Method for producing metallurgical lime by using highly pulverized limestone

Abstract

The invention discloses a method for producing metallurgical lime by using highly-pulverized limestone, and relates to the field of limestone calcination, and the method comprises the following specific steps: step 1, screening and drying limestone; step 2, preheating: the highly-pulverized limestone in the rotary kiln enters a preheating chamber of a preheater through a feeding channel for preheating, and the preheating chamber preheats the highly-pulverized limestone to 900 + / -50 DEG C; 3, the preheated high-pulverization limestone enters a rotary kiln to be calcined; 4, the highly-pulverized limestone enters a vertical cooler to be cooled after being calcined, temperature sensors are installed at the air inlet and the air outlet, meanwhile, the temperature sensors are additionally arranged in the preheating chamber, and data detected by the temperature sensors are transmitted to a database of a preheating chamber controller; and the oxygen inlet and outlet effect and the disturbance influence in the preheating process can be considered, so that accurate control over preheating of the highly-pulverized limestone in the preheating chamber is improved.

Description

Technical Field

[0001] The invention relates to the field of limestone calcination, and in particular to a method for producing metallurgical lime by using highly pulverized limestone. Background Art

[0002] The high-temperature calcination of limestone requires specific temperatures. Limestone's melting point is 1140°C; temperatures above this point cause it to melt or gelatinize. During the calcination process, the limestone is converted into calcium oxide, also known as quicklime. This material has a wide range of applications in building materials, road maintenance, and other fields, offering high added value and market competitiveness.

[0003] According to CN116375364A - A method for producing metallurgical lime using highly pulverized limestone, it is described as follows: "Step 1: highly pulverized limestone with a particle size of 20-40 mm is screened by a feeding vibrating screen and then enters the high-level hopper of the rotary kiln for mixing; Step 2: the highly pulverized limestone in the high-level hopper of the rotary kiln enters the preheating chamber of the vertical preheater through an auxiliary discharge pipe, and is preheated to 900±50°C in the preheating chamber of the vertical preheater; Step 3: the preheated highly pulverized limestone enters the rotary kiln through a transfer chute for calcination; the rotary kiln uses coke oven gas, the temperature is controlled at 1050±50°C, and the pressure is 13-17kP a. The rotary kiln speed is controlled at 0.8-1.2 r / min; Step 4: After the highly pulverized limestone is calcined into metallurgical lime in the rotary kiln, it enters the vertical cooler for cooling. After multi-point cooling in the vertical cooler, the ash temperature drops below 130°C and is discharged through a vibrating ash discharger, completing the calcination. From this, we can see that the entire limestone calcination process does not have a series of intelligent control processes. In particular, during the preheating process, a series of operations such as loading, pushing, and air intake will affect the preheating effect of the limestone. Without reliable control, not only will preheating be insufficient, but it will also cause serious energy waste.

[0004] In summary, a method for producing metallurgical lime using highly pulverized limestone is designed. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention provides a method for producing metallurgical lime using highly pulverized limestone.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A method for producing metallurgical lime using highly pulverized limestone comprises the following specific steps:

[0008] Step 1: Limestone screening and drying: First, the limestone is screened and the highly pulverized limestone is vibrated and screened through a vibrating screen. Then, it is dried at low temperature and then put into a rotary kiln.

[0009] Step 2: Preheating: The highly pulverized limestone in the rotary kiln is fed into the preheating chamber of the preheater through the feed channel for preheating. The preheating chamber preheats the highly pulverized limestone to 900±50℃.

[0010] Step 3: The preheated high-powdered limestone enters the rotary kiln for calcination;

[0011] Step 4: After calcining, the highly pulverized limestone enters the vertical cooler for cooling;

[0012] The specific steps of step 2 are as follows:

[0013] S21. Preheat the preheating chamber and control the temperature at 900±50℃;

[0014] S22, inject high-powdered limestone through the feed channel, and the density of high-powdered limestone in the preheating chamber is controlled at 1.5 tons / m 3 ;

[0015] S23, start preheating the highly pulverized limestone, and introduce oxygen to ensure sufficient combustion and heating in the preheating chamber;

[0016] S24, pushing the push plate through the pushing channel to push out the highly pulverized limestone that has obtained the comprehensive preheating set value;

[0017] S25. A controller is provided on one side of the preheating chamber. The controller controls the feeding and discharging of materials, and controls the inflow and outflow of oxygen, so that the highly pulverized limestone quickly reaches the comprehensive preheating set value, thereby efficiently preheating the highly pulverized limestone in the preheating chamber.

[0018] Preferably, in step S24, the highly pulverized limestone is pushed out by a pushing plate.

[0019] Preferably, the specific calculation formula of the comprehensive preheating setting value is as follows:

[0020]

[0021] Among them, YrZ represents the comprehensive preheating setting value, WdZ represents the high-temperature heating preheating setting value, FxZ represents the stacking gap preheating setting value, μ1, μ2, μ3, and μ4 represent the high-temperature heating adjustment coefficient, stacking gap adjustment coefficient, collaborative adjustment coefficient, and preheating coupling adjustment coefficient, respectively, and Ψ represents the smoothing coefficient.

[0022] Preferably, the specific calculation formula of the high temperature heating preheating setting value is as follows:

[0023]

[0024] Among them, WdZ represents the high-temperature heating preheating set value, CqZ represents the oxygen outlet preheating set value, JqZ represents the oxygen inlet preheating set value, TlZ represents the pusher preheating set value, JlZ represents the feed preheating set value, δ1 and δ2 represent the oxygen inlet and outlet influence coefficient and the pile inlet and outlet influence coefficient respectively, and β represents the regulation factor of oxygen in the preheating chamber.

[0025] Preferably, the oxygen outlet preheating set value, the oxygen inlet preheating set value, the pusher preheating set value and the feed preheating set value, the oxygen inlet and outlet influence coefficient, and the stacking material inlet and outlet influence coefficient are obtained as follows:

[0026] Temperature sensors are installed at both the air inlet and the exhaust port, and a temperature sensor is also installed in the preheating chamber. The data detected by the temperature sensors are transmitted to the database of the preheating chamber controller. The temperature sensor measurement data at the air inlet is comprehensively analyzed to obtain the oxygen inlet preheating set value. The temperature sensor measurement data at the exhaust port is comprehensively analyzed to obtain the oxygen outlet preheating set value. The temperature sensor measurement data added to the preheating chamber is comprehensively analyzed to obtain the oxygen inlet and outlet influence coefficient.

[0027] Flow sensors are installed at the feeding channel and the pushing channel, and a pressure sensor is installed in the preheating chamber. The data detected by the flow sensor and the pressure sensor are transmitted to the database of the preheating chamber controller. The flow sensor measurement data of the unloading channel is comprehensively analyzed to obtain the feeding preheating set value, the flow sensor measurement data of the pushing channel is comprehensively analyzed to obtain the pushing preheating set value, and the pressure sensor measurement data is comprehensively analyzed to obtain the pile material inlet and outlet influence coefficient.

[0028] Preferably, the specific calculation formula of the stacking gap preheating setting value is as follows:

[0029]

[0030] Among them, FxZ represents the stacking gap preheating setting value, JfZ represents the feeding gap preheating setting value, TfZ represents the pushing gap preheating setting value, λ1, λ2, λ3 represent the feeding gap adjustment coefficient, pushing gap adjustment coefficient and superposition adjustment coefficient respectively, α1, α2 represent the feeding gap preheating effect coefficient, pushing gap preheating effect coefficient respectively.

[0031] Preferably, the steps for obtaining the feed gap preheating setting value, the push gap preheating setting value, the feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient, as well as the feed gap preheating effect coefficient and the push gap preheating effect coefficient are as follows:

[0032] Pressure sensors are installed at both the feed channel and the push channel. The feed channel feeds in small amounts and multiple times, and the push channel discharges the material according to a fixed number of times. Pressure sensors are provided in the upper, middle and lower halves of the high-pulverized limestone in the preheating chamber. The data of each pressure sensor is transmitted to the database of the preheating chamber controller. The feed gap preheating set value is obtained through a comprehensive analysis of the pressure sensor values ​​of the feed channel. The push gap preheating set value is obtained through a comprehensive analysis of the pressure sensor values ​​of the push channel. The feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient are obtained through a comprehensive analysis of the pressure sensor values ​​of the high-pulverized limestone in the preheating chamber. The feed gap preheating effect coefficient and the push gap preheating effect coefficient are obtained according to a comprehensive analysis of the feed speed of the feed channel and the pushing speed of the push channel.

[0033] Preferably, in step 4, the highly pulverized limestone is cooled to 130° C. in a vertical cooler and then discharged.

[0034] The beneficial effects of the present invention are as follows: in the method for producing metallurgical lime using highly pulverized limestone:

[0035] 1. Temperature sensors are installed at both the air inlet and the exhaust port, and a temperature sensor is also installed in the preheating chamber. The data detected by the temperature sensors are transmitted to the database of the preheating chamber controller. The measurement data of the temperature sensor at the air inlet are comprehensively analyzed to obtain the oxygen inlet preheating set value. The measurement data of the temperature sensor at the exhaust port are comprehensively analyzed to obtain the oxygen outlet preheating set value. The measurement data of the temperature sensor added in the preheating chamber are comprehensively analyzed to obtain the oxygen inlet and outlet influence coefficient. By quantitatively calculating the high-temperature heating preheating set value, the effect of oxygen inlet and outlet and the influence of disturbance during the preheating process can be taken into account, thereby improving the precise control of the preheating of highly pulverized limestone in the preheating chamber.

[0036] 2. Pressure sensors are installed at both the feed channel and the push channel. The feed channel feeds the material in small amounts and multiple times, and the push channel discharges the material at a fixed number of times. Pressure sensors are installed in the upper, middle and lower areas of the preheating chamber, and the data of each pressure sensor is transmitted to the database of the preheating chamber controller. The feed gap preheating setting value is obtained through comprehensive analysis of the pressure sensor values ​​of the feed channel, and the push gap preheating setting value is obtained through comprehensive analysis of the pressure sensor values ​​of the push channel. Pressure sensors are installed in the upper, middle and lower areas of the preheating chamber for high-pulverized limestone, and a comprehensive numerical analysis is performed to obtain the feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient. Based on the comprehensive analysis of the feed speed of the feed channel and the pushing speed of the push channel, the feed gap preheating effect coefficient and the push gap preheating effect coefficient are obtained. This allows for consideration of the disturbance inside the preheating chamber caused by feeding and pushing in the preheating chamber, thereby improving the precise control of the preheating of the high-pulverized limestone in the preheating chamber and improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0038] Figure 1 It is a diagram of the method steps of the present invention. DETAILED DESCRIPTION

[0039] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0040] like Figure 1 As shown, a method for producing metallurgical lime using highly pulverized limestone comprises the following specific steps:

[0041] Step 1: Limestone screening and drying: First, the limestone is screened and the highly pulverized limestone is vibrated and screened through a vibrating screen. Then, it is dried at low temperature and then put into a rotary kiln.

[0042] Step 2: Preheating: The highly pulverized limestone in the rotary kiln is fed into the preheating chamber of the preheater through the feed channel for preheating. The preheating chamber preheats the highly pulverized limestone to 900±50℃.

[0043] Step 3: The preheated high-powdered limestone enters the rotary kiln for calcination;

[0044] Step 4: After calcining, the highly pulverized limestone enters the vertical cooler for cooling;

[0045] The specific steps of step 2 are as follows:

[0046] S21. Preheat the preheating chamber and control the temperature at 900±50℃;

[0047] S22, inject high-powdered limestone through the feed channel, and the density of high-powdered limestone in the preheating chamber is controlled at 1.5 tons / m 3 ;

[0048] S23, start preheating the highly pulverized limestone, and introduce oxygen to ensure sufficient combustion and heating in the preheating chamber;

[0049] S24, pushing the push plate through the pushing channel to push out the highly pulverized limestone that has obtained the comprehensive preheating set value;

[0050] S25. A controller is provided on one side of the preheating chamber. The controller controls the feeding and discharging of materials, and controls the inflow and outflow of oxygen, so that the highly pulverized limestone quickly reaches the comprehensive preheating set value, thereby efficiently preheating the highly pulverized limestone in the preheating chamber.

[0051] Specifically, in step S24, the highly pulverized limestone is pushed out by a pushing plate.

[0052] Specifically, the specific calculation formula of the comprehensive preheating setting value is as follows:

[0053]

[0054] Among them, YrZ represents the comprehensive preheating setting value, WdZ represents the high-temperature heating preheating setting value, FxZ represents the stacking gap preheating setting value, μ1, μ2, μ3, and μ4 represent the high-temperature heating adjustment coefficient, stacking gap adjustment coefficient, collaborative adjustment coefficient, and preheating coupling adjustment coefficient, respectively, and Ψ represents the smoothing coefficient.

[0055] According to long-term statistical calculations, the values ​​of μ1, μ2, μ3, and μ4 are 3.0, 2.0, 1.5, 0.01, and 7.0, respectively;

[0056] Then YrZ represents the comprehensive preheating setting value, WdZ represents the high temperature heating preheating setting value, and FxZ represents the stacking gap preheating setting value, as shown in Table 1 below:

[0057] Table 1. Examples of comprehensive preheating setting values ​​for highly pulverized limestone in the preheating chamber

[0058]

[0059] It can be seen from Table 1 that the increase of the high-temperature heating preheating setting value will increase the comprehensive preheating setting value, which means that after the efficiency of injecting oxygen is improved, the comprehensive preheating effect is increased; the increase of the pile gap preheating setting value will reduce the comprehensive preheating setting value, which means that the larger the pile gap is, the faster the preheating in the pile is, and the better the comprehensive preheating effect. By setting the threshold value of the comprehensive preheating setting value, the material can be pushed when the threshold is reached, and then the parameters in the synchronous preheating chamber will change, and then the preheating calculation will be re-entered. This can be repeated, which not only can achieve accurate preheating setting but also improve energy utilization.

[0060] Specifically, the specific calculation formula of the high temperature heating preheating setting value is as follows:

[0061]

[0062] Among them, WdZ represents the high-temperature heating preheating set value, CqZ represents the oxygen outlet preheating set value, JqZ represents the oxygen inlet preheating set value, TlZ represents the pusher preheating set value, JlZ represents the feed preheating set value, δ1 and δ2 represent the oxygen inlet and outlet influence coefficient and the pile inlet and outlet influence coefficient respectively, and β represents the regulation factor of oxygen in the preheating chamber.

[0063] According to long-term statistical calculations, the values ​​of δ1, δ2, and β are 1.0, 0.1, and 5.0, respectively.

[0064] WdZ represents the high temperature heating preheating setting value, CqZ represents the oxygen outlet preheating setting value, JqZ represents the oxygen inlet preheating setting value, TlZ represents the pusher preheating setting value, and JlZ represents the feed preheating setting value. The relationship is shown in Table 2:

[0065] Table 2. Examples of preheating setting values ​​for high-powdered limestone in a preheating chamber at high temperatures

[0066] Case 5 Case 6 Case 7 Case 8 Oxygen outlet preheating setting value CqZ 560.7 560.7 560.7 650.8 Oxygen intake preheating setting value JqZ 45.16 45.16 99.48 103.46 Pusher preheating setting value TlZ 53.18 42.39 61.82 61.82 Feed preheating setting value JlZ 19.25 17.40 22.65 22.65 High temperature heating preheating setting value WdZ 156.28 83.30 128.60 132.52

[0067] According to Case 5 and Case 6, when feeding, the high-temperature heating preheating set value is reduced, that is, the entry of highly pulverized limestone will reduce the temperature of the preheating chamber. When pushing, the high-temperature heating preheating set value is increased, and the highly pulverized limestone is pushed out, so that the internal oxygen burns fully and the internal preheating effect is improved. Therefore, a small amount of multiple feeding method is adopted, and a single quantitative method is used to push the material.

[0068] According to Case 7 and Case 8, the temperature and speed of the injected oxygen increase, the oxygen intake preheating set value is increased, and the high-temperature heating preheating set value is increased, that is, the injection of oxygen can improve the combustion inside the preheating chamber and improve the preheating effect, but the gain is not large; the temperature of the exhausted oxygen increases and the exhaust speed decreases, which increases the oxygen outlet preheating set value and increases the high-temperature heating preheating set value, that is, the high temperature and slow exhaust speed of the exhausted oxygen can make the oxygen inside the preheating chamber fully burn, thereby improving the preheating effect. The gain effect is slightly more obvious than the gain effect of the oxygen intake preheating set value.

[0069] Specifically, the steps for obtaining the oxygen outlet preheating set value, the oxygen inlet preheating set value, the pusher preheating set value, the feed preheating set value, the oxygen inlet and outlet influence coefficient, and the stacking inlet and outlet influence coefficient are as follows:

[0070] Temperature sensors are installed at both the air inlet and the exhaust port, and a temperature sensor is also installed in the preheating chamber. The data detected by the temperature sensors are transmitted to the database of the preheating chamber controller. The temperature sensor measurement data at the air inlet is comprehensively analyzed to obtain the oxygen inlet preheating set value. The temperature sensor measurement data at the exhaust port is comprehensively analyzed to obtain the oxygen outlet preheating set value. The temperature sensor measurement data added to the preheating chamber is comprehensively analyzed to obtain the oxygen inlet and outlet influence coefficient.

[0071] Flow sensors are installed at the feeding channel and the pushing channel, and a pressure sensor is installed in the preheating chamber. The data detected by the flow sensor and the pressure sensor are transmitted to the database of the preheating chamber controller. The flow sensor measurement data of the unloading channel is comprehensively analyzed to obtain the feeding preheating set value, the flow sensor measurement data of the pushing channel is comprehensively analyzed to obtain the pushing preheating set value, and the pressure sensor measurement data is comprehensively analyzed to obtain the pile material inlet and outlet influence coefficient.

[0072] Specifically, the specific calculation formula of the stacking gap preheating setting value is as follows:

[0073]

[0074] Among them, FxZ represents the stacking gap preheating setting value, JfZ represents the feeding gap preheating setting value, TfZ represents the pushing gap preheating setting value, λ1, λ2, λ3 represent the feeding gap adjustment coefficient, pushing gap adjustment coefficient and superposition adjustment coefficient respectively, α1, α2 represent the feeding gap preheating effect coefficient, pushing gap preheating effect coefficient respectively.

[0075] According to long-term statistical calculations, the values ​​of λ1, λ2, λ3, α1, and α2 are 0.46, 0.12, 0.52, 0.14, and 0.11, respectively.

[0076] FxZ represents the preheating setting value of the stacking gap, JfZ represents the preheating setting value of the feeding gap, and TfZ represents the preheating setting value of the pushing gap, as shown in Table 3:

[0077] Table 3. Example of setting values ​​for preheating gaps in the preheating chamber for high-pulverized limestone

[0078]

[0079] From the cases in Table 3, it can be seen that the stack gap value will be affected during feeding, resulting in an increase in the stack gap preheating setting value; the stack gap preheating setting value will be reduced during discharging, indicating that the internal combustion will be fully achieved during discharging.

[0080] Specifically, the steps for obtaining the feed gap preheating setting value, the push gap preheating setting value, the feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient, as well as the feed gap preheating effect coefficient and the push gap preheating effect coefficient are as follows:

[0081] Pressure sensors are installed at both the feed channel and the push channel. The feed channel feeds in small amounts and multiple times, and the push channel discharges the material according to a fixed number of times. Pressure sensors are provided in the upper, middle and lower halves of the high-pulverized limestone in the preheating chamber. The data of each pressure sensor is transmitted to the database of the preheating chamber controller. The feed gap preheating set value is obtained through a comprehensive analysis of the pressure sensor values ​​of the feed channel. The push gap preheating set value is obtained through a comprehensive analysis of the pressure sensor values ​​of the push channel. The feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient are obtained through a comprehensive analysis of the pressure sensor values ​​of the high-pulverized limestone in the preheating chamber. The feed gap preheating effect coefficient and the push gap preheating effect coefficient are obtained according to a comprehensive analysis of the feed speed of the feed channel and the pushing speed of the push channel.

[0082] Specifically, in step 4, the highly pulverized limestone is cooled to 130° C. in a vertical cooler and then discharged.

[0083] The above description is for inspiration. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical concept of this invention. The technical scope of this invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for producing metallurgical lime using highly pulverized limestone, characterized in that: The specific steps include: Step 1: Limestone screening and drying: First, the limestone is screened and the highly pulverized limestone is vibrated and screened through a vibrating screen. Then, it is dried at low temperature and then put into a rotary kiln. Step 2: Preheating: The highly pulverized limestone in the rotary kiln is fed into the preheating chamber of the preheater through the feed channel for preheating. The preheating chamber preheats the highly pulverized limestone to 900±50℃. Step 3: The preheated high-powdered limestone enters the rotary kiln for calcination; Step 4: After calcining, the highly pulverized limestone enters the vertical cooler for cooling; The specific steps of step 2 are as follows: S21. Preheat the preheating chamber and control the temperature at 900±50℃; S22, inject high-powdered limestone through the feed channel, and the density of high-powdered limestone in the preheating chamber is controlled at 1.5 tons / m 3 ; S23, start preheating the highly pulverized limestone, and introduce oxygen to ensure sufficient combustion and heating in the preheating chamber; S24, pushing the push plate through the pushing channel to push out the highly pulverized limestone that has obtained the comprehensive preheating set value; S25. A controller is provided on one side of the preheating chamber. The controller controls the feeding and discharging of materials, and controls the inflow and outflow of oxygen, so that the highly pulverized limestone quickly reaches the comprehensive preheating set value, thereby efficiently preheating the highly pulverized limestone in the preheating chamber.

2. A method for producing metallurgical lime using highly pulverized limestone according to claim 1, characterized in that: The specific calculation formula of the comprehensive preheating setting value is as follows: Among them, YrZ represents the comprehensive preheating setting value, WdZ represents the high-temperature heating preheating setting value, FxZ represents the stacking gap preheating setting value, μ1, μ2, μ3, and μ4 represent the high-temperature heating adjustment coefficient, stacking gap adjustment coefficient, collaborative adjustment coefficient, and preheating coupling adjustment coefficient, respectively, and Ψ represents the smoothing coefficient.

3. A method for producing metallurgical lime using highly pulverized limestone according to claim 2, characterized in that: The specific calculation formula of the high temperature heating preheating setting value is as follows: Among them, WdZ represents the high-temperature heating preheating set value, CqZ represents the oxygen outlet preheating set value, JqZ represents the oxygen inlet preheating set value, TlZ represents the pusher preheating set value, JlZ represents the feed preheating set value, δ1 and δ2 represent the oxygen inlet and outlet influence coefficient and the pile inlet and outlet influence coefficient respectively, and β represents the regulation factor of oxygen in the preheating chamber.

4. A method for producing metallurgical lime using highly pulverized limestone according to claim 3, characterized in that: The steps for obtaining the oxygen outlet preheating set value, oxygen inlet preheating set value, pusher preheating set value, feed preheating set value, oxygen inlet and outlet influence coefficient, and pile inlet and outlet influence coefficient are as follows: Temperature sensors are installed at both the air inlet and the exhaust port, and a temperature sensor is also installed in the preheating chamber. The data detected by the temperature sensors are transmitted to the database of the preheating chamber controller. The temperature sensor measurement data at the air inlet is comprehensively analyzed to obtain the oxygen inlet preheating set value. The temperature sensor measurement data at the exhaust port is comprehensively analyzed to obtain the oxygen outlet preheating set value. The temperature sensor measurement data added to the preheating chamber is comprehensively analyzed to obtain the oxygen inlet and outlet influence coefficient. Flow sensors are installed at the feeding channel and the pushing channel, and a pressure sensor is installed in the preheating chamber. The data detected by the flow sensor and the pressure sensor are transmitted to the database of the preheating chamber controller. The flow sensor measurement data of the unloading channel is comprehensively analyzed to obtain the feeding preheating set value, the flow sensor measurement data of the pushing channel is comprehensively analyzed to obtain the pushing preheating set value, and the pressure sensor measurement data is comprehensively analyzed to obtain the pile material inlet and outlet influence coefficient.

5. A method for producing metallurgical lime using highly pulverized limestone according to claim 2, characterized in that: The specific calculation formula of the stacking gap preheating setting value is as follows: Among them, FxZ represents the stacking gap preheating setting value, JfZ represents the feeding gap preheating setting value, TfZ represents the pushing gap preheating setting value, λ1, λ2, λ3 represent the feeding gap adjustment coefficient, pushing gap adjustment coefficient and superposition adjustment coefficient respectively, α1, α2 represent the feeding gap preheating effect coefficient, pushing gap preheating effect coefficient respectively.

6. A method for producing metallurgical lime using highly pulverized limestone according to claim 5, characterized in that: The steps for obtaining the feed gap preheating setting value, the push gap preheating setting value, the feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient, as well as the feed gap preheating effect coefficient and the push gap preheating effect coefficient are as follows: Pressure sensors are installed at both the feed channel and the push channel. The feed channel feeds in small amounts and multiple times, and the push channel discharges the material according to a fixed number of times. Pressure sensors are provided in the upper, middle and lower halves of the high-pulverized limestone in the preheating chamber. The data of each pressure sensor is transmitted to the database of the preheating chamber controller. The feed gap preheating set value is obtained through a comprehensive analysis of the pressure sensor values ​​of the feed channel. The push gap preheating set value is obtained through a comprehensive analysis of the pressure sensor values ​​of the push channel. The feed gap adjustment coefficient, the push gap adjustment coefficient and the superposition adjustment coefficient are obtained through a comprehensive analysis of the pressure sensor values ​​of the high-pulverized limestone in the preheating chamber. The feed gap preheating effect coefficient and the push gap preheating effect coefficient are obtained according to a comprehensive analysis of the feed speed of the feed channel and the pushing speed of the push channel.

7. The method for producing metallurgical lime using highly pulverized limestone according to claim 1, wherein: In the step 4, the highly pulverized limestone is cooled to 130° C. in a vertical cooler and then discharged.

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