Copper matte desulfurization and deoxidation gas switching control method

A gas switching and control method technology, which is applied in the field of deoxidizing gas switching control and copper matte desulfurization, can solve the problems of long operation time, long smelting cycle, and large manpower loss, and achieve the effects of high grade, reduced procedures, and reduced costs

Pending Publication Date: 2019-08-30
DONGYING FANGYUAN NONFERROUS METALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the blowing process, the matte is first oxidized to white matte, and then the copper-making reaction is carried out to produce blister copper. Finally, the anode copper is further oxidized and reduced in the refining process. There is a heat loss due to the intermediate material being transported, and a large manpower loss , long operation time and smelting cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use the flue gas online monitoring system to monitor the flue gas composition in the system to judge the composition of the melt in the pyrofinishing furnace; it is also possible to directly sample the melt for analysis, and then adjust the reaction process in the pyrofinishing furnace, specifically:

[0021] (1) When the sulfur content in the melt in the pyrofinishing furnace is greater than 0.3%, the bottom blowing lance sprays oxygen-enriched gas into the pyrofinishing furnace, and O in the oxygen-enriched gas 2 The volume content is 40%;

[0022] (2) When the sulfur content in the melt in the pyrofinishing furnace is less than 0.3%, the bottom blowing lance starts to gradually inject natural gas into the pyrofining furnace, and the oxygen-containing gas injected by the bottom blowing lance 2 The volume ratio with natural gas is 3;

[0023] (3) When the oxygen content in the melt in the refining furnace is ≥0.6%, the bottom-blowing lance starts to increase the amoun...

Embodiment 2

[0026] The gas switching process in the pyrofinishing furnace is:

[0027] (1) When the sulfur content in the melt in the pyrofinishing furnace is greater than 0.3%, the bottom blowing lance sprays oxygen-enriched gas into the pyrofinishing furnace, and O in the oxygen-enriched gas 2 The volume content is 60%;

[0028] (2) When the sulfur content in the melt in the pyrofinishing furnace is less than 0.3%, the bottom blowing lance starts to gradually inject natural gas into the pyrofining furnace, and the oxygen-containing gas injected by the bottom blowing lance 2 The volume ratio to natural gas is 3.2;

[0029] (3) When the oxygen content in the melt in the refining furnace is ≥0.6%, the bottom-blowing lance starts to increase the amount of reducing gas injected into the refining furnace, and the oxygen-containing gas injected by the bottom-blowing lance 2 The volume ratio to the reducing gas is 1.3;

[0030] Processing results: After the above process is completed, the ob...

Embodiment 3

[0032] The gas switching process in the pyrofinishing furnace is:

[0033] (1) When the sulfur content in the melt in the pyrofinishing furnace is greater than 0.3%, the bottom blowing lance sprays oxygen-enriched gas into the pyrofinishing furnace, and O in the oxygen-enriched gas 2 The volume content is 20.5%;

[0034] (2) When the sulfur content in the melt in the pyrofinishing furnace is less than 0.3%, the bottom blowing lance starts to gradually inject natural gas into the pyrofining furnace, and the oxygen-containing gas injected by the bottom blowing lance 2 The volume ratio to natural gas is 2.8;

[0035] (3) When the oxygen content in the melt in the refining furnace is ≥0.6%, the bottom-blowing lance starts to increase the amount of reducing gas injected into the refining furnace, and the oxygen-containing gas injected by the bottom-blowing lance 2 The volume ratio to the reducing gas is 1.1.

[0036] Processing results: the grade of matte produced by smelting is...

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PUM

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Abstract

A copper matte desulfurization and deoxidation gas switching control method comprises the following control steps that (1) when it is detected that the sulfur content in a melt in a fire refining furnace is more than 0.3%, oxygen-enriched gas is sprayed into the fire refining furnace through a bottom blowing spray gun, wherein the volume content of O2 in the oxygen-enriched gas is 20.5-60%; (2) when it is detected that the sulfur content in the melt in the fire refining furnace is less than 0.3%, reducing gas is gradually sprayed into the fire refining furnace through the bottom blowing spraygun, wherein when the reducing gas is natural gas, the volume ratio of the O2 in the oxygen-containing gas sprayed by the bottom blowing spray gun to the reducing gas is 2.8-3.2; and (3) when it is detected that the oxygen content in the melt in the fire refining furnace is greater than or equal to 0.6%, the bottom blowing spray gun starts to spray more reducing gas into the fire refining furnace,and when the reducing gas is the natural gas, the volume ratio of the O2 in the oxygen-containing gas sprayed by the bottom blowing spray gun to the reducing gas is 1.1-1.3. With the method, anode copper is directly produced, the process is simplified, the cost is reduced, and the grade of the produced anode copper is high.

Description

technical field [0001] The invention relates to a copper smelting method, in particular to a copper matte desulfurization and deoxygenation gas switching control method. Background technique [0002] In the blowing process, the matte is first oxidized to white matte, and then the copper-making reaction is carried out to produce blister copper. Finally, the anode copper is further oxidized and reduced in the refining process. There is a heat loss due to the intermediate material being transported, and a large manpower loss , long operating time and smelting cycle. [0003] The four-step operations of slagging, copper making, oxidation and reduction that need to be completed in the existing blowing process and refining process are realized through the switching of different gas components in the same device, and the automatic gas supply system for the pyrofinishing furnace has been developed. Through precise Regulate the switching of the four gases of oxygen, air, reducing ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/14C22B9/05
CPCC22B9/05C22B15/006
Inventor 崔志祥王智王海滨边瑞民崔文昭侯鹏杜武钊郑军涛孙云强张玉杰付磊陈永鑫
Owner DONGYING FANGYUAN NONFERROUS METALS
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