Method for deeply removing arsenic, lead, zinc and tin through pyrogenic refining of crude copper

A pyro-refining and blister copper technology, which is applied in the field of deep removal of arsenic and zinc in the pyro-refining of lead, tin and blister copper. Good industrial application prospect and value, better removal effect and wide adaptability of raw materials

Active Publication Date: 2020-11-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN109971974A and CN109971975A make the blister copper refining process oxidize Fe by changing the feeding operation mode, by feeding in batches and oxidizing in batches 3 o 4 The problem of solid solution precipitation is effectively prevented, and Cu 2 O-FeO-SiO 2 The slag reduces the content of Pb and Bi impurities in anode copper, but the above refining method has limited removal depth of As and Sn impurities.
CN103243223A discloses a method for removing tin from blister copper, which is divided into preliminary oxidation and decontamination of fayalite slag, NaOH-NaNO 3 /KNO 3 Low temperature detinning, NaOH-NaNO 3 /KNO 3 Four steps of high temperature detinning and low temperature reduction operation, the process is long and the cost is high
CN209522889U discloses a tin removal device for blister copper production. Through equipmen

Method used

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  • Method for deeply removing arsenic, lead, zinc and tin through pyrogenic refining of crude copper
  • Method for deeply removing arsenic, lead, zinc and tin through pyrogenic refining of crude copper
  • Method for deeply removing arsenic, lead, zinc and tin through pyrogenic refining of crude copper

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Embodiment 1

[0051] A method for deeply removing arsenic, lead, zinc and tin by pyro-refining of blister copper comprises the following steps:

[0052] (1) Take 0.16g NaHCO respectively 3 , 0.16g CaCO 3 , 0.58g SiO 2 Mix well with 1.1g FeO, prepare particles with a particle size of 2-5mm for use; take 10g blister copper sample and 0.2g waste lead-copper alloy, fill them in an MgO crucible, and place them in a high-purity N 2 Under protection, heat at 1200°C until fully melted.

[0053] (2) Add the slagging agent particles into the molten copper, and inject CO and CO in the laboratory test 2 The mixed gas participates in the slagging reaction of impurities in the material, and the material system (oxygen potential) gradually rises to be the same as the gas phase. In this embodiment, the oxygen partial pressure of the system is controlled to 10 through the combination of gas ratio and temperature (1200°C). -5.5 Atm, keep warm for 2 hours, and control the temperature at 1200°C through a r...

Embodiment 2

[0056] A method for deeply removing arsenic, lead, zinc and tin by pyro-refining of blister copper comprises the following steps:

[0057] (1) Take 0.1g NaHCO respectively 3 , 0.12g CaCO 3 , 0.68g SiO 2 Mix well with 1.1g FeO, and prepare particles with a particle size of 5-8mm for use; take 10g crude copper sample and 0.05g crude lead, fill them in an MgO crucible, and place them in high-purity N 2 Under protection, heat at 1150°C until fully melted.

[0058] (2) Add the slagging agent particles into the molten copper, and pass in CO and CO 2 The mixed gas participates in the slagging reaction of impurities in the material, and the oxygen partial pressure (oxygen potential) of the material system gradually rises to be the same as that of the gas phase. In this embodiment, the oxygen partial pressure of the system is controlled to 10 through the combination of gas ratio and temperature (1150°C). -6.5 atm, heat preservation for 2 hours; after the heat preservation is over, ...

Embodiment 3

[0061] A method for deeply removing arsenic, lead, zinc and tin by pyro-refining of blister copper comprises the following steps:

[0062] (1) Take 0.06g NaHCO respectively 3 , 0.10g CaCO 3 , 0.74g SiO 2 Mix well with 1.1g FeO, and prepare particles with a particle size of 1-4mm for use; take 10g of crude copper sample and 0.3g of waste battery grid, fill them in MgO crucible, and place them in high-purity N 2 Under protection, heat at 1250°C until fully melted.

[0063] (2) Add the slagging agent particles into the molten copper, and pass in CO and CO 2 The mixed gas participates in the slagging reaction of impurities in the material, and the oxygen partial pressure (oxygen potential) of the material system gradually rises to be the same as that of the gas phase. In this embodiment, the oxygen partial pressure of the system is controlled to 10 through the combination of gas ratio and temperature (1250°C). -6 atm, heat preservation for 2 hours; after the heat preservation ...

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Abstract

The invention discloses a method for deeply removing arsenic, lead, zinc and tin by pyrogenic refining of crude copper. The method comprises the following steps of (1) adding scrap lead materials intothe crude copper, and performing heating to completely melt the materials; (2) blowing a deslagging agent and an oxidizing agent into a crude copper melt, completing oxidizing slagging and impurity removal, and performing deslagging; and (3) blowing a reducing agent into copper liquid treated in the step (2), carrying out reduction deoxidation operation, then carrying out deslagging, and castingthe copper liquid into an anode plate. The method is wide in raw material adaptability, easy to operate, low in cost, easy to be compatible with an existing process, good in removal effect on the arsenic, the lead, the zinc and the tin, and good in industrial application prospect and value.

Description

technical field [0001] The invention belongs to the technical field of pyrometallurgy and resource recycling of nonferrous metals, and relates to a method for deep removal of arsenic, lead, zinc and tin by pyro-refining of blister copper. Background technique [0002] Pyrochemical copper smelting generally includes matte smelting, matte blowing and anode refining to produce anode plates for electrolytic refining. Blister copper pyro-refining is a necessary early stage of the normal electrolysis process, and it has the functions of removing impurities, regulating the quality of anode copper, and treating anode anode and scrap copper. The ability of the copper electrolysis system to deal with impurities is limited by equipment and processes, and it is difficult to deal with anode copper with high impurity content. At the same time, there are strict requirements on the types of impurities. Therefore, impurities must be removed efficiently during the crude copper refining stage....

Claims

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Application Information

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IPC IPC(8): C22B15/14
CPCC22B15/0052C22B15/006Y02P10/20
Inventor 夏隆巩刘志宏于智谦武岑阳俞峰王凯
Owner CENT SOUTH UNIV
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