stainless steel Download PDFInfo
- Publication number
- CN100415448C CN100415448C CNB2006100129520A CN200610012952A CN100415448C CN 100415448 C CN100415448 C CN 100415448C CN B2006100129520 A CNB2006100129520 A CN B2006100129520A CN 200610012952 A CN200610012952 A CN 200610012952A CN 100415448 C CN100415448 C CN 100415448C
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- shot
- stainless steel
- blasting machine
- steel plate
- iron scale
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The elimination of iron scale on surface of stainless steel plate is completed with several shot blasting machines. The present invention features that SM150-type steel grits are filled into the material bin of the shot blasting machines and used in eliminating iron scale on surface of stainless steel plate. The present invention has sanding coefficient of 1.1-1.2, throwing head rotation speed of shot blasting machines of 1850-2000 rpm, annealing temperature of the hot rolled stainless steel plate of 1125-1140 deg.c, the brush roller pressure current in the pickling zone after elimination of 20-30 A, the washing water pressure not lower than 5Br and the technological speed of the hot rolled stainless steel plate of 60-67 m/min. Three shot blasting machines have separated thrown portions for high eliminating effect, and the present invention has low scale eliminating medium consumption, low cost and low surface roughness of the eliminated stainless steel plate.
Description
Technical field
The present invention relates to a kind of method of removing iron scale from surface of stainless steel.
Background technology
The stainless-steel cold-rolling raw material is in course of hot rolling, surface of steel plate produces fine and close oxide skin, in acid cleaning process, having a strong impact on clean effect, the method of removing iron scale from surface of stainless steel now is a shot descaling method, cause the stock chart surface oxidized skin residual easily, roughness increase etc. and influence the finished surface quality, the weak effect of descaling, raw material surface roughness value after the pickling reaches more than the 4 μ m, the loss per ton steel of shot is up to 5Kg, because the cause for quality of shot, it is unclean to cause the stock chart iron scale from surface to beat simultaneously, and the shot dust is big, increase dedusting pressure, further had influence on the surface quality of raw material.
Summary of the invention
In order to overcome the existing above-mentioned deficiency of removing the iron scale from surface of stainless steel method, the invention provides the low iron scale from surface of stainless steel method of raw material surface roughness value after a kind of de-scaling.
Design of the present invention is to adopt steel sand to replace the medium of shot as the surface de-scaling of stainless-steel cold-rolling raw material.
The method of this removing iron scale from surface of stainless steel be some shot-blasting machines successively continuous operation remove continuously, it is characterized in that: the steel sand of SM150 model is added to the feed bin of shot-blasting machine, replaces the iron scale of shot as the media erase stainless steel hot-rolling surface of steel plate of de-scaling with the SM150 steel sand.The ramming coefficient is 1.1～1.2; The ramming head rotating speed of shot-blasting machine is that per minute 1850～2000 changes; The annealing temperature of stainless steel hot rolled steel plate should be at 1125 ℃-1140 ℃; The brush roll pressure to current of removing back pickling section scrubbing unit is 20A-30A, the pressure 〉=5Br of rinse water, and the process speed 60 of stainless steel hot rolled steel plate is to 67m/min.
In order to reach stable dedusting, guarantee that dust all blows away, improve steel sand and impact effect, reach the purpose of high-effective dust-removing cooling.This removing iron scale from surface of stainless steel method has been adjusted the filter suction amount of shot-blasting machine, makes the inlet flashboard opening degree of shot-blasting machine progressively increase to 70% by 20%, and blast is increased to 0.8Br, and increase shot-blasting machine mix the cold wind valve, the open degree of valve is reached 90%.
In running, be with the sand problem in order to solve stainless steel belt, cause steel sand to overflow feed bin, below the shot-blasting machine feed bin, be provided with a sand returning pipe, make the steel sand that overflows be back to down spiral.Solved band sand problem.
In order to guarantee the roughness on stainless steel belt surface, give full play to the effect that impacts of steel sand, orienting cover is adjusted, the ramming head of three shot-blasting machines all covers the upper and lower surface of stainless steel hot rolled steel plate according to certain angle, make the ramming head throwing of three shot-blasting machines beat the position separately, the ramming head throwing that is one of them shot-blasting machine is beaten the position towards a side, and the throwing of the ramming head of another shot-blasting machine is beaten the position towards opposite side, and the throwing of the ramming head of last shot-blasting machine is beaten the position towards the middle part.
This removing iron scale from surface of stainless steel method steel sand makes the consumption of de-scaling medium be reduced to below the 2Kg/t by 5Kg/t as the medium of stainless-steel cold-rolling raw material surface de-scaling; Roughness value by the stainless steel band surface after the de-scaling is reduced to R
a=4 μ m: the raw material that causes because of the clean reason of iron scale is come down to a lower group do not conform to rate significantly to be reduced to below 0.6%; Reduced product cost, the removing cost of stainless steel belt per ton has reduced by 18.084 yuan.
The specific embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is described, but the specific embodiment of the present invention is not limited to following embodiment.
What present embodiment was removed is the 0Cr18Ni9 steel band, present embodiment be three shot-blasting machines successively continuous operation remove continuously, the steel band after first removing is by second removing, at last again by the 3rd removing.
Add the SM150 steel sand in the feed bin of three shot-blasting machines, with the iron scale of SM150 steel sand removing stainless steel hot-rolling surface of steel plate, the ramming coefficient is 1.1～1.2; The ramming head rotating speed of shot-blasting machine is that per minute 1850～2000 changes; The annealing temperature of stainless steel hot rolled steel plate should be at 1130 ℃; The brush roll pressure to current of removing back pickling section scrubbing unit is 25A, the pressure 5-6Br of rinse water, the process speed 60m/min of stainless steel hot rolled steel plate.Start shot-blasting machine and remove the stainless steel hot rolled steel plate with the SM150 steel sand.The shot-blasting machine feed bin below of present embodiment has added a sand returning pipe, makes the steel sand that overflows be back to down spiral.The ramming head of three shot-blasting machines all covers the upper and lower surface of stainless steel hot rolled steel plate according to certain angle, make the ramming head throwing of three shot-blasting machines beat the position separately, the ramming head of first shot-blasting machine is thrown and is beaten the position towards a side, the throwing of the ramming head of second shot-blasting machine is beaten the position towards opposite side, and the throwing of the ramming head of the 3rd shot-blasting machine is beaten the position towards the middle part.
The 0Cr18Ni9 steel band is after three shot-blasting machines are removed the surface, and the surface roughness value of 0Cr18Ni9 steel band is by R
aDrop to R about 5 μ m
a4 μ m.
Claims (4)
1. remove the method for iron scale from surface of stainless steel, it be some shot-blasting machines successively continuous operation remove continuously, it is characterized in that: the steel sand of SM150 model is added to the feed bin of shot-blasting machine, as the iron scale of the media erase stainless steel hot-rolling surface of steel plate of de-scaling; The ramming coefficient is 1.1～1.2; The ramming head rotating speed of shot-blasting machine is that per minute 1850～2000 changes; The annealing temperature of stainless steel hot rolled steel plate is 1125 ℃-1140 ℃; The brush roll pressure to current of removing back pickling section scrubbing unit is 20A-30A, the pressure 〉=5Br of rinse water, and the process speed 60 of stainless steel hot rolled steel plate is to 67m/min.
2. the method for removing iron scale from surface of stainless steel according to claim 1, it is characterized in that: the filter suction amount of adjusting shot-blasting machine, make the inlet flashboard opening degree of shot-blasting machine progressively increase to 70% by 20%, blast is increased to 0.8Br, and increase shot-blasting machine mix the cold wind valve, the open degree of valve is reached 90%.
3. the method for removing iron scale from surface of stainless steel according to claim 2, it is characterized in that: the ramming head of three shot-blasting machines all covers the upper and lower surface of stainless steel hot rolled steel plate according to certain angle, make the ramming head throwing of three shot-blasting machines beat the position separately, the ramming head of one of them shot-blasting machine is thrown and is beaten the position towards a side, the throwing of the ramming head of another shot-blasting machine is beaten the position towards opposite side, and the throwing of the ramming head of last shot-blasting machine is beaten the position towards the middle part.
4. the method for removing iron scale from surface of stainless steel according to claim 3 is characterized in that: added a sand returning pipe below the shot-blasting machine feed bin, the steel sand that overflows is back to down spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100129520A CN100415448C (en) | 2006-07-14 | 2006-07-14 | Method of eliminating iron scale from surface of stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100129520A CN100415448C (en) | 2006-07-14 | 2006-07-14 | Method of eliminating iron scale from surface of stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1887530A CN1887530A (en) | 2007-01-03 |
| CN100415448C true CN100415448C (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100129520A Expired - Fee Related CN100415448C (en) | 2006-07-14 | 2006-07-14 | Method of eliminating iron scale from surface of stainless steel |
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| CN (1) | CN100415448C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009017701A1 (en) * | 2009-01-22 | 2010-07-29 | Sms Siemag Aktiengesellschaft | Method and apparatus for annealing and descaling stainless steel strip |
| CN107671736A (en) * | 2017-11-13 | 2018-02-09 | 江苏飞腾铸造机械有限公司 | One kind improves steel plate impeller blasting technique |
| CN109623672B (en) * | 2018-11-29 | 2021-04-06 | 上海丛麟环保科技股份有限公司 | Operation method of oil drum refurbishing pretreatment production line |
| CN110508630A (en) * | 2019-07-23 | 2019-11-29 | 常熟市长江不锈钢材料有限公司 | A kind of stainless steel belt surface oxide layer sweep-out method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2202012Y (en) * | 1994-07-03 | 1995-06-28 | 张光平 | Direct pressing and internal circulating sand sprayer |
| CN1122264A (en) * | 1994-07-07 | 1996-05-15 | 矿山机械和轧钢机械制造有限公司 | A process for the preparation of cold rolled stain less steel strips and metal strips, more particularly of titanium alloys |
| JPH09155435A (en) * | 1995-11-30 | 1997-06-17 | Kawasaki Steel Corp | Method and equipment for descaling steel by shot blasting |
| CN1226468A (en) * | 1998-01-22 | 1999-08-25 | 李国平 | Technology for spray coating fixed electric power installation on site |
| JP2002239627A (en) * | 2001-02-09 | 2002-08-27 | Sintokogio Ltd | Descaling method, descaling device and shot-blast device of wire |
| CN2517543Y (en) * | 2002-01-25 | 2002-10-23 | 北京福斯达高科技公司 | Combined derusting appts. by shot blasting |
-
2006
- 2006-07-14 CN CNB2006100129520A patent/CN100415448C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2202012Y (en) * | 1994-07-03 | 1995-06-28 | 张光平 | Direct pressing and internal circulating sand sprayer |
| CN1122264A (en) * | 1994-07-07 | 1996-05-15 | 矿山机械和轧钢机械制造有限公司 | A process for the preparation of cold rolled stain less steel strips and metal strips, more particularly of titanium alloys |
| JPH09155435A (en) * | 1995-11-30 | 1997-06-17 | Kawasaki Steel Corp | Method and equipment for descaling steel by shot blasting |
| CN1226468A (en) * | 1998-01-22 | 1999-08-25 | 李国平 | Technology for spray coating fixed electric power installation on site |
| JP2002239627A (en) * | 2001-02-09 | 2002-08-27 | Sintokogio Ltd | Descaling method, descaling device and shot-blast device of wire |
| CN2517543Y (en) * | 2002-01-25 | 2002-10-23 | 北京福斯达高科技公司 | Combined derusting appts. by shot blasting |
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| Publication number | Publication date |
|---|---|
| CN1887530A (en) | 2007-01-03 |
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| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANXI TAIGANG STAINLESS STEEL CO., LTD. Free format text: FORMER OWNER: TAIYUAN IRON AND STEEL (GROUP) CO LTD Effective date: 20070629 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20070629 Address after: 030003 No. 2 lawn street, Taiyuan, Shanxi Applicant after: Shanxi Taigang Stainless Steel Co., Ltd. Address before: 030003 No. 2, sharp lawn, Taiyuan City, Shanxi Province Applicant before: Taiyuan Iron & Steel (Group) Co., Ltd. |
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Granted publication date: 20080903 Termination date: 20160714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |