Smoke collecting hood for feeding opening of copper smelting top-blowing smelting furnace
Through the design of double-layer smoke collecting hoods inside and outside, the problem of flue gas leakage at the feed outlet of the copper smelting top blown smelting furnace is solved, effectively collecting flue gas and safe material transmission are achieved, and environmental protection and safety of operation are improved.
Patent Information
- Application Number
- CN202422582565.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The smoke collecting hood at the feeding port of the existing copper smelting top blowing smelting furnace is difficult to fix, causing flue gas to emerge from the gap, which has environmental protection problems and difficulty in cleaning, and the materials are prone to spilling, which causes safety risks.
The inner and outer double-layer smoke collecting hood design is adopted. The inner smoke cover is fixed on the flange of the furnace top feeding port shaking with the furnace body. The outer smoke cover is fixed on the belt frame and the smoke pipe. The smoke of the inner smoke cover is collected through the outer smoke cover. The cover door can be opened and closed to control the flow of smoke.
The complete collection of smoke is achieved, so as to reduce the overflow of smoke and dust, reduce the risk of air leakage, and improve safety and operation convenience.
Smart Images
Figure CN223243350U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of smelting furnaces in smelting plants, in particular to a smoke collecting hood for a charging port of a top-blown smelting furnace for copper smelting. Background Art
[0002] In modern copper pyrometallurgy, top-blown bath smelting is a relatively advanced pyrometallurgical technique. The most representative furnace types are the Ausmelt and ISA furnaces. These furnaces are responsible for smelting copper concentrate, producing high-grade matte, slag, and flue gas with a high concentration of sulfur dioxide. This is a key process in copper smelting. A top-blown smelting furnace uses a top loader to feed a mixture of copper concentrate, related fluxes, and other materials into the furnace through the top charging port. This mixture, containing the copper concentrate, undergoes pyrolysis as it falls. Once it enters the molten bath at the bottom of the furnace, a series of physical and chemical reactions rapidly occur, producing matte, slag, and high-temperature flue gas in a short period of time.
[0003] During this process, high-temperature flue gas primarily enters the main flue and is extracted by the acid-making high-temperature fan. However, when furnace conditions fluctuate, the flue gas in the furnace may experience a short-term positive pressure. During this period, some of the high-temperature flue gas may escape from the furnace top charging port, causing environmental problems.
[0004] In response to the flue gas coming out of the charging port, the copper smelting industry generally adds a smoke hood at the charging port to collect the flue gas, but the smoke hood at this location has the following disadvantages: First, the top-blown smelting furnace uses a blower for production, and the furnace body is in a shaking state during production, while the smoke hood must be connected to the smoke pipe and is static. The smoke hood cannot be directly fixed on the furnace top, otherwise it is easy to shake and fall apart, and it is difficult to construct a closed smoke hood; second, because the smoke hood cannot be fixed on the furnace top, there is a large gap between it and the furnace top platform, and when the charging port smokes, a large amount of smoke will come out of the gap; third, the smoke hood must be open in the direction of the belt, and the gap is large, which is easy to leak air and smoke; fourth, the material on the belt will be partially thrown between the charging port and the smoke hood, which is difficult to clean and has a safety risk of burns. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides a smoke collecting hood for a charging port of a copper smelting top-blown smelting furnace.
[0006] The specific scheme of the present utility model is as follows: A smoke collecting hood for the charging port of a copper smelting top-blown smelting furnace, comprising an inner smoke collecting hood and an outer smoke collecting hood, the bottom of the inner smoke collecting hood being sleeved on the charging port, the outer smoke collecting hood being sleeved on the outside of the inner smoke collecting hood, the outer smoke collecting hood being installed on the bracket of the belt conveyor, a certain distance being provided between the bottom of the outer smoke collecting hood and the smelting furnace, a through hole being provided at the top of the outer smoke collecting hood corresponding to the smoke outlet of the inner smoke collecting hood, a smoke guide pipe being provided at the top of the through hole; an opening being provided on one side of the outer smoke collecting hood and the inner smoke collecting hood corresponding to the feeding belt conveyor, and the feeding belt conveyor extending into the inner smoke collecting hood from the opening.
[0007] Furthermore, a smoke outlet pipe is provided at the top end of the inner smoke collecting hood, and the smoke outlet pipe passes through the outer smoke collecting hood upwards and extends into the smoke guide pipe.
[0008] Furthermore, the feeding port is provided with a flange, and the bottom of the inner smoke collecting hood is fixedly connected to the flange.
[0009] Furthermore, the bottom and top ends of the inner smoke hood are both conical, and the middle section is cylindrical.
[0010] Furthermore, the openings of the outer smoke collecting hood and the inner smoke collecting hood are both equipped with openable and closable hood doors. When feeding, the hood doors are opened, and after feeding, the belt conveyor withdraws and the hood doors are closed.
[0011] Compared with the prior art, the utility model has the following beneficial effects: by setting up an inner and outer double-layer smoke hood, the smoke generated during charging can be completely collected, reducing the overflow of smoke and dust; the inner smoke hood is fixed on the flange of the charging port on the top of the furnace and is allowed to swing with the furnace body; the outer smoke hood is fixed by the belt rack and the smoke pipe on the factory platform, keeping it static and not interfering with each other, thus avoiding the completely static smoke hood being shaken and damaged by the shaking furnace body. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional schematic diagram of the utility model;
[0013] Figure 2 It is the main view of the utility model;
[0014] Figure 3 yes Figure 2 A top view of
[0015] Figure 4 yes Figure 3 AA view;
[0016] In the figure: 1. External smoke hood; 2. Smoke guide pipe; 3. Belt conveyor; 4. Furnace body; 5. Bracket; 6. Internal smoke hood; 7. Feeding port. DETAILED DESCRIPTION
[0017] like Figure 1-4 As shown, this embodiment is a smoke collecting hood for the charging port 7 of a copper smelting top-blown smelting furnace, comprising an inner smoke collecting hood 6 and an outer smoke collecting hood 1. The bottom of the inner smoke collecting hood 6 is sleeved on the charging port 7, and the outer smoke collecting hood 1 is sleeved on the outside of the inner smoke collecting hood 6. The outer smoke collecting hood 1 is installed on the bracket 5 of the belt conveyor 3. A certain distance is provided between the bottom of the outer smoke collecting hood 1 and the smelting furnace. A through hole is provided at the top of the outer smoke collecting hood 1 corresponding to the smoke outlet of the inner smoke collecting hood 6, and a smoke guide pipe 2 is installed at the top of the through hole; the outer smoke collecting hood 1 and the inner smoke collecting hood 6 are provided with openings on one side corresponding to the feeding belt conveyor 3, and the feeding belt conveyor 3 extends into the inner smoke collecting hood 6 from the opening.
[0018] Furthermore, a smoke outlet pipe is provided at the top of the inner smoke collecting hood 6 , and the smoke outlet pipe passes through the outer smoke collecting hood 1 upward and extends into the smoke guide pipe 2 .
[0019] Furthermore, the feeding port 7 is provided with a flange, and the bottom of the inner smoke collecting hood 6 is fixedly connected to the flange.
[0020] Furthermore, the bottom and top ends of the inner smoke collecting hood 6 are both conical, and the middle section is cylindrical.
[0021] Furthermore, the openings of the outer smoke collecting hood 1 and the inner smoke collecting hood 6 are both provided with openable and closable hood doors. When feeding, the hood doors are opened, and after feeding, the belt conveyor 3 is withdrawn and the hood doors are closed.
[0022] This new design employs a double-layered smoke hood design. The large amount of smoke from the charging port 7 is directly channeled by the inner smoke hood into the outer smoke hood's smoke collection port. Any smoke leaking from gaps in the inner smoke hood, such as the charging port's working door or the belt inlet, is collected by the outer smoke hood, eliminating any substantial leaks. This resolves the conflict between the dynamics of the furnace roof and the statics of the smoke pipe: the inner smoke hood is fixed to the flange of the charging port 7 and will sway with the furnace body 4; the outer smoke hood is secured by the belt rack and smoke pipe on the factory platform, maintaining a static position.
[0023] The opening at the top of the inner hood directs smoke into the smoke collection port of the outer hood. The inner and outer hoods, with their dynamic and static connections, are not rigidly connected, making them less susceptible to damage and enabling efficient smoke collection. Spilled materials are effectively collected: the inner hood effectively enlarges the furnace top charging port 7 in three dimensions, acting as a hopper. When the belt-carried material hits the inner wall of the inner hood, it falls into the furnace body 4, eliminating the problem of material scattering at the charging port 7 and reducing worker labor.
Claims
1. A fume hood for a charging port of a top-blown copper smelting furnace, characterized by: It includes an inner smoke hood and an outer smoke hood. The bottom of the inner smoke hood is sleeved on the feeding port, and the outer smoke hood is sleeved on the outside of the inner smoke hood. The outer smoke hood is installed on the bracket of the belt conveyor. There is a certain distance between the bottom of the outer smoke hood and the smelting furnace. A through hole is provided at the top of the outer smoke hood corresponding to the smoke outlet of the inner smoke hood, and a smoke guide pipe is installed at the top of the through hole; the outer smoke hood and the inner smoke hood are provided with openings on one side corresponding to the feeding belt conveyor, and the feeding belt conveyor extends into the inner smoke hood from the opening.
2. The fume collecting hood for the charging port of a top-blown copper smelting furnace according to claim 1, characterized in that: A smoke outlet pipe is provided at the top of the inner smoke collecting hood. The smoke outlet pipe passes through the outer smoke collecting hood upwards and extends into the smoke guide pipe.
3. The fume collecting hood for the charging port of a top-blown copper smelting furnace according to claim 1, characterized in that: A flange is provided at the feeding port, and the bottom of the inner smoke collecting hood is fixedly connected to the flange.
4. The fume collecting hood for the charging port of a top-blown copper smelting furnace according to claim 1, characterized in that: The bottom and top ends of the inner smoke collecting hood are both conical, and the middle section is cylindrical.
5. The fume collecting hood for the charging port of a top-blown copper smelting furnace according to claim 1, characterized in that: The openings of the outer smoke collecting hood and the inner smoke collecting hood are both provided with hood doors that can be opened and closed.