An emulsion circulating filtering system for a single-rack precision stamping and punching rolling mill

Abstract

The utility model discloses a kind of precision punching single rack rolling mill emulsion circulation filtering systems, including collection tank, be set below the roll of precision punching single rack rolling mill;Emulsion tank is divided into dirty oil tank connected with collection tank and clean oil tank connected with precision punching single rack rolling mill, dirty oil tank and clean oil tank are not communicated between;Magnetic filter tank is connected with dirty oil tank bottom outlet;The magnetic filter tank inside is equipped with magnetic filter, to carry out magnetic filtration to emulsion from dirty oil tank;Vacuum filter bed, its inlet is connected with magnetic filter tank, and the vacuum filter bed is filtered by filter paper oil dirt and medium fine impurity particles in emulsion;Vacuum filter bed is equipped with overflow outlet connected with dirty oil tank and filtrate outlet connected with clean oil tank;Filter jar is located between emulsion tank clean oil tank and precision punching single rack rolling mill.The utility model can solve precision punching single rack rolling mill emulsion cleaning treatment and rolling strip surface quality problem.

Description

Technical Field

[0001] This utility model relates to the technology of emulsion treatment in rolling mills, and more specifically, to a circulating filtration system for emulsion in a single-stand rolling mill for fine stamping steel. Background Technology

[0002] During cold rolling, the strip steel has a large rolling reduction and generates a lot of heat due to friction between the rolls and the strip steel. Spraying with emulsion during rolling can effectively reduce and control the temperature of the rolls and strip steel, resulting in good strip shape and surface quality. In particular, when rolling fine blanking steel with high carbon content and alloys, carbon powder and iron powder are more likely to be generated on the surface of the strip steel and rolls. These powders enter the collection and circulation system with the emulsion. After a certain period of accumulation, they damage the purity and related parameters of the emulsion, resulting in poor rolling and affecting the surface quality of the strip steel.

[0003] In existing technologies, single-stand emulsion circulation filtration systems typically include a collection tank, an emulsion tank, a magnetic filter, and a vacuum filter bed. During operation, the emulsion sprayed during rolling falls back into the collection tank, and then naturally flows back to the dirty oil tank. The magnetic filter in the dirty oil tank continuously adsorbs iron powder from the emulsion. Simultaneously, the output pump pumps the emulsion into the vacuum filter bed, where continuously moving filter paper filters out impurities and foreign matter. The emulsion then flows back to the clean oil tank, where it is sprayed onto the rolls and strip by the output pump, thus completing the working cycle.

[0004] Through continuous practical analysis, the following defects have been found in existing emulsion circulation filtration systems:

[0005] 1. The magnetic filter is placed in the dirty oil tank. Since the dirty oil tank is the only essential path in the rolling cycle, the magnetic rods and other magnetic materials that have been adsorbed for a long time are not easy to clean daily. When cleaning, the machine needs to be stopped and the emulsion drained for special treatment. At the same time, the magnetic filter is only an auxiliary process in the main circulation network and can only filter a portion of the emulsion flowing near the magnetic filter, so its function is limited.

[0006] 2. After being filtered by the vacuum filter bed, some of the emulsion cannot flow in the bottom chamber of the filter. Over time, a large amount of iron powder will accumulate. After combining with the rolling oil in the emulsion, it will reform into granular sludge, which is free in the emulsion. It is then pumped to the emulsion clean oil tank by the circulation pump and sprayed into the rolls and roll gap by the output pump, causing quality defects such as roll surface damage, strip surface imprints, and bubble marks.

[0007] 3. Quality defects such as embossing and bubble marks increase the number of times rolls need to be changed and repaired, affecting output and production efficiency, reducing the service life of the rolls, and increasing costs.

[0008] Therefore, it is particularly important to design a new type of emulsion circulation filtration system for single-stand fine stamping mills to address the above problems. Utility Model Content

[0009] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a circulating filtration system for emulsion in a single-stand rolling mill for fine stamping steel, which effectively improves the cleanliness of the emulsion, reduces the iron powder content in the emulsion, and solves the problems of clean treatment of emulsion and surface quality of rolled strip in a single-stand rolling mill for fine stamping steel.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] This utility model provides a circulating filtration system for emulsion in a single-stand rolling mill for fine stamping steel, including...

[0012] The collection tank is located below the rolls of the single-stand rolling mill for fine steel to collect the emulsion sprayed during the rolling process.

[0013] The emulsion tank is divided into a dirty oil tank connected to the collection tank and a clean oil tank connected to the single-stand rolling mill for fine stamping steel. The dirty oil tank and the clean oil tank are not connected.

[0014] A magnetic filter box is connected to the bottom outlet of the dirty oil tank; the magnetic filter box is equipped with a magnetic filter to magnetically filter the emulsion from the dirty oil tank.

[0015] A vacuum filter bed, the inlet of which is connected to the magnetic filter box, filters oil and medium-fine impurity particles in the emulsion through filter paper; the vacuum filter bed is provided with an overflow outlet connected to the dirty oil tank and a filtrate outlet connected to the clean oil tank;

[0016] A filter tank is located between the emulsion tank, the clean oil tank, and the single-stand rolling mill for fine stamping steel. It is used to filter the emulsion from the clean oil tank again and return the filtered emulsion to the single-stand rolling mill for fine stamping steel.

[0017] Preferably, an input pump is provided between the dirty oil tank of the emulsion tank and the magnetic filter tank.

[0018] Preferably, the magnetic filter of the magnetic filter box includes a magnetic rod for adsorbing iron powder and a mechanical rake for scraping the iron powder off the magnetic rod.

[0019] Preferably, the filter paper on the vacuum filter bed has a precision of 75–100 μm.

[0020] Preferably, the filter canister is provided with a filter bag, and the filter bag has a precision of 25-50 μm.

[0021] The emulsion circulation and filtration system for a single-stand fine stamping mill provided by this utility model has the following beneficial effects:

[0022] 1) Effectively improved the cleanliness of the emulsion;

[0023] 2) It reduces the iron powder content in the emulsion, improves the aggregation of iron powder sludge particles, and thus significantly improves the surface quality of the strip steel.

[0024] 3) The magnetic filter is easy to clean, reducing the discharge of emulsion pollution and environmental pressure;

[0025] 4) The filter bags inside the filter tank are easy to replace, making the operation convenient and the operating cost low;

[0026] 5) It shortens the roll replacement cycle, increases the roll service life, and reduces costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an emulsion circulation filtration system for a single-stand rolling mill of fine stamping steel according to this utility model;

[0028] In the diagram, 1 is the collection tank; 2 is the emulsion tank; 3 is the vacuum filter bed; 4 is the magnetic filter box; and 5 is the filter canister. Detailed Implementation

[0029] To better understand the above-mentioned technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the embodiments.

[0030] Combination Figure 1 As shown, this utility model provides an emulsion circulation filtration system for a single-stand rolling mill for fine stamping steel, including a collection tank 1, an emulsion tank 2, a magnetic filter box 4, a vacuum filter bed 3, and a filter canister 5.

[0031] The collection tank 1 is located below the rolls of the single-stand rolling mill for fine steel to collect the emulsion sprayed during the rolling process.

[0032] The emulsion tank 2 is divided into a dirty oil tank connected to the collection tank 1 and a clean oil tank connected to the single-stand rolling mill for fine stamping steel. The dirty oil tank and the clean oil tank are not connected. In a preferred embodiment, an input pump is provided between the dirty oil tank of the emulsion tank 2 and the magnetic filter box 4.

[0033] The magnetic filter box 4 is connected to the bottom outlet of the dirty oil tank. The magnetic filter box 4 contains a magnetic filter for magnetically filtering the emulsion from the dirty oil tank. In a preferred embodiment, the magnetic filter in the magnetic filter box 4 includes a magnetic rod for adsorbing iron powder and a mechanical rake for scraping off the iron powder from the magnetic rod. The present invention features a separate magnetic filter box 4, with the magnetic filter placed inside. The emulsion in the dirty oil tank is pumped into the magnetic filter box 4, where the magnetic rod and mechanical rake continuously adsorb and remove iron powder. The separate magnetic filter box 4 facilitates easy cleaning, reducing the environmental burden of previously requiring the discharge of the entire tank of emulsion. Simultaneously, the separate magnetic filter, as a link in the main circulation network, is the necessary pathway for the emulsion in the dirty oil tank to enter the vacuum filter bed 3, ensuring thorough magnetic filtration and reducing the amount of iron powder entering the next process. The processing capacity of the magnetic filter is designed to be 2-3 times the working flow rate of the emulsion, ensuring sufficient processing capacity without wasting investment.

[0034] The inlet of the vacuum filter bed 3 is connected to the magnetic filter box 4. The vacuum filter bed 3 filters oil and medium-fine impurities from the emulsion through filter paper. The vacuum filter bed 3 is equipped with an overflow outlet connected to the dirty oil tank and a filtrate outlet connected to the clean oil tank. The vacuum filter bed 3 of this invention further filters oil and medium-fine impurities from the magnetically filtered emulsion through filter paper, ensuring the cleanliness of the emulsion returned to the clean oil tank. The filter paper precision is set to 75–100 μm, and the paper feeding time is set to once every two hours. The length of paper fed each time is equal to the filter bed length * 0.8, ensuring filtration efficiency without wasting filter paper.

[0035] Filter tank 5 is located between the emulsion tank 2 (clean oil tank) and the single-stand finishing mill for fine-stamping steel. It is used to further filter the emulsion from the clean oil tank and return the filtered emulsion to the single-stand finishing mill. Filter tank 5, located between the clean oil tank and the single-stand finishing mill, serves as the final stage in the main circulation network. It further filters out any iron powder and sludge particles that have leaked through the filter, resulting in cleaner emulsion sprayed onto the roll gaps of the mill stand. This reduces damage to the roll surfaces, significantly improves surface defects such as strip embossing and bubble marks, and enhances the surface quality of the strip. Inside filter tank 5, the emulsion flows from the top side into the filter bag, then flows from inside the filter bag to the outside. The filtered iron powder impurities are trapped inside the filter bag. The filter bag is replaced periodically according to the frequency of emulsion use to further clean the emulsion. In the entire filtration cycle system, since the previous process has already carried out dual filtration with vacuum filter bed 3 and magnetic filter, large iron powder particles and other impurities have been cleaned well. At this time, the filter bag precision is set to 50-25μm.

[0036] Combination Figure 1As shown, during operation of the single-stand finishing mill, the emulsion sprayed during rolling falls back into the collection tank 1. The emulsion in the collection tank 1 naturally flows back into the dirty oil tank of the emulsion tank 2. The magnetic filter is separate from the dirty oil tank and is housed in a separate magnetic filter box 4. The magnetic filter is placed inside the magnetic filter box 4. The emulsion in the dirty oil tank is pumped into the magnetic filter box 4 by the input pump. The magnetic filter continuously adsorbs and scrapes off the iron powder in the emulsion. At the same time, the output pump pumps the magnetically filtered emulsion into the vacuum filter bed 3. The continuously moving filter paper filters out impurities and foreign matter in the emulsion, and then it flows back to the clean oil tank. A filter tank 5 is set between the clean oil tank and the single-stand finishing mill. The output pump then sprays the emulsion onto the mill rolls and roll gaps, thus completing the working cycle.

[0037] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A circulating filtration system for emulsion in a single-stand rolling mill for fine stamping steel, characterized in that: include The collection tank is located below the rolls of the single-stand rolling mill for fine steel to collect the emulsion sprayed during the rolling process. The emulsion tank is divided into a dirty oil tank connected to the collection tank and a clean oil tank connected to the single-stand rolling mill for fine stamping steel. The dirty oil tank and the clean oil tank are not connected. A magnetic filter box is connected to the bottom outlet of the dirty oil tank; the magnetic filter box is equipped with a magnetic filter to magnetically filter the emulsion from the dirty oil tank. A vacuum filter bed, the inlet of which is connected to the magnetic filter box, filters oil and medium-fine impurity particles in the emulsion through filter paper; the vacuum filter bed is provided with an overflow outlet connected to the dirty oil tank and a filtrate outlet connected to the clean oil tank; A filter tank is located between the emulsion tank, the clean oil tank, and the single-stand rolling mill for fine stamping steel. It is used to filter the emulsion from the clean oil tank again and return the filtered emulsion to the single-stand rolling mill for fine stamping steel.

2. The emulsion circulation filtration system for a single-stand rolling mill for fine stamping steel according to claim 1, characterized in that: An input pump is provided between the dirty oil tank of the emulsion tank and the magnetic filter tank.

3. The emulsion circulation filtration system for a single-stand rolling mill for fine stamping steel according to claim 1, characterized in that: The magnetic filter of the magnetic filter box includes a magnetic rod for adsorbing iron powder and a mechanical rake for scraping the iron powder off the magnetic rod.

4. The emulsion circulation filtration system for a single-stand rolling mill for fine stamping steel according to claim 1, characterized in that: The filter paper on the vacuum filter bed has a precision of 75–100 μm.

5. The emulsion circulation filtration system for a single-stand rolling mill for fine stamping steel according to claim 1, characterized in that: The filter canister is equipped with a filter bag, and the filter bag has a precision of 25-50 μm.

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