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A method for removing arsenic and antimony in the process of converting 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: 2021-04-09
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 (Cu 30.00wt%, 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 (Cu97.10wt%, As 0.41wt%, Sb0.26wt%); (5) Electrolytic residue (Cu 99.20wt%, As 0.10wt%, Sb0.08wt% %); (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 (Cu 30.00wt%, 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...

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 (Cu 30.00wt%, 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 removing arsenic and antimony in the copper matte converter blowing process, belonging to the technical field of copper smelting. In the first cycle of copper matte converter blowing, white matte is obtained according to conventional operations. In the second cycle, white matte and cold material are blown into blister copper by adding sodium sulfate to form slag and remove arsenic and antimony. The total amount of sodium sulfate added is the furnace charge 1%~3% of the mass of copper in the interior metal. This method implements synchronous removal of arsenic and antimony during the second cycle of copper-making in converter blowing, hardly increases equipment, does not change the blowing system, and does not increase energy consumption significantly; when the end of the copper-making period reaches the end of the copper-making period, no special discharge of arsenic and antimony slag is required , with the blister copper into the next process for oxidation and refining, without reducing the direct yield of copper blowing.

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 Patents(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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