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Rinsing system and rinsing method for cold-rolled strip steel pickling

A steel pickling and rinsing technology, which is applied in the field of cold-rolled strip pickling rinsing systems, can solve the problems of increasing the number of equipment, maintenance workload, and increasing floor space, so as to reduce usage, reduce carry-out, and free The effect of acid content reduction

Active Publication Date: 2021-07-02
BENGANG STEEL PLATES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current strip steel rinsing is the strip acid outlet tank, which enters multiple rinsing tanks in turn, and a pair of squeeze rollers are arranged on both sides of each rinse tank, so there are five pairs of squeeze rollers in the four rinse tanks. After passing through the squeeze roller, the amount of liquid carried on the surface is 20mg / m 2 up to 300mg / m 2 It is closely related to the working state of the five pairs of squeeze rollers. The greater the amount of liquid carried on the surface, the greater the amount of water needed for rinsing, and the more stages of rinsing (the number of rinsing tanks), the greater the amount of water needed for rinsing. Small size and too many rinsing tanks will not only increase the floor area, but also increase the number of equipment and maintenance workload. At present, pickling units generally use 4-level (tank) rinsing

Method used

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  • Rinsing system and rinsing method for cold-rolled strip steel pickling
  • Rinsing system and rinsing method for cold-rolled strip steel pickling
  • Rinsing system and rinsing method for cold-rolled strip steel pickling

Examples

Experimental program
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Effect test

Embodiment 1

[0054] figure 1 A schematic diagram of a cold-rolled strip pickling rinsing system according to an embodiment of the present invention is shown.

[0055] Such as figure 1 As shown, this embodiment provides a rinsing system for pickling cold-rolled steel strips. The rinsing system includes a first rinsing tank 1, a second rinsing tank 2, a third rinsing tank 3 and a fourth rinsing tank arranged adjacently in sequence. 4. No. 1 squeeze roller 5 and No. 5 squeeze roller 9 are installed at both ends of the four rinsing tanks, and No. 2 squeeze roller 6, No. 3 squeeze roller 7 and No. Dry roller 8, each rinsing tank is provided with a suction port, the rinsing tank is connected to the circulation pump through the suction port, the first rinsing tank 1, the second rinsing tank 2, the third rinsing tank 3 and the fourth rinsing tank 4 Respectively connect the first circulating pump 10, the second circulating pump 11, the third circulating pump 12 and the fourth circulating pump 13,...

Embodiment 2

[0096] image 3 A schematic flow chart of a cold-rolled strip pickling and rinsing method according to an embodiment of the present invention is shown.

[0097] Such as image 3 As shown, the present embodiment provides a kind of rinsing method of cold-rolled strip pickling, utilizes the rinsing system of cold-rolled strip pickling in embodiment 1 to carry out rinsing, and this rinsing method comprises the steps:

[0098] Step 1, rinse water is now provided in the first rinse tank, the second rinse tank, the third rinse tank and the fourth rinse tank;

[0099] Step 2, the strip passes through the No. 1 squeeze roll, the first rinse tank, the No. 2 squeeze roll, the second rinse tank, the No. 3 squeeze roll, the third rinse tank, the No. 4 squeeze roll, and the fourth rinse tank and No. 5 squeeze roller;

[0100] In step 3, the steel strip on each rinsing tank is cleaned twice through the three spray pipes connected to the rinsing water of this rinsing tank and the double sp...

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Abstract

The invention relates to a rinsing system and rinsing method for cold-rolled strip steel pickling. The rinsing system comprises a desalted water tank communicating with a fourth double-spray pipe, wherein a fourth circulating pump communicates with a fourth three-spray pipe through a fourth pipeline and communicates with a third double-spray pipe through a fourth branch pipeline; a third circulating pump communicates with a third three-spray pipe through a third pipeline and communicates with a second double-spray pipe through a third branch pipeline; a second circulating pump communicates with a second three-spray pipe through a second pipeline and communicates with a first double-spray pipe through a second branch pipeline; a first circulating pump communicates with a first three-spray pipe through a first pipeline and communicates with a flushing water tank through a first branch pipeline; a sixth circulating pump is arranged between the flushing water tank and a deacidification and regeneration room; and the heights of separating walls between every two adjacent rinsing tanks are the same. According to the rinsing system and the rinsing method, the number of stages of rinsing is increased, the use amount of rinsing water is reduced, digestion in an acid regeneration room is facilitated, and waste caused by excessive water discharge is avoided.

Description

technical field [0001] The invention relates to the technical field of strip rinsing, in particular to a rinsing system and a rinsing method for pickling cold-rolled strips. Background technique [0002] Cold-rolled strip pickling is to use hydrochloric acid to remove the surface oxide scale of the raw material (hot-rolled strip), and then rinse off the residual acid on the surface with desalinated water. [0003] The current strip steel rinsing is the strip acid outlet tank, which enters multiple rinsing tanks in turn, and a pair of squeeze rollers are arranged on both sides of each rinse tank, so there are five pairs of squeeze rollers in the four rinse tanks. After passing through the squeeze roller, the amount of liquid carried on the surface is 20mg / m 2 up to 300mg / m 2 It is closely related to the working state of the five pairs of squeeze rollers. The greater the amount of liquid carried on the surface, the greater the amount of water needed for rinsing, and the more...

Claims

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Application Information

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IPC IPC(8): C23G3/02
CPCC23G3/029
Inventor 张勇王金鹏吴长发王娜关立凯王明顺张大宇叶方军
Owner BENGANG STEEL PLATES
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