A round billet continuous casting machine starting device

Abstract

The utility model relates to a kind of round billet continuous casting machine pouring opening device, belong to alloy liquid casting field.The device is located in crystallizer, including the dummy bar head being set in crystallizer copper pipe, material basket is set above the dummy bar head, the annular gap is left between the material basket and the inner wall of crystallizer copper pipe, the refractory mud layer and iron filings layer are arranged between the upper and lower layers of the dummy bar head of the material basket, the iron filings layer is located above the refractory mud layer, the annular gap between the bottom of material basket and the inner wall of crystallizer copper pipe is sealed by the refractory mud layer, cold charge is set in the material basket, connecting piece is vertically set in the material basket, the lower end of the connecting piece is in contact with the bottom of material basket, and the upper end exceeds the upper mouth of material basket.The utility model can effectively reduce continuous casting machine pouring opening leakage accident, stabilize production, improve production efficiency, and protect equipment.

Description

Technical Field

[0001] This utility model relates to the field of casting, specifically to a casting start device for a continuous casting machine. Background Technology

[0002] The manual start-up method for round billet continuous casting machines offers advantages such as flexible adjustment of stopper rod position, rapid response, and timely adjustment of the crystallizer steel flow. It is not limited by occasional fluctuations in equipment or computer systems, or by interlocking control mechanisms, and is characterized by speed, timeliness, and stability. Currently, most steel producers in China choose the manual start-up mode. However, manual start-up still carries certain risks, primarily the risk of steel leakage during start-up, which severely impacts safe and continuous production, involves personal safety and significant process costs. Furthermore, the subsequent short-flow casting can significantly affect the molten steel temperature and the central porosity and segregation of the billet. Summary of the Invention

[0003] To address the aforementioned technical challenges, this application provides a billet continuous casting machine start-up device, which can effectively improve the success rate of continuous casting start-up and reduce the risk of start-up accidents.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a casting device for a round billet continuous casting machine, located inside the crystallizer, characterized in that: it includes a dummy ingot head set inside the copper tube of the crystallizer, a material basket set above the dummy ingot head, the material basket having an circumferential gap with the inner wall of the copper tube of the crystallizer, a refractory mud layer and an iron filings layer set between the material basket and the dummy ingot head, the iron filings layer being located above the refractory mud layer, the refractory mud layer sealing the circumferential gap between the bottom of the material basket and the inner wall of the copper tube of the crystallizer, cold material set inside the material basket, and a connecting member erected vertically inside the material basket, the lower end of the connecting member contacting the bottom of the material basket and the upper end extending beyond the upper opening of the material basket.

[0005] Preferably, the basket is an iron shell with perforations.

[0006] Preferably, the cold material is cold steel bar strips or dried iron filings, and the cold steel bar strips are evenly spread on the iron filings layer.

[0007] Preferably, the distance between the ingot head and the upper opening of the copper tube of the crystallizer is 550mm ± 10mm.

[0008] Compared with the prior art, the advantages of this utility model are as follows: This utility model sets up a material basket for storing cold material, which can prevent the cold material from scratching the inner wall of the copper tube of the crystallizer. The material basket containing cold material is used as a refractory mud layer between the pouring plug and the ingot head. On the one hand, it serves as an isolation layer to prevent the two from sticking together. On the other hand, the refractory mud layer can also be used to seal the bottom of the annular gap between the material basket and the inner wall of the copper tube of the crystallizer to prevent molten steel from flowing through, without the need for a separate sealing rope.

[0009] This invention can effectively reduce steel leakage accidents during continuous casting machine start-up, stabilize production, improve production efficiency, avoid scratching the copper tube wall of the crystallizer by cold steel bars, and protect the equipment. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the casting device for the round billet continuous casting machine in an embodiment of this utility model. Detailed Implementation

[0011] The present invention will be further described in detail below with reference to the accompanying drawings. The embodiments described are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0012] The casting device for the round billet continuous casting machine in this embodiment includes a dummy ingot head 6 installed inside the copper tube 2 of the crystallizer, with the dummy ingot head 6 550mm from the top of the copper tube. A material basket 3, which is a perforated iron shell, is installed above the dummy ingot head 6. Steel cold strips 4 are evenly placed inside the material basket 3. A circumferential gap is maintained between the material basket 3 and the inner wall of the copper tube 2. A refractory clay layer 5 and a scrap layer are installed between the upper and lower layers of the material basket 3 and the dummy ingot head 6, with the scrap layer located above the refractory clay layer 5. The refractory clay layer 5 serves as an isolation layer and seals the circumferential gap between the bottom of the material basket 3 and the inner wall of the copper tube 2. A connector 1 is vertically installed inside the material basket 3, with its lower end contacting the bottom of the material basket and its upper end extending beyond the top of the material basket 3.

[0013] The above-mentioned casting device and corresponding casting method are as follows: The dredger head is placed approximately 550mm from the top of the copper tube in the crystallizer. The dredger sealing device is then constructed sequentially using refractory clay, dried iron filings, an iron shell, cold-rolled steel bars, and connectors. During casting, the stopper is opened to 65% by controlling the opening of the stopper rod. After the molten steel emerges, the flow of molten steel in the crystallizer is observed, and the opening is adjusted accordingly. Vibration begins when the molten steel level rises to approximately 300mm from the top of the copper tube in the crystallizer. When the level rises to 200mm, the casting speed is increased, and protective slag is added promptly. The molten steel level in the crystallizer is controlled. Once the level stabilizes, the automatic control button is activated to switch to automatic level control, and casting is successful.

[0014] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A casting start device for a round billet continuous casting machine, located inside the crystallizer, characterized in that: The device includes a siphon head installed inside a copper tube in a crystallizer. A material basket is installed above the siphon head, and a circumferential gap is left between the material basket and the inner wall of the copper tube in the crystallizer. A refractory mud layer and an iron filings layer are installed between the upper and lower layers of the material basket and the siphon head, with the iron filings layer located above the refractory mud layer. The refractory mud layer seals the circumferential gap between the bottom of the material basket and the inner wall of the copper tube in the crystallizer. Cold material is placed inside the material basket, and a connector is erected vertically inside the material basket. The lower end of the connector contacts the bottom of the material basket, and the upper end extends beyond the top opening of the material basket.

2. The casting start device for a round billet continuous casting machine according to claim 1, characterized in that: The basket is a perforated iron shell.

3. The casting start device for a round billet continuous casting machine according to claim 1, characterized in that: The cold material is a cold-rolled steel bar.

4. The casting start device for a round billet continuous casting machine according to claim 1, characterized in that: The distance between the ingot head and the upper opening of the copper tube of the crystallizer is 550mm ± 10mm.

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