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A bauxite sample preparation method for scanning electron microscope and energy spectrum research

A technology of scanning electron microscopy and bauxite, which is applied in the field of scanning electron microscopy sample preparation, can solve difficult problems such as distinguishing mineral types, etc.

Active Publication Date: 2012-02-01
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the analysis of the conventional chemical composition of the imported ore, it is also necessary to understand the structure and distribution status of various minerals in the raw ore. The current bauxite sample preparation methods mainly include: 1. The powder sample mainly adopts direct dispersion Put it on the carbon conductive glue, and then observe after evaporating carbon, but after this treatment, some very fine particles adhere to the surface of the mineral, and it is difficult to distinguish the type of mineral by energy spectrum; 2. The bulk samples are mainly selected from fresh sections for View after carbon plating treatment, so that the current fault is limited to observation, it is necessary to select a large number of particles of different colors for research, in order to obtain a wide range of representation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Laos bauxite, first of all, used electron microscope and energy spectrum to study the massive ore, mainly gibbsite and aluminum goethite, containing hematite, kaolinite, quartz, ilmenite, anatase Minerals such as ore, except for the finer iron minerals, the particle size of each mineral is basically distributed between 60-150 μm, select 80% to pass through a sieve of about 80 μm, so that all the minerals are sieved, and then put the minerals in 60 μm copper Put it on the carrier net device, suspend it in the absolute ethanol solution, ultrasonically clean it for 10-15 minutes, add a certain amount of non-ionic polyacrylamide flocculant, take out the carrier net after standing for 5 minutes, and process the carrier net into samples The size of the stage is directly placed on the sample stage after carbon plating treatment.

Embodiment 2

[0019] Guinea bauxite, firstly use electron microscopy and energy spectrum to study the massive ore, mainly gibbsite and gibbsite, containing hematite, kaolinite, quartz, boehmite, Minerals such as mica, except for the finer iron minerals, the particle size of each mineral is basically distributed between 80-200 μm, select 80% to pass through a sieve of about 90 μm, so that all the minerals are sieved, and then put the minerals in 80 μm copper Put it on the carrier net device, suspend it in the absolute ethanol solution, ultrasonically clean it for 10-15 minutes, add a certain amount of non-ionic polyacrylamide flocculant, take out the carrier net after standing for 5 minutes, and process the carrier net into samples The size of the stage is directly placed on the sample stage after carbon plating treatment.

Embodiment 3

[0021] Russian bauxite, first of all, used electron microscopy and energy spectrum to study the massive ore, mainly diaspore and hematite, containing kaolinite, quartz and other minerals, in addition to finer iron minerals The particle size of each mineral outside is basically distributed between 40-100 μm. Select 80% to pass through a sieve of about 50 μm to sieve all the minerals. In anhydrous ethanol solution, ultrasonically clean for 10-15 minutes, add a certain amount of non-ionic polyacrylamide flocculant, take out the carrier net after standing for 5 minutes, process the carrier net into the size of the sample stage and place it directly on the sample stage after carbon plating treatment .

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PUM

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Abstract

The invention relates to a bauxite sample preparation method for scanning electron microscopy and energy spectrum research, which is characterized in that the steps of the product process include: (1) crushing and grinding the bauxite sample until the particle size is below 200 μm; 2) pass the ground mineral through a 140 mesh sieve, and get the undersize; (3) pass the obtained undersize through a 650 mesh sieve, and get the oversize; (4) subject the obtained oversize to a scanning electron microscope and energy spectrum measurements. The present invention improves the current general sample preparation method, and uses the method of removing fine particles after crushing ore to obtain various minerals with better crystallization, so as to ensure that various minerals in bauxite can be discovered and identified, and at the same time can Summarize the microstructure of various minerals and provide technical support for mineral geological work.

Description

technical field [0001] A bauxite sample preparation method for scanning electron microscope and energy spectrum research relates to a scanning electron microscope (SEM) sample preparation method. Background technique [0002] With the increasing consumption of high-quality bauxite resources in my country, the trend of bauxite imports will gradually take shape. The world's bauxite resources are mainly concentrated in Australia, Laos, Russia and other countries. In addition to the analysis of the conventional chemical composition of the imported ore, it is also necessary to understand the structure and distribution status of various minerals in the raw ore. The current bauxite sample preparation methods mainly include: 1. The powder sample mainly adopts direct dispersion Put it on the carbon conductive glue, and then observe after evaporating carbon, but after this treatment, some very fine particles adhere to the surface of the mineral, and it is difficult to distinguish the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/34
Inventor 仓向辉石磊郭永恒
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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