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Method for measuring and calculating radius-thickness ratio of fine sheet mineral

A technology of diameter-thickness ratio and lamella, which is applied in the field of industrial testing and research of powder materials, can solve problems such as heavy workload, high testing cost, and large testing error, and achieve the effects of reduced workload, short testing time and high precision

Inactive Publication Date: 2015-07-15
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] The present invention provides a method for measuring the diameter-thickness ratio of micro-layered minerals in order to solve the problems of heavy workload, large test error and high test cost in the existing measuring technology of the diameter-thickness ratio of the lamellar minerals

Method used

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  • Method for measuring and calculating radius-thickness ratio of fine sheet mineral
  • Method for measuring and calculating radius-thickness ratio of fine sheet mineral
  • Method for measuring and calculating radius-thickness ratio of fine sheet mineral

Examples

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Effect test

example 1

[0056] Taking the Zhangjiakou kaolinite sample as an example, the average pulse height of the kaolinite (value equal to the particle size) dc = 1.009 μm was measured by a Coulter multisizer3 particle size analyzer. The SEM image of kaolinite was obtained by Hitachi S-4800 scanning electron microscope. By observing and marking 100 kaolinite particles in the SEM image, the average bottom surface diameter d=2.12μm was obtained, and the result brought into the formula was 13.91.

example 2

[0060] Taking the Xuanhua kaolinite sample as an example, the average pulse height of the kaolinite (the value is equal to the particle size) dc = 1.65 μm was measured by a Coulter multisizer3 particle size analyzer. The SEM image of kaolinite was obtained with a Hitachi S-4800 scanning electron microscope. By observing and marking 100 kaolinite particles in the SEM image, the average bottom diameter d=4.23 μm was obtained, and the result brought into the formula was 25.27.

example 3

[0064] Taking a mica sample as an example, the average pulse height of the mica (the value is equal to the particle diameter) dc=3.23 μm is obtained by testing with a Coulter multisizer3 particle size analyzer. The SEM image of mica was obtained by using a Hitachi S-4800 scanning electron microscope. By observing and marking 100 mica particles in the SEM image, the average bottom diameter d=11.22 μm was obtained, and the result brought into the formula was 62.87.

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Abstract

The invention provides a method for measuring and calculating the radius-thickness ratio of fine sheet mineral. The method comprises the following steps: preparing a solution of a sample, dispersing, preparing a suspension, and measuring and calculating the radius-thickness ratio. The particle size dc of an equivalent sphere is obtained according to the pulse height through adopting a resistance method principle. The diameter d of the bottom of the sample is obtained by adopting an image technology. A formula derivation process comprises the following steps: obtaining the volume V of the sample according to the particle size dc of the equivalent sphere and a spherical formula; allowing the sheet sample to be equivalent to a circular disk shape (column with a very small height), and obtaining the bottom area S according to the diameter d of the bottom of the circular disk; obtaining the thickness h of the circular disk according to a column volume formula; and obtaining the radius-thickness ratio of 3(d / dc)<3> / 2 according to a radius-thickness ratio definition that the radius-thickness ratio is a ratio of the bottom diameter of the sheet mineral to the thickness of the sheet mineral. The method has the advantages of simple work mode, small workload, clear principle, small artificial factors, simple formula and high popularization.

Description

technical field [0001] The invention relates to the field of industrial testing and research of powder materials, in particular to a method for measuring and calculating the diameter-thickness ratio of fine lamellar minerals. Background technique [0002] The basis of the thickness ratio test of sheet minerals is the test of mineral particle size. The existing particle size test methods mainly include sedimentation method, hydrometer method, sieving method, laser method, image method, electrical resistance method, and air permeability method. Among them, the electrical resistance method is the only particle size test method that can measure the mineral volume in three dimensions, and the image method is the only test method that can directly observe the mineral morphology and particle size. [0003] The resistance method is to let the measured particles pass through the small hole of the small hole tube to discharge the same volume of electrolyte. The measured particle resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 江发伟刘钦甫程宏飞张志亮
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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