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Drill bit for taphole of blast furnace and method for producing same

A manufacturing method, blast furnace iron tapping technology, applied in the blast furnace, blast furnace details, blast furnace parts, etc., can solve the unreasonable structural shape or size of the drill bit, can not guarantee that the drill bit can open the iron hole at one time, and can not guarantee that the drill bit will not be melted by molten iron And other problems, to achieve the effect of not easy to break, improve the flexural strength and toughness, and speed up the cutting speed

Active Publication Date: 2009-03-11
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The "one-time opening method" is generally used in the existing blast furnaces at home and abroad, but most of them have the following deficiencies or shortcomings: (1) The shape or size of the drill bit structure is unreasonable, such as figure 1 , figure 2 As shown, the edges and corners of the blade 30 on the base 10 with the air hole 20 are not sharp, and the cutting surface is small, resulting in poor cutting ability of the drill bit, and the opening time of the iron hole is long, and it takes about 7 to 10 minutes for one piece
This just results in: can't guarantee that drill bit is not damaged by molten iron; consume

Method used

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  • Drill bit for taphole of blast furnace and method for producing same
  • Drill bit for taphole of blast furnace and method for producing same
  • Drill bit for taphole of blast furnace and method for producing same

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Embodiment Construction

[0031] see image 3 , Figure 4 , the blast furnace taphole opening machine drill bit of the present invention comprises a base 3, 3 blades 5; the center of the base 3 is provided with a φ12.5mm air hole 2; 3 blades 5 are formed on the drill base 3 120 ° (as with 4 blades, then 90 ° arrangement) evenly arranged; the head of the blade 5 is a trapezoidal structure inclined to the central air hole 2 (the central axis of the drill bit is inclined), and the height h of the outer edge of the drill bit is 13-16 mm; the base 3 between the blades 5 is provided with a side air passage 4, which communicates with the central vent hole 2 and forms an angle α of 60° with the central vent hole 2, Caliber φ8~10mm; blade 5 head forms an angle β, angle β is 45°; described blade 5 trapezoid top width t is 8mm, and bottom width T is 25mm.

[0032] There is a straight pipe connection section 1 of a certain length at the bottom of the drill base 3, and the connection section 1 does not process ex...

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Abstract

Disclosed is a drill bit for taphole of blast furnace, which comprises a base and three blades, the base is provided with a venting hole in the center, and side air passages in communication with the central venting hole, the blades are in uniform distribution on the base, the head of the blades are of trapezoidal structure inclining toward the central venting hole, the exterior height of the drilling bit is 13-16 mm. The invention also discloses the process for making the dill bit.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and in particular relates to a drill bit for a blast furnace taphole opening machine drill rod and a manufacturing method thereof. Background technique [0002] The slag and iron operation in front of the blast furnace is a very important link in the blast furnace production. The timely opening of the slag and iron can not only maintain the stability of the blast furnace production, but also maximize the ability of the blast furnace to resist the influence of external adverse factors. The blast furnace production process requires that the liquid level of slag and iron in the hearth is relatively low and relatively stable, otherwise there will be abnormal furnace conditions such as irregular feeding, wind pressure fluctuations, furnace temperature fluctuations, and even material collapse and slippage, which will endanger the normal production of the blast furnace. Therefore, the front operation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/12
Inventor 徐万仁敖爱国张永忠钱光华朱勇兴
Owner BAOSHAN IRON & STEEL CO LTD
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