Blast furnace atomization tapping technology

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

Technical field [0001] The invention relates to a production process technology of a blast furnace used in the production of iron and steel in a steel plant, in particular to a blast furnace atomization tapping process technology. Background technique [0002] In the field of steel production in steel plants, blast furnaces are important iron-making equipment. An opening machine must be used in front of the blast furnace to open the iron hole, so that the molten iron can flow smoothly from the bottom of the blast furnace. With the development of blast furnace ironmaking technology, blast furnace tapholes tend to be deeper, harder, and more heat; especially for blast furnaces with double tapholes, since the two tapholes are turned on to discharge the molten iron in turn, each taphole is The time interval for opening the molten iron is prolonged (basically, the time is doubled), which causes the gun mud to harden and it is difficult to open the iron hole. The above situation has ca...

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Problems solved by technology

However, the application documents do not provide parameters such as the pressure and flow rate of cooling water and gas. In actual use, if there is too much cooling water after atomization, once the cooling water comes into contact with high-temperature molten iron in large quantities, it will easily burst. It is very dangerous; and if the cooling water after atomization is too little, once the iron hole is drilled, it cannot prevent the molten iron from flowing back, and there are also potential safety hazards

At the same time, if the pressure is too high or too low, it will directly affect the effect of the atomization and purging device. The function of sweeping, so that the high-heat dust generated when the drill bit is working cannot be wetted in time, and the backflow of molten iron cannot be prevented