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Total-heat-state copper matte blowing heat balance control method

A control method and heat balance technology, applied in the field of continuous copper smelting, can solve problems such as inability to achieve heat balance control and inability to stabilize production

Active Publication Date: 2022-02-01
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defect that the full-heat state copper matte blowing method in the prior art cannot realize heat balance control and stable production, and provide a full-heat state copper matte blowing heat balance control method, which can effectively control The heat balance in the blowing process realizes the effect of stable production in full-heat state copper matte blowing

Method used

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  • Total-heat-state copper matte blowing heat balance control method
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Examples

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Effect test

Embodiment 1

[0077] In this embodiment, the heat balance of the full-heat state continuous blowing is controlled by controlling the flow rate of nitrogen doping.

[0078] In bottom-blowing furnace continuous feed blowing and periodic copper discharge, the heat balance control process in the cycle is as follows:

[0079] The grade of raw material hot matte is 74.5%, and the feed flow rate is 0.4t / min. The size of the bottom blowing furnace body is Φ5.2m*23m.

[0080] The structure and layout of the blowing oxygen lance are as follows: the blowing oxygen lance has inner pipes 1 distributed along the circumferential direction at intervals (that is, the central pipe 101 and intermediate pipes 102 distributed along the outer circumferential direction of the central pipe 101 ), and along the outer circumferential direction Outer pipes 2 distributed at intervals, such as image 3 As shown, the area ratio of the total ventilation section of the inner pipeline 1 to the total ventilation section of ...

Embodiment 2

[0085] In this embodiment, the heat balance of the full-heat state continuous blowing is controlled by controlling the flow rate of nitrogen doping and adding cold material in a synergistic manner.

[0086] Specifically, proceed according to the method of Example 1. The difference is that during the periodical blowing process, the temperature of the slag layer also rises to above 1235°C, and the temperature of the blister copper layer rises to above 1245°C. At this time, In the bottom blowing furnace, 30t of cold material is also added, which is the anode butt. The total blowing time was 5 hours and 35 minutes.

[0087] After periodic copper discharge, the grade of blister copper is 98.12%.

Embodiment 3

[0089] In this embodiment, the heat balance of the full-heat state continuous blowing is controlled by controlling the flow rate of nitrogen doping, adding cold material and controlling the grade of hot matte.

[0090] Carry out according to the method of embodiment 2, the difference is that in the periodic blowing process, the temperature of the slag layer also rises to above 1235°C, and the temperature of the blister copper layer rises to above 1245°C, at this time, the control The grade of raw material hot matte is 75%-76%. The total blowing time was 5 hours.

[0091] After periodic copper discharge, the crude copper grade is 98.0%.

[0092] Known by above-mentioned embodiment, adopt the heat balance control method of the present invention, can realize full-heat state continuous blowing method, and the blister copper obtained, and the technology of the mixed production of existing cold and hot state matte (the crude copper that it makes Copper grade is generally lower tha...

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Abstract

The invention belongs to the technical field of total-heat-state copper smelting, and particularly relates to a total-heat-state copper matte blowing heat balance control method which comprises the following steps: in the blowing process, carrying out oxygen supply blowing operation on raw material hot matte in a bottom blowing furnace through an oxygen blowing mechanism to obtain crude copper and furnace slag, the oxygen blowing mechanism comprising an inner pipeline and an outer pipeline, the inner pipeline and the outer pipeline being used for ventilation, the outer pipeline being arranged in the outer circumferential direction of the inner pipeline, compressed air and oxygen being introduced into the inner pipeline, and nitrogen A being introduced into the outer pipeline, and introducing nitrogen gas B into the inner pipeline; the grade of the raw material hot matte is controlled to be 72%-76%. By controlling the grade of hot matte and introducing nitrogen B into the inner pipeline in a matched manner, heat generation and heat dissipation can be in a balanced state, and the interior of the furnace is controlled not to be overheated, so that stable production is realized, and meanwhile, the grade of obtained crude copper is ensured.

Description

technical field [0001] The invention belongs to the technical field of continuous copper smelting, and in particular relates to a heat balance control method for blowing copper matte in a full-heat state. Background technique [0002] At present, in the field of copper smelting, there are still many problems in the use of bottom-blown furnaces. For example, the oxygen concentration control of the air supply to bottom-blown furnaces is relatively high, and there is overheating in the furnace. Among them, in the matte blowing process, the slagging reaction and copper-making reaction are respectively: [0003] 2FeS+3O 2 +SiO2 2 =2FeO SiO 2 +2SO 2 [0004] Cu 2 S+O 2 =2Cu+SO 2 . [0005] In the above reaction, about 5853kJ of heat can be released per kilogram of FeS, and per kilogram of Cu 2 S produces metal copper that can release about 456kJ of heat, that is, the blowing of matte is a self-heating process, and the heat released by the chemical reaction can not only m...

Claims

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Application Information

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IPC IPC(8): C22B15/06
CPCC22B15/0095C22B15/0041
Inventor 陈景河袁朝新余群波林鸿富周安梁陈承湖李田玉江城郭持皓韦其晋孙聪董王子孙彦伟高磊董成海
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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