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Research method of silver selenide in copper anode slime refining

A technology of copper anode slime and silver selenide, applied in chemical instruments and methods, selenium/tellurium compounds, metal selenides/tellurides, etc., can solve the problem of lack of systematic research methods for the smelting thermodynamics of selenium-rich materials, Achieve reliable research methods and high-precision results

Pending Publication Date: 2022-03-01
冯大伟
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the thermodynamic research of anode slime smelting is seldom paid attention to, resulting in the lack of a systematic research method for the smelting thermodynamics of this selenium-rich material. Therefore, the present invention proposes a research method for silver selenide in copper anode slime refining. Solve the problems existing in the existing technology

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  • Research method of silver selenide in copper anode slime refining
  • Research method of silver selenide in copper anode slime refining
  • Research method of silver selenide in copper anode slime refining

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Embodiment 1

[0023] according to figure 1 As shown, the present embodiment provides a method for researching silver selenide in copper anode slime refining, comprising the following steps:

[0024] Step 1, intermetallic compound Ag 2 The synthesis of the Se phase, the purity is that 99.99% silver powder and the purity are that 99.999% selenium powder is mixed and sealed in the glass ampoule bottle of vacuum quartz according to the molar ratio of 2:1, then with the speed of 4K / min, the ampoule bottle is heated from room temperature to Store at 673K ​​for two days, then heat the ampoule to 873K, keep it warm at this temperature for two days, and finally heat it to 1173K for one hour and then cool it to room temperature, and check the uniformity of the synthesized phase mixture by scanning electron microscopy and energy spectrometer , to obtain the intermetallic compound Ag 2 Se phase, and then under a pressure of 0.1GPa, use 1% excess amount of selenium atoms to grind the compound, and uni...

Embodiment 2

[0030] according to figure 2 As shown, the present embodiment provides the structure of a tubular furnace in the research method of silver selenide in the refining of copper anode slime, including a tubular furnace body 1, a quartz glass furnace tube 2, a sealing cover 3, and an inert gas inlet and outlet 4 , platinum resistance thermometer 5 and platinum wire 6, a quartz glass furnace tube 2 is arranged in the tubular furnace body 1, and a sealing cover 3 is provided at both ends of the quartz glass furnace tube 2, and the side of the sealing cover 3 is connected to the quartz glass furnace tube 2. The inert gas inlet and outlet 4, the sealing cover 3 is provided with a platinum resistance thermometer 5, and the quartz glass furnace tube 2 is provided with a platinum wire 6.

[0031] The middle part of the quartz glass furnace tube 2 is provided with a solid electrolyte 7, and the two sides of the solid electrolyte 7 are respectively provided with a sample system 8 and a ref...

Embodiment 3

[0033] The present embodiment provides the expansion of the research method of silver selenide in a kind of copper anode slime refining, in the embodiment 1, the solid electrolyte when solid pure silver and selenium form silver selenide is measured, and its reaction is by formula (1) Given, the actual reaction of the electrochemical cell is the electromotive force of the cell

[0034] 2Ag(s)+Se(s)=Ag 2 Se(s) (1)

[0035] (-)Pt∣Ag(s)∣RbAg 4 I 5 (s)∣Ag 2Se(s), Se(s,l)∣Pt(+)

[0036] In the temperature range of 350K-500K and under the ambient atmospheric pressure, in addition to the volume expansion work, the Gibbs energy change of the cell body reaction is related to the reversible electromotive force of the reaction (1), according to the Nentes equation

[0037]

[0038] In the formula, E is the electromotive force generated by the battery, and F is the Faraday constant 96485C.mol -1 , the number of potential changes transferred in the battery reaction is z=2. It can ...

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Abstract

The invention discloses a research method of silver selenide in copper anode slime refining. The research method comprises the steps of 1, synthesis of an intermetallic compound Ag2Se phase, 2, synthesis of a solid electrolyte RbAg4I5, 3, electromotive force measurement and 4, temperature measurement. According to the method, the numerical value of the Ag2Se standard thermodynamic function in the solid-state primary battery taking the super-ionic conductor RbAg4I5 as the solid electrolyte is measured by using an electromotive force method, higher precision is provided based on advanced electromotive force battery design and direct control of the temperature difference of the solid electrolyte, and through an interpolation experiment of the electromotive force and Ag2Se, the accuracy of the solid-state primary battery is improved. The equilibrium temperature data of the polymorphic phase change from alpha-Ag2Se to beta-Ag2Se is determined, which indicates that the RbAg4I5 is a suitable solid electrolyte in a low-temperature electromotive force method, and a reliable research method is provided for thermodynamic research of anode slime smelting.

Description

technical field [0001] The invention relates to the technical field of equipment, in particular to a research method for silver selenide in copper anode slime refining. Background technique [0002] Anode slime is a by-product of copper anode electrolytic refining, which contains a large amount of rare and precious metals such as silver, gold, platinum group metals and selenium. The ore slime usually contains 5-53% copper, 5-20% silver, and up to 1% Gold, selenium 1-45% and 2-30% lead, and a small amount of tellurium, sulfur, arsenic, bismuth, antimony and nickel, the silver part exists in the state of metal, combined with selenium to form silver selenide and silver copper selenide, Copper exists in the metal state of sulfate or oxide, and is combined with copper selenide and silver selenide. Lead mainly exists in the form of lead sulfate. The main purpose of anode slime treatment is to remove copper, selenium, tellurium, etc. Silver, gold and platinum group metals are left...

Claims

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Application Information

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IPC IPC(8): G01N27/417G01N27/416G01N25/20C01B19/00C01G5/00
CPCG01N27/417G01N27/4161G01N25/20C01B19/007C01G5/006Y02P10/20
Inventor 冯大伟
Owner 冯大伟
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