阅读说明：本技术 一种烧结混料的方法 (Method for sintering mixed materials ) 是由 赵伟 史忠其 童毅 冯言 熊国川 杨招 岳洪琴 于 2021-08-06 设计创作，主要内容包括：本申请提供一种烧结混料的方法,应用于烧结混料系统,烧结混料系统包括烧结混合圆筒、鼠笼式电机和变频器,鼠笼式电机驱动连接烧结混合圆筒,变频器与鼠笼式电机电性连接用于变频驱动鼠笼式电机,烧结混料的方法包括：烧结混料系统包括启动模式和运行模式,烧结混料系统处于启动模式时,变频器的输出频率为X。烧结混料系统处于运行模式时,变频器的输出频率为Y,X与Y之比为5:3.5-4。烧结混料系统处于启动模式时,变频器的功率与鼠笼式电机的功率比值≥1.25。该烧结混料方法保证烧结混料系统正常运行的同时能降低系统故障的几率,并且能降低整个的系统能耗。(The application provides a method of sintering compounding is applied to sintering compounding system, and sintering compounding system includes sintering mixing drum, squirrel-cage motor and converter, and the sintering mixing drum is connected in the squirrel-cage motor drive, and converter and squirrel-cage motor electric connection are used for frequency conversion drive squirrel-cage motor, and the method of sintering compounding includes: the sintering and mixing system comprises a starting mode and an operating mode, and when the sintering and mixing system is in the starting mode, the output frequency of the frequency converter is X. When the sintering and mixing system is in an operation mode, the output frequency of the frequency converter is Y, and the ratio of X to Y is 5: 3.5-4. When the sintering and mixing system is in a starting mode, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is more than or equal to 1.25. The sintering and mixing method can reduce the probability of system failure while ensuring the normal operation of a sintering and mixing system, and can reduce the energy consumption of the whole system.)

1. The method for sintering and mixing materials is characterized by being applied to a sintering and mixing system, wherein the sintering and mixing system comprises a sintering and mixing cylinder, a squirrel-cage motor and a frequency converter, the squirrel-cage motor is in driving connection with the sintering and mixing cylinder, the frequency converter is electrically connected with the squirrel-cage motor and is used for driving the squirrel-cage motor in a frequency conversion mode, and the method for sintering and mixing materials comprises the following steps:

the sintering and mixing system comprises a starting mode and an operating mode; when the sintering and mixing system is in a starting mode, the output frequency of the frequency converter is X; when the sintering and mixing system is in an operation mode, the output frequency of the frequency converter is Y; the ratio of X to Y is 5: 3.5-4;

when the sintering and mixing system is in the starting mode, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is more than or equal to 1.25.

2. A method of sinter compounding as claimed in claim 1, wherein when the sinter compounding system is in the start-up mode, the output frequency of the frequency converter is set to 45HZ to 50 HZ; when the sintering and mixing system is in the operation mode, the output frequency of the frequency converter is set to be 35HZ-50 HZ.

3. A method of sintering compounding as claimed in claim 2 characterized in that the duration of the start-up mode is 50-100 s.

4. A method of sintering compounding as claimed in claim 3 characterized in that the duration of the start-up mode is 60 s.

5. A method of sinter compounding as claimed in claim 1, wherein the ratio of the power of the frequency converter to the power of the squirrel cage motor is 1.3-1.5:1 when the sinter compounding system is in the start mode.

6. A method of sintering compounding as claimed in any one of claims 1-5, characterized in that the method of sintering compounding further comprises:

the materials in the sintering mixing cylinder comprise iron materials, fuel and flux;

when the starting mode is switched to the running mode, the input current of the squirrel-cage motor is detected to be I₁；

Then continuously monitoring the input current of the squirrel-cage motor to be I₂；

When the said I₂≥1.3×I₁Judging the sintering mixAnd stopping the sintering and mixing system when the bonding material in the cylinder is serious, and cleaning the bonding material in the sintering and mixing cylinder.

7. A method of sintering compounding as claimed in claim 6 wherein when I is said₂≥1.5×I₁And stopping the sintering and mixing system, and cleaning the adhesive in the sintering and mixing cylinder.

Technical Field

The application relates to the technical field of metallurgy, in particular to a method for sintering mixed materials.

Background

Sintering is used as an important process in iron and steel smelting, and aims to prepare and sinter iron ore and some materials, such as lime and the like, into pellets so as to provide artificial rich ore with certain granularity and metallurgical performance for subsequent smelting. When sintering process is carried out, firstly material mixing is needed, the material mixing is realized by adopting a sintering material mixing system, the sintering material mixing system comprises a motor and a sintering mixing cylinder, sintered raw materials such as iron ore and materials are needed to be put into the sintering mixing cylinder, the motor drives the sintering mixing cylinder to operate, and the raw materials in the sintering mixing cylinder are fully mixed.

To improve compounding efficiency, current sinter mixing drums are typically large devices, which, in addition to the large amount of sinter feedstock present therein, require heavy start-up of the sinter mixing drum. The winding type motor has the characteristics of small starting current, easy control, large starting torque and the like, and is naturally widely applied to a sintering and mixing system.

However, in the mixing production process, the sintering mixing system often has electrical faults, and a large amount of time and energy are needed for equipment maintenance or replacement, so that the production efficiency and the cost loss are seriously influenced.

Disclosure of Invention

The inventor researches and discovers that when the sintering and mixing system operates, the sintering and mixing cylinder rotates, so that on-site dust flies, the dust is inevitably sucked into the wound-rotor motor, the rotor of the wound-rotor motor is formed by winding copper wires, the material clamping phenomenon is easy to occur on the rotor part of the motor, the failure of the wound-rotor motor is caused by the failure of the normal and flexible operation of the carbon brushes of the motor, and the failure of the whole sintering and mixing system is caused.

If the sintering and mixing system is cleaned frequently on site, the problem that dust flies and the probability of motor faults caused by material blockage of a wound-rotor motor rotor is reduced can be solved, but the machine needs to be stopped for processing, and manpower and material resources are consumed very much. Therefore, in order to reduce the probability of motor faults, the inventor replaces the motor, the wound-rotor motor is replaced by a squirrel-cage motor, and the squirrel-cage motor is formed by casting an aluminum bar or a copper bar and a short-circuit ring, so that the probability of material jamming of the rotor can be effectively reduced due to the structure of the squirrel-cage motor, and the probability of motor faults is reduced.

However, in the case of the squirrel cage motor, power needs to be increased to perform heavy-duty starting of the sintered mixing cylinder, which leads to increased energy consumption and increased cost, as compared with the wire motor. The inventor further researches and discovers that after the sintering mixing cylinder is normally started and the sintering mixing system normally operates, the input frequency of the squirrel-cage motor is properly reduced, so that the normal operation of the whole system can be ensured, and the energy consumption of the system can be reduced.

Based on this, the application aims to provide a sintering and material mixing method, which is applied to a sintering and material mixing system, so that the normal operation of the sintering and material mixing system is ensured, the probability of system failure is reduced, and the energy consumption of the system is reduced.

In order to achieve the purpose, the following technical means are adopted in the application:

the application provides a method of sintering compounding is applied to sintering compounding system, and sintering compounding system includes sintering mixing drum, squirrel-cage motor and converter, and the sintering mixing drum is connected in the squirrel-cage motor drive, and converter and squirrel-cage motor electric connection are used for frequency conversion drive squirrel-cage motor, and the method of sintering compounding includes:

the sintering and mixing system comprises a starting mode and an operating mode, when the sintering and mixing system is in the starting mode, the output frequency of the frequency converter is X, when the sintering and mixing system is in the operating mode, the output frequency of the frequency converter is Y, and the ratio of X to Y is 5: 3.5-4.

When the sintering and mixing system is in a starting mode, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is more than or equal to 1.25.

In the sintering and mixing system, in the starting mode, the power of the frequency converter is not less than 1.25 times of that of the squirrel-cage motor, so that the frequency converter can drive the squirrel-cage motor and the squirrel-cage motor can drive the sintering and mixing cylinder in driving connection with the squirrel-cage motor, and the whole sintering and mixing system can be started. After the sintering and mixing system is started, the system enters an operation mode, at the moment, the output power of the frequency converter is properly reduced, and the ratio of the output frequency of the frequency converter in the starting mode to the output frequency in the operation mode is 5:3.5-4, so that the sintering and mixing system can still normally operate.

The squirrel-cage motor is adopted to replace a winding motor, and due to the structure of the squirrel-cage motor, dust is not easy to adhere to a motor rotor when a sintering and mixing system operates, so that the probability of motor faults is greatly reduced. When the squirrel-cage motor is in a starting mode, the frequency converter enables the starting torque of the squirrel-cage motor to be gentle, the starting impact problem of equipment connected behind the squirrel-cage motor is reduced, and the service life of the equipment is prolonged. And the power of the frequency converter is not less than 1.25 times of the power of the squirrel-cage motor, and the whole system can be started normally. Meanwhile, the frequency converter is adopted to change the output frequency of the sintering and mixing system in a starting mode and an operating mode, so that the ratio of the output frequency in the operating mode to the output frequency in the starting mode is 5:3.5-4, the normal operation of the system is ensured, and the effect of reducing energy consumption can be achieved. Meanwhile, the frequency converter reduces the output frequency in the operation mode, the rotation frequency transmitted to the sintering and mixing cylinder is correspondingly reduced, the rotation speed is reduced, and the raw materials in the sintering and mixing cylinder are mixed more uniformly.

Further, when the sintering and mixing system is in a starting mode, the output frequency of the frequency converter is set to be 45HZ-50 HZ. And when the sintering and mixing system is in the operation mode, the output frequency of the frequency converter is set to be 35HZ-40 HZ.

The frequency converter changes the output frequency of the sintering and mixing system in a starting mode and an operating mode, when the sintering and mixing system is in the starting mode, the output frequency of the frequency converter is adjusted to be 45HZ-50HZ, the input frequency of the squirrel-cage motor is also 45HZ-50HZ and is consistent with the frequency of power supply of a power grid, the power of the squirrel-cage motor is high, so that the starting torque of the squirrel-cage motor correspondingly reaches a high value, and the sintering and mixing cylinder is easy to start. And after the sintering and mixing system enters an operation mode, the output frequency of the frequency converter is adjusted to be 35HZ-40HZ, the input frequency of the squirrel-cage motor is correspondingly reduced to 35HZ-40HZ, and the output frequency in the operation mode is smaller than that in the starting mode, so that the normal operation of the system is ensured, and the energy consumption of the system is reduced. Meanwhile, the rotation frequency transmitted to the sintering mixing cylinder is correspondingly reduced, the rotation speed is reduced, and the raw materials in the sintering mixing cylinder are mixed more uniformly.

Further, the duration of the start-up mode is 50s-100 s. In the time period, the sintering and mixing system enters a stable operation mode from the start, and the rotating speed of the sintering and mixing cylinder is stable.

Further, the duration of the start-up mode is 60 s. The sintering and mixing system can be enabled to enter an operation mode as soon as possible from the starting, the system enters a stable state, the output frequency of the frequency converter is reduced, and the energy consumption of the system is further reduced.

Further, when the sintering and mixing system is in a starting mode, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is 1.3-1.5: 1. The power of the frequency converter and the power of the squirrel-cage motor are set in such a way, so that the whole system can be normally started, the economic benefit can be considered, the frequency converter with the power far higher than that of the squirrel-cage motor does not need to be purchased for matching, and the cost is saved.

Further, the method for sintering the mixed material also comprises the following steps: the materials in the sintering mixing cylinder comprise iron materials, fuel and flux. When the starting mode is switched to the running mode, the input current of the squirrel-cage motor is detected to be I₁. Then continuously monitoring the input current of the squirrel-cage motor to be I₂. When I is₂≥1.3×I₁And (4) judging that the bonding material in the sintering mixing cylinder is serious, stopping the sintering mixing system, and cleaning the bonding material in the sintering mixing cylinder.

When the sintering and mixing system is switched from a starting mode to an operating mode, the input current I of the squirrel-cage motor₁Will be within a certain range, but the inventors found thatWhen the system is in an operation mode, the raw materials are continuously adhered to the inner wall of the sintering and mixing cylinder in the material mixing process, and the input current I of the squirrel-cage motor is increased along with the increase of the adhered raw materials₂The whole is in an ascending trend, and the two are positively correlated. When I is₂≥1.3×I₁And the situation of the materials sticking on the inner wall of the sintering mixing cylinder is serious, and personnel needs to stop to clean the materials sticking in the sintering mixing cylinder. Using input current I when cage motor is in running mode₂Measuring and switching to the input current I in the operating mode₁Carry out the comparison, judge the sizing condition of sintering mixing drum, can be quick accurate learn the sizing condition, in time clear away the sizing, avoided because the clearance untimely, the raw materials of adhesion concreties on the section of thick bamboo wall, both brought the difficulty for the clearance, the raw materials of concretion probably still can drop at clearance in-process bold, brings the potential safety hazard for the clearance personnel.

Further, I₂≥1.5×I₁And stopping the sintering and mixing system, and cleaning the adhesive in the sintering and mixing cylinder. Set as I₂≥1.5×I₁The sticky materials in the sintering mixing cylinder are cleaned, so that the cleaning period of the sticky materials is reasonable, the phenomenon that normal production is seriously influenced due to frequent shutdown is avoided, and the problem that the cleaning difficulty is increased due to excessive sticky materials caused by overlong cleaning period can also be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive efforts and also belong to the protection scope of the present application.

FIG. 1 is a circuit diagram of a sinter mixing system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the binder on the inner wall of the sintered mixing cylinder in the embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

When the sintering and mixing system is in operation, the sintering and mixing cylinder rotates, so that dust on site flies, the dust can be absorbed into the wound-rotor motor inevitably, the rotor of the wound-rotor motor is wound by copper wires, the phenomenon of material blocking of the rotor part of the motor is caused easily, the failure of the wound-rotor motor is caused by the failure of the normal and flexible operation of the carbon brush of the motor, and the failure of the normal operation of the whole sintering and mixing system is caused.

If the sintering and mixing system is cleaned frequently on site, the problem that dust flies and the probability of motor faults caused by material blockage of a wound-rotor motor rotor is reduced can be solved, but the motor needs to be stopped frequently for cleaning, and manpower and material resources are consumed very much. Therefore, in order to reduce the probability of motor faults, the wound-rotor motor is replaced by a squirrel-cage motor, and the squirrel-cage motor is formed by casting an aluminum bar or a copper bar and a short-circuit ring, so that the probability of material blockage of the rotor can be effectively reduced due to the structure of the squirrel-cage motor, and the probability of motor faults is reduced.

However, in the case of the squirrel cage motor, power needs to be increased to perform heavy-duty starting of the sintered mixing cylinder, which leads to increased energy consumption and increased cost, as compared with the wire motor. The inventor further researches and discovers that after the sintering and mixing cylinder is normally started and the sintering and mixing system normally operates, the input frequency of the squirrel-cage motor is properly reduced, so that the normal operation of the whole system can be ensured, the energy consumption can also be reduced, the energy consumption of the whole system is lower than that of a wound-rotor motor, and the specific energy consumption analysis will be described in detail in the following content.

FIG. 1 is a circuit diagram of a sinter mixing system according to an embodiment of the present application. Referring to fig. 1, an embodiment of the present application provides a method for sintering and mixing materials, which is applied to a sintering and mixing system, where the sintering and mixing system includes a sintering and mixing cylinder, a squirrel-cage motor and a frequency converter, the squirrel-cage motor is connected to the sintering and mixing cylinder in a driving manner, and the frequency converter is electrically connected to the squirrel-cage motor and used for driving the squirrel-cage motor in a frequency conversion manner.

The sintering material generally comprises iron-containing materials, fuel and fusing agent, wherein generally, the iron materials are selected from at least one of blending ore, fly ash and return mine, the fuel is selected from at least one of coke powder and anthracite, and the fusing agent is selected from at least one of dolomite powder, limestone powder and quicklime powder.

Before starting the system, raw materials are added into the sintering mixing cylinder from the inlet of the cylinder according to a certain proportion, and after the raw materials are added, the inlet of the sintering mixing cylinder is closed.

Next, the sintering and mixing system needs to be started and stably operated, and the method for sintering and mixing comprises the following steps:

the modes of the sinter mixing system also include a start-up mode and an operating mode to mix the raw materials in the sinter mixing cylinder. With reference to fig. 1, QF1 is a 10kV user circuit breaker, QF2 and QF3 are circuit breakers matching with a frequency converter, PT is a voltage transformer, QF1, QF2 and QF3 are closed in sequence, so that the sintering and mixing system is in a start mode, at this time, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is required to be not less than 1.25, the frequency converter drives the squirrel-cage motor, the squirrel-cage motor drives the sintering and mixing cylinder in driving connection with the squirrel-cage motor, the whole sintering and mixing system is normally started, and the output frequency of the frequency converter is adjusted to be X, wherein X is 45HZ to 50 HZ.

In the embodiment, the radius of the sintering mixing cylinder is 2.2 meters, the length of the sintering mixing cylinder is 20 meters, the rated power of the selected frequency converter is 1260kW, the rated power of the squirrel-cage motor is 900kW, when the sintering mixing system is in a starting mode, the output frequency of the frequency converter is adjusted to 45HZ-50HZ, the frequency of the frequency converter is consistent with the frequency of power supply of a power grid, the power of the frequency converter and the power of the squirrel-cage motor reach the rated power when the frequency converter and the squirrel-cage motor are started, the starting torque of the squirrel-cage motor correspondingly reaches a large value, and the sintering mixing cylinder is further started easily. At the moment, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is 1.4, the ratio of the power of the frequency converter to the power of the squirrel-cage motor is not only more than 1.25, but also within the range of 1.3-1.5, so that the whole system can be ensured to be normally started, the economic benefit can be considered, the frequency converter with the power far larger than the power of the squirrel-cage motor is not needed to be purchased for matching, and the cost is saved. Meanwhile, when the motor is in a starting mode, the frequency converter enables the starting torque of the squirrel-cage motor to be gentle, the starting impact problem of equipment connected behind the motor is reduced, and the service life of the equipment is prolonged.

After the starting mode lasts for 60s, the sintering and mixing system enters a stable state, the rotating speed of the sintering and mixing cylinder is stable and consistent, at the moment, the output frequency of the frequency converter is adjusted to be Y, the Y is 40HZ, the sintering and mixing system enters the running mode, and the ratio of the X to the Y is 5: 4. Under the frequency of 40HZ, the squirrel-cage motor can still normally run, the sintering and mixing system can normally run, and the energy consumption of the system is reduced due to the reduction of the output frequency of the frequency converter. And the rotation frequency transmitted to the sintering mixing cylinder is correspondingly reduced, the rotation speed is reduced, and the raw materials in the sintering mixing cylinder are mixed more uniformly.

In other embodiments, the duration of the start mode may also be 50s, 80s or 100s, so as to ensure that the sintering and mixing system enters a stable operation mode from start and the rotation speed of the sintering and mixing cylinder is stable. X can also be set to 45HZ, and Y can be set to 35 HZ; x may also be set to 47HZ and Y may be set to 37 HZ. The ratio of X to Y is ensured to be within the range of 5: 3.5-4.

The squirrel-cage motor is adopted in the sintering and mixing system, and due to the structure of the squirrel-cage motor, dust is not easy to adhere to a motor rotor when the sintering and mixing system operates, so that the probability of motor faults is greatly reduced.

FIG. 2 is a schematic diagram of the binder on the inner wall of the sintered mixing cylinder in the embodiment of the present application. In this example, the sintering and mixing system was started at 6/7/13/2021, and at this time, the output frequency of the frequency converter was 50HZ, and the input current of the squirrel-cage motor was 53.12A. And after 1min, switching the starting mode to the running mode. When the sintering and mixing system is switched from a starting mode to an operating mode and the output frequency of the frequency converter is converted from 50HZ to 40HZ, the input current of the squirrel-cage motor is detected to be I₁The current is typically maintained within a range, 39A-43A, in this embodimentIn examples, I₁40.02A. Then continuously detecting the input current of the squirrel-cage motor as I₂Is shown by₁And I₂The recording was performed as shown in table 1. When the sintering and mixing system is in an operation mode, the raw materials are continuously adhered to the inner wall of the sintering and mixing cylinder in the mixing process, and the detected input current I of the squirrel-cage motor is increased along with the increase of the adhered raw materials₂The whole is in an ascending trend, and the two are positively correlated. Input current I of squirrel-cage motor₂The measurement is carried out every 30min, and the time interval can be correspondingly adjusted according to the actual production condition. In this embodiment, when the input current I of the cage motor is detected₂Not less than 60.03A, at this time I₂≥1.5×I₁Satisfy I₂≥1.3×I₁And judging that the materials in the sintering mixing cylinder are seriously bonded, wherein the bonding condition is shown in figure 2. At the moment, the QF3 is cut off, the sintering and mixing system stops running, and personnel enter the sintering and mixing cylinder to clean the adhesive materials.

TABLE 1 input Current of squirrel-cage motors

Using input current I to cage motor in running mode₂Measuring and switching to the input current I in the operating mode₁Carry out the comparison, judge the sizing condition of sintering mixing drum, can be quick accurate learn the sizing condition, in time clear away the sizing, avoided because the clearance untimely, the raw materials of adhesion concreties on the section of thick bamboo wall, both brought the difficulty for the clearance, the raw materials of concretion probably still can drop at clearance in-process bold, brings the potential safety hazard for the clearance personnel. And further set as I₂≥1.5×I₁The binder in the sintering mixing cylinder is cleaned, so that the cleaning period of the binder is reasonable, and the condition that the normal growth is seriously influenced due to frequent shutdown is avoidedThe cleaning machine can also avoid the problem that the cleaning difficulty is increased due to excessive sticky materials caused by overlong cleaning period.

Of course, different companies, different sinter mixing drums will have different evaluations of the severity of the binder, in which case I is adjusted₂And I₁The multiple relation between the two parts can realize the implementation monitoring and judgment of the material sticking condition of the mixed sintering and mixing cylinder. In other embodiments, it can be set that I₂≥1.3×I₁Or I₂≥1.7×I₁And stopping the machine to clean the binder in the sintering mixing cylinder.

Next, the energy consumption of the sintering and mixing system using the wound-rotor motor and the energy consumption of the sintering and mixing system using the frequency converter and the squirrel-cage motor provided in the embodiment of the present application are specifically analyzed.

The winding type motor has the characteristics of large starting torque and the like, the sintering mixing cylinder with the same specification as that of the embodiment of the application can be started by selecting 800kW as rated power, the winding type motor adopts a power frequency operation mode, the frequency of the starting mode and the frequency of the operation mode are both 50HZ, and the input current of the winding type motor is kept between 50 and 53A for a long time. In the embodiment of the application, when the sinter mixing system is in the running mode, the input current of the squirrel-cage motor can be kept between 39A and 43A for a long time due to the frequency reduction from 50Hz to 40Hz, and even if the input current of the motors of the two systems is increased due to the material sticking of the sinter mixing cylinder, the rising trend of the input current of the two systems is basically kept consistent. Therefore, compared with a sintering and mixing system adopting a winding type motor, the input current of the motor of the sintering and mixing system is about 10A smaller, and the energy consumption per hour can be reduced by about 173 degrees. The energy consumption of the sintering and mixing system combining the frequency converter and the squirrel-cage motor provided by the embodiment of the application is far less than that of a winding type motor.

One or/and combination of a plurality of technical schemes in the embodiment of the application has the following beneficial effects:

(1) due to the structure of the squirrel-cage motor, dust is not easy to adhere to a motor rotor when a sintering and mixing system operates, and the probability of motor failure is greatly reduced;

(2) the frequency converter enables the starting torque of the squirrel-cage motor to be smooth, reduces the starting impact problem on the equipment connected behind the frequency converter, and prolongs the service life of the equipment;

(3) the ratio of the output frequency of the frequency converter in the operation mode to the output frequency of the frequency converter in the starting mode is 5:3.5-4, so that the normal operation of a system is ensured, and the effect of reducing energy consumption can be achieved; when the system is in an operation mode, the rotation frequency transmitted to the sintering and mixing cylinder is reduced, and the rotation speed is reduced, so that the raw materials in the sintering and mixing cylinder are mixed more uniformly;

(4) using input current I when cage motor is in running mode₂Measuring and switching to the input current I in the operating mode₁Carry out the comparison, judge the sizing condition of sintering mixing drum, can be quick accurate learn the sizing condition, in time clear away the sizing, avoided because the clearance untimely, the raw materials of adhesion concreties on the section of thick bamboo wall, both brought the difficulty for the clearance, the raw materials of concretion probably still can drop at clearance in-process bold, brings the potential safety hazard for the clearance personnel.

The above description is only a few examples of the present application and is not intended to limit the present application, and various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.