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