Multi-temperature-zone vibration uniform material type gas regulation roasting furnace

Abstract

The utility model relates to a kind of multi-temperature zone vibration uniform material formula gas regulation and control roasting furnace. Including furnace body, reconfigurable multi-temperature zone module, gas deployment device and vibration system, the reconfigurable multi-temperature zone module is composed of corundum pipe inner sleeve resistance wire heater, the gas deployment device is composed of flow controller array, laser sensor (TDLAS) oxygen concentration probe and laser sensor (TDLAS) SO2 gas probe, the vibration system is composed of vibration excitation mechanism, vibration conduction rod and ore sample material tray. The utility model is set up corundum pipe inner sleeve resistance wire heater of independently settable temperature in furnace body interior, set temperature parameter and constitute gradient or isothermal roasting mode, oxygen concentration can be adjusted simultaneously, in addition, the vibration frequency, amplitude and interval of roasting material in tray can be adjusted, to facilitate roasting material particle heated evenly and sufficient in roasting gas environment, meet various roasting setting conditions.

Description

Technical Field

[0001] This utility model relates to the field of laboratory roasting and pretreatment equipment for refractory gold ore, specifically to a multi-temperature zone vibrating uniform gas-controlled roasting furnace. Background Technology

[0002] Laboratory gold ore roasting experiments require roasting and heating ore samples under specific conditions, including temperature, oxygen concentration, and duration. Muffle furnaces or tube furnaces are commonly used in this process. Muffle furnaces directly heat the cavity, where the sample is heated. Due to their large cavity space, they are suitable for processing multiple samples or large batches at once. However, their structural characteristics result in poor temperature uniformity and the inability to introduce oxygen and nitrogen, making precise control of oxygen concentration impossible. Furthermore, traditional muffle furnaces require manual adjustment of the crucible position to achieve gradient roasting, making them susceptible to various factors that can affect the roasting results, leading to inconsistencies.

[0003] Traditional tube furnaces indirectly heat samples through heating tubes, resulting in uniform heat distribution and high temperature control precision. However, because the samples are placed inside the tubes, the heating area is small, limiting the testing to small batches. In large-scale, multi-factor, multi-level tests, the limited sample size leads to low roasting efficiency. Furthermore, fluctuations occur during multiple batches of ore samples, affecting the stability of the test results. Utility Model Content

[0004] The present invention provides a multi-temperature zone vibrating uniform material gas-controlled roasting furnace, which eliminates the uneven temperature and inability to control the reaction atmosphere of the muffle furnace, and also eliminates the problems of small sample size, low experimental efficiency and large fluctuations in results when roasting ore in traditional tube furnaces.

[0005] This utility model provides the following technical solution:

[0006] A multi-temperature zone vibratory homogenizing gas-controlled roasting furnace includes a furnace body, a reconfigurable multi-temperature zone module, a gas distribution device, and a vibration system. The reconfigurable multi-temperature zone module consists of a corundum tube with an inner resistance wire heater. The gas distribution device consists of a flow controller array, a TDLAS laser sensor oxygen concentration probe, and a TDLAS laser sensor SO2 gas probe. The flow controller array and the laser sensor are connected via a circuit. The vibration system consists of a mineral sample tray, a vibration transmission rod, and a vibration excitation mechanism. The front surface of the furnace body has an opening door, and the four corners of the inner bottom surface of the furnace body are equipped with the corundum tube inner resistance wire heaters. The rear side of the furnace body has a mixed gas inlet and a roasting exhaust gas outlet, with the mixed gas inlet located to the left of the roasting exhaust gas outlet, and the two outlets positioned between them. A baffle plate is provided, which is fixedly connected to the upper wall and top wall of the furnace body. A flow controller array is provided behind the mixed gas inlet, which is fixedly connected to the rear side of the furnace body. A TDLAS laser sensor oxygen concentration probe is provided below the mixed gas inlet, which is fixedly connected to the rear side wall inside the furnace body. A TDLAS SO2 laser sensor is provided below the roasting tail gas exhaust port, which is fixedly connected to the rear side wall inside the furnace body. A vibration excitation mechanism is provided at the bottom of the furnace body, and a vibration transmission rod is provided at the top of the vibration excitation mechanism, which extends into the furnace body and is fixedly connected to the bottom of the mineral sample tray.

[0007] Preferably, a control console is provided on the top surface of the furnace body, and the control console is fixedly connected to the top surface of the furnace body and is connected to internal components through internal wiring.

[0008] Preferably, the temperature of the resistance wire heater inside the corundum tube can be set independently, with a maximum heating temperature of up to 1000℃, and it has a gradient or uniform temperature calcination mode.

[0009] Preferably, the flow controller array adopts a high-precision MFC with a range of 0-5L / min and an accuracy of ±1%.

[0010] Preferably, both the TDLAS oxygen concentration probe and the TDLAS SO2 gas probe employ tunable diode laser absorption spectroscopy (TDLAS), supporting the integration of multiple probes into a single device. By selecting a laser wavelength that matches the absorption peak of the target gas, highly selective measurement of multiple gases can be achieved.

[0011] Preferably, the corundum tube inner resistance wire heater is fixedly connected to the mounting base on the bottom surface inside the furnace body to isolate vibration via a bottom lining of silicon carbide fiber reinforced composite material.

[0012] Preferably, a gap is left between the vibration transmission rod and the side wall of the channel opened in the furnace bottom plate, and the gap and the gap between the vibration excitation mechanism and the furnace bottom plate are tightly filled with asbestos fiber. The vibration transmission rod and the mineral sample tray are both made of high-strength material that is resistant to high temperature and vibration.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. Compared with existing technologies, this device has an independently adjustable temperature corundum tube inner resistance wire heater inside the furnace body. It can set parameters to form a multi-temperature zone heating mode such as gradient or uniform temperature roasting. The temperature zone configuration is flexible and can realize the comparison of different roasting regimes in a single experiment. It improves the shortcomings of large-capacity muffle furnaces, which cannot finely control the temperature and have uneven heating. At the same time, it avoids the defects of low roasting efficiency and fluctuation of large-scale test results in traditional tube furnaces.

[0015] 2. Compared with the existing technology, this device transmits vibration to the material tray through a vibration excitation mechanism and a transmission rod made of high-strength material that is resistant to high temperature and vibration. This ensures that the mineral material layer thickness is uniform. At the same time, the material particles are properly rolled and fluffed by vibration at appropriate frequency and amplitude, and roasted under the set atmosphere, which helps to accurately reflect the set test conditions.

[0016] 3. Compared with existing technologies, this device, by setting up an oxygen concentration detection device, an SO2 gas concentration measuring device, and an oxygen / nitrogen flow controller array, can detect intake and exhaust data, control and adjust the oxygen concentration under set conditions, and accurately control the roasting test temperature and sulfide oxidation conditions to achieve good test results. Attached Figure Description

[0017] Figure 1 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the front cross-section structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 5 This is a partial enlarged cross-sectional view of the furnace body bottom plate of this utility model.

[0022] The attached figures are labeled as follows: 1. Furnace body; 2. Corundum tube inner resistance wire heater; 3. Mounting base; 4. Baffle plate; 5. Flow controller array; 6. Laser sensor (TDLAS) oxygen concentration probe; 7. Laser sensor (TDLAS) SO2 gas probe; 8. Opening door; 10. Mixed gas inlet; 11. Roasting tail gas exhaust port; 12. Mineral sample tray; 13. Vibration excitation mechanism; 14. Vibration transmission rod; 15. Control console; 16. Asbestos fiber. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] As attached Figure 1-4 The multi-temperature zone vibratory homogenizing gas-controlled roasting furnace shown includes a furnace body 1, a reconfigurable multi-temperature zone module, a gas distribution device, and a vibration system. The reconfigurable multi-temperature zone module consists of a corundum tube inner resistance wire heater 2 and a mounting base 3. The gas distribution device consists of a flow controller array 5, a TDLAS optical sensor oxygen concentration probe 6, a TDLAS SO2 laser sensor gas probe 7, and a baffle plate 4. The vibration system consists of a mineral sample tray 12, a vibration excitation mechanism 13, and a vibration transmission rod 14. An opening and closing door 8 is provided on the front surface of the furnace body 1, and corundum tube inner resistance wire heaters 2 are provided at the four corners of its internal bottom surface. A mixed gas inlet 10 and a roasting exhaust gas outlet 11 are provided on the rear external side of the furnace body 1. The mixed gas inlet 10 is located to the left of the roasting exhaust gas outlet 11. A baffle plate 4 is provided in the middle, and the baffle plate 4 is fixedly connected to the rear wall and top wall inside the furnace body 1. A flow controller array 5 is provided behind the mixed gas inlet 10, and the flow controller array 5 is fixedly connected to the rear side of the furnace body 1. A laser sensor TDLAS oxygen concentration probe 6 is provided below the mixed gas inlet 10, and the laser sensor TDLAS oxygen concentration probe 6 is fixedly connected to the rear side wall inside the furnace body 1. A laser sensor TDLAS SO2 gas probe 7 is provided below the roasting tail gas exhaust port 11, and the laser sensor TDLAS SO2 gas probe 7 is fixedly connected to the rear side wall inside the furnace body 1. A vibration excitation mechanism 13 is provided at the bottom of the furnace body 1, and a vibration transmission rod 14 is provided at the top of the vibration excitation mechanism 13, which extends into the furnace body 1 and is fixedly connected to the bottom of the mineral sample tray 12.

[0026] Specifically: The baffle 4 allows the oxygen / nitrogen mixture entering from the left side of the furnace body 1 to pass over the ore sample tray 12 at the bottom of the baffle 4, ensuring thorough roasting. The roasting exhaust gas flows out from the roasting exhaust port 11 on the right side of the furnace. A TDLAS (Digital Transducer Laser Sensor) oxygen concentration probe 6 detects the roasting oxygen concentration inside the furnace. Combined with the flow control array 5, the O2 / N2 ratio is automatically adjusted (e.g., when the O2 concentration inside the furnace deviates from the set value, the MFC is triggered to increase the O2 / N2 flow compensation). An SO2 gas probe detects the SO2 concentration in the roasting tail gas to record and determine the oxidation and desulfurization status of the ore sample. A micro vibration excitation mechanism 13 with controllable frequency and intensity uses a high-strength vibration guide rod 14 that is resistant to high temperature and vibration to keep the ore layer thickness uniform. At the same time, the ore sample is slowly rolled and heated evenly during roasting to avoid local over- or under-roasting. The resistance wire heater 2 inside the corundum tube is 25cm long. Some complex gold concentrates can be roasted at a gradient of 350℃-650℃ using this device, and the sulfur removal rate is increased from 80% to over 97%.

[0027] Example 2:

[0028] Based on Example 1, the solution in Example 1 will be further described in detail below, with reference to the specific working method described in detail:

[0029] like Figure 1-4 As shown, in a preferred embodiment, a control console 15 is provided on the top surface of the furnace body 1. The control console 15 is fixedly connected to the top surface of the furnace body 1 and is connected to internal components through internal wiring. Furthermore, the control console 15 can control the joint operation of various components to achieve functions.

[0030] like Figure 1 and Figure 3 As shown, in a preferred embodiment, the temperature of the inner resistance wire heater 2 of the corundum tube can be set independently, up to a maximum of 1000°C, which can form a gradient or uniform temperature roasting mode. Furthermore, the temperature of the inner resistance wire heater 2 of the corundum tube can be set independently, and the temperature zone configuration is flexible. A single experiment can compare the effects of different roasting regimes. For example, in a two-stage roasting, the first stage is generally at 350°C, and the second stage is at 650°C, etc. The heating temperature of the inner resistance wire heater 2 of the corundum tube is automatically controlled by the program.

[0031] like Figure 4 As shown, in a preferred embodiment, the flow controller array 5 adopts a high-precision MFC with a range of 0-5L / min and an accuracy of ±1%. Furthermore, it can precisely adjust the gas flow rate according to a preset ratio.

[0032] like Figure 1 and Figure 3As shown, in a preferred embodiment, the TDLAS oxygen concentration probe 6 and the TDLAS SO2 gas probe 7 use infrared spectroscopy to detect the concentration of oxygen and SO2 gas. Both adopt tunable diode laser absorption spectroscopy (TDLAS) technology, which supports the integration of multiple probes in one device. By selecting the laser wavelength that matches the absorption peak of the target gas, highly selective measurement of multiple gases can be achieved. Furthermore, it can accurately detect and feed the data back to the control unit.

[0033] like Figure 1 As shown, in a preferred embodiment, the corundum tube inner resistance wire heater 2 is fixedly connected to the mounting base 3 on the bottom surface inside the furnace body 1 by means of a bottom outer lining of silicon carbide fiber reinforced composite material to isolate vibration. Furthermore, this can significantly reduce the impact that the vibration excitation mechanism 13 may have on the corundum tube inner resistance wire heater 2 when it is working.

[0034] like Figure 5 As shown, in a preferred embodiment, a gap is left between the vibration transmission rod 14 and the side wall of the channel opened in the bottom plate of the furnace body 1. The gap and the gap between the vibration excitation mechanism 13 and the bottom plate of the furnace body 1 are both tightly filled with asbestos fibers 16. The vibration transmission rod 14 and the mineral sample tray 12 are both made of high-temperature resistant and vibration-resistant high-strength materials. Furthermore, the gap between the vibration transmission rod 14 and the side wall of the channel opened in the bottom plate of the furnace body 1 does not affect the operation of the vibration transmission rod 14. The gap is tightly filled with asbestos fibers 16, which can keep the temperature warm and isolate vibration. The vibration transmission rod 14 and the mineral sample tray 12 are both made of high-temperature resistant and vibration-resistant high-strength materials to ensure their strength in high-temperature and high-frequency vibration environments.

[0035] The working process of this utility model is as follows:

[0036] In operation, the device is first opened through the opening and closing door 8, and the mineral sample is placed and leveled in the mineral sample tray 12 on the vibration excitation mechanism 13. The opening and closing door 8 is then closed, and the nitrogen and oxygen delivery pipes are connected to the interface on the bottom rear of the flow controller array 5. The external roasting exhaust port is connected to the roasting exhaust port 11. The device is then started via the control console 15 for roasting heating. The vibration excitation mechanism 13 transmits vibration to the mineral sample tray 12 via the vibration transmission rod 14, simultaneously causing the mineral sample to tumble and tumble during roasting for uniform heating. According to the set roasting mode, the temperature of the resistance wire heater 2 inside each corundum tube rises rapidly and is adjusted to the set temperature, forming a gradient or uniform temperature mode. Roasting is carried out according to the set time. Simultaneously, under high-precision MFC control, the gas flow rate is adjusted according to a preset ratio. The TDLAS oxygen concentration probe 6 and the TDLAS SO2 gas probe 7 detect internal gas data and feed it back to the controller on the control console 15 for adjustment, which is then displayed on the screen.

[0037] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0038] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0039] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-temperature zone vibrating uniform gas-controlled roasting furnace, comprising a furnace body (1), a reconfigurable multi-temperature zone module, a gas distribution device, and a vibration system, characterized in that: The reconfigurable multi-temperature zone module consists of a corundum tube inner resistance wire heater (2) and a mounting base (3). The gas distribution device consists of a flow controller array (5), an oxygen concentration probe (6), and an SO2 gas probe (7). The vibration system consists of a mineral sample tray (12), a vibration transmission rod (14), and a vibration excitation mechanism (13). The front surface of the furnace body (1) is provided with an opening and closing door (8). The corundum tube inner resistance wire heater (2) is provided at the four corners of its inner bottom surface. The rear side of the furnace body (1) is provided with a mixed gas inlet (10) and a roasting tail gas exhaust port (11). The mixed gas inlet (10) is located to the left of the roasting tail gas exhaust port (11). A baffle plate (4) is provided between the two. The baffle plate (4) is fixedly connected to the rear wall and top wall of the furnace body (1). The flow controller is provided behind the mixed gas inlet (10). The flow controller array (5) is fixedly connected to the rear side of the furnace body (1). The oxygen concentration probe (6) is provided below the mixed gas inlet (10) and is fixedly connected to the rear side wall inside the furnace body (1). The SO2 gas probe (7) is provided below the roasting tail gas exhaust port (11) and is fixedly connected to the rear side wall inside the furnace body (1). The vibration excitation mechanism (13) is provided at the bottom of the furnace body (1). The vibration excitation mechanism (13) has a vibration damping pad at the bottom and is placed on the same platform as the furnace body (1). Vibration transmission rods (14) are provided on both sides of the top of the vibration excitation mechanism (13). The vibration transmission rods (14) pass through the reserved channel on the bottom plate of the furnace body (1) and enter the interior of the furnace body (1). The top of the rod is fixedly connected to the mineral sample tray (12).

2. The multi-temperature zone vibration uniform material gas control roasting furnace according to claim 1, characterized in that: The top surface of the furnace body (1) is provided with a control console (15), which is fixedly connected to the top surface of the furnace body (1) and is connected to internal components through internal wiring.

3. The multi-zone vibration uniformity gas control calcination furnace according to claim 1, characterized in that: The inner resistance wire heater (2) of the corundum tube achieves independent temperature control of multiple temperature zones through the array of four tubes, which can reach up to 1000℃ and can form a multi-temperature zone heating mode of gradient or uniform calcination.

4. The multi-zone vibration uniformity gas control calcination furnace according to claim 1, characterized in that: The flow controller array (5) adopts a high-precision MFC with a range of 0-5L / min and an accuracy of ±1%.

5. The multi-zone vibration uniformity gas control calcination furnace according to claim 1, characterized in that: Both the oxygen concentration probe (6) and the SO2 gas probe (7) adopt tunable diode laser absorption spectroscopy (TDLAS) technology, which supports the integration of multiple probes through one device. By selecting the laser wavelength that matches the absorption peak of the target gas, highly selective measurement of multiple gases can be achieved. The flow controller array (5) is connected to the oxygen concentration probe (6) and the SO2 gas probe (7) through a circuit.

6. The multi-zone vibration uniformity gas control calcination furnace according to claim 1, characterized in that: The corundum tube inner resistance wire heater (2) is fixedly connected to the mounting base (3) on the bottom surface inside the furnace body (1) to isolate vibration.

7. The multi-zone vibration uniformity gas control calcination furnace according to claim 1, characterized in that: The vibration transmission rod (14) and the side wall of the channel opened in the bottom plate of the furnace body (1) have gaps. The gaps and the gaps between the vibration excitation mechanism (13) and the bottom plate of the furnace body (1) are filled with asbestos fibers (16). The vibration transmission rod (14) and the mineral sample tray (12) are both made of high-temperature resistant and vibration-resistant high-strength materials.

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