High angle drill at blast furnace casting port

Abstract

The invention relates to a high-angle drill set on a blast furnace iron mouth. The technical proposal is introduced below: the high-angle drill comprises a base and a blade knife; the center of the base is provided with a main ventage and the base top is uniformly made into three to five wings with top surfaces inclining towards the base center with an angle of Alpha. The middle of each wing is provided with a knife trough; the blade knife is welded in the knife trough; the knife body shape is in accordance with the knife trough while the knife edge is higher than the trough. The two hypotenuses on the knife edge form an angle of Beta. The sidewall of the base between each wing is provided with a side ventage which is connected with the main ventage and inclines to the main ventage with an angle of Gamma. By the invention, the invention only needs at most two drill bits and drill pipes to open a three meters high furnace and within two to three minutes the iron mouth can be opened too. The technology can not only lower the application cost, but also decrease the labor intensity of workers significantly. Additionally, due to the short time of iron mouth opening, the quantity of iron slag remaining in the furnace is decreased.

Description

Technical field: [0001] The invention relates to the field of a drill bit, in particular to a drill bit used for a drill pipe of a blast furnace taphole opening machine. Background technique: [0002] The iron slag tapping operation in front of the blast furnace is a very important link in the blast furnace production, and the timely opening of the blast furnace to exhaust the iron slag is the key. At present, drill bits are used for blast furnace taphole opening, such as figure 1 As shown, most of the blades 20 are directly welded on the upper end of the base 10, and the blades 20 are horizontal, that is, the edges of all blades are on the same horizontal plane, so that when opening, the upper top surface of the blades Stress, plane contact, large resistance, easy to grind the outer corner without turning into a pointed shape, not moving, and the opening time is long. It takes about 20 minutes to open once. When the depth of the iron hole reaches 3 meters, sometimes it eve...

AI Technical Summary

Problems solved by technology

At present, drill bits are used for blast furnace taphole opening, such as figure 1 As shown, most of the blades 20 are directly welded on the upper end of the base 10, and the blades 20 are horizontal, that is, the edges of all blades are on the same horizontal plane, so that when opening, the upper top surface of the blades Stress, plane contact, large resistance, easy to grind the outer corner without turning into a pointed shape, not moving, and the opening time is long. It takes about 20 minutes to open once. When the depth of the iron hole reaches 3 meters, sometimes it even reaches 40 minutes; Since the blade is directly welded on the base, when it reaches the red point, the high temperature melts and the blade melts, and the blade is also easy to fall off due to vibration when opening, and multiple drill bits and drill pipes need to be replaced, such as a For a blast furnace with a taphole depth of 3 meters, 3 to 5 drill pipes and drill bits are required to drill the taphole for one opening; this results in high labor intensity for workers, slag and iron in the furnace, and large consumption of drill bits and drill pipes, resulting in waste

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