Intelligent preparation system for iron ore pellets

Abstract

The invention relates to the field of iron ore pellet preparation, in particular to an intelligent preparation system for iron ore pellets. The material mixing module is used for mixing materials; the pelletizing module is used for processing the mixed raw materials into iron ore green pellets; the first detection module is used for detecting the iron ore green pellets; the material distribution module is used for distributing the iron ore green pellets; the sintering module is used for sintering the iron ore green pellets; the second detection module is used for detecting the iron ore pellets; and the control module is used for adjusting the operation parameters of the corresponding modules in the preparation system to corresponding values according to the parameters measured in the first detection module and the second detection module, the preparation parameters are optimized, and the stability and the qualified rate of iron ore pellet preparation are improved.

Description

Technical Field

[0001] The invention relates to the field of iron ore pellet preparation, and in particular to an intelligent preparation system for iron ore pellets. Background Art

[0002] Iron ore pellets are made by adding a small amount of additives to finely ground iron ore concentrate or other iron-containing powders, rolling them into balls through a pelletizing machine under the condition of adding water, and then drying and roasting them to consolidate them into spherical iron-containing raw materials with certain strength and metallurgical properties. The domestic preparation of pellets mainly uses vertical furnaces, which have low production efficiency. The chain grate-rotary kiln and belt roasting machine have higher production processes, but they are not used on a large scale, which limits the increase in domestic pellet production.

[0003] During the roasting process, improper temperature control will lead to a decrease in the quality of the pellets. For example, if the roasting temperature is insufficient or the roasting time is insufficient, the bond bridges inside the pellets will not be formed enough, affecting their strength and metallurgical properties. During the pelletizing process, if the particle size of the green pellets is uneven or the strength is insufficient, it will affect the subsequent roasting and smelting process. At the same time, uneven distribution will also cause uneven heating of the pellets in the furnace, affecting the quality of the pellets.

[0004] Chinese patent publication number: CN107794366B, discloses an iron ore pelletizing device, the device comprising: a mineral powder bin, the mineral powder bin contains the mineral powder; a mineral powder belt, the mineral powder belt is arranged below the mineral powder bin, the mineral powder falls from the mineral powder bin to the mineral powder belt; a first pelletizing disk, the first pelletizing disk is connected to the mineral powder belt, the mineral powder is transported to the first pelletizing disk under the action of the mineral powder belt, and the first component of raw balls is generated under the action of the first pelletizing disk; a second pelletizing disk, the second pelletizing disk is arranged below the first pelletizing disk, and the mineral powder that has not been formed into raw balls in the first pelletizing disk and the first component of raw balls enter the second pelletizing disk; and the second component of raw balls is generated under the action of the second pelletizing disk. It can be seen that the above technical solution lacks the necessary detection for iron ore pellets, resulting in a large number of defective products due to the fluctuation of production parameters caused by wear or aging of the manufacturing equipment. Summary of the invention

[0005] To this end, the present invention provides an intelligent preparation system for iron ore pellets, which is used to overcome the problem in the prior art that due to the lack of necessary detection of iron ore pellets, the manufacturing equipment is worn or aged, resulting in fluctuations in production parameters and a large number of defective products.

[0006] To achieve the above object, the present invention provides an intelligent preparation system for iron ore pellets, comprising:

[0007] Batching module, which is used to output various raw materials according to the set flow rate;

[0008] A mixing module, which is arranged at the output end of the batching module, comprises a mixing bin, a stirring wheel arranged at the bottom of the mixing bin, a first motor connected to the stirring wheel for driving the stirring wheel to rotate, and a discharge port arranged at the bottom of the mixing bin;

[0009] A ball-making module, which is arranged at the output end of the mixing module, comprises a disc-shaped ball-making pool rotating along the center, a second motor arranged at the bottom of the ball-making pool for driving the ball-making pool to rotate, a scraper arranged inside the ball-making pool and in contact with the inner wall of the ball-making pool, and a water spraying device arranged at the bottom of the ball-making pool for humidifying the raw materials inside the ball-making pool, wherein a preset angle is set between the bottom surface of the ball-making pool and the horizontal plane;

[0010] A first detection module, which is arranged at the output end of the pelletizing module, includes a strength detection unit for obtaining the compressive strength of the iron ore green pellets after pelletizing, an image detection unit for obtaining the size of the iron ore green pellets, and a weighing unit for obtaining the proportion of powder in the iron ore green pellets;

[0011] A material distribution module is provided at the output end of the pelletizing module, comprising a material distribution bin for storing the raw iron ore pellets, a material distribution channel provided at the output end of the material distribution bin, and a material distribution port provided at the end of the material distribution channel, wherein a material discharging roller is provided inside the material distribution channel, a third motor for driving the material discharging roller, and a baffle plate for controlling the channel diameter between the material discharging roller and the material distribution channel;

[0012] a sintering module, which is arranged at the output end of the material distribution module, and comprises a conveyor belt for conveying the iron ore green pellets, a heating wire arranged above the conveyor belt for heating the iron ore green pellets, and a fourth motor for driving the conveyor belt;

[0013] A second detection module is arranged at the output end of the sintering module, and is used to obtain the low-temperature reduction pulverization rate of the iron ore pellets that have completed sintering;

[0014] A control module is respectively connected to the first detection module, the second detection module, the pelletizing module, the distribution module and the sintering module, and is used to preliminarily determine whether the preparation of a single batch of iron ore green pellets meets the preset standard based on the green pellet forming evaluation value, and to determine whether the preparation of the iron ore pellets after sintering meets the preset standard based on the low-temperature reduction pulverization rate.

[0015] Furthermore, the control module preliminarily determines whether the preparation of a single batch of iron ore green pellets meets a preset standard according to the green pellet forming evaluation value, wherein:

[0016] If the green pellet forming evaluation value is less than a first preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets meets the preset standard, and transports the batch of iron ore green pellets that meet the preset standard to the distribution module;

[0017] If the green pellet forming evaluation value is greater than or equal to the first preset evaluation threshold and less than the second preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and secondarily determines whether the preparation of the batch of iron ore green pellets meets the preset standard based on the size uniformity characteristic value;

[0018] If the green pellet forming evaluation value is greater than or equal to the second preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and increases the water spraying amount of the water spraying device for the next batch of iron ore green pellets according to the difference between the green pellet forming evaluation value and the second preset evaluation threshold.

[0019] Furthermore, the green pellet forming evaluation value is determined by the proportion of iron ore green pelletizing powder and the compressive strength of iron ore green pelletizing.

[0020] Furthermore, the control module secondarily determines whether the preparation of the batch of iron ore green pellets meets the preset standard according to the size uniformity characteristic value, wherein:

[0021] If the size uniformity characteristic value is less than the first preset uniformity characteristic threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets meets the preset standard, and transports the batch of iron ore green pellets that meet the preset standard to the distribution module;

[0022] If the size uniformity characteristic value is greater than or equal to the first preset uniformity characteristic threshold and less than the second preset uniformity characteristic threshold, the control module secondarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and reduces the operating power of the second motor according to the difference between the size uniformity characteristic value and the first preset uniformity characteristic threshold;

[0023] If the size uniformity characteristic value is greater than or equal to the second preset uniformity characteristic threshold, the control module determines for the second time that the preparation of the batch of iron ore green pellets does not meet the preset standard, and reduces the atomized particle size of the water used by the water spraying device to humidify the raw materials according to the difference between the size uniformity characteristic value and the second preset uniformity characteristic threshold.

[0024] Furthermore, the control module is provided with several power adjustment methods for reducing the operating power of the second motor, and each power adjustment method has a different reduction range for the operating power of the second motor.

[0025] Furthermore, the control module is provided with several power correction methods for the operating power of the second motor under a first preset condition, and each power correction method has a different correction amplitude for the operating power of the second motor; the first preset condition is that the control module completes the adjustment of the operating power of the second motor and the compressive strength of the iron ore green pellets in the adjusted batch is less than the compressive strength threshold.

[0026] Furthermore, the control module determines whether the preparation of the iron ore pellets after sintering meets the preset standard according to the low-temperature reduction pulverization rate, wherein:

[0027] If the low-temperature reduction pulverization rate is less than the first preset low-temperature reduction pulverization rate, the control module determines that the preparation of the sintered iron ore pellets meets the preset standard, and continues to prepare the next batch of iron ore pellets according to the current preparation parameters;

[0028] If the low-temperature reduction pulverization rate is greater than or equal to the first preset low-temperature reduction pulverization rate and less than the second preset low-temperature reduction pulverization rate, the control module determines that the preparation of the iron ore pellets after sintering does not meet the preset standard, and reduces the transmission speed of the fourth motor according to the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate;

[0029] If the low-temperature reduction pulverization rate is greater than or equal to the second preset low-temperature reduction pulverization rate, the control module determines that the preparation of the iron ore pellets after sintering does not meet the preset standard, and determines the reason why the preparation of the iron ore pellets does not meet the preset standard based on the low-temperature reduction pulverization rate fluctuation characteristic value.

[0030] Furthermore, the control module reduces the transmission speed of the fourth motor according to the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate, wherein:

[0031] If the pulverization rate difference is less than the first preset pulverization rate difference, the control module uses the first preset speed adjustment coefficient to reduce the transmission speed of the fourth motor to a corresponding value;

[0032] If the pulverization rate difference is greater than or equal to the first preset pulverization rate difference and less than the second preset pulverization rate difference, the control module uses the second preset speed adjustment coefficient to reduce the transmission speed of the fourth motor to a corresponding value;

[0033] If the pulverization rate difference is greater than or equal to the second preset pulverization rate difference, the control module uses a third preset speed adjustment coefficient to reduce the transmission speed of the fourth motor to a corresponding value;

[0034] The pulverization rate difference is the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate.

[0035] Furthermore, the control module determines the reason why the preparation of iron ore pellets does not meet the preset standard according to the low-temperature reduction pulverization rate fluctuation characteristic value, wherein:

[0036] If the low-temperature reduction pulverization rate fluctuation characteristic value is less than the preset fluctuation characteristic threshold, the control module determines that the reason why the preparation of the iron ore pellets does not meet the preset standard is that the sintering temperature of the iron ore pellets does not meet the standard, and increases the heating power of the electric heating wire of the sintering module to a corresponding value according to the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold;

[0037] If the low-temperature reduction pulverization rate fluctuation characteristic value is greater than or equal to the preset fluctuation characteristic threshold, the control module determines that the reason why the preparation of the iron ore pellets does not meet the preset standard is that the distribution of the iron ore green pellets does not meet the standard, and reduces the channel diameter of the distribution module according to the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold;

[0038] The low-temperature reduction pulverization rate fluctuation characteristic value is the extreme difference of the low-temperature reduction pulverization rate of a single batch of iron ore pellets sampled.

[0039] Furthermore, the control module increases the heating power of the heating wire of the sintering module according to the difference between the pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold, wherein:

[0040] If the fluctuation characteristic difference is less than the first preset fluctuation characteristic difference, the control module uses the first preset heating power adjustment coefficient to increase the heating power of the heating wire to a corresponding value;

[0041] If the fluctuation characteristic difference is greater than or equal to the first preset fluctuation characteristic difference and less than the second preset fluctuation characteristic difference, the control module uses the second preset heating power adjustment coefficient to increase the heating power of the heating wire to a corresponding value;

[0042] If the fluctuation characteristic difference is greater than or equal to the second preset fluctuation characteristic difference, the control module uses a third preset heating power adjustment coefficient to increase the heating power of the heating wire to a corresponding value;

[0043] The fluctuation characteristic difference is the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention includes a batching module for outputting raw materials; a mixing module for mixing; a pelletizing module for processing the mixed raw materials into iron ore green pellets; a first detection module for detecting the iron ore green pellets; a distribution module for distributing the iron ore green pellets; a sintering module for sintering the iron ore green pellets; a second detection module for detecting the iron ore pellets; and a control module for adjusting the operating parameters of the corresponding modules in the preparation system to the corresponding values ​​according to the parameters measured in the first detection module and the second detection module, thereby optimizing the preparation parameters and improving the stability and qualified rate of the iron ore pellet preparation.

[0045] Furthermore, the control module determines the raw pellet forming evaluation value of the iron ore raw pellets according to the pelletizing powder proportion and compressive strength of the iron ore raw pellets measured by the first detection module, preliminarily determines whether the preparation of the iron ore raw pellets meets the preset standards, and performs a secondary judgment on the raw pellets that do not meet the preset standards.

[0046] Furthermore, the control module determines whether the preparation of the single batch of iron ore green pellets meets the preset standards through the size uniformity characteristic value. If it does not meet the preset standards, it determines the problems in the preparation process and adjusts the parameters of the corresponding modules in the preparation system to improve the quality of the iron ore green pellets.

[0047] Furthermore, the control module is provided with several power adjustment methods for reducing the operating power of the second motor according to the compressive strength of the iron ore green pellets, and is provided with several power correction methods for the operating power of the second motor. By adjusting the operating power of the second motor, it is ensured that the compressive strength of the iron ore green pellets is less than the compressive strength threshold.

[0048] Furthermore, the control module determines whether the preparation of the sintered iron ore pellets meets the preset standard based on the low-temperature reduction pulverization rate measured by the second detection module. If it does not meet the preset standard, the transmission speed of the fourth motor is reduced based on the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate.

[0049] Furthermore, the control module determines the reason why the preparation of iron ore pellets does not meet the preset standards based on the low-temperature reduction pulverization rate fluctuation characteristic value. If the reason is that the sintering temperature of the iron ore pellets does not meet the standard, the heating power of the heating wire of the sintering module is increased; if the reason is that the distribution of the iron ore raw pellets does not meet the standard, the channel diameter of the distribution module is reduced.

[0050] Furthermore, the control module is provided with different heating power adjustment modes of the heating wire, and the corresponding sintering temperature is increased, thereby ensuring that the sintering temperature of the iron ore pellets meets the standards, and finally obtaining the iron ore pellet products that meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a schematic diagram of the structure of a pelletizing module of an intelligent preparation system for iron ore pellets according to an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the structure of a distribution module of an intelligent preparation system for iron ore pellets according to an embodiment of the present invention;

[0053] Figure 3 This is a schematic structural diagram of a module of an intelligent preparation system for iron ore pellets according to an embodiment of the present invention;

[0054] Figure 4 A flow chart for preliminarily determining whether the preparation of a single batch of iron ore green pellets meets a preset standard in an embodiment of the present invention;

[0055] Figure 5 This is a flow chart of reducing the operating power of the second motor according to an embodiment of the present invention.

[0056] In the figure: 11, ball making pool; 12, second motor; 13, scraper; 14, water spray device; 21, material distribution bin; 22, material distribution channel; 23, material distribution port; 24, discharge roller; 25, third motor; 26, baffle plate. DETAILED DESCRIPTION

[0057] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] Those skilled in the art will appreciate that the system of the present invention may determine a single parameter by selecting the value with the highest proportion as the preset standard parameter based on data distribution, using weighted summation to take the obtained value as the preset standard parameter, substituting each historical data into a specific formula and taking the value obtained by using the formula as the preset standard parameter, or other selection methods, as long as the system of the present invention can clearly define different specific situations in a single determination process through the obtained values.

[0059] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0060] See also Figure 1-Figure 5As shown, they are respectively a schematic diagram of the pelletizing module structure of the intelligent preparation system for iron ore pellets according to an embodiment of the present invention; a schematic diagram of the distribution module structure of the intelligent preparation system for iron ore pellets according to an embodiment of the present invention; a schematic diagram of the module structure of the intelligent preparation system for iron ore pellets according to an embodiment of the present invention; a flowchart of the embodiment of the present invention for preliminarily determining whether the preparation of a single batch of iron ore raw pellets meets the preset standards; a flowchart of the reduction adjustment of the operating power of the second motor according to an embodiment of the present invention.

[0061] An intelligent preparation system for iron ore pellets according to an embodiment of the present invention comprises:

[0062] The batching module is used to output various raw materials according to the set flow rate. It can be understood that the batching module realizes the quantitative output of various raw materials through the cooperation of the solenoid valve and the pipeline, or the cooperation of the auger and the pipeline;

[0063] A mixing module, which is arranged at the output end of the batching module, comprises a mixing bin, a stirring wheel arranged at the bottom of the mixing bin, a first motor connected to the stirring wheel for driving the stirring wheel to rotate, and a discharge port arranged at the bottom of the mixing bin;

[0064] A ball-making module, which is arranged at the output end of the mixing module, comprises a disc-shaped ball-making pool 11 rotating along the center, a second motor 12 arranged at the bottom of the ball-making pool 11 for driving the ball-making pool 11 to rotate, a scraper 13 arranged inside the ball-making pool 11 and in contact with the inner wall of the ball-making pool 11, and a water spray device 14 arranged at the bottom of the ball-making pool 11 for humidifying the raw materials inside the ball-making pool 11, wherein the bottom surface of the ball-making pool 11 is arranged at a preset angle with the horizontal plane;

[0065] A first detection module, which is arranged at the output end of the pelletizing module, includes a strength detection unit for obtaining the compressive strength of the iron ore green pellets after pelletizing, an image detection unit for obtaining the size of the iron ore green pellets, and a weighing unit for obtaining the proportion of powder in the iron ore green pellets;

[0066] A material distribution module, which is provided at the output end of the pelletizing module, comprises a material distribution bin 21 for storing the raw iron ore pellets, a material distribution channel 22 provided at the output end of the material distribution bin 21, and a material distribution port 23 provided at the end of the material distribution channel 22, wherein a material discharging roller 24 is provided inside the material distribution channel 22, a third motor 25 for driving the material discharging roller 24, and a material baffle plate 26 for controlling the channel diameter between the material discharging roller 25 and the material distribution channel 22;

[0067] a sintering module, which is arranged at the output end of the material distribution module, and comprises a conveyor belt for conveying the iron ore green pellets, a heating wire arranged above the conveyor belt for heating the iron ore green pellets, and a fourth motor for driving the conveyor belt;

[0068] A second detection module is arranged at the output end of the sintering module, and is used to obtain the low-temperature reduction pulverization rate of the iron ore pellets that have completed sintering;

[0069] A control module is respectively connected to the first detection module, the second detection module, the pelletizing module, the distribution module and the sintering module, and is used to preliminarily determine whether the preparation of a single batch of iron ore green pellets meets the preset standard based on the green pellet forming evaluation value, and to determine whether the preparation of the iron ore pellets after sintering meets the preset standard based on the low-temperature reduction pulverization rate.

[0070] Specifically, the composition and proportion of the iron ore pellets are not limited, and the corresponding composition and proportion can be determined according to actual production.

[0071] Specifically, the mixing module is, for example, a commercial barrel-type stirring mixer, which is not specifically limited, and is used to complete the mixing of the raw materials of the iron ore pellets.

[0072] Specifically, the sintering module, such as a chain sintering furnace, is used to complete the sintering of iron ore green pellets without specific limitation.

[0073] Specifically, the strength detection unit, such as a pressure testing machine, is not specifically limited and is used to obtain the compressive strength of the iron ore green pellets that have completed pelletizing. In this embodiment, pressure is applied to the pressure testing machine until the iron ore green pellets are completely broken, and the maximum pressure load is recorded and used as the compressive strength of the iron ore green pellets.

[0074] Specifically, the image detection unit, such as an industrial camera, is not specifically limited and acquires the size of the iron ore green pellets through image acquisition and image processing.

[0075] Specifically, the weighing unit determines the proportion of iron ore green pelletizing powder by weighing the weight of material particles smaller than a preset particle size after a single batch of iron ore green pelletizing and the proportion of raw material input for preparing green pellets. The particle size of the preset particle size material particles is, for example, 4 mm, which is not specifically limited and can be set according to actual preparation.

[0076] Specifically, the low-temperature reduction pulverization rate is measured and obtained in accordance with "GB_T13242-2017 Iron Ore Low-Temperature Pulverization Test Method Using Cold Drum After Static Reduction".

[0077] Specifically, the control module preliminarily determines whether the preparation of a single batch of iron ore green pellets meets the preset standard according to the green pellet forming evaluation value, wherein:

[0078] If the green pellet forming evaluation value is less than the first preset evaluation threshold value of 0.73, the control module preliminarily determines that the preparation of the batch of iron ore green pellets meets the preset standard, and transports the batch of iron ore green pellets that meet the preset standard to the distribution module;

[0079] If the green pellet forming evaluation value is greater than or equal to the first preset evaluation threshold and less than the second preset evaluation threshold of 0.97, the control module preliminarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and secondarily determines whether the preparation of the batch of iron ore green pellets meets the preset standard based on the size uniformity characteristic value;

[0080] If the green pellet forming evaluation value is greater than or equal to the second preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and increases the water spraying amount of the water spraying device for the next batch of iron ore green pellets according to the difference between the green pellet forming evaluation value and the second preset evaluation threshold.

[0081] Specifically, the raw ball forming evaluation value is calculated by the following formula:

[0082]

[0083] In the formula, E represents the evaluation value of green ball forming, α represents the first evaluation coefficient, α is set to 0.72, F represents the proportion of powder in iron ore green pelletizing, Fy represents the threshold of powder proportion, Fy is set to 3.5%, β represents the second evaluation coefficient, β is set to 0.21, σ represents the compressive strength of iron ore green pellets, σy represents the compressive strength threshold, and σy is set to 65N.

[0084] Specifically, the compressive strength of iron ore green pellets is recorded as the average compressive strength of several iron ore green pellets sampled from a single batch of iron ore green pellets. For example, 25 iron ore green pellets are sampled from a single batch of 1000 iron ore green pellets. The sampling ratio is not specifically limited and can be determined based on the actual preparation process.

[0085] Specifically, the control module determines whether the preparation of the batch of iron ore green pellets meets the preset standard based on the size uniformity characteristic value, wherein:

[0086] If the size uniformity characteristic value is less than the first preset uniformity characteristic threshold value of 0.05, the control module preliminarily determines that the preparation of the batch of iron ore green pellets meets the preset standard, and transports the batch of iron ore green pellets that meet the preset standard to the distribution module;

[0087] If the size uniformity characteristic value is greater than or equal to the first preset uniformity characteristic threshold and less than the second preset uniformity characteristic threshold of 0.12, the control module secondarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and reduces the operating power of the second motor according to the difference between the size uniformity characteristic value and the first preset uniformity characteristic threshold;

[0088] If the size uniformity characteristic value is greater than or equal to the second preset uniformity characteristic threshold, the control module determines for the second time that the preparation of the batch of iron ore green pellets does not meet the preset standard, and reduces the atomized particle size of the water used by the water spray device to humidify the raw materials according to the difference between the size uniformity characteristic value and the second preset uniformity characteristic threshold;

[0089] The size uniformity characteristic value is the variance of the size of a single batch of iron ore green pellets, wherein the size of the iron ore green pellets is the diameter of the iron ore green pellets, and its unit is mm.

[0090] Specifically, the control module reduces the operating power of the second motor according to the difference between the size uniformity characteristic value and the first preset uniformity characteristic threshold, wherein:

[0091] If the uniformity difference is less than the first preset uniformity difference of 0.021, the control module uses the first preset power adjustment coefficient of 0.98 to reduce the operating power of the second motor to a corresponding value;

[0092] If the uniformity difference is greater than or equal to the first preset uniformity difference and less than the second preset uniformity difference of 0.053, the control module uses the second preset power adjustment coefficient of 0.95 to reduce the operating power of the second motor to a corresponding value;

[0093] If the uniformity difference is greater than or equal to the second preset uniformity difference, the control module uses a third preset power adjustment coefficient of 0.90 to reduce the operating power of the second motor to a corresponding value;

[0094] The uniformity difference is a difference between the size uniformity characteristic value and the first preset uniformity characteristic threshold.

[0095] Specifically, the control module corrects the operating power of the second motor according to the correction difference under the first preset condition, wherein:

[0096] If the correction difference is less than the first preset correction difference of 5.2N, the control module uses the first preset power correction coefficient of 1.002 to increase the operating power of the second motor to a corresponding value;

[0097] If the correction difference is greater than or equal to the first preset correction difference and less than the second preset correction difference of 12.5N, the control module uses the second preset power correction coefficient of 1.007 to increase the operating power of the second motor to a corresponding value;

[0098] If the correction difference is greater than or equal to the second preset correction difference, the control module uses a third preset power correction coefficient of 1.012 to increase the operating power of the second motor to a corresponding value;

[0099] The corrected difference is the difference between the compressive strength threshold and the adjusted compressive strength of the batch of iron ore green pellets;

[0100] The first preset condition is that the control module completes the adjustment of the operating power of the second motor and the compressive strength of the adjusted batch of iron ore green pellets is less than a compressive strength threshold.

[0101] Specifically, the control module determines whether the preparation of the iron ore pellets after sintering meets the preset standard according to the low-temperature reduction pulverization rate, wherein:

[0102] If the low-temperature reduction pulverization rate is less than the first preset low-temperature reduction pulverization rate of 15.00%, the control module determines that the preparation of the sintered iron ore pellets meets the preset standard, and continues to prepare the next batch of iron ore pellets according to the current preparation parameters;

[0103] If the low-temperature reduction pulverization rate is greater than or equal to the first preset low-temperature reduction pulverization rate and less than the second preset low-temperature reduction pulverization rate of 18.50%, the control module determines that the preparation of the iron ore pellets after sintering does not meet the preset standard, and reduces the transmission speed of the fourth motor according to the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate;

[0104] If the low-temperature reduction pulverization rate is greater than or equal to the second preset low-temperature reduction pulverization rate, the control module determines that the preparation of the iron ore pellets after sintering does not meet the preset standard, and determines the reason why the preparation of the iron ore pellets does not meet the preset standard based on the low-temperature reduction pulverization rate fluctuation characteristic value.

[0105] Specifically, the control module reduces the transmission speed of the fourth motor according to the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate, wherein:

[0106] If the pulverization rate difference is less than the first preset pulverization rate difference of 1.20%, the control module uses the first preset speed adjustment coefficient of 0.97 to reduce the transmission speed of the fourth motor to a corresponding value;

[0107] If the pulverization rate difference is greater than or equal to the first preset pulverization rate difference and less than the second preset pulverization rate difference of 2.8%, the control module uses the second preset speed adjustment coefficient of 0.95 to reduce the transmission speed of the fourth motor to a corresponding value;

[0108] If the pulverization rate difference is greater than or equal to the second preset pulverization rate difference, the control module uses a third preset speed adjustment coefficient of 0.92 to reduce the transmission speed of the fourth motor to a corresponding value;

[0109] The pulverization rate difference is the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate.

[0110] Specifically, the control module determines the reason why the preparation of iron ore pellets does not meet the preset standard according to the low-temperature reduction pulverization rate fluctuation characteristic value, wherein:

[0111] If the low-temperature reduction pulverization rate fluctuation characteristic value is less than the preset fluctuation characteristic threshold value of 7.25%, the control module determines that the reason why the preparation of the iron ore pellets does not meet the preset standard is that the sintering temperature of the iron ore pellets does not meet the standard, and increases the heating power of the electric heating wire of the sintering module to a corresponding value according to the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold value;

[0112] If the low-temperature reduction pulverization rate fluctuation characteristic value is greater than or equal to the preset fluctuation characteristic threshold, the control module determines that the reason why the preparation of the iron ore pellets does not meet the preset standard is that the distribution of the iron ore green pellets does not meet the standard, and reduces the channel diameter of the distribution module according to the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold;

[0113] The low-temperature reduction pulverization rate fluctuation characteristic value is the extreme difference of the low-temperature reduction pulverization rate of a single batch of iron ore pellets sampled.

[0114] Specifically, the control module increases the heating power of the heating wire of the sintering module according to the difference between the pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold, wherein:

[0115] If the fluctuation characteristic difference is less than the first preset fluctuation characteristic difference of 1.60%, the control module uses the first preset heating power adjustment coefficient of 1.01 to increase the heating power of the heating wire to a corresponding value;

[0116] If the fluctuation characteristic difference is greater than or equal to the first preset fluctuation characteristic difference and less than 2.85% of the second preset fluctuation characteristic difference, the control module uses the second preset heating power adjustment coefficient of 1.02 to increase the heating power of the heating wire to a corresponding value;

[0117] If the fluctuation characteristic difference is greater than or equal to the second preset fluctuation characteristic difference, the control module uses the third preset heating power adjustment coefficient 1.04 to increase the heating power of the heating wire to a corresponding value;

[0118] The fluctuation characteristic difference is the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold.

[0119] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0120] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent preparation system for iron ore pellets, characterized in that: include: Batching module, which is used to output various raw materials according to the set flow rate; A mixing module, which is arranged at the output end of the batching module, comprises a mixing bin, a stirring wheel arranged at the bottom of the mixing bin, a first motor connected to the stirring wheel for driving the stirring wheel to rotate, and a discharge port arranged at the bottom of the mixing bin; A ball-making module, which is arranged at the output end of the mixing module, comprises a disc-shaped ball-making pool rotating along the center, a second motor arranged at the bottom of the ball-making pool for driving the ball-making pool to rotate, a scraper arranged inside the ball-making pool and in contact with the inner wall of the ball-making pool, and a water spraying device arranged at the bottom of the ball-making pool for humidifying the raw materials inside the ball-making pool, wherein a preset angle is set between the bottom surface of the ball-making pool and the horizontal plane; A first detection module, which is arranged at the output end of the pelletizing module, includes a strength detection unit for obtaining the compressive strength of the iron ore green pellets after pelletizing, an image detection unit for obtaining the size of the iron ore green pellets, and a weighing unit for obtaining the proportion of powder in the iron ore green pellets; A material distribution module is provided at the output end of the pelletizing module, comprising a material distribution bin for storing the raw iron ore pellets, a material distribution channel provided at the output end of the material distribution bin, and a material distribution port provided at the end of the material distribution channel, wherein a material discharging roller is provided inside the material distribution channel, a third motor for driving the material discharging roller, and a baffle plate for controlling the channel diameter between the material discharging roller and the material distribution channel; a sintering module, which is arranged at the output end of the material distribution module, and comprises a conveyor belt for conveying the iron ore green pellets, a heating wire arranged above the conveyor belt for heating the iron ore green pellets, and a fourth motor for driving the conveyor belt; A second detection module is arranged at the output end of the sintering module, and is used to obtain the low-temperature reduction pulverization rate of the iron ore pellets that have completed sintering; A control module is respectively connected to the first detection module, the second detection module, the pelletizing module, the distribution module and the sintering module, and is used to preliminarily determine whether the preparation of a single batch of iron ore green pellets meets the preset standard based on the green pellet forming evaluation value, and to determine whether the preparation of the iron ore pellets after sintering meets the preset standard based on the low-temperature reduction pulverization rate.

2. The intelligent preparation system for iron ore pellets according to claim 1, characterized in that: The control module preliminarily determines whether the preparation of a single batch of iron ore green pellets meets the preset standard according to the green pellet forming evaluation value, wherein: If the green pellet forming evaluation value is less than a first preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets meets the preset standard, and transports the batch of iron ore green pellets that meet the preset standard to the distribution module; If the green pellet forming evaluation value is greater than or equal to the first preset evaluation threshold and less than the second preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and secondarily determines whether the preparation of the batch of iron ore green pellets meets the preset standard based on the size uniformity characteristic value; If the green pellet forming evaluation value is greater than or equal to the second preset evaluation threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and increases the water spraying amount of the water spraying device for the next batch of iron ore green pellets according to the difference between the green pellet forming evaluation value and the second preset evaluation threshold.

3. The intelligent preparation system for iron ore pellets according to claim 2, characterized in that: The green pellet forming evaluation value is determined by the proportion of iron ore green pelletizing powder and the compressive strength of iron ore green pelletizing.

4. The intelligent preparation system for iron ore pellets according to claim 3, characterized in that: The control module determines whether the preparation of the batch of iron ore green pellets meets the preset standard based on the size uniformity characteristic value, wherein: If the size uniformity characteristic value is less than the first preset uniformity characteristic threshold, the control module preliminarily determines that the preparation of the batch of iron ore green pellets meets the preset standard, and transports the batch of iron ore green pellets that meet the preset standard to the distribution module; If the size uniformity characteristic value is greater than or equal to the first preset uniformity characteristic threshold and less than the second preset uniformity characteristic threshold, the control module secondarily determines that the preparation of the batch of iron ore green pellets does not meet the preset standard, and reduces the operating power of the second motor according to the difference between the size uniformity characteristic value and the first preset uniformity characteristic threshold; If the size uniformity characteristic value is greater than or equal to the second preset uniformity characteristic threshold, the control module determines for the second time that the preparation of the batch of iron ore green pellets does not meet the preset standard, and reduces the atomized particle size of the water used by the water spraying device to humidify the raw materials according to the difference between the size uniformity characteristic value and the second preset uniformity characteristic threshold.

5. The intelligent preparation system for iron ore pellets according to claim 4, characterized in that: The control module is provided with several power adjustment modes for reducing the operating power of the second motor, and each power adjustment mode has a different reduction range for the operating power of the second motor.

6. The intelligent preparation system for iron ore pellets according to claim 5, characterized in that: The control module is provided with several power correction methods for the operating power of the second motor under the first preset condition, and each power correction method has a different correction amplitude for the operating power of the second motor; the first preset condition is that the control module completes the adjustment of the operating power of the second motor and the compressive strength of the iron ore green pellets in the adjusted batch is less than the compressive strength threshold.

7. The intelligent preparation system for iron ore pellets according to claim 6, characterized in that: The control module determines whether the preparation of the iron ore pellets after sintering meets the preset standard according to the low-temperature reduction pulverization rate, wherein: If the low-temperature reduction pulverization rate is less than the first preset low-temperature reduction pulverization rate, the control module determines that the preparation of the sintered iron ore pellets meets the preset standard, and continues to prepare the next batch of iron ore pellets according to the current preparation parameters; If the low-temperature reduction pulverization rate is greater than or equal to the first preset low-temperature reduction pulverization rate and less than the second preset low-temperature reduction pulverization rate, the control module determines that the preparation of the iron ore pellets after sintering does not meet the preset standard, and reduces the transmission speed of the fourth motor according to the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate; If the low-temperature reduction pulverization rate is greater than or equal to the second preset low-temperature reduction pulverization rate, the control module determines that the preparation of the iron ore pellets after sintering does not meet the preset standard, and determines the reason why the preparation of the iron ore pellets does not meet the preset standard based on the low-temperature reduction pulverization rate fluctuation characteristic value.

8. The intelligent preparation system for iron ore pellets according to claim 7, characterized in that: The control module reduces the transmission speed of the fourth motor according to the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate, wherein: If the pulverization rate difference is less than the first preset pulverization rate difference, the control module uses the first preset speed adjustment coefficient to reduce the transmission speed of the fourth motor to a corresponding value; If the pulverization rate difference is greater than or equal to the first preset pulverization rate difference and less than the second preset pulverization rate difference, the control module uses the second preset speed adjustment coefficient to reduce the transmission speed of the fourth motor to a corresponding value; If the pulverization rate difference is greater than or equal to the second preset pulverization rate difference, the control module uses a third preset speed adjustment coefficient to reduce the transmission speed of the fourth motor to a corresponding value; The pulverization rate difference is the difference between the low-temperature reduction pulverization rate and the first preset low-temperature reduction pulverization rate.

9. The intelligent preparation system for iron ore pellets according to claim 8, characterized in that: The control module determines the reason why the preparation of iron ore pellets does not meet the preset standard according to the low-temperature reduction pulverization rate fluctuation characteristic value, wherein: If the low-temperature reduction pulverization rate fluctuation characteristic value is less than the preset fluctuation characteristic threshold, the control module determines that the reason why the preparation of the iron ore pellets does not meet the preset standard is that the sintering temperature of the iron ore pellets does not meet the standard, and increases the heating power of the electric heating wire of the sintering module to a corresponding value according to the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold; If the low-temperature reduction pulverization rate fluctuation characteristic value is greater than or equal to the preset fluctuation characteristic threshold, the control module determines that the reason why the preparation of the iron ore pellets does not meet the preset standard is that the distribution of the iron ore green pellets does not meet the standard, and reduces the channel diameter of the distribution module according to the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold; The low-temperature reduction pulverization rate fluctuation characteristic value is the extreme difference of the low-temperature reduction pulverization rate of a single batch of iron ore pellets sampled.

10. The intelligent preparation system for iron ore pellets according to claim 9, characterized in that: The control module increases the heating power of the heating wire of the sintering module according to the difference between the pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold value, wherein: If the fluctuation characteristic difference is less than the first preset fluctuation characteristic difference, the control module uses the first preset heating power adjustment coefficient to increase the heating power of the heating wire to a corresponding value; If the fluctuation characteristic difference is greater than or equal to the first preset fluctuation characteristic difference and less than the second preset fluctuation characteristic difference, the control module uses the second preset heating power adjustment coefficient to increase the heating power of the heating wire to a corresponding value; If the fluctuation characteristic difference is greater than or equal to the second preset fluctuation characteristic difference, the control module uses a third preset heating power adjustment coefficient to increase the heating power of the heating wire to a corresponding value; The fluctuation characteristic difference is the difference between the low-temperature reduction pulverization rate fluctuation characteristic value and the preset fluctuation characteristic threshold.

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