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Method for detecting content of iron in quartz sand by applying isothermal remanent magnetization

A technology of isothermal remanence and quartz sand, applied in the field of quartz sand processing, can solve the problems of inaccurate measurement results and adverse effects of measurement results, and achieve the effect of improving measurement accuracy and reducing influence.

Active Publication Date: 2017-05-10
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silica can adversely affect the measurement results, making the measurement results inaccurate

Method used

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  • Method for detecting content of iron in quartz sand by applying isothermal remanent magnetization

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Embodiment 1

[0036] A method for detecting iron content in quartz sand by using saturated isothermal residual magnetism, comprising the following steps:

[0037] (1) Clean and dry the quartz sand sample first, then grind it with a copper bowl, and pass it through a 700 mesh (about 20 μm) sieve to expose the iron impurity particles in the form of inclusions.

[0038] (2) Weigh 100 g of the sieved quartz sand sample and put it into a muffle furnace, heat it to 700° C., and then cool it to room temperature.

[0039] (3) Magnetically separate the cooled quartz sand with a 1.2T strong magnet, pour the magnetically separated material into a 500ml beaker, add 250ml of distilled water, fully stir with a non-magnetic glass rod, and then put it into an ultrasonic cleaning machine (40kHz, 200W ) in ultrasonic for 30 minutes, during the process of ultrasonic dispersion, continue to stir fully with a non-magnetic glass rod, then put a plastic tube equipped with a 1.2T strong magnetic field into the sam...

Embodiment 2

[0049] A method for detecting iron content in quartz sand by using saturated isothermal residual magnetism, comprising the following steps:

[0050] (1) Clean and dry the quartz sand sample first, then grind it with a copper bowl, and pass it through a 700 mesh (about 20 μm) sieve to expose the iron impurity particles in the form of inclusions.

[0051] (2) Weigh 100 g of the sieved quartz sand sample and put it into a muffle furnace, heat it to 700° C., and then cool it to room temperature.

[0052] (3) Magnetically separate the cooled quartz sand with a 1.2T strong magnet, pour the magnetically separated material into a 500ml beaker, add 250ml of distilled water, fully stir with a non-magnetic glass rod, and then put it into an ultrasonic cleaning machine (40kHz, 200W ) in ultrasonic for 30 minutes, during the process of ultrasonic dispersion, continue to stir fully with a non-magnetic glass rod, then put a plastic tube equipped with a 1.2T strong magnetic field into the sam...

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Abstract

The invention discloses a method for detecting content of iron in quartz sand by applying isothermal remanent magnetization, and relates to the technical field of processing of quartz sand. The method comprises the following steps of weighing 90-110 g of a sieved quartz sand sample, putting the sieved quartz sand sample into a muffle furnace, heating to 660-720 DEG C, and cooling to the room temperature; implementing magnetic separation and ultrasonic dispersion; centrifuging a solution and a solid particle in a beaker at a high speed, collecting magnetic separation substances at the lower part of a centrifuge tube; drying; respectively weighing 0.1 g, 0.2 g, 0.3 g, 0.4 g and 0.5 g of the magnetic separation substances, evenly mixing the five groups of magnetic separation substances with 5 g of glass sand; magnetizing; using a superconducting magnetometer to measure the saturation isothermal remanent magnetization, using a chemical method to measure the iron content; establishing a standard curve between the saturation isothermal remanent magnetization of the quartz sand and the content of the iron element; and taking 10 g of the to-be-measured quartz sand sample, measuring the saturation isothermal remanent magnetization, and calculating the content of the iron element in the quartz sand according to the standard curve. According to the method, the influences of silicon oxide on the measurement result can be reduced, and the measurement accuracy is improved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of quartz sand treatment, in particular to a method for detecting iron content in quartz sand by applying isothermal residual magnetism. [0003] Background technique: [0004] Quartz sand is an important non-metallic mineral raw material, which is mainly used for the production of glass. The most harmful element is iron. Iron impurities will cause great harm to the production and quality of glass, especially to the thermodynamics in the glass melting process. Properties and light transmittance of glass products. Therefore, the detection of iron content in quartz sand is an important part of product quality control. At present, chemical analysis methods (such as AAS, ICP-AES, etc.) are mainly used to detect the content of iron in quartz sand, and hydrofluoric acid is used to digest the quartz sand. However, this detection method has the characteristics of long detection time, high cost, and the use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/80G01N1/34G01N1/44
CPCG01N1/34G01N1/44G01N27/80
Inventor 李勇
Owner ANHUI SCI & TECH UNIV