CN201076872Y

CN201076872Y - Device for removing emulsion residual on surface of cold rolling strip steel

Info

Publication number: CN201076872Y
Application number: CNU200720013429XU
Authority: CN
Inventors: 胡宏旭; 蔡恒君; 高毅; 许国林; 杨军荣
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2007-07-23
Filing date: 2007-07-23
Publication date: 2008-06-25
Anticipated expiration: 2017-07-23

Abstract

The utility model provides a device which is used to remove emulsion residual on the surface of cold rolling strip steel, which comprises a wind beam and wind mouths. The technical characteristics of the utility model lie in that the wind beam is designed into a V-shape, and the angle is controlled within 150-180 degrees, the wind mouth is arranged on the wind beam, the number of the wind mouth is decided by the width of a steel plate, and the angle between the wind mouth and the steel plate is controlled within 30-60 degrees. The device has reasonable structure and favorable purging effect, and wind which is blown by the device can form a wind curtain on the surface of the steel plate. The unplanned product rate can be controlled within 0.08% which is caused by the emulsion residual through applying the utility model, thereby increasing economic benefits as the same time improving the quality of the product surface. The utility model not only can be used individually, but also can be matched with a straight strap type wind beam.

Description

A kind of residual device of cold-strip steel surface emulsion of removing

Technical field

The utility model belongs to technical field of steel rolling, particularly a kind ofly can remove the residual device of cold-strip steel surface emulsion.

Background technology

In the cold-strip steel technical field, roll the back surface of steel plate and exist the residual difficult problem of emulsion always at present.The residual device of existing removing emulsion generally is to be made of single, double row's vertical bar type wind beam and tuyere.Its weak point is: because the wind beam is the vertical bar type, being arranged on the horizontal line of tuyere so overlapping easily between the wind-force that each tuyere is jetted, and the phase mutual interference, is difficult to form air curtain, and it is very undesirable to purge effect.Especially reach 700m/min when above when the muzzle velocity of milling train, it is big more that the high more tuyere of speed purges scope, and the mutual interference of tuyere winding-up phase is also just big more.Therefore, utilize the existing post-purge device that rolls to be difficult to surface of steel plate is thoroughly purged, cause rolling emulsion to residue in the finished product surface of steel plate, after several days defectives such as chemical reaction, appearance point, block corrosion will take place, have a strong impact on the surface quality of steel plate.Particularly cold rolling back is for zinc-plated substrate, if the surface exists emulsion residual and formed corrosion, reveals the iron defective carrying out will causing when zinc-plated, just means for galvanizing production and will cause by waste product unplanned.Caused nearly 500 tons of steel plate off quality because of emulsion is residual in average every month according to statistics, the economic loss that causes thus is very serious.

Summary of the invention

In view of the technical problem of above-mentioned existence, the purpose of this utility model is in order to reduce the corrosion defective of surface of steel plate, improves finished product steel plate qualification rate and has developed and a kind ofly can thoroughly remove the residual device of cold-strip steel surface emulsion.

In order to realize the purpose of this utility model, design a kind of blow device that is different from traditional structure, be to constitute by wind beam and tuyere.The major technique feature is: the compound mode that adopts vertical bar type wind beam and V-shape wind beam to cooperatively interact, and Jiang Fengliang is designed to V-shape, and angle is controlled between 150 °～180 °, and best angle is 160 °; The wind beam is provided with tuyere, the width of its number basis steel sheet and deciding, and the angle between tuyere and the steel plate is controlled between 30 °～60 ° degree.This device is because cooperatively interacting of two best angles makes the wind-force that of jetting can form air curtain on steel plate, and the residual thorough purging of emulsion is clean, to guarantee the surface quality of finished product steel plate.It both can use separately, also can be used with vertical bar mode wind beam.

The utility model is compared with prior art has following advantage:

1. apparatus structure is reasonable in design, and the cost lattice are cheap, is convenient to promote the use of;

2. purge respond well, can will be controlled in 0.08% by the residual unplanned product rate that causes of emulsion;

3. the minimizing waste product improves the quality of products, remarkable in economical benefits.

Description of drawings

Fig. 1 is a plan structure schematic diagram of the present utility model

Fig. 2 is the online combination schematic diagram of the utility model

1 wind beam among the figure, 2 tuyeres, 3 blast main roads, 4 frames, the 5 anti-guide plates that twine.

The utility model mainly is made of wind beam 1 and tuyere 2. In blast main road 3 single row or multiple rows V is set Font wind beam 1, angle are controlled at greater than 150 °, less than 180 °; Its angle control is very crucial, if the angle Spend too littlely, can cause backwash when high-speed rolling, residual emulsion forms pittingpiston; If angle is too big, again Can form air curtain and disturb poor effect; Therefore, determine that the target optimum value is 160 °. Be provided with on the wind beam 1 Tuyere 2, the width of its number basis steel sheet and deciding, the angle between tuyere 2 and the steel plate be controlled at 30 °～Between 60 °.

The specific embodiment

In conjunction with the accompanying drawings and embodiments the utility model is described in detail:

As shown in Figure 1, the compound mode that the utility model adopts vertical bar type wind beam to match with V-shape wind beam, promptly first row adopts vertical bar type wind beam, and second row and the 3rd row all adopt V-shape wind beam, and angle is 160 °.Online compound mode is installed in the exit of finish to gauge frame 4 with this device as shown in Figure 2, steel plate be respectively arranged with three up and down, next air draft beam 1, the first row is the vertical bar type, and 8 tuyeres 2 are set; The second air draft beam places the anti-below that twines guide plate 5 in the finish to gauge frame 4, and symmetrical expression wind beam 1 up and down is set respectively, and promptly top is V-shape, and 12 tuyeres 2 are set; Be the vertical bar type below, 8 tuyeres 2 are set; The 3rd row is provided with 12 tuyeres 2 for V-shape wind beam 1; In this device, the angle between tuyere 2 and the steel plate all is controlled at 30 °.

Result of the test shows that vertical bar type wind beam is adopted in this device front, the compound mode that the back adopts V-shape wind beam to cooperatively interact, and the purging effect is the most desirable.Promptly first row is vertical bar type wind beam, and the angle between tuyere 2 and the steel plate is controlled at 60 °; Second row and the 3rd row are V-shape wind beam, and the angle between tuyere 2 and the steel plate all is controlled at 30 °; The effect of combined crosswise is like this, and first row blows big face earlier, and second row carries out prepurge, and the 3rd row thoroughly purifies.

The utility model is in 2130 cold rolling unit trial runs, when maximum mill speed reaches 1200m/min, visual emulsion remaining trace does not appear in surface of steel plate yet, proves that the wind-force that tuyere sprayed of being arranged by V-shape wind beam can form air curtain, has the residual emulsion effect of good cleaning.This unit was produced 5375 tons of chill panels in average month, use the utility model, can will be controlled in 0.08% by the residual unplanned product rate that causes of emulsion, reduced in every month owing to 430 tons of the residual unplanned finished steel amounts that causes of emulsion, per tonly press 500 yuan of calculating, a year wound economic benefit reaches more than 260 ten thousand yuan.

Claims

1. removing the residual device of cold-strip steel surface emulsion for one kind, is to be made of wind beam and tuyere; It is characterized in that: the compound mode that adopts vertical bar type wind beam and V-shape wind beam to cooperatively interact, wind beam (1) is designed to V-shape, and angle is controlled between 150 °～180 °; The wind beam is provided with tuyere (2), and the angle between tuyere (2) and the steel plate is controlled between 30 °～60 °.

2. the residual device of removal cold-strip steel surface emulsion according to claim 1, it is characterized in that: the angle of V-shape wind beam (1) is 160 °.

3. the residual device of removal cold-strip steel surface emulsion according to claim 1, it is characterized in that: the compound mode that adopts vertical bar type wind beam and V-shape wind beam to cooperatively interact, promptly first row is vertical bar type wind beam (1), and the angle between tuyere (2) and the steel plate is controlled at 60 °; Second row and the 3rd row are V-shape wind beam (1), and the angle between tuyere (2) and the steel plate all is controlled at 30 °.