Material proportioning equipment for austenitic stainless steel intergranular corrosion resistance production

Abstract

The utility model belongs to the technical field of metallurgical equipment, particularly relates to material proportioning equipment for austenitic stainless steel intergranular corrosion resistance production, and provides the following scheme aiming at the problems of insufficient proportioning precision and serious impurity residue in the background technology: the material proportioning equipment comprises a bracket, and a double-screw conveyor is arranged on the outer wall of the top of the weighing table. The double-screw conveyor is linked with the weighing platform, the weight of materials is fed back to the PLC electric control cabinet in real time, the conveying speed is dynamically adjusted, and the matching error of key elements such as Cr and Ni is reduced. The design of the material supplementing pipe and the material distributing pipe supports multi-batch trace adding, component fluctuation caused by one-time feeding is avoided, the screen can intercept large-particle impurities, the electromagnetic iron remover adsorbs metal chippings through a high-intensity magnetic field, and the impurity removal rate is increased. And the top tank and the bottom hopper are designed in a split manner, so that the screen and the electromagnetic iron remover are convenient to clean regularly, the maintenance is convenient, and continuous production is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and in particular to a material proportioning device for the production of austenitic stainless steel with resistance to intergranular corrosion. Background Technology

[0002] Austenitic stainless steel is widely used in chemical, energy, and medical fields due to its excellent corrosion resistance and mechanical properties. However, during the smelting process, the accuracy of material proportioning and impurity control directly affect its resistance to intergranular corrosion. Existing material proportioning equipment often suffers from the following problems:

[0003] 1. Insufficient proportioning accuracy: Traditional equipment relies on manual feeding or a single conveying mechanism, which can easily lead to deviations in the proportion of alloying elements (such as Cr and Ni), affecting the formation of the passivation film of stainless steel and exacerbating the risk of intergranular corrosion.

[0004] 2. Severe impurity residue: The raw materials are often mixed with metal fragments (such as Fe particles) or non-metallic inclusions. The screening and iron removal capabilities of existing equipment are limited, and impurities are easily left in the mixture, becoming active sites for corroding micro batteries. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a material proportioning device for the production of austenitic stainless steel with resistance to intergranular corrosion, which overcomes the shortcomings of the prior art and effectively solves the problems of insufficient proportioning accuracy and serious impurity residue.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A material proportioning device for producing austenitic stainless steel with resistance to intergranular corrosion includes a support frame. A weighing platform is fixedly connected to the top outer wall of the support frame by screws. A twin-screw conveyor is installed on the top outer wall of the weighing platform. A storage silo is welded to the top outer wall of the twin-screw conveyor. A screen and an electromagnetic separator are installed inside the storage silo. A discharge cylinder is welded to one end of the twin-screw conveyor. A mixing tank is fixedly connected to the bottom outer wall of the discharge cylinder.

[0008] Preferably, the storage silo includes a top tank and a bottom hopper, wherein the top tank and the bottom hopper are fixedly connected by a flange.

[0009] Preferably, the screen is installed on the inner wall of the top tank, and a connecting plate is welded to the inner wall of the bottom hopper, with the electromagnetic separator installed on the top outer wall of the connecting plate.

[0010] Preferably, a first stirring motor is fixedly connected to the center of the top outer wall of the storage silo by screws, and a feeding pipe is fixedly connected to the top outer wall of the storage silo on one side of the first stirring motor.

[0011] Preferably, a second stirring motor is fixedly connected to the center of the top outer wall of the mixing tank by screws, and a distributing pipe is installed on the side of the top outer wall of the mixing tank located on the side of the second stirring motor.

[0012] Preferably, a PLC control cabinet is fixedly connected to the top outer wall of the bracket by bolts, and the PLC control cabinet is connected to the twin screw conveyor, the electromagnetic separator, the first stirring motor and the second stirring motor by signal lines.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The material proportioning equipment for the production of austenitic stainless steel with intergranular corrosion resistance designed in this project adopts a twin-screw conveyor linked to a weighing platform. The material weight is fed back to the PLC control cabinet in real time, dynamically adjusting the conveying speed to reduce proportioning errors of key elements such as Cr and Ni. The feeding pipe and distribution pipe are designed to support multiple batches of micro-additions, avoiding compositional fluctuations caused by single-batch feeding.

[0015] 2. This design features a material proportioning equipment for producing austenitic stainless steel with resistance to intergranular corrosion. The screen can intercept large particles of impurities, and the electromagnetic separator uses a strong magnetic field to adsorb metal debris, improving the impurity removal rate. Furthermore, the separate design of the top tank and bottom hopper facilitates regular cleaning of the screen and electromagnetic separator, making maintenance convenient and not affecting continuous production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a material proportioning device for producing austenitic stainless steel with resistance to intergranular corrosion, as proposed in this utility model.

[0017] Figure 2 This invention provides a schematic diagram of the disassembled structure of the storage silo in a material proportioning device for producing austenitic stainless steel with resistance to intergranular corrosion. Figure 1 ;

[0018] Figure 3 This invention provides a schematic diagram of the disassembled structure of the storage silo in a material proportioning device for producing austenitic stainless steel with resistance to intergranular corrosion. Figure 2 .

[0019] In the diagram: 1. Support frame; 2. Weighing platform; 3. Twin screw conveyor; 4. Storage silo; 41. Top tank; 42. Bottom hopper; 5. Discharge cylinder; 6. Mixing tank; 7. Screen; 8. Connecting plate; 9. Electromagnetic separator; 10. First stirring motor; 11. Feeding pipe; 12. Second stirring motor; 13. Distribution pipe; 14. PLC control cabinet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example 1, refer to Figure 1 A material proportioning device for producing austenitic stainless steel with resistance to intergranular corrosion includes a support frame 1. A weighing platform 2 is fixedly connected to the top outer wall of the support frame 1 by screws. A twin-screw conveyor 3 is installed on the top outer wall of the weighing platform 2. A storage silo 4 is welded to the top outer wall of the twin-screw conveyor 3. A screen 7 and an electromagnetic separator 9 are respectively installed inside the storage silo 4. A discharge cylinder 5 is welded to one end of the twin-screw conveyor 3, and a mixing tank 6 is fixedly connected to the bottom outer wall of the discharge cylinder 5. The weighing platform 2 has a built-in high-precision pressure sensor and communicates with a PLC through an RS485 interface to transmit material weight data in real time.

[0022] In this embodiment, a twin-screw conveyor 3 is linked with a weighing platform 2 to provide real-time feedback of material weight to the PLC control cabinet 14, dynamically adjusting the conveying speed to reduce the proportioning error of key elements such as Cr and Ni. The feeding pipe 11 and the distributing pipe 13 are designed to support multiple batches of micro-additions, avoiding composition fluctuations caused by single-batch feeding.

[0023] Example 2, refer to Figures 2-3 A material proportioning device for the production of austenitic stainless steel with resistance to intergranular corrosion, wherein the storage silo 4 includes a top tank 41 and a bottom hopper 42, wherein the top tank 41 and the bottom hopper 42 are fixedly connected by a flange, a screen 7 is installed on the inner wall of the top tank 41, and a connecting plate 8 is welded on the inner wall of the bottom hopper 42, and an electromagnetic iron separator 9 is installed on the top outer wall of the connecting plate 8.

[0024] In this embodiment, the screen 7 can intercept large particles of impurities, and the electromagnetic separator 9 uses a strong magnetic field to adsorb metal debris, thus improving the impurity removal rate. Furthermore, the separate design of the top tank 41 and the bottom hopper 42 facilitates regular cleaning of the screen 7 and the electromagnetic separator 9, making maintenance convenient and not affecting continuous production.

[0025] Reference Figure 1 The first stirring motor 10 is fixedly connected to the center of the top outer wall of the storage silo 4 by screws, and the feeding pipe 11 is fixedly connected to the side of the top outer wall of the storage silo 4 on the first stirring motor 10.

[0026] Reference Figure 1 A second stirring motor 12 is fixedly connected to the center of the top outer wall of the mixing tank 6 by screws, and a distribution pipe 13 is installed on the side of the top outer wall of the mixing tank 6 located on the second stirring motor 12.

[0027] Reference Figure 1The top outer wall of the bracket 1 is fixedly connected to the PLC control cabinet 14 by bolts, and the PLC control cabinet 14 is connected to the twin screw conveyor 3, the electromagnetic iron separator 9, the first stirring motor 10 and the second stirring motor 12 by signal lines.

[0028] Working principle:

[0029] Feeding and pretreatment stage: Raw materials are fed into storage silo 4 through feeding pipe 11. The first stirring motor 10 is started, and the spiral blades push the material towards the screen 7. Large particles of impurities are intercepted and cleaned manually periodically. The screened material enters the bottom hopper 42. The electromagnetic iron separator 9 is energized to generate a strong magnetic field, which adsorbs metal fragments such as Fe and Mn. The purified raw material falls into the twin-screw conveyor 3.

[0030] Precision conveying and metering stage: The twin-screw conveyor 3 adjusts its speed according to PLC instructions to convey the material to the weighing platform 2; the weighing data is fed back in real time, and the PLC dynamically corrects the conveying volume to the target value. The qualified material enters the mixing tank 6 through the discharge cylinder 5, and the unqualified part is returned to the storage silo 4 for reprocessing through the distribution pipe 13.

[0031] Mixing and Output Stage: The second stirring motor 12 inside the mixing tank 6 starts, and the turbine propeller rotates at high speed to create turbulence, allowing the matrix material and additives (such as Ti powder) to fully blend. After mixing is completed, the pneumatic valve at the bottom of the tank opens, and the finished material is transported to the smelting furnace through pipelines. At the same time, the PLC records production data and generates reports.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A material proportioning device for producing austenitic stainless steel with resistance to intergranular corrosion, comprising a support frame (1), characterized in that, The top outer wall of the support (1) is fixedly connected to a weighing platform (2) by screws, and a twin-screw conveyor (3) is provided on the top outer wall of the weighing platform (2). A storage bin (4) is welded on the top outer wall of the twin-screw conveyor (3), and a screen (7) and an electromagnetic separator (9) are respectively provided inside the storage bin (4). A discharge cylinder (5) is welded to one end of the twin-screw conveyor (3), and a mixing tank (6) is fixedly connected to the bottom outer wall of the discharge cylinder (5).

2. The material proportioning equipment for producing austenitic stainless steel with resistance to intergranular corrosion according to claim 1, characterized in that, The storage bin (4) includes a top tank (41) and a bottom hopper (42), wherein the top tank (41) and the bottom hopper (42) are fixedly connected by a flange.

3. The material proportioning equipment for producing austenitic stainless steel with resistance to intergranular corrosion according to claim 1, characterized in that, The screen (7) is installed on the inner wall of the top tank (41), and a connecting plate (8) is welded on the inner wall of the bottom hopper (42). The electromagnetic iron separator (9) is installed on the top outer wall of the connecting plate (8).

4. The material proportioning equipment for producing austenitic stainless steel with resistance to intergranular corrosion according to claim 1, characterized in that, The storage bin (4) is fixedly connected to the center of the top outer wall by screws, and the top outer wall of the storage bin (4) is fixedly connected to the side of the first stirring motor (10) by a feeding pipe (11).

5. The material proportioning equipment for producing austenitic stainless steel with resistance to intergranular corrosion according to claim 1, characterized in that, The mixing tank (6) has a second stirring motor (12) fixedly connected to the center of the top outer wall by screws, and a distribution pipe (13) is installed on the side of the top outer wall of the mixing tank (6) located on the second stirring motor (12).

6. The material proportioning equipment for producing austenitic stainless steel with resistance to intergranular corrosion according to claim 1, characterized in that, The top outer wall of the bracket (1) is fixedly connected to a PLC control cabinet (14) by bolts, and the PLC control cabinet (14) is connected to the twin screw conveyor (3), the electromagnetic iron remover (9), the first stirring motor (10) and the second stirring motor (12) by signal lines.

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