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Overhaul method for semi-hot state of flash smelting furnace

A flash furnace and furnace body technology, which is applied to furnaces, fluidized bed furnaces, lining repairs, etc., can solve problems affecting production safety, easy damage to triangular areas, and affecting production, so as to shorten maintenance time, avoid costs, Guarantee the effect of production

Active Publication Date: 2011-08-10
JINLONG COPPER
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Since the triangular area of ​​the sedimentation tank of the flash furnace is easily damaged, and the sedimentation tank at the lower part of the ascending flue is less likely to be damaged, the entire furnace body is lowered to normal temperature for maintenance, which will seriously affect production
If timely maintenance is not carried out through the triangular area in time, it will affect the safety of production

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0019] Embodiment: Take the flash furnace of Jinlong Copper Industry Co., Ltd. as an example for maintenance, and maintain according to the following steps:

[0020] (1) The water-cooled baffle is made of heat-resistant materials, and a cold water chamber is arranged inside the baffle;

[0021] (2) Cool down the furnace body and lower the overall furnace body to 800°C for heat preservation;

[0022] (3) Divide the flash furnace from the sedimentation tank, and isolate the area under the reaction tower and the triangular area with a very large degree of erosion with water-cooled baffles to form a cold repair area, and the rest are hot areas;

[0023] (4) Gradually lower the temperature of the severely eroded cold repair area until it drops to normal temperature; gradually reduce the temperature to 700°C in the hot state area;

[0024] (5) Protect the bottom of the furnace in the cold repair area with insulation cotton;

[0025] (6) Overhaul the eroded area in the cold repair ...

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Abstract

The invention discloses an overhaul method for semi-hot state of a flash smelting furnace, which comprises the following steps of: (1) manufacturing a water-cooled baffle; (2) cooling a furnace body and carrying out heat insulation to the furnace body; (3) dividing the flash smelting furnace and isolating by the water-cooled baffle; (4) cooling a cold repair area to room temperature, and cooling a hot-state area to 700 DEG C; (5) overhauling an erosion area in the cold repair area; and (6) sealing the flash smelting furnace after overhauling, naturally warming, lifting the isolating water-cooled baffle for warming, warming the whole furnace body to 800-850 DEG C and keeping constant temperature for 1-2 days after the cold repair area is warmed to 600-700 DEG C, then warming to the feed temperature and finally finishing overhauling. The overhaul method has the advantages that the maintenance cycle is shortened, the maintenance material is saved, the production is ensured, and the economic benefit is improved.

Description

technical field [0001] The invention relates to a flash furnace maintenance method in the flash furnace smelting process. Background technique [0002] The flash furnace smelting process is a smelting process in which the dried concentrate is fully mixed with the process air through the concentrate nozzle and sprayed into the flash furnace, and thermal dissociation and oxidation reactions are carried out in the reaction tower. The obtained matte and slag are separated in a sedimentation tank. Flash furnace is a kind of equipment for high-intensity smelting process. It is composed of reaction tower, sedimentation tank and ascending flue respectively. [0003] The reaction tower is the main part of the chemical reaction in copper smelting, consisting of the tower top, tower wall and connection. Except for the top of the reaction tower, the body of the tower is surrounded by 20mm thick steel plates to form a shell, and the shell is built with magnesia-chrome refractory brick...

Claims

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Application Information

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IPC IPC(8): F27D1/16F27B15/00
Inventor 宋修明赵荣升于熙广刘安明谢维忠王华骏
Owner JINLONG COPPER
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