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Grouting method of blast furnace taphole duct

A technology of tunnel grouting and tap hole, which is applied to blast furnaces, blast furnace details, blast furnace parts, etc. It can solve problems such as unclean slag and iron discharge, divergent iron flow, and tap hole splashing, so as to ensure smoothness and improve stability Sexuality, the effect of reducing the probability of accidents

Inactive Publication Date: 2014-04-30
ANGANG STEEL CO LTD
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Problems solved by technology

The iron hole is the channel through which the liquid molten iron produced in blast furnace smelting is discharged, while the hearth of the blast furnace is a high-pressure vessel in which high-temperature and high-pressure gas exists. During the ironing process, the iron flow diverges, resulting in iron mouth splashing, and in severe cases, the slag and iron are not clean, which affects the stability and smooth flow of blast furnace production

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  • Grouting method of blast furnace taphole duct

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Embodiment Construction

[0017] Depend on figure 1 Visible, blast furnace tap hole grouting method of the present invention mainly is under normal production situation, utilizes the original mud cannon 1, grouting machine 2, sealing gun head 4 and tap hole mud cover 5 equipment and the grouting material before the blast furnace stove, Fill and block the inner wall of the tap hole, and control the splashing of molten iron from the tap hole by preventing the cross-wind of the tap hole. Its specific method and steps are:

[0018] 1. Firstly, drill out a 3.0 m deep hole in the iron hole with a tapping machine.

[0019] 2. Close the rear end of the sealing nozzle 4, and open a grouting interface on the side of the sealing nozzle 4, and then use the mud gun 1 to seal the sealing nozzle 4 on the iron nozzle mud sleeve 5.

[0020] 3. Connect the grouting pipe 3 of the grouting machine 2 to the grouting interface of the sealing nozzle 4 .

[0021] 4. Use the grouting machine 2 to press the unshaped refracto...

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Abstract

The invention provides a grouting method of a blast furnace taphole duct. The method comprises the following steps: firstly, drilling a hole which is 2.8-3.2m deep in the taphole by using a tapping machine; blocking a seal gun head on a taphole clay sleeve by using a clay gun; connecting a grouting pipe of a mudjacking machine on a grouting interface at the side of the seal gun head, and then pressing an amorphous refractory material into a taphole duct by using the mudjacking machine, controlling the pressure of the mudjacking machine at 2-2.2MPa, controlling the flow rate of the amorphous refractory material at 1-5m<3> / h; continuing to keep the pressure of the mudjacking machine for 2-5 minutes after grouting until the amorphous refractory material is rapidly dried and condensed. By adopting the grouting method, air mixing of the taphole can be reduced, splashing of the taphole is prevented, the discharge smoothness of the slag is ensured, production of a blast furnace is facilitated, the probability of an accident is effectively reduced, and the flushing and casting stability of the blast furnace is improved.

Description

technical field [0001] The invention belongs to the technical field of ironmaking technology, and in particular relates to a grouting method for a blast furnace taphole channel used for preventing molten iron from splashing. Background technique [0002] During the production process of the ironmaking blast furnace, the state of the taphole directly affects the operation of the blast furnace. Therefore, maintaining and controlling the state of the taphole is an important link in the production of the blast furnace and an important guarantee for the smooth operation of the blast furnace. The iron hole is the channel through which the liquid molten iron produced in blast furnace smelting is discharged, while the hearth of the blast furnace is a high-pressure vessel in which high-temperature and high-pressure gas exists. During the ironing process, the iron flow diverges, resulting in iron mouth splashing, and in severe cases, the slag and iron are not clean, which affects the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/12
Inventor 唐继忠杨金山李仲张延辉姜彦冰周永利何冲江治飞
Owner ANGANG STEEL CO LTD
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