Method for measuring content of tungsten and molybdenum in ore

A determination method, the technology of tungsten and molybdenum, which is applied in the field of ore composition analysis, can solve the problems that the content of tungsten and molybdenum cannot be accurately measured at the same time, so as to reduce the experimental cost, simplify the experimental procedure and improve the test speed.

Inactive Publication Date: 2016-10-12
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the current problem that the content of tungsten and molybdenum in ores cannot be accurately measured at the same time, the invention provides a method for determining the content of tungsten and molybdenum in ores. The specific steps are as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Measure the standard sample numbered GBW07284 (molybdenum content is 1.51%, tungsten content is 0.36%), weigh 0.20g of sample, accurate to 0.1mg, put it into a 30mL polytetrafluoro beaker, add a small amount of water to wet, Add 5mL of hydrochloric acid, 3mL of nitric acid, 3mL of hydrofluoric acid, and 2mL of perchloric acid in sequence, and soak the sample overnight. Place the PTFE beaker on an electric furnace at 230°C and heat it until white smoke rises, then remove the crucible and let it cool slightly. Add 20 mL of hydrochloric acid-oxalic acid solution to the crucible, and use deionized water to rinse the crucible wall. Boil and dissolve salts on a hot plate, remove and cool, dilute to 100mL colorimetric tube, shake well, use ICP-AES to simultaneously measure the content of tungsten and molybdenum, the calculated molybdenum content is 1.49%, and the tungsten content is 0.37%. When using ICP-AES, the mixed standard series solution of tungsten and molybdenum is pr...

Embodiment 2

[0021] Measure the standard sample numbered GBW07238 (molybdenum content is 0.0085%, tungsten content is 3.66%), weigh 0.10g of the sample, accurate to 0.1mg, put it in a 30mL polytetrafluoro beaker, add a small amount of water to wet it, Add 5mL of hydrochloric acid, 3mL of nitric acid, 3mL of hydrofluoric acid, and 2mL of perchloric acid in sequence, and soak the sample overnight. Place the PTFE beaker on an electric furnace at 230°C and heat it until white smoke rises, then remove the crucible and let it cool slightly. Add 20 mL of hydrochloric acid-oxalic acid solution to the crucible, and use deionized water to rinse the crucible wall. Boil and dissolve salts on a hot plate, remove and cool, dilute to 100mL colorimetric tube, shake well, use ICP-AES to simultaneously measure the content of tungsten and molybdenum, the calculated molybdenum content is 0.0087%, and the tungsten content is 3.67%. When using ICP-AES, the mixed standard series solution of tungsten and molybde...

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Abstract

The invention discloses a method for measuring the content of tungsten and molybdenum in ore. After being weighed, a sample is soaked in mixed acid of hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid, heated and dissolved at 200-230 DEG C, then disgested, and finally dried by distillation into a wet salt shape; finally, a complex is generated from tungsten through an oxalic acid and hydrochloric acid mixed solution. After capacity is fixed, an inductively coupled plasma-atomatic emission spectrometry (ICP-AES) is used for measuring the content of tungsten and molybdenum. By means of the method, the content of the two elements can be measured at the same time, and the problem that at present, the two elements can not be accurately measured at the same time is solved. In addition, by means of the method, high-temperature and strong-alkali operation is avoided, experiment procedures are simplified, experiment cost is reduced, test speed of the sample is increased, and work efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of ore composition analysis. Background technique [0002] Tungsten and molybdenum are very important index elements in ore. The traditional method uses strong alkali melting and spectrophotometry to measure the amount of tungsten and molybdenum respectively. The pretreatment of samples is relatively complicated and the test cost is high, which has certain risks. Especially when the content of molybdenum in the sample is high, the molybdenum must be separated before determining the amount of tungsten, otherwise the colorimetric result will be seriously affected. There is a small amount of simultaneous determination of tungsten and molybdenum using ICP-AES, but due to the extremely low solubility of tungsten in acidic solution (formation of tungstic acid precipitation), the measured tungsten amount is very unstable. Therefore, it is of great significance to invent an efficient and accurate method for the sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
CPCG01N21/73G01N1/28
Inventor 高振广孟宪伟葛仲义颜凯
Owner CHANGCHUN GOLD RES INST
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