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A method for controlling parameters of depleted electric furnace top side blowing

A depleted electric furnace and parameter control technology, applied in electric furnaces, furnaces, rotary drum furnaces, etc., can solve the problems of spray gun clogging, increased gun abandonment rate, uneven distribution, etc., and achieve the effect of prolonging the service life and stabilizing the injection production

Active Publication Date: 2017-01-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the converter performs the slag return operation on the depleted electric furnace, it will cause Fe in the depleted electric furnace 3 o 4 Uneven distribution, the slag layer Fe in the area near the converter slag return chute 3 o 4 The content can be as high as 25%~30%
This will cause the viscosity of the slag layer to increase sharply. The submerged top-blowing reduction operation in this high-viscosity slag will easily cause the clogging of the spray gun in a short time and increase the rate of gun abandonment, which is not conducive to the smooth progress of production and cost control.

Method used

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  • A method for controlling parameters of depleted electric furnace top side blowing

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] Such as figure 1 As shown, an enterprise uses a rectangular depleted electric furnace for copper smelting depletion process, and divides the depleted electric furnace into three areas: the front of the furnace, the middle of the furnace and the rear of the furnace. At 10:00, the electric furnace stopped discharging slag, and it is expected to discharge slag at 12:00. At 8 o'clock, the converter had returned slag to the depleted electric furnace, and the slag returning chute was located in the front area of ​​the furnace. After testing, the average Fe of the slag layer in the front area of ​​the furnace was 3 o 4 The content is 22%, and the average Fe in the slag layer in the furnace zone 3 o 4 The content is 17%, and the average Fe in the slag layer in the furnace area 3 o 4 The content is 12%. The side blowing method is used to blow biodiesel into the slag layer in the furnace front area and the furnace area and mixed with nitrogen to form an oil-gas mixture, and...

Embodiment 2

[0020] Such as figure 1 As shown, an enterprise uses a rectangular depleted electric furnace for copper smelting mosaic process, and divides the depleted electric furnace into three areas: the front of the furnace, the middle of the furnace and the rear of the furnace. At 8 o'clock, the electric furnace stopped slagging, and it is expected to slagging at 10 o'clock. At 3 o'clock, the converter had returned slag to the depleted electric furnace, and the slag returning chute was located in the front area of ​​the furnace. After testing, the average Fe of the slag layer in the front area of ​​the furnace was 3 o 4 The content is 19%, and the average Fe in the slag layer in the furnace zone 3 o 4 The content is 17%, and the average Fe in the slag layer in the furnace area 3 o 4 The content is 15%. According to the feeding plan of the depleted electric furnace in the next 2 hours and the current amount of slag, 2 side blowing lances are used in the front area of ​​the furnace...

Embodiment 3

[0022] Such as figure 1 As shown, an enterprise uses a rectangular depleted electric furnace for copper smelting depletion process, and divides the depleted electric furnace into three areas: the front of the furnace, the middle of the furnace and the rear of the furnace. At 4:00 p.m., the electric furnace stopped discharging slag, and it is expected to discharge slag at 6:30 p.m. The converter did not return slag to the depleted electric furnace within 5 hours. After testing the average Fe 3 o 4 The contents are 14%, 11% and 9% respectively. The top blowing method is used to blow biodiesel into the slag layer in the furnace front area, furnace middle area and furnace rear area. According to the feeding plan of the depleted electric furnace in the next 2 hours and the current amount of slag, only 2 top-blowing spray guns are used in each area, and the symmetrical arrangement is adopted. The flow rate of top blowing biodiesel is 60L / h, and the viscosity of biodiesel is ≤10m...

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Abstract

The invention relates to a parameter control method for side blowing on the top of a depleted electric furnace, and belongs to the technical field of pyrometallurgy. First of all, the depleted electric furnace is divided into three areas, three of which are the furnace front area, the furnace middle area and the furnace rear area. The production method adopts centralized reduction and centralized discharge. Determine the injection time and number of spray guns during the reduction process by the estimated amount of feed and the immediate capacity of the electric furnace, and ensure that the settling time is more than half an hour, and then according to whether there is slag returning within 5 hours in the three areas, the average magnetic iron in the area The content and the actual production situation of the temperature in this area determine the injection method. The invention controls the top and side blowing according to the actual situation in the smelting process of the top-fire method of the depleted electric furnace, and solves the problem of serious nodulation of the spray gun under the working condition of the high viscosity of the slag layer of the depleted electric furnace under the simple submerged top-blown method.

Description

technical field [0001] The invention relates to a parameter control method for side blowing on the top of a depleted electric furnace, and belongs to the technical field of pyrometallurgy. Background technique [0002] In non-ferrous smelting, more and more oxygen-enriched enhanced smelting technology is used, so that the slag is enriched with Fe 3 o 4 , which will increase the viscosity of the slag, which is not conducive to the separation of copper matte and slag in the subsequent process, resulting in an increase in the copper content of the slag, resulting in a waste of precious metal resources and more likely to cause slagging. In order to reduce the copper content in slag and increase the recovery of copper matte, the slag must be depleted after oxygen-enriched enhanced smelting to reduce the copper content in the slag. [0003] At present, in the process of depleting the slag in the electric furnace, solid reducing materials such as coke, coal and charcoal are gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B15/00C22B5/02C22B5/12
Inventor 王华杨濮亦王仕博魏永刚刘泛函熊靓
Owner KUNMING UNIV OF SCI & TECH