SU840119A1 - Tuyere of blast furnace - Google Patents

Tuyere of blast furnace Download PDF

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Publication number
SU840119A1
SU840119A1 SU792823228A SU2823228A SU840119A1 SU 840119 A1 SU840119 A1 SU 840119A1 SU 792823228 A SU792823228 A SU 792823228A SU 2823228 A SU2823228 A SU 2823228A SU 840119 A1 SU840119 A1 SU 840119A1
Authority
SU
USSR - Soviet Union
Prior art keywords
tuyere
channels
furnace
lance
hearth
Prior art date
Application number
SU792823228A
Other languages
Russian (ru)
Inventor
Михаил Дмитриевич Жембус
Павел Яковлевич Мухин
Самуил Львович Голосинский
Анатолий Ильич Васюченко
Эрнест Николаевич Салий
Original Assignee
Институт черной металлургии
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Институт черной металлургии filed Critical Институт черной металлургии
Priority to SU792823228A priority Critical patent/SU840119A1/en
Application granted granted Critical
Publication of SU840119A1 publication Critical patent/SU840119A1/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/16Tuyéres

Description

The invention relates to ferrous metallurgy, namely, equipment for supplying a blast to a horn furnace. In blast fabrication, tuyeres are used that have a different design, geometrical dimensions and magnitudes of their working part protruding into the furnace. However, all the used constructions of the tuyeres do not provide the same intensity of the hearth operation due to the uniform distribution of air blowing over its section. When using conventional tuyeres, the oxidation zone is spread along the tuyere axis up to 1.5 m, to the side of the tuyere axis - by 0.25-0.44 m and extra h - Very little. The distance between the axes of the lances on modern furnaces (taking into account the height of 0.20-0.35 m) is from 1.2 to 1.5 m. This is about. At the same time, low active zones remain between the tuyere foci, the volume of which reaches 2% of the oy volume of the active zone of the hearth, which leads to a decrease in furnace productivity and an increase in coke consumption. When the quality of raw materials deteriorates, these disadvantages are aggravated and lead to disruption of the furnace and more intense burning of the tuyeres. - H-tangential tangential installation of tuyeres with the orientation of their outlet openings in one direction (clockwise or counterclockwise) J and f2. However, the ditch does not provide sufficient activation of the hearth. A blast furnace tuyere is also known. the parts are fixed on water-driven driving rods missed by shirt Z. The disadvantages of such a lance are the complexity and the high cost of its manufacture, since the lance body is large
384
not solid, but composite and has not one but three water-cooled parts, in the internal cavity of each of which it is necessary to supply cooling water and drain it. Thus, the lance has not two, as obshr, but six connections for the supply and removal of cooling water, which greatly complicates the operation and the process of replacement of the lances. The presence of movable salrik seals greatly complicates the already difficult conditions of operation of the tuyeres.
In addition, the ability to adjust the size of the gaps between the parts of the hull is difficult, and when pieces of coke get into these slots, the jams seize the hull. If it is necessary to increase the feed by blowing to the sides from the longitudinal axis of the tuyere, its consumption inevitably increases up and down and vice versa, i.e. The design does not provide effective control of the air flow.
Most close to the proposed technical essence and the achieved result is a blast furnace tuyere, supporting hollow water-cooled body, consisting of interconnected inner and outer glasses, bow and flange, and nozzles for supplying and discharging cooling water, which body it is equipped with a reflective partition dividing the flow of air blowing into two parts, one of which lies along the longitudinal axis of the tuyere, and the second - with an angle to it, including downwards.
However, it cannot provide a sufficient intensification of the hearth, due to the fact that not enough air is blown into the interfurm zones of the hearth's periphery.
The purpose of the invention is to increase the productivity of the blast furnace and reduce coke consumption by intensifying the periphery of the hearth.
This goal is achieved by the fact that in a known blast furnace tuyere containing a hollow water-cooled body, consisting of interconnected inner and outer glasses, a bow and a flange, and pipes for starting and discharging cooling water in the body at an angle of 25-60 to the longitudinal axis of the tuyere, channels are made, preferably on one side of it, the total cross-sectional area of the channels is equal to OD-O, 2 transverse sections of the central channel cross-section, the cross section of each channel can be
94
reduced in length from the inner cup to the outer one, for example, in the form of a conical nozzle, and the forming channels of the channels can take the form of a curve or broken line, for example, the channels can be made in the form of Laval nozzles.
Such a design of the tuyere allows to direct part of the air blow (up to 20%) to the interfurm zones of the horn periphery and down from the tuyeres, which ensures an even distribution of the blow over the whole section of the hearth.
FIG. I depicts a lance with channels and an internal conical glass, general view; in fig. 2 - a lance with channels and an inner cup, made in the form of a venture pipe, general view.
The blast furnace tuyere contains a hollow water-cooled body consisting of. interconnected inner I and outer 2 cups, nose 3 and flange 4, to which are connected nozzles 5 and 6, which serve respectively for supplying and discharging cooling water. Channels 7 are made in the body of the tuyere; they are cylindrical, conical or other shaped pipes 8, passing through the water-cooled cavity 9 of the tuyere body and rigidly connected to the inner and outer cups I and 2, for example, by welding. Channels 7 are made at an angle of 25-6 ° to the longitudinal axis of the tuyere in the direction of air flow blowing. The total cross-sectional area of the channels 7 is made 0.1-0.2 of the cross-sectional area of the central channel 1O. Channels 7 may have a decreasing length from the inner cup I to the outer 2 section, and their forming elements may have the shape of a curve or a broken line. All channels 7 can have both identical and different cross sections.
A mole of inclination of the channels to the axis of the tuyere 25-6О ° is caused by the fact that angles less than 25 ° do not provide the necessary part to blow into the low-active zones of the forge and the operation of such a tuyere does not
the desired effect, and angles greater than 60 ° are brought (taking into account the angle of
jets) to feed the part to blow directly to the periphery of the hearth, which may cause the height of the lining and cooling devices.
The flow through the channels 1O-20% of the blow is due to the volume of low-active zones of the forge located between the tuyeres and partially under them.
The channeling in the form of conical nozzles, or in the form of Laval nozzles, allows to increase the speed and energy of the jets emerging from them, which contributes to the better development of low-active zones of the hearth.
During the operation of the tuyere, a stream of hot blowing is supplied through the central channel IO, somewhat smaller than in conventional tuyeres of the cross section. Reaching channels 7, the flow is dismembered and part of the blowing is directed into the interfurm zones and down. At the same time, through channels 7, 10–20% of the blow is discharged. Through% pipe 5, cooling water is continuously supplied to the internal cavity 9 of the tuyere body, which is discharged through pipe 6. When the internal glass I is filled in the venturi tube (figure 2), the narrowing of the glass creates a flow to blow. additional resistance that contributes to its dismemberment.
The use of the proposed tuyere makes it possible to rationally distribute the gas flow and increase the degree of use of its reducing energy, which increases the productivity of the furnace, reduces the consumption of coke and reduces the burning of the tuyeres. Activation of the low-active zone of the hearth allows the furnace to increase its productivity and, accordingly, reduce the coke consumption.
/

Claims (4)

  1. Invention Formula
  2. I. A tuyere of the furnace furnace containing a hollow water-cooled body consisting of interconnected inner and outer cups, bow and flange, and a test tube for supplying and draining water, so that it is In order to intensify the work of the hearth periphery, in the case at an angle of 25-6 ° to the longitudinal axis of the tuyere, the channels are filled, the total cross-sectional area of which is equal to RD-O, 2 cross-sectional area of the central channel. 2. The lance according to claim I, about t and d and with t & l, that the channels are filled with decreasing in the form of conical nozzles
  3. 3. The lance according to claim 1, distinguishing that the channels are made in the form of Laval nozzles.
    Sources of information taken into account when
    1. US patent number 2124437, CL. 75-41, 1938.
    2. Metallurgical and mining industry. 1976, No. 4, p. 6-8.
    3. USSR author's certificate number 610868, cl. From 21 to 7/16, 1978 ..
  4. 4. US patent nd 3350О84, cl. 266-41, 1967.
SU792823228A 1979-09-25 1979-09-25 Tuyere of blast furnace SU840119A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU792823228A SU840119A1 (en) 1979-09-25 1979-09-25 Tuyere of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU792823228A SU840119A1 (en) 1979-09-25 1979-09-25 Tuyere of blast furnace

Publications (1)

Publication Number Publication Date
SU840119A1 true SU840119A1 (en) 1981-06-23

Family

ID=20852153

Family Applications (1)

Application Number Title Priority Date Filing Date
SU792823228A SU840119A1 (en) 1979-09-25 1979-09-25 Tuyere of blast furnace

Country Status (1)

Country Link
SU (1) SU840119A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432534A (en) * 1982-02-10 1984-02-21 Institut De Recherches De La Siderurgie Francaise Oxygen lance for steel converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432534A (en) * 1982-02-10 1984-02-21 Institut De Recherches De La Siderurgie Francaise Oxygen lance for steel converter

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