Water cooling device for discharge hole of direct-current electric arc furnace

Abstract

The utility model discloses an innovative water cooling device for a discharge hole of a direct-current electric arc furnace. According to the specific technical scheme, the cooling device mainly comprises a discharging opening water cooling cavity, a water cooling water stop sheet, a cooling water outlet and a cooling water inlet. Wherein the discharge hole water-cooling cavity is designed to be a cavity covering the outside of the direct-current electric arc furnace shell, and the interior of the discharge hole water-cooling cavity is separated by a water-cooling water-stop sheet to form independent water inlet and water outlet channels which are respectively connected with the cooling water inlet and the cooling water outlet. According to the device, a strong water cooling system is designed on the outer side of the furnace shell, so that the discharge port is effectively cooled, and the application defects that the service life of a furnace lining is shortened, the furnace shell is burnt and the like due to overhigh local temperature are overcome. The water cooling device is compact in structure and convenient to operate, is composed of the discharge port water cooling cavity, the water cooling water stop sheet, the cooling water outlet, the water inlet and the like, and can remarkably prolong the service life of the refractory material, eliminate the redness phenomenon of the furnace shell and improve the production safety and economical efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of DC arc furnaces, and particularly relates to a water-cooling device for the discharge port of a DC arc furnace. Background Technique

[0002] As an efficient smelting equipment, the DC arc furnace plays a crucial role in the pyrometallurgical process of industrial solid waste and complex materials due to its unique smelting process and wide application range. It can not only realize the comprehensive utilization of high-value-added materials but also harmlessly treat pollutants, which is of great significance for promoting green smelting and sustainable development.

[0003] However, in the actual application process, the DC arc furnace faces some technical challenges. Due to the complex composition and high temperature of industrial solid waste materials, combined with the intense electrochemical reactions and mass and energy exchanges during the smelting process, the discharge port of the DC arc furnace is often troubled by high-temperature erosion. Specifically, the local temperature of the furnace shell is too high, resulting in damage to the mechanical strength and chemical properties of the furnace shell and the furnace lining. Such a high-temperature environment not only shortens the service life of the furnace lining but also easily causes safety accidents such as furnace penetration, bringing serious safety hazards to production.

[0004] In addition, frequent refractory replacement not only increases production costs but also reduces the production capacity and economy of the DC arc furnace. Therefore, how to effectively solve the problem of high-temperature erosion at the discharge port of the DC arc furnace, extend the service life of the furnace lining, and ensure the safety and economy of production has become a technical problem urgently to be solved in the industry. Summary of the Invention

[0005] In view of the existing problems, the utility model provides a water-cooling device for the discharge port of a DC arc furnace. The device aims to solve a series of problems caused by high temperature at the discharge port of the DC arc furnace through effective cooling treatment, extend the service life of the furnace lining, eliminate the phenomenon of excessive furnace shell temperature, improve the safety and economy of equipment use, and provide a strong guarantee for the efficient and stable operation of the DC arc furnace.

[0006] The specific technical solution of the utility model is as follows.

[0007] A water-cooling device for the discharge port of a DC arc furnace includes a water-cooling cavity for the discharge port, a water-cooling partition plate, a cooling water outlet, and a cooling water inlet; the water-cooling cavity for the discharge port is a cavity wrapped outside the furnace shell of the DC arc furnace, and is internally separated by the water-cooling partition plate, and the cooling water outlet and the cooling water inlet are respectively arranged on both sides of the water-cooling partition plate.

[0008] The cooling water outlet and the cooling water inlet are arranged at the same horizontal height.

[0009] The cooling water outlet is communicated with a cooling water collecting pool.

[0010] The water-cooled chamber at the discharge port wraps around the entire circumference of the DC arc furnace body and the outside of the discharge port of the DC arc furnace.

[0011] One or more of the water-cooling devices are provided on the DC arc furnace body, specifically at positions where the local temperature is too high.

[0012] A flow-limiting plate is provided inside the water-cooled chamber at the discharge port to control the liquid flow rate.

[0013] The utility model has the following beneficial effects:

[0014] 1. High-efficiency cooling: By providing a strong water-cooling device on the outside of the furnace shell, the discharge port is directly cooled, effectively solving the problem of excessive local temperature.

[0015] Simple structure: The device is designed compactly, facilitating installation and maintenance, and reducing the transformation cost.

[0016] Long service life: Significantly improves the service life of the refractory material, reduces the damage of the furnace lining caused by high-temperature erosion, and extends the overall service life of the DC arc furnace.

[0017] Wide applicability: The device can be provided with one or more at different positions of the DC arc furnace according to actual needs, flexibly coping with local high-temperature points.

[0018] Improved safety: Eliminates the phenomenon of the furnace shell turning red, reduces the risk of safety accidents such as furnace penetration, and improves production safety. Description of the drawings

[0019] Figure 1 It is a schematic structural diagram of a water-cooling device for the discharge port of a DC arc furnace provided by the utility model. Detailed implementation manners

[0020] As Figure 1 shown, a water-cooling device for the discharge port of a DC arc furnace includes a water-cooled chamber 1 at the discharge port of the DC arc furnace, a water-cooling partition plate 2, a cooling water outlet 3, a discharge port 4 of the DC arc furnace, a cooling water inlet 5, and a DC arc furnace body 6.

[0021] The water-cooled chamber 1 at the discharge port of the DC arc furnace: A water-cooled chamber for the discharge port of the DC arc furnace.

[0022] The water-cooling partition plate 2: A plate for isolating the inlet and return water of the water-cooled chamber at the discharge port.

[0023] The cooling water outlet 3: The cooling water outlet of the water-cooled chamber at the discharge port.

[0024] The discharge port 4 of the DC arc furnace: The discharge port for the high-temperature molten liquid in the DC arc furnace smelting.

[0025] The cooling water inlet 5: The cooling water inlet of the water-cooled cavity at the discharge port.

[0026] The direct current arc furnace body 6: The container device for high-melting solution smelting in a direct current arc furnace.

[0027] The water-cooled cavity 1 at the discharge port of the direct current arc furnace is welded around the direct current arc furnace body 6 and outside the discharge port 4 of the direct current arc furnace.

[0028] The water-cooled partition plate 2 separates the inlet and outlet water of the water-cooled cavity 1 at the discharge port of the direct current arc furnace.

[0029] The cooling water inlet 5 is the cooling water inlet. Cooling water enters the water-cooled cavity 1 at the discharge port of the direct current arc furnace from here, cools down the discharge port 4 of the direct current arc furnace, and the cooling water is discharged back to the cooling water collecting pool from the cooling water outlet 3.

[0030] A water-cooling device for the discharge port of a direct current arc furnace provided by the present utility model has been directly applied and verified in the direct current arc furnace project of our company. This device completely solves the problems such as local overheating of the discharge port of the direct current arc furnace due to lack of cooling, reduction of the service life of the furnace lining refractory material, and out-of-control furnace penetration caused by the reduction of the furnace body structure strength. It also solves the problems of insufficient service life of the discharge port and the risk of easily causing safety production accidents when smelting high-temperature and difficult-to-melt furnace materials in the direct current arc furnace. This water-cooling device for the discharge port has the characteristics of simple structure, low cost, and long service life, and can provide certain key data support for the research on the process optimization of the electric furnace smelting process and the improvement of the service life and safety of the electric furnace discharge port, and has broad promotion prospects and application value in the direct current arc furnace.

[0031] The above description is only a preferred embodiment of the present utility model and does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with a preferred embodiment, it is not intended to limit the present utility model. Any simple modification made by any person skilled in the art to the above embodiments based on the technical essence of the present utility model within the scope of the technical solution of the present utility model still belongs to the technical scope of the present utility model.

Claims

1. A water cooling device for a discharge port of a DC electric arc furnace, characterized in that: The invention comprises a discharge port water cooling chamber (1), a water cooling baffle (2), a cooling water outlet (3), and a cooling water inlet (5); the discharge port water cooling chamber (1) is a chamber covering the outside of a DC electric arc furnace shell, the interior of which is divided by the water cooling baffle (2), and the cooling water outlet (3) and the cooling water inlet (5) are respectively arranged on both sides of the water cooling baffle (2).

2. A DC arc furnace discharge port water cooling device according to claim 1, characterized in that: The cooling water outlet (3) and the cooling water inlet (5) are arranged at the same level.

3. A DC arc furnace discharge port water cooling device according to claim 1, characterized in that: The cooling water outlet (3) is in communication with a cooling water collecting tank.

4. A DC arc furnace discharge port water cooling device according to claim 1, characterized in that: The discharge port water cooling chamber (1) covers a circumference of the DC electric arc furnace body (6) and the outside of the DC electric arc furnace discharge port (4).

5. A DC arc furnace discharge port water cooling device according to claim 1, characterized in that: One or more water cooling devices are arranged on the DC arc furnace body (6), specifically at locations where the local temperature is too high.

6. A DC arc furnace discharge port water cooling device according to claim 1, characterized in that: A flow limiting plate is arranged inside the discharge port water cooling chamber (1) to control the flow rate of the liquid.

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