Novel high-efficiency six-electrode submerged arc furnace

Abstract

The utility model discloses a novel high-efficiency six-electrode submerged arc furnace which comprises a plant, a furnace body bearing table fixedly installed in the plant, a submerged arc furnace body fixedly installed on the furnace body bearing table, a holder system installed on the submerged arc furnace body, a smoke exhaust system installed on the submerged arc furnace body, a transformer installed on the plant, and a control system installed on the transformer. And a plurality of electrodes are mounted on the transformer. Traditional three electrodes are replaced by six electrodes, the diameter of a distribution circle of the electrodes is not changed, the hydraulic rod and the short net rack are matched to drive the motor to ascend and descend, the ascending and descending speed of the electrodes is increased, the total power is not changed, new heating is more uniform, the natural power factor of a system of the submerged arc furnace is higher, the efficiency of a transformer is effectively improved, and the service life of the transformer is prolonged. Meanwhile, due to the fact that manual control of the electrodes and the process and electric power imbalance of stacking are reduced, the power factor of a short network is effectively improved, the power grid imbalance is reduced, the energy consumption is reduced, and the smelting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of submerged arc furnaces, in particular to a novel high-efficiency six-electrode submerged arc furnace. Background Art

[0002] Submerged arc furnace is also called arc furnace or resistance furnace, also called reduction furnace or submerged arc furnace. One end of the electrode is buried in the material layer, an arc is formed in the material layer and the material is heated by the material layer's own resistance. It is often used to smelt ferroalloys (see ferroalloy furnace), smelt matte nickel, matte copper (see nickel, copper), and produce calcium carbide (calcium carbide). It is mainly used for reducing smelting ore, carbonaceous reducing agent and solvent and other raw materials. It mainly produces ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloy and other ferroalloys, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. Its working characteristics are that it uses carbon or magnesium refractory materials as furnace lining and uses self-training graphite electrodes. The electrode is inserted into the charge for submerged arc operation, and the energy of the arc and the current passing through the charge due to the resistance of the charge is used to generate energy to melt the metal, and the charge is continuously added, and the iron slag is discharged intermittently. It is an industrial electric furnace with continuous operation.

[0003] 70% of the system reactance of the ore-fired furnace is generated by the short-circuit system, and the loss of the short-circuit accounts for more than 70% of the system's own loss. The short-circuit is a system that works with a large current, and the maximum current can reach tens of thousands of amperes. Therefore, the performance of the short-circuit determines the performance of the ore-fired furnace to a large extent. Since the inductive reactance of the short-circuit accounts for more than 70% of the entire system, the inductive reactance of the short-circuit system of the high-smoke hood open furnace, the low-smoke hood semi-enclosed furnace or the fully enclosed furnace is relatively large. For this reason, it is difficult for the natural power factor of the ore-fired furnace to reach more than 0.85. The natural power factor of most furnaces is between 0.7 and 0.8. The low power factor not only reduces the efficiency of the transformer, consumes a lot of useless work, wastes a lot of electricity, and is charged an additional power penalty by the power department. At the same time, due to the manual control of the electrode and the stacking process, the power imbalance between the three phases increases, and the maximum imbalance can reach more than 20%, which leads to low smelting efficiency and increased electricity costs. In this regard, we have proposed a new type of high-efficiency six-electrode ore-fired furnace to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of high-efficiency six-electrode ore-fired furnace to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a new high-efficiency six-electrode ore-fired furnace, comprising:

[0006] A factory building, wherein a furnace body load-bearing platform is fixedly installed in the factory building, a mineral heating furnace body is fixedly installed on the furnace body load-bearing platform, a holding device system is installed on the mineral heating furnace body, a smoke exhaust system is installed on the mineral heating furnace body, a transformer is installed on the factory building, a plurality of electrodes are installed on the transformer, the number of the electrodes is six, and the six electrodes are equidistantly distributed in a ring, a hydraulic rod is installed above the electrode in the factory building, a short grid is fixedly installed on the bottom end of the hydraulic rod, and the six electrodes are fixedly installed in the short grid.

[0007] Preferably, the plant is located on one side of the ore-fired furnace body and has a water cooling system fixedly installed therein, and a furnace ignition machine is provided in the plant.

[0008] Preferably, the factory building is located above the ore-fired furnace body and a crane is fixedly installed thereon.

[0009] Preferably, the plant is provided with a discharge system on one side of the ore-fired furnace body.

[0010] Preferably, a double-beam overhead crane is fixedly installed in the factory building.

[0011] Preferably, a smoke exhaust pipe is fixedly installed on the factory building.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model replaces the traditional three electrodes with six electrodes, and the diameter of the electrode distribution circle remains unchanged. The motor is driven to rise and fall through the cooperation of the hydraulic rod and the short grid frame, thereby improving the lifting speed of the electrode, while the total power remains unchanged. The new heating is more uniform, and the natural power factor of the system of the ore-heating furnace will be higher, which effectively improves the efficiency of the transformer, reduces useless work, and saves a lot of electric energy. At the same time, due to the manual control of the electrodes and the stacking process, the power imbalance is reduced compared with the original three electrodes, which effectively improves the power factor of the short grid, reduces the imbalance of the power grid, reduces energy consumption, and improves the smelting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of a new type of high-efficiency six-electrode ore-fired furnace proposed by the utility model;

[0015] Figure 2 This is a side view structural diagram of the electrode distribution in a new type of high-efficiency six-electrode ore-fired furnace proposed by the utility model.

[0016] In the figure: 1. Factory building; 2. Water cooling system; 3. Short grid; 4. Smoke exhaust system; 5. Handling system; 6. Submersible arc furnace body; 7. Hydraulic rod; 8. Furnace ignition machine; 9. Discharging system; 10. Double-beam hanging crane; 11. Transformer; 12. Crane; 13. Electrode; 14. Smoke exhaust pipe; 15. Furnace body load-bearing platform. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-2 The utility model provides a technical solution: a new high-efficiency six-electrode ore-fired furnace, comprising:

[0019] A factory building 1, wherein a furnace body load-bearing platform 15 is fixedly installed in the factory building 1, a mineral heat furnace body 6 is fixedly installed on the furnace body load-bearing platform 15, a gripper system 5 is installed on the mineral heat furnace body 6, a smoke exhaust system 4 is installed on the mineral heat furnace body 6, a transformer 11 is installed on the factory building 1, a plurality of electrodes 13 are installed on the transformer 11, the number of the electrodes 13 is six, and the six electrodes 13 are equidistantly distributed in a ring, a hydraulic rod 7 is installed above the electrode 13 in the factory building 1, a short grid 3 is fixedly installed on the bottom end of the hydraulic rod 7, and the six electrodes 13 are all fixedly installed in the short grid 3.

[0020] The plant 1 is located on one side of the ore-fired furnace body 6 and a water cooling system 2 is fixedly installed thereon. A furnace ignition machine 8 is arranged in the plant 1 .

[0021] The plant 1 is located above the ore-fired furnace body 6 and is fixedly equipped with a crane 12 , which is used to feed the ore-fired furnace body 6 .

[0022] The plant 1 is provided with a discharging system 9 on one side of the ore-fired furnace body 6, and the discharging system 9 is used for discharging materials.

[0023] A double-beam crane 10 is fixedly installed in the factory building 1 , and the double-beam crane 10 is used to transport processed materials out of the factory building 1 .

[0024] A smoke exhaust pipe 14 is fixedly installed on the factory building 1 , and the smoke exhaust pipe 14 is convenient for exhausting smoke out of the factory building 1 .

[0025] Working principle: The utility model replaces the traditional three electrodes 13 with six electrodes 13, and the distribution circle diameter of the electrode 13 remains unchanged. The motor 13 is driven to rise and fall through the cooperation of the hydraulic rod 7 and the short grid 13, thereby increasing the lifting speed of the electrode 13, while the total power remains unchanged. The new heating is more uniform, and the natural power factor of the system of the ore-fired furnace will be higher, which effectively improves the efficiency of the transformer, reduces useless work, and saves a lot of electric energy. At the same time, due to the manual control of the electrode 13 and the stacking process, the power imbalance is reduced compared with the original three electrodes 13, which effectively improves the power factor of the short grid, reduces the imbalance of the power grid, reduces energy consumption, and improves the smelting efficiency.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of high-efficiency six-electrode ore-fired furnace, characterized in that: include: A factory building (1), wherein a furnace body load-bearing platform (15) is fixedly installed in the factory building (1), a mineral heat furnace body (6) is fixedly installed on the furnace body load-bearing platform (15), a gripper system (5) is installed on the mineral heat furnace body (6), a smoke exhaust system (4) is installed on the mineral heat furnace body (6), a transformer (11) is installed on the factory building (1), a plurality of electrodes (13) are installed on the transformer (11), the number of the electrodes (13) is six, and the six electrodes (13) are equidistantly distributed in a ring, a hydraulic rod (7) is installed above the electrode (13) in the factory building (1), a short grid frame (3) is fixedly installed at the bottom end of the hydraulic rod (7), and the six electrodes (13) are fixedly installed in the short grid frame (3).

2. A novel high-efficiency six-electrode ore-fired furnace according to claim 1, characterized in that: The plant (1) is located on one side of the ore-fired furnace body (6) and is fixedly provided with a water cooling system (2). A furnace ignition machine (8) is provided in the plant (1).

3. A novel high-efficiency six-electrode ore-fired furnace according to claim 1, characterized in that: The factory building (1) is located above the ore-fired furnace body (6) and is fixedly equipped with a crane (12).

4. A novel high-efficiency six-electrode ore furnace according to claim 1, characterized in that: The factory building (1) is provided with a discharge system (9) on one side of the ore-fired furnace body (6).

5. The novel high-efficiency six-electrode ore-fired furnace according to claim 1 is characterized in that: A double-beam hanging crane (10) is fixedly installed in the factory building (1).

6. A novel high-efficiency six-electrode ore-fired furnace according to claim 1, characterized in that: A smoke exhaust pipe (14) is fixedly installed on the factory building (1).

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