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Closed type calcium carbide furnace charging nozzle and process for producing same

A calcium carbide furnace, a closed technology, applied in the direction of manufacturing tools, metal processing equipment, furnaces, etc., can solve the problems of negative impact on production cost and output quality, influence on the quality of calcium carbide in furnace conditions, and easy burnout of feed nozzles, etc., to achieve improvement Material layer quality structure, process operation control, high yield, high quality, low energy consumption, and reduced heat loss

Inactive Publication Date: 2009-09-09
YUNNAN YUNWEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used closed calcium carbide furnace charging nozzles at home and abroad are made of stainless steel plates or other steel plates that are rolled and welded together. Higher, which often leads to tearing and water leakage of the inner arc surface weld seam under the action of welding stress and thermal stress, and serious convex deformation of the inner arc surface, which makes the nozzle of this kind of material very easy to be burned. The nozzle is made of magnetically isolated stainless steel, so its cost is relatively high. At the same time, it takes at least three hours to replace a nozzle when the furnace is shut down. This will affect the production operation, control, furnace material surface structure, and furnace condition. Cause a relatively large impact, and have a relatively large negative impact on production costs and output quality

Method used

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  • Closed type calcium carbide furnace charging nozzle and process for producing same
  • Closed type calcium carbide furnace charging nozzle and process for producing same
  • Closed type calcium carbide furnace charging nozzle and process for producing same

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Embodiment

[0015] As shown in the figure, the charging nozzle of the closed calcium carbide furnace of the present invention consists of two sets of seamless outer casings 8, seamless inner casings 9, water inlet pipes 3, water outlet pipes 4, connecting pipes 5, and flanges 7 inlaid on the bottom. The seamless inner casing 9 is placed in the seamless outer casing 8, the bottom edge is inlaid with the flange 7, the water inlet pipe 3 and the water outlet pipe 4 are installed on two sets of seamless outer casings respectively, and the connecting pipe 5 connects the two Set of seamless casings. Install the hanging plate 1 and the lifting lug 2 on the two sets of seamless outer casings, and the bottom opening has a reinforcing triangle plate 6.

[0016] Production Method:

[0017] After inserting the outer sleeve 8 and the inner sleeve 9 first, the outer sleeve 8 and the inner sleeve 9 are separated by the bottom edge inlaid flange 7, spot welded in sections, and then the same method is us...

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Abstract

The invention provides a closed type calcium carbide furnace charging nozzle and a process for producing the same. The charging nozzle mainly comprises two groups of seamless external casings, seamless internal casings, water inlet pipes, water outlet pipes, communication pipes and bottom edge embedded flanges; the seamless internal casings are arranged in the seamless external casings; the bottom edge embedded flanges, the water inlet pipes and the water outlet pipes are arranged on the two groups of the seamless external casings respectively; and the two groups of seamless external casings are communicated with the communication pipes. The charging nozzle has the advantages of solving the problems of water leakage due to frequent breakage and frequent shut-down of the furnace for exchange, meeting the requirements on the charging production of a closed type calcium carbide furnace, effectively improving quality structure of material layers around electrodes, greatly improving furnace conditions (avoiding piling of materials on the outer side of the charging nozzle), making the materials keep a steamed bread-shaped charge surface around the electrodes, further effectively reducing thermal loss, alleviating the insufficiency of the materials in the central region of the furnace, reducing the temperature of the charge surface, reducing exposing areas of the electrodes, reducing the thermal loss of electrode resistances, improving the quality structure of the material layers, contributing to improving the pre-heating of the furnace materials and forming a big crucible region, ensuring good furnace conditions, avoiding frequent occurrence of material stamping and material throwing, and further facilitating the technical operation and control of the furnace and high yield, high quality and low energy consumption of the furnace.

Description

technical field [0001] The invention relates to the technical field of smelting equipment, in particular to a new and optimally designed closed charging nozzle of a calcium carbide furnace and a manufacturing process. Background technique [0002] At present, the commonly used closed calcium carbide furnace charging nozzles at home and abroad are made of stainless steel plates or other steel plates that are rolled and welded together. Higher, which often leads to tearing and water leakage of the inner arc surface weld seam under the action of welding stress and thermal stress, and serious convex deformation of the inner arc surface, which makes the nozzle of this kind of material very easy to be burned. The nozzle is made of magnetically isolated stainless steel, so its cost is relatively high. At the same time, it takes at least three hours to replace a nozzle when the furnace is shut down. This will affect the production operation, control, furnace material surface structu...

Claims

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Application Information

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IPC IPC(8): F27D3/00B23K9/00
Inventor 胡华生陈猛章黄勇欢
Owner YUNNAN YUNWEI CO LTD
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