CN208995608U - Experimental device for simulating multistage turbulent pickling of strip steel - Google Patents

Abstract

The utility model provides an experimental device for simulating multi-stage turbulent pickling of strip steel. The device comprises a magnetic heating stirrer, a sample fixture, a pickling tank, a corrosion-resistant thermocouple and a rinsing tank; the pickling tank is placed in the magnetic stirrer. On the heating plate, the number of pickling tanks is determined according to the number of pickling stages; the rinsing tank is placed on the heating plate of the magnetic stirrer; the pickling tank and the rinsing tank are placed with corrosion-resistant thermocouples and corresponding magnetic stirrers. Magnet rotor. The utility model can make the acid liquid in the pickling tank flow and form a turbulent state by means of magnetic stirring, and can effectively simulate the turbulent pickling process of strip steel in the actual production process. At the same time, it is also possible to improve the pickling effect by changing the acid concentration, pickling and rinsing temperature, pickling stages, pickling time at each level, and acid flow rate. The equipment of the utility model has the advantages of low equipment cost, simple operation and strong adaptability, and the experimental results thereof have high guiding significance for actual production.

Description

An experimental device for simulating multi-stage turbulent pickling of strip steel

technical field

The utility model belongs to the field of strip steel pickling, in particular to an experimental device for simulating multi-stage turbulent pickling of strip steel.

Background technique

In the production of hot-rolled strip pickling, the method of shallow groove turbulent pickling is usually used, that is, the acid liquid is continuously sprayed to the strip steel from the nozzle in the pickling tank to form a turbulent state, so that the acid liquid and the strip can be fully contact to achieve the best pickling effect. The pickling line of iron and steel enterprises mostly adopts the method of multi-stage pickling, that is, the acid concentration increases step by step, which on the one hand can improve the pickling efficiency, significantly reduce the iron loss and acid consumption, and on the other hand, it is also conducive to the circulation of the acid solution regeneration. After pickling, there are rinsing, drying, oiling and other processes. After pickling, the hot-rolled strip has better surface quality, which can partially realize "replacing cooling with heat", which can significantly reduce the production cost of enterprises, and is widely used in automobile manufacturing and other fields. In the process of simulating the pickling of strip steel in the laboratory, the steel sample cut into small pieces is generally put into a beaker containing pickling solution for pickling. The acid solution is usually static, or stirred with a glass rod in order to Accelerate the pickling speed and achieve the effect of turbulent pickling. This pickling method takes a long time and has limited repeatability, which is seriously inconsistent with the actual production situation, and its experimental results have limited guiding effect on actual production.

Utility model content

The purpose of the utility model is to provide an experimental device for simulating the multi-stage turbulent pickling of strip steel, so as to solve the problem that the existing experimental device cannot effectively simulate the multi-stage turbulent pickling.

The purpose of this utility model is to realize through the following technical solutions:

An experimental device for simulating multi-stage turbulent pickling of strip steel, comprising a magnetic heating stirrer, a sample fixture, a pickling tank, a corrosion-resistant thermocouple and a rinsing tank; the pickling tank is placed on the heating plate of the magnetic heating stirrer, The number of pickling tanks is determined according to the number of pickling stages; the rinsing tank is placed on the heating plate of the magnetic heating stirrer; both the pickling tank and the rinsing tank are placed with corrosion-resistant thermocouples and magnet rotors corresponding to the magnetic heating stirrer.

Further, in the experimental device for simulating multi-stage turbulent pickling of strip steel, different concentrations of hydrochloric acid solutions are installed in the pickling tank, and the concentrations increase step by step.

Further, in the experimental device for simulating multi-stage turbulent pickling of strip steel, the volume of the hydrochloric acid solution in the pickling tank does not exceed 2/3 of the volume of the pickling tank.

Furthermore, in the experimental device for simulating multi-stage turbulent pickling of strip steel, the magnetic heating stirrer in the pickling tank is connected with a corrosion-resistant thermocouple, and the corrosion-resistant thermocouple controls the temperature of the hydrochloric acid solution at 80±20°C.

Further, in the experimental device for simulating multi-stage turbulent pickling of strip steel, the volume of deionized water in the rinsing tank does not exceed 2/3 of the volume of the rinsing tank.

Furthermore, in the experimental device for simulating multi-stage turbulent pickling of strip steel, the magnetic heating stirrer in the rinsing tank is connected with a corrosion-resistant thermocouple, and the corrosion-resistant thermocouple controls the temperature of deionized water at 50±20°C.

Further, the pickling tank and the rinsing tank in the experimental device for simulating multi-stage turbulent pickling of strip steel are made of acid-resistant and transparent materials.

Further, the six-unit magnetic heating stirrer has a program heating temperature control function and a bidirectional magnetic stirring function, and the stirring speed can be adjusted by a knob.

Preferably, the concentration of hydrochloric acid in the 1# pickling tank is 30～50g/L; the concentration of hydrochloric acid in the 2# pickling tank is 60～90g/L; the concentration of hydrochloric acid in the 3# pickling tank is 100～90g/L 120g/L; the concentration of hydrochloric acid in the 4# pickling tank is 140～160g/L.

Compared with the prior art, the present invention has at least the following beneficial effects:

The utility model can make the acid liquid in the pickling tank flow and form a turbulent state by means of magnetic stirring, and can effectively simulate the turbulent pickling process of strip steel in the actual production process. Adjust the flow rate of the acid solution; by controlling the temperature and concentration of the acid solution in the pickling tank and the number of pickling tanks, the multi-stage pickling of the strip can be simulated. The utility model has the advantages of low equipment cost, simple operation and strong adaptability, and has a good guiding effect on actual production.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Among them: 1-magnetic heating stirrer, 2-sample fixture, 3-pickling tank, 4-corrosion-resistant thermocouple, 5-magnet rotor, 6-rinsing tank, 7-temperature display, 8-speed adjustment knob, 9- Temperature setting, 10-power switch, 11-heating control switch, 12-magnetic stirring switch, 13-heating plate.

Detailed ways

In order to better understand the structure and use method of the device of the present invention, the following detailed description is given in conjunction with the accompanying drawings.

As shown in Figure 1, an experimental device for simulating multi-stage turbulent pickling of strip steel includes a magnetic heating stirrer 1, a sample holder 2, a pickling tank 3, a corrosion-resistant thermocouple 4 and a rinsing tank 6; 3 is placed on the heating plate 13 of the magnetic heating stirrer 1, and the number of pickling tanks 3 is determined according to the number of pickling stages; the rinsing tank 6 is placed on the heating plate 13 of the magnetic heating stirrer 1; Corrosion-resistant thermocouples 4 and magnet rotors 5 corresponding to the magnetic heating stirrer 1 are placed in the grooves 6 . The pickling tank 3 is filled with hydrochloric acid solutions of different concentrations, and the concentrations increase step by step. The volume of the hydrochloric acid solution in the pickling tank 3 does not exceed 2/3 of the volume of the pickling tank 3. The magnetic heating stirrer 1 in the pickling tank 3 is connected with a corrosion-resistant thermocouple 4, and the corrosion-resistant thermocouple 4 controls the temperature of the hydrochloric acid solution at 80±20°C. The volume of deionized water in the rinsing tank 6 does not exceed 2/3 of the volume of the rinsing tank 6 . The magnetic heating stirrer 1 in the rinsing tank 6 is connected with a corrosion-resistant thermocouple 4, and the corrosion-resistant thermocouple 4 controls the temperature of the deionized water at 50±20°C. The pickling tank 3 and the rinsing tank 6 are made of acid-resistant and transparent materials.

In the embodiment, four-stage pickling on site is simulated, four pickling tanks 3 are placed on the heating plate 13 in sequence, and two rinsing tanks 6 are placed on the heating plate 13 in sequence. The magnetic heating stirrer 1 is a six-unit magnetic heating stirrer. The corrosion-resistant thermocouple 4 connected to the magnetic heating agitator 1 is installed in the pickling tank 3 and the rinsing tank 6 to measure the liquid temperature in the tank in real time and feed it back to the six-unit magnetic heating. Agitator temperature control system. The temperature control system controls the heating power according to the temperature set by the system and the temperature fed back by the corrosion-resistant thermocouple 4 .

Before the test, pre-prepared hydrochloric acid solutions of different concentrations are installed in pickling tank 3. The concentration of hydrochloric acid in 1# pickling tank 3 is 30-50 g/L; the concentration of hydrochloric acid in 2# pickling tank 3 is 60-90 g/L. ; The concentration of hydrochloric acid in 3# pickling tank 3 is 100～120g/L; The concentration of hydrochloric acid in 4# pickling tank 3 is 140～160g/L. The rinsing tank 6 is equipped with deionized water; the liquid volume in the pickling tank 3 and the rinsing tank 6 does not exceed 2/3 of the volume of the tank body. The hot-rolled strip for the experiment was processed into small blocks of uniform specifications and clamped with a sample holder for use.

During the experiment, turn on the power switch 10 of the six-unit magnetic heating stirrer, set the temperature of each magnetic heating stirrer to the required value, then turn on the heating control switch 11, and turn the magnetic stirring switch 12 to bidirectional. When the temperature rises to the set temperature, control the sample holder 2 to completely immerse the sample in the hydrochloric acid solution of the 1# pickling tank, and use a stopwatch to time the time. After pickling for a specific time, take out the sample holder and immediately carry out the next level of pickling. , and so on. After completing the fourth-stage pickling in the 4# pickling tank 3, the samples and fixtures were put into the 1# and 2# rinsing tanks 6 in turn by the same method for two-stage rinsing. Hot air drying was performed, and the dried samples were left for observation and analysis. The utility model can improve the pickling effect by changing the factors such as acid concentration, pickling and rinsing temperature, pickling stages, pickling time of each level, magnetic stirring speed, etc. The experimental results have higher guiding significance for actual production. .

The above-mentioned embodiments only represent specific embodiments of the present invention, but should not be construed as limiting the scope of the present invention. Any changes made to the present invention by those skilled in the art under the inspiration of the inventive concept fall within the protection scope of the present invention.

Claims (7)

1. a kind of experimental provision for simulating strip multistage turbulence acid dip, which is characterized in that including magnetic heating stirrer (1), sample Product fixture (2), descaling bath (3), corrosion resistance thermocouple (4) and potcher (6)；Descaling bath (3) is placed on magnetic heating stirrer (1) in heating dish (13), the number of descaling bath (3) is determined according to pickling series；Potcher (6) is placed on magnetic force heating stirring In the heating dish (13) of device (1)；Corrosion resistance thermocouple (4) is placed in descaling bath (3) and potcher (6) and is stirred with magnetic force heating Mix the corresponding magnetite rotor (5) of device (1).

2. the experimental provision of simulation strip multistage turbulence acid dip according to claim 1, which is characterized in that the descaling bath (3) it is provided with the hydrochloric acid solution of various concentration, and concentration is incremented by step by step.

3. the experimental provision of simulation strip multistage turbulence acid dip according to claim 1, which is characterized in that the descaling bath (3) interior hydrochloric acid solution volume is no more than the 2/3 of descaling bath (3) volume.

4. simulate the experimental provision of strip multistage turbulence acid dip in -3 described in any claim according to claim 1, it is special Sign is that the interior magnetic heating stirrer of the descaling bath (3) (1) is connected with corrosion resistance thermocouple (4), corrosion resistance thermocouple (4) Hydrochloric acid solution temperature is controlled at 80 ± 20 DEG C.

5. the experimental provision of simulation strip multistage turbulence acid dip according to claim 1, which is characterized in that the potcher (6) interior deionized water volume is no more than the 2/3 of potcher (6) volume.

6. the experimental provision of simulation strip multistage turbulence acid dip according to claim 5, which is characterized in that the potcher (6) interior magnetic heating stirrer (1) is connected with corrosion resistance thermocouple (4), and corrosion resistance thermocouple (4) controls deionized water temperature At 50 ± 20 DEG C.

7. the experimental provision of simulation strip multistage turbulence acid dip according to claim 1, which is characterized in that the descaling bath (3), potcher (6) is made of acidproof, transparent material.