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Method for desorption of arsenic and antimony in blowing process of copper matte converter

A converter blowing and copper matte technology is applied in the field of copper smelting and can solve the problems of low extraction rate of arsenic and antimony, etc.

Active Publication Date: 2018-10-26
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the problems and deficiencies of the low arsenic and antimony removal rate in the traditional copper matte converter blowing process in the above-mentioned prior art, the present invention provides a method for removing arsenic and antimony in the process of copper matte converter blowing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Equipment: 100-ton PS converter (Φ4×10.7m);

[0044] Raw materials: (1) hot copper matte (Cu 57.95wt%, As 0.20wt%, Sb 0.18wt%); (2) self-produced cold material (Cu30.00wt%, As 0.17wt%, Sb 0.18wt%); ( 3) Quartz flux (SiO 2 86.00wt%); (4) Purchased blister copper (Cu97.20wt%, As 0.40wt%, Sb 0.25wt%); (5) Electrolytic residue (Cu 99.10wt%, As 0.15wt%, Sb0.08wt% ); (6) sodium sulfate (Na 2 SO 4 Purity 93.50%)

[0045] A method for removing arsenic and antimony in a copper smelter in Yunnan in the process of copper matte converter blowing, the specific steps include:

[0046] Step 1. 160 tons of hot copper matte (Cu 57.95wt%, As 0.20wt%, Sb 0.18wt%), 45 tons of self-produced cold material (Cu30.00wt%, As 0.17wt%, Sb 0.18wt%), 14 1 ton of quartz flux is added to a 100-ton PS converter for one-cycle routine operation of PS converter blowing, with a furnace temperature of 1150°C~1250°C and an air volume of 32,000Nm 3 / h, blowing air with 25% oxygen, blowing for 120 minut...

Embodiment 2

[0050] Equipment: 100-ton PS converter (Φ4×10.7m);

[0051] Raw materials: (1) hot copper matte (Cu 60.20wt%, As 0.22wt%, Sb 0.20wt%); (2) self-produced cold material (Cu30.00wt%, As0.26wt%, Sb0.14wt%); ( 3) Quartz flux (SiO 2 86.00wt%); (4) Purchased blister copper (Cu 97.10wt%, As0.41wt%, S b0.26wt%); (5) Electrolytic residue (Cu 99.20wt%, As 0.10wt%, Sb 0.08wt% %); (6) Sodium Sulfate (Na 2 SO 4 Purity 96.00%)

[0052] A method for removing arsenic and antimony in a copper smelter in Yunnan in the process of copper matte converter blowing, the specific steps include:

[0053] Step 1. 160 tons of hot copper matte (Cu 60.20wt%, As 0.22wt%, Sb 0.20wt%), 37 tons of self-produced cold material (Cu30.00wt%, As 0.26wt%, Sb 0.14wt%), 13 1 ton of quartz flux is added to a 100-ton PS converter for one-cycle routine operation of PS converter blowing, with a furnace temperature of 1150°C~1250°C and an air volume of 32,000Nm 3 / h, blowing air with 25% oxygen, blowing for 120 minut...

Embodiment 3

[0057] A method for removing arsenic and antimony in a copper smelter in Yunnan in the process of copper matte converter blowing, the specific steps include:

[0058] Step 1. 160 tons of hot copper matte (Cu 60.20wt%, As 0.22wt%, Sb 0.20wt%), 37 tons of self-produced cold material (Cu30.00wt%, As 0.26wt%, Sb 0.14wt%), 13 1 ton of quartz flux is added to a 100-ton PS converter for one-cycle routine operation of PS converter blowing, with a furnace temperature of 1150°C~1250°C and an air volume of 32,000Nm 3 / h, blowing air with 25% oxygen, blowing for 120 minutes to obtain white matte after slag removal and iron removal, and then transfer to the second cycle;

[0059] Step 2. After the start of the second cycle, white matte is added with 20 tons of purchased blister copper (Cu97.10wt%, As0.41wt%, Sb0.26wt%) and sodium sulfate according to the conventional ingredients of the smelter natural Glauber’s salt), after blowing for 20 minutes, add 20 tons of the second batch of crude ...

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Abstract

The invention relates to a method for desorption of arsenic and antimony in the blowing process of a copper matte converter and belongs to the technical field of copper smelting. In the first period of blowing of the copper matte converter, white matte is acquired according to conventional operation; and in the process of blowing the white matte and cold burden into crude copper in the second period, sodium sulfate is added for slag formation and desorption of arsenic and antimony, and the total adding amount of the sodium sulfate is 1%-3% of the mass of metal copper in furnace burden put intoa furnace. According to the method, in the copper making process in the second period of blowing of the converter, synchronous desorption of arsenic and antimony is implemented, hardly no equipment is added, the blowing system is not changed, and energy consumption increase is not obvious; and special emissions of arsenic and antimony slag is not needed at the end point of the copper making period, the arsenic and antimony slag enters a next procedure along with the crude copper to be subjected to oxidizing refining, and the blowing direct recycling rate of copper is not lowered.

Description

technical field [0001] The invention relates to a method for removing arsenic and antimony in the copper matte converter blowing process, belonging to the technical field of copper smelting. Background technique [0002] The rapid development of global copper smelting, the continuous mining of copper mines leads to less and less high-quality copper raw materials, and the copper-containing intermediate materials produced by other non-ferrous metal smelting processes are handed over to copper factories for treatment, resulting in increased and fluctuating copper raw material impurities. This is the main reason for the high impurities in arsenic and antimony in blister copper. In the current pyrometallurgical copper smelting process, iron olivine slag is usually used in the smelting process, mainly to complete the task of removing gangue and part of iron, and the distribution rate of arsenic and antimony in copper matte is relatively high. In the converter blowing process, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/06
CPCC22B15/0041C22B15/0054
Inventor 沈强华孔德颂刘大方陈雯郝战飞于海波毛庆何恩班卿杨世莹杨坤彬罗远富吕文帅朱鹏达招杨王家波
Owner KUNMING UNIV OF SCI & TECH
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