Ferrovanadium smelting furnace baking device

Abstract

The present invention relates to a baking device for a vanadium-iron smelting furnace, and belongs to the technical field of metallurgical equipment. The device comprises a baking room (1), a rope lifting device (2), and a baking cover (7). The baking room (1) is a closable hollow structure. The baking cover (7) is arranged in the baking room (1) through the rope lifting device (2). The baking cover (7) moves vertically up and down, and a plurality of heating elements (8) are arranged on the baking cover (7). The baking cover (7) of the device can be equipped with heating elements such as gas, fuel oil, and electric heating according to actual needs. The baking cover (7) can be lifted vertically, and has a simple structure and is easy to repair and maintain. It can efficiently collect smoke and dust emitted during the baking process, reduce heat loss, improve heating efficiency, and reduce energy consumption. The device solves the equipment defects in the baking process of the existing vanadium-iron smelting furnace, such as unstable equipment operation, inconvenient repair and maintenance, and the presence of multiple safety hazards.

Description

Technical Field

[0001] The invention relates to a baking device for a ferrovanadium smelting furnace and belongs to the technical field of metallurgical equipment. Background Art

[0002] During the vanadium-ferrometallurgical smelting process, refractory materials need to be poured, built, and knotted inside the smelting furnace body as a lining to prevent the metal furnace body from burning. Currently, domestic and foreign vanadium-ferrometallurgical smelting companies all use refractory bricks to build the furnace lining, which is then supplemented by knotting the surface of the refractory material. The knotting material is a uniform mixture of magnesia sand, magnesia fire clay, and brine. There is a certain amount of free water and crystallized water in the furnace lining, and the furnace lining needs to be baked and dried before smelting.

[0003] There are two main baking methods used by domestic and foreign ferrovanadium smelting enterprises: one is to use gas nozzles to spray gas into the furnace body to achieve baking and drying; the other is to use electric heating elements to heat the furnace body to achieve baking and drying. Gas baking uses a gas nozzle installed on a fixed or flippable baking cover. However, due to the limited installation method of the baking cover, the gas nozzle can only be located above the furnace body and cannot penetrate deep into the furnace body to the bottom of the furnace lining. This leads to low baking efficiency and uneven heating, which can easily cause problems such as knotted materials and cracking. Electric baking, on the other hand, can extend the heating element deep into the furnace body, but the baking cover must be raised to a certain height when the furnace body enters and exits the baking station. The current method used by companies is to hang the baking cover on an undercarriage, relying on mechanical transmission methods such as rack and pinion to drive the baking cover vertically to ensure safe entry and exit of the furnace body. However, the weight of the lifting arm of the undercarriage and the weight of the baking cover including the heating element require counterweights to maintain the baking cover in a suspended position and reduce the transmission load. This relatively complex structure requires high precision coordination. Furthermore, due to the high temperature and high corrosion environment inherent in the baking operation, the metal structure and transmission components of the equipment are rapidly corroded and fatigued, resulting in unstable operation, long maintenance time and high costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that during the baking process of the existing ferrovanadium smelting furnace, the equipment operation is unstable, the inspection and maintenance are inconvenient, and there are multiple safety hazards.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a baking device for a vanadium-ferro smelting furnace, including a baking room, a rope lifting device, and a baking cover. The baking room is a closable hollow structure. The baking cover is arranged in the baking room through the rope lifting device. The baking cover moves vertically up and down, and a plurality of heating elements are arranged on the baking cover.

[0006] Wherein, a sliding door with a slide rail is provided on one side wall of the baking room in the above device.

[0007] Wherein, the rope lifting device in the above device is an electric hoist, and is arranged on the top of the baking room.

[0008] Wherein, a movable pulley is provided at the middle part of the upper end of the baking cover in the above device, and the baking cover is connected to the rope lifting device through the movable pulley.

[0009] Wherein, the baking cover plate in the above device is provided with a smoke exhaust hole.

[0010] The above device further comprises a baking flat car, which comprises a fixed frame and a driving wheel, and the driving wheel is arranged on the lower end surface of the fixed frame.

[0011] Furthermore, a sway-stopping tube is sleeved on the outer side of the vertical section of the steel rope of the rope lifting device in the above device.

[0012] Wherein, the heating element in the above device is a silicon carbon rod, and a ceramic sleeve is provided on the side wall of the end connected to the baking cover.

[0013] Wherein, the upper part or the upper side wall of the baking room in the above device is provided with a smoke collection pipe installation hole and a smoke and temperature sensor.

[0014] The beneficial effects of the present invention are as follows: the baking cover and furnace body of this baking device form a sealed heating chamber, which is insulated by knotted and cast refractory materials. The baking chamber and the door form a smoke and dust collection space, effectively collecting smoke and dust and further controlling heat loss. The electrically powered baking cart for entering and exiting the baking chamber, the electrically powered door, and the lifting equipment on the baking chamber's roof collectively meet the baking needs of the ferrovanadium smelting furnace, while also achieving smoke and dust collection and automated operation. Furthermore, this device is not limited by the size and weight of the ferrovanadium smelting furnace, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the device of the present invention;

[0016] Figure 2 It is a schematic diagram of the front view structure of the present invention;

[0017] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0018] Figure 4 This is a structural schematic diagram of a baking flat car according to the present invention;

[0019] Figure 5 This is a structural schematic diagram of the baking cover plate of the present invention.

[0020] Figure numerals: 1 is a baking room, 2 is a rope lifting device, 21 is a steel rope, 3 is a sliding door, 4 is a baking flat car, 41 is a fixed frame, 42 is a driving wheel, 43 is a sprocket, 44 is an auxiliary wheel, 5 is a furnace body, 6 is a swing-stop pipe, 7 is a baking cover, 71 is a mounting hole, 72 is a smoke exhaust hole, and 8 is a heating element. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 5 As shown, the baking device for a ferrovanadium smelting furnace of the present invention comprises a baking chamber 1, a rope lifting device 2, and a baking cover 7. The baking chamber 1 is a closable hollow structure. The baking cover 7 is arranged inside the baking chamber 1 via the rope lifting device 2, and moves vertically up and down. The baking cover 7 is provided with a plurality of heating elements 8. It will be understood by those skilled in the art that the baking chamber 1 of this device is constructed of concrete for the main body of the baking chamber 1, and the rope lifting device 2 and exhaust pipe are provided within the baking chamber 1. Furthermore, to facilitate the transportation of the furnace body 5, the baking chamber 1 is an unclosable hollow structure, that is, a door is provided on the side wall. To meet the baking needs of furnace bodies 5 at different heights, the present device preferably has a baking cover 7 disposed within the baking chamber 1 via a rope lifting device 2 to ensure vertical movement of the baking cover 7. Several heating elements 8 are also provided on the baking cover 7. During actual use, the furnace body 5 is placed at the lower end of the baking cover 7, and the heating elements 8 are placed within the furnace body 5 via the rope lifting device 2. The baking cover 7 is then placed directly on the furnace body 5, and the heating elements 8 are used to bake the furnace body 5. The use of the rope lifting device 2 allows for a quick and sealed connection between the baking cover 7 and the furnace body 5, while maintaining a simple structure. The rope lifting device 2 of the present device can be configured to shorten or lengthen the rope by winding or extending the steel rope 21, and its structure is not fixed. In practice, a refractory material may be provided on the inner side of the baking cover 7 so that the baking cover 7 is lowered to cover the smelting furnace being baked. The baking cover 7 and the furnace body 5 being baked form a closed heating chamber. The refractory insulation layer on the baking cover 7 and the furnace lining provide good insulation, effectively controlling the temperature inside the baking room 1. The heating element 8 may be one or more of gas, oil, or electric heating.

[0023] Preferably, a sliding door 3 with slide rails is provided on one side wall of the baking chamber 1 in the above-described device. Those skilled in the art will appreciate that, to facilitate entry and exit of the furnace body 5, this device preferably includes a sliding door 3 with slide rails on one side wall of the baking chamber 1. Furthermore, for ease of use, this device preferably employs an electrically operated sliding door 3. The sliding door 3 seals the baking chamber 1, forming a smoke and dust collection hood and effectively reducing heat loss from external air convection and radiant heat transfer within the smelting furnace body 5.

[0024] Preferably, the rope lifting device 2 in the above device is an electric hoist and is installed on the top of the baking room 1. Those skilled in the art will understand that, in order to reduce costs, the rope lifting device 2 of this device is preferably an electric hoist, and the electric hoist can be installed on the top of the baking room 1. In practice, the electric hoist is connected and fixed to the top surface of the baking room 1, and one end of the steel rope 21 is fixed to the middle of the baking cover 7.

[0025] Preferably, in the above device, a movable pulley is provided at the middle of the upper end of the baking cover 7, and the baking cover 7 is connected to the rope lifting device 2 via the movable pulley. It will be understood by those skilled in the art that in order to save effort in lifting the baking cover 7, the present device preferably provides a movable pulley at the middle of the upper end of the baking cover 7, specifically, the baking cover 7 is connected to the rope lifting device 2 via the movable pulley.

[0026] Preferably, the baking cover plate 7 in the above device is provided with a smoke exhaust hole 72. Those skilled in the art will appreciate that, in order to facilitate baking and smoke exhaust, the present device is preferably provided with a smoke exhaust hole 72 on the baking cover plate 7.

[0027] Preferably, the above device further includes a baking cart 4, which includes a fixed frame 41 and a driving wheel 42, and the driving wheel 42 is arranged on the lower end surface of the fixed frame 41. Those skilled in the art will understand that in order to facilitate the transportation of the furnace body 5, the present device preferably also includes a baking cart 4, and further preferably the baking cart 4 includes a fixed frame 41 and a driving wheel 42, and the driving wheel 42 is arranged on the lower end surface of the fixed frame 41. The entire baking cart 4 is driven to move by the movement of the driving wheel 42. An auxiliary wheel 44 can be preferably provided at the lower end of the fixed frame 41 to maintain the balance of the baking cart 4, and a sprocket 43 is selected to connect the baking cart 4 to extend the life of the device.

[0028] Preferably, a sway-stopping tube 6 is sleeved on the outside of the vertical section of the steel rope 21 of the rope lifting device 2 in the above-mentioned device. It can be understood by those skilled in the art that in order to prevent the baking cover 7 from swinging left and right during the hoisting process, causing impact and damage to the lining of the furnace body 5, the present device preferably sleeves the sway-stopping tube 6 on the outside of the vertical section of the steel rope 21 of the rope lifting device 2. The purpose of the sway-stopping tube 6 is to limit the left and right swing of the steel rope 21. Therefore, in practice, only the sway-stopping tube 6 needs to be fixed. In practice, the end of the sway-stopping tube 6 can be fixed to the lower end side wall of the rope lifting device 2 or the sway-stopping tube 6 can be kept vertically fixed and connected to the inner wall of the baking room 1 through a connecting rod.

[0029] Preferably, the heating element 8 in the above device is a silicon carbide rod, and a ceramic sleeve is provided on the side wall of the end connected to the baking cover 7. It will be understood by those skilled in the art that the heating element 8 of this device is preferably a silicon carbide rod, and is composed of 4 groups of 16 silicon carbide rods, with a total power of 100KW. The installation of the silicon carbide rod requires the installation of a ceramic sleeve near the metal part of the baking cover 7 to prevent short circuits, and the installation length is adjusted according to the depth of the smelting furnace and the heating requirements.

[0030] Preferably, the baking room 1 in the above-mentioned device is provided with a smoke collection duct mounting hole and a smoke and temperature sensor on the upper portion or side wall. Those skilled in the art will appreciate that, in order to facilitate the baking temperature and smoke sensors to collect relevant data, the smoke collection duct mounting hole and the smoke and temperature sensor are provided on the upper portion or side wall of the baking room 1, and are used to collect smoke generated during baking of the smelting furnace body 5 and further provide thermal insulation.

[0031] How to use this device:

[0032] In the first step, the oven body 5 to be baked is placed on the baking flat car 4 outside the baking room 1. The baking flat car 4 drives the driving wheel 42 by its own travel reduction motor to move the oven body 5 to a fixed position in the baking room 1;

[0033] In the second step, the rope lifting device on the top of the baking room 1 lowers the baking cover 7 to cover the furnace body 5. The cast heat-insulating refractory material on the baking cover 7 and the furnace lining of the furnace body 5 form a closed heating chamber. After the heating is turned on, the heating temperature is ≥ 700°C;

[0034] The third step is to close the sliding door 3 of the baking room 1 to form a sealed smoke and dust collection space in the baking room 1. The insulation layer of the baking room 1 and the door is used to reduce the heat loss during baking. The PLC controls the smoke and dust collection wind speed through data collected by the sensor to maintain a low negative pressure state and a high temperature in the baking room 1.

[0035] In the fourth step, after the baking time and temperature meet the standards, the PLC controls the heating element 8 to shut down, increases the smoke collection wind speed, and opens the baking room 1 door after the sensor data shows that the smoke concentration meets the standards. Then, the baking cover 7 is raised to a safe position and hovered. The baking flat car 4 moves the furnace body 5 outside the baking room 1.

Claims

1. The baking device of ferrovanadium smelting furnace is characterized by: The invention comprises a baking room (1), a rope lifting device (2), and a baking cover (7), wherein the baking room (1) is a closable hollow structure, the baking cover (7) is arranged in the baking room (1) through the rope lifting device (2), the baking cover (7) moves vertically up and down, and a plurality of heating elements (8) are arranged on the baking cover (7); a sliding door (3) with a slide rail is arranged on one side wall of the baking room (1); the rope lifting device (2) is an electric hoist and is arranged on the top of the baking room (1); and the baking flat car (4) is also included, and the baking flat car (4) comprises a fixed frame (41) and a driving wheel ( 42), the driving wheel (42) is arranged on the lower end surface of the fixed frame (41); a sway-stopping tube (6) is sleeved on the outer side of the vertical section of the steel rope (21) of the rope lifting device (2); a movable pulley is arranged at the middle part of the upper end of the baking cover (7), and the baking cover (7) is connected to the rope lifting device (2) through the movable pulley; a smoke exhaust hole (72) is arranged on the baking cover (7); the heating element (8) is a silicon carbon rod, and a ceramic sleeve is arranged on the side wall of the connection end with the baking cover (7); a smoke collection pipe installation hole and a smoke and temperature sensor are arranged on the upper part or above the side wall of the baking room (1).

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