阅读说明：本技术 一种电镀锡阳极电流的控制方法及装置 (method and device for controlling electrotinning anode current ) 是由 王爱红 胡建军 孙宇 王振文 吴明辉 杜国峰 姚艳茹 李文婷 段宗灿 孙凤意 张 于 2019-09-05 设计创作，主要内容包括：本发明涉及一种电镀锡阳极电流的控制方法及装置,该方法包括：根据带钢镀锡层的厚度,确定需投入使用的带钢上表面的第一锡阳极的第一排数和需投入使用的所述带钢下表面的第二锡阳极的第二排数；为第一排数的第一锡阳极和第二排数的第二锡阳极通正常电流,为剩余的锡阳极均通保护电流；在电镀槽内存在电势差的两排锡阳极的通电时长超过预设时长时,对存在电势差的两排锡阳极中的一排或两排锡阳极的通入电流进行调整,其他排锡阳极相应调整,以使得原有存在电势差的两排锡阳极经过调整之后的电势差方向变为反向或者不存在电势差,同时,确保需投入使用的第一锡阳极的第一数量和投入使用的第二锡阳极的第二数量不变,进而避免锡阳极的过渡消耗。(The invention relates to a method and a device for controlling the anode current of electrotinning, wherein the method comprises the following steps: determining the first row number of first tin anodes on the upper surface of the strip steel to be put into use and the second row number of second tin anodes on the lower surface of the strip steel to be put into use according to the thickness of a tin coating of the strip steel; normal current is conducted on the first tin anodes in the first row number and the second tin anodes in the second row number, and protection current is conducted on the rest tin anodes; the method comprises the steps that when the electrifying duration of two rows of tin anodes with potential differences in an electroplating bath exceeds the preset duration, the current introduced into one or two rows of tin anodes in the two rows of tin anodes with the potential differences is adjusted, and the other rows of tin anodes are correspondingly adjusted, so that the potential difference direction of the two rows of tin anodes with the potential differences is changed into the reverse direction or the potential difference does not exist, meanwhile, the first quantity of first tin anodes needing to be used and the second quantity of second tin anodes needing to be used are ensured to be unchanged, and the transitional consumption of the tin anodes is avoided.)

1. The utility model provides a control method of electrotinning anode current, is applied to the electroplating device who contains a plurality of plating baths, all is provided with two rows of tin anodes in every plating bath, a plurality of plating baths are arranged and are placed, and belted steel convolutes and passes two rows of tin anodes in every plating bath and electroplates, its characterized in that includes:

determining the first row number of first tin anodes on the upper surface of the strip steel to be put into use and the second row number of second tin anodes on the lower surface of the strip steel to be put into use according to the thickness of the tin coating of the strip steel;

Based on the first row number of the first tin anodes and the second row number of the second tin anodes which need to be put into use, normal current is conducted on the first tin anodes in the first row number and the second tin anodes in the second row number, and protection current is conducted on the rest tin anodes;

judging whether the electrifying time of the two rows of tin anodes with potential difference in each electroplating bath exceeds a preset time;

When the preset time length is exceeded, the current introduced into one or two rows of tin anodes in the two rows of tin anodes with potential difference is adjusted, and the other rows of tin anodes are correspondingly adjusted, so that the direction of the potential difference of the two rows of tin anodes with potential difference is changed into reverse or no potential difference after the two rows of tin anodes with potential difference are adjusted, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

2. The method according to claim 1, wherein the step of adjusting the current applied to one or both of the two rows of tin anodes having a potential difference therebetween when the predetermined time duration is exceeded comprises:

when the preset time length is exceeded, the current passing through one or two rows of tin anodes in the two rows of tin anodes which are used and have potential differences is adjusted to be protective current from normal current or from protective current to normal current, the current passing through one or two rows of tin anodes in the other two rows of tin anodes which are used is correspondingly adjusted, so that the direction of the potential differences of the two rows of tin anodes which have the potential differences is changed into reverse or no potential differences after the two rows of tin anodes are adjusted, and meanwhile, the first quantity of the first tin anodes which need to be used and the second quantity of the second tin anodes which are used are unchanged are ensured; or

when the preset time length is exceeded, the current passing through the two rows of tin anodes with potential difference in use is adjusted from normal current to pass through protection current, correspondingly, the tin anodes not in use are put into use, so that the direction of the potential difference of the two rows of tin anodes with potential difference in existence is changed into reverse direction or no potential difference exists after the adjustment, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

3. The method according to claim 1, wherein the step of applying normal current to the first tin anodes in the first row number and the second tin anodes in the second row number and applying protection current to the remaining tin anodes based on the first row number of the first tin anodes and the second row number of the second tin anodes to be put into use comprises:

if first tin positive pole corresponds the tinplate layer thickness of belted steel upper surface is first thickness, the second tin positive pole corresponds the tinplate layer thickness of belted steel lower surface is the second thickness, when first thickness is greater than the second thickness, first row number is greater than the second row number, based on need put into use the first row number of first tin positive pole with the second row number of second tin positive pole, do first normal current is led to first tin positive pole of first row number, do second normal current is led to second tin positive pole of second row number, for remaining tin positive pole is all led to protective current, first normal current is greater than second normal current.

4. The method of claim 3, wherein the first normal current is 2000-3000A, the second normal current is 1500-2000A, and the protection current is 50-200A.

5. The method according to claim 1 or 2, wherein the predetermined period of time is 4 to 8 hours.

6. The method of claim 1, further comprising:

and setting the distance between the outermost tin anode and the adjacent tin anode in each row of tin anodes to be not more than 1.5 times of the preset distance, wherein the preset distance is the average distance of the tin anodes in the row.

7. the utility model provides a control device of electrotinning anode current, is applied to a plurality of plating baths, all is provided with two rows of tin electrodes in every plating bath, and a plurality of plating baths are arranged and are placed, wait the post to wind around passing, two rows of tin anodes in each plating bath electroplate, its characterized in that, the device includes:

The determining module is used for determining a first number of first tin anodes on the upper surface of the strip steel to be put into use and a second number of second tin anodes on the lower surface of the strip steel to be put into use according to the thickness of the tin coating of the strip steel;

The current control module is used for enabling normal current to flow through the first tin anodes in the first row number and the second tin anodes in the second row number and enabling protection current to flow through the rest tin anodes based on the first row number of the first tin anodes and the second row number of the second tin anodes which need to be put into use;

The judgment module is used for judging whether the electrifying time of the two rows of tin anodes with potential difference in each electroplating bath exceeds the preset time;

And the adjustment control module is used for adjusting the current introduced into one or two rows of tin anodes in the two rows of tin anodes with potential difference between the two rows of tin anodes when the preset time length is exceeded, so that the direction of the potential difference between the two rows of tin anodes with potential difference is changed into reverse or no potential difference after adjustment, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

8. The apparatus of claim 7, wherein the adjustment control module specifically comprises:

the first adjusting unit is used for adjusting the current passing through one or two rows of tin anodes in the two rows of tin anodes with potential difference therebetween to be protective current or normal current from normal current, so that the direction of the potential difference of the two rows of tin anodes with potential difference is changed into reverse or no potential difference after adjustment, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged; or

And the second adjusting unit is used for enabling the two rows of tin anodes with potential difference therebetween to be electrified with protective current, correspondingly, the tin anodes which are not put into use are put into use, so that the direction of the potential difference between the two rows of tin anodes with potential difference therebetween after adjustment is changed into reverse direction or no potential difference exists, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

9. The apparatus of claim 7, wherein the current control module is specifically configured to:

if first tin positive pole corresponds the tinplate layer thickness of belted steel upper surface is first thickness, the second tin positive pole corresponds the tinplate layer thickness of belted steel lower surface is the second thickness, when first thickness is greater than the second thickness, first row number is greater than the second row number is used for based on need put into use the first row number of first tin positive pole with the second row number of second tin positive pole, do first normal current is led to the first tin positive pole of first row number, do second normal current is led to the second tin positive pole of second row number, all leads to protective current for remaining tin positive pole, first normal current is greater than the second normal current.

10. The apparatus of claim 7, wherein the predetermined period of time is 4 to 8 hours.

Technical Field

the invention relates to the technical field of tin plates, in particular to a control method of electrotinning current.

Background

The ultrathin tin plate for food packaging is prepared by adopting a soluble tin electroplating process, the adopted electroplating solution has good environmental protection property and high utilization rate of tin anodes, the tin anodes are formed by melting and pouring a casting room of the anodes beside a machine, each anode is in a long strip shape and has the weight of about 30kg, and generally 9 anodes are vertically suspended on each row of anode beams.

When a tinning unit produces orders of different thick tin layers of more than 5.6g/m ², because the anodes on the two sides of the strip steel have potential differences for a long time, tin pricks easily grow on the anodes with low potential, so that the anodes with low potential are excessively consumed, the quality of a tinning process is influenced in a serious situation, and the tinning unit can possibly be subjected to long-time fault shutdown.

Therefore, how to improve the excessive consumption of the low-potential anode so as to ensure the quality of the tin plating process is a technical problem to be solved urgently at present.

disclosure of Invention

in view of the above problems, the present invention has been made to provide a method and apparatus for controlling an anode current of electrolytic tin plating which overcome the above problems or at least partially solve the above problems.

On one hand, the embodiment of the invention provides a method for controlling the current of an electroplated tin anode, which is applied to electroplating equipment comprising a plurality of electroplating baths, wherein two rows of tin anodes are arranged in each electroplating bath, the plurality of electroplating baths are arranged, and strip steel is wound and passes through the two rows of tin anodes in each electroplating bath for electroplating, and the method comprises the following steps:

determining the first row number of first tin anodes on the upper surface of the strip steel to be put into use and the second row number of second tin anodes on the lower surface of the strip steel to be put into use according to the thickness of the tin coating of the strip steel;

based on the first row number of the first tin anodes and the second row number of the second tin anodes which need to be put into use, normal current is conducted on the first tin anodes in the first row number and the second tin anodes in the second row number, and protection current is conducted on the rest tin anodes;

Judging whether the electrifying time of the two rows of tin anodes with potential difference in each electroplating bath exceeds a preset time;

When the preset time length is exceeded, the current introduced into one or two rows of tin anodes in the two rows of tin anodes with potential difference is adjusted, and the other rows of tin anodes are correspondingly adjusted, so that the direction of the potential difference of the two rows of tin anodes with potential difference is changed into reverse or no potential difference after the two rows of tin anodes with potential difference are adjusted, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

Further, when the preset time length is exceeded, the current introduced into one or two rows of tin anodes with potential difference therebetween is adjusted, and the method specifically includes:

When the preset time length is exceeded, the current passing through one or two rows of tin anodes in the two rows of tin anodes which are used and have potential differences is adjusted to be protective current from normal current or from protective current to normal current, the current passing through one or two rows of tin anodes in the other two rows of tin anodes which are used is correspondingly adjusted, so that the direction of the potential differences of the two rows of tin anodes which have the potential differences is changed into reverse or no potential differences after the two rows of tin anodes are adjusted, and meanwhile, the first quantity of the first tin anodes which need to be used and the second quantity of the second tin anodes which are used are unchanged are ensured; or

When the preset time length is exceeded, the current passing through the two rows of tin anodes with potential difference in use is adjusted from normal current to pass through protection current, correspondingly, the tin anodes not in use are put into use, so that the direction of the potential difference of the two rows of tin anodes with potential difference in existence is changed into reverse direction or no potential difference exists after the adjustment, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

Further, the step of applying normal current to the first tin anodes in the first row number and the second tin anodes in the second row number based on the first row number of the first tin anodes and the second row number of the second tin anodes to be put into use, and applying protection current to the remaining tin anodes includes:

If first tin positive pole corresponds the tinplate layer thickness of belted steel upper surface is first thickness, the second tin positive pole corresponds the tinplate layer thickness of belted steel lower surface is the second thickness, when first thickness is greater than the second thickness, first row number is greater than the second row number, based on need put into use the first row number of first tin positive pole with the second row number of second tin positive pole, do first normal current is led to first tin positive pole of first row number, do second normal current is led to second tin positive pole of second row number, for remaining tin positive pole is all led to protective current, first normal current is greater than second normal current.

Further, the first normal current is 2000-3000A, the second normal current is 1500-2000A, and the protection current is 50-200A.

further, the preset time is 4-8 hours.

Further, still include:

And setting the distance between the outermost tin anode and the adjacent tin anode in each row of tin anodes to be not more than 1.5 times of the preset distance, wherein the preset distance is the average distance of the tin anodes in the row.

on the other hand, the embodiment of the invention also provides a control device for the current of the tin-electroplated anode, which is applied to a plurality of electroplating baths, wherein two rows of tin electrodes are arranged in each electroplating bath, the plurality of electroplating baths are arranged and arranged, and the two rows of tin anodes in the plurality of electroplating baths are electroplated after being wound around, and the device comprises:

The determining module is used for determining a first number of first tin anodes on the upper surface of the strip steel to be put into use and a second number of second tin anodes on the lower surface of the strip steel to be put into use according to the thickness of the tin coating of the strip steel;

The current control module is used for enabling normal current to flow through the first tin anodes in the first row number and the second tin anodes in the second row number and enabling protection current to flow through the rest tin anodes based on the first row number of the first tin anodes and the second row number of the second tin anodes which need to be put into use;

The judgment module is used for judging whether the electrifying time of the two rows of tin anodes with potential difference in each electroplating bath exceeds the preset time;

And the adjustment control module is used for adjusting the current introduced into one or two rows of tin anodes in the two rows of tin anodes with potential difference between the two rows of tin anodes when the preset time length is exceeded, so that the direction of the potential difference between the two rows of tin anodes with potential difference is changed into reverse or no potential difference after adjustment, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

Further, the adjusting control module specifically includes:

The first adjusting unit is used for adjusting the current passing through one or two rows of tin anodes in the two rows of tin anodes with potential difference therebetween to be protective current or normal current from normal current, so that the direction of the potential difference of the two rows of tin anodes with potential difference is changed into reverse or no potential difference after adjustment, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged; or

And the second adjusting unit is used for enabling the two rows of tin anodes with potential difference therebetween to be electrified with protective current, correspondingly, the tin anodes which are not put into use are put into use, so that the direction of the potential difference between the two rows of tin anodes with potential difference therebetween after adjustment is changed into reverse direction or no potential difference exists, and meanwhile, the first quantity of the first tin anodes needing to be put into use and the second quantity of the second tin anodes needing to be put into use are unchanged.

further, the current control module is specifically configured to:

if first tin positive pole corresponds the tinplate layer thickness of belted steel upper surface is first thickness, the second tin positive pole corresponds the tinplate layer thickness of belted steel lower surface is the second thickness, when first thickness is greater than the second thickness, first row number is greater than the second row number is used for based on need put into use the first row number of first tin positive pole with the second row number of second tin positive pole, do first normal current is led to the first tin positive pole of first row number, do second normal current is led to the second tin positive pole of second row number, all leads to protective current for remaining tin positive pole, first normal current is greater than the second normal current.

further, the preset time is 4-8 hours.

one or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

The invention provides a control method of electrotinning anode current, which is applied to electroplating equipment comprising a plurality of electroplating baths, wherein two rows of tin electrodes are arranged in each electroplating bath, the plurality of electroplating baths are arranged, and strip steel passes through the two rows of tin electrodes of each electroplating bath in a rotating manner, firstly, according to the thickness of a tin coating of the strip steel, a first number of first tin anodes on the upper surface of the strip steel to be put into use and a second number of second tin anodes on the lower surface of the strip steel to be put into use are determined, then, based on the first row number and the second row number, normal current is conducted to the first tin anodes in the first row number, normal current is conducted to the second tin anodes in the second row number, protective current is conducted to the rest tin anodes, whether the conduction time length of the two rows of tin anodes with potential difference in each electroplating bath exceeds a preset time length or not is judged, and the conduction current of one or two rows of tin anodes with potential difference is adjusted when the conduction time length exceeds the preset time length, so that the original potential difference direction that has two rows of tin anodes of potential difference after the adjustment becomes reverse or does not have the potential difference, simultaneously, it is unchangeable to ensure the first quantity of the first tin anode that needs to put into use and the second quantity of the second tin anode that puts into use, and then can avoid when there are two tin electrodes of potential difference for a long time, cause "back plating" on the tin anode surface of low potential easily to produce the phenomenon of tin thorn, avoid the transition consumption of tin anode.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic view showing the electroplating of a strip steel being convoluted through each of a plurality of electroplating baths in an embodiment of the present invention;

FIG. 2 is a flow chart showing the steps of a method for controlling an electrolytic tin plating anode current according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing that the first 4 rows of first tin anodes corresponding to the upper surface of the strip steel are electrified with normal current, and the first 2 rows of second tin anodes corresponding to the lower surface of the strip steel are electrified with normal current in the embodiment of the invention;

FIG. 4 is a schematic diagram showing that the first 4 rows of first tin anodes corresponding to the upper surface of the strip steel are electrified with normal current, and the first 2 rows of second tin anodes corresponding to the lower surface of the strip steel are electrified with normal current, so as to number the 8 rows of tin anodes in the embodiment of the invention;

FIG. 5 is a schematic diagram showing the current flowing through the tin anode put into use after being adjusted by the first adjustment rule in the embodiment of the present invention;

FIG. 6 is a schematic diagram showing the current flowing through the tin anode put into use after being adjusted by the second adjustment rule in the embodiment of the present invention;

FIG. 7 is a schematic diagram showing the current flowing through the tin anode put into use after another adjustment manner according to the second adjustment rule in the embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating the adjustment of the spacing between the tin anodes in each row according to the embodiment of the present invention;

FIG. 9 is a schematic view showing the configuration of a control apparatus for an electrolytic tinning anode current in the embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

as shown in FIG. 1, in the example of the present invention, a strip A was plated at a speed of 400m/s through two rows of tin electrodes B in each of a plurality of plating tanks. In the electroplating process, normal current is introduced to one row of tin anodes to enable the tin anodes to generate oxidation-reduction reaction and become tin ions, and then the tin ions are electroplated on the strip steel A of the cathode opposite to the tin anodes B, so that a tin coating is formed on the strip steel A. The plurality of plating baths may include a total of 36 rows of tin anodes, although there may be more.

the strip tin coating can be a differential thick tin coating, for example, 11.2/2.8g/m ², namely, the thicknesses of the tin coatings on the upper surface and the lower surface are not equal, the energizing states of the two rows of tin anodes in each electroplating bath are controlled, for example, the two rows of tin anodes in each electroplating bath are provided with a first quantity of normal current corresponding to the tin anodes on the thicker tin coating layer surface of the strip steel, and the second quantity of normal current corresponding to the tin anodes on the thinner tin coating layer surface of the strip steel, so that the first quantity is greater than the second quantity, and the differential thick tin coating is formed.