Recycled copper refining reverberatory furnace system with safety device

Abstract

The utility model discloses a reclaimed copper refining reverberatory furnace system with a safety device, which is provided with a refining reverberatory furnace body, a furnace mouth is arranged on the refining reverberatory furnace body, a smoke collecting hood is arranged on the outer side of the furnace mouth of the refining reverberatory furnace body, the reclaimed copper refining reverberatory furnace system further comprises a reduction pipe, and the tail end of the reduction pipe is connected with a reducing agent pipeline through a metal hose. A manual valve is arranged on the reducing agent pipeline, the reducing pipe is inserted into a molten pool in the refining reverberatory furnace body when being used, and a safety device is further arranged and comprises a purging mechanism, a controller, a reducing agent cutting mechanism, a pressure detection mechanism and an alarm device. According to the regenerated copper refining reverberatory furnace with the safety device, automatic control is achieved, the response speed when the reduction pipe is burnt is greatly shortened, and the safety of refining operation is guaranteed; the consumption of a reducing agent is obviously reduced, and the working environment and the labor intensity of operators are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of recycled copper refining equipment, in particular to a recycled copper refining reverberatory furnace system with a safety device. Background Art

[0002] When the regenerative copper refining reverberatory furnace is performing reduction refining operations (see Figure 1 ), the reducing agent pipeline is connected to the reducing pipe with a metal hose, and the reducing pipe is inserted into the melting pool in the furnace through the reverberatory furnace. The gaseous reducing agent (natural gas, liquefied petroleum gas, etc.) enters the copper liquid layer in the melting pool through the reducing pipe, reacts with the copper oxide contained in the copper liquid, and reduces it to metallic copper. The reducing pipe is a seamless steel pipe, and its front end is bent and covered with a protective layer. This part is called an elbow (see Figure 2 ).

[0003] To ensure the refining efficiency, the elbow of the reduction tube is deeply inserted into the copper liquid layer. Since the temperature of the copper liquid is as high as 1200℃, the protective layer at the elbow of the reduction tube is damaged and falls off after 15 to 30 minutes of use, causing the steel pipe at the elbow to be exposed to the high-temperature copper liquid and burnt and fall off in less than 1 minute. The reducing agent rushes out from the burnt part of the reduction tube and floats into the furnace before it has time to fully react with the copper liquid: part of it is taken away with the flue gas, causing great waste; the other part enters the furnace, causing the concentration of the gaseous reducing agent in the furnace to reach the explosion limit, posing a safety risk. Therefore, once the elbow of the reduction tube is burned, the manual valve of the reducing agent pipeline needs to be closed immediately to cut off the delivery of the reducing agent.

[0004] During reduction refining, thick black smoke fills the furnace mouth, and it is impossible to observe the use of the reduction tube from a distance. Therefore, recycled copper companies require operators to stand guard outside the furnace mouth or even hold the tube during reduction refining, promptly discover the burning of the reduction tube elbow, and promptly close the manual valve of the reducing agent pipeline. However, with the improvement of environmental protection requirements, a fully enclosed fume hood is set up around the furnace mouth of the refining reverberatory furnace to capture flue gas. The temperature in the fume hood is high and the ventilation is poor, forming a confined space. Operators cannot stay in the fume hood for a long time, and cannot promptly discover the burning of the reduction tube, which poses a safety hazard. Utility Model Content

[0005] The purpose of the utility model is to provide a regenerated copper refining reverberatory furnace system with a safety device in view of the above situation. In addition to meeting the normal copper refining production, the refining reverberatory furnace system can also effectively improve production safety.

[0006] The specific scheme of the utility model is: a regenerated copper refining reverberatory furnace system with a safety device, comprising a refining reverberatory furnace body, a furnace mouth being arranged on the refining reverberatory furnace body, a smoke collecting hood being arranged on the outer side of the furnace mouth of the refining reverberatory furnace body, and a reduction pipe being also included, the tail end of the reduction pipe being connected to a reducing agent pipeline through a metal hose, a manual valve being arranged on the reducing agent pipeline, the reduction pipe being inserted into a molten pool in the refining reverberatory furnace body when in use, and a safety device being also provided, the safety device comprising a purge mechanism, a controller, a reducing agent cut-off mechanism, a pressure detection mechanism and an alarm device, the purge mechanism, the reducing agent cut-off mechanism, the pressure detection mechanism and the alarm device are all electrically connected to the controller, and the purge mechanism, the reducing agent cut-off mechanism and the pressure detection mechanism are all connected to the reducing agent pipeline.

[0007] Furthermore, the reducing agent cut-off mechanism in the utility model is composed of a reducing agent ball valve, which is arranged on the reducing agent pipeline and placed upstream of the manual valve, and the reducing agent ball valve is control-connected to the controller.

[0008] Furthermore, the pressure detection mechanism in the utility model includes a pressure gauge, which is arranged on the reducing agent pipeline and placed upstream of the manual valve, and the pressure gauge is electrically connected to the controller.

[0009] Furthermore, the purge mechanism described in the utility model includes a purge air pipe and a purge ball valve, one end of the purge air pipe is connected to the reducing agent pipeline and is placed downstream of the manual valve, the other end of the purge air pipe is connected to the nitrogen gas source, the purge ball valve is placed on the purge air pipe, and the purge ball valve is controlled and connected to the controller.

[0010] Furthermore, the alarm device in the utility model is composed of an audible and visual alarm, which is electrically connected to the controller and is placed in a conspicuous position in the working area.

[0011] Furthermore, the controller in the present invention adopts a PID control method.

[0012] Furthermore, the pressure gauge described in the utility model is a digital remote pressure gauge.

[0013] The utility model discloses a regenerated copper refining reverberatory furnace with a safety device, which realizes automatic control, greatly shortens the response speed when the reduction tube is burned out, ensures the safety of the refining operation, significantly saves the consumption of reducing agent, and improves the operating environment and labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an existing reduction refining furnace;

[0015] Figure 22. It is a schematic diagram of the structure of the reduction tube;

[0016] Figure 3 It is a structural schematic diagram of the utility model.

[0017] In the figure: 1—refining reverberatory furnace body, 2—molten pool, 3—reduction pipe, 4—furnace mouth, 5—smoke hood, 6—reducing agent pipeline, 7—manual valve, 8—metal hose, 9—elbow, 10—purge air pipe, 11—purge ball valve, 12—sound and light alarm, 13—controller, 14—pressure gauge, 15—reducing agent ball valve. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings of the utility model to clearly and completely describe the technical solution of the utility model. It is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the utility model. In the description of the utility model, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 3The utility model is a regenerated copper refining reverberatory furnace system with a safety device, comprising a refining reverberatory furnace body 1, a furnace mouth 4 being arranged on the refining reverberatory furnace body, a smoke collecting hood 5 being arranged outside the furnace mouth of the refining reverberatory furnace body, and a reduction pipe 3 being also included, the front end of the reduction pipe being arranged as an elbow structure, the tail end of the reduction pipe being connected to a reducing agent pipeline 6 through a metal hose 8, a manual valve 7 being arranged on the reducing agent pipeline, and the reduction pipe being inserted into a molten pool 2 in the refining reverberatory furnace body when in use, and a safety device being also provided, the safety device comprising a purging mechanism, a controller 13, a reducing agent cutting mechanism, a pressure detecting mechanism and an alarm device, the purging mechanism, the reducing agent cutting mechanism, the pressure detecting mechanism and the alarm device being all electrically connected to the controller, the purging mechanism, the reducing agent cutting mechanism and the pressure detecting mechanism being all connected to the reducing agent pipeline; further, the controller in the utility model adopts a PID control method.

[0021] Furthermore, the reducing agent cutting mechanism in the present invention is composed of a reducing agent ball valve 15, which is arranged on the reducing agent pipeline and placed upstream of the manual valve, and the reducing agent ball valve is control-connected to the controller.

[0022] Furthermore, the pressure detection mechanism in the present invention includes a pressure gauge 14, which is mounted on the reducing agent pipeline and placed upstream of the manual valve, and is electrically connected to the controller; further, the pressure gauge in the present invention is a digital remote pressure gauge.

[0023] Furthermore, the purge mechanism described in the utility model includes a purge air pipe 10 and a purge ball valve 11, one end of the purge air pipe is connected to the reducing agent pipeline and is placed downstream of the manual valve, the other end of the purge air pipe is connected to the nitrogen gas source, the purge ball valve is placed on the purge air pipe, and the purge ball valve is controlled and connected to the controller.

[0024] Furthermore, the alarm device in the present invention is composed of an audible and visual alarm 12, which is electrically connected to the controller and is placed in a conspicuous position in the working area.

[0025] The pressure detection mechanism in the utility model is composed of a digital remote pressure gauge and a controller installed on the reducing agent pipeline. The reducing agent is natural gas. The pressure gauge is installed at the upstream position of the manual ball valve. The controller adopts PID control mode, and the standard pressure value is pre-set to 300kPa and the deviation value is 10kPa.

[0026] The purge mechanism consists of a purge air pipe and a purge ball valve installed on the purge air pipe. The purge air pipe is connected to the reducing agent pipeline at the downstream position of the manual ball valve. The purge gas medium is nitrogen.

[0027] The reducing agent cut-off mechanism is composed of a reducing agent ball valve installed on the reducing agent pipeline. The reducing agent ball valve is installed at the upstream position of the manual ball valve and is connected to the controller.

[0028] The alarm device is an audible and visual alarm, which is installed in a conspicuous location in the work area or in the operator's duty room.

[0029] The use method of the utility model is as follows: during reduction refining, the digital remote pressure gauge detects the pressure of the reducing agent pipeline in real time online, and transmits the pressure data to the controller in real time. The controller receives the pressure data and compares it with the preset standard pressure value - 300kPa; when the difference between the instantaneous pressure value of the reducing agent pipeline and the standard pressure value is less than the preset "deviation value" - 10kPa, it is judged that the elbow of the reducing pipe is burned, and the safety control measures are implemented: (1) the controller interlocks to close the reducing agent ball valve and cuts off the delivery of the natural gas reducing agent; (2) the controller interlocks to open the purge ball valve, and nitrogen is introduced into the natural gas pipeline, the metal hose, and the reducing pipe in turn; and the natural gas reducing agent entering the furnace is diluted to reduce its concentration to outside the explosion limit range; after 5 minutes of purge, the controller interlocks to close the purge ball valve; (3) the controller interlocks to start the sound and light alarm, and sends out sound and light alarm signals to remind the operator to check and confirm the condition of the reducing pipe and take corresponding disposal measures. The operator opens the smoke hood and checks the reduction tube near the furnace mouth. If it is confirmed that the elbow is burned, immediately close the manual valve of the reducing agent pipeline and remove the reduction tube from the molten pool.

[0030] The utility model discloses a regenerated copper refining reverberatory furnace with a safety device, which realizes automatic control, greatly shortens the response speed when the reduction tube is burned out, ensures the safety of the refining operation, significantly saves the consumption of reducing agent, and improves the operating environment and labor intensity of the operator.

Claims

1. A regenerated copper refining reverberatory furnace system with a safety device, comprising a refining reverberatory furnace body, a furnace opening on the refining reverberatory furnace body, a fume collecting hood arranged outside the furnace opening of the refining reverberatory furnace body, and a reduction pipe, the tail end of the reduction pipe is connected to a reducing agent pipeline through a metal hose, a manual valve is arranged on the reducing agent pipeline, and the reduction pipe is inserted into a molten pool in the refining reverberatory furnace body when in use, characterized in that: A safety device is also provided, which includes a purge mechanism, a controller, a reducing agent cut-off mechanism, a pressure detection mechanism and an alarm device. The purge mechanism, the reducing agent cut-off mechanism, the pressure detection mechanism and the alarm device are all electrically connected to the controller, and the purge mechanism, the reducing agent cut-off mechanism and the pressure detection mechanism are all connected to the reducing agent pipeline.

2. A regenerative copper refining reverberatory furnace system with a safety device according to claim 1, characterized in that: The reducing agent cutting mechanism is composed of a reducing agent ball valve, which is arranged on the reducing agent pipeline and placed upstream of the manual valve, and the reducing agent ball valve is control-connected to the controller.

3. The regenerative copper refining reverberatory furnace system with a safety device according to claim 1, characterized in that: The pressure detection mechanism includes a pressure gauge, which is arranged on the reducing agent pipeline and placed upstream of the manual valve, and the pressure gauge is electrically connected to the controller.

4. The regenerative copper refining reverberatory furnace system with a safety device according to claim 1, characterized in that: The purge mechanism includes a purge air pipe and a purge ball valve. One end of the purge air pipe is connected to the reducing agent pipeline and is placed downstream of the manual valve. The other end of the purge air pipe is connected to a nitrogen gas source. The purge ball valve is placed on the purge air pipe and is control-connected to the controller.

5. The regenerative copper refining reverberatory furnace system with a safety device according to claim 1, characterized in that: The alarm device is composed of an audible and visual alarm, which is electrically connected to the controller and is placed at a conspicuous position in the working area.

6. The regenerative copper refining reverberatory furnace system with a safety device according to claim 1, characterized in that: The controller adopts PID control mode.

7. The regenerative copper refining reverberatory furnace system with a safety device according to claim 3, characterized in that: The pressure gauge is a digital remote pressure gauge.

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