SU1504253A1 - Method of charging a blast furnace - Google Patents

Abstract

The invention relates to ferrous metallurgy, in particular, to methods for charging blast furnaces with tray-type charge distributors. The purpose of the invention is to increase the uniform distribution of the charge over the cross section of the furnace. To do this, when distributing a portion of it to the corner stations, control the mass of the portion of the portion at each corner station and adjust the target mass assignment for each subsequent target, taking into account the error when loading the previous portion of the portion.

Description

The invention relates to ferrous metallurgy, in particular to blast furnace production, and can be used on blast furnaces equipped with coneless loading devices.

The purpose of the invention is to increase the uniform distribution of the charge material over the furnace cross section.

The essence of the loading method is as follows.

After weighing the next portion of the charge (M), recruited into the intermediate hopper of the charging unit, in the computer complex of the furnace loading control, its mass is divided in the required proportion into specified parts determined by the number of angular positions (stations) of the distribution (K),

according to pro cj

Litelny tray grams of loading.

After unloading the given part m, the portion at the first angular position (K 1) of the tray, it is compared with the actual unloaded mass (t) and the error d is determined.

Next, the fraction j of the specified mass m, unloaded at the second angular position (K 2), from the actually remaining mass of the portion (and the fraction of the error (, J j) from the given mass (at the first angular position (K 1), incoming c to the mass () of the second angular position (K 2), after which it is determined to e- c the value of the corrected mass

cl

about

4i N9 SL

00

for unloading at the second angular position of the tray

(C-C.JI (})

m

 m,

 J7

the prototype, i.e. g /, -4.75 tons, for 0.95 tons, -0.95 tons, 4.75 tons. Based on this, the actual array

After unloading the mass of the batch, with-, the discharged material, according to the loading angle on the second m corner, will be

(f I

tray, the operation by definition is the corrected mass () of the portion for unloading at the third corner

t g 22.04 - 0.95 21.09 t. To determine the corrected mass of the charge discharged on the third

10 angular position taken (/ j

m

0.95 tons, the share of the third predetermined part of 22.04 tons of portions in the remaining

(k 3) position relative to a given mass (t yv performed on a turn. j -t ff vv- 1

The distribution of the magnitude of the error (sO mass j, 0.49 and 22.04 + unloaded part of the mass of the portion by + 0.49 x 0.95 22.50 tons. The mass of the actual (K 1) angular position on everything is unloaded on the third corner

the position of the tray will be 22.50 + 0.95 23.45 tons.

In the fourth corner field, the following positions of the tray reduce the uneven distribution of the charge material over the angular positions, and therefore over the cross-section of the furnace top. In the case when FAC-20 is 21.960 t with adjusted

loaded with all remaining mass

textile weight ha discharged

mass t 22,50 - 1,025 x 0,95 K-th angular position of the lotus, the same 21,53 t.

With a given mass (t), the magnitude of the uneven distribution of the mixes - errors (SHz) and the unevenness of the calculation of the angular positions of the composition tray of the material according to the angular position 25 turns of Lf 40%, with the proposed sprototype, i.e. . g /, -4.75 tons, for 0.95 tons, -0.95 tons, 4.75 tons. Based on this, the actual array

(f I

 -

t g 22.04 - 0.95 21.09 t. To determine the corrected mass of the charge discharged on the third

the angular position is taken (/ j

m

0.95 tons, the share of the third predetermined part of 22.04 tons of portions in the remaining

 j -f ff vv- 1

mass j, 0.49 and 22.04 + + 0.49 x 0.95 22.50 tons. The mass is actually unloaded at the third corner

At the fourth corner of the floor you are 21.960 tons with the adjusted

loaded with all remaining mass

The heights of the m tray are zero.

The implementation of the proposed method of loading consider the following example.

Example. Without using this method of loading, the chute charging device actually unloads the porous mass of the ore part of the charge with a mass of 95 tons, at four angular positions

sobe - 4 28%.

Thus, the method of charging the blast furnace allows maintaining the furnace loading rate with the maximum possible emptying time, due to which the quality of distribution of charge materials over the furnace cross section is significantly improved and, thus, the technical and economic indicators of the blast smelting are improved.

Claims (1)

The invention of the method of loading a blast furnace. x (k 4) distribution tray and given masses of 23.75 tons in the following quantity: 28.5 tons; 22.8 tons; 24.7 t; 19.0 tons According to the invention, after unloading, predominantly with a rotating tray of material from an intermediate bun dispenser, comprising a set of a filling apparatus kerosene with a predetermined and weighing portion of the material in a bunion mass of 23.75 tons and, in fact, of the filling machine cores with a subsequent mass of , 28.5 tons of loading portions of a portion of a given-distribution tray, which is of the same weight per corner station, is distributed in the first angular position of the casting tray, characterized in that (K 1), an error of about 4.75 tons, fraction second given hour and the portions 23,75 into the remaining that, in order to increase the uniform distribution of the material over the furnace cross section, the weight of the portion of the portion discharged to the corner station is additionally monitored, compared with the target and the weight of the subsequent parts is adjusted in accordance with the mathematical expression 23.75, mass j, the corrected part of the mass (t) relative to the given mass m from the expression t 23.75 - 0.36 x X 4.75 22.04 t. To compare the loading method, the magnitude of the Hz error for each angular position is taken similarly sobe - 4 28%. Thus, the method of blast furnace loading maintains the furnace loading rate with the maximum possible emptying time, due to which the quality of distribution of charge materials over the furnace cross section is significantly improved and, thus, the technical and economic indicators of blast furnace smelting are improved. The invention of the method of loading a blast furnace. mainly with a rotating tray distributor, which includes the collection and weighing of a portion of the material in the hoppers of the charging unit with the subsequent loading of portions of the portion of a given weight to the corner stations of the distributor, characterized in that, in order to increase the uniform distribution of the material over the furnace cross section, the weight of the portion of the portion discharged to the corner station is additionally monitored, compared with the target and the weight of the subsequent parts is adjusted in accordance with the mathematical expression (Ck, J) m to  m to + j, m 1; P ; p - specified, actual and corrected5 15042536 Bathing set-angular full weight of U live tray; portions, unload- jd next women on the k-th M - Z m), unloaded angular position- portions tray settings I remaining k - orderly but actual measures angular weight- j station tray about m., - m - error value, M - load weight of the unloaded portion of my load th weight of the portion of the charge mana of the previous material.