Rotary kiln production method

Abstract

The present invention provides a rotary kiln production method. The system comprises: a rotary kiln, a parameter controller, a kiln head iron-containing material composition analyzer disposed at the kiln head, multiple kiln body temperature measuring devices disposed within the rotary kiln body at preset intervals from the kiln head, a kiln body temperature analyzer electrically connected to the kiln body temperature measuring devices, and a gas temperature analyzer and a gas composition analyzer disposed at the kiln tail. The kiln head iron-containing material composition analyzer, the kiln body temperature analyzer, the gas temperature analyzer, and the gas composition analyzer are all electrically connected to the parameter controller. The production control parameters of the parameter controller include carbon dosage, rotary kiln rotational speed, and blast volume. The present invention provides higher system operational controllability and significantly improves the automation level of rotary kiln production operations.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste treatment, and in particular to a rotary kiln production method. Background Art

[0002] my country's steel industry generates up to 80 million tons of dust and sludge waste annually, rich in zinc, iron, carbon, and other elements. Utilizing this waste not only recovers valuable metals but also mitigates environmental pollution caused by the steel industry's development. Rotary kilns can be used to dispose of the large amounts of zinc- and iron-rich dust and sludge generated during steel production.

[0003] At present, the production operation of rotary kilns is mostly "extensive" operation based on experience. The judgment of the production process and the control of product quality are in a disordered state. There are many problems, such as frequent ring formation, unstable control of key indicators such as dezincification rate, low fuel utilization rate and low zinc recovery rate. There is an urgent need for a rotary kiln production system with good control effect. Summary of the Invention

[0004] The embodiment of the present invention provides a rotary kiln production method to solve the problem of poor control effect in rotary kiln production in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a rotary kiln production system, comprising a rotary kiln, a parameter controller, a kiln head iron-containing material composition analyzer disposed at a kiln head of the rotary kiln, a plurality of kiln body temperature measuring devices disposed within the rotary kiln body at preset intervals from the kiln head, a kiln body temperature analyzer electrically connected to the kiln body temperature measuring devices, a gas temperature analyzer disposed at a kiln tail of the rotary kiln, and a gas composition analyzer;

[0006] The kiln head iron-containing material composition analysis device, kiln body temperature analysis device, gas temperature analysis device and gas composition analysis device are all electrically connected to the parameter controller; wherein, the production control parameters of the parameter controller include carbon dosage, rotary kiln speed and blast volume.

[0007] In a possible implementation, the kiln body temperature analysis device includes a temperature compensation device, which is electrically connected to a speed sensor for measuring the air flow speed in the kiln body.

[0008] In a second aspect, an embodiment of the present invention provides a rotary kiln production method, which is applied to the rotary kiln production system as described in the first aspect, and the method includes:

[0009] The kiln head iron-containing material composition analysis device sends the iron-containing material composition information to the parameter controller, the kiln body temperature analysis device sends the kiln body temperature information to the parameter controller, the gas temperature analysis device sends the gas temperature information to the parameter controller, and the gas composition analysis device sends the gas composition information to the parameter controller;

[0010] The parameter controller adjusts the production control parameters according to the iron-containing material composition information, kiln body temperature information, gas temperature information, and gas composition information.

[0011] In a possible implementation, the kiln temperature analysis device sends the kiln temperature information to the parameter controller, including:

[0012] The temperature compensation device generates temperature compensation information based on speed information received from a speed sensor for measuring the speed of air flow in the kiln body;

[0013] The kiln body temperature analyzing device generates kiln body temperature information based on the temperature compensation information and the temperature measurement values ​​of the plurality of kiln body temperature measuring devices, and transmits the kiln body temperature information to the parameter controller.

[0014] In one possible implementation, the parameter controller adjusts the production control parameters according to the iron-containing material composition information, kiln body temperature information, gas temperature information, and gas composition information, including:

[0015] The parameter controller determines whether the composition of the iron-containing material is abnormal based on the composition information of the iron-containing material; if the composition of the iron-containing material is abnormal, the production control parameters are adjusted;

[0016] The parameter controller determines whether the kiln temperature is abnormal based on the kiln temperature information; if the kiln temperature is abnormal, the production control parameters are adjusted;

[0017] The parameter controller determines whether the gas temperature is abnormal based on the gas temperature information; if the gas temperature is abnormal, the production control parameters are adjusted;

[0018] The parameter controller determines whether the gas composition is abnormal based on the gas composition information; if the gas composition is abnormal, the production control parameters are adjusted.

[0019] In one possible implementation, the parameter controller determines whether the composition of the iron-containing material is abnormal based on the composition information of the iron-containing material, including:

[0020] The parameter controller calculates the total iron content of the material in the kiln body based on the composition information of the iron-containing material; if the absolute value of the difference between the total iron content value and the preset total iron content value is greater than the preset threshold, the composition of the iron-containing material is judged to be abnormal;

[0021] Alternatively, the parameter controller calculates the fluctuation rate of the residual carbon content of the material in the kiln body according to the composition information of the iron-containing material; if the fluctuation rate of the residual carbon content is greater than a first preset fluctuation rate, it is determined that the composition of the iron-containing material is abnormal;

[0022] Alternatively, the parameter controller calculates the zinc content of the material in the kiln body based on the composition information of the iron-containing material; if the zinc content is greater than a preset zinc content, it is determined that the composition of the iron-containing material is abnormal;

[0023] Alternatively, the parameter controller calculates the dezincification rate of the material in the kiln body according to the composition information of the iron-containing material; if the dezincification rate is less than a preset dezincification rate, it is determined that the composition of the iron-containing material is abnormal.

[0024] In a possible implementation, the parameter controller determines whether the kiln temperature is abnormal based on the kiln temperature information, including:

[0025] Use the following formula to determine whether the kiln temperature is abnormal:

[0026]

[0027] Among them, x i is the temperature measurement value of the target kiln body temperature measuring device, is the average value of n temperature measurement values ​​of the target kiln body temperature measurement device, where i and n are both positive integers;

[0028] when When the kiln body temperature corresponding to the target kiln body temperature measuring device is determined to be abnormal.

[0029] In one possible implementation, the parameter controller determines whether the gas temperature is abnormal based on the gas temperature information, including:

[0030] The parameter controller calculates the fluctuation rate of the gas temperature at the kiln tail according to the gas temperature information; if the fluctuation rate of the gas temperature is greater than a second preset fluctuation rate, the gas temperature is determined to be abnormal.

[0031] In one possible implementation, the parameter controller determines whether the gas composition is abnormal based on the gas composition information, including:

[0032] The parameter controller calculates the fluctuation rate of the target gas composition at the kiln tail according to the gas composition information; if the fluctuation rate of the target gas composition is greater than a third preset fluctuation rate, the gas composition is judged to be abnormal;

[0033] The target gas components include carbon monoxide, carbon dioxide or oxygen.

[0034] In a third aspect, an embodiment of the present invention provides a rotary kiln production method, which is applied to the rotary kiln production system as described in the first aspect, and the method includes:

[0035] When the iron-containing material component analysis device at the kiln head detects that the composition of the iron-containing material is abnormal, the detection information of the abnormal composition of the iron-containing material is sent to the parameter controller; the parameter controller adjusts the production control parameters according to the detection information of the abnormal composition of the iron-containing material;

[0036] When the kiln temperature analysis device detects that the kiln temperature is abnormal, the detection information of the kiln temperature being abnormal is sent to the parameter controller; the parameter controller adjusts the production control parameters according to the detection information of the kiln temperature being abnormal;

[0037] When the gas temperature analysis device detects that the gas temperature is abnormal, the detection information of the abnormal gas temperature is sent to the parameter controller; the parameter controller adjusts the production control parameters according to the detection information of the abnormal gas temperature;

[0038] When the gas composition analysis device detects that the gas composition is abnormal, the detection information that the gas composition is abnormal is sent to the parameter controller; the parameter controller adjusts the production control parameters according to the detection information that the gas composition is abnormal.

[0039] The embodiment of the present invention provides a rotary kiln production method, which can provide multi-factor measurement, analysis and judgment functions according to the changes in the temperature field of the rotary kiln body, the main components of the iron-containing material at the kiln head and the main components of the kiln tail gas through the kiln body temperature measuring device, the kiln body temperature analysis device, the kiln head iron-containing material composition analysis device, the kiln tail gas composition analysis device and the kiln tail gas temperature analysis device, thereby providing basic conditions for precise operation. In this way, through multi-factor analysis and judgment, the blast volume, carbon content, rotary kiln speed and other operating parameters are adjusted in time, and on the premise of ensuring that the dezincification rate meets the needs of iron-containing material users, carbon consumption is reduced and low-carbon operation is achieved; at the same time, through precise batching, the iron-containing material is fully consumed, ensuring that no secondary solid waste pollution is generated, and the goals of low consumption, low carbon emissions and full reuse of iron-containing materials are achieved.

[0040] Compared with the existing rotary kiln production system, the rotary kiln production system provided by the embodiment of the present invention has higher system operation controllability, can change the current backward state of rotary kiln production that is overly dependent on manual experience operation, and greatly improves the automation level of rotary kiln production operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 11 is a structural schematic diagram of a rotary kiln production system provided by an embodiment of the present invention;

[0043] Figure 2 1 is a schematic structural diagram of another rotary kiln production system provided by an embodiment of the present invention;

[0044] Figure 3 This is a flow chart of a rotary kiln production method provided by an embodiment of the present invention;

[0045] Figure 4 The present invention provides a rotary kiln production process flow chart. DETAILED DESCRIPTION

[0046] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below with reference to the accompanying drawings.

[0048] The current mainstream method for treating zinc-containing solid waste is pyrometallurgical processing. This process fully utilizes the residual carbon in the solid waste, using it as a heat source and reducing agent during the reduction of zinc and iron oxides. Rotary kilns in pyrometallurgical processes offer advantages such as low capital and operating costs. They are suitable for treating the large amounts of zinc- and iron-rich dust or sludge generated during steel production.

[0049] Currently, the rotary kiln process for treating zinc-containing dust from steel mills suffers from outdated equipment, crude operations, and a failure to fully utilize its low-cost advantages. In particular, this "extensive" operation, based on experience, results in frequent ring formation, unstable control of key indicators such as dezincification rates, low fuel utilization, and low zinc recovery rates. This significantly restricts the development of rotary kiln technology for treating zinc-containing solid waste from steel mills. Therefore, a rotary kiln production system with improved control performance is urgently needed.

[0050] In order to solve the problems in the prior art, the present invention provides a rotary kiln production system and production method. The rotary kiln production system provided by the present invention is first introduced below.

[0051] Figure 1This is a schematic diagram of the structure of a rotary kiln production system provided in an embodiment of the present invention. The rotary kiln production system includes a rotary kiln 11, a parameter controller 12, a kiln head iron-containing material composition analyzer 13 disposed at the kiln head of the rotary kiln, multiple kiln body temperature measuring devices 14 disposed within the kiln body at preset intervals from the kiln head, a kiln body temperature analyzer 15 electrically connected to the kiln body temperature measuring devices 14, and a gas temperature analyzer 16 and a gas composition analyzer 17 disposed at the kiln tail of the rotary kiln. The kiln head iron-containing material composition analyzer 13, the kiln body temperature analyzer 15, the gas temperature analyzer 16, and the gas composition analyzer 17 are all electrically connected to the parameter controller 12, and the electrical connection can be a cable connection or a wireless connection.

[0052] In some embodiments, the production control parameters of the parameter controller include carbon dosage, rotary kiln speed, and blast volume. The parameter controller can control one or more of the carbon dosage, rotary kiln speed, or blast volume based on relevant information transmitted by a kiln head iron-containing material composition analyzer, a kiln body temperature analyzer, a gas temperature analyzer, and a gas composition analyzer.

[0053] In some embodiments, the kiln head iron-containing material composition analysis device can detect the content of important element components such as total iron TFe, carbon C, zinc Zn, etc. of the dezincified kiln head iron-containing material after reduction at a pre-set time or when the charge is adjusted. Then, the kiln head iron-containing material composition analysis device or parameter controller determines whether the composition of the iron-containing material is abnormal. If it is abnormal, the corresponding production control parameters are adjusted based on the preset method.

[0054] In some embodiments, the kiln temperature measurement device can be an infrared thermometer or a sheathed thermocouple. The preset spacing between the kiln temperature measurement devices can be selected based on the size of the rotary kiln. For example, a kiln temperature measurement device can be placed at intervals of 1 or 2 meters from the kiln head as a temperature measurement point. The kiln temperature measurement device can measure the temperature in real time or periodically. After the kiln temperature is measured, the temperature data is transmitted to the kiln temperature analysis device.

[0055] Optional, such as Figure 2 As shown, the kiln body temperature analysis device 15 includes a temperature compensation device 18, and the temperature compensation device 15 is electrically connected to a speed sensor 19 for measuring the air flow speed in the kiln body.

[0056] Specifically, the temperature compensation device can generate temperature compensation information based on speed information received from a speed sensor used to measure the air flow velocity within the kiln, for example, through manual experience or automatic adjustment using a self-learning method. The temperature compensation device then transmits this temperature compensation information to the kiln temperature analysis device. The kiln temperature analysis device can generate kiln temperature information based on this temperature compensation information and temperature measurements from multiple kiln temperature measurement devices, and transmit this kiln temperature information to the parameter controller. By setting temperature compensation, fine-tuning can be performed based on actual conditions, further improving the accuracy of kiln temperature information.

[0057] In some embodiments, the gas temperature analysis device can generate gas temperature information at the kiln tail and send the gas temperature information at the kiln tail to the parameter controller. Specifically, the gas temperature analysis device can use the same equipment and data processing method as the kiln body temperature analysis device.

[0058] In some embodiments, the above-mentioned kiln head iron-containing material composition analysis device, kiln body temperature analysis device, and gas temperature analysis device can be customized and integrated according to the above description. For example, the industrial computer and the corresponding analysis module can be integrated, and the corresponding analysis module can be designed and generated according to the above functional description.

[0059] In some embodiments, the gas composition analysis device may be a gas analyzer, which may analyze carbon monoxide, carbon dioxide, and oxygen, and may obtain the content of the analyzed gases in the area. The gas composition analysis device may generate gas composition information at the kiln tail and transmit the gas composition information at the kiln tail to the parameter controller.

[0060] Optionally, the rotary kiln production system may further include a display device that can be electrically connected to the kiln head iron-containing material composition analysis device, the kiln body temperature measurement device, the gas temperature analysis device, and the gas composition analysis device. The display device can display relevant analysis information from each connected device to prompt the operator, allowing the operator to make relevant preparations in advance.

[0061] A production method of a rotary kiln production system provided by an embodiment of the present invention is introduced below.

[0062] Figure 3 A flowchart of a rotary kiln production method provided in an embodiment of the present invention is described in detail as follows:

[0063] Step 301: The kiln head iron-containing material composition analysis device sends the iron-containing material composition information to the parameter controller, the kiln body temperature analysis device sends the kiln body temperature information to the parameter controller, the gas temperature analysis device sends the gas temperature information to the parameter controller, and the gas composition analysis device sends the gas composition information to the parameter controller.

[0064] It should be noted that the description in step 301 does not limit the order of information sending by the kiln head iron-containing material composition analysis device, the kiln body temperature analysis device, the gas temperature analysis device, and the gas composition analysis device. The information sending processing of the above devices, such as scheduled sending or periodic sending, can be set according to the actual production situation.

[0065] Step 302: The parameter controller adjusts the production control parameters according to the iron-containing material composition information, the kiln body temperature information, the gas temperature information, and the gas composition information.

[0066] The parameter controller can respectively make abnormal judgments on the iron-containing material composition information, kiln body temperature information, gas temperature information, and gas composition information. In the event of an abnormality, the control parameters can be adjusted accordingly.

[0067] Specifically, the parameter controller determines whether the composition of the iron-containing material is abnormal based on the iron-containing material composition information; if so, the production control parameters are adjusted. The parameter controller determines whether the kiln temperature is abnormal based on the kiln temperature information; if so, the production control parameters are adjusted. The parameter controller determines whether the gas temperature is abnormal based on the gas temperature information; if so, the production control parameters are adjusted. The parameter controller determines whether the gas composition is abnormal based on the gas composition information; if so, the production control parameters are adjusted.

[0068] In some embodiments, if the gas temperature or gas composition is abnormal, the blast volume and carbon dosage are adjusted, and then corresponding operation instructions are input to perform the generation operation.

[0069] In some embodiments, if the kiln body temperature is abnormal, the control parameters can be adjusted according to the following process: Analyze whether the rotary kiln has formed rings. That is, if the temperature of a certain part of the kiln body is low, it can be considered that the area may form rings. At this time, a comprehensive analysis is further performed based on other operating phenomena to determine whether rings have formed. If it is determined that rings have formed, the ring-forming operation is carried out. After the ring-forming operation is carried out, the operating parameters are adjusted and the operation is carried out according to the corresponding operating instructions. If it is determined that there are no rings, it is further determined whether the carbon blending is abnormal. If it is abnormal, the corresponding operating parameters are adjusted and the corresponding operating instructions are issued. If the kiln body temperature is not abnormal, the operating parameters are adjusted by adjusting other production control parameters such as the blast volume and the rotary kiln speed, and the production operation is continued by issuing the corresponding operating instructions.

[0070] In some embodiments, whether the iron-containing material is abnormal can be judged based on one or more dimensions of the total iron content value, residual carbon fluctuation rate, zinc content, and dezincification rate of the material in the kiln body.

[0071] Specifically, the parameter controller can calculate the total iron content of the material in the kiln body based on the iron-containing material composition information; if the absolute value of the difference between the total iron content value and the preset total iron content value is greater than the preset threshold value, the composition of the iron-containing material is judged to be abnormal. The parameter controller can calculate the fluctuation rate of the residual carbon amount of the material in the kiln body based on the iron-containing material composition information; if the fluctuation rate of the residual carbon amount is greater than the first preset fluctuation rate, the composition of the iron-containing material is judged to be abnormal. The parameter controller can calculate the zinc content of the material in the kiln body based on the iron-containing material composition information; if the zinc content is greater than the preset zinc content, the composition of the iron-containing material is judged to be abnormal. The parameter controller can calculate the dezincification rate of the material in the kiln body based on the iron-containing material composition information; if the dezincification rate is less than the preset dezincification rate, the composition of the iron-containing material is judged to be abnormal.

[0072] In some embodiments, the zinc content of the material in the kiln body can be calculated according to the following formula:

[0073] Zinc content of iron-containing materials (%) = {mass of mixture (kg) × zinc content of mixture (ωt%) - mass of iron-containing materials (kg) × zinc content of iron-containing materials (ωt%)} ÷ {mass of mixture (kg) × zinc content of mixture (ωt%)} × 100%;

[0074] The preset zinc content can be set according to the actual user requirements, for example, 0.5%. If the composition of the iron-containing material is normal, production is carried out according to normal operating instructions; if abnormal, the operating parameters are adjusted and production is carried out according to the new operating instructions.

[0075] In some embodiments, the parameter controller may use the following formula to determine whether the kiln temperature is abnormal:

[0076]

[0077] Among them, x i is the temperature measurement value of the target kiln body temperature measuring device, is the average value of n (such as 30, 35, etc.) temperature measurement values ​​of the target kiln body temperature measurement device, and both i and n are positive integers.

[0078] Specifically, when When , the parameter controller can determine that the kiln body temperature corresponding to the target kiln body temperature measuring device is abnormal.

[0079] Alternatively, for rotary kiln production systems equipped with temperature compensation equipment, the kiln temperature analysis device can generate kiln temperature information based on the temperature compensation information received from the temperature compensation equipment and the temperature measurements of multiple kiln temperature measurement devices. This kiln temperature information can then be sent to the parameter controller. This can further improve the accuracy of the kiln temperature information.

[0080] In some embodiments, the kiln body temperature analysis device may have the function of displaying or retrieving temperature data in time series to facilitate data backtracking by technicians.

[0081] In some embodiments, the parameter controller can determine whether the gas temperature is abnormal based on the fluctuation rate of the gas temperature at the kiln tail.

[0082] Specifically, the parameter controller may calculate the fluctuation rate of the gas temperature at the kiln tail according to the gas temperature information; if the fluctuation rate of the gas temperature is greater than a second preset fluctuation rate, the gas temperature is determined to be abnormal.

[0083] In some embodiments, the parameter controller can determine whether the gas composition at the kiln tail is abnormal based on the fluctuation rate of the gas composition.

[0084] Specifically, the parameter controller can calculate the fluctuation rate of the target gas composition at the kiln tail based on the gas composition information, where the target gas component can be one or more of carbon monoxide, carbon dioxide, or oxygen. If the fluctuation rate of the target gas component is greater than a third preset fluctuation rate, the gas composition is determined to be abnormal. For example, if the third preset fluctuation rate is 10% and the target gas component is carbon monoxide, if the calculated fluctuation rate of carbon monoxide exceeds 10%, the gas composition can be determined to be abnormal.

[0085] The following describes another production method for a rotary kiln production system provided by an embodiment of the present invention. This production method differs from the aforementioned production method in that abnormalities are determined independently by various analysis devices, such as the kiln head iron-containing material composition analysis device. When an abnormality is detected, the corresponding analysis device transmits specific abnormality detection information to the parameter controller.

[0086] Specifically, when the iron-containing material composition analysis device at the kiln head detects that the composition of the iron-containing material is abnormal, the detection information that the composition of the iron-containing material is abnormal is sent to the parameter controller; and the parameter controller adjusts the production control parameters based on the detection information that the composition of the iron-containing material is abnormal. When the kiln body temperature analysis device detects that the kiln body temperature is abnormal, the detection information that the kiln body temperature is abnormal is sent to the parameter controller; and the parameter controller adjusts the production control parameters based on the detection information that the kiln body temperature is abnormal. When the gas temperature analysis device detects that the gas temperature is abnormal, the detection information that the gas temperature is abnormal is sent to the parameter controller; and the parameter controller adjusts the production control parameters based on the detection information that the gas temperature is abnormal. When the gas composition analysis device detects that the gas composition is abnormal, the detection information that the gas composition is abnormal is sent to the parameter controller; and the parameter controller adjusts the production control parameters based on the detection information that the gas composition is abnormal.

[0087] It should be noted that the above-mentioned abnormality judgment and processing can refer to the above-mentioned abnormality judgment and processing of the parameter controller, which will not be repeated here.

[0088] In order to better understand the above rotary kiln production method, Figure 4 As shown, a rotary kiln production process flow chart is shown, which describes the production process under different abnormal situations.

[0089] In an embodiment of the present invention, a rotary kiln production system and a corresponding production method are provided. According to the changes in the temperature field of the rotary kiln body, the main components of the iron-containing materials at the kiln head, and the main components of the kiln tail gas, a kiln body temperature measuring device, a kiln body temperature analysis device, a kiln head iron-containing material composition analysis device, a kiln tail gas composition analysis device, and a kiln tail gas temperature analysis device are used to provide multi-factor measurement, analysis, and judgment functions, providing basic conditions for precise operation. In this way, through multi-factor analysis and judgment, the blast volume, carbon content, rotary kiln speed and other operating parameters are adjusted in a timely manner. Under the premise of ensuring that the dezincification rate meets the needs of the iron-containing material users, carbon consumption is reduced and low-carbon operation is achieved; at the same time, through precise batching, the iron-containing materials are fully consumed, ensuring that no secondary solid waste pollution is generated, and the goals of low consumption, low carbon emissions, and full reuse of iron-containing materials are achieved.

[0090] Compared with the existing rotary kiln production system, the rotary kiln production system provided by the embodiment of the present invention has higher system operation controllability, can change the current backward state of rotary kiln production that is overly dependent on manual experience operation, and greatly improves the automation level of rotary kiln production operation.

[0091] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0092] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A rotary kiln production method, characterized in that: The invention is applied to a rotary kiln production system, comprising a rotary kiln, a parameter controller, a kiln head iron-containing material composition analysis device arranged at a kiln head of the rotary kiln, a plurality of kiln body temperature measuring devices arranged at preset intervals from the kiln head in the kiln body of the rotary kiln, a kiln body temperature analysis device electrically connected to the kiln body temperature measuring device, a gas temperature analysis device and a gas composition analysis device arranged at a kiln tail of the rotary kiln; the kiln head iron-containing material composition analysis device, the kiln body temperature analysis device, the gas temperature analysis device and the gas composition analysis device are all electrically connected to the parameter controller; wherein the production control parameters of the parameter controller include carbon dosage, rotary kiln speed and blast volume; the method comprises: The kiln head iron-containing material composition analysis device sends the iron-containing material composition information to the parameter controller, the kiln body temperature analysis device sends the kiln body temperature information to the parameter controller, the gas temperature analysis device sends the gas temperature information to the parameter controller, and the gas composition analysis device sends the gas composition information to the parameter controller; The parameter controller adjusts the production control parameters according to the iron-containing material composition information, the kiln body temperature information, the gas temperature information, and the gas composition information.

2. The rotary kiln production method according to claim 1, characterized in that: The kiln temperature analysis device includes a temperature compensation device, which is electrically connected to a speed sensor for measuring the air flow speed in the kiln; The kiln body temperature analysis device sends the kiln body temperature information to the parameter controller, including: The temperature compensation device generates temperature compensation information based on speed information received from a speed sensor for measuring the speed of air flow in the kiln body; The kiln body temperature analysis device generates the kiln body temperature information based on the temperature compensation information and the temperature measurement values ​​of the plurality of kiln body temperature measurement devices, and sends the kiln body temperature information to the parameter controller.

3. The rotary kiln production method according to claim 1, characterized in that: The parameter controller adjusts the production control parameters according to the iron-containing material composition information, the kiln body temperature information, the gas temperature information, and the gas composition information, including: The parameter controller determines whether the composition of the iron-containing material is abnormal based on the iron-containing material composition information; if the composition of the iron-containing material is abnormal, the production control parameter is adjusted; The parameter controller determines whether the kiln body temperature is abnormal based on the kiln body temperature information; if the kiln body temperature is abnormal, the production control parameter is adjusted; The parameter controller determines whether the gas temperature is abnormal based on the gas temperature information; if the gas temperature is abnormal, the production control parameter is adjusted; The parameter controller determines whether the gas composition is abnormal based on the gas composition information; if the gas composition is abnormal, the production control parameter is adjusted.

4. The rotary kiln production method according to claim 3, characterized in that: The parameter controller determines whether the composition of the iron-containing material is abnormal based on the iron-containing material composition information, including: The parameter controller calculates the total iron content of the material in the kiln body according to the composition information of the iron-containing material; if the absolute value of the difference between the total iron content value and the preset total iron content value is greater than a preset threshold, it is determined that the composition of the iron-containing material is abnormal; Alternatively, the parameter controller calculates the fluctuation rate of the residual carbon content of the material in the kiln body according to the composition information of the iron-containing material; if the fluctuation rate of the residual carbon content is greater than a first preset fluctuation rate, it is determined that the composition of the iron-containing material is abnormal; Alternatively, the parameter controller calculates the zinc content of the material in the kiln body according to the composition information of the iron-containing material; if the zinc content is greater than a preset zinc content, it is determined that the composition of the iron-containing material is abnormal; Alternatively, the parameter controller calculates the dezincification rate of the material in the kiln body according to the composition information of the iron-containing material; if the dezincification rate is less than a preset dezincification rate, it is determined that the composition of the iron-containing material is abnormal.

5. The rotary kiln production method according to claim 3, characterized in that: The parameter controller determines whether the kiln body temperature is abnormal based on the kiln body temperature information, including: Use the following formula to determine whether the kiln temperature is abnormal: Among them, x i is the temperature measurement value of the target kiln body temperature measuring device, is the average value of n temperature measurement values ​​of the target kiln body temperature measurement device, where i and n are both positive integers; when When the target kiln body temperature measuring device detects an abnormal kiln body temperature, the kiln body temperature corresponding to the target kiln body temperature measuring device is determined to be abnormal.

6. The rotary kiln production method according to claim 3, characterized in that: The parameter controller determines whether the gas temperature is abnormal based on the gas temperature information, including: The parameter controller calculates the fluctuation rate of the gas temperature at the kiln tail according to the gas temperature information; if the fluctuation rate of the gas temperature is greater than a second preset fluctuation rate, the gas temperature is determined to be abnormal.

7. The rotary kiln production method according to claim 3, characterized in that: The parameter controller determines whether the gas composition is abnormal based on the gas composition information, including: The parameter controller calculates the fluctuation rate of the target gas composition at the kiln tail according to the gas composition information; if the fluctuation rate of the target gas composition is greater than a third preset fluctuation rate, the gas composition is judged to be abnormal; Wherein, the target gas components include carbon monoxide, carbon dioxide or oxygen.

8. A rotary kiln production method, characterized in that: The invention is applied to a rotary kiln production system, comprising a rotary kiln, a parameter controller, a kiln head iron-containing material composition analysis device arranged at a kiln head of the rotary kiln, a plurality of kiln body temperature measuring devices arranged at preset intervals from the kiln head in the kiln body of the rotary kiln, a kiln body temperature analysis device electrically connected to the kiln body temperature measuring device, a gas temperature analysis device and a gas composition analysis device arranged at a kiln tail of the rotary kiln; the kiln head iron-containing material composition analysis device, the kiln body temperature analysis device, the gas temperature analysis device and the gas composition analysis device are all electrically connected to the parameter controller; wherein the production control parameters of the parameter controller include carbon dosage, rotary kiln speed and blast volume; the method comprises: When the kiln head iron-containing material component analysis device detects that the composition of the iron-containing material is abnormal, the detection information that the composition of the iron-containing material is abnormal is sent to the parameter controller; the parameter controller adjusts the production control parameter according to the detection information that the composition of the iron-containing material is abnormal; When the kiln body temperature analysis device detects that the kiln body temperature is abnormal, the detection information that the kiln body temperature is abnormal is sent to the parameter controller; the parameter controller adjusts the production control parameter according to the detection information that the kiln body temperature is abnormal; When the gas temperature analysis device detects that the gas temperature is abnormal, the detection information that the gas temperature is abnormal is sent to the parameter controller; the parameter controller adjusts the production control parameter according to the detection information that the gas temperature is abnormal; When the gas composition analysis device detects that the gas composition is abnormal, the detection information that the gas composition is abnormal is sent to the parameter controller; the parameter controller adjusts the production control parameter according to the detection information that the gas composition is abnormal.

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