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Method for blowing high-grade matte through horizontal rotary furnace

A converter blowing, high-grade technology, applied in the field of blister copper smelting, can solve the problems of low air supply rate, long blowing cycle, high labor intensity, etc., achieve low production cost, reduce slag discharge time, and reduce labor the effect of strength

Active Publication Date: 2019-12-24
山西北方铜业有限公司
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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 solve the technical problems of long blowing period, low air supply rate, low single furnace output, low system capacity and high labor intensity in the existing matte blowing method, and to provide a Method for Converting High-grade Matte in Horizontal Converter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for blowing high-grade matte utilizing a horizontal converter in this embodiment comprises the following steps:

[0029] 1) The selection of blowing raw materials, select the matte with a grade of 70% as the blowing raw materials;

[0030] 2) When the converter is empty and waiting for materials, because the furnace body dissipates heat quickly, in order to maintain the heat balance in the blowing process, use natural gas to keep the furnace warm so that the furnace temperature is not lower than 700 ° C, and at the same time add 10-15 tons to the furnace Cold material; the cold material is purchased miscellaneous copper, high-copper-containing materials produced in the production of the anode furnace in the next process, and splashes during the production process of the converter;

[0031] 3) Feed 50 tons of material into the converter, open the compressed air valve and the oxygen valve, and keep the total gas flow into the furnace at 22000±200m 3 / h and the o...

Embodiment 2

[0036] A method for blowing high-grade matte utilizing a horizontal converter in this embodiment comprises the following steps:

[0037] 1) the selection of blowing raw materials, the selection grade is 72% matte as blowing raw materials;

[0038] 2) When the converter is empty and waiting for materials, because the furnace body dissipates heat quickly, in order to maintain the heat balance in the blowing process, use natural gas to keep the furnace warm so that the furnace temperature is not lower than 700 ° C, and at the same time add 10-15 tons to the furnace Cold material, the cold material is purchased miscellaneous copper, high-copper-containing materials produced in the anode furnace production in the next process, splashes in the converter production process, and matte cladding;

[0039] 3) Feed 50 tons of material into the converter, open the compressed air valve and the oxygen valve, and keep the total gas flow into the furnace at 22500±200m 3 / h and the oxygen cont...

Embodiment 3

[0044] A method for blowing high-grade matte utilizing a horizontal converter in this embodiment comprises the following steps:

[0045] 1) the selection of blowing raw materials, the selection grade is 73% matte as blowing raw materials;

[0046] 2) When the converter is empty and waiting for materials, use natural gas to keep the furnace warm so that the furnace temperature is not lower than 700°C. At the same time, add 10-15 tons of cold material to the furnace. The cold material is purchased miscellaneous copper, lower High-copper-containing materials produced in the production of anode furnaces in the first process, and splashes in the production process of converters;

[0047] 3) Feed 50 tons of material into the converter, open the compressed air valve and the oxygen valve, and keep the total gas flow into the furnace at 23000±200m 3 / h and the oxygen content in the furnace is 23%-24%, then the furnace body is transferred to the blowing position for blowing. During the...

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Abstract

The invention relates to a method for blowing high-grade matte through a horizontal rotary furnace. The technical problem is solved that an existing matte blowing method is long in blowing cycle, lowin air supply time rate and low in single furnace output. According to the technical scheme, the method includes the following steps of firstly, selecting the matte at the grade of 70-75% as the blowing raw material; secondly, conducting thermal insulation on a hearth through natural gas when the empty rotary furnace waits for the material; thirdly, adding 50 tonnages of the raw material into therotary furnace for blowing; fourthly, conducting blowing for 30-50 minutes, and then adding 25 tonnages of the raw material into the rotary furnace to continue the blowing; fifthly, conducting blowingfor 25-35 minutes, and then adding 25 tonnages of the raw material into the rotary furnace for blowing for 5 minutes, and then adding quartz stone into the furnace to continue the blowing; sixthly, continuing the blowing for 65-75 minutes, then conducting depositing for 5 minutes, and then discharging residues. When the high-grade matte is blown in the horizontal rotary furnace, a traditional two-cycle blowing method is changed into a single-cycle blowing method, the blowing time is shortened, and the method has the advantages of high safety coefficient, large cold material throughput, low inproduction cost and the like.

Description

technical field [0001] The invention belongs to the technical field of blister copper smelting, and in particular relates to a method for blowing high-grade matte by using a horizontal converter. Background technique [0002] As the main equipment for copper matte blowing, the horizontal converter is widely used in actual production by various enterprises because of its simple operation and low energy consumption. The main components of traditional copper matte are FeS and Cu 2 S, in which iron content is between 15-20% and copper content is between 60-65%, its blowing is divided into two cycles: [0003] One cycle 2FeS+3O 2 =2FeO+2SO 2 (1) [0004] 2FeO+SiO 2 = 2FeO SiO 2 (2) [0005] Two-period 2Cu 2 S+3O 2 =2Cu 2 O+2SO 2 (3) [0006] Cu 2 S+2Cu 2 O=6Cu+SO 2 (4) [0007] In one cycle, FeS in the matte reacts with oxygen and quartz to convert sulfur into SO 2 Removed in the form of 2FeO SiO 2 The form is removed, and a large amount of heat is released ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/06
CPCC22B15/0041
Inventor 陆湖南贾建华柴胜利高红霞吕红生车瑞杰王勤学
Owner 山西北方铜业有限公司
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