Lightweight electric furnace system

Abstract

A light and simple electric furnace system belongs to the technical field of electric furnace systems, and mainly relates to a furnace system for slag smelting; the invention aims to solve the problems in the prior art that the electric furnace equipment is bulky, a variety of large-scale equipment is required to cooperate in the production process, manpower and material resources are consumed, and the financial burden on the enterprise is heavy; the invention comprises a raw material feeding device and an electric furnace, the electric furnace is a hollow structure with an opening at the upper end, a flow outlet is arranged on the side wall of the electric furnace, a rotary distributor is installed on the upper end of the electric furnace, the raw material feeding device comprises a first feeding device, different raw materials are added in a cyclical and timed manner, and enter a second feeding device after mixing, the feeding device is tilted, and the raw materials mixed at the first feeding device are fed into a kiln head device, and the falling materials at the lower end of the kiln head device are fed into the electric furnace through a rotary distributor for melting; the invention does not require large-scale transportation equipment, which greatly reduces the operating cost of the enterprise.

Description

Technical Field

[0001] The invention discloses a furnace system for slag smelting, belongs to the technical field of electric furnace systems, and mainly relates to a light and simple electric furnace system. Background Art

[0002] Blast furnace slag is a waste formed by non-volatile components in the charge such as gangue in ore, ash in fuel and flux (limestone) during the ironmaking process in blast furnace. It is mainly divided into blast furnace slag and heavy slag. Blast furnace slag is a loose granular material formed by rapid cooling with water when the blast furnace is discharged. It has high activity. At present, this type of slag accounts for about 85% of the total slag. Heavy slag refers to a stone material with large bulk density and block size formed by natural cooling in the air or a very small amount of water to promote its cooling. The main components of blast furnace slag are silicates and aluminates composed of CaO, MgO, Al2O3, MgO, SiO2, MnO, Fe2O3, etc. SiO2 and MnO mainly come from gangue in ore and ash in coke, and CaO and MgO mainly come from flux. The above four main components account for more than 90% of blast furnace slag. Depending on the composition of iron ore, quality of flux, quality of coke and the type of pig iron produced, generally 0.3 to 1.0 ton of waste slag is discharged for every ton of pig iron produced. Therefore, it is also a large-scale and widespread industrial waste slag.

[0003] Since slag contains a variety of reusable components, the reuse of slag has become a demand for energy recycling. In the prior art, slag is usually mixed with other components, smelted into new products, and applied to different fields. The smelting device adopts an electric furnace system with high smelting production efficiency. Due to its application environment, the electric furnace system usually requires huge auxiliary equipment to support it. The equipment is bulky and requires the cooperation of multiple large-scale equipment in the production process, which consumes manpower and material resources and imposes a heavy financial burden on the enterprise. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a light and simplified electric furnace system, which cooperates with a light and simplified feeding part and a light and simplified electric furnace to reduce the cost investment of the enterprise.

[0005] The object of the present invention is achieved in that:

[0006] A light and simple electric furnace system comprises a raw material feeding device and an electric furnace. The electric furnace is a hollow structure with an opening at the upper end. The open end of the electric furnace is sealed by a furnace cover to form a closed smelting chamber. A stream outlet is arranged on the side wall of the electric furnace. A rotary distributor is installed on the upper end of the electric furnace. The raw material feeding device comprises a first feeding device. Different raw materials are added in a cycle at a fixed time and enter a second feeding device after mixing. The feeding device is tilted to feed the raw materials mixed at the first feeding device into a kiln head device. The falling material at the lower end of the kiln head device is fed into the electric furnace through a rotary distributor for melting.

[0007] Furthermore, the electric furnace comprises a shell, an inner furnace body is arranged in the shell, the upper part of the inner furnace body is a first inner wall and a second inner wall surrounded by a heat-insulating brick layer, and the first inner wall and the second inner wall are both frustum-shaped rotating surfaces.

[0008] Furthermore, the top angle of the cone where the first inner wall is located is 60°, the second inner wall is located at the lower part of the first inner wall, the top angle of the cone where the second inner wall is located is 30°, and the diameter of the lower end section of the first inner wall is smaller than the diameter of the upper end section of the second inner wall.

[0009] Furthermore, the rotary distributor includes a base, a turntable is provided at the upper end of the base, the base and the turntable are connected via a rotating shaft, the turntable is driven to rotate on the base via a power component, and the circumferential edge of the upper end surface of the turntable is provided with a distribution component arranged in a uniform array.

[0010] Furthermore, the cloth assembly includes a cloth plate support, a cloth plate, and a cloth plate base. The lower end portion of the cloth plate is embedded in the upper end of the turntable. The cloth plate support is installed on the upper end of the cloth plate and is connected by a rotating shaft that passes through the cloth plate support and the cloth plate from top to bottom. The cloth plate base is installed at a position where the cloth plate support is located outside the turntable. A plurality of stopper wheel bases are provided through the circumferential edge of the base, and one side of the stopper wheel base is connected to the edge of the turntable through a stopper wheel bearing.

[0011] Furthermore, the power assembly includes a rotating motor, a chain is sleeved on the lower end of the turntable, and the output end of the motor is engaged with the chain through a sprocket to drive the turntable to rotate.

[0012] Furthermore, the kiln head device includes a first kiln head silo, a second kiln head silo, an electromagnetic feeder and a central feeder. The electromagnetic feeder is installed at the lower outlet end of the first kiln head silo, the output end of the electromagnetic feeder is located at the upper end of the distributor, the input end of the central feeder is located at the output end of the second kiln head silo, and the output end of the central feeder is located at the upper end of the distributor.

[0013] Furthermore, the center feeder includes a feeding reamer, and the material enters through the input end of the center feeder and is discharged from the output end of the center feeder after passing through the feeding reamer. The output end of the center feeder is located at the center position of the distributor, and the distance between the output end of the center feeder and the output end of the electromagnetic feeder is less than the radius of the distributor.

[0014] Furthermore, the first feeding device includes a first conveyor belt and a raw material hopper located at the upper end of the first conveyor belt and arranged evenly in sequence. The second feeding device includes a high-angle conveyor belt. The material falling from the lower end of the hopper is transported to the mixer via the first conveyor belt for mixing and then falls onto the high-angle conveyor belt of the second feeding device, and is then transported to the input end of the kiln head device via the high-angle conveyor belt.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the structure of the present invention is light and simple, and the first feeding device and the second feeding device are used for coordinated feeding. The raw materials of various components are mixed for the first time at the first feeding device, mixed for the second time at the second feeding device, and mixed for the third time at the kiln head device. The raw materials are evenly mixed and distributed through a rotary distributor, and the raw materials are evenly and fully mixed. Since the raw materials are evenly mixed from the initial position to before entering the circuit, the raw materials react more fully in the circuit. The whole process is regulated by a PLC control system, without the need for extra manual participation, with high safety, and without the application of large-scale lifting equipment, which greatly reduces the operating costs of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall mechanism;

[0017] Figure 2 It is a schematic diagram of the structure of the kiln head device of the present invention;

[0018] Figure 3 yes Figure 2 Left view of

[0019] Figure 4 It is a schematic diagram of the mechanism of the rotary distributor of the present invention;

[0020] Figure 5 yes Figure 4 Schematic diagram of the organization in Part A;

[0021] Figure 6 yes Figure 3 Top view of the . DETAILED DESCRIPTION

[0022] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0023] The light and simple electric furnace 1 system of the present embodiment comprises a raw material feeding device and an electric furnace 1. The electric furnace 1 is a hollow structure with an opening at the upper end. A stream outlet 2 is provided on the side wall of the electric furnace 1. A rotary distributor 3 is installed at the upper end of the electric furnace 1. The raw material feeding device comprises a first feeding device. Different raw materials are added in a cycle and at a fixed time. After mixing, they enter the second feeding device. The feeding device is tilted to feed the raw materials mixed at the first feeding device into the kiln head device. The falling material at the lower end of the kiln head device is fed into the electric furnace 1 through the rotary distributor 3 for melting. The first feeding device includes a first conveyor belt 8 and a first basalt hopper 4, a second basalt hopper 5, a slag hopper 6, and a silica hopper 7 located at the upper end of the first conveyor belt 8 and arranged evenly in sequence. The second feeding device includes a high-angle conveyor belt 9. The material falling from the lower end of the hopper is transported to the mixer 8-1 by the first conveyor belt 8 for mixing and then falls onto the high-angle conveyor belt 9 of the second feeding device. It is then transported to the input end of the kiln head device via the high-angle conveyor belt 9. The first feeding device realizes the supply of raw materials, and the second feeding device completes the transportation of materials.

[0024] The electric furnace 1 comprises a shell, and an inner furnace body is arranged in the shell. In order to evenly disperse the materials falling from the rotary distributor 3 into the electric furnace 1, the upper part of the inner furnace body is a first inner wall 10 and a second inner wall 11 surrounded by a heat-insulating brick layer. The first inner wall 10 and the second inner wall 11 are both frustum-shaped rotating surfaces, so that the materials are evenly spread, and the heat collection effect in the furnace is good, and the heat circulates evenly in the furnace.

[0025] In order to promote the favorable circulation and convergence of heat in the furnace, the top angle of the cone where the first inner wall 10 is located is 60°, the second inner wall 11 is located at the lower part of the first inner wall 10, the top angle of the cone where the second inner wall 11 is located is 30°, and the diameter of the lower end section of the first inner wall 10 is smaller than the diameter of the upper end section of the second inner wall 11.

[0026] In order to spread the material evenly, a rotary distributor 3 is used for even distribution. The rotary distributor 3 includes a base 12. A turntable 14 is provided at the upper end of the base 12. The base 12 is connected to the turntable through a rotating shaft 13. The turntable 14 is driven to rotate on the base 12 by a power component. The power component includes a rotating motor 15. A chain 16 is provided at the lower end of the turntable 14. The output end of the motor 15 engages with the chain 16 through a sprocket 17 to drive the turntable to rotate.

[0027] The circumferential edge of the upper end surface of the turntable is provided with a cloth component arranged in a uniform array, and the cloth component includes a cloth plate support 18, a cloth plate 19, and a cloth plate base 20. The lower end portion of the cloth plate 19 is embedded in the upper end of the turntable 14, the cloth plate support 18 is installed on the upper end of the cloth plate 19 and is connected by a rotating shaft 21 that passes through the cloth plate support 18 and the cloth plate 19 from top to bottom, and the cloth plate base 20 is installed at the position of the cloth plate support 18 located on the outside of the turntable 16, and a plurality of stopper wheel bases 22 are provided through the circumferential edge of the base 12, and one side of the stopper wheel base 22 is connected to the edge of the turntable 16 through a stopper wheel bearing 23.

[0028] The kiln head device of the present embodiment includes a kiln head frame 24, the upper end of the kiln head frame 24 is a material input end, an adjustment plate 25 and a first kiln head silo 26 and a second kiln head silo 27 are arranged from top to bottom in the kiln head frame 24, an electromagnetic feeder 28 is installed at the lower end outlet of the first kiln head silo 26, the output end of the electromagnetic feeder 28 is located at the upper end of the distributor, the input end of the central feeder 29 is located at the output end of the second kiln head silo 27, and the output end of the central feeder 29 is located at the upper end of the rotary distributor, an adjustment shaft 30 is provided on one side of the adjustment plate 25, both ends of the adjustment shaft 30 are hinged at both ends of the kiln head frame 24, one end of the adjustment shaft extends out of the kiln head frame 24 and is connected to an adjustment wrench 31, an arc-shaped limit strip 32 is provided on the outer wall of the kiln head frame 24, the adjustment wrench 31 is fixed on the arc-shaped limit strip 32 by screws, and the offset angle of the adjustment plate 25 is adjusted by adjusting the angle of the adjustment wrench.

[0029] The central feeder 29 includes a feeding reamer 33. The material enters through the input end of the central feeder 29 and is discharged from the output end of the central feeder after passing through the feeding reamer, thereby further mixing the material and achieving the purpose of uniform spreading. The output end of the central feeder is located at the center of the distributor, and the distance between the output end of the central feeder and the output end of the electromagnetic feeder 28 is less than the radius of the distributor.

[0030] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A light and simple electric furnace system, including a raw material feeding device and an electric furnace, characterized in that: The electric furnace is a hollow structure with an opening at the upper end. A stream outlet is provided on the side wall of the electric furnace. A rotary distributor is installed at the upper end of the electric furnace. The raw material feeding device includes a first feeding device. Different raw materials are added in a cycle and timed manner, and enter the second feeding device after mixing. The inclined feeding device feeds the raw materials mixed at the first feeding device into the kiln head device. The falling materials at the lower end of the kiln head device are fed into the electric furnace through the rotary distributor for melting; the first feeding device includes a first conveyor belt and a first basalt hopper, a second basalt hopper, a slag hopper, and a silica hopper located at the upper end of the first conveyor belt and arranged uniformly in sequence. The second feeding device includes a high-angle conveyor belt. The falling materials at the lower end of the hopper are transported to the mixer by the first conveyor belt for mixing, and then fall onto the high-angle conveyor belt of the second feeding device, and then are transported to the input end of the kiln head device via the high-angle conveyor belt. The first feeding device realizes the supply of raw materials, and the second feeding device completes the transportation of materials. The electric furnace comprises a shell, an inner furnace body is arranged in the shell, the upper part of the inner furnace body is a first inner wall and a second inner wall surrounded by a heat-insulating brick layer, and the first inner wall and the second inner wall are both frustum-shaped rotating surfaces; The apex angle of the cone where the first inner wall is located is 60°, the second inner wall is located at the lower part of the first inner wall, the apex angle of the cone where the second inner wall is located is 30°, and the diameter of the lower end section of the first inner wall is smaller than the diameter of the upper end section of the second inner wall; A rotary distributor is used for uniform distribution of materials. The rotary distributor includes a base, a turntable is provided at the upper end of the base, the base and the turntable are connected by a rotating shaft, and the turntable is driven to rotate on the base by a power assembly. The power assembly includes a rotary motor, a chain is provided at the lower end of the turntable, and the output end of the motor drives the turntable to rotate through a sprocket engaged with the chain; The circumferential edge of the upper end surface of the turntable is provided with a cloth assembly arranged in a uniform array, the cloth assembly includes a cloth plate support, a cloth plate, and a cloth plate base, the lower end portion of the cloth plate is embedded in the upper end of the turntable, the cloth plate support is installed on the upper end of the cloth plate and is connected by a rotating shaft passing through the cloth plate support and the cloth plate from top to bottom, the cloth plate base is installed at the position of the cloth plate support located outside the turntable, and a plurality of stopper wheel bases are provided through the circumferential edge of the base, and one side of the stopper wheel base is connected to the edge of the turntable through a stopper wheel bearing; The kiln head device comprises a kiln head frame, the upper end of the kiln head frame is a material input end, an adjustment plate and a first kiln head silo and a second kiln head silo are arranged from top to bottom in the kiln head frame, an electromagnetic feeder is installed at the lower end outlet of the first kiln head silo, the output end of the electromagnetic feeder is located at the upper end of the distributor, the input end of the central feeder is located at the output end of the second kiln head silo, the output end of the central feeder is located at the upper end of the rotary distributor, an adjustment shaft is provided on one side of the adjustment plate, both ends of the adjustment shaft are hinged at both ends of the kiln head frame, one end of the adjustment shaft extends out of the kiln head frame and is connected to an adjustment wrench, an arc-shaped limit strip is provided on the outer wall of the kiln head frame, the adjustment wrench is fixed on the arc-shaped limit strip by screws, and the offset angle of the adjustment plate is adjusted by adjusting the angle of the adjustment wrench; The center feeder includes a feeding reamer. The material enters through the input end of the center feeder and is discharged from the output end of the center feeder after passing through the feeding reamer. The output end of the center feeder is located at the center position of the distributor. The distance between the output end of the center feeder and the output end of the electromagnetic feeder is less than the radius of the distributor.

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