Zinc slag hopper for placing hot galvanizing slag and oily release agent

Abstract

The zinc slag hopper comprises a slag hopper body, wheels are arranged at the bottom of the slag hopper body, the slag hopper body is arranged to be of an integrated structure with the cross section being in an inverted trapezoid shape with the lower portion narrow and the upper portion wide, and the inner side face of the slag hopper body is coated with a high-temperature-resistant coating easy to demould. A slag removing handle is placed in the slag hopper body and is attached to the inner side face of the slag hopper body; and the height of the slag removing handle is higher than that of the slag hopper body. The invention also discloses an oily release agent. According to the zinc slag bucket, flexible collection and transfer operation of zinc slag in a narrow space of a hot galvanizing production line are achieved, the zinc slag and the slag bucket body are rapidly separated, and the formed zinc slag is regular in shape, uniform in component, consistent in weight and easy to store and comprehensively utilize.

Description

Technical Field

[0001] The present invention relates to the zinc slag treatment technology of a hot-dip galvanizing production line, and more specifically, to a zinc slag hopper for placing hot-dip galvanized slag and an oil-based release agent. Background Art

[0002] Hot-dip galvanizing is a simple, effective and widely used steel anti-corrosion process.

[0003] During the hot-dip galvanizing process of steel plates, due to flux reactions, air oxidation, zinc pot erosion, dissolution of iron powder and steel base on the strip surface, etc., a considerable amount of iron, aluminum and other components will enter the zinc liquid and form zinc slag.

[0004] Depending on different compositions, structures, densities and sizes, zinc slag can exist in different states in the zinc liquid, such as bottom slag, surface slag and floating slag.

[0005] The generation of zinc slag will cause the fluidity of the zinc liquid to deteriorate and the zinc utilization rate to decrease. If not removed in time, once deposited or adhered to the immersion roll or steel plate, it will seriously affect the surface quality of the hot-dip galvanized sheet.

[0006] Initially, slag removal was carried out manually, and a long-handled ladle was used to regularly remove slag in front of the zinc pot. However, there are problems such as high working intensity, harsh operating conditions, low slag removal efficiency, and potential safety hazards due to zinc liquid splashing. Currently, most hot-dip galvanizing production lines have started to use robots to remove slag and skim the zinc slag from the surface of the zinc pot.

[0007] In existing patent applications, such as CN214937743U, CN210151201U, CN114507835A, CN102528012A, CN202715820U, CN111101085A, etc., a variety of fully automatic zinc pot surface slag removal systems and their slag removal methods have been disclosed. Through different forms of improvement and enhancement, the aim is to make the slag removal system more flexible, the slag removal efficiency higher, and the entrainment of liquid metal zinc after pouring out of the pot less.

[0008] Whether manual slag removal or robot slag removal is adopted, there are problems with the storage and transportation of the molten liquid zinc slag taken out from the 460°C zinc pot.

[0009] Limited by the equipment installation site conditions, the working space of most hot-dip galvanizing lines is narrow, with high requirements for production safety and product quality. It is hoped that the zinc slag generated by the zinc pot can be collected and transported for treatment as soon as possible without affecting the production rhythm.

[0010] Currently, the collection and transportation methods of zinc slag are relatively rough. Generally, the molten zinc slag is poured into a straight cylindrical slag hopper. After the slag hopper is full, it is quickly transferred by a forklift to an open space for slag dumping operations.

[0011] For another example, a zinc slag ladle disclosed in CN217867734U drives a second driving rod through an adjusting rod to drive the bucket part to complete the slag ladling and slag discharging actions. However, the deformation of the bottom of the zinc slag ladle will affect the measurement accuracy of the zinc slag scale, resulting in weighing deviation; a heat-resistant deformation prevention hot-dip galvanized zinc slag ladle disclosed in CN219239739U sets a heat insulation component to insulate the bottom of the zinc slag ladle, ensuring that the contact part between the zinc slag ladle and the weighing scale will not be deformed due to uneven heat absorption. However, there is a problem that the slag ladle and the zinc slag lumps are adhered and difficult to separate.

[0012] Due to the fast cooling rate of the molten slag in the air and the large amount of entrained liquid zinc, the zinc slag after solidification adheres to the slag ladle and cannot be effectively separated from the slag ladle; during the process of mechanical hammering and manual cutting of the slag ladle and the zinc slag, it is laborious and time-consuming, the damage degree of the slag ladle is high, and the subsequent reuse rate is low; due to the adhesion of the slag ladle material to the zinc slag, the comprehensive utilization is also more difficult. Summary of the Invention

[0013] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a zinc slag ladle for placing hot-dip galvanized slag and an oily mold release agent, realizing the flexible collection and transfer operation of zinc slag in the narrow space of the hot-dip galvanized production line, enabling the zinc slag to be quickly separated from the slag ladle body, and the formed zinc slag has regular shape, uniform composition and consistent weight, and is easy to store and comprehensively utilize.

[0014] To achieve the above purpose, the present invention adopts the following technical solutions:

[0015] The first aspect of the present invention provides a zinc slag ladle for placing hot-dip galvanized slag, including a slag ladle body, and wheels are provided at the bottom of the slag ladle body;

[0016] The slag ladle body is set as an integrated structure with a downward-narrow and upward-wide inverted trapezoidal cross-section, and a high-temperature resistant and easy-to-release coating is applied on its inner side surface;

[0017] A slag lifting handle is placed inside the slag ladle body, and the slag lifting handle fits against the inner side surface of the slag ladle body;

[0018] The height of the slag lifting handle is higher than the height of the slag ladle body.

[0019] Preferably, the slag ladle body is made of thickened ordinary steel; or

[0020] The slag ladle body is a thin-walled steel with reinforcing rib plates arranged around it.

[0021] Preferably, the high-temperature resistant and easy-to-release coating is formed by coating an oily mold release agent on the inner side surface of the slag ladle body.

[0022] Preferably, the slag lifting handle is set as a ring-shaped U shape and is made of a zinc alloy strip.

[0023] Preferably, the wheels are cast iron casters, and universal wheels, directional wheels, rollers or wheel hubs with bearings and high temperature resistance are adopted;

[0024] The number of the wheels is 4 to 8.

[0025] The second aspect of the present invention provides an oily mold release agent applied to the zinc slag hopper for placing hot-dip galvanized slag provided in the first aspect of the present invention, comprising the following components by weight percentage:

[0026] Mineral oil: 40 to 70%;

[0027] Solvent oil: 5 to 25%;

[0028] Silicone oil: 10 to 30%;

[0029] Organic metal salt: 5 to 15%;

[0030] Dispersant: 3 to 5%;

[0031] The oily mold release agent is coated on the inner side surface of the zinc slag hopper for placing hot-dip galvanized slag to form the high temperature resistant and easy demolding coating.

[0032] Preferably, the kinematic viscosity of the mineral oil at 40 °C is 10 to 50 mm 2 / s.

[0033] Preferably, the mineral oil is selected from 32# mineral oil, 46# mineral oil or 68# mineral oil.

[0034] Preferably, the solvent oil is selected from one or a mixture of several of D40 solvent oil, D60 solvent oil, D80 solvent oil, D100 solvent oil.

[0035] Preferably, the silicone oil is selected from one or a mixture of several of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil.

[0036] Preferably, the organic metal salt is an organic zinc salt with a carbon chain length of 4 to 60 carbon atoms.

[0037] Preferably, the dispersant is selected from one or a mixture of several of T151A dispersant, T151B dispersant, T152 dispersant, T154 dispersant, T155 dispersant.

[0038] The zinc slag bucket and oil-based release agent provided by the present invention can flexibly collect and transfer hot-dip galvanized slag in a narrow space, enabling the zinc slag lump to be quickly separated from the bucket body. The formed slag lump has a regular shape, uniform composition, and consistent weight, making it easier to store and comprehensively utilize. The slag lifting handle is a zinc alloy strip, which is used to make it more convenient to lift and transport the slag lump without affecting the utilization of the candidate slag lump. The release agent used in the present invention has a good release effect during the separation of the slag bucket and zinc slag. The organic metal salt burns into metal oxide at high temperature, and the environmentally friendly solvent oil can dissolve the organic metal salt. The base oil and silicone oil have a very high combustion temperature and can provide sufficient release and lubrication effects. The presence of the dispersant can reduce the surface defects of the release. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is the front view schematic diagram of the zinc slag bucket of the present invention;

[0040] Figure 2 is the top view schematic diagram of the zinc slag bucket of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0041] In order to better understand the above technical solutions of the present invention, the technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0042] Combined Figure 1 and Figure 2 As shown, a zinc slag bucket for placing hot-dip galvanized slag provided by the present invention includes a bucket body 1, and wheels 3 are installed at the bottom of the bucket body 1. The above is the prior art part and will not be elaborated here. Different from the prior art, the bucket body 1 of the zinc slag bucket of the present invention is set as an integrated structure with a downward-narrow and upward-wide inverted trapezoidal cross-section, and a high-temperature resistant and easy-to-release coating is applied on its inner side.

[0043] A slag lifting handle 2 is placed inside the bucket body 1. The slag lifting handle 2 is set as a circular U shape, and its two upwardly tilted ends are symmetrically attached to two opposite inner sides of the bucket body 1.

[0044] The height of the slag lifting handle 2 is higher than the height of the bucket body 1, which is convenient for the forklift to insert and transfer.

[0045] The inverted trapezoidal structure of the bucket body 1 is convenient for pouring and dissipating heat of the molten zinc slag; and the integrated structure makes it simple to separate the bucket body 1 and the slag lump formed by the zinc slag.

[0046] The material of the bucket body 1 is a high-temperature resistant and deformation-resistant metal material, which can be made of thickened ordinary steel; or a thin-walled steel with reinforcing rib plates arranged around the bucket body 1.

[0047] The wheel 3 is a cast iron caster, which adopts a universal wheel, a fixed wheel, a roller or a bearing high-temperature resistant wheel hub, and the number is 4 to 8. The function of the wheel 3 is to flexibly move the slag bucket body 1 in a narrow space. The bearing capacity of the wheel 3 needs to be calculated to ensure that it can bear the weight of the slag bucket body 1 and the zinc slag in the slag bucket body 1.

[0048] The slag lifting handle 2 is made of a zinc alloy strip. The slag lifting handle 2 is not connected to the slag bucket body 1. Before each slag pouring, the slag lifting handle 2 is placed inside the slag bucket body 1 from top to bottom and fits through, forming a semi-circular handle on both sides of the slag bucket body 1, which is convenient for forklift operation.

[0049] After the slag is poured, the slag mass adheres to the slag lifting handle 2. When it cools and solidifies, the forklift can take away the slag mass from the slag bucket body 1 through the slag lifting handle 2 that protrudes outside the slag bucket body 1.

[0050] The slag lifting handle 2 and the formed slag mass are transported away together for comprehensive utilization. This operation is simpler and the slag mass is more conducive to comprehensive utilization.

[0051] The high-temperature resistant and easy-to-release coating applied on the inner side of the slag bucket body 1 is formed by coating an oil-based release agent on the inner side of the slag bucket body 1. The purpose is to prevent the molten slag from adhering to the inner wall of the slag bucket body 1. Depending on the adhesion degree of the slag bucket body 1 and the zinc slag at the site, it is generally coated 1 to 3 times a week.

[0052] The use of the zinc slag bucket of the present invention is as follows:

[0053] After the hot-dip galvanized slag in a high-temperature molten state is fished into the slag bucket body 1 manually or mechanically, the rapidly cooled molten slag adheres to the slag lifting handle 2. When the slag bucket body 1 is full, the slag bucket body 1 is led to the forklift through the slag lifting handle 2 and the wheel 3. The forklift inserts into the slag lifting handle 2 to separate the demolded formed slag mass from the slag bucket body 1, transports the slag mass together with the slag lifting handle 2 outside for comprehensive utilization, and the emptied slag bucket body 1 returns to continue to be used beside the zinc pot.

[0054] The present invention also provides an oil-based release agent, which comprises the following components by weight percentage:

[0055] Mineral oil: 40 - 70%;

[0056] Solvent oil: 5 - 25%;

[0057] Silicone oil: 10 - 30%;

[0058] Organic metal salt: 5 - 15%;

[0059] Dispersant: 3 - 5%;

[0060] The oil-based release agent of the present invention is coated on the inner side of the zinc slag bucket of the present invention to form a high-temperature resistant and easy-to-release coating.

[0061] The kinematic viscosity of the mineral oil at 40 °C is 10 to 50 mm 2 / s.

[0062] The mineral oil selected is 32# mineral oil, 46# mineral oil or 68# mineral oil.

[0063] The solvent oil selected is one or a mixture of several of D40 solvent oil, D60 solvent oil, D80 solvent oil, and D100 solvent oil.

[0064] The silicone oil selected is one or a mixture of several of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, and methyl hydrogen-containing silicone oil.

[0065] The organic metal salt selected is an organic zinc salt with a carbon chain length of 4 to 60 carbon atoms.

[0066] The dispersant selected is one or a mixture of several of T151A dispersant, T151B dispersant, T152 dispersant, T154 dispersant, and T155 dispersant.

[0067] The preparation process of the oil-based mold release agent of the present invention is as follows: Weigh the organic metal salt, add it to the solvent oil and stir, and then add the base oil, silicone oil, and dispersant and stir for 0.5 to 1 hour. Sampling and observing when it is basically transparent is okay.

[0068] The oil-based mold release agent of the present invention is a functional substance between the mold and the finished product. Its function is to smoothly separate the cooled sample from the mold, obtain a smooth and flat product, and ensure the mold can be used multiple times.

[0069] High-temperature mold release agents are widely used in the casting and forging processes in the metallurgy and machining fields. It is required that the mold release agent has the characteristics of easy preparation, low cost, good adhesion, high temperature resistance, and good mold release effect.

[0070] Examples

[0071] In an 850 hot-dip galvanizing production line of a cold rolling mill, robot slag removal is adopted. The zinc pot has specifications of 8 m (length) × 5 m (width) × 2.5 m (depth), and 1000 tons of zinc slag are produced annually. The original method of collecting and transporting zinc slag was: pouring the molten zinc slag into a straight cylindrical slag bucket. After the slag bucket was full, it was quickly transferred by a forklift to an open space for slag dumping operations. Because the molten slag cools quickly in the air and there is a large amount of entrained liquid zinc, after solidification, the zinc slag adheres to the slag bucket and cannot be effectively separated from the slag bucket. During the process of mechanically hammering and manually cutting the slag bucket and the zinc slag, it is laborious and time-consuming, the damage degree of the slag bucket is high, and the subsequent reuse rate is low. Due to the adhesion of the slag bucket material to the zinc slag, the comprehensive utilization is also more difficult.

[0072] Combined with Figure 1 and Figure 2As shown in the figure, the zinc slag bucket of the present invention is adopted. The height of the slag bucket body 1 is 50 cm, with a narrow bottom (40 cm × 50 cm) and a wide top (50 cm × 70 cm), and it has an integrated inverted trapezoid cross-section structure. The slag bucket body 1 is made of austenitic chromium-nickel high-temperature resistant stainless steel plate 310S with a thickness of 10 cm. Four high-temperature resistant casters 3 (universal wheels are selected) are provided at the bottom of the slag bucket body 1. The inner side of the slag bucket body 1 is coated with a high-temperature resistant and easy-to-release coating, and a slag lifting handle 2 is placed inside the slag bucket body 1.

[0073] The inner side of the slag bucket body 1 is coated with a high-temperature resistant and easy-to-release coating, and it is coated 2 times a week. The main components and weight percentages of the oily release agent are: mineral oil (60%), environmentally friendly solvent oil (15%), silicone oil (15%), organic metal salt (5%), and dispersant (5%).

[0074] The mineral oil is 32#, the environmentally friendly solvent oil is D40, the silicone oil is ethyl silicone oil, the organic metal salt is an organic zinc salt with a carbon chain length of 30 carbon atoms, and the dispersant is T151B.

[0075] The preparation process of the release agent is as follows: Weigh the organic metal salt, add it to the environmentally friendly solvent oil and stir, then add the base oil, silicone oil, and dispersant and stir for 0.5 hours. Sampling and observing until it is basically transparent.

[0076] The slag lifting handle 2 is a slender annular zinc alloy strip, which is not connected to the slag bucket body 1. Before each slag pouring, the slag lifting handle 2 is placed inside the slag bucket from top to bottom and fits through, forming semi-circular handles on both sides of the slag bucket body 1, which is convenient for forklift operation.

[0077] After the hot-dip galvanized slag in high-temperature molten state is fished into the slag bucket body 1 by a robot, the rapidly cooled molten slag adheres to the slag lifting handle 2. When the slag bucket body 1 is full, the slag bucket body 1 is led to the forklift through the slag lifting handle 2 and the casters 3. The forklift inserts into the slag lifting handle 2 to separate the molded slag lump after demoulding from the slag bucket body 1. The slag lump together with the slag lifting handle 2 is transported out for comprehensive utilization, and the emptied slag bucket body 1 returns to the side of the zinc pot for continued use.

[0078] This embodiment realizes the flexible collection and transfer operation of hot-dip galvanized slag in a narrow space near the zinc pot, enables the rapid separation of the zinc slag lump from the slag bucket body, and the molded slag lump has a regular shape, uniform composition, and consistent weight, making it easier to store and comprehensively utilize.

[0079] The slag lifting handle 2 in this embodiment is a zinc alloy strip, which functions to make slag lifting and hoisting the slag lump more convenient and does not affect the utilization of the candidate slag lump.

[0080] The oily mold release agent used in this embodiment has a very good release effect during the separation process of the slag bucket body 1 and zinc slag. The organic metal salt burns into metal oxide at high temperature, and the environmentally friendly solvent oil can dissolve the organic metal salt. The base oil and silicone oil have very high combustion temperatures and can provide sufficient release and lubrication effects. The presence of the dispersant can make the surface defects of the release less.

[0081] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as within the scope of the substantial spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A zinc slag hopper for placing hot-dip galvanized slag, comprising a hopper body, wherein wheels are provided at the bottom of the hopper body, and it is characterized in that: The hopper body is arranged as an integrated structure with a lower-narrow and upper-wide inverted trapezoidal cross-section, and a high-temperature resistant and easy-to-release coating is coated on its inner side surface; A slag-lifting handle is placed inside the hopper body, and the slag-lifting handle is attached to the inner side surface of the hopper body; The height of the slag-lifting handle is higher than the height of the hopper body.

2. The zinc slag hopper for placing hot-dip galvanized slag according to claim 1, characterized in that: The hopper body is made of thickened ordinary steel; or The hopper body is a thin-walled steel with reinforcing rib plates arranged around it.

3. The zinc slag hopper for placing hot-dip galvanized slag according to claim 1, characterized in that: The high-temperature resistant and easy-to-release coating is formed by coating an oil-based release agent on the inner side surface of the hopper body.

4. The zinc slag hopper for placing hot-dip galvanized slag according to claim 1, characterized in that: The slag-lifting handle is arranged as a ring-shaped U shape and is made of a zinc alloy strip.

5. The zinc slag hopper for placing hot-dip galvanized slag according to claim 1, wherein: The wheels are cast iron casters, and are universal wheels, directional wheels, rollers or bearing high-temperature resistant wheel hubs; The number of the wheels is 4 to 8.

6. An oil-based release agent for a zinc slag hopper for placing hot-dip galvanized slag as described in any one of claims 1-5, characterized in that, It includes the following components by weight percentage: Mineral oil: 40 - 70%; Solvent oil: 5 - 25%; Silicone oil: 10 - 30%; Organic metal salt: 5 - 15%; Dispersant: 3 - 5%; The oil-based release agent is coated on the inner side surface of the zinc slag hopper for placing hot-dip galvanized slag to form the high-temperature resistant and easy-to-release coating.

7. The oily mold release agent according to claim 6, wherein: The kinematic viscosity of the mineral oil at 40 °C is 10 to 50 mm 2 / s, The mineral oil is selected from 32# mineral oil, 46# mineral oil or 68# mineral oil.

8. The oil-based release agent according to claim 6, wherein: The solvent oil is selected from one or a mixture of several of D40 solvent oil, D60 solvent oil, D80 solvent oil, D100 solvent oil.

9. The oil-based mold release agent according to claim 6, characterized in that: The silicone oil is selected from one or a mixture of several of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil.

10. The oily mold release agent according to claim 6, wherein: The organic metal salt is selected from organic zinc salts with a carbon chain length of 4 to 60 carbon atoms.

11. The oil-based release agent according to claim 6, characterized in that: The dispersant is selected from one or a mixture of several of T151A dispersant, T151B dispersant, T152 dispersant, T154 dispersant, T155 dispersant.

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