SU390579A1 - METHOD FOR MEASUREMENT OF INTENSITY AND NERLIN11-RNOSTI OF DEPRESSING THE CHARGE IN DOMAINS - Google Patents

Description

The invention is related to the metallurgical industry and may be used to control the blast furnace operation.

From the well-known methods of measuring the intensity of the blast furnace according to the values of the pig iron casting per unit of time, the amount of burned totaled. Indicators of the course of travel are reduced to a visual observation of the frequency of intake of innings, the number of nicknames on the pressure charts blowing pressure and the flue gas.

The disadvantage of known intensity indices is that they can fluctuate not only from the perfection of the work itself, but also from interferences, such as iron oscillations in charge, external to the workflow process, for example, iron alloy angle for iron, etc. Indicators of roBality of the course "but gas can be cleaved over a wide range while maintaining a regular onuskapi charge column. On the other hand, the measurement of the linear lowering rate of the charge essentially depends on the oscillations of the bulk weights, the components of the graft, and is weakly consistent with the smelting of iron.

The method of measuring the iniquity of the unevenness of lowering the charge in blast furnaces to stabilize the desired level of the signal and the weight of the ore feeding part is characterized in that, in order to improve the measurement accuracy, the response times are recorded

2

feeds, measure the time intervals between two consecutive feeds, convert them into a signal inversely proportional to the size of these intervals, and the signal of the difference between their consecutive values and determine the intensity and unevenness of lowering the charge, respectively, in proportion to these signals.

Pre-blast, im; In the blast furnace, there are processes of physico-chemical processing of iron ore materials, and not gas-generating processes, therefore, the law of effective masses can be used to calculate the indicator of smelting intensity:

tic

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according to which the reaction rate is expressed in the consumption of a substance in units1, per time. The outcome of the pz function of the blast furnace, as an annarat for the treatment of iron-containing materials, can be a measure of the intensity / p - intensity “but ore. The difference in furnace performance by cast iron and its throughput is that the throughput capacity is determined by

AT

de

- weight of the ore part in the feed,

t s is the time of actuation of feeds, i.e. the time between two meals by lowering feeds from a large cone. Usually, in practice, the value of the weight of ore materials in the supply of Bp by, holds: constant, replica heating of the furnace with the weight of the fuel part, i.e. measurement / p can be reduced to one measurement of TC, inversely proportional / p, i.e. a minimum of information is needed, which consists in measuring as accurately as possible the consecutive values of Tc Under the condition of constant BP. The measurement errors of the Tc depend on the accuracy of the measurement of the reference level of the signal and it is possible to find the conditions under which they will be eliminated by applying mechanical mechanical radio sensors of all the level sensors. At the same time, the prolucation of the path of charging the charge should have a reserve in relation to the capacity of the furnace. To measure the degree of oscillation of the furnace stroke, i.e. the "evenness of the stroke," you can use the slip dispersion formula TC. The formula for a simple dispersion is of the form (y-Usl p where y and Usg .., are the unit and arithmetic mean value of the interlacing y, n is the number of terms of the dipamic series. To obtain the current values, it is necessary to go to glide along the row In order to take into account the total amplitude of oscillations at 2, a factor of 0.5 S is omitted where / is the order of a certain number of feed.In machine calculation b, comparable progress estimates are obtained for each given blast furnace, instead of a small assessment of the technological diagrams of the operation of the probes Thus, the measurement The intensity and evenness of the kiln operation in terms of TI- and 5 indices allows us to obtain numerical estimates of the kiln's progress, i.e., significantly improve the accuracy (Monitoring the dynamic parameters of the blast furnace process. Fig. 1 shows an example of the implementation of the proposed method in the form of structural diagrams that can be performed on a variety of elements (digital modules, integrated circuits, etc.); FIG. 2 - A sample of the diagram of measurements taken from blast furnace No. 3 of the metallurgical plant named after Ilyich. The time counter / is turned on when the signal 2 on the beginning of the next supply set (the first polling of the controller of the load program) coincides with the signal 3 on the opening of the large cone. This is necessary to avoid spurious signals when moving from loading joint feeds to separate ones, i.e., so-called ones that descend from a large cone in two steps, with the second half feed descending after the first without reaching a predetermined level. The counter is reset to its initial state at the time of the next lowering of the cone. In counting knots. Le 4 remembers the consecutive values of Te and calculates their differences b. The feed counter 5 feeds signals to node 4 to shift by one count when calculating "sliding Values". The device 6 serves to register both quantities and is equipped with a double scale and a smoothing circuit of parameters. The subject of the invention is a method for measuring the intensity and unevenness of lowering the charge in blast furnaces by stabilizing the specified backfill levels and the weight of the ore portion of the feed, characterized in that, in order to improve the measurement accuracy, the trigger times of feeds are measured, the time intervals between two consecutive feeds are converted The signal, inversely proportional to the magnitude of these intervals, and the signal of the difference between their successive values, are determined proportionally to these signals, respectively and uneven lowering of the charge.

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