RU31578U1 - CAST IRON BLAST FURNACE - Google Patents

Description

Cast Iron Lettuce Blast Furnace

Pelezny model refers to ferrous metallurgy, and iw.eHHo to equipment for the furnace of a blast furnace.

Known cast-iron notch of a blast furnace in the form of an opening in the wall of the hearth above the dead layer, having a rectangular shape with dimensions in bright light, width 300 mm and height 500 mm, and the intake section of the chamotte brick masonry is placed in carbon blocks. The forge of a hearth of a cast-iron ledge is reinforced with a steel frame welded to the casing, the inner surface of the frame that covers the body of the flight hall of the odnilnikov is lined with fireclay bricks, forming an oval, arch / cm. Begman, B.N. Zhere.bi: n, A.N. Pohvionev: Well. M9taylurgy cast iron. -M ,: Metallurgy.-1d78.-S.ZoO, Fig. 163 /. Before starting the furnace, the lettuce channel in the hearth wall is filled tightly with the case mass, the cavity inside the arch is filled with the case mass, making the case. In the Case, the case for the gun sock and the cylindrical channel of the lettuce are cut with cutters, then the case is dried with a gas gun. during operation of the furnace, the case of the cast-iron lettuce is disassembled and made according to the schedule or immediately if it is in poor condition / cm. . Kichko, 1T.G. Polovchepko. cast iron lettuce of a blast furnace and care for it.-Kharkiv: Metallugizdat, -19Zh.-S, 29.44-48. M.Ya. Ostroukhov, L.YALPparber. Operation: -1nd blast furnace.- M.: Metallurgy.-1975.-S.147 /.

IPC 21 to 7/12

HHse technical result when using the well-known Leto, relative:

- short-term service of the case / 2r-g5 days when using anhydrous lenticular mass: see M.V. Gogov, S.V. Golubkov, E.F. Shkurko and rtp. FREE-free pulp mass for closing a cast-iron plate of a domenio furnace // Bul. NTI Ferrous metallurgy.-1984.-f 23.-S.34 /,

-work on restoration of the masonry of the arch during its destruction due to the unsatisfactory condition of the Case,

- manual disassembly operations for the manufacture of the Case / stuffing, cutting out the case and the channel of the letok /, - air pollution by emissions of combustion products

gas burned: KI drying tap hole and volatile coal

„. ,,

cantle of the case, mass / pitch content in the case mass is 6-14: - volumetric-cm: B.N. Serebin. The practice of maintaining a blast furnace. : Metalsurgery, -l980.- P.25 /, as well as from burning of furnace gas from the leak of the Case.

Known cast iron lettuce blast furnace, the frame of which is cylindrical, and the walls of the frame with a flange enclosed in. high alumina packing on an anhydrous ligament. The thickness of this nabili internal frame, replacing kirt-1Chnoy arch, is 0.2-0.5 of the width of the channel of the frame. The case about the case socket “flax of the gun’s nose is made of a case mass in the form of a truncated cone / cm. av.tg. testimonial. USSR R 1523571, class C 21 V7 / 12, 1984 /.

the reasons that impede the achievement of the technical result indicated below when using a well-known fly, as with the above analogue, include the short-term service of the case, a significant amount of manual labor in the manufacture of the case, and atmospheric pollution by gas Vybrosbshi,

A cast-iron lettuce of an exchange furnace is known, the frame surface of which is coated with refractory material on the side of the case with the formation of a central channel in a truncated cone, flattened in the horizontal plane and expanding to the central axis of the removable furnace in the vertical plane, and the a-piece of the lettuce is made of pulmonary anhydrous ligament / cm. Utility model KU No. 20653, class 21 V 7/12, 2001 /.

To p1) the reasons that impede the technique indicated below; ches, the result when using the famous flyets include:

-difficulties with the manufacture of the Hard Case, since at 6O80 ° C the mass opens up and is squeezed out of the RPG under the tool for stuffing,

-applied anhydrous flow masses on coal tar, including those with added pitch, pollute the atmosphere, since the plasticizer contains up to 1.5% benzapyrene / cm. N.V. 11 So, R.M., Fedorchuk. Khoruzhiy to rtP. differentiated use of refractories in the blast furnace. blast furnaces // Refractories and technical ceramics, -1998.-i ll.-e.35 /, drying (the rutlyar is accompanied by the release of volatile binder and products of the burning of hot-water blast furnace, ..

100Y Uyo

- after drying, the summer mass has a porosity of about 33 /, which does not exclude the emissions of the hearth: gas

and weakening the case.

The closest in technical essence and the achieved effect to the claimed device is a cast-iron lettuce of a blast furnace, the construction of which in order to simplify the lining of the hearth and increase the resistance of the channel and the last is made in carbon blocks of the wall of the hearth s in the form of a drilled hole with a diameter of 80-100 mm. drilling of carbon blocks is carried out after the completion of the furnace hardening and the manufacture of and:; The well-known summer can be performed both during the construction and repairs of the first, second and third quarters: that allows you to arrange several cast-iron summers on the same blast furnace without capital costs for the reconstruction of the masonry furnace. It is recommended that the clogging of the channel of the well-known cast-iron fly lead anhydrous summer mass / cm, ed. certificate, USSR P889708, yut, C 21 V 7 / 12.1981 /, adopted as a prototype,

The reasons that impede the achievement of the technical result indicated below when using a well-known keyhole include the fact that the frame of a cast-iron head is per U UU: iO.-or

arched top and stuffed from case mass, coal tar pitch content. The case for the gun’s toe and the lettuce channel in the case are cut out manually, the case is dried with a gas burner, FC: volatiles are emitted for drying - pitch and combustion products of gas. The surface of the letok channel is not a joker. has a strict cylindrical shape due to its manual cutting When moving the drill in the notch channel in e) a drill for drilling holes in the carbon blocks of the hearth wall on the surface of the notch channel in the case, chips and cracks are formed that increase when the first cast iron expires . The lining of the frame is not permanently sealed, which is the case with E: it leads to the release of furnace gas from the furnace, the resistance of the case when closing the insulator with an anhydrous, volatile mass is about 30 days., The case is disassembled to make a new one on a working furnace under conditions of emission of volatile chute mass and combustion gas and heats from the case, the armor and the main gutter.

The usefulness of the utility model is to improve working conditions in the manufacture of the lining of the ramg of cast iron lettice by simplifying the manufacture and maintenance of it,

The technical result is a decrease in the gas permeability of the lining of the frame, and the formation of cavities of the case socket and the channel of the letlet in the case without waste refractory material, prevention of the formation of defects refractory material of a.autl.yar during drilling of a channel and holes in carbon blocks of a hearth wall and crack formation in the case caused by the sharp thermal effect of liquid cast iron of the first release, reducing emissions of harmful substances into the atmosphere, decreasing fuel consumption for drying the case ..

the technical result indicated. in the implementation of a useful model is achieved by the fact that in a well-known cast-iron lettuce of a blast furnace containing a frame connected to the casing of a furnace placed on refrigerators, a housing made of refractory material with the formation of a canopy socket for the gun’s nose and a channel, letters, and the channel the holes in the carbon blocks of the hearth wall are made in the form of a drilled hole with a diameter of 80-100 8vM, the feature is that the KZ case

bulk refractory beton adjoins the surface walls of the frame. In addition, the lettok channel in the case is formed by a metal cylindrical pipe with an inner diameter of 80-100 mm and the cavity of the metal pipe and the cavity of the drilled hole in; - the carbonaceous bL: Okah have a common longitudinal axis.

The execution of a case of bulk refractory concrete having an open porosity of about 17 and tightly adjoining the frame is practically exhausted. The furnace gas is emitted through the frame lining / at h :: 1kpluatatsky it is known that there is a cast-iron groove between the arch to the frame, the arch and the casing massFJ with loss calcination at about 45 / S, leaks occur - paths for the release of furnace gas /

Bulk concrete allows the cavity of the case socket and the channel of the letok in the case to be made using well-known methods of using templates without waste refractory material with minimal manual labor, a metal pipe placed in the case when moving the drill for drilling the channel: a L; butts in carbon with 5

solid blocks, protects concrete from damage and acts as a conductor, providing oooonoot sections of the channel letoki in the case and blocks. At the first, production of cast iron, the pipe protects the concrete from contact with the 2-molten AO iron of the decompression of its metal, preventing crack formation in the loaf from its sharp heating, reduction of harmful emissions into the atmosphere when using the utility model due to the fact that

the case is made without pitch, drying, the case is necessary for the construction of k; ... major repairs of the first, second categories. In the manufacture of the case for the overhaul of the third category, which is repeated most often during the furnace campaign, fuel consumption for drying is not required: Case: within 12-16 hours, the refractory concrete is dried by the heat accumulated by the furnace structures and its contents. In addition, the reduction in the manufacture of a case mass with pitch DD: I manufacture a case of a cast iron plate reduces atmospheric pollution. It is also a part of the preparation of refueling materials for the blast furnace shop.

In the drawings, set:

-o; ig.1 - cast iron notch of a blast furnace, longitudinal section, view after drilling a channel, notches in carbon blocks,

-Fig, 2- identity, view after closing the first release of cast iron.

After the construction, during the construction, repairs of the first and second categories, the flight .1 / contains the frame i connected to the casing 2 of the horn, HOSHODILBNYKI 3, the case 4 from bulk refractory concrete adjacent to the frame 1, the case 5, a metal pipe with an inner diameter of 80-100 mm, forming a lettok channel in a case 4, a lettuce channel 7 in the form of a drilled hole with a diameter of 80-100 mm in carbon blocks 8 with a longitudinal axis 9, common with the pipe cavity 6.

Cast iron Eeya summer / a and city 2 / works in the way, frame 1 reinforces the casing 2, protects the refrigerators 3. Case 4. protects the frame from choyoya and slag during the release of cast iron, azutlary gnezhe.oz much 5 provides coupling of the gun sock / not shown / with the channel of the taphole at its closure. When you open the first ductile iron, a metal pipe b protects the Futlnra concrete from contact with cast iron until the pipe melts, which prevents crack formation in concrete. By melting the pipe in the case, a channel 10 of the letok is formed. When closing the letok with a cannon, the anhydrous flying mass of c. Lakes sections 7 and 7 of the notch channel, then the opening of the lettuce is performed using a drill with a diameter of 65 mm. Cast iron releases are produced by hafik.

A case made of jalivny refractory concrete provides a many-month service. Its re-manufacturing is carried out on ifapital repair of the third category.

Concrete drying is provided by the heat accumulated in the furnace.

simplification of frame lining operations, increase of case service life, reduction of atmospheric emissions improve working conditions.

Claims (1)

A cast-iron notch of a blast furnace containing a frame connected to the casing of the forge placed in refrigerators, a case of refractory material with the formation of a canister for the gun’s nose and a notch channel, the notch channel in the carbon blocks of the furnace wall made in the form of a drilled hole with a diameter of 80-100 mm, characterized in that the case of bulk refractory concrete is adjacent to the surface of the frame walls, and the notch channel in the case is formed by a metal cylindrical pipe with an inner diameter of 80-100 mm and a cavity of the metal pipe and the cavity of the drilled hole in the carbon blocks have a common longitudinal axis.