CN1142295C - Antisticking device for oxygen gun for smelting steel in oxygen top-blown converter - Google Patents

Abstract

The present invention provides an antisticking steel device for an oxygen lance for smelting steel in an oxygen top-blown converter, which is characterized in that a stainless steel sleeve pipe matched with a lance body of the oxygen lance is manufactured and assembled in the position of the lance body of the oxygen lance, and steel can be easily stuck in the position. The accident of sticking the steel by the lance body of the oxygen lance is eliminated, the service life of the oxygen lance is prolonged, the operating rate of smelting steel is enhanced, and the cost for smelting steel is reduced.

Description

Antisticking device for oxygen gun for smelting steel in oxygen top-blown converter

What the present invention relates to that a kind of and the oxygen top blown converter steel making oxygen rifle body of a gun be complementary prevents body of a gun steel bonding device, is assemblied on the easy steel bonding of the oxygen rifle body of a gun position, in order to eliminate in steelmaking process the generation of oxygen rifle body of a gun steel bonding accident.

Oxygen top blown converter steel making, from nineteen fifty-two since Sweden comes out, in steelworks fast development all over the world, replaced openhearth steelmaking and side-blown converter steel-making very soon.The Japan's output of steel high speed development sixties in 20th century promptly has benefited from this.China at first introduced the top-blown oxygen converter of three 30 tonnes of nominal tonnages in 1964 at Shoudu Iron and Steel Co, after having tasted the sweetness, i.e. and the very fast development in the whole nation.At the beginning of the eighties, the Shanghai Baosteel for the development of China's output of steel and the raising of steel-smelting technology, has been made huge contribution from the large-scale oxygen top blown converter that Japan has introduced 300 tonnes of nominal tonnages.The current product steel of China is more than 100,000,000 tons, and wherein 90% is that top-blown oxygen converter refines.And oxygen top blown converter steel making, the oxygen rifle plays conclusive effect therein, and steelmaker author claims that the oxygen rifle is the heart of converter steelmaking, and the design of oxygen rifle and normal the use are the whole steel-making important steps that all one's life, production capacity was not carried out smoothly of decision.Its structure is that three diameter seamless carbon steel tubes inequality are nested and assemble.The oxygen rifle length of 120 tonnes of nominal tonnages reaches 17.3 meters, and weight reaches 2.76 tons.Pipe is an oxygen channel in three telescopic, and middle pipe is the water coolant water inlet, and outer tube is the water coolant water outlet.There are several covering devices its upper end, is connected with oxygen channel, joins with cooling water pipeline, join with transmission rig, and the lifting of transmission mechanism control oxygen rifle, its lower end is the de laval oxygen gun sprayer.This three sleeve pipe is the body of a gun of oxygen rifle.The task of water coolant is the cooling body of a gun and shower nozzle; water inlet therefrom pipe is exported from outer tube after arriving shower nozzle; the oxygen rifle inserts the import of converter; be that nitrogen seals; nitrogen seals in the converter flue corner; with the perpendicular place of converter medullary ray, effect is the dense smoke raging fire that sealing goes out from furnace injection, with the upper mechanism of protection oxygen rifle.During steel-making, the oxygen of the about 1Mpa of oxygen rifle internal pressure, shower nozzle ejects supersonic jet through the Lavalle, directive molten steel molten bath, make the molten steel strong agitation, C, Si, Mn, P, the rapid oxidation removal of S five big elements, temperature also by 1250 ℃ ± within 20 minutes, be raised to 1650 ℃ ±, in this process, barisal guns is rumbling in the converter, Dark smoke billows, molten steel flashes, the oxygen rifle is in such high temperature high oxidation atmosphere, among the molten steel slag that splashes, by the high pressure water cooling of 1Mpa with upward pressure, carry out blowing work, and come from the successful historical experience of practice and the accurate check and analysis of the lesson that has an accident, become the steel-making scientific law, design must not be strict with of the body of a gun and be higher than 45 ℃ by water temp; Molten steel spatters after the body of a gun, promptly can condensation anchor on the body of a gun, is difficult to melt come off again, and oxygen rifle body of a gun steel bonding accident has promptly taken place, and can more glue more greatly, and the blowing operation then is forced to stop.International and domestic each steelworks, oxygen rifle body of a gun steel bonding accident all takes place.Each tame degree varies of body of a gun steel bonding rate, general, mostly about 5%, and since half a century, the anti-steel bonding technology that does not but have success so far, handle the way of steel bonding accident, also only stop steel-making, the oxygen rifle is proposed nitrogen seal, manually slice off steel bonding with oxygen-acetylene, in case because steel bonding severity, in the time of can't proposing nitrogen and seal, then have at the nitrogen sealing part, the oxygen rifle is sliced off, scrap body of a gun bottom, and other renews rifle, handles the accident, the temperature height, flue dust is big, work under bad environment, each operation in the steelworks, even each system job program of all steel iron enterprise is all involved, Direct Loss and overall economic efficiency loss are all very big, so international and domestic steelmaker author is studying intensively meticulously, pay close attention to.There is patent in the U.S., sees (United States Patent (USP)) NO:3575706, and 1971.11.20, summary of the invention are oxygen supply rifle body of a gun lacquer special type refractory materialss.But, because technology is extremely complicated, and mainly be to bear collision, one to bump be broken promptly useless, do not implement the winner, applied, even to this day, and oxygen rifle body of a gun steel bonding problem, international and domestic never succeeding effectively solves.

Purpose of the present invention is exactly to eliminate oxygen rifle body of a gun steel bonding accident with the anti-steel bonding device of oxygen rifle top-blown converter steelmaking oxygen rifle, thereby improve the steel-making operating rate, prolong life-span of oxygen lance, reduce steel-making cost, increase the overall economic efficiency of iron and steel enterprise, reduce labor strength.

The present invention is a kind of antisticking device for oxygen gun for smelting steel in oxygen top-blown converter, the oxygen rifle is made up of the oxygen rifle body of a gun and oxygen lance blow head, the oxygen rifle body of a gun is nested by three different seamless carbon steel tubes of diameter and assembles, interior pipe is oxygen channel, middle pipe is a pipe in the water coolant water inlet, outer tube is a water coolant water outlet outer tube, it is characterized in that: it is a stainless steel sleeve pipe that is enclosed within oxygen rifle body of a gun outside, its length is the length at the easy steel bonding of oxygen rifle body of a gun position, wall thickness is 1-4mm, internal diameter is greater than the external diameter of the oxygen rifle body of a gun, and evenly has several welding pile holes on top, and it is firm that stainless steel sleeve pipe and the oxygen rifle body of a gun adopt the welding pile to hang.

Advantage of the present invention and effect: because antisticking device for oxygen gun for smelting steel in oxygen top-blown converter, feature is a kind of stainless steel sleeve pipe, be assemblied on the easy steel bonding of the oxygen rifle body of a gun position, prevent the mechanism of steel bonding, mainly contain three: the first, stainless characteristic is utilized, the fusing point height, intensity height, any surface finish, above molten steel splashes, be easy to come off automatically, the second, the assembling of the sleeve pipe and the body of a gun is not combined closely, so the cooling that sleeve pipe is subjected to weakens, its temperature is higher than body of a gun temperature, above molten steel splashes, is difficult for condensing.The 3rd, the sleeve pipe and the body of a gun have corresponding spacing, steelmaking process oxygen rifle produces severe vibration because of spraying oxygen at a high speed, make the body of a gun still also produce relative vibration bump with sleeve pipe, thereby steel bonding is shaken off at any time, these three kinds of effects are stored in one, the effect that prevents steel bonding then is sure, it digs the benefit of making and can calculate for example: 120 tonnes of top-blown oxygen converters of certain factory, and sticking rifle rate is 5%, the once sticking rifle of every processing, need 30-60 minute, after adopting this invention, sticking rifle rate is sure to be dropped to below 1%, presses average handling time and calculates in 40 minutes, 100 stove steel can be handled 4 times less, saved altogether 160 minutes, average smelting cycle calculated by every stove steel in 40 minutes, can refine 4 stove steel more, be that operating rate can improve 4%, this is a direct benefit, and for Steel Complex, concrete effect and comprehensive benefit are extremely considerable.Except that this most basic advantage, manufacture craft of the present invention is fairly simple, than lacquer special type refractory materials patent, not only economy but also reliable, it is frangible to bear collision than refractory materials, have again can not be through intending advantage.

Description of drawings:

Fig. 1-antisticking device for oxygen gun for smelting steel in oxygen top-blown converter synoptic diagram;

Fig. 2-antisticking device for oxygen gun for smelting steel in oxygen top-blown converter partial schematic diagram;

Among the figure, the 1-oxygen rifle body of a gun, 2-nitrogen seal, pipe, 13-oxygen channel in the anti-steel bonding device of 3-flue, 4-oxygen top blown converter steel making, 5-oxygen lance blow head, 6-converter, 7-molten steel molten bath, the 8-oxygen rifle body of a gun 1,9-pile hole, 10-stainless steel sleeve pipe, 11-water outlet outer tube, 12-water inlet.

A kind of antisticking device for oxygen gun for smelting steel in oxygen top-blown converter, the oxygen rifle is made up of the oxygen rifle body of a gun 1 and oxygen lance blow head 5, the oxygen rifle body of a gun 1 is nested by three different seamless carbon steel tubes of diameter and assembles, interior pipe is oxygen channel 13, middle pipe is for managing 12 in the water coolant water inlet, outer tube is a water coolant water outlet outer tube 11, it is a stainless steel sleeve pipe 10 that is enclosed within the oxygen rifle body of a gun 1 outside, its length is the length at the oxygen rifle body of a gun 1 easy steel bonding position, wall thickness is 1-4mm, internal diameter is greater than the external diameter of the oxygen rifle body of a gun 1, and evenly has several welding pile holes 9 on top, and stainless steel sleeve pipe 10 adopts the welding pile to hang the jail with the oxygen rifle body of a gun 1.

Embodiment, by accompanying drawing 1 as seen, the steel bonding position of the oxygen rifle body of a gun 1 is the bottom at the body of a gun, and be foundation with body of a gun external diameter and steel bonding span access location length, the stainless steel sleeve pipe of making 10 manually packs into after the body of a gun outer tube that will assemble, assembles the oxygen rifle more routinely, after treating that assembling finishes, at the casing pipe hole opening place of body of a gun select location, the welding pile is advisable to adorn firm sleeve pipe.When changing rifle, body of a gun outer tube that routinely need is cut off and sleeve pipe cut off and get final product.

Claims (1)

1, a kind of antisticking device for oxygen gun for smelting steel in oxygen top-blown converter, the oxygen rifle is made up of the oxygen rifle body of a gun (1) and oxygen lance blow head (5), the oxygen rifle body of a gun (1) is nested by three different seamless carbon steel tubes of diameter and assembles, interior pipe is oxygen channel (13), middle pipe is a pipe (12) in the water coolant water inlet, outer tube is a water coolant water outlet outer tube (11), it is characterized in that: it is a stainless steel sleeve pipe (10) that is enclosed within the oxygen rifle body of a gun (1) outside, its length is the easily length at steel bonding position of the oxygen rifle body of a gun (1), wall thickness is 1-4mm, internal diameter is greater than the external diameter of the oxygen rifle body of a gun (1), and evenly having several welding pile holes (9) on top, stainless steel sleeve pipe (10) adopts the welding pile to hang the jail with the oxygen rifle body of a gun (1).

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