Firebox structure of pusher plate kiln in calcining apparatuses for preparing alloy of vanadium-nitrogen continously

A technology of furnace structure and vanadium-nitrogen alloy, which is applied in the field of vanadium-nitrogen alloy, can solve the problems of extremely serious oxidation erosion of graphite lining and small oxidation erosion of graphite material in the inner cavity, so as to improve service life, prevent corrosion and ensure normal operation Effect

Active Publication Date: 2006-04-19
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water vapor escapes in the temperature range of 400-700°C in the pusher kiln. Due to the low temperature in this area, the oxidation and erosion effect of water vapor on the graphite material in the inner cavity is very small; in the transition section of 850-1450°C, there is A lot of CO, CO 2 And a small amount of water vapor, the oxida

Method used

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  • Firebox structure of pusher plate kiln in calcining apparatuses for preparing alloy of vanadium-nitrogen continously
  • Firebox structure of pusher plate kiln in calcining apparatuses for preparing alloy of vanadium-nitrogen continously
  • Firebox structure of pusher plate kiln in calcining apparatuses for preparing alloy of vanadium-nitrogen continously

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0024] Example 1:

[0025] Before the implementation of the present invention, the inner lining of each temperature zone of the pusher kiln is made of corundum, the heating element cavity is not isolated from the furnace, the service life of the pusher kiln is only about 25 days, and the heating element replacement frequency is 8.2 pieces / Every day, the frequency of power failure of the pusher kiln is 3.7 times / day.

Example Embodiment

[0026] Example 2:

[0027]Before the implementation of the present invention, the lining material of the pusher kiln is graphite material, the heating element cavity in the 6-7 temperature zone is isolated from the furnace, the service life of the pusher kiln is 70 to 90 days, and the heating element replacement frequency is 5.4 per day. The frequency of power failure of the pusher kiln is 2.6 times / day.

Example Embodiment

[0028] Example 3:

[0029] In the implementation of the technical scheme of the present invention, the lining of the low temperature section, the rear of the transition section and the high temperature section of the pusher kiln are all made of graphite materials, and the side walls and tracks at the front of the transition section are made of high-purity fused magnesia bricks and top bricks. For graphite bricks up to 200mm thick, the heating element cavities in each temperature zone are isolated from the furnace, and the furnace height in the 8-temperature zone is 80mm lower than other temperature zones. After implementation, the service life of the pusher kiln has been increased to 220 to 240 days, the frequency of heating element replacement has been reduced to 0.8 per day, and the number of power failures has been 1 to 2 times per month.

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Abstract

An internal cavity structure of the push bar kiln used for preparing VN alloy is composed of internal cavity, cover plate, side wall and tracks. A push bar kiln is longitudinally and sequentially composed of the low-temp segment with 5 temp regions, the transition segment with 4 temp regions, the high-temp segment with 7 temp regions, and the cooling segment consisting of natural cooling region and forced cooling region. It features that different but proper refractories are chosen for different temp regions. Its internal cavity has 3 separated channels. The central channel is the kiln cavity and two side channels are isolated heating element ones.

Description

technical field [0001] The invention belongs to the technical field of vanadium-nitrogen alloys, in particular to a furnace structure of a pusher kiln for calcining equipment for continuously producing vanadium-nitrogen alloys in industry. Background technique [0002] In the existing method for preparing vanadium-nitrogen alloy, there is no mention of the internal cavity structure of the calcination equipment and the materials used in the internal cavity of the equipment. "Production method of vanadium-nitrogen alloy" patent application (application number: 01139886.8, publication number CN1422800A,) the calcining equipment adopted is a pusher kiln, and the key factors affecting the service life of the pusher kiln and heating elements are the kiln body cavity structure and the The main reason for the materials used in the inner chamber of the equipment is: water vapor, CO, CO in kiln chambers in different temperature zones 2 and low boiling point alkali metal elements (Na ...

Claims

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Application Information

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IPC IPC(8): C01B21/06F27B9/22
Inventor 周家琮谢屯良孙朝晖邓孝伯李瑰生
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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