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Method for detecting content of trace iron in quartz sand

A technology of trace iron and quartz sand, applied in the field of quartz sand treatment, can solve the problems of low accuracy, unfavorable determination of high-purity quartz sand, complicated process, etc., and achieves the effects of reducing measurement cost, accurate and rapid determination, and simple process

Inactive Publication Date: 2020-12-01
湘潭华辰仪器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these determination methods can detect the content of iron in quartz sand, but for trace amounts of Fe 2 o 3 The determination has the defect of low accuracy, and the process is cumbersome and the consumption cost is high, which is not conducive to the determination of trace iron in high-purity quartz sand.

Method used

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  • Method for detecting content of trace iron in quartz sand
  • Method for detecting content of trace iron in quartz sand
  • Method for detecting content of trace iron in quartz sand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: a method for detecting trace iron content in quartz sand, comprising the following steps:

[0044] S1. Prepare the sample to be tested

[0045]Weigh 750 ± 5 mg of siliceous sandstone with an iron content below 0.05%, put it into a 50ml polytetrafluoroethylene bottle 7 resistant to high temperature and high pressure, add 5ml of concentrated hydrofluoric acid, tighten the bottle cap and put it in a microwave oven. After the siliceous sandstone is completely decomposed (about 25-30 minutes), it is taken out, and the sample to be tested is obtained after being cooled by a water cooling device.

[0046] Further preferably, the polytetrafluoroethylene bottle 7 can be a material bottle of various geometric shapes such as an Erlenmeyer flask and a flask.

[0047] Further preferably, during the heating process of the microwave oven, a medium-low fire is selected, and the emitted microwave intensity is 750W×33%.

[0048] S2, Fe reagent 2 preset

[0049] Preparati...

Embodiment 2

[0068] Embodiment 2: A method for detecting trace iron content in quartz sand. The difference from Embodiment 1 is that the siliceous sandstone weighs 380±5 mg, and the iron content is between 0.05-0.1%.

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Abstract

The invention discloses a method for detecting the content of trace iron in quartz sand, and belongs to the technical field of quartz sand treatment. The method comprises the following steps: preparing a sample to be detected: weighing siliceous sandstone, putting the siliceous sandstone into a polytetrafluoroethylene bottle, adding concentrated hydrofluoric acid, putting the siliceous sandstone into a microwave oven, taking out after the siliceous sandstone is completely decomposed, and cooling to obtain the sample to be detected; presetting a Fe reagent 2: weighing 0.6 g of the Fe reagent 2,putting the Fe reagent 2 into a 30ml lightproof plastic bottle, adding ethanol and water, and shaking until the Fe reagent 2 is completely dissolved to obtain the preset Fe reagent 2; presetting a Fereagent 1: measuring 10 ml of the Fe reagent 1, and adding 3 drops of 3% ascorbic acid to obtain the preset Fe reagent 1; and developing and measuring: adding 0.2 ml of the preset Fe reagent 2 into the preset Fe reagent 1 obtained in the step S3, uniform shaking, adding the sample to be detected, and measuring through a measuring instrument after uniform shaking. The process is simple, and the measurement of trace iron in the high-purity quartz sand is facilitated.

Description

technical field [0001] The invention relates to the technical field of quartz sand treatment, more specifically, it relates to a method for detecting trace iron content in quartz sand. Background technique [0002] Quartz sand is a kind of non-metallic mineral, which is a hard, wear-resistant, and chemically stable silicate mineral. The color of quartz sand is milky white, or colorless and translucent, with a Mohs hardness of 7. Quartz sand is an important industrial mineral raw material, non-chemical dangerous goods, widely used in glass, casting, ceramics and fireproof materials, ferrosilicon smelting, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives, filter materials and other industries. [0003] The main component in quartz sand is quartz, SiO 2 The content of carbon dioxide is more than 90-99%, and the impurities mainly include iron, aluminum, titanium, calcium, magnesium and sodium. Due to the special requirements for the...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N1/28
CPCG01N1/28G01N21/78
Inventor 聂华
Owner 湘潭华辰仪器有限公司
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