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Production method of high-purity dense arsenopyrite electrode

An arsenopyrite and dense technology is applied in the field of preparation of high-purity dense arsenopyrite electrodes, which can solve the problems that arsenopyrite minerals are difficult to meet the conditions.

Active Publication Date: 2019-09-20
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a high-purity dense arsenopyrite electrode, so as to solve the problem that the preparation of a high-purity arsenopyrite electrode in the prior art has become a necessary condition for electrochemical corrosion research. The experimental research of high-voltage electrochemistry also requires arsenopyrite minerals to have good pressure-holding properties, and natural arsenopyrite minerals are difficult to meet technical problems such as conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A kind of preparation method of high-purity dense arsenopyrite electrode

[0028] Step 1, selecting arsenopyrite ore particles;

[0029] Step 2, washing the selected arsenopyrite particles and drying them for later use;

[0030] Step 3. Grind the dried arsenopyrite ore into a powder of more than 200 meshes, weigh 0.8-1.0 g of arsenopyrite powder ore, press it into arsenopyrite cylinder in a powder tablet press, and then wrap it with silver foil;

[0031] Step 4, pressing the arsenopyrite cylinder wrapped in silver foil into boron nitride to make a boron nitride cylinder containing the arsenopyrite cylinder wrapped in silver foil;

[0032] Step 5. Put the boron nitride cylinder containing the arsenopyrite cylinder wrapped in silver foil into the high-pressure assembly of the pyrophyllite block;

[0033] Step 6, heat and pressurize sintering in a large cavity press;

[0034] Step 7. After the sintering is completed, the silver foil on the surface of the sample can be r...

Embodiment example 1

[0048] The ore containing arsenopyrite is crushed into 40-80 meshes, and the arsenopyrite with a purity of more than 98% is selected under a binocular microscope. Clean it ultrasonically with absolute ethanol for 10-20 minutes, take it out and clean it with absolute ethanol, and then dry it in a vacuum oven at 50°C. Add the weighed arsenopyrite powder into a cylindrical mold for powder compression, compact in a powder tablet press for 2 minutes at 0.5 MPa, take out the arsenopyrite cylinder from the mold, and wrap it with silver foil. Press the arsenopyrite cylinder wrapped in silver foil into the hole of the boron nitride cylinder, and cover the upper and lower ends of the boron nitride cylinder with boron nitride discs with a thickness of 3-5mm. A boron nitride cylinder containing a silver foil-wrapped arsenopyrite cylinder was placed into a pyrophyllite block high pressure assembly. Specific assembly operation process:

[0049] Punch a circular hole with a diameter of 20...

Embodiment example 2

[0055] The ore containing arsenopyrite is crushed into 40-80 meshes, and the arsenopyrite with a purity of more than 98% is selected under a binocular microscope. Clean it ultrasonically with absolute ethanol for 10-20 minutes, take it out and clean it with absolute ethanol, and then dry it in a vacuum oven at 50°C. Add the weighed arsenopyrite powder into a cylindrical mold for powder compression, compact in a powder tablet press for 2 minutes at 0.5 MPa, take out the arsenopyrite cylinder from the mold, and wrap it with silver foil. Press the arsenopyrite cylinder wrapped in silver foil into the hole of the boron nitride cylinder, and cover the upper and lower ends of the boron nitride cylinder with boron nitride discs with a thickness of 3-5mm. A boron nitride cylinder containing a silver foil-wrapped arsenopyrite cylinder was placed into a pyrophyllite block high pressure assembly. Specific assembly operation process:

[0056] Punch a circular hole with a diameter of 2...

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Abstract

The invention discloses a production method of a high-purity dense arsenopyrite electrode. The production method of the high-purity dense arsenopyrite electrode comprises the steps of selecting arsenopyrite ore particles; cleaning the selected arsenopyrite ore particles, and then drying the arsenopyrite ore particles for use; grinding the dried arsenopyrite ore into powder in meshes of 200 or above, weighing 0.8-1.0 g of the powdery arsenopyrite ore, and after the powdery arsenopyrite ore is compressed into arsenopyrite cylinders in a powder compressing machine, wrapping the arsenopyrite cylinders with silver foil; pressing the arsenopyrite cylinders wrapped with the silver foil into boron nitride to produce boron nitride cylinders which contain the arsenopyrite cylinders wrapped with the silver foil; placing the boron nitride cylinders which contain the arsenopyrite cylinders wrapped with the silver foil into a pyrophyllite lump high-pressure assembly; conducting sintering at high temperature and high pressure in a large-cavity press machine; and stripping off the surface silver foil of a sample subjected to sintering to produce the arsenopyrite electrode. The technical problems that high-temperature and high-pressure electrochemistry experiment research on arsenopyrite requires good pressure maintaining performance of arsenopyrite ore, however, natural arsenopyrite ore hardly meets the condition, and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of electrode preparation, in particular to a method for preparing a high-purity dense arsenopyrite electrode. Background technique [0002] Arsenopyrite is the most common sulfur-arsenic compound in nature. The weathering of arsenopyrite will cause the release of arsenic, leading to surface and groundwater pollution, threatening the ecological environment and human health. Studying the electrochemical corrosion behavior of arsenopyrite in a hydrothermal system helps to understand the generation, composition and change process of hydrothermal deposits, and provides a theoretical basis for high-temperature hydrometallurgy and mineral processing processes. , arsenic, sulfur geochemical cycle, mining and the protection of the natural environment are closely related. [0003] Arsenopyrite is symbiotic with cassiterite, wolframite and bismuthite in high-temperature hydrothermal deposits; it is symbiotic with pyrr...

Claims

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Application Information

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IPC IPC(8): C04B35/547C04B35/622C04B35/626C04B35/645
CPCC04B35/547C04B35/622C04B35/62605C04B35/645C04B2235/6567
Inventor 李和平郑凯刘庆友王帅
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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