CN101135586A - Measurement control method of hopper scale used for feeding revolving furnace - Google Patents

Abstract

The method comprises: 1) step of control null shift, evaluating the current show value of the hopper weight to the null shift value of hoper weight before next feeding; presetting the net weight of the hopper as 0; 2) the step of controlling the feed, satisfying the feed condition; starting up the electrical shaker to feed material; deciding the net weight of the hopper; the net weight of the hopper is to subtract the null shift from the previous weight; when the difference between the net weight of the hopper and the predetermined value trends to zero, stopping the feeding; otherwise, restarting the electrical shaker to feed material 3) step of control the discharging of the materials, if the weight of the hopper is W1, opening the valve to start up the discharging of the material; deciding if the current weight of the hopper is less or equal to 30kg or the time of discharging material is greater than or equal to 15 seconds, then closing the discharge valve; otherwise, continuing to discharge the material; 4) step of controlling the null shift value, removing the null shift value to get the actual discharge value W1+P1; displaying it; allowing to feeding material; completing one cycle.

Description

A kind of measurement control method of hopper scale used for feeding revolving furnace

Technical field: the present invention relates to the measurement control method that a kind of hopper claims, particularly a kind of measurement control method of hopper scale used for feeding revolving furnace.

Background technology: in the reinforced process of converter smelting, after the sticking material weighing discharging of high humidity, be bonded at cause the hopper sky on the bucket wall after weighing numerical value non-vanishing, and after reinforced at every turn discharging finishes, this numerical value is changing, sometimes even surpass to set reinforced numerical value, have a strong impact on operating personnel's operation, even cause hopper to stop up.The operation of prior art, the one, whenever allow to continue to feed in raw material, be unfavorable for the control of every batch of material like this, especially the charging valve misoperation causes material to be added to and causes the not easy to operate and control of the material that is added in the converter in the hopper too much; The 2nd, when being not sky, hopper do not allow to continue the operation of next batch of material, deduct the bigger numerical value that operating personnel fill in by the numerical value behind the hopper discharge, its poor＜0, allow reinforced, the institute that adds up on this basis adds material numerical value does not conform to the actual conditions, and is unfavorable for raw materials cost and controllable quality.

CN1028182C discloses " a kind of control method of bunker scale weighing and equipment thereof ", mainly be the time that the control feeding gate repeats to feed in raw material to carry out the feed supplement or the material returned, make the material metage deviation that is discharged into packaging bag be lower than the permission index, but this technology is difficult to accurate control for caking materials.

Summary of the invention: the purpose of this invention is to provide a kind of measurement control method of hopper scale used for feeding revolving furnace, hopper adhesion material causes measuring inaccurate technical matters during the interpolation that mainly solves viscous material.The control of drift when feeding in raw material by the converter hopper, when satisfying hopper for empty (hopper numerical value is 0), the operation of feeding in raw material, even cling material on the bucket wall, the material numerical value that each weighing adds converter is relatively accurate, helps steel quality and controls.

Technical scheme of the present invention is: a kind of measurement control method of hopper scale used for feeding revolving furnace, comprise that working as front hopper weighing value after drift controlled step: a, discharge gate are closed is P2, b, give P1 the P2 assignment, P1 for next time reinforced front hopper claim the drift value, c, to preset hopper net weight A be 0;

Reinforced controlled step: a,, satisfies by hopper when allowing reinforced condition, set the weight of material that adds converter, b, to start oscillating feeder then reinforced, c, carry out the judgement of hopper net weight, the hopper net weight is that preceding weight deducts the drift value, d, when the difference of hopper net weight and setting value approaches zero, and it is reinforced to stop oscillating feeder, when hopper net weight and setting value had difference, oscillating feeder continued reinforced;

Discharging controlled step: a, the hopper weighing value of preserving before discharge gate is opened is W1, b, open the hopper discharge valve and carry out discharging, c, enter determining step again, when the current weight of hopper≤30 kilograms or discharge gate are opened discharging time 〉=15 second, close discharge gate, if not, then continue discharging, d, discharge gate is closed, d, call the drift controlled step, eliminate the drift value, obtaining actual discharging value is W1-P1, send HMI to show, e, allow reinforced, enter addition step, f, the hopper weighing value of preserving before discharge gate is opened is W1, g, open the hopper discharge valve and carry out discharging, h, enter determining step again, open discharging time 〉=15 second when the current weight of hopper≤30 kilograms or discharge gate, close discharge gate, if not, then continue discharging, i, call the drift controlled step, and then enter the permission addition step, this moment, actual discharging value was W1-P2.

The invention has the beneficial effects as follows, controlled the bunker scale drift effectively, accurate Calculation adds the weight of material in the converter strictly according to the facts, has improved the control of production quality control and raw materials cost.Reduce operation steps simultaneously, show hopper drift value in real time on HMI, operating personnel and spot check personnel can correctly judge auxiliary material adhesion situation in the hopper according to value, in time clear up the buildup in the hopper, reduce the stifled card of hopper and cause the fault of can not feeding in raw material.Only consider the material statistics accurately, the annual material consumption cost that reduces obviously reduces.Consider product quality and equipment failure rate, remarkable benefit.

Description of drawings:

Fig. 1 bunker scale Weighting and Controlling System figure

Fig. 2 hopper drift steering logic figure

Fig. 3 hopper weighing steering logic figure that feeds in raw material

Fig. 4 hopper weighing discharging steering logic figure

Among Fig. 1: 1-oscillating feeder, the 2-hopper of getting the raw materials ready, 3-bunker scale A, 4-reinforced valve, 5-reinforced hopper, 6-bunker scale B, 7-discharge gate A, 8-discharge gate B, 9-converter.

Embodiment: with reference to Fig. 1,2,3,4, hopper claims Weighing system to be made up of oscillating feeder 1, the hopper 2 of getting the raw materials ready, reinforced valve 4 and discharge gate, and oscillating feeder 1, the hopper 2 of getting the raw materials ready, discharge gate A7, bunker scale A3, reinforced valve 4, reinforced hopper 5, discharge gate B8, bunker scale B6, converter 9 are arranged in order from top to bottom.Before not reinforced, when last discharging finished, bunker scale A3 weighing value was as the drift value P1 of the hopper 2 of getting the raw materials ready.Reinforced beginning: the operator sets the current weight of material that needs to add converter, when needs are reinforced, press reinforced button, control program calls reinforced control automatically, starting oscillating feeder 1, material adds in the hopper 2 of getting the raw materials ready, and control program is judged get the raw materials ready the net weight A (current weight W deducts drift value P1) of hopper 2 and the difference of setting value, if difference is near 0 value, stop oscillating feeder 1, stop to feed in raw material.Drift value and net weight value show in HMI simultaneously, are convenient to operating personnel and grasp reinforced situation, and the spot check personnel judge auxiliary material adhesion situation in hopper according to drift value size, arrange the hopper cleaning.

If it is empty that control program is judged reinforced hopper 5, then call the discharging control program automatically, open reinforced valve 4, open discharge gate A7, after net weight sent 15 seconds less than 30 kilograms or the material valve A7 instruction of starting discharging, program sent that auxiliary material net weight value is 0 in the instruction indication hopper, and the expression hopper is empty, program is sent and is closed discharge gate A7 instruction, closes reinforced valve 4 then.Receive the value of feedback that reinforced valve 4 has been closed when program, show the drift value that the hopper 2 of getting the raw materials ready is new, and preset the hopper 2 of getting the raw materials ready, allow once more reinforced for empty.

After reinforced hopper 5 added material, material need add converter, then called the discharging control program automatically, and the hopper weighing value of preserving before discharge gate is opened is W1, opens at discharge gate B8, and material adds in the converter.After net weight sent 15 seconds less than 30 kilograms or the material valve B8 instruction of starting discharging, program sent that material net weight value is 0 in the instruction indication hopper, and the expression hopper is empty, and program is sent and closed discharge gate B8 instruction.When program is received the value of feedback that discharge gate B8 has closed, show the drift value P2 that reinforced hopper 5 is new at HMI, and preset reinforced hopper 5 that allow once more reinforcedly, the actual weight of material that adds in the converter be (W1-P2), send HMI demonstration for empty.

Claims (1)

1. the measurement control method of a hopper scale used for feeding revolving furnace, it is characterized in that may further comprise the steps: working as front hopper weighing value after drift controlled step: a, discharge gate are closed is P2, b, give P1 the P2 assignment, P1 for next time reinforced front hopper claim the drift value, c, to preset hopper net weight A be 0;

Reinforced controlled step: a,, satisfies by hopper when allowing reinforced condition, set the weight of material that adds converter, b, to start oscillating feeder then reinforced, c, carry out the judgement of hopper net weight, the hopper net weight is that preceding weight deducts the drift value, d, when the difference of hopper net weight and setting value approaches zero, and it is reinforced to stop oscillating feeder, when hopper net weight and setting value had difference, oscillating feeder continued reinforced;

Discharging controlled step: a, the hopper weighing value of preserving before discharge gate is opened is W1, b, open the hopper discharge valve and carry out discharging, c, enter determining step again, when the current weight of hopper≤30 kilograms or discharge gate are opened discharging time 〉=15 second, close discharge gate, if not, then continue discharging, d, discharge gate is closed, d, call the drift controlled step, eliminate the drift value, obtaining actual discharging value is W1-P1, send HMI to show, e, allow reinforced, enter addition step, f, the hopper weighing value of preserving before discharge gate is opened is W1, g, open the hopper discharge valve and carry out discharging, h, enter determining step again, open discharging time 〉=15 second when the current weight of hopper≤30 kilograms or discharge gate, close discharge gate, if not, then continue discharging, i, call the drift controlled step, and then enter the permission addition step, this moment, actual discharging value was W1-P2.

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