CN102442537A - Blast furnace ore weighing and controlling system with each two tanks sharing one weighing hopper - Google Patents

Abstract

The invention discloses a blast furnace ore weighing and controlling system with each two tanks sharing one weighing hopper, which comprises a control module and a plurality of weighing hoppers. The control module is used for determining an error value when one main tank and one auxiliary tank share one weighing hopper, determining a feeding error compensation value according to the error value, performing feeding compensation according to the feeding error compensation value and determining a weighing target value. The blast furnace ore weighing and controlling system with each two tanks sharing one weighing hopper is capable of accurately distinguishing various conditions when raw materials in the main tanks and the auxiliary tanks are mixed and weighed, and the precision of supply total weight and supply weight at each time of various ore raw materials is guaranteed.

Description

The blast furnace ore Weighting and Controlling System of the shared scale hooper of two grooves

Technical field

The present invention relates to blast furnace groove discharge control technology field, the blast furnace ore Weighting and Controlling System of the shared scale hooper of particularly a kind of two grooves.

Background technology

In recent years, reduce investment outlay, reduce the requirement of land used for reaching, blast furnace ore feed begins to adopt main and auxiliary ore deposit groove to be arranged side by side the mode of the shared scale hooper in both sides.Simultaneously, the progress of Along with computer technology, the application of secondary machine in blast furnace system is also more and more general, and the enterprise that has has also disposed the full ERP of factory and has implemented expert system, and this has also produced comprehensively and deep effect the mode of ore feed.

New process characteristic and operating mode have proposed new requirement to the Weighting and Controlling of feed under the groove, and conventional control algorithm can not be satisfied fully, mainly contain following some:

(1), introduce secondary machine and ERP after, the feed prescription is generally set batch heavy by each material kind by secondary machine or ERP, the mode to each scale hooper intended target value in this and the conventional algorithm has than big difference;

(2), the feeder apparatus fault tends to cause than mistake, and conventional control algorithm generally adopts the scale hooper independent compensation mode of error separately, this moment is if the breakdown of equipment longer duration then can cause compensation untimely.And after the long period, conditions of blast furnace gets into new equilibrium stage, and original error need not compensation, and will cause mistake compensation if equipment recovers to use and operating personal is not manually removed original error this moment;

(3), behind the shared scale hooper of main and auxiliary ore deposit groove, adopt conventional algorithm can't obtain the blowing value of both sides raw material, more can't calculate error separately;

(4), the production status of big heat size, high load capacity requires that system has higher feeding speed under the groove, this is also to the ageing requirements at the higher level that proposed of weighing control algorithm.

Summary of the invention

One of the object of the invention provides a kind of blast furnace ore Weighting and Controlling System that can accurately carry out the shared scale hooper of two grooves of blowing compensation.

According to an aspect of the present invention, provide the blast furnace ore Weighting and Controlling System of the shared scale hooper of a kind of two grooves to comprise: control module, a plurality of scale hooper; Said control module, when confirming the shared said scale hooper of major trough and auxilliary groove, the error amount of blowing is confirmed blowing error compensation value according to said error amount, and carries out the blowing compensation according to said blowing error compensation value, confirms the weighing expected value.

Further, said control module comprises the first blowing determination module, said major trough and auxilliary groove blowing value separately when confirming the common weighing of major trough and auxilliary groove; The second blowing determination module, said major trough and auxilliary groove blowing value separately when confirming the weighing of major trough and auxilliary sheave stream; Blowing error determination module is confirmed the error value E of blowing according to said major trough and auxilliary groove blowing value separately _{K1_n}=W _{SetK1_n}-W _{K1_n}Said E _{K1_n}Be mineral K ₁The error amount of the n time blowing, said W _{SetK1_n}Be the n time mineral K ₁Batch reset definite value; Said W _{K1_n}Be mineral K ₁The n time total blowing amount, said

Said j is the number of scale hooper, said W _{K1_ni}Be mineral K ₁The blowing value of the major trough of the n time blowing or auxilliary groove; Blowing error compensation determination module is confirmed blowing error compensation value according to the blowing error amount that said blowing error determination module is confirmed

Wherein, $\mathrm{\δ}=\left\{\begin{array}{cc}{E}_{o\_K1}& \mathrm{If\Δ}2=1\\ E_{e\_K1}& \mathrm{If\Δ}2=2\end{array}\right.;$

If Δ 1=1;

If Δ 1=2; Wherein, said E _{Max_K1}Be the error compensation upper limit, said δ is the error intermediate value, said E _{O_K1}Be odd number time blowing error compensation value, said E _{E_K1}Be even number time blowing error compensation value, said Δ 1 is a deviation accumulation odd even token, and said Δ 2 is an error compensation odd even token;

Blowing expected value determination module is confirmed the blowing expected value according to the blowing error compensation value that said blowing error compensation determination module is confirmed $W_{t\mathrm{Arg}K1\_n}=\frac{\frac{W_{\mathrm{SetK}1\_n}}{(1-\mathrm{\α})}+E_{\mathrm{Com}\_K1}}{j}+W_{\mathrm{Cdz}\_n},$ When the storehouse number of the mineral K1 batching of participating in is j, said W _{TargK1_n}Be the n time expected value of single scale hooper of participation work, said W _{Cdz_n}For claiming floors, said W _{SetK1_n}Be the n time mineral K ₁Batch reset definite value, said E _{Com_K1}Be blowing error compensation value, said α is moisture.

Further, the first blowing determination module comprises: the 3rd blowing is confirmed the unit, confirms that the total blowing value of scale hooper is not less than said major trough material said major trough and auxilliary groove blowing value separately during the value of blowing in scale hooper when full, the blowing value W of said major trough _{A_n}=W _{LmA_n}-W _{Lk_n-1}+ η (W _{Lk_n-1}-W _{Lk_n}), the blowing value W of said auxilliary groove _{B_n}=W _{Lm_n}-W _{LmA_n}+ (1-η) (W _{Lk_n-1}-W _{Lk_n}); The 4th blowing is confirmed the unit, confirm the total blowing value of scale hooper less than said major trough material said major trough and auxilliary groove blowing value separately during the value of blowing in scale hooper when full, the blowing value W of said major trough _{A_n}=W _n-(1-η) W _{Lk_n-1}, the blowing value W of said auxilliary groove _{B_n}=W _n-W _{A_n}Wherein, W _n=W _{Lm_n}-W _{Lk_n}, said

Said W _{LmA_n}Be the n time weighing major trough material value of blowing in scale hooper when full, said W _{Lm_n}Be that the n time material in the scale hooper completely is worth said W _{Lk_n}Be residual value after the n time blowing accomplished, said W _{Lk_n-1}Be residual value after the n-1 time blowing accomplished, said W _{SetA_n}Major trough blowing setting value when being the n time weighing; W _{SetB_n}Auxilliary groove blowing setting value when being the n time weighing.

Further, the said second blowing determination module comprises: the 5th blowing is confirmed the unit, confirms that last time, list was claimed major trough, when next time, groove assisted in single title, and major trough and auxilliary groove blowing value separately, the blowing value W of said major trough _{A_n}=W _{Lk_n-1}The blowing value W of said auxilliary groove _{B_n}=W _{Lm_n}-W _{Lk_n-1}-W _{Lk_n}The 6th blowing is confirmed the unit, confirms the auxilliary groove of single title last time, when next time, list was claimed major trough, and major trough and auxilliary groove blowing value separately, the blowing value W of said major trough _{A_n}=W _{Lm_n}-W _{Lk_n-1}-W _{Lk_n}, the blowing value W of said auxilliary groove _{B_n}=W _{Lk_n-1}Wherein, said W _{A_n}Be the blowing value of major trough, said W _{B_n}Be the blowing value of auxilliary groove, said W _{Lk_n-1}Be residual value after the n-1 time blowing of scale hooper accomplished, said W _{Lk_n}Be residual value after the n time blowing of scale hooper accomplished, said W _{Lm_n}Be that the n time material in the scale hooper completely is worth.

Further, said control module realizes through DSP, ARM, FPGA or PLC.

Further, the weight transmitter, said weight transmitter is connected between said control module and the said scale hooper.

Further, said scale hooper all disposes limit switch and weight sensor.

The blast furnace ore Weighting and Controlling System of the shared scale hooper of two grooves provided by the invention, the various situations during to major trough and auxilliary groove raw material mixing weighing have carried out distinguishing accurately, have guaranteed the precision of various ore supply total weightes and single supply weight.

Description of drawings

Fig. 1 is the blast furnace ore Weighting and Controlling System framework map of the shared scale hooper of two grooves that provides of the embodiment of the invention;

Fig. 2 is the control module structured flowchart that the embodiment of the invention provides;

Scale hooper charge level distribution schematic diagram when Fig. 3 is the common weighing of major trough and auxilliary groove;

The charge level scheme drawing that distributes when Fig. 4 is the weighing of major trough and auxilliary sheave stream;

Another scheme drawing of charge level distribution when Fig. 5 is major trough and the weighing of auxilliary sheave stream.

The specific embodiment

As shown in Figure 1, the blast furnace ore Weighting and Controlling System of the shared scale hooper of two grooves that the embodiment of the invention provides, it comprises control unit, weight transmitter, storagetank (comprising major trough A and auxilliary groove B), feeder, vibrating grizzly and scale hooper.Wherein, control unit is used to control major trough A, auxilliary groove B, feeder and vibrating grizzly at the scale hooper discharge.To combine embodiment shown in Figure 2 to be elaborated as for how to control.Control unit can be realized with DSP, ARM, FPGA or PLC.Each scale hooper all disposes limit switch and weight sensor.Wherein, limit switch comprises and reaches the position and close two places that put in place, through common cable Access Control unit.Can identify and to reach position, indefinite position (neither reach position also do not put in place), close signal such as put in place in the pass through this limit switch.Weight sensor converts scale hooper weight into electric signal and sends into corresponding weight transmitter, and inserts control unit through the Profibus-DP bus.Can accurately obtain the gravimetric value of scale hooper through weight sensor, thereby discern the signal that discharging is empty, material is full.

As shown in Figure 2, control module comprises the first blowing determination module 1, the second blowing determination module 2, blowing error determination module 3, blowing error compensation determination module 4 and blowing expected value determination module 5.

Said major trough A and auxilliary groove B blowing value separately when the first blowing determination module 1 is confirmed the common weighing of major trough A and auxilliary groove B.The first blowing determination module 1 comprises that the 3rd blowing confirms that unit and the 4th blowing confirm the unit.In conjunction with Fig. 3 the 3rd blowing is confirmed that unit and the 4th blowing confirm that the unit describes.The 3rd blowing confirms that the unit confirms that the total blowing value of scale hooper is not less than said major trough A material said major trough A and auxilliary groove B blowing value separately during the value of blowing in scale hooper when full, the blowing value W of said major trough A _{A_n}=W _{LmA_n}-W _{Lk_n-1}+ η (W _{Lk_n-1}-W _{Lk_n}), the blowing value W of said auxilliary groove B _{B_n}=W _{Lm_n}-W _{LmA_n}+ (1-η) (W _{Lk_n-1}-W _{Lk_n}).The 4th blowing confirm the unit confirm the total blowing value of scale hooper less than said major trough A material said major trough A and auxilliary groove B blowing value separately during the value of blowing in scale hooper when full, the blowing value W of said major trough A _{A_n}=W _n-(1-η) W _{Lk_n-1}, the blowing value W of said auxilliary groove B _{B_n}=W _n-W _{A_n}Wherein, said W _nBe total blowing value W _n=W _{Lm_n}-W _{Lk_n},

Said W _{LmA_n}Be the n time weighing major trough A material blowing value in scale hooper when full, said W _{Lm_n}Be that the n time material in the scale hooper completely is worth said W _{Lk_n}Be residual value after the n time blowing accomplished, said W _{Lk_n-1}Be residual value after the n-1 time blowing accomplished, said W _{SetA_n}Major trough A blowing setting value when being the n time weighing; W _{SetB_n}Auxilliary groove B blowing setting value when being the n time weighing.

Said major trough A and auxilliary groove B blowing value separately when the second blowing determination module, 2 definite major trough A and auxilliary groove B take turns weighing.The second blowing determination module 2 comprises that the 5th blowing confirms that unit and the 6th blowing confirm the unit.Confirm that in conjunction with Fig. 4,5 pairs of the 5th blowings unit and the 6th blowing confirm that the unit describes.The 5th blowing is confirmed the unit, confirms that last time, list was claimed major trough A, when next time, groove B assisted in single title, and major trough A and auxilliary groove B blowing value separately, the blowing value W of said major trough A _{A_n}=W _{Lk_n-1}The blowing value W of said auxilliary groove B _{B_n}=W _{Lm_n}-W _{Lk_n-1}-W _{Lk_n}The 6th blowing is confirmed the unit, confirms the auxilliary groove B of single title last time, when next time, list was claimed major trough A, and major trough A and auxilliary groove B blowing value separately, the blowing value W of said major trough A _{A_n}=W _{Lm_n}-W _{Lk_n-1}-W _{Lk_n}, the blowing value W of said auxilliary groove B _{B_n}=W _{Lk_n-1}Wherein, said W _{A_n}Be the blowing value of major trough A, said W _{B_n}Be the blowing value of auxilliary groove B, said W _{Lk_n-1}Be residual value after the n-1 time blowing of scale hooper accomplished, said W _{Lk_n}Be residual value after the n time blowing of scale hooper accomplished, said W _{Lm_n}Be that the n time material in the scale hooper completely is worth.

The error value E that said major trough A that blowing error determination module 3 is confirmed according to the first blowing determination module 1 and the second blowing determination module 2 and auxilliary groove B blowing value are separately confirmed blowing _{K1_n}=W _{SetK1_n}-W _{K1_n}Said E _{K1_n}Be mineral K ₁The error amount of the n time blowing, said W _{SetK1_n}Be the n time mineral K ₁Batch reset definite value (every batch of value of wanting blowing setting in advance); Said W _{K1_n}Be mineral K ₁The n time total blowing amount, said

Said j is the number of scale hooper, said W _{K1_ni}Be mineral K ₁The major trough A of the n time blowing or the blowing value of auxilliary groove B can be confirmed through the first blowing determination module 1 and the second blowing determination module 2, repeat no more.

The blowing error amount that blowing error compensation determination module 4 is confirmed according to blowing error determination module 3 is confirmed blowing error compensation value Wherein, $\mathrm{\δ}=\left\{\begin{array}{cc}{E}_{o\_K1}& \mathrm{If\Δ}2=1\\ E_{e\_K1}& \mathrm{If\Δ}2=2\end{array}\right.;$

If Δ 1=1;

If Δ 1=2; Wherein, said E _{Max_K1}Be the error compensation upper limit, said δ is the error intermediate value, said E _{O_K1}Be odd number time blowing error compensation value, said E _{E_K1}Be even number time blowing error compensation value, said Δ 1 is a deviation accumulation odd even token, and said Δ 2 is an error compensation odd even token.

The blowing error compensation value that blowing expected value determination module 5 is confirmed according to said blowing error compensation determination module 4 is confirmed the blowing expected value $W_{t\mathrm{Arg}K1\_n}=\frac{\frac{W_{\mathrm{SetK}1\_n}}{(1-\mathrm{\α})}+E_{\mathrm{Com}\_K1}}{j}+W_{\mathrm{Cdz}\_n},$ When the storehouse number of the mineral K1 batching of participating in is j, said W _{TargK1_n}Be the n time expected value of single scale hooper of participation work, said W _{Cdz_n}For claiming floors, said W _{SetK1_n}Be the n time mineral K ₁Batch reset definite value, said E _{Com_K1}Be blowing error compensation value, said α is moisture.

Below in conjunction with an instantiation, describe how to carry out the blowing compensation through two tokens.

(1), the 1st ore weighing of beginning, this moment Δ 1=1, Δ 2=1, each ore kind odd number, even number time deviation accumulation value are 0, need not compensate.

(2), the ore of the 1st weighing disperses the scale hooper discharge intact until whole rows from each successively; According to the described system of preamble, draw each ore kind error amount, because of Δ 1=1; So error amount is counted odd number time deviation accumulation value, and even number time deviation accumulation value still is 0.Because of the present invention (for example: compensate the error that the 1st batch of material produces when joining the 3rd batch of material adopts " at a distance from batch compensation "; Compensate the error that the 2nd batch of material produces when joining the 4th batch of material; The rest may be inferred) system, so in the process that the 1st ore discharged, can carry out the weighing process of the 2nd ore simultaneously, and Δ 2 is changed to 2; Because of even number time deviation accumulation value is 0, need not compensate.

(3), that the ore of the 2nd weighing disperses scale hooper to discharge until whole rows from each successively is intact, and Δ 1 is changed to 2, error amount is counted even number time deviation accumulation value, and odd number time deviation accumulation value remains unchanged.Because of the present invention adopts the system of " at a distance from batch compensation ", thus in the process of the 2nd ore discharge, can carry out the weighing process of the 3rd ore simultaneously, and Δ 2 is changed to 1, count the blowing expected value with odd number time deviation accumulation value as the error compensation value this moment, sees for details $W_{t\mathrm{Arg}K1\_n}=\frac{\frac{W_{\mathrm{SetK}1\_n}}{(1-\mathrm{\α})}+E_{\mathrm{Com}\_K1}}{j}+W_{\mathrm{Cdz}\_n}.$

(4), that the ore of the 3rd weighing disperses scale hooper to discharge until whole rows from each successively is intact, and Δ 1 is changed to 1, error amount is counted odd number time deviation accumulation value, and even number time deviation accumulation value remains unchanged.Because of the present invention adopts the system of " at a distance from batch compensation ", thus in the process of the 3rd ore discharge, can carry out the weighing process of the 4th ore simultaneously, and Δ 2 is changed to 2, count the blowing expected value with even number time deviation accumulation value as the error compensation value this moment, sees for details $W_{t\mathrm{Arg}K1\_n}=\frac{\frac{W_{\mathrm{SetK}1\_n}}{(1-\mathrm{\α})}+E_{\mathrm{Com}\_K1}}{j}+W_{\mathrm{Cdz}\_n}.$

So move in circles.

The blast furnace ore Weighting and Controlling System of the shared scale hooper of two grooves that provides according to the embodiment of the invention; Various situations during to major trough A, the raw material mixing weighing of auxilliary groove B both sides have carried out distinguishing comparatively accurately; Guaranteed the precision of various ore supply total weightes and single supply weight; Owing to the blowing error is carried out " by batch compensation ", reduce manipulation strength simultaneously, improved production efficiency and feeding speed.

The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (7)

1. the blast furnace ore Weighting and Controlling System of the shared scale hooper of groove, its characteristic in, comprising:

Control module, a plurality of scale hooper;

Said control module, when confirming the shared said scale hooper of major trough and auxilliary groove, the error amount of blowing is confirmed blowing error compensation value according to said error amount, and carries out the blowing compensation according to said blowing error compensation value, confirms the weighing expected value.

2. control system according to claim 1 is characterized in that, said control module comprises:

The first blowing determination module, said major trough and auxilliary groove blowing value separately when confirming the common weighing of major trough and auxilliary groove;

The second blowing determination module, said major trough and auxilliary groove blowing value separately when confirming the weighing of major trough and auxilliary sheave stream;

Blowing error determination module is confirmed the error value E of blowing according to said major trough and auxilliary groove blowing value separately _{K1_n}=W _{SetK1_n}-W _{K1_n}Said E _{K1_n}Be mineral K ₁The error amount of the n time blowing, said W _{SetK1_n}Be the n time mineral K ₁Batch reset definite value; Said W _{K1_n}Be mineral K ₁The n time total blowing amount, said

Said j is the number of scale hooper, said W _{K1_ni}Be mineral K ₁The blowing value of the major trough of the n time blowing or auxilliary groove;

Blowing error compensation determination module is confirmed blowing error compensation value according to the blowing error amount that said blowing error determination module is confirmed

Wherein, $\mathrm{\δ}=\left\{\begin{array}{cc}{E}_{o\_K1}& \mathrm{If\Δ}2=1\\ E_{e\_K1}& \mathrm{If\Δ}2=2\end{array}\right.;$

If Δ 1=1;

If Δ 1=2; Wherein, said E _{Max_K1}Be the error compensation upper limit, said δ is the error intermediate value, said E _{O_K1}Be odd number time blowing error compensation value, said E _{E_K1}Be even number time blowing error compensation value, said Δ 1 is a deviation accumulation odd even token, and said Δ 2 is an error compensation odd even token;

Blowing expected value determination module is confirmed the blowing expected value according to the blowing error compensation value that said blowing error compensation determination module is confirmed $W_{t\mathrm{Arg}K1\_n}=\frac{\frac{W_{\mathrm{SetK}1\_n}}{(1-\mathrm{\α})}+E_{\mathrm{Com}\_K1}}{j}+W_{\mathrm{Cdz}\_n},$ When the storehouse number of the mineral K1 batching of participating in is j, said W _{TargK1_n}Be the n time expected value of single scale hooper of participation work, said W _{Cdz_n}For claiming floors, said W _{SetK1_n}Be the n time mineral K ₁Batch reset definite value, said E _{Com_K1}Be blowing error compensation value, said α is moisture.

3. control system according to claim 2 is characterized in that, the first blowing determination module comprises:

The 3rd blowing is confirmed the unit, confirms that the total blowing value of scale hooper is not less than said major trough material said major trough and auxilliary groove blowing value separately during the value of blowing in scale hooper when full, the blowing value W of said major trough _{A_n}=W _{LmA_n}-W _{Lk_n-1}+ η (W _{Lk_n-1}-W _{Lk_n}), the blowing value W of said auxilliary groove _{B_n}=W _{Lm_n}-W _{LmA_n}+ (1-η) (W _{Lk_n-1}-W _{Lk_n});

The 4th blowing is confirmed the unit, confirm the total blowing value of scale hooper less than said major trough material said major trough and auxilliary groove blowing value separately during the value of blowing in scale hooper when full, the blowing value W of said major trough _{A_n}=W _n-(1-η) W _{Lk_n-1}, the blowing value W of said auxilliary groove _{B_n}=W _n-W _{A_n}, said W _n=W _{Lm_n}-W _{Lk_n}

Wherein, said W _nBe total blowing value W _n=W _{Lm_n}-W _{Lk_n}, said

Said W _{LmA_n}Be the n time weighing major trough material value of blowing in scale hooper when full, said W _{Lm_n}Be that the n time material in the scale hooper completely is worth said W _{Lk_n}Be residual value after the n time blowing accomplished, said W _{Lk_n-1}Be residual value after the n-1 time blowing accomplished, said W _{SetA_n}Major trough blowing setting value when being the n time weighing; W _{SetB_n}Auxilliary groove blowing setting value when being the n time weighing.

4. control system according to claim 2 is characterized in that, the said second blowing determination module comprises:

The 5th blowing is confirmed the unit, confirms that last time, list was claimed major trough, when next time, groove assisted in single title, and major trough and auxilliary groove blowing value separately, the blowing value W of said major trough _{A_n}=W _{Lk_n-1}The blowing value W of said auxilliary groove _{B_n}=W _{Lm_n}-W _{Lk_n-1}-W _{Lk_n}

The 6th blowing is confirmed the unit, confirms the auxilliary groove of single title last time, when next time, list was claimed major trough, and major trough and auxilliary groove blowing value separately, the blowing value W of said major trough _{A_n}=W _{Lm_n}-W _{Lk_n-1}-W _{Lk_n}, the blowing value W of said auxilliary groove _{B_n}=W _{Lk_n-1}

Wherein, said W _{A_n}Be the blowing value of major trough, said W _{B_n}Be the blowing value of auxilliary groove, said W _{Lk_n-1}Be residual value after the n-1 time blowing of scale hooper accomplished, said W _{Lk_n}Be residual value after the n time blowing of scale hooper accomplished, said W _{Lm_n}Be that the n time material in the scale hooper completely is worth.

5. according to each described system of claim 1-4, it is characterized in that:

Said control module realizes through DSP, ARM, FPGA or PLC.

6. system according to claim 5 is characterized in that, also comprises:

The weight transmitter, said weight transmitter is connected between said control module and the said scale hooper.

7. according to each described system of claim 1-4, it is characterized in that:

Said scale hooper all disposes limit switch and weight sensor.

Images