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Dry sieved material, and average particle size measuring method and sieving device thereof

A technology of screening device and average particle size, which is applied in the direction of measuring devices, analytical materials, chemical instruments and methods, etc., can solve the problem of gypsum particles being difficult to disperse, and achieve the effects of reducing experimental errors, simple structure and reasonable design

Inactive Publication Date: 2012-05-09
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that gypsum particles accumulate on the upper sieve surface and are difficult to disperse during the dry screening of gypsum, the invention provides a "preheating-screening-reheating-rescreening" while the outer wall of the standard sieve wraps the insulation material method, realize effective screening of gypsum in a dry room, and obtain results such as gypsum particle size distribution and average particle size

Method used

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  • Dry sieved material, and average particle size measuring method and sieving device thereof
  • Dry sieved material, and average particle size measuring method and sieving device thereof
  • Dry sieved material, and average particle size measuring method and sieving device thereof

Examples

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Effect test

Embodiment 1

[0021] Use the above-mentioned sieving device to lightly press and crush the agglomerated particles in the gypsum, and keep the temperature at 45°C for 15 hours, then cool to room temperature in a desiccator. Accurately weigh 35-45g of gypsum on the top sieve surface of standard sieve 1 wrapped with thermal insulation material, and cover with top cover 2. Place the standard sieve and the weighed gypsum at 50° C. to preheat for 50 minutes, and sieve on the vibrating sieve machine 4 for 10 minutes; the ambient air humidity of the vibrating sieve is 65%. After the sieving, put the standard sieve 1 and the gypsum sample at 50° C. to preheat for 40 minutes again, and sieve on the vibrating sieve machine 4 for 10 minutes. After the sieving, the gypsum particles of each layer of the sieve surface were collected on weighing paper, and the mass of the gypsum particles of each layer of the sieve surface was accurately weighed, and sieved three times in parallel. The measurement results ...

Embodiment 2

[0025] Using the same screening device as in Example 1, lightly press and crush the agglomerated particles in the gypsum, and keep the temperature at 45° C. for 15 hours, then cool to room temperature in a desiccator. Accurately weigh 35-45g of gypsum on the top sieve surface of standard sieve 1 wrapped with thermal insulation material. Standard sieve 1 from top to bottom, the hole size is 0.075, 0.063, 0.053, 0.045, 0.037, 0.030mm and the bottom tray 3, cover the top cover 2. Place the standard sieve 1 and the weighed gypsum at 50°C to preheat for 50 minutes, and sieve on the vibrating sieve machine 2 for 10 minutes; the ambient air humidity of the vibrating sieve is 80%; Preheat again at ℃ for 40 minutes, and sieve on vibrating screen machine 4 for 10 minutes. After the sieving, collect the gypsum particles of each layer of sieve surface on weighing paper, accurately weigh the mass of gypsum particles of each layer of sieve surface, and sieve in parallel. Three times, the m...

Embodiment 3

[0029] Using the same screening device as in Example 1, lightly press and crush the agglomerated particles in the gypsum, and keep the temperature at 45° C. for 15 hours, then cool to room temperature in a desiccator. Accurately weigh 35-45g of gypsum to wrap the top screen surface of standard sieve 1 of thermal insulation material. Cover 2. Place the standard sieve and the weighed gypsum at 50°C to preheat for 50 minutes, and sieve on the vibrating sieve machine 4 for 10 minutes; the ambient air humidity of the vibrating sieve is 65%; On weighing paper, accurately weigh the mass of gypsum particles on each layer of sieve surface, and sieve in parallel three times. The measurement results are shown in Table 3. The average particle sizes of gypsum are 0.0368mm, 0.042mm and 0.042mm respectively.

[0030] Table 3 Example 3 The mass of desulfurized gypsum on the sieve surface of each layer / g

[0031]

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Abstract

The invention discloses dry sieved gypsum and an average particle size measuring method thereof. The average particle size measuring method comprises the following steps of: accurately weighing dried desulfurization gypsum on the top layer sieving face of a standard sieve; after a top cover is covered and the standard sieve and the gypsum are pre-heated for 40 to 50 minutes at the temperature of 50 to 55 DEG C, sieving the gypsum for 5 to 10 minutes on a sieve shaker; after sieving, preheating the standard sieve and the gypsum again for 40 to 50 minutes, shaking the sieve for 5 to 10 minutes;and accurately weighing gypsum particles on each layer of sieving face, and calculating the average particle size of the gypsum. The invention also discloses a sieving device for the method. The method and the device have the characteristics of simpleness, high practicability, high speed, accuracy and the like and are also applied to the sieving and the measurement of the average particle size ofmaterials of which the particle sizes are 1 to 100 mu m, wherein the materials are easy to wet.

Description

technical field [0001] The invention belongs to the technical field of particle sample detection, and in particular relates to a method for dry sieving of gypsum and its average particle size measurement method. At the same time, the method is also suitable for the screening and average particle size measurement of other moisture-prone materials with a particle size range of 1-100 μm. Particle size measurement. Background technique [0002] In the experimental research and production practice in many fields such as chemical industry, materials, environmental protection, etc., the distribution and measurement of particle size are of great significance. At present, the methods for measuring particle size distribution mainly include sedimentation method, sieving method, microscope method and laser scattering method, etc. Among them, the microscope method and laser scattering method have a small range of particle size and high accuracy, but due to expensive equipment, they are n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B1/28B07B1/46G01N15/02G01N5/00
Inventor 杨有余莫建松盛海强程常杰
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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