A corundum smelting apparatus
Patent Information
- Application Number
- CN202521956097.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-09-11
AI Technical Summary
[0009]因此，本实用新型采用上述一种刚玉冶炼装置，通过烟气余热回收与循环，降低冶炼能耗、减少污染物排放，提升刚玉冶炼效率与产品质量。
Smart Images
Figure CN224707249U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of corundum smelting technology, and in particular to a corundum smelting apparatus. Background Technology
[0002] In corundum smelting, the traditional process often adopts a combined method of "rotary kiln preheating and roasting - electric arc furnace melting and smelting". That is, the rotary kiln first preheats the raw materials, removes moisture and volatiles, and then the roasted material is transported to the electric arc furnace for high-temperature melting reaction. However, the existing combined device has significant defects: First, the high-temperature flue gas generated during the rotary kiln roasting process contains a large amount of waste heat. Existing technologies mostly discharge it directly through the chimney without effective recovery, resulting in low energy utilization and increased overall smelting energy consumption. Second, the emitted flue gas contains pollutants such as dust and SO2. Direct emission requires additional tail gas treatment equipment, which increases environmental protection costs. Moreover, the non-recycled flue gas also reduces the utilization rate of useful components in the raw materials. At the same time, the electric arc furnace smelting requires additional fuel to maintain the high temperature, without utilizing the combustion or preheating effect of the rotary kiln flue gas, further increasing energy consumption. Therefore, designing a corundum smelting device has become an urgent problem to be solved in the field of corundum smelting. Utility Model Content
[0003] The purpose of this invention is to provide a corundum smelting device that reduces smelting energy consumption, decreases pollutant emissions, and improves corundum smelting efficiency and product quality through flue gas waste heat recovery and circulation.
[0004] To achieve the above objectives, this utility model provides a corundum smelting apparatus, including a rotary kiln body, an electric arc furnace body, a screw conveyor, and a flue gas circulation mechanism. A rotary kiln discharge port is provided at the bottom of one end of the rotary kiln body, and one end of the screw conveyor is connected to the rotary kiln discharge port. An electric arc furnace inlet is provided on one side of the top of the electric arc furnace body, and the other end of the screw conveyor is connected to the electric arc furnace inlet. The flue gas circulation mechanism is located between the rotary kiln body and the electric arc furnace body. The flue gas circulation mechanism includes a circulation main pipe, a purification component, a heating component, a diversion pipe, a first branch pipe, and a second branch pipe. A first flue gas outlet is provided at the top of one end of the rotary kiln body. The circulation main pipe is connected to the first flue gas outlet. The purification component is connected to the circulation main pipe. The heating component is connected to the purification component. The diversion pipe is connected to the heating component. The first branch pipe and the second branch pipe are respectively connected to the diversion pipe. A first flue gas return inlet is provided on the side wall of one end of the rotary kiln body. The other end of the first branch pipe is connected to the first flue gas return inlet. A second flue gas return inlet is provided on the side wall of the electric arc furnace body. The other end of the second branch pipe is connected to the second flue gas return inlet.
[0005] Preferably, the flue gas recirculation mechanism further includes a flue gas recovery pipe, a first temperature sensor, a second temperature sensor, a third temperature sensor, a first flow regulating valve, and a second flow regulating valve. A second flue gas outlet is provided on the other side of the top of the electric arc furnace body. One end of the flue gas recovery pipe is connected to the second flue gas outlet, and the other end of the flue gas recovery pipe is connected to the main circulation pipe. The first temperature sensor is installed on the main circulation pipe, the second temperature sensor is installed on the end of the branch pipe near the first branch pipe, the first flow regulating valve is installed between the branch pipe and the first branch pipe, the third temperature sensor is installed on the end of the branch pipe near the second branch pipe, and the second flow regulating valve is installed between the branch pipe and the second branch pipe.
[0006] Preferably, the purification assembly includes a cyclone dust collector, a bag filter dust collector, and a desulfurization tower. The other end of the circulation main pipe is connected to the cyclone dust collector. A first connecting pipe is connected to the top of the cyclone dust collector. The other end of the first connecting pipe is connected to the bag filter dust collector. A second connecting pipe is connected to the other side of the bag filter dust collector. The other end of the second connecting pipe is connected to the desulfurization tower. A third connecting pipe is connected to the top of the desulfurization tower. The other end of the third connecting pipe is connected to the heating assembly.
[0007] Preferably, the heating assembly includes a circulating fan and an electric heater. The circulating fan is connected to the other end of the third connecting pipe, one end of the electric heater is connected to the circulating fan, and the other end of the electric heater is connected to the branch pipe.
[0008] Preferably, a raw material inlet is provided at the other end of the rotary kiln body.
[0009] Therefore, this utility model adopts the above-mentioned corundum smelting device, which reduces smelting energy consumption, reduces pollutant emissions, and improves corundum smelting efficiency and product quality through flue gas waste heat recovery and circulation.
[0010] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of the corundum smelting device in this utility model.
[0012] Figure Labels 1. Rotary kiln body; 2. Electric arc furnace body; 3. Screw conveyor; 4. Rotary kiln outlet; 5. Electric arc furnace inlet; 6. Main circulation pipe; 7. Diverter pipe; 8. First branch pipe; 9. Second branch pipe; 10. First flue gas outlet; 11. First flue gas return inlet; 12. Second flue gas return inlet; 13. Flue gas recovery pipe; 14. First temperature sensor; 15. Second temperature sensor; 16. Third temperature sensor; 17. First flow regulating valve; 18. Second flow regulating valve; 19. Second flue gas outlet; 20. Cyclone dust collector; 21. Bag filter dust collector; 22. Desulfurization tower; 23. First connecting pipe; 24. Second connecting pipe; 25. Third connecting pipe; 26. Circulating fan; 27. Electric heater; 28. Raw material inlet. Detailed Implementation
[0013] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0014] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0015] like Figure 1 As shown, a corundum smelting apparatus includes a rotary kiln body 1, an electric arc furnace body 2, a screw conveyor 3, and a flue gas circulation mechanism. A rotary kiln outlet 4 is located at the bottom of one end of the rotary kiln body 1. One end of the screw conveyor 3 is connected to the rotary kiln outlet 4. An electric arc furnace inlet 5 is located on one side of the top of the electric arc furnace body 2. The other end of the screw conveyor 3 is connected to the electric arc furnace inlet 5. The flue gas circulation mechanism is located between the rotary kiln body 1 and the electric arc furnace body 2. Specifically, the rotary kiln outlet 4 is located at the bottom of one end of the rotary kiln body 1, one end of the screw conveyor 3 is connected to the rotary kiln outlet 4 via a flange, and an electric arc furnace inlet 5 is located on one side of the top of the electric arc furnace body 2. The other end of the screw conveyor 3 is connected to the electric arc furnace inlet 5 via a flange. The flue gas circulation mechanism is located between the rotary kiln body 1 and the electric arc furnace body 2.
[0016] The flue gas circulation mechanism includes a main circulation pipe 6, a purification component, a heating component, a branch pipe 7, a first branch pipe 8, and a second branch pipe 9. A first flue gas outlet 10 is located at the top of one end of the rotary kiln body 1. The main circulation pipe 6 is connected to the first flue gas outlet 10. The purification component is connected to the main circulation pipe 6, and the heating component is connected to the purification component. The branch pipe 7 is connected to the heating component. The first branch pipe 8 and the second branch pipe 9 are respectively connected to the branch pipe 7. A first flue gas return inlet 11 is located on the side wall of one end of the rotary kiln body 1. The other end of the first branch pipe 8 is connected to the first flue gas return inlet 11. A second flue gas return inlet 12 is located on the side wall of the electric arc furnace body 2. The other end of the second branch pipe 9 is connected to the second flue gas return inlet 12. Specifically, this is a rotary kiln... A first flue gas outlet 10 is provided at the top of one end of the main body 1. One end of the circulating main pipe 6 is connected to the first flue gas outlet 10 through a flange. The purification component is connected to the other end of the circulating main pipe 6. The heating component is connected to the purification component. One end of the diversion pipe 7 is connected to the heating component. The first branch pipe 8 is connected to one side of the other end of the diversion pipe 7 through a flange. The second branch pipe 9 is connected to the other side of the other end of the diversion pipe 7 through a flange. A first flue gas return inlet 11 is provided on the side wall of one end of the rotary kiln main body 1. The other end of the first branch pipe 8 is connected to the first flue gas return inlet 11 through a flange. A second flue gas return inlet 12 is provided on the side wall of the electric arc furnace main body 2. The other end of the second branch pipe 9 is connected to the second flue gas return inlet 12 through a flange.
[0017] The flue gas recirculation mechanism also includes a flue gas recovery pipe 13, a first temperature sensor 14, a second temperature sensor 15, a third temperature sensor 16, a first flow regulating valve 17, and a second flow regulating valve 18. A second flue gas outlet 19 is located on the other side of the top of the electric arc furnace body 2. One end of the flue gas recovery pipe 13 is connected to the second flue gas outlet 19, and the other end is connected to the main circulation pipe 6. The first temperature sensor 14 is installed on the main circulation pipe 6, the second temperature sensor 15 is installed on the end of the branch pipe 7 near the first branch pipe 8, the first flow regulating valve 17 is installed between the branch pipe 7 and the first branch pipe 8, the third temperature sensor 16 is installed on the end of the branch pipe 7 near the second branch pipe 9, and the second flow regulating valve 18 is installed between the branch pipe 7 and the second branch pipe 9. Specifically, the second flue gas outlet 19 is located on the other side of the top of the electric arc furnace body 2, and one end of the flue gas recovery pipe 13 is connected to the second flue gas outlet 19 via a flange. The other end of the flue gas recovery pipe 13... The first branch pipe 7 is connected to the main circulation pipe 6 via a flange. A first temperature sensor 14 is installed on the main circulation pipe 6. The first temperature sensor 14 is used to monitor the temperature of the untreated flue gas flowing out in real time. A second temperature sensor 15 is installed at the end of the branch pipe 7 near the first branch pipe 8. The second temperature sensor 15 is used to monitor the temperature of the treated flue gas flowing into the first branch pipe 8 in real time. A first flow regulating valve 17 is installed between the branch pipe 7 and the main circulation pipe. The first flow regulating valve 17 regulates the flow rate of the flue gas flowing into the first branch pipe 8 according to the temperature monitored in real time by the second temperature sensor 15. A third temperature sensor 16 is installed at the end of the branch pipe 7 near the second branch pipe 9. The third temperature sensor 16 is used to monitor the temperature of the treated flue gas flowing into the second branch pipe 9 in real time. A second flow regulating valve 18 is installed between the branch pipe 7 and the second main circulation pipe. The second flow regulating valve 18 regulates the flow rate of the flue gas flowing into the second branch pipe 9 according to the temperature monitored in real time by the third temperature sensor 16.
[0018] The purification assembly includes a cyclone dust collector 20, a bag filter dust collector 21, and a desulfurization tower 22. The other end of the circulation main pipe 6 is connected to the cyclone dust collector 20. A first connecting pipe 23 is connected to the top of the cyclone dust collector 20, and the other end of the first connecting pipe 23 is connected to the bag filter dust collector 21. A second connecting pipe 24 is connected to the other side of the bag filter dust collector 21, and the other end of the second connecting pipe 24 is connected to the desulfurization tower 22. A third connecting pipe 25 is connected to the top of the desulfurization tower 22, and the other end of the third connecting pipe 25 is connected to the heating assembly. (Specific details follow.) The other end of the circulating main pipe 6 is connected to the cyclone dust collector 20 via a flange. The top of the cyclone dust collector 20 is connected to the first connecting pipe 23 via a flange. The other end of the first connecting pipe 23 is connected to the bag dust collector 21 via a flange. The other side of the bag dust collector 21 is connected to the second connecting pipe 24 via a flange. The other end of the second connecting pipe 24 is connected to the desulfurization tower 22 via a flange. The top of the desulfurization tower 22 is connected to the third connecting pipe 25 via a flange. The other end of the third connecting pipe 25 is connected to the heating component.
[0019] The heating assembly includes a circulating fan 26 and an electric heater 27. The circulating fan 26 is connected to the other end of the third connecting pipe 25. One end of the electric heater 27 is connected to the circulating fan 26, and the other end of the electric heater 27 is connected to the branch pipe 7. Specifically, the circulating fan 26 is connected to the other end of the third connecting pipe 25 through a flange, one end of the electric heater 27 is connected to the circulating fan 26 through a flange, and the other end of the electric heater 27 is connected to the branch pipe 7 through a flange.
[0020] The other end of the rotary kiln body 1 is provided with a raw material inlet 28, which is used to put in smelting raw materials.
[0021] Working principle: The smelting raw materials are fed into the rotary kiln body 1 through the raw material inlet 28. Inside the rotary kiln body 1, the raw materials undergo preliminary heating and pretreatment (such as drying and pre-decomposition). The pre-treated material is discharged from the rotary kiln outlet 4 and is received by the screw conveyor 3. Through the screw conveyor 3, the material is conveyed through the electric arc furnace inlet 5 into the electric arc furnace body 2. Inside the electric arc furnace body 2, the subsequent high-temperature smelting process is completed, producing corundum products. The flue gas generated inside the rotary kiln body 1 is discharged from the first flue gas outlet 10 and enters the circulating main pipe 6 and the electric arc furnace. The flue gas generated inside the main body 2 is discharged from the second flue gas outlet 19 and flows into the circulation main pipe 6 through the flue gas recovery pipe 13. Ultimately, the two flue gas streams converge within the circulation main pipe 6. The converged flue gas then enters the cyclone dust collector 20 along the circulation main pipe 6, where centrifugal force separates large dust particles. After passing through the cyclone dust collector, the flue gas enters the bag filter 21 through the first connecting pipe 23 for further filtration of fine dust particles. It then enters the desulfurization tower 22 through the second connecting pipe 24 to remove sulfides from the flue gas. The purified flue gas then enters the subsequent heating stage through the third connecting pipe 25. The purified flue gas is supplied by the circulating fan 26. Power is supplied to the electric heater 27, which heats the flue gas to the required temperature for subsequent reuse. The heated flue gas then enters the diversion pipe 7, which splits it into two paths, one for reuse inside the rotary kiln body 1 and the other for reuse inside the electric arc furnace body 2. A portion of the flue gas is returned to the rotary kiln body 1 via the first branch pipe 8 and the other through the first flue gas return inlet 11. A second temperature sensor 15 is installed at the end of the diversion pipe 7 near the first branch pipe 8 to monitor the temperature of the flue gas in this path in real time. If the temperature does not meet the requirements for reuse in the rotary kiln, the first flow regulating valve 17 will adjust the flow rate based on the temperature data. The flue gas flow rate is adjusted to ensure that the temperature of the returned flue gas is suitable for the rotary kiln process. Another part of the flue gas enters the electric arc furnace through the second flue gas return inlet 12 via the second branch pipe 9. A third temperature sensor 16 is installed at the end of the diversion pipe 7 near the second branch pipe 9 to monitor the temperature of the flue gas in real time. If the temperature does not meet the requirements for reuse in the electric arc furnace, the second flow regulating valve 18 will adjust the flue gas flow rate according to the temperature data to ensure that the temperature of the returned flue gas is suitable for the electric arc furnace process. In addition, the first temperature sensor 14 installed on the main circulation pipe 6 can monitor the initial temperature of the untreated flue gas in real time, providing a reference for the parameter adjustment of the subsequent purification and heating stages.
[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.
Claims
1. A corundum smelting apparatus, characterized in that: The system includes a rotary kiln body, an electric arc furnace body, a screw conveyor, and a flue gas circulation mechanism. The rotary kiln body has a rotary kiln outlet at one bottom end, and one end of the screw conveyor is connected to the rotary kiln outlet. The electric arc furnace body has an electric arc furnace inlet on one side of its top, and the other end of the screw conveyor is connected to the electric arc furnace inlet. The flue gas circulation mechanism is located between the rotary kiln body and the electric arc furnace body. The flue gas circulation mechanism includes a main circulation pipe, a purification component, a heating component, a diversion pipe, a first branch pipe, and a second branch pipe. A first flue gas outlet is provided at the top of one end of the rotary kiln body. The main circulation pipe is connected to the first flue gas outlet. The purification component is connected to the main circulation pipe. The heating component is connected to the purification component. The diversion pipe is connected to the heating component. The first branch pipe and the second branch pipe are respectively connected to the diversion pipe. A first flue gas return inlet is provided on the side wall of one end of the rotary kiln body. The other end of the first branch pipe is connected to the first flue gas return inlet. A second flue gas return inlet is provided on the side wall of the electric arc furnace body. The other end of the second branch pipe is connected to the second flue gas return inlet.
2. The corundum smelting apparatus according to claim 1, characterized in that: The flue gas circulation mechanism further includes a flue gas recovery pipe, a first temperature sensor, a second temperature sensor, a third temperature sensor, a first flow regulating valve, and a second flow regulating valve. A second flue gas outlet is provided on the other side of the top of the electric arc furnace body. One end of the flue gas recovery pipe is connected to the second flue gas outlet, and the other end of the flue gas recovery pipe is connected to the main circulation pipe. The first temperature sensor is installed on the main circulation pipe, the second temperature sensor is installed on the end of the branch pipe near the first branch pipe, the first flow regulating valve is installed between the branch pipe and the first branch pipe, the third temperature sensor is installed on the end of the branch pipe near the second branch pipe, and the second flow regulating valve is installed between the branch pipe and the second branch pipe.
3. The corundum smelting apparatus according to claim 1, characterized in that: The purification assembly includes a cyclone dust collector, a bag filter dust collector, and a desulfurization tower. The other end of the main circulation pipe is connected to the cyclone dust collector. A first connecting pipe is connected to the top of the cyclone dust collector, and the other end of the first connecting pipe is connected to the bag filter dust collector. A second connecting pipe is connected to the other side of the bag filter dust collector, and the other end of the second connecting pipe is connected to the desulfurization tower. A third connecting pipe is connected to the top of the desulfurization tower, and the other end of the third connecting pipe is connected to the heating assembly.
4. The corundum smelting apparatus according to claim 3, characterized in that: The heating assembly includes a circulating fan and an electric heater. The circulating fan is connected to the other end of the third connecting pipe, one end of the electric heater is connected to the circulating fan, and the other end of the electric heater is connected to the shunt pipe.
5. The corundum smelting apparatus according to claim 1, characterized in that: The rotary kiln body has a raw material inlet at the other end.