CN2367619Y

CN2367619Y - Blast tuyere small-sleeve of fine ceramic double-chamber reverse-flow type

Info

Publication number: CN2367619Y
Application number: CN 99232709
Authority: CN
Inventors: 蔡晓明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-01-26
Filing date: 1999-01-26
Publication date: 2000-03-08
Anticipated expiration: 2009-01-26

Abstract

The utility model relates to a blast tuyere small-sleeve of a fine ceramic double-chamber reverse-flow type. The utility model is characterized in that an outer casing body is combined with an inner chamber body into integration, and thus, a water chamber is formed; an inner water chamber formed by a separation sleeve and a catchment gusset plate is arranged in the water chamber, and after high-pressure cooling water enters the inner water chamber from a water inlet and speed is changed, via the catchment gusset plate, a diffusing type high-pressure turbulence water cycle heat exchange system is formed. The utility model has the advantages of shock resistance and low cost of materials; the service life of a tuyere for being used in a furnace is increased greatly, the time for exchanging air of a blast furnace is reduced, smelting benefit is obtained, and the cost of the tuyere can be reduced.

Description

Fine ceramics two-chamber return-flow type tuyere small sleeve

The utility model relates to a kind of iron-smelting blast furnace and uses the air port, particularly a kind of fine ceramics two-chamber return-flow type tuyere small sleeve.

Tuyere small sleeve stretches into to undertake in the stove as iron-smelting blast furnace and blows hot blast, sprays coal dust, strengthens the crucial spare part smelted, and it is interior up to 6.7-10 * 10 that requirement itself wants to bear stove ⁶KCal/m ²Machinery and electrochemical conditions in the stove that the heat-flash stream of h impacts and adaptation pyrotic smelting state is complicated down.At present, all generally adopt metallic copper as the air port material both at home and abroad, realize the heat-flash transmission with middle and high setting-out in the air port body-internal-circulation, so it selects copper air port for use, key is to utilize the relative high thermal conductivity of copper to strengthen exchange to heat, avoids the high temperature scaling loss in air port itself.Improved heat transfer boundary condition by changing water-cooling pattern modern age in smelting industry; Spray or the copper not wear-resisting defective of edge wear-resistant sleeve improvement by the air port inner chamber, purpose all is to improve the air port to obtain the ironmaking benefit in the stove life-span, but because the copper mechanical property own and the limitation of the type of cooling, it is not remarkable to produce effects.

The purpose of this utility model is to provide that a kind of cost is low, the life-span long, can improve the iron-smelting blast furnace tuyere small sleeve of smelting benefit.

The purpose of this utility model realizes in the following manner: fine ceramics two-chamber return-flow type tuyere small sleeve, its body skin 2 is combined into integral body with lumenal body 1 in concavo-convex full rim of the mouth mode, form water cavity 3, separation sleeve 4 is loaded on water collection sheet support 8 is close to lumenal body 1 inwall in the water cavity 3, water cavity 9 in forming, interior water cavity 9 upper openings tap into the mouth of a river 10 formation intake antrums 6 after connecting with water inlet box 5, water collection sheet support 8 is equipped with in the bottom, water cavity 7 and connect before having waist type loudspeaker jet orifice to connect in the water collection sheet support 8 with water cavity 3, the cover inner conical surface matches in the body skin 2 major part conical surfaces and the air port, and lumenal body 1 end face matches with coal powder injection air pressure gun system spherical flange.All part is by fine ceramics (r-AL ₂O ₃) one is burnt till after the high-temperature plastic combination.Its type of cooling is that medium-pressure or high pressure water is by water-in 10 water cavity 9 in the intake antrum speed change enters, the form that uniform waist type loudspeaker jet orifice becomes the high-voltage high-speed turbulent flow in water collection sheet support 8 is impacted shell 2 intrados again, enter water cavity 3 through preceding water cavity along body skin 2 inwalls, in a looping fashion heat is taken out of by water outlet 11, finished the pressure heat exchange.Its material: with (r-AL ₂O ₃) fine ceramics that burns till is the air port material, self fusing point and refractoriness under load are higher than smelting temperature in the stove substantially, and comprehensive mechanical performance and stable chemical properties adapt to complex conditions in the stove fully, and high rigidity can be resisted the friction of high speed powder.

The utility model is by unique two-chamber backflow water-cooling pattern and the over-all properties of self, can bear the etch of chemical element during heat-flash stream impacts and stands to smelt in the stove in the stove, and melting loss in early days not, inner chamber need not spraying or inlays nonmetal wear-resistant sleeve, and the impact of directly bearing hot blast and coal dust, water-cooled and heat exchange mode can be rich in the auxiliary tuyere shell in leeway and the interior heat-flash of front end raising stove flows ballistic ability to bear, it improves the air port very significantly in the stove life-span, thereby reduce the furnace body wind time, obtain the smelting benefit, the cost of material is low for it, replaces noble metal copper, manufacturing process is simple in batch, reduces the air port priming cost.

Accompanying drawing has provided embodiment of the present utility model:

Fig. 1 is the utility model structural representation;

Fig. 2 is the B-B sectional view of Fig. 1;

Fig. 3 is the C-C sectional view of Fig. 1;

Fig. 4 is water collection sheet support front view;

Fig. 5 is the A-A sectional view of water collection sheet support.

With reference to the accompanying drawings the utility model is described in further detail:

With reference to Fig. 1, the utility model is by lumenal body 1, body skin 2, separation sleeve 4, water inlet box 5, water collection sheet supports 8 five parts and forms, body skin 2 and lumenal body 1, be combined into integral body in concavo-convex full rim of the mouth mode, form water cavity 3, separation sleeve 4 is loaded on water collection sheet support 8 is close to lumenal body 1 inwall in the water cavity 3, water cavity 9 in forming, interior water cavity 9 upper openings tap into the mouth of a river 10 formation intake antrums 6 after connecting with water inlet box 5, water collection sheet support 8 is equipped with in the bottom, with reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5, water collection sheet support 8 is a circular ring structure, be evenly equipped with on it eight waist type loudspeaker jet orifices 12 connect before water cavity 7 and connect with water cavity 3, overlap inner conical surface in the body skin 2 major part conical surfaces and the air port and match, lumenal body 1 end face matches with coal powder injection air pressure gun system spherical flange.The whole parts of the utility model are by fine ceramics (r-AL ₂O ₃) one is burnt till after the high-temperature plastic combination.

Claims

1. fine ceramics two-chamber return-flow type tuyere small sleeve, it is characterized in that: body skin [2] is combined into integral body with lumenal body [1] in concavo-convex full rim of the mouth mode, form water cavity [3], separation sleeve [4] is loaded on water collection sheet support [8] is close to lumenal body [1] inwall in the water cavity [3], water cavity [9] in forming, interior water cavity [9] upper opening taps into formation intake antrum [6] in the mouth of a river [10] after connecting with water inlet box [5], water collection sheet support [8] is equipped with in the bottom, water cavity [7] and connecting before having waist type loudspeaker jet orifice to connect in the water collection sheet support [8] with water cavity [3], the cover inner conical surface matches in body skin [2] the major part conical surface and the air port, and lumenal body [1] end face matches with spray stand coal air pressure gun system spherical flange.

2. fine ceramics two-chamber return-flow type tuyere small sleeve according to claim 1 is characterized in that: all part is by fine ceramics (r-AL ₂O ₃) one is burnt till after the high-temperature plastic combination.