CN111235332A

CN111235332A - Control method and control system for opening of blast furnace material flow valve

Info

Publication number: CN111235332A
Application number: CN202010043881.0A
Authority: CN
Inventors: 赵华涛; 张少波; 杜屏; 翟明; 朱华
Original assignee: Jiangsu Shagang Group Co Ltd; Zhangjiagang Hongchang Steel Plate Co Ltd; Jiangsu Shagang Iron and Steel Research Institute Co Ltd
Current assignee: Jiangsu Shagang Steel Co ltd; Jiangsu Shagang Group Co Ltd; Jiangsu Shagang Iron and Steel Research Institute Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-06-05
Anticipated expiration: 2040-01-15
Also published as: CN111235332B

Abstract

The invention provides a control method and a control system for the opening of a blast furnace material flow valve. The control method comprises the steps of generating a material flow valve opening setting instruction for the next material distribution stage; collecting the material tank number, the furnace burden type and the set material weight of the next material distribution stage; calling m historical material distribution stages with the same furnace burden type and material tank number as the next material distribution stage from a database, and constructing a functional relation among the actual material weight W, the actual material distribution time T and the opening K of the material flow valve; when any one of the material tank number and the set material weight of the next material distribution stage and the historical latest material distribution stage with the same material type is judged to be different, the actual material weight W of the next material distribution stage is collected_nAnd setting the distribution time T_nAnd calculating the opening K of the material flow valve at the next material distribution stage according to the function relation_n(ii) a Otherwise, calculating the opening error delta K of the material flow valve at the latest historical material distribution stage according to the functional relation₀And calculating to obtain the opening K of the material flow valve at the next material distribution stage_n＝K₀+ΔK₀。

Description

Control method and control system for opening of blast furnace material flow valve

Technical Field

The invention belongs to the technical field of smelting blast furnace control, and relates to a control method and a control system for the opening of a blast furnace flow valve.

Background

Blast furnace burden is generally referred to as: according to a material distribution system, the charging materials such as coke, ore and the like are distributed into the high-temperature and high-pressure furnace body from the charging bucket in a certain mode. Generally, the blast furnace burden distribution is performed in successive cycles, specifically taking the burden distribution of coke and ore as an example: firstly, pouring ores into a charging bucket through a feeding device, and opening a material flow valve at the lower end of the charging bucket at a preset opening degree to enable the ores to flow out of the charging bucket and fall onto an inclined chute, and then to slide downwards along the chute to the material surface in the furnace, so that the distribution of the ores is realized; then closing the material flow valve, finishing blanking at intervals, then pouring coke into the charging bucket through the feeding device, opening the material flow valve at the lower end of the charging bucket at a preset opening degree, so that the coke flows out of the charging bucket and falls onto an inclined chute, and further falls down to the material level in the furnace along the chute, thereby realizing the distribution of the coke; and closing the material flow valve, finishing the blanking at intervals, then repeating the material distribution of the ore, and repeating the process. Wherein, during each distribution, the chute rotates around the center line of the blast furnace to distribute the materials according to a preset distribution system.

The distribution system generally comprises parameters such as preset opening degree of the material flow valve, the number of rotation circles of the chute, the weight of the furnace charge and the like. Ideally, under the condition that the material flow valve is at the preset opening degree, the chute just distributes the furnace materials with the preset weight when the chute completes the preset number of rotation turns each time. Taking a multi-ring material distribution system as an example, the multi-ring material distribution system generally comprises parameters such as a preset opening K of a material flow valve, the number of rotation turns N of a chute, the weight M of furnace materials and the like, under an ideal condition, in the material distribution process, the material flow valve is opened at the preset opening K, and when the chute rotates around the center line of a blast furnace for the number of turns N, the material distribution of the furnace materials with the weight M is completed. However, in the actual production of blast furnaces, it is almost impossible to achieve the ideal state, either the preset weight is already distributed when the chute does not rotate (i.e. the chute is idle at last), or the distribution weight does not reach the preset weight when the chute stops rotating.

The regulation and control method of the preset opening of the material flow valve in the existing material distribution system is roughly divided into the following two methods.

Firstly, an operator obtains the actual material distribution time of the last time by observing and recording the opening time and the closing time of a material flow valve in the last time of material distribution, and when the actual material distribution time is longer than the theoretical material distribution time according to a material distribution system, the operator increases the preset opening of the material flow valve in the next time of material distribution; and when the actual material distribution time length is less than the theoretical material distribution time length, the operator reduces the preset opening of the material flow valve in the next material distribution. In the regulation and control method, the regulation amplitude of the preset opening of the material flow valve is adjusted blindly only by the experience of an operator every time, so that the error is large, and the fluctuation of the furnace condition is easily caused; in addition, for two charging pots at the top of the blast furnace, in actual production, the situation that the charging materials of the two charging pots are exchanged often exists, and when the same charging material is distributed through different charging pots, even if the same opening degree of the material flow valve is adopted, the material flow speed of the charging material is greatly different, so that the regulation and control method cannot be applied to the situation.

Secondly, obtaining a relation matrix table of furnace burden, furnace burden weight, chute rotating circles, material flow valve opening degree and the like through a large number of tests before the blast furnace is opened, and inquiring the relation matrix table to obtain the material flow valve opening degree when the material is distributed every time after the blast furnace is opened. However, on one hand, the relation matrix table is static data, when a distribution system has a large deviation from each parameter of the relation matrix table, effective opening data of the material flow valve cannot be obtained according to the relation matrix table, on the other hand, as the service time increases, the abrasion degree of the material tank influences the material flow speed, and the static relation matrix table cannot be matched with the opening control requirements of the material flow valve of the material tank at different service times, so that the error is large, and the furnace condition fluctuation is easily caused.

Disclosure of Invention

The invention aims to provide a control method and a control system for the opening of a blast furnace material flow valve, which solve the problems of large adjustment error and poor applicability of the opening of the material flow valve in the prior art.

In order to achieve one of the above objects, an embodiment of the present invention provides a method for controlling an opening degree of a blast furnace burden flow valve, including,

establishing a database, wherein the database comprises the collected material tank numbers, the furnace burden types, the set material distribution time, the actual material distribution time, the set material weight, the actual material weight and the opening degree of a material flow valve of each material distribution stage in the production history;

generating a material flow valve opening setting instruction for the next material distribution stage;

collecting the material tank number, the furnace burden type and the set material weight of the next material distribution stage;

calling m historical material distribution stages with the same furnace burden type and the same material tank number as the next material distribution stage from the database, wherein m is a natural number larger than 1, and constructing a functional relation among the actual material weight W, the actual material distribution time T and the opening K of the material flow valve;

inquiring a historical latest material distribution stage with the same furnace charge type as the next material distribution stage in the database, and judging whether the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight;

when the judgment result is negative, collecting the actual material weight W of the next material distribution stage_nAnd setting the distribution time T_nAnd calculating the opening K of the material flow valve at the next material distribution stage according to the function relation_n；

When the judgment result is yes, the cloth time T is set according to the historical latest cloth stage₀Actual distribution time T₀', set the material weight W₀Actual material weight W₀' opening K of material flow valve₀And calculating the opening error delta K of the material flow valve at the historical latest material distribution stage according to the functional relation₀And calculating to obtain the opening K of the material flow valve at the next material distribution stage_n＝K₀+ΔK₀。

As a further improvement of an embodiment of the present invention, the function relationship is W/T ═ a × K + b, where: according to the actual material weight W of m historical material distribution stages_iActual distribution time T_iOpening K of material mixing valve_iWherein i is 1.. multidot.m, calculated

And obtaining

Wherein Cov (K, W/T) is a sample covariance matrix of m historical material distribution stages, Var (K) is a variance of the m historical material distribution stages,

and

is the average of m historical distribution stages.

As a further improvement of an embodiment of the present invention, when the determination result is negative, the opening K of the material flow valve in the next material distribution stage is calculated_n＝(W_n/T_n-b)/a。

As a further improvement of an embodiment of the present invention, when the judgment result is yes, the calculation is made

Calculating to obtain the opening K of the material flow valve at the next material distribution stage_n＝K₀+ΔK₀。

As a further improvement of an embodiment of the present invention, in the step "calling m historical burden distribution stages having the same burden type and the same burden pot number as the next burden distribution stage in the database", calling m historical burden distribution stages having the same burden type and the same burden pot number as the next burden distribution stage in the database based on the principle that time is from near to far; wherein m is equal to or greater than 100.

As a further improvement of the embodiment of the present invention, each time the charging command for the next distribution stage is generated, the opening setting command of the material flow valve for the next distribution stage is generated.

As a further improvement of one embodiment of the invention, the method comprises the steps of collecting opening action signals and closing action signals of a material flow valve, and obtaining actual material distribution time, material tank number and furnace burden type of each material distribution stage;

collecting material distribution regulation and control parameters in a material distribution system adopted by each material distribution stage to obtain set material distribution time, set material weight and opening degree of a material flow valve of each material distribution stage;

and acquiring the actual material weight of each material distribution stage by a material tank weight measuring instrument.

In order to achieve one of the above objects, an embodiment of the present invention provides a system for controlling an opening of a blast furnace flow valve, which is characterized by comprising a data acquisition module, a data storage module, an instruction generation module, a data processing module and a control module;

the data acquisition module is used for: collecting the material tank number, the furnace burden type, the set material distribution time, the actual material distribution time, the set material weight, the actual material weight and the opening degree of a material flow valve of each material distribution stage in the production history; collecting the number of a charging bucket, the type of furnace burden and the set material weight of the next material distribution stage;

the data storage module is used for: constructing a database comprising each material distribution stage in the production history;

the instruction generation module is configured to: generating a material flow valve opening setting instruction for the next material distribution stage;

the data processing module is used for: calling m historical material distribution stages with the same furnace burden type and the same material tank number as the next material distribution stage from the database, wherein m is a natural number larger than 1, and constructing a functional relation among the actual material weight W, the actual material distribution time T and the opening K of the material flow valve; querying a historical recent material distribution stage with the same furnace charge type as the next material distribution stage in the database, and judging whether the next material distribution stage and the historical recent material distribution stage have the same material tank number and set material weight;

the data acquisition module is further configured to: when the material tank number and the set material weight of the next material distribution stage and the historical latest material distribution stage are different, collecting the actual material weight W of the next material distribution stage_nAnd setting the distribution time T_n；

The data processing module is further configured to: based on the actual material weight W_nAnd the set distribution time T_nAnd calculating the opening K of the material flow valve according to the function relation_n(ii) a And when the material tank numbers and the set material weights of the next material distribution stage and the historical latest material distribution stage are the same, distributing time T is set according to the historical latest material distribution stage₀Actual distribution time T₀', set the material weight W₀Actual material weight W₀' opening K of material flow valve₀And calculating the opening error delta K of the material flow valve at the historical latest material distribution stage according to the functional relation₀Calculating the opening K of the material flow valve_n＝K₀+ΔK₀；

The control module is used for: controlling the material flow valve at the next material distribution stage to open K_nAnd (4) opening.

And obtaining

and

is the average of m historical distribution stages.

As a further improvement of an embodiment of the present invention, when any one of the bucket numbers and the set weights of the next material distributing stage and the historical latest material distributing stage is different, the opening K of the material flow valve is calculated_n＝(W_n/T_n-b)/a；

When the material tank numbers and the set material weights of the next material distribution stage and the historical latest material distribution stage are the same, calculating to obtain

Calculating to obtain the opening K of the material flow valve_n＝K₀+ΔK₀。

Compared with the prior art, the invention has the beneficial effects that: establishing a functional relation based on the same material tank number and the same type of furnace burden, and dividing the functional relation into two different situations according to the difference between the next material distribution stage and the historical nearest material distribution stage for utilization, wherein in one situation, when the difference between the next material distribution stage and the historical nearest material distribution stage is smaller, the functional relation is utilized to carry out error correction on the opening degree of the material flow valve in the historical nearest material distribution stage, so that the opening degree of the material flow valve can be accurately obtained for controlling the material flow valve in the next material distribution stage to realize accurate regulation and further forward movement of the blast furnace, in the other situation, when the difference between the next material distribution stage and the historical nearest material distribution stage is larger, the data in the next material distribution stage is substituted into the historical functional relation to obtain more accurate opening degree of the material flow valve for controlling the material flow valve in the next material distribution stage, the condition fluctuation of the blast furnace caused by blind setting of the opening of the material flow valve according to the experience of an operator is avoided.

Drawings

FIG. 1 is a flowchart of a method for controlling the opening of a blast furnace flow valve according to an embodiment of the present invention;

FIG. 2 is a block diagram of the control method and control system of one embodiment of the present invention adapted to a blast furnace top installation;

FIG. 3 is a block diagram of a control system for blast furnace burden flow valve opening in accordance with an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a control method, which is specifically applicable to control of an opening of a material flow valve at a top of a blast furnace, so as to regulate and control a material speed of a material flow discharging tank of the furnace in a material distribution stage, thereby further realizing an ideal situation that an actual material distribution time is close to a set value, and facilitating smooth control of the blast furnace. The individual steps of a preferred embodiment of the control method will now be described in connection with the blast furnace top installation shown in fig. 2.

The method comprises the following steps: and constructing a database.

The database comprises the collected material distribution data of the material tank number, the furnace burden type, the set material distribution time, the actual material distribution time, the set material weight, the actual material weight, the opening degree of the material flow valve and the like of each material distribution stage in the production history.

The continuous production of the blast furnace has a plurality of material distribution stages, and a database comprising the material distribution stages in the production history can be constructed based on the material distribution data of each material distribution stage. It is understood that the database has the collected cloth data of each cloth stage. In a preferred embodiment, the database is constructed as the continuous production of the blast furnace continues, for example, the burden distribution data of a burden distribution stage can be collected every time the blast furnace performs the burden distribution stage, and the burden distribution data of the burden distribution stage is stored in the database.

Specifically, this step includes the substeps of: and acquiring an opening action signal and a closing action signal of the material flow valve, and acquiring actual material distribution time, a material tank number and a furnace burden type of each material distribution stage according to the occurrence time of the opening action signal and the occurrence time of the closing action signal.

With reference to fig. 2, the top of the blast furnace is provided with two charging pots, namely a charging pot No. 1 and a charging pot No. 2; a material flow valve is arranged at the bottom of each charging bucket, namely a material flow valve 6 is arranged at the bottom of the No. 1 charging bucket 2, and a material flow valve 7 is arranged at the bottom of the No. 2 charging bucket 3; and a feeding device 1 is arranged above the two charging buckets. The material flow valve 6, the material flow valve 7 and the electric control unit of the feeding device 1 are all integrated on a programmable logic controller 9 at the top of the blast furnace, and complete respective actions under the control of the programmable logic controller 9.

In this embodiment, the opening action signal of the material flow valve 6 is collected to determine that the material distribution stage enters the material distribution stage, the closing action signal of the material flow valve 6 is collected to determine that the material distribution stage ends, and the actual material distribution time of the material distribution stage corresponding to the opening action signal of the material flow valve 6 is obtained based on the time difference between the occurrence time of the closing action signal and the occurrence time of the opening action signal. Preferably, when the time difference is smaller than a preset theoretical time, the obtained actual material distributing time is valid data, that is, when an opening action signal of the material flow valve 6 is acquired and a closing action signal of the material flow valve 6 is acquired within the preset theoretical time (preferably within 5 minutes), the actual material distributing time of the material distributing stage corresponding to the opening action signal of the material flow valve 6 is obtained based on the time difference between the occurrence times of the closing action signal and the opening action signal.

Moreover, according to the matching relationship between the material flow valve 6 and the material tank No. 1 2, the material tank No. 1 at the material distribution stage corresponding to the opening action signal of the material flow valve 6 is obtained; correspondingly, the types of the furnace burden corresponding to the No. 1 charging bucket 2 are further collected and obtained.

Similarly, an opening action signal of the material flow valve 7 is collected to determine that the material distribution stage enters the material distribution stage, a closing action signal of the material flow valve 7 is collected to determine that the material distribution stage is finished, and the actual material distribution time of the material distribution stage corresponding to the opening action signal of the material flow valve 7 is obtained based on the time difference between the occurrence moment of the closing action signal and the occurrence moment of the opening action signal. Preferably, when the time difference is smaller than a preset theoretical time, the obtained actual material distributing time is valid data, that is, when an opening action signal of the material flow valve 7 is acquired and a closing action signal of the material flow valve 7 is acquired within a certain time interval (preferably within 5 minutes), the actual material distributing time of the material distributing stage corresponding to the opening action signal of the material flow valve 7 is obtained based on the time difference between the occurrence moments of the closing action signal and the opening action signal.

Moreover, according to the matching relationship between the material flow valve 7 and the material tank No. 2 3, the material tank number of the material distribution stage corresponding to the opening action signal of the material flow valve 7 is obtained, namely the material tank No. 2; correspondingly, the furnace burden type corresponding to the material tank 3 No. 2 is further collected and obtained.

The charging material type is ore or coke, and the charging material type corresponding to each charging bucket can be preset by the programmable logic controller 10.

This step further comprises the sub-steps of: and acquiring the actual material weight of each material distribution stage by a material tank weight measuring instrument.

With reference to fig. 2, the two charging pots are respectively equipped with a weight meter (or so-called weighing scale) for measuring the weight of the charge inside the charging pot, namely: no. 1 charging bucket 2 disposes No. 1 weight appearance 4, and this No. 1 weight appearance 4 can be used to measure the material weight in No. 1 charging bucket 2, and No. 1 weight appearance 4 electricity is connected in programmable logic controller 9 to the material weight data that will sense it conveys to programmable logic controller 9, from this, through the matching relation of No. 1 weight appearance 4 and No. 1 charging bucket 2, when confirming to enter the cloth stage based on the opening action signal of the material flow valve 6 that No. 1 charging bucket 2 corresponds, can obtain the actual material weight in this cloth stage; no. 2 material jar 3 disposes No. 2 weight appearance 5, this No. 2 weight appearance 5 can be used to measure the material weight in No. 2 material jar 3, No. 2 weight appearance 5 is connected in programmable logic controller 9, with the material weight data transmission to programmable logic controller 9 of its sensing, therefore, through No. 2 weight appearance 5 and No. 2 material jar 3's matching relation, when opening the actuating signal and confirming when entering the cloth stage based on the material flow valve 7 that No. 2 material jar 3 corresponds, can acquire the actual material weight in this cloth stage.

This step further comprises the sub-steps of: and collecting the material distribution regulation and control parameters in the material distribution system adopted in each material distribution stage to obtain the set material distribution time, the set material weight and the opening degree of the material flow valve in each material distribution stage.

Each material distribution stage of the blast furnace is carried out according to a preset material distribution system, and the material distribution system comprises a plurality of material distribution regulation and control parameters. In the substep, the set distribution time, the set material weight and the opening degree of the material flow valve in the distribution stage can be obtained by collecting the distribution regulation and control parameters in the distribution system adopted in the distribution stage. The set material distribution time, the set material weight and the opening degree of the material flow valve can be directly obtained from material distribution regulation parameters of a material distribution system respectively, and can also be obtained by derivation from the material distribution regulation parameters of the material distribution system.

For example, the opening of the material flow valve and the set material weight can be direct material distribution regulation parameters in a material distribution system respectively; the set material distribution time can be obtained by deducing a plurality of material distribution regulation and control parameters in a material distribution system. In a preferred embodiment, the material distribution system is a multi-ring material distribution system, the multi-ring material distribution system comprises the opening degree of a material flow valve, the set material weight, the number of rotation turns of a chute and the single rotation time, and the set material distribution time is the product of the number of rotation turns of the chute and the single rotation time, as shown in fig. 2, the top of the blast furnace is provided with the chute 8, an electric control unit of the chute 8 is integrated in a programmable logic controller 9 at the top of the blast furnace, the chute 8 rotates for 360 degrees for one turn around the center line of the blast furnace at a preset inclination angle under the control of the programmable logic controller 9, and the time for one turn of the chute 8 is the single rotation time. Of course, in a variation embodiment, the material distribution system may also be any one of spiral material distribution, fixed point material distribution, and fan-shaped material distribution, but any one of the material distribution systems may obtain the set material distribution time, the set material weight, and the opening degree of the material flow valve directly or by derivation through material distribution control parameters.

It should be noted that, unless necessary, each sub-step in the step is not limited by a specific order, and the implementation order of each sub-step is not limited by the sequential description of the sub-steps in the present application.

The method comprises the following steps: and generating a material flow valve opening setting instruction aiming at the next material distribution stage.

In the step, before entering the next material distribution stage, that is, before the opening action signal of the material flow valve in the next material distribution stage is acquired, a material flow valve opening setting instruction is generated, so that the opening of the material flow valve used in the next material distribution stage is acquired based on the subsequent steps, and therefore, the opening of the material flow valve in each material distribution stage in production is acquired in real time based on the control method, the control of the material flow rate at the top of the blast furnace is facilitated, and the smooth operation of the blast furnace is further stabilized.

In a preferred embodiment, the opening setting instruction of the material flow valves is generated during the intermission between two adjacent material distribution stages, that is, when all the material flow valves (the material flow valve 6 and the material flow valve 7) on the furnace top are in a closed state. It can also be said that the material flow valve opening setting command is generated every time when a closing operation signal of one of the material flow valve 6 and the material flow valve 7 is acquired and an opening operation signal of the other of the material flow valve 6 and the material flow valve 7 is not acquired.

Further, in actual production, before the material flow valve is opened to enter the material distribution stage, a material loading instruction is generated, the feeding device 1 is controlled to load the material into the material tank by taking the set material weight in the material distribution system as a standard, and after the material loading is finished, the material flow valve is opened again to enter the material distribution stage. Preferably, the material flow valve opening setting command is generated every time a charging command for the next material distribution stage is generated.

The method comprises the following steps: and collecting the material tank number, the furnace burden type and the set material weight of the next material distribution stage.

In this step, the specific collection mode of the material tank number, the type of the burden and the set material weight in the next material distribution stage is the same as the specific collection mode of the material tank number, the type of the burden and the set material weight in each material distribution stage in the step of establishing the database, and details are not repeated.

The method comprises the following steps: and calling m historical material distribution stages with the same furnace burden type and the same material tank number as the next material distribution stage from the database, wherein m is a natural number greater than 1, and constructing a functional relation among the actual material weight W, the actual material distribution time T and the opening K of the material flow valve.

In the step, m historical material distribution stages are called from the database according to the types of the furnace materials and the numbers of the material tanks of the next material distribution stage, the types of the furnace materials of the m historical material distribution stages are the same as the types of the furnace materials of the next material distribution stage, and the numbers of the material tanks of the m historical material distribution stages are the same as the numbers of the material tanks of the next material distribution stage.

And constructing a functional relation of the actual material weight W, the actual material distribution time T and the opening K of the material flow valve based on the obtained m historical material distribution stages, namely constructing the functional relation based on the obtained actual material weight W, the actual material distribution time T and the opening K of the material flow valve of the m historical material distribution stages.

Preferably, the actual material weight W is calculated according to m historical material distribution stages_iActual distribution time T_iOpening K of material mixing valve_iWhere i is 1, …, m, the coefficients are calculated

Wherein Cov (K, W/T) is a sample covariance matrix of m historical material distribution stages, and Var (K) is a variance of m historical material distribution stages.

And further calculating the coefficient based on the calculated coefficient b

Wherein, in the step (A),

to know

Is the average of m historical distribution stages.

The function relation of the actual material weight W, the actual material distribution time T and the opening K of the material flow valve obtained in this way is W/T ═ a × K + b.

As mentioned above, the charge type of the blast furnace includes coke and ore, and the charging bucket number includes charging bucket No. 1, charging bucket No. 2, and charging bucket No. 2, so in practical implementation, the charge type and charging bucket No. of the next material distribution stage have the following four conditions: in the 1 st type, coke is in the No. 1 charging bucket 2, namely, the coke is distributed into the blast furnace body from the No. 1 charging bucket 2 in the next material distribution stage; the 2 nd type, coke, material tank 3 No. 2, that is, the next material distribution stage is to distribute the coke from the material tank 3 No. 2 into the blast furnace body; 3, ore, No. 1 charging bucket 2, namely, the next material distribution stage is to distribute the ore into the blast furnace body from the No. 1 charging bucket 2; category 4, ore, feed tank No. 2, i.e. the next distribution stage is to distribute ore from feed tank No. 2 3 into the blast furnace body.

Correspondingly, the functional relationship W/T ═ a × K + b based on the same charge type and charge bucket number structure also has four different sets of coefficients a corresponding to the four cases described above_jAnd b_jWhere j is 1, 2, 3, 4, that is, based on the above four cases, the corresponding functional relationship W/T is a_j×K+b_jJ is 1, 2, 3, 4. For example, if the charging type of the next material distribution stage is ore and the charging bucket number is 1 charging bucket 2, then m historical material distribution stages with the charging type of ore and the charging bucket number of 1 charging bucket 2 are extracted from the database, and the actual material weight W of the m historical material distribution stages is based on_iActual distribution time T_iOpening K of material mixing valve_iWherein i is 1.. multidot.m, the coefficients are calculated

And further calculating to obtain coefficients

From this, the function relationship is obtained as W/T ═ a₃×K+b₃。

Further preferably, when m historical material distribution stages are called from the database, the m historical material distribution stages are called from the database based on the principle that time goes from near to far, wherein m is preferably greater than or equal to 100. Therefore, the historical material distribution stage with the same burden type and the same material tank number and similar to the current time is called to construct the functional relation, so that the current material tank condition can be more approximate, for example, the wear degree of the material tank is closer, and the opening K of the material flow valve is obtained based on the functional relation_nIs more accurate.

The method comprises the following steps: and inquiring a historical latest material distribution stage with the same furnace burden type as the next material distribution stage in the database, and judging whether the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight.

In this step, the historical latest burden distribution stage is determined based on the same burden type as the next burden distribution stage and the latest time, and does not mean a burden distribution stage which is only the latest time in the database. For example, if the charge type of the next burden distribution stage is ore, and in normal production of the blast furnace, according to a conventional operation manner of alternately distributing ore and coke at intervals, the charge type of the nearest burden distribution stage in the database is coke, the burden distribution stage of the coke is not the historical nearest burden distribution stage in this step, and the burden distribution stage of the nearest ore before the burden distribution stage of the coke is the historical nearest burden distribution stage.

In this step, it is determined whether the next material distribution stage and the historical closest material distribution stage have the same material tank number and set material weight, that is, whether the material tank number of the next material distribution stage is the same as the material tank number of the historical closest material distribution stage, and whether the set material weight of the next material distribution stage is the same as the set material weight of the historical closest material distribution stage.

If the judging result is yes, namely the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight, the next material distribution stage and the historical latest material distribution stage have the same material tank number, furnace burden type and set material weight, namely the next material distribution stage is not adjusted greatly in terms of material distribution compared with the historical latest material distribution stage, and correspondingly, the opening of the material flow valve is adjusted finely and calibrated according to the historical latest material distribution stage and the functional relation in the subsequent steps. If the result of the determination is negative, that is, the next material distribution stage and the historical latest material distribution stage have at least different material tank numbers or at least different set material weights, even if the material tank numbers and the set material weights are different, the adjustment of the material distribution range of the next material distribution stage is larger than that of the historical latest material distribution stage, and at this time, in the subsequent steps, the opening degree of the material flow valve needs to be accurately determined based on the functional relationship.

The method comprises the following steps: when the judgment result is negative, collecting the actual material weight W of the next material distribution stage_nAnd setting the distribution time T_nAnd calculating the opening K of the material flow valve at the next material distribution stage according to the function relation_n。

In this step, when the result of the determination in the previous step is negative, that is, the next material distribution stage and the latest material distribution stage in history have at least different bucket numbers or at least different set material weights, even if the bucket numbers and the set material weights are different, in this case, the actual material weight W of the next material distribution stage is collected_nAnd setting the distribution time T_nThe actual material weight W_nAnd setting the distribution time T_nThe concrete acquisition mode and the actual material weight of each material distribution stage in the database building step and the material distribution time settingThe specific collection mode is the same, and is not described in detail.

The collected actual material weight W_nAnd setting the distribution time T_nSubstituting the function relation W/T into a multiplied by K + b to obtain the opening K of the material flow valve_n＝(W_n/T_nB)/a, opening K of the material flow valve_nCan be applied to the next material distribution stage, namely by outputting the opening K of the material flow valve_nTo control the material flow valve of the next material distribution stage to open K_nAnd opening to further realize the material distribution of the next material distribution stage.

It can be understood that, in the functional relationship used in this step, the coefficients a and b are both: based on m historical material distribution stages with the same material tank number and the same furnace charge type as the next material distribution stage, calculating the obtained coefficient a_jAnd b_j. For example, the type of the charge in the next material distribution stage is ore and the number of the charge tank is 1 charge tank 2, and is 3 of the four cases described above, correspondingly, in this step, the actual weight W of the collected material is measured_nAnd setting the distribution time T_nSubstituting the functional relation W/T ═ a₃×K+b₃The opening K of the material flow valve at the next material distribution stage can be obtained through calculation_n＝(W_n/T_n-b₃)/a₃。

The method comprises the following steps: when the judgment result is yes, the cloth time T is set according to the historical latest cloth stage₀Actual distribution time T₀', set the material weight W₀Actual material weight W₀' opening K of material flow valve₀And calculating the opening error delta K of the material flow valve at the historical latest material distribution stage according to the functional relation₀And calculating to obtain the opening K of the material flow valve at the next material distribution stage_n＝K₀+ΔK₀。

The step corresponds to the condition that when the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight, the material distribution time T is set according to the historical latest material distribution stage₀Actual distribution time T₀', set the material weight W₀And actual material weight W₀', and calculating the flow valve opening error delta K of the historical latest distribution stage according to the functional relation W/T-a multiplied by K + b₀。

Preferably, will be based on a set weight W₀Actual material weight W₀'calculated Material weight error W'₀-W₀And based on a set distribution time T₀Actual distribution time T₀'calculated cloth time error T'₀-T₀Respectively substituting the functions W/T into a multiplied by K + b to calculate the opening error of the material flow valve

Further calculating the opening K of the material flow valve_n＝K₀+ΔK₀. The opening K of the material flow valve_nCan be applied to the next material distribution stage, namely by outputting the opening K of the material flow valve_nTo control the material flow valve of the next material distribution stage to open K_nAnd opening to further realize the material distribution of the next material distribution stage.

It can be understood that, in the functional relationship used in this step, the coefficients a and b are both: based on m historical material distribution stages with the same material tank number and the same furnace charge type as the next material distribution stage, calculating the obtained coefficient a_jAnd b_j. For example, the type of the charge in the next material distribution stage is ore and the number of the charging bucket is 1 charging bucket 2, and is the 3 rd of the four cases described above, and correspondingly, in this step, the calculated material weight error W'₀-W₀And a cloth time error T'₀-T₀Substituting the functional relation W/T ═ a₃×K+b₃The opening degree of the material flow valve at the next material distribution stage can be obtained through calculation

Then the opening K of the material flow valve at the next material distribution stage can be further calculated_n。

In summary, compared with the prior art, the control method of the embodiment has the following beneficial effects: establishing a functional relation based on the same material tank number and the same type of furnace burden, and dividing the functional relation into two different situations according to the difference between the next material distribution stage and the historical nearest material distribution stage for utilization, wherein in one situation, when the difference between the next material distribution stage and the historical nearest material distribution stage is smaller, the functional relation is utilized to carry out error correction on the opening degree of the material flow valve in the historical nearest material distribution stage, so that the opening degree of the material flow valve can be accurately obtained for controlling the material flow valve in the next material distribution stage to realize accurate regulation and further forward movement of the blast furnace, in the other situation, when the difference between the next material distribution stage and the historical nearest material distribution stage is larger, the data in the next material distribution stage is substituted into the historical functional relation to obtain more accurate opening degree of the material flow valve for controlling the material flow valve in the next material distribution stage, the condition fluctuation of the blast furnace caused by blind setting of the opening of the material flow valve according to the experience of an operator is avoided.

Further, referring to fig. 3, the invention further provides a blast furnace burden distribution condition evaluation system, which includes a data acquisition module 100, a data storage module 200, an instruction generation module 300, a data processing module 400 and a regulation and control module 500.

The data acquisition module 100 is used for acquiring material distribution data such as the number of a material tank, the type of furnace burden, set material distribution time, actual material distribution time, set material weight, actual material weight, opening degree of a material flow valve and the like in each material distribution stage.

The data input end of the data storage module 200 is connected to the data output end of the data acquisition module 100, and is configured to: the material distribution data of each material distribution stage is received from the data acquisition module 100 and stored to construct a database. It can be understood that the database includes material distribution data, such as the number of the material tank, the type of the burden, the set material distribution time, the actual material distribution time, the set material weight, the actual material weight, and the opening degree of the material flow valve, of each material distribution stage in the production history collected by the data collection module 100.

In a preferred embodiment, the database is constructed as the continuous production of the blast furnace continues, for example, each time the blast furnace performs a material distribution stage, the data acquisition module 100 may acquire material distribution data of the material distribution stage, and the data storage module 200 stores the material distribution data of the material distribution stage into the database.

The data acquisition module 100 is configured to: and acquiring an opening action signal and a closing action signal of the material flow valve, and acquiring actual material distribution time, a material tank number and a furnace burden type of each material distribution stage according to the occurrence time of the opening action signal and the occurrence time of the closing action signal.

In this embodiment, the data acquisition module 100 acquires an opening action signal of the material flow valve 6, so as to determine that the material distribution stage enters, the data acquisition module 100 acquires a closing action signal of the material flow valve 6, so as to determine that the material distribution stage ends, and based on a time difference between an occurrence time of the closing action signal and an occurrence time of the opening action signal, the data acquisition module 100 acquires actual material distribution time of the material distribution stage corresponding to the opening action signal of the material flow valve 6. Preferably, when the time difference is smaller than a preset theoretical time, the obtained actual material distribution time is valid data, that is, when the data acquisition module 100 acquires an opening action signal of the material flow valve 6 and acquires a closing action signal of the material flow valve 6 within the preset theoretical time (preferably within 5 minutes), based on the time difference between the occurrence moments of the closing action signal and the opening action signal, the data acquisition module 100 obtains the actual material distribution time of the material distribution stage corresponding to the opening action signal of the material flow valve 6.

Moreover, according to the matching relationship between the material flow valve 6 and the material tank No. 1 2, the data acquisition module 100 obtains the material tank number of the material distribution stage corresponding to the opening action signal of the material flow valve 6, namely the material tank No. 1; correspondingly, the data acquisition module 100 further acquires and obtains the type of the burden corresponding to the No. 1 charging bucket 2.

Similarly, the data acquisition module 100 acquires an opening action signal of the material flow valve 7 to determine that the material distribution stage enters, the data acquisition module 100 acquires a closing action signal of the material flow valve 7 to determine that the material distribution stage ends, and based on a time difference between an occurrence time of the closing action signal and an occurrence time of the opening action signal, the data acquisition module 100 acquires actual material distribution time of the material distribution stage corresponding to the opening action signal of the material flow valve 7. Preferably, when the time difference is smaller than a preset theoretical time, the obtained actual material distribution time is valid data, that is, when the data acquisition module 100 acquires an opening action signal of the material flow valve 7 and acquires a closing action signal of the material flow valve 7 within a certain time interval (preferably within 5 minutes), based on the time difference between the occurrence moments of the closing action signal and the opening action signal, the data acquisition module 100 obtains the actual material distribution time of the material distribution stage corresponding to the opening action signal of the material flow valve 7.

Moreover, according to the matching relationship between the material flow valve 7 and the material tank No. 2 3, the data acquisition module 100 obtains the material tank number of the material distribution stage corresponding to the opening action signal of the material flow valve 7, namely, the material tank No. 2; correspondingly, the data acquisition module 100 further acquires and obtains the type of the burden corresponding to the material tank No. 2 3.

The data acquisition module 100 is further configured to: and acquiring the actual material weight of each material distribution stage by a material tank weight measuring instrument.

With reference to fig. 2, the two charging pots are respectively equipped with a weight meter (or so-called weighing scale) for measuring the weight of the charge inside the charging pot, namely: no. 1 charging bucket 2 is configured with No. 1 weight meter 4, and this No. 1 weight meter 4 can be used to measure the material weight in No. 1 charging bucket 2, and No. 1 weight meter 4 is connected in programmable logic controller 9 to the material weight data that it sensed convey to programmable logic controller 9, so, through the matching relation of No. 1 weight meter 4 and No. 1 charging bucket 2, when determining to enter the material distribution stage based on the opening action signal of material flow valve 6 that No. 1 charging bucket 2 corresponds, data acquisition module 100 can obtain the actual material weight in this material distribution stage; no. 2 material jar 3 disposes No. 2 weight appearance 5, this No. 2 weight appearance 5 can be used to measure the material weight in No. 2 material jar 3, No. 2 weight appearance 5 electricity is connected in programmable logic controller 9, with the material weight data transmission to programmable logic controller 9 that it senses, therefore, through No. 2 weight appearance 5 and No. 2 material jar 3's matching relation, when opening the actuating signal and confirming entering the cloth stage based on the material flow valve 7 that No. 2 material jar 3 corresponds, data acquisition module 100 can acquire the actual material weight in this cloth stage.

The data acquisition module 100 is further configured to: and collecting the material distribution regulation and control parameters in the material distribution system adopted in each material distribution stage to obtain the set material distribution time, the set material weight and the opening degree of the material flow valve in each material distribution stage.

Each material distribution stage of the blast furnace is carried out according to a preset material distribution system, and the material distribution system comprises a plurality of material distribution regulation and control parameters. The data acquisition module 100 can acquire the set material distribution time, the set material weight and the opening of the material flow valve in the material distribution stage by acquiring the material distribution regulation and control parameters in the material distribution system adopted in the material distribution stage. The set material distribution time, the set material weight and the opening degree of the material flow valve can be directly obtained from material distribution regulation parameters of a material distribution system respectively, and can also be obtained by derivation from the material distribution regulation parameters of the material distribution system.

Preferably, the data input end of the data acquisition module 100 may have a user interaction port, the user interaction port may be any one or combination of a mouse, a keyboard, a touch screen, a mechanical operation element, and the like, so as to allow an operator to enter information, and correspondingly, the data acquisition module 100 is further configured to acquire part of the cloth data at the cloth stage based on the entered information of the operator.

The instruction generation module 300 is configured to: and generating a material flow valve opening setting instruction aiming at the next material distribution stage.

Before entering the next material distribution stage, that is, before the data acquisition module 100 acquires the opening action signal of the material flow valve at the next material distribution stage, the instruction generation module 300 generates a material flow valve opening setting instruction so as to obtain the opening of the material flow valve used at the next material distribution stage, and therefore, the opening of the material flow valve at each material distribution stage in production is obtained in real time based on the control system, the control of the material flow rate at the top of the blast furnace is facilitated, and the smooth operation of the blast furnace is further stabilized.

In a preferred embodiment, the instruction generating module 300 generates the opening setting instruction of the material flow valves during the intermission between two adjacent material distribution stages, that is, when all the material flow valves (the material flow valve 6 and the material flow valve 7) on the furnace top are in a closed state. It can also be said that the instruction generating module 300 generates the opening setting instruction of the material flow valve whenever the data acquiring module 100 acquires a closing operation signal of one of the material flow valve 6 and the material flow valve 7 but does not acquire an opening operation signal of the other of the material flow valve 6 and the material flow valve 7.

Further, in actual production, before the material flow valve is opened to enter the material distribution stage, the instruction generating module 300 generates a material loading instruction, the feeding device 1 controllably loads the material into the material tank by taking the set material weight in the material distribution system as a standard, and after the material loading is finished, the material flow valve is opened again to enter the material distribution stage. Preferably, the instruction generating module 300 further generates the material flow valve opening setting instruction each time the instruction generating module 300 generates a charging instruction of the next material distributing stage.

The data acquisition module 100 is further configured to: and collecting the material tank number, the furnace burden type and the set material weight of the next material distribution stage. The specific collection mode of the material tank number, the type of the furnace charge and the set material weight in the next material distribution stage is the same as the specific collection mode of the material tank number, the type of the furnace charge and the set material weight in each material distribution stage in the foregoing, and the description is omitted.

The data input end of the data processing module 400 is connected to the data output end of the data storage module 200, and is configured to: and calling m historical material distribution stages with the same furnace burden type and the same material tank number as the next material distribution stage from the database, wherein m is a natural number greater than 1, and constructing a functional relation among the actual material weight W, the actual material distribution time T and the opening K of the material flow valve.

The data processing module 400 retrieves m historical material distribution stages from the database according to the type of the burden material and the number of the material tank of the next material distribution stage, where the type of the burden material of the m historical material distribution stages is the same as the type of the burden material of the next material distribution stage, and the number of the material tank of the m historical material distribution stages is the same as the number of the material tank of the next material distribution stage.

Based on the retrieved m historical material distribution stages, the data processing module 400 constructs a functional relationship between the actual material weight W, the actual material distribution time T, and the opening K of the material flow valve, that is, constructs a functional relationship based on the retrieved actual material weight W, the actual material distribution time T, and the opening K of the material flow valve in the m historical material distribution stages.

Preferably, the actual material weight W is calculated according to m historical material distribution stages_iActual distribution time T_iOpening K of material mixing valve_iWherein i1.. m, the data processing module 400 calculates coefficients

And further based on the calculated coefficient b, the data processing module 400 calculates the coefficient

Wherein, in the step (A),

and

is the average of m historical distribution stages.

Therefore, the function relation of the actual material weight W, the actual material distribution time T and the opening K of the material flow valve obtained by the data processing module 400 is W/T ═ a × K + b.

Correspondingly, the functional relationship W/T ═ a ═ by the data processing module 400 constructed based on the same charge type and charge bucket numberK + b also has four different sets of coefficients a corresponding to the four cases described above_jAnd b_jWhere j is 1, 2, 3, 4, that is, based on the above four cases, the corresponding functional relationship W/T is a_j×K+b_jJ is 1, 2, 3, 4. For example, if the burden type of the next material distribution stage is ore and the material tank number is No. 1 material tank 2, the data processing module 400 extracts m historical material distribution stages with the burden type of ore and the material tank number of No. 1 material tank 2 from the database, and based on the actual material weight W of the m historical material distribution stages_iActual distribution time T_iOpening K of material mixing valve_iWherein i is 1.. multidot.m, the coefficients are calculated

And further calculating to obtain coefficients

From this, the function relationship is obtained as W/T ═ a₃×K+b₃。

Further preferably, when the data processing module 400 retrieves m historical material distribution stages from the database, the m historical material distribution stages are retrieved from the database based on the principle that time is from the near to the far, where m is preferably greater than or equal to 100. Therefore, the historical material distribution stage with the same burden type and the same material tank number and similar to the current time is called to construct the functional relation, so that the current material tank condition can be more approximate, for example, the wear degree of the material tank is closer, and the opening K of the material flow valve is obtained based on the functional relation_nIs more accurate.

The data processing module 400 is further configured to: and inquiring a historical latest material distribution stage with the same furnace burden type as the next material distribution stage in the database, and judging whether the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight.

The historical latest burden distribution stage is determined based on the same burden type as the next burden distribution stage and is not the latest burden distribution stage in time in the database. For example, if the charge type of the next burden distribution stage is ore, and in normal production of the blast furnace, according to a conventional operation manner of alternately distributing ore and coke at intervals, the charge type of the nearest burden distribution stage in the database is coke, the burden distribution stage of the coke is not the historical nearest burden distribution stage in this step, and the burden distribution stage of the nearest ore before the burden distribution stage of the coke is the historical nearest burden distribution stage.

And judging whether the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight, namely judging whether the material tank number of the next material distribution stage is the same as the material tank number of the historical latest material distribution stage, and judging whether the set material weight of the next material distribution stage is the same as the set material weight of the historical latest material distribution stage.

The data acquisition module 100 is further configured to: when the judgment result is negative, collecting the actual material weight W of the next material distribution stage_nAnd setting the distribution time T_n。

If the result of the determination is negative, the next material distribution stage and the historical latest material distribution stage at least have different material tank numbers or at least have different set material weights, even the material tank numbers and the set material weights are different, in this case, the amplitude adjustment of the next material distribution stage in the material distribution aspect is larger than that of the historical latest material distribution stage, and the actual material weight W of the next material distribution stage is collected_nAnd setting the distribution time T_nThe actual material weight W_nAnd setting the distribution time T_nThe specific collection mode is the same as the actual material weight and the specific collection mode of the set material distribution time in each material distribution stage in the foregoing, and the detailed description is omitted.

The data processing module 400 is further configured to: when the judgment result is negative, the next material distribution stage is acquired by the data acquisition module 100Boundary material weight W_nAnd setting the distribution time T_nCalculating the opening K of the material flow valve at the next material distribution stage according to the function relation_n。

Specifically, the data processing module 400 collects the actual material weight W_nAnd setting the distribution time T_nSubstituting the function relation W/T into a multiplied by K + b to obtain the opening K of the material flow valve_n＝(W_n/T_n-b)/a. It will be understood that, in the functional relationship used herein, the coefficients a and b are both: based on m historical material distribution stages with the same material tank number and the same furnace charge type as the next material distribution stage, calculating the obtained coefficient a_jAnd b_j. For example, the type of the burden in the next material distribution stage is ore, the number of the burden tank is No. 1 burden tank 2, and is the 3 rd of the above four cases, and correspondingly, the data processing module 400 collects the actual burden weight W_nAnd setting the distribution time T_nSubstituting the functional relation W/T ═ a₃×K+b₃The opening K of the material flow valve at the next material distribution stage can be obtained through calculation_n＝(W_n/T_n-b₃)/a₃。

And the data processing module 400 is further configured to: when the judgment result is yes, the cloth time T is set according to the historical latest cloth stage₀Actual distribution time T₀', set the material weight W₀Actual material weight W₀' opening K of material flow valve₀And calculating the opening error delta K of the material flow valve at the historical latest material distribution stage according to the functional relation₀And calculating to obtain the opening K of the material flow valve at the next material distribution stage_n＝K₀+ΔK₀。

Specifically, if the determination result is yes, that is, the next material distribution stage and the historical latest material distribution stage have the same material tank number and set material weight, the next material distribution stage and the historical latest material distribution stage have the same material tank number, material type and set material weight, that is, the next material distribution stage is not adjusted in terms of material distribution greatly compared with the historical latest material distribution stage, in this case, the data processing module 400 performs the data processing according to the historical latest material distribution stageSetting the distribution time T₀Actual distribution time T₀', set the material weight W₀And actual material weight W₀', and calculating the flow valve opening error delta K of the historical latest distribution stage according to the functional relation W/T-a multiplied by K + b₀。

Preferably, the data processing module 400 will be based on a set material weight W₀Actual material weight W₀'calculated Material weight error W'₀-W₀And based on a set distribution time T₀Actual distribution time T₀'calculated cloth time error T'₀-T₀Respectively substituting the functions W/T into a multiplied by K + b to calculate the opening error of the material flow valve

Further calculating the opening K of the material flow valve_n＝K₀+ΔK₀。

It will be understood that, in the functional relationship used herein, the coefficients a and b are both: based on m historical material distribution stages with the same material tank number and the same furnace charge type as the next material distribution stage, calculating the obtained coefficient a_jAnd b_j. For example, the type of the charge in the next material distribution stage is ore and the number of the charge tank is 1 charge tank 2, and is the 3 rd of the above four cases, and accordingly, the data processing module 400 calculates the calculated material weight error W'₀-W₀And a cloth time error T'₀-T₀Substituting the functional relation W/T ═ a₃×K+b₃The opening degree of the material flow valve at the next material distribution stage can be obtained through calculation

The control module 500 calculates the opening K of the material flow valve obtained by the data processing module 400_nIs applied to the next clothA material stage, namely controlling the material flow valve of the next material distribution stage to have the opening K of the material flow valve_nAnd opening to further realize the material distribution of the next material distribution stage. For example, the programmable logic controller 9 at the top of the blast furnace controls the material flow valve in the next material distribution stage, and the opening K of the material flow valve calculated by the data processing module 400_nAnd (4) opening.

Further, the control system further includes an output module 600, and the output module 600 is configured to output the data information stored in the database, the data processing result of the data processing module 400, and the regulation result of the regulation module 500 to an operator.

Preferably, the output mode of the output module 600 may be implemented by any one or a combination of sound, text, graph, light, and the like. The output module 60 may be configured as any one or combination of a speaker, a display screen, a warning light, etc., and may also be integrated with a portion of the user interaction port of the data acquisition module 100.

In summary, compared with the prior art, the control system of the embodiment has the following beneficial effects: establishing a functional relation based on the same material tank number and the same type of furnace burden, and dividing the functional relation into two different situations according to the difference between the next material distribution stage and the historical nearest material distribution stage for utilization, wherein in one situation, when the difference between the next material distribution stage and the historical nearest material distribution stage is smaller, the functional relation is utilized to carry out error correction on the opening degree of the material flow valve in the historical nearest material distribution stage, so that the opening degree of the material flow valve can be accurately obtained for controlling the material flow valve in the next material distribution stage to realize accurate regulation and further forward movement of the blast furnace, in the other situation, when the difference between the next material distribution stage and the historical nearest material distribution stage is larger, the data in the next material distribution stage is substituted into the historical functional relation to obtain more accurate opening degree of the material flow valve for controlling the material flow valve in the next material distribution stage, the condition fluctuation of the blast furnace caused by blind setting of the opening of the material flow valve according to the experience of an operator is avoided.

For convenience of description, the control system is described by dividing functions into various modules and describing the control system respectively, and the control method is described by dividing logic into various steps and describing the control method respectively. The functions of the modules, logic of the steps, and the like may be implemented in any suitable combination of one or more of software, hardware, firmware in implementing the invention, for example, the control system and the control method may be implemented by any one or combination of a computer device 11 including a memory and a processor, a programmable logic controller 9, a computer readable storage medium storing a computer program, any other suitable machine having at least one processor.

The above-described control system embodiments are merely illustrative, wherein the modules illustrated as separate components may or may not be physically separate, and the components illustrated as modules may or may not be physical modules, may be located in one place, or may be distributed across multiple network modules, such as the internet 10 of fig. 2. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A method for controlling the opening of a blast furnace material flow valve is characterized by comprising the following steps,

2. The method of claim 1, wherein the function is W/T ═ a × K + b, and wherein: according to the actual material weight W of m historical material distribution stages_iActual distribution time T_iOpening K of material mixing valve_iWhere i is 1, …, m, is calculated

And obtaining

and

is the average of m historical distribution stages.

3. The method for controlling the opening of a blast furnace burden flow valve according to claim 2, wherein when the judgment result is negative, the opening K of the burden flow valve at the next burden distribution stage is calculated_n＝(W_n/T_n-b)/a。

4. The method for controlling the opening degree of a blast furnace burden flow valve according to claim 2, wherein when the judgment result is yes, the calculation is performed

5. The method for controlling the opening degree of the blast furnace burden flow valve according to claim 1, wherein in the step of calling m historical burden distribution stages having the same burden type and the same burden pot number as the next burden distribution stage in the database, m historical burden distribution stages having the same burden type and the same burden pot number as the next burden distribution stage are called in the database on the basis of a time-based near-to-far principle; wherein m is equal to or greater than 100.

6. The method for controlling the opening of a blast furnace burden flow valve according to claim 1, wherein the setting command of the opening of the burden flow valve for the next burden distribution stage is generated every time the instruction of the burden distribution stage is generated.

7. The method for controlling the opening degree of the blast furnace burden flow valve according to claim 1, wherein opening and closing action signals of the burden flow valve are collected to obtain actual burden distribution time, a burden tank number and burden types of each burden distribution stage;

8. A control system for the opening of a blast furnace flow valve is characterized by comprising a data acquisition module, a data storage module, an instruction generation module, a data processing module and a control module;

9. The system of claim 8, wherein the function is W/T ═ a × K + b, wherein: according to the actual material weight W of m historical material distribution stages_iActual distribution time T_iOpening K of material mixing valve_iWhere i is 1, …, m, is calculated

And obtaining

and

is the average of m historical distribution stages.

10. The system for controlling the opening degree of a blast furnace burden flow valve according to claim 9, wherein when any one of the bucket numbers and the set material weights of the next burden distribution stage and the historical latest burden distribution stage is different, the opening degree K of the material flow valve is calculated_n＝(W_n/T_n-b)/a；