阅读说明：本技术 一种高炉布料调剂方法 (Blast furnace material distribution and adjustment method ) 是由 李佳 陈帅 唐志文 罗石元 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种高炉布料调剂方法。该方法采用一种高炉布料调剂系统进行监控调剂,所述高炉布料调剂系统包括溜槽、雷达测量组件、驱动电机、计算机控制单元,所述雷达测量组件在驱动电机控制下可自由转动,所述计算机控制单元分别与雷达测量组件、驱动电机相连,所述雷达测量系统置于炉顶椎台内侧；该系统及方法可以实现高炉关键参数可视化,加快炉料和煤气流之间的还原效率,这将极大加快高炉回复的速度与质量。(The invention discloses a blast furnace burden distribution and adjustment method. The method adopts a blast furnace material distribution and adjustment system for monitoring and adjusting the material, wherein the blast furnace material distribution and adjustment system comprises a chute, a radar measuring component, a driving motor and a computer control unit, the radar measuring component can freely rotate under the control of the driving motor, the computer control unit is respectively connected with the radar measuring component and the driving motor, and the radar measuring system is arranged on the inner side of a cone table at the top of a furnace; the system and the method can realize the visualization of the key parameters of the blast furnace, accelerate the reduction efficiency between the furnace burden and the coal gas flow, and greatly accelerate the speed and the quality of the blast furnace recovery.)

1. A blast furnace burden distribution and adjustment method is characterized by comprising the following steps: a blast furnace material distribution and adjustment system is adopted for monitoring and adjusting,

the blast furnace material distribution and adjustment system comprises a chute, a radar measuring component, a driving motor and a computer control unit, wherein the radar measuring component can rotate freely under the control of the driving motor, the computer control unit is respectively connected with the radar measuring component and the driving motor, and the radar measuring component is arranged at a vertebral platform on the upper part of a blast furnace body;

the blast furnace burden distribution and adjustment method comprises the following steps:

the method comprises the following steps: the blast furnace is alternately loaded into the furnace top through coke and ore to form the charge level distribution to be observed;

step two: setting a scanning track of a radar when a charge level is to be observed, scanning the track by using a radar measuring component every interval period under a normal material distribution state, wherein the radar measuring component takes circles with different radiuses as tracks in each scanning process to determine the charge level shape in the circumferential direction of the blast furnace;

step three: storing three-dimensional coordinates of the charge level obtained by scanning, and connecting the coordinates into a space curve as an observed charge level result;

step four: evaluating the characteristics of the charge level, determining abnormal deformation of the charge level when the non-uniform degree of the charge level is found to exceed a critical value, and determining the position and degree of the deformation of the charge level;

step five: distributing the charge level which is determined to be abnormally deformed in a concentrated manner at the collapse part by adopting a fan-shaped distribution mode in a fixed area, and filling the charge level for deformation, wherein the charge level for the deformation is filled up with the collapsed charge level on one hand, and the energy and reduction burden caused by the collapse are supplemented by coke on the other hand;

step six: and after the directional material distribution and adjustment is carried out, scanning in the circumferential direction is carried out by using a radar measuring component, the material level adjustment effect is evaluated by using the scanning result, if the material level deformation does not exceed a critical value, the material level correction is stopped, normal material distribution is carried out, otherwise, the material level correction is continued, until the material level is recovered to be normal, a normal material distribution mode is started, and monitoring and scanning are carried out by using the radar measuring component every interval period.

2. The blast furnace burden distribution and adjustment method according to claim 1, characterized in that: the radar measurement assembly comprises a track generation unit, a link mechanism and a horn antenna unit, wherein the track generation unit is connected with the link mechanism, the link mechanism is connected with the horn antenna unit, and the track generation unit drives the horn antenna unit to rotate through the link mechanism.

3. The blast furnace burden distribution and adjustment method according to claim 2, characterized in that: the track generation assembly comprises a crank and rocker mechanism which comprises a rack, a rocker, a connecting rod and a crank, wherein the drive motor controls the rocker to rotate so as to drive the crank to swing within a certain range, and a sliding groove is formed in the crank.

4. The blast furnace burden distribution and adjustment method according to claim 2, characterized in that: horn antenna unit bottom is equipped with signal transceiver, and horn antenna unit middle part is equipped with the universal joint, horn antenna unit upper portion is equipped with the passageway that slides, and horn antenna unit uses the universal joint to carry out the rotation of different ranges as the center, realizes the scanning of different orbits.

5. The blast furnace burden distribution and adjustment method according to claim 3, characterized in that: the top of the link mechanism is slidably arranged in a chute of the crank, and the bottom of the link mechanism is slidably arranged at the top of the horn antenna unit.

6. The blast furnace burden distribution and adjustment method according to claim 2, characterized in that: the upper part of the link mechanism is connected with a motor and a screw rod, and the link mechanism slides in a sliding groove of the crank under the driving of the motor and the screw rod.

7. The blast furnace burden distribution and adjustment method according to claim 1, characterized in that: the driving motor is a servo motor.

8. The blast furnace burden distribution and adjustment method according to claim 1, characterized in that: and in the second step, one interval period is 2 hours.

Technical Field

The invention relates to the technical field of blast furnace measuring equipment, in particular to a blast furnace distributing and regulating method.

Background

The blast furnace top is controlled by a bell-less device, the bell-less device distributes furnace burden into the furnace through a chute by a gear box, an ore-coke mode is generally adopted during distribution, namely coke and ore are respectively and alternately distributed into the furnace, the furnace burden forms a V-shaped burden surface shape with a platform on the furnace top after entering the furnace, generally speaking, the burden surface shape is regular and balanced, the burden surface height is basically uniform, but the burden surface shape can be deformed sometimes due to various reasons, such as deflection, sliding, pipelines, material collapse and the like, the burden surface balance is damaged, once the burden surface balance is damaged, the distribution of gas flow in the furnace can be changed, the smooth operation of blast furnace smelting is deteriorated, and one of effective means for processing the blast furnace abnormity is to restore the burden surface shape to the normal burden surface as soon as possible.

Currently, the level adjustment is generally performed by means of some monitoring information. Document 1 is a technique for adjusting the charge level by means of the temperature characteristics of the furnace crown risers, which first performs pattern recognition on the temperature curves of 4 risers, evaluates the temperature state of the risers, and indirectly evaluates the charge level condition, thereby achieving charge level adjustment, which is generally slow, and only when the temperature curves of 4 risers are very different, small adjustments of some charge distribution can be made, and even if the charge distribution effect is very limited, it is difficult to determine the specific deviation position.

Document 2 describes a method for adjusting a cloth material by using cross temperature measurement, where the cross temperature measurement can only measure a gas flow temperature about 2m above a material level, and there is hardly any definite correspondence between the gas flow temperature distribution and the material level condition, which is an experience-based material level adjustment mode, and only a large state can be evaluated, and the true condition of the cloth material is difficult to grasp.

Document 3 describes a method for estimating the charge level by using a mechanical scanning radar, which can only perform scanning on a specified furnace throat radius, and for abnormal furnace conditions and abnormal charge level, the measurement result is often greatly different from the actual condition.

Document 4 provides a technology for realizing charge level measurement by using a phased array radar, the phased array technology can realize measurement of the whole charge level, charge level measurement can be performed according to the measurement, and charge level adjustment can be performed in time, unfortunately, the technology is still in a research and development test stage, the technical feasibility is not a problem, but many problems still need to be solved in an engineering process, such as the problems of erosion, protection, dust adhesion and the like when a radar antenna extends into a furnace, careful research needs to be performed, and the technology still has a time when the technology is put into commercial operation.

As shown in documents 1, 2, 3 and 4, two difficulties are faced in timely repairing the balanced charge level, one of which is that the detection and evaluation are difficult. In actual blast furnace operation, a blast furnace is a closed black box, the burden surface distribution of the blast furnace is difficult to position, the distribution condition of the airflow at the furnace top can be evaluated only through the temperature distribution of a furnace top ascending pipe, cross temperature measurement or limited infrared information of the furnace top, the methods are time-consuming and labor-consuming, and once the burden surface is abnormal, the timely burden surface correction is difficult to realize by the methods. Secondly, the treatment is difficult, the bell-less cloth has the cloth modes of single ring, multiple rings, fixed points, fan shapes and the like theoretically, only one multi-ring cloth is used in daily operation, the single ring cloth is used a little, the fixed points and the fan shapes are almost not used, and the key or the positioning is difficult.

Even if the burden surface is deformed in the actual burden distribution process, the normal burden distribution is utilized in the adjustment mode, the burden distribution rhythm is accelerated, the burden surface of the burden distribution is self-corrected by the natural attributes of the burden distribution, the mode takes time, the time for the blast furnace to recover to the normal state is delayed, and for large disorder, the blast furnace generally needs more than 8 hours to realize the basic recovery of the blast furnace.

The above technical problems are urgent to be solved in the technical field.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a method for regulating the burden distribution of a blast furnace. The device and the method can realize the visualization of the key parameters of the blast furnace, accelerate the reduction efficiency between furnace burden and coal gas flow, and greatly accelerate the speed and the quality of blast furnace recovery.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a blast furnace burden distribution and adjustment method adopts a blast furnace burden distribution and adjustment system to monitor and adjust,

the blast furnace material distribution and adjustment system comprises a chute, a radar measuring component, a driving motor and a computer control unit, wherein the radar measuring component can rotate freely under the control of the driving motor, the computer control unit is respectively connected with the radar measuring component and the driving motor, and the radar measuring component is arranged at a vertebral platform on the upper part of a blast furnace body;

the blast furnace burden distribution and adjustment method comprises the following steps:

the method comprises the following steps: the blast furnace is alternately loaded into the furnace top through coke and ore to form the charge level distribution to be observed;

step two: setting a scanning track of a radar when the charge level is to be observed, scanning the track by using a radar measuring component every interval period under a normal material distribution state, and measuring the charge level shape of the blast furnace in the circumferential direction by using circles with different radiuses as tracks by using the radar in each scanning process;

step three: storing three-dimensional coordinates of the charge level obtained by scanning, and connecting the coordinates into a space curve as an observed charge level result;

step four: evaluating the characteristics of the charge level, determining abnormal deformation of the charge level when the non-uniform degree of the charge level is found to exceed a critical value, and determining the position and degree of the deformation of the charge level;

step five: distributing the charge level which is determined to be abnormally deformed in a concentrated manner at the collapse part by adopting a fan-shaped distribution mode in a fixed area, and filling the charge level for deformation, wherein the charge level for the deformation is filled up with the collapsed charge level on one hand, and the energy and reduction burden caused by the collapse are supplemented by coke on the other hand;

step six: and after the directional material distribution and adjustment is carried out, scanning in the circumferential direction is carried out by using a radar, the material level adjustment effect is evaluated by using the scanning result, if the material level deformation does not exceed a critical value, the material level correction is stopped, normal material distribution is carried out, otherwise, the material level correction is continued, until the material level is recovered to be normal, a normal material distribution mode is started, and monitoring and scanning are carried out by using a radar measuring component every interval period.

Further, radar measurement component includes track generation unit, link mechanism, horn antenna unit, track generation unit links to each other with link mechanism, link mechanism and horn antenna unit, track generation unit drives horn antenna unit's rotary motion through link mechanism.

Furthermore, the track generation assembly comprises a crank and rocker mechanism which comprises a rack, a rocker, a connecting rod and a crank, the driving motor controls the rocker to rotate so as to drive the crank to swing within a certain range, and a sliding groove is formed in the crank;

the bottom of the horn antenna unit is provided with a signal transceiver, the middle of the horn antenna unit is provided with a universal joint, the upper part of the horn antenna unit is provided with a sliding channel, and the horn antenna unit rotates in different amplitudes by taking the universal joint as a center to realize scanning of different tracks;

the top of the link mechanism is slidably arranged in a chute of the crank, and the bottom of the link mechanism is slidably arranged at the top of the horn antenna unit; the linkage mechanism transfers the trajectory of the crank to the feedhorn unit.

Further, the driving motor is a servo motor.

Furthermore, the upper part of the link mechanism is connected with a light motor and a screw rod, and the light motor and the screw rod slide in a sliding groove of the crank under the driving of the light motor and the screw rod.

Further, in the second step, an interval period is 2 hours.

This patent utilizes the mechanical scanning radar who sets for the orbit to realize the aassessment of the balanced shape of cloth, avoided utilizing furnace roof cross temperature measurement, the tedge temperature, ambiguity and randomness that furnace roof infrared image etc. brought, simultaneously on the basis of accurate aassessment charge level deformation, fan-shaped cloth function is launched to the accuracy, realize the accurate restoration of charge level shape, utilize this patent can mend the charge level in the shortest time, thereby can make follow-up cloth distribute with a normal mode, guarantee the normal of O/C ratio distribution, a normal O/C ratio distribution can guarantee that blast furnace gas flows normal distribution, blast furnace operation must save coke consumption, less furnace condition is undulant, promote energy utilization efficiency, reduce CO and compare the normal distribution of distribution, the utilization efficiency of less furnace condition, reduce CO₂And (5) discharging.

A preset track scanning mechanism is realized by utilizing a hinged four-bar mechanism; and then, scanning and positioning the specific charge level by using a mechanical scanning radar with a preset track. Finally, after the material level state is accurately evaluated, a material distribution mode such as fixed point mode, fan mode and the like is pertinently adopted, the adjustment of the material level of the blast furnace can be realized within 20-30min, the material level is adjusted to be in a balanced state, the distribution of the material level determines the distribution state of air flow in the furnace, the reliable and balanced air flow distribution can be realized only through the balanced and stable material level, the gas flow and the furnace burden are reasonably contacted, on one hand, the furnace burden is heated, on the other hand, the air flow evaluation and the furnace type management which are close to a material distribution regulator are researched, the visualization of key parameters of the blast furnace is realized, the reduction efficiency between the furnace burden and the gas flow is accelerated, and the recovery speed and the quality of the blast furnace are greatly accelerated.

Drawings

FIG. 1 is a schematic view of a blast furnace burden distribution and adjustment system in a blast furnace burden distribution and adjustment method according to the present invention;

FIG. 2 is a schematic structural diagram of a trajectory generation unit according to the present invention;

FIG. 3 is a schematic view of a connection structure of a radar measuring assembly, a link mechanism and a track generating unit according to the present invention;

FIG. 4 is a schematic diagram of a radar measuring assembly according to the present invention;

the reference numbers in the figures are as follows:

1-chute; 2-a radar measurement component; 21-a trajectory generation unit; 211-a frame; 212-rocker; 213-connecting rod; 214-crank; 22-a link mechanism; 23-a horn antenna element; 231-a glide path; 232-universal joint; 233-a signal transceiver; 24-gimbal support; 3-driving a motor; 4-a computer control unit; 5-blast furnace body; 6-material tank; 7-charge level.

Detailed Description

In order that the invention may be more clearly understood, the following detailed description of the embodiments of the invention is given with reference to the accompanying drawings and examples.

The invention discloses a blast furnace burden distribution and adjustment method, which adopts a blast furnace burden distribution and adjustment system for monitoring and adjustment, and the structure and the schematic diagram of the blast furnace burden distribution and adjustment system related to the blast furnace burden distribution and adjustment method are shown in figures 1, 2, 3 and 4.

The blast furnace material distribution and adjustment system comprises a chute 1, a radar measuring component 2, a driving motor 3 and a computer control unit 4, wherein the radar measuring component 2 can freely rotate under the control of the driving motor 3, the computer control unit 4 is respectively connected with the radar measuring component 2 and the driving motor 3, and the radar measuring component 2 is arranged at the vertebral platform at the upper part of a blast furnace body 5; the charging bucket 6 is arranged above the blast furnace body 5, and the chute 1 is arranged below the charging bucket 6;

the blast furnace burden distribution and adjustment method comprises the following steps:

the method comprises the following steps: the blast furnace is alternately loaded into the furnace top through coke and ore to form the distribution of the charge level 7 to be observed;

step two: setting a scanning track when a radar is required to observe the charge level 7, scanning the scan track by using the radar measuring component 2 every interval period under a normal material distribution state, and measuring the charge level shape of the blast furnace in the circumferential direction by using circles with different radiuses as tracks by using the radar measuring component 2 in each scanning process;

step three: storing three-dimensional coordinates of the charge level 7 obtained by scanning, and connecting the coordinates into a space curve as an observed charge level result;

step four: evaluating the characteristics of the burden surface, determining abnormal deformation of the burden surface 7 when the uneven degree of the burden surface 7 is found to exceed a critical value, and determining the position and degree of deformation of the burden surface 7;

step five: distributing the material surface which is determined to be abnormally deformed in a concentrated manner at the caving part by adopting a fan-shaped distribution mode in a fixed area, and filling the material surface to deform, so that the caving material surface 7 is filled up, and the energy and reduction burden caused by the caving are supplemented by coke;

step six: after directional material distribution and adjustment are carried out, scanning in the circumferential direction is carried out by the radar measuring component 2, the adjustment effect of the material level 7 is evaluated by the scanning result, if the deformation of the material level does not exceed a critical value, material level correction is stopped, normal material distribution is carried out, otherwise, material level correction is continued, a normal material distribution mode is started until the material level is recovered to be normal, and monitoring scanning is carried out by the radar measuring component 2 every interval period.

The radar measuring component 2 may adopt various technical combinations in the prior art, as long as the radar can control the rotation thereof, for example, the radar measuring component 2 may include a track generating unit 21, a linking mechanism 22, and a horn antenna unit 23, the track generating unit 21 is connected to the linking mechanism 22, the linking mechanism 22 is connected to the horn antenna unit 23, and the track generating unit 21 drives the horn antenna unit 23 to rotate through the linking mechanism.

The track generation assembly 21 may be a crank and rocker mechanism, and includes a frame 211, a rocker 212, a connecting rod 213, and a crank 214, a gear may be disposed at a position a in fig. 2 and connected to the driving motor 3, the driving motor 3 controls the rocker 212 to rotate, so as to drive the crank to swing within a certain range, and a sliding slot is disposed in the crank 214;

the bottom of the horn antenna unit 23 is provided with a signal transceiver 233, the middle of the horn antenna unit 23 is provided with a universal joint 232, the upper part of the horn antenna unit 23 is provided with a sliding channel 231, and the horn antenna unit 23 rotates in different amplitudes by taking the universal joint 232 as a center to realize scanning of different tracks; the universal joint 232 can be mounted at the universal joint support bracket 24 and the universal joint support bracket 24 can be placed at the radar passage at the upper cone of the blast furnace body 5.

The link mechanism 22 is a rod-shaped object, the top of the link mechanism 22 is slidably arranged in the sliding groove of the crank 214, and the bottom of the link mechanism 22 is slidably arranged at the top of the horn antenna unit 23; the link mechanism 22 transmits the trajectory of the crank 214 to the feedhorn unit 23.

The driving motor 3 may be a servo motor.

The upper part of the link mechanism 22 can be powered and slide in the sliding slot of the crank 214 under the driving of the powered device. The power device can be used in various ways known in the art, such as a light motor and a lead screw.

The period of one interval in the second step may be determined according to actual needs, and may be, for example, 2 hours.

The following is an example of a blast furnace burden distribution regulation method, which relates to some specific practice processes of the blast furnace burden distribution regulation method.

One is 3200m³In a blast furnace, the circumferential radius of the furnace top is 4.5m, and 2m of charge level deviation is assumed to be caused by abnormal furnace conditions.

1. The whole charge level is scanned circumferentially by a mechanical scanning radar.

1.1 scans every 0.5m for 5 times at the positions of 4.0, 3.5, 3.0, 2.5 and 2.0 to form 5 concentric circular curves.

1.2 connecting the five curves into a three-dimensional curved surface as an actual measurement curved surface.

2. Equally dividing the blast furnace in the circumferential direction by 8, and respectively calculating the unbalance coefficient alpha of each sector_jiAs follows:

such as alpha_jiIf (j 1, 2.. 8; i 1, 2.. 5) is within an acceptable range, the level is normal.

Here, the critical value δ is taken to be 2.0 m.

3. If α is_ji(j＝1，2，...8；i＝1，2，...5)＞δ(2.0m)

The position corresponding to j needs to be compensated.

aji＞8m	Compensating for 80 tons of coke
		8m＞aji＞5m	Compensate 50 tons of coke
5m＞aji＞3m	Compensate 30 tons of coke
		3m＞aji＞2m	Compensate 20 tons of coke

Compensation was performed with a fan cloth at j.

4. If α is_jiAnd (j is 1, 2, 8, i is 1, 2, 5) is less than 2.0m, and if the material level is normal, the material is transferred to normal material distribution.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.