Charging bucket weighing differential pressure compensation method for serial bell-less furnace top

Abstract

The invention relates to a charging bucket weighing differential pressure compensation method for a serial bell-less furnace top, which comprises the steps as follows: the real material weight in a charging bucket is acquired; the weighing values (is expressed in W weighing) of a plurality of groups of material weight, the furnace top pressure (is expressed in P furnace top) and the charging bucket pressure value (is expressed in P charging bucket) are read in batches during primary pressure balancing and secondary pressure balancing process of the charging bucket; the charging bucket weighing differential pressure compensation coefficient is determined; the charging bucket weighing differential pressure compensation coefficient is written in a PLC (Programmable Logic Controller) memory database and old data is updated; a PLC reads the P furnace top, the P charging bucket and the W weighing in a periodic manner during the unloading process of the charging bucket; the material weight differential pressure compensation value is calculated dynamically during the unloading process of the charging bucket; and the material distribution of the charging bucket is finished, and the next loading of the charging bucket is waited. The charging bucket weighing differential pressure compensation method can effectively solve the technical problem that the differential pressure compensation coefficient deviates caused by peripheral factors of a blast furnace, achieves accurate weight measurement of the charging bucket under high pressure, ensures the accurate control in a gravimetric method during the distributing process, enables a bell-less distributing system of the blast furnace to control the distributing flow stably, uniformly and accurately, and obviously improves the smelting level of blast furnace iron making.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking on a bellless furnace top, in particular to a weighing differential pressure compensation method for batch tanks on a bellless furnace top. Background technique [0002] With the development of smelting technology, the current blast furnace generally adopts bellless top for material distribution, there are tankless bellless, combined tankless bell, three tankless bellless, double bell and four valve types, etc. Among them, the series tank without material bell occupies a dominant position. At present, the large-scale blast furnaces under construction basically adopt the charging process of the series tank without material bell system. In order to improve the efficiency of blast furnace smelting, the technical requirements for the refinement of cloth are getting higher and higher. Due to the harsh production environment of the blast furnace top and the limitation of the installati...

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Problems solved by technology

[0004] At present, the commonly used weighing differential pressure compensation method is the linear compensation method. This method cannot correct the linear compensation coefficient in real time, and cannot continuously ensure the accuracy and stability of the weighing value of the tank.

In the invention patent with the publication number CN101985669A and the invention title "Differential Pressure Compensation Self-Correction Method for Furnace Top Tank Weighing", a method for correcting the weighing differential pressure compensation coefficient with a periodic memory compensation method is described. Although this method can effectively solve the technical problem of linear compensation coefficient drift caused by peripheral factors of the blast furnace, the production practice shows that this method is too sensitive to the measurement data of "bad points". When the weighing value of the tank is seriously inaccurate, it will often cause fluctuations in the self-correction linear compensation coefficient, and there is no "bad point" data removal mechanism, so that these data may always affect the subsequent self-correction results, and there is a hidden danger of further deterioration of the self-correction results

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