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Combustion control method for copper refining and control system

A control method and control system technology, applied in the field of copper refining, can solve problems such as prone to explosion, and achieve the effects of increasing content, convenient control, and high degree of automation

Active Publication Date: 2016-04-20
四川博鑫铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen from Table 2 that although pure oxygen combustion has the advantages of saving energy and reducing exhaust gas emissions, it lacks the protection of inert gas (such as nitrogen) compared to air-assisted combustion, and carbon monoxide and hydrogen are in explosive concentrations most of the time during the reduction period. Within range, it is highly prone to explosion

Method used

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  • Combustion control method for copper refining and control system
  • Combustion control method for copper refining and control system
  • Combustion control method for copper refining and control system

Examples

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Effect test

Embodiment 1

[0032] Combustion control method used in copper refining. During the whole refining process, pure oxygen is fed to burn natural gas. During the reduction process, natural gas is burned according to the concentration of hydrogen, carbon dioxide and carbon monoxide in the underground flue and air is also fed in ( At this time, simultaneously feed air and pure oxygen to burn the natural gas), specifically: when the concentration sum of the three gases of hydrogen, carbon dioxide, and carbon monoxide is equal to or higher than the lower explosion limit, open the air pipeline to feed air to burn the natural gas, When the concentrations of hydrogen, carbon dioxide, and carbon monoxide are lower than the lower explosion limit, close the air pipeline and only feed pure oxygen to burn natural gas. Both air and pure oxygen are combustion-supporting gases.

[0033] The lower limit of explosion described in the present invention refers to the minimum concentration at which the mixed gas c...

Embodiment 2

[0079] On the basis of Embodiment 1, the remote control device is further improved in this embodiment:

[0080] Such as Figure 4 As shown, the first deflagration gas concentration calculation module includes an adder A1 and an adder A2, and the output terminals of two of the sensors in the hydrogen sensor, the carbon monoxide sensor, and the carbon dioxide sensor are respectively connected to an input end of the adder A1 , the output end of another sensor is connected to one input end of the adder A2; the other input end of the adder A2 is connected to the output end of the adder A1, and the output end of the adder A2 is the first explosion gas concentration calculation module output terminal. In this embodiment, the hydrogen sensor and the carbon monoxide sensor are connected to the two input terminals of the adder A1, so that the adder A1 performs a summation calculation on the hydrogen concentration Vh2 and the carbon monoxide concentration Vco, and the adder A2 compares ...

Embodiment 3

[0090] Generally, a dust removal device is provided at the outlet of the underground flue, and the dust removal device is provided with a working power provided by a motor, and the frequency of the motor of the dust removal device is controlled by a frequency converter: in this embodiment, on the basis of Embodiment 1 or Embodiment 2 , the remote control device is also improved as follows:

[0091] Such as figure 2 As shown, the remote control device also includes a motor frequency control module for controlling the frequency converter, the input terminal of the motor frequency control module is connected to the output terminal of the first concentration detection module, and the output terminal of the motor frequency control module is connected to the frequency converter.

[0092] In this embodiment, the motor frequency control module is a switching circuit, such as Figure 4 As shown, the motor frequency control module adopts a triode switching circuit, including a triode ...

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Abstract

The invention discloses a combustion control method for copper refining and a control system. The method comprises the steps of guiding pure oxygen for combusting natural gas in the whole refining process; in the reduction process, when the sum of the concentration of hydrogen gas, the concentration of carbon dioxide and the concentration of carbon monoxide is equal to or higher than the lower explosion limit, opening an air pipeline for guiding air for combusting the natural gas, and when the sum of the concentration of the hydrogen gas, the concentration of the carbon dioxide and the concentration of the carbon monoxide is lower than the lower explosion limit, closing the air pipeline and guiding the pure oxygen for combusting the natural gas. The control system comprises a combustion gun, a hydrogen gas sensor, a carbon monoxide sensor, a carbon dioxide sensor and a remote control device controlling the combustion mode. According to the invention, in the reduction process of copper refining, the air is guided for combusting the natural gas timely, protection to inert gas is improved, the temperature of waste gas can be lowered, the waste gas entering an underground flue is prevented from exploding, control is convenient, and the automation degree is high.

Description

technical field [0001] The invention relates to the technical field of copper refining, in particular to a combustion control method and control system for copper refining. Background technique [0002] During the refining process of red miscellaneous copper, the exhaust gas generated by the refining furnace enters the ground through the underground flue and then flows out of the workshop. However, the exhaust gas generated during the refining process of red miscellaneous copper contains unburned flammable gas and oxygen, which is easy to explode after reaching the explosive condition . Combustible gases are mainly hydrogen and carbon monoxide. Table 1 shows the explosion limits of these two gases: [0003] Table 1 Hydrogen and carbon monoxide explosion limit table [0004] [0005] The copper refining process mainly includes four stages: feeding, oxidation, reduction and pouring; in the prior art, the pure oxygen-natural gas combustion method is usually used to refine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/14
CPCC22B15/0028C22B15/0095
Inventor 俞建秋陈伟赵小平黄勇泉岳定淼文利伟
Owner 四川博鑫铜业有限公司
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