Method for controlling arsenic in clean smelting of arsenic-containing gold-copper concentrate

A concentrate and gold-copper technology, which is applied in the field of arsenic control in the clean smelting of arsenic-containing gold-copper concentrate, can solve the problems of ineffective recovery of As2O3 and low purity of arsenic trioxide, and achieve the effect of increasing the dew point of SO3 and preventing equipment corrosion

Active Publication Date: 2022-04-08
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the existing technology and the treatment process of the above patents, a large amount of SO3 gas is produced under oxygen-enriched conditions, and the existing quenching arsenic collection process is used. During the quenching process, the SO3 dew point temperature in the flue gas will be high due to the high sulfur trioxide content in the flue gas. Low and condensation produces dilute acid, which causes the adhesion of smoke dust and dilute acid in subsequent equipment, and cannot effectively recover As2O3 in the flue gas
In addition, sodium salt is introduced into the absorbent used, and the purity of arsenic trioxide obtained is low

Method used

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  • Method for controlling arsenic in clean smelting of arsenic-containing gold-copper concentrate
  • Method for controlling arsenic in clean smelting of arsenic-containing gold-copper concentrate

Examples

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Embodiment 1

[0031] A method for controlling arsenic in the clean smelting of arsenic-containing gold-copper concentrate, comprising: a side blowing smelting system, a side blowing arsenic recovery system and a steel belt furnace refining system;

[0032] Side blowing melting system:

[0033] The gold-copper concentrate containing 1.5% arsenic is put into the side blowing smelting furnace, and at a high temperature of 1200°C, the oxygen-enriched air blown into the furnace reacts physically and chemically with the mixed charge to produce liquid copper matte, slag and flue gas, and copper The matte is sent to the blowing furnace, the slag is sent to the slag cooling field for cooling, and then sent to the slag beneficiation, the arsenic enters the flue gas in the gaseous form of arsenic trioxide, and the flue gas enters the quenching arsenic collection system after waste heat recovery and electric dust recovery; The rising flue of the blowing furnace is sprayed into an oxygen absorbent to re...

Embodiment 2

[0045] A method for controlling arsenic in the clean smelting of arsenic-containing gold-copper concentrate, comprising: a side blowing smelting system, a side blowing arsenic recovery system and a steel belt furnace refining system;

[0046] Side blowing melting system:

[0047] The gold-copper concentrate containing 1.8% arsenic is put into the side-blown smelting furnace, and at a high temperature of 1250°C, the oxygen-enriched air blown into the furnace reacts physically and chemically with the mixed charge to produce liquid copper matte, slag and flue gas. The matte is sent to the blowing furnace, the slag is sent to the slag cooling field for cooling, and then sent to the slag beneficiation, the arsenic enters the flue gas in the gaseous form of arsenic trioxide, and the flue gas enters the quenching arsenic collection system after waste heat recovery and electric dust recovery; The rising flue of the blowing furnace is sprayed into an oxygen absorbent to reduce the oxygen...

Embodiment 3

[0059] A method for controlling arsenic in the clean smelting of arsenic-containing gold-copper concentrate, comprising: a side blowing smelting system, a side blowing arsenic recovery system and a steel belt furnace refining system;

[0060] Side blowing melting system:

[0061] The gold-copper concentrate containing 2.0% arsenic is put into the side-blown smelting furnace, and at a high temperature of 1300°C, the oxygen-enriched air blown into the furnace reacts physically and chemically with the mixed charge to produce liquid copper matte, slag and flue gas, and copper The matte is sent to the blowing furnace, the slag is sent to the slag cooling field for cooling, and then sent to the slag beneficiation, the arsenic enters the flue gas in the gaseous form of arsenic trioxide, and the flue gas enters the quenching arsenic collection system after waste heat recovery and electric dust recovery; Oxygen absorbent is sprayed into the rising flue of the blowing furnace to reduce ...

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Abstract

The invention relates to a method for controlling arsenic in clean smelting of arsenic-containing gold-copper concentrate, which belongs to the field of chemical industry. Including: side blowing smelting system, side blowing arsenic collection system and steel belt furnace refining system; side blowing smelting system is used to process arsenic-containing gold and copper concentrate; side blowing furnace ascending flue is sprayed with pyrite powder to reduce oxygen in flue gas content, thereby reducing the content of sulfur trioxide; increasing the height of the quenching tower is conducive to the full contact between the absorbent and the flue gas to cool down; the absorbent uses water to improve the grade of arsenic trioxide, and the purity of arsenic trioxide reaches more than 95%; 95% Arsenic trioxide is treated in a steel belt furnace to obtain more than 99.5% refined arsenic trioxide.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for controlling arsenic in clean smelting of arsenic-containing gold-copper concentrate. Background technique [0002] At present, most of the arsenic-containing gold-copper concentrates are processed by roasting furnaces or oxygen-enriched bottom-blown furnaces. Roasting furnaces process arsenic-containing gold-copper concentrates to obtain roasting slag, which requires cyanide leaching and produces a large amount of cyanide tailings. The subsequent treatment is difficult and serious. polluted environment. Oxygen-enriched bottom-blown furnace treats arsenic-containing gold-copper concentrate, gold, silver and copper are fully recovered, and arsenic enters the flue gas in the gaseous form of As2O3, which needs to be properly treated before it can be discharged. [0003] CN201511006863.0 discloses a process for collecting arsenic from smelting flue gas containing sulfur ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C01B17/74C01G28/00B01D53/14
CPCC22B15/003C01G28/005C01B17/74B01D53/14C01P2006/80B01D2252/10B01D2258/025
Inventor 张俊峰解维平王雷初长青
Owner CENT SOUTH UNIV
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