CN101250600A - Blast furnace atomization tapping technology - Google Patents

Abstract

The invention discloses a blast furnace atomization tap hole technology, which is characterized in that the water inlet pressure is 0.05-1 MPa, water yield is 1-10 L/min, water outlet pressure is 1-6MPa, air pressure is 0.4-0.6MPa, air quantity is 4-6 cubic meter/min, a water inlet pipe and a water outlet pipe are stainless steel seamless pipes whose outer diameter is 22 mm, and wall thickness is 3mm. The blast furnace atomization tap hole technology of the invention atomizes high pressure water and high pressure air under high pressure to form high pressure atomized water, directly sprays water-stem through a drill rod and a drill head of a blast furnace tap hole machine, guarantees to continuously give excellent cooling for the drill rod and the drill head in the drilling process of the tap hole machine, reduces the abrasion of the drill rod and the drill head, and decreases the consumption of the drill rod and the drill head. Water-stem which is about to be drilled is cooled down through directly spraying high pressure atomizing water on the water-stem, water-stem with high temperature is burst, which is beneficial for the drilling of the drill head, can guarantees to open the tap hole on time (usually within three minutes), prevents the stewing phenomenon, thereby not only effectively preventing the danger of the burst generation of tap hole, but also preventing iron water from reversely flowing, and guaranteeing the safety and the real-time of the blast furnace tap water.

Description

Blast furnace atomization tapping technology

Technical field

The present invention relates to production technology, especially blast furnace atomization tapping technology that a kind of Steel Plant produce the blast furnace that iron and steel uses.

Background technology

Produce in the iron and steel domain in Steel Plant, blast furnace is important ironmaking equipment, all will adopt taphole drilling machine to beat tapping outlet before the State of Blast Furnace, and molten iron is flowed out from the blast furnace bottom smoothly.Along with the development of blast furnace iron-making process, the blast furnace taphole trend degree of depth is darker, and stemming is harder, heat is more; Particularly for the blast furnace that adopts two iron mouths, because two iron mouths are opened in turn and put molten iron, the timed interval prolongation (having prolonged one times time basically) that each iron mouth is opened and puts molten iron causes stemming hardening, tapping outlet difficulty.Above-mentioned situation has produced some problem, and 1, performance of taphole drilling machine etc. is had higher requirement, even the performance of taphole drilling machine can satisfy the requirement of opening, but the consumption of drill bit, drilling rod etc. increases greatly, increased ironmaking cost; If 2 can not beat tapping outlet on time, just be easy to generate stewing stove phenomenon; If 3 reduce the hardness of stemming, make the stemming deliquescing, stemming just might seal incessantly iron mouth, and this situation must be avoided; And if the hardness of raising stemming makes the stemming hardening, just can not beat tapping outlet on time, if do not open for a long time, just easily stewing stove influences the rhythm of production of blast furnace or forces blast furnace stopping, causes certain loss; So improve from the hardness equal angles of stemming merely, can not play effect equally.

And in the blast furnace atomizing blow device of the prior art, as name be called " the hydraulic atomized blow device of blast furnace open hole machine ", the patent No. is the disclosed technical scheme of Chinese utility model patent of ZL200620096709.7, the atomizing blow device that has housing, end cap, vibrating rod, impact pad, gear unit, seal assembly etc. to constitute is disclosed, part heat when this device can be taken away work, the drill bit that gos deep into the iron mouth can be cooled off timely, prolong its working life.But, the parameters such as pressure, flow of water coolant and gas are not provided in this application file, in actual use,,, just be easy to generation and burst in case water coolant contacts in a large number with the pyritous molten iron if the water coolant after the atomizing is too many, abnormally dangerous; And if the water coolant after the atomizing very little, in case after the iron mouth is drilled, can not prevent that again molten iron from flowing backwards, and exists potential safety hazard equally.Simultaneously, hypertonia or low excessively, all directly effects of influence atomizing blow device, the cooling water inflow that hypertonia is then brought into increases, exist to be easy to generate the danger that bursts, and if hypotony does not then have the effect of purging, the high hot dust that produces when making drill bit work can not in time be drenched, and can not prevent that molten iron from flowing backwards.

Summary of the invention

The blast furnace atomizing that the present invention is directed to prior art purges, the above-mentioned deficiency of blast furnace atomizing tapping outlet, provides a kind of simple to operation, can prevent effectively that the iron mouth from producing the danger that bursts, can prevent the blast furnace atomization tapping technology that molten iron flows backwards again.

Technical scheme of the present invention: blast furnace atomization tapping technology is characterized in that: intake pressure 0.05-1Mpa, aquifer yield 1-10L/min, discharge pressure 1-6Mpa, blast 0.4-0.6Mpa, air quantity 4-6 cubic meter/min.

Further feature is: water inlet and water outlet water pipe are the stainless steel seamless pipes of external diameter 22mm, wall thickness 3mm.

Blast furnace atomization tapping technology of the present invention with respect to prior art, has following characteristics:

1, high pressure water and high pressure gas are under high pressure atomized, form high-pressure atomization water, by drilling rod, the drill bit of the blast furnace open hole machine stemming of directly jetting; Guarantee in the drilling process of blast furnace open hole machine, to give all the time drilling rod, cooling that drill bit is good, reduce the wearing and tearing of drilling rod, drill bit, reduce drilling rod, bit consumption.

2, high-pressure atomization water is directly jetted on stemming, and the stemming that cooling is about to creep into allows the pyritous stemming burst, and helps creeping into of drill bit; Guarantee to beat tapping outlet (normally within 3 minutes) on time, prevent the generation of stewing stove phenomenon.

3, can prevent effectively that the iron mouth from producing the danger burst, can prevent that molten iron from flowing backwards again; Guarantee that the safety of blast furnace opening is with in time.

4, the Dust Capacity during blast furnace open hole obviously descends, and helps protecting environment and protection operator's health.

Embodiment

Blast furnace atomization tapping technology of the present invention is characterized in that: intake pressure 0.05-1Mpa, aquifer yield 1-10L/min, discharge pressure 1-6Mpa, blast 0.4-0.6Mpa, air quantity 4-6 cubic meter/min.In order to guarantee to reach the needed water yield and pressure, water pipe and tracheae are carried out necessary selection and laying, water inlet and water outlet water pipe adopt the stainless steel seamless pipe of external diameter 22mm, wall thickness 3mm (22*3) specification, rising pipe pressure-bearing 6Mpa; Tracheae adopts the galvanized pipe of DN25, tracheae pressure-bearing 2Mpa.

Blast furnace atomization tapping technology of the present invention, must select water source (tap water), pressurized air (air compressor machine), high-pressure atomizer etc., " YWH " board that our company produces with the Yichang Yanshi Science ﹠ Technology Development Co Ltd purges the atomizing open device and tests, and obtains good effect.Guarantee within 3 minutes, to beat tapping outlet, drill bit open 2 stove iron or more than, greatly reduce the consumption of drill bit and drilling rod, saved the cost of use of drill bit and drilling rod, reduced smelting cost from this side.

In concrete use, at the blast furnace of differing capacities, different size, different model, above-mentioned processing parameter can be chosen different numerical points or numerical range, with the preferable or optimum range of processing parameter that obtains being complementary with the different model blast furnace.As, intake pressure can be chosen 0.05Mpa, 0.1Mpa, 0.15Mpa, 0.2Mpa, 0.25Mpa, 0.3Mpa, 0.35Mpa, 0.4Mpa, 0.45Mpa, 0.5Mpa, 0.55Mpa, 0.6Mpa, 0.65Mpa, 0.7Mpa, 0.75Mpa, 0.8Mpa, 0.85Mpa, 0.9Mpa, 0.95Mpa, concrete numerical value such as 1.0Mpa; Aquifer yield can be chosen 1.0L/min, 2.0L/min, 3.0L/min, 4.0L/min, 5.0L/min, 6.0L/min, 7.0L/min, 8.0L/min, 9.0L/min, concrete numerical value such as 10L/min; Discharge pressure can be chosen 1.0Mpa, 1.5Mpa, 2.0Mpa, 2.5Mpa, 3.0Mpa, 3.5Mpa, 4.0Mpa, 4.5Mpa, 5.0Mpa, 5.5Mpa, concrete numerical value such as 6.0Mpa; Blast can be chosen 0.4Mpa, 0.45Mpa, 0.5Mpa, 0.55Mpa, concrete numerical value such as 0.6Mpa; Air quantity can be chosen 4.0 cubic metres/min, and 4.5 cubic metres/min, 5.0 cubic metres/min, 5.5 cubic metres/min, concrete numerical value such as 6 cubic metres/min.While is according to the caliber size of the water pipe and the tracheae of adapted, corresponding mutually with the water pipe and the tracheae of adapted, obtain meeting the parameter area of processing requirement, guarantee normally carrying out of blast furnace open hole, guarantee within 3 minutes, to beat tapping outlet, drill bit can open 2 stove iron or more than, to reduce the consumption of drill bit and drilling rod.

Claims (2)

1, blast furnace atomization tapping technology is characterized in that: intake pressure 0.05-1Mpa, aquifer yield 1-10L/min, discharge pressure 1-6Mpa, blast 0.4-0.6Mpa, air quantity 4-6 cubic meter/min.

2, blast furnace atomization tapping technology according to claim 1 is characterized in that: water inlet and water outlet water pipe are the stainless steel seamless pipes of external diameter 22mm, wall thickness 3mm.