Roasting device and method for pyrite magnetite concentrate processing

Abstract

The invention discloses a roasting device and method for pyrite magnetite concentrate processing. The roasting device specifically comprises a furnace body, a control panel is fixedly installed on the furnace body, a shell is fixedly installed at the bottom of the furnace body, and an air plate and a regulation and control assembly are fixedly installed in the shell; according to the invention, data in use of the roasting device can be collected to obtain a temperature normal signal and a temperature abnormal signal, and the temperature distribution condition in the furnace body can be comprehensively and efficiently supervised in the use process, that is, the collected data range and the preset data range are comprehensively analyzed and compared, so that related evaluation signals are obtained; accordingly, corresponding early warning is sent to a remote monitoring end, accurate adjustment and control over the roasting process are achieved, the temperature of an abnormal area is adjusted and controlled through cooperation of an air bag and a spray head for temperature abnormity, and the influence caused by temperature overload is fundamentally reduced.

Description

Technical Field

[0001] The present invention relates to the field of concentrate roasting, and particularly to a roasting device and method for processing pyrite magnetite concentrate. Background Art

[0002] In the processing of pyrite and magnetite concentrate, the roasting device is a key piece of equipment used to change the chemical composition of minerals through high-temperature oxidation or reduction reactions, facilitating the subsequent extraction of valuable metals (such as iron, sulfur, etc.). Usually, pyrite and magnetite concentrate are roasted in a fluidized bed furnace.

[0003] However, during the use of the existing roasting devices, in the traditional fluidized bed roasting furnace of the conventional process, the fluidized bed is prone to local overheating due to uneven material distribution, resulting in slag caking or insufficient magnetic conversion; and in the cooling section, a fixed spraying system is mostly used, which cannot achieve dynamic adaptation to the distribution of high-temperature slag, and is prone to problems such as uneven cooling and waste of water resources. Therefore, a solution is proposed herein. Summary of the Invention

[0004] The purpose of the present invention is to provide a roasting device and method for processing pyrite magnetite concentrate to solve the technical defects proposed in the background art.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A roasting device for processing pyrite magnetite concentrate includes a furnace body, on which a control panel is fixedly installed, an exhaust pipe is fixedly installed on one side of the furnace body, a housing is fixedly installed at the bottom of the furnace body, an air inlet pipe is fixedly installed on one side of the housing, and a wind plate and a regulation component are fixedly installed inside the housing;

[0006] The regulation component includes a wind cap, an airbag, and a fixed pipe. The wind cap is fixedly installed on the wind plate, the airbag is fixedly installed inside the wind cap, the fixed pipe is fixedly connected to the inner wall of the furnace body, a water inlet pipe is fixedly installed on one side of the fixed pipe, a spray head is fixedly installed at the bottom of the fixed pipe, and an air inlet pipe is fixedly connected to one side of the wind plate;

[0007] The control panel includes a server, a temperature monitoring module, and a remote supervision terminal.

[0008] Preferably, a feed pipe is fixedly installed on one side of the furnace body, the feed pipe is located above the wind plate, there are multiple wind caps, the multiple wind caps are evenly spaced on the wind plate, and multiple ventilation holes are opened on the wind caps.

[0009] Preferably, an air inlet pipe is fixedly connected to one side of the wind plate, the air inlet pipe is fixedly connected to the airbag, a guiding rib is fixedly installed inside the furnace body, the guiding rib is spiral, and the guiding rib is located between the exhaust pipe and the fixed pipe.

[0010] Preferably, a through groove is formed in the fixed pipe. The fixed pipe is communicated with the nozzle through the through groove. A sealing plate is movably installed on the through groove. A permanent magnet block is fixedly installed on one side of the sealing plate. An electromagnetic block is fixedly installed on the inner wall of the fixed pipe. The electromagnetic block is located on one side of the permanent magnet block. There are multiple through grooves, and the multiple through grooves are evenly spaced in the fixed pipe.

[0011] Preferably, the temperature monitoring module is used to monitor the roasting environment in the furnace body, generate a normal temperature signal or an abnormal temperature signal through process analysis, and send the abnormal temperature signal to the remote supervision end through the server;

[0012] When the remote supervision end receives the abnormal temperature signal, it immediately controls the airbag and the nozzle to work and issues a corresponding warning.

[0013] Preferably, the specific operation process of the temperature monitoring module includes:

[0014] Divide the internal area of the furnace body, collect the roasting temperature data of each area, calculate the average value of all temperature data within a unit time to obtain the temperature average value. Take time as the X-axis and the collected temperature average value data as the Y-axis to construct multiple coordinate systems, mark the temperature average value data within a unit time on the coordinate system, and draw the set threshold value on the coordinate system;

[0015] If the impurity concentration data fluctuates, it will show an upward float on the coordinate system. That is, calculate the area of the floating waveform deviation region between the temperature average value data curve and the threshold curve. The area of the floating waveform deviation region within a unit time is the deviation value;

[0016] If the deviation value exceeds the set threshold and continues to increase, it is inferred that the roasting temperature in the current corresponding area is abnormal, then an abnormal temperature signal is generated, and the abnormal temperature signal is sent to the remote supervision end through the server.

[0017] The present invention also provides a roasting method for pyrite magnetite concentrate processing, including the following steps:

[0018] Step 1: Add pyrite and magnetite concentrate with 8% water content into 2 intermediate bins with a volume of 60 cubic meters and a storage time of about 4 hours. Then, use a throwing machine to convey the materials from the feed pipe to the furnace body;

[0019] Step 2: Roast pyrite and magnetite concentrate, and input primary air into the furnace body through the air inlet pipe, air plate and air cap to keep pyrite and magnetite concentrate in a suspended state;

[0020] Step 3: Regulate the roasting process through the control panel, and at the same time collect the flue gas during roasting. The slag leaves the furnace body with the flue gas, and the remaining slag is discharged from the overflow port on the premise of keeping the furnace bed level.

[0021] The beneficial effects of the present invention are as follows:

[0022] (1) The present invention uses components such as air plates, air caps, and air bags in combination. Airflow is transported into the housing through the air inlet pipe, and the airflow passes through the air cap and enters the furnace body, thereby keeping the materials in a suspended state, improving the roasting efficiency of the materials. At the same time, when uneven combustion occurs inside the furnace body, the expansion and contraction of the air bag are used to adjust the gas flow rate in the corresponding area, avoiding local overheating and caking or insufficient desulfurization at low temperatures. At the same time, the spray heads are partially opened in real time according to the temperature distribution of the slag, effectively reducing the water consumption of the cooling water, and avoiding the uneven problem of "overcooling or overheating" of traditional fixed spraying, effectively improving the roasting efficiency;

[0023] (2) The present invention also collects and accurately evaluates the identified features during the operation of the furnace body, combines the influence of the collected data itself and the influence on the furnace body, improves the pertinence of the control of the roasting device, and can quickly locate according to the data collection results when a fault occurs. It can also control the corresponding structure to perform compensatory operations according to the evaluation results, fundamentally reducing the influence brought by the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present invention with reference to the drawings;

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is a schematic structural diagram of the furnace body in the present invention;

[0027] Figure 3 is a schematic structural diagram of the interior of the furnace body in the present invention;

[0028] Figure 4 is a schematic structural diagram of the air plate in the present invention;

[0029] Figure 5 is a schematic structural diagram of the air cap in the present invention;

[0030] Figure 6 is a schematic structural diagram of the air bag in the present invention;

[0031] Figure 7 is a schematic structural diagram of the fixed pipe in the present invention;

[0032] Figure 8 is a schematic structural diagram of the sealing plate in the present invention;

[0033] Figure 9 is a system block diagram of the present invention;

[0034] Figure 10 is a schematic process flow diagram of the present invention.

[0035] Legend: 1. Furnace body; 11. Exhaust pipe; 12. Housing; 13. Air inlet pipe; 14. Air plate; 15. Feed pipe; 2. Regulation component; 21. Air cap; 22. Airbag; 23. Fixed pipe; 24. Water inlet pipe; 25. Sprinkler; 26. Air inlet pipe; 27. Ventilation hole; 28. Flow guiding rib; 29. Through groove; 30. Sealing plate; 31. Permanent magnet block; 32. Electromagnetic block; 3. Control panel. Specific implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1: Please refer to Figure 1 - Figure 8 As shown in the figure, this embodiment is a roasting device for processing pyrite magnetite concentrate, including a furnace body 1, on which a control panel 3 is fixedly installed, an exhaust pipe 11 is fixedly installed on one side of the furnace body 1, a housing 12 is fixedly installed at the bottom of the furnace body 1, an air inlet pipe 13 is fixedly installed on one side of the housing 12, and an air plate 14 and a regulation component 2 are fixedly installed inside the housing 12.

[0038] The regulation component 2 includes an air cap 21, an airbag 22 and a fixed pipe 23. The air cap 21 is fixedly installed on the air plate 14, the airbag 22 is fixedly installed inside the air cap 21, the fixed pipe 23 is fixedly connected to the inner wall of the furnace body 1, a water inlet pipe 24 is fixedly installed on one side of the fixed pipe 23, a sprinkler 25 is fixedly installed at the bottom of the fixed pipe 23, and an air inlet pipe 26 is fixedly connected to one side of the air plate 14;

[0039] A feed pipe 15 is fixedly installed on one side of the furnace body 1, the feed pipe 15 is located above the air plate 14, there are multiple air caps 21, and the multiple air caps 21 are evenly spaced on the air plate 14. Multiple ventilation holes 27 are provided on the air cap 21. The material is conveyed into the furnace body 1 through the feed pipe 15. An air inlet pipe 26 is fixedly connected to one side of the air plate 14, and the air inlet pipe 26 is fixedly connected to the airbag 22. The expansion and contraction of the airbag 22 are controlled through the air inlet pipe 26. The air inlet and outlet modes of the airbag 22 are all prior arts, and their specific types and connection methods will not be elaborated here.

[0040] Inside the furnace body 1, a flow guiding rib 28 is fixedly installed. The flow guiding rib 28 is spiral and is located between the exhaust pipe 11 and the fixed pipe 23. When the air flow inside the furnace body 1 rises, it contacts the flow guiding rib 28, and the air flow is guided by the flow guiding rib 28 to rise spirally. On the one hand, the slag inside the furnace body 1 is agitated to make it dispersed, ensuring uniform roasting. On the other hand, the air flow velocity is effectively increased, promoting gas discharge.

[0041] That is, air flow is conveyed into the housing 12 through the air inlet pipe 13. The air flow passes through the air cap 21 and enters the furnace body 1, so as to keep the materials in a suspended state, improving the roasting efficiency of the materials. At the same time, when uneven combustion occurs inside the furnace body 1, the expansion and contraction of the air bag 22 are used to adjust the gas flow velocity in the corresponding area, avoiding local overheating and caking or insufficient desulfurization at low temperature. At the same time, the nozzle 25 is partially opened in real time according to the temperature distribution of the slag, effectively reducing the water consumption of the cooling water, and avoiding the "over-cooling or over-heating" uneven problem of the traditional fixed spraying, thereby effectively improving the roasting efficiency of the roasting device.

[0042] Embodiment 2: Please refer to Figure 9 - Figure 10 As shown in the figure, the present invention further includes a control panel 3. The control panel 3 includes a server, a temperature monitoring module and a remote supervision terminal.

[0043] The temperature monitoring module is used to monitor the roasting environment in the furnace body 1, generate a normal temperature signal or an abnormal temperature signal through process analysis, and send the abnormal temperature signal to the remote supervision terminal through the server;

[0044] The specific operation process of the temperature monitoring module includes:

[0045] The internal area of the furnace body 1 is divided, and the roasting temperature data of each area is collected. The roasting temperature data is obtained by collecting through a plurality of temperature sensors fixedly installed in the furnace body 1. The furnace body 1 is divided into a plurality of detection areas by the plurality of temperature sensors, and the average value of all temperature data per unit time is calculated to obtain the temperature average value. Taking time as the X-axis and the collected temperature average value data as the Y-axis, a plurality of coordinate systems are constructed. The number of coordinate systems is related to the number of divided areas, and the temperature average value data per unit time is marked on the coordinate system, and the set threshold is drawn in the coordinate system;

[0046] If the impurity concentration data fluctuates, it will show an upward float on the coordinate system, that is, the area of the floating waveform deviation region between the temperature average value data curve and the threshold curve is calculated. The area of the floating waveform deviation region per unit time is the deviation value;

[0047] If the deviation value exceeds the set threshold and continues to increase, it is inferred that there is an abnormality in the roasting temperature of the current corresponding area, and a temperature anomaly signal is generated. The temperature anomaly signal is sent to the remote supervision terminal through the server.

[0048] When the remote supervision terminal receives the temperature anomaly signal, it immediately controls the airbag 22 and the nozzle 25 to work and issues a corresponding warning.

[0049] Among them, the working principles of the airbag 22 and the nozzle 25 are as follows:

[0050] A through groove 29 is provided in the fixed pipe 23. The fixed pipe 23 is communicated with the nozzle 25 through the through groove 29. A sealing plate 30 is movably installed on the through groove 29. A permanent magnet block 31 is fixedly installed on one side of the sealing plate 30. An electromagnetic block 32 is fixedly installed on the inner wall of the fixed pipe 23. The electromagnetic block 32 is located on one side of the permanent magnet block 31. There are multiple through grooves 29, and the multiple through grooves 29 are evenly spaced in the fixed pipe 23;

[0051] Then, the remote supervision terminal judges the abnormal area and controls the electromagnetic block 32 in this area to be energized. At this time, the electromagnetic block 32 generates an attractive force on the permanent magnet block 31, thereby driving the sealing plate 30 to move. When the through groove 29 is in an open state, the liquid enters the nozzle 25 from the fixed pipe 23, and the abnormal area is sprayed and cooled through the nozzle 25. After the temperature returns to normal, a reverse current is passed through the electromagnetic block 32. At this time, the electromagnetic block 32 generates a repulsive force on the permanent magnet block 31, pushing the sealing plate 30 to reset, thereby realizing directional regulation.

[0052] That is, during the operation of the furnace body 1, the extracted and identified features are collected to accurately evaluate the influence of the data. Combining the influence of the collected data itself and the influence on the furnace body 1, the pertinence of the control of the roasting device is improved. When a fault occurs, it can be quickly located according to the data collection results, and corresponding structures can also be controlled to perform compensatory operations according to the evaluation results, fundamentally reducing the influence brought by the fault, improving the operation efficiency of the roasting device, and at the same time minimizing the failure rate of the roasting device, with a relatively high degree of intelligence.

[0053] Combining Embodiment 1 and Embodiment 2, it can not only collect the data during the use of the roasting device to obtain the normal temperature signal and the temperature anomaly signal, and comprehensively and efficiently supervise the temperature distribution in the furnace body 1 during the use process, that is, comprehensively analyze and compare the collected data range with the preset data range, so as to obtain relevant evaluation signals, and accordingly issue corresponding warnings to the remote supervision terminal, realizing precise adjustment and control of the roasting process, and for temperature anomalies, through the cooperation of the airbag 22 and the nozzle 25, the temperature of the abnormal area is regulated, fundamentally reducing the influence brought by temperature overload.

[0054] The working process and principle of the present invention are as follows:

[0055] Step 1: Add pyrite and magnetite concentrate with 8% water content into two intermediate bins with a volume of 60 cubic meters and a storage time of about 4 hours. Then, convey the materials from the feed pipe 15 to the furnace body 1 through a throwing machine.

[0056] Step 2: Roast the pyrite and magnetite concentrate, and input primary air into the furnace body 1 through the air inlet pipe 13, air plate 14 and air cap 21 to keep the pyrite and magnetite concentrate in a suspended state.

[0057] Step 3: Regulate the roasting process through the control panel 3, and collect the flue gas during roasting at the same time. The slag leaves the furnace body 1 with the flue gas, and the remaining slag is discharged from the overflow port on the premise of keeping the furnace bed level.

[0058] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific implementation manners. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A roasting device for processing pyrite magnetite concentrate, comprising a furnace body (1), characterized in that: A control panel (3) is fixedly mounted on the furnace body (1); an exhaust pipe (11) is fixedly mounted on one side of the furnace body (1); a shell (12) is fixedly mounted on the bottom of the furnace body (1); an air inlet pipe (13) is fixedly mounted on one side of the shell (12); and an air plate (14) and a regulating component (2) are fixedly mounted inside the shell (12); The regulating component (2) comprises a hood (21), an air bag (22) and a fixed pipe (23); the hood (21) is fixedly mounted on the wind plate (14); the air bag (22) is fixedly mounted inside the hood (21); the fixed pipe (23) is fixedly connected to the inner wall of the furnace body (1); a water inlet pipe (24) is fixedly mounted on one side of the fixed pipe (23); a nozzle (25) is fixedly mounted on the bottom of the fixed pipe (23); and an air inlet pipe (26) is fixedly connected to one side of the wind plate (14); The control panel (3) comprises a server, a temperature monitoring module and a remote monitoring terminal.

2. A roasting device for processing pyrite magnetite concentrate according to claim 1, characterized in that: A feed pipe (15) is fixedly mounted on one side of the furnace body (1), and the feed pipe (15) is located above the wind plate (14). A plurality of wind caps (21) are provided, and the plurality of wind caps (21) are evenly spaced and distributed on the wind plate (14). A plurality of ventilation holes (27) are provided on the wind caps (21).

3. A roasting device for processing pyrite magnetite concentrate according to claim 2, characterized in that: An air intake pipe (26) is fixedly connected to one side of the air plate (14), and the air intake pipe (26) is fixedly connected to the air bag (22). A guide rib (28) is fixedly installed inside the furnace body (1), and the guide rib (28) is spiral-shaped. The guide rib (28) is located between the exhaust pipe (11) and the fixed pipe (23).

4. A roasting device for processing pyrite magnetite concentrate according to claim 3, characterized in that: A through slot (29) is provided in the fixed tube (23), and the fixed tube (23) is connected to the nozzle (25) through the through slot (29). A sealing plate (30) is movably mounted on the through slot (29), and a permanent magnet block (31) is fixedly mounted on one side of the sealing plate (30). An electromagnetic block (32) is fixedly mounted on the inner wall of the fixed tube (23), and the electromagnetic block (32) is located on one side of the permanent magnet block (31). A plurality of through slots (29) are provided, and the plurality of through slots (29) are evenly spaced and distributed in the fixed tube (23).

5. A roasting device for processing pyrite magnetite concentrate according to claim 1, characterized in that: The temperature monitoring module is used to monitor the roasting environment in the furnace body (1), generate a normal temperature signal or an abnormal temperature signal through process analysis, and send the abnormal temperature signal to the remote monitoring terminal via the server; When the remote monitoring terminal receives the abnormal temperature signal, it immediately controls the air bag (22) and the nozzle (25) to work and issues a corresponding warning.

6. A roasting device for processing pyrite magnetite concentrate according to claim 5, characterized in that: The specific operation process of the temperature monitoring module includes: The furnace body (1) is divided into regions, and roasting temperature data of each region is collected. All temperature data within a unit time are averaged to obtain a temperature average. Time is used as an X-axis and the collected temperature average data is used as a Y-axis to construct multiple coordinate systems. The temperature average data within a unit time is marked on the coordinate system, and the set threshold value is plotted in the coordinate system. If the impurity concentration data fluctuates, it will float up on the coordinate system, that is, the area of ​​the floating waveform deviation region between the temperature mean data curve and the threshold curve is calculated, and the area of ​​the floating waveform deviation region per unit time is the deviation value; If the deviation value exceeds the set threshold and continues to increase, it is inferred that there is an abnormality in the roasting temperature of the current corresponding area, and a temperature abnormality signal is generated, and the temperature abnormality signal is sent to the remote monitoring end via the server.

7. A roasting method for processing pyrite magnetite concentrate, using a roasting device for processing pyrite magnetite concentrate as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Pyrite and magnetite concentrates with a water content of 8% are added into two intermediate silos with a volume of 60 cubic meters and a storage time of about 4 hours, and then the materials are transported from the feed pipe (15) to the furnace body (1) by a throwing machine; Step 2: roasting pyrite and magnetite concentrate, and inputting primary air into the furnace body (1) through the air inlet pipe (13), the air plate (14) and the air cap (21), so that the pyrite and magnetite concentrate remain in a suspended state; Step 3: The roasting process is regulated by the control panel (3), and the smoke during roasting is collected at the same time. The slag leaves the furnace body (1) along with the smoke, and the remaining slag is discharged from the overflow port while keeping the furnace bed level.

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