RU29304U1 - Blast furnace air lance - Google Patents

Abstract

1. An air lance of a blast furnace, including a steel flange hermetically connected together, an inner and outer copper, cups and a copper toe, the inner surfaces of which form a blast channel, to which a gas supply pipe is connected, and the inner surfaces of the copper sock are made with a stepwise change in the diameter of the blast channel with a ratio of 0.6-0.95 minimum d and maximum d diameters of the blow channel in the place of a step change in its diameter, the conjugation of the inner surfaces of different diameters of copper The piece of lumber at an angle of 70-110 ° and remote from the end face of the sock on the copper 0,1-0,18 length blast channel, characterized in that the part of the flange portion and the inner cup are provided with a layer of refractory teploizolyatsii.2. The blast furnace air tuyere according to claim 1, characterized in that the layer of refractory thermal insulation is bounded on the tuyere by the surfaces of the flange and inner cup, and on the blast side by a cylindrical surface of diameter d and a plane perpendicular to the longitudinal axis of the tuyere from the side of the copper toe, as well as a surface that continues the spherical surface of the sample in the flange under the nose of the nozzle of the tuyere device, and the layer of refractory thermal insulation has a length, where l is the distance between the axis of the outlet of the gas supply tube and the edge in Borky flange under sock nozzle, d- outer diameter of the gas supply tube.

Description

2001 125 105

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EXCEPTIONAL FUR11 DAILY FURNACE

The invention relates to black metasurgery, in particular to the equipment for the injection of blast into a blast furnace together with the addition of TOLL.

1B: it is airborne. A lance tuyere with a blast channel of variable voltage. a transverse section in the upper part of which a natural gas supply tube is inserted at a reciprocal angle to the flow of blast / cm. Author's certificate of the USSR B 370237, class, with 21 B7 / 16, 1974 /.

The disadvantage of a known device that impedes the achievement of the technical result indicated below is that. during operation, its gas supply pipe burns out, which saves coke, the lance has significant losses: heat and cool it with water.

The closest device of the same purpose to the claimed invention, but the combination of features is an air lance of a blast furnace including a steel flange tightly interconnected, an inner outer cup and a nose of € 1K, the inner surfaces of which form a blast channel, G: with which the gas supply is connected tube, and the inner surfaces of the copper toe are made with a step change in the diameter of the blast channel with otnompk from 21 to 7/16

diameter: in the blast channel in the place of a step from a change in its diameter, interfacing the inner surfaces of different decameters of the copper toe at an angle of 70-110 and distant from the end surface of the copper toe by 0.1-0.18 lengths of the blast channel / see, patent of the Russian Federation No. 2150511, class 1 C 21 V 7 / 16.1999 /, adopted as a prototype.

To the Cause that impedes the achievement of the technical result below when using a known lance is that; The tuyere has significant heat losses with cooling; waiting water, which leads to a lower positive effect of improving the mixing of natural / coke oven gas with blast due to the construction of the tuyere toe,

The purpose of the invention is to reduce: heat loss of hot blast in a tuyere while maintaining the burning effect of lubrication of natural / coke oven gas with a blast having © in the tuyere prototype.

Technical result - below: more heat loss of hot blast with cooling water. Less than coke consumption for pig iron smelting

specified tehni; the same result is achieved by that. CH.TO in a well-known air lance stove and blast furnace, including her tightly connected between. a special steel flange; inner flange; outer clinker cups; and HCSCOK copper, inner flange: which must be objec

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1 ()) by changing the diameter of the blowing channel with the ratio Oub-095 mzhimimalnoy. The maximum diameter of the blower channel in the MEAT® is a step change, diameter, the conjugation of the internal surfaces of different diameters of the copper toe is removed at an angle of 70-110 and is removed from the end surface by about 18 holes of the blow channel, a feature is vol., that part of the flange of the tank and part of the inner glass are equipped with words of refractory heat insulation. Features The claimed device is also that the heat-resistant heat insulation is limited on the tuyere by the surfaces of the fajazh and the inner side of the channel, and on the blast side it is cylindrical: the surface of diameter d, TS. with a flatness perpendicular to the milked coolant (the room located on the side of the copper wire, and also the surface extending spherical: the sampling surface; in (gjEEHne under the nose of the tuyere nozzle a, I will add, the layer of refractory thermal insulation l pc / g has a length,. t- jGD6, - the distance between the axis of the outlet of the gas supply tube and the sampling edge in the flange under the nose of the nozzle a, and - the external gas supply jamater B: b; th tube ,. The reduction of heat loss with cooling tuyere water is achieved by direct contact direct contact hot blast with internally m glass at the site of the placement of the layer of refractory heat-insulating resin, the drawing shows a longitudinal section of an air tuyere of a blast furnace.

Tuyere incl. Aat steel o genets i ,, copper outdoor

glass 2, copper inner glass 3 ;, copper 4 gas-supplying tube 5, -output, hole G with which soy.dcn-chot cavity gas-supplying tubes c. blast.vM, canoe 7, cjEofiS 8 fire-resistant heat-insulation, located on the inner surface of the flange of anza 1 and inner cup. 3, note: ol) Oh 8 refractory heat insulating from the side of the blown Canadian 7 is bounded by a ji-ndrch surface: C1: f 9 diameter H, has a length, gD®

 -distance between oyyz 10 of the outlet b of the gas supply 5 and the edge and spheritasko sample: 13 VO: fyantse 1 nozzle nozzle fuomannogo when dr - HC (i) and a pair of gas supply Я и e1 7f.ydKu ,, sock 4 at a distance o, 1-0 , 18 for the length of the blast channel from the end of the toe, a stepwise change is made less than the blast channel of the lance, moreover, the ratio between the minimum diameter of the channel and the maximum in diameter is 0.6-0.95, the conjugation of the blower channel is inside; The tuyere codec is made at an angle of 70-110 °.

The air lance works in an ad-hoc manner, the installation of it in the lance at the end of the lance; with a lance of natural, coke, cooling. Half of the blown furnace blast through i enters from sopzh to dut: 8Voy channel 7, where from the gas; a supply stream 5 through the outlet 6 introduces a gas stream and goes to the outlet: into the tuyere tip. Vme; step speed change

4

of the diameters of the blower channel of the tuyere in the medical unit ШГ.ОЯ 8 of the refractory heat-insulating material, they are known for the hot IOKI1 ,. METHODS for mixing gas with a hedgehog. on the subject of early morning attack 3, aHacJffie.HH & TO with 8 refractory thermal insulation., um.pushyayu / teya hold jRfssa hot DUTY compared to G tesgopoteryamg, I press. IMK; place in suey; ae; ezhzhzhuatatsii: proto ty wa.

 Thus, the application of the invention reduces the consumption of coke for smelting cast iron.

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Claims (2)

1. An air lance of a blast furnace, including a steel flange hermetically connected together, an inner and outer copper, cups and a copper toe, the inner surfaces of which form a blast channel, to which a gas supply pipe is connected, and the inner surfaces of the copper sock are made with a stepwise change in the diameter of the blast channel with a ratio of 0.6-0.95 of the minimum d ₁ and maximum d _{2 of the} diameters of the blast channel in the place of a step change in its diameter, the conjugation of the inner surfaces of different diameters is copper of the toe at an angle of 70-110 ° and distant from the end surface of the copper toe by 0.1-0.18 of the length of the blast channel, characterized in that part of the flange and part of the inner glass are provided with a layer of refractory thermal insulation. 2. The air tuyere of a blast furnace according to claim 1, characterized in that the layer of refractory thermal insulation is limited on the tuyere by the surfaces of the flange and the inner cup, and on the blast side by a cylindrical surface of diameter d ₁ and a plane perpendicular to the longitudinal axis of the tuyere from the side of the copper toe, and also a surface extending the spherical surface of the sample in the flange under the nose of the nozzle of the tuyere device, and the layer of refractory thermal insulation has a length

, where l ₁ is the distance between the axis of the outlet of the gas supply tube and the edge of the sample in the flange under the nozzle nose, d _g is the outer diameter of the gas supply tube.