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Method for simultaneously determining harmful elements in iron ore

A technology for harmful elements and iron ore, applied in the field of quantitative analysis in analytical chemistry, it can solve the problems of complicated operation and processing steps, low sensitivity and poor reproducibility, and achieve the effect of reducing solvent consumption, high sensitivity and high accuracy

Inactive Publication Date: 2012-07-11
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical defects of cumbersome operation and processing steps, low sensitivity, poor stability and reproducibility existing in the determination process of the existing method, and provide a method for simultaneously determining harmful elements in iron ore. Fast speed, high sensitivity, accurate results, and beneficial to environmental protection and human health

Method used

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  • Method for simultaneously determining harmful elements in iron ore
  • Method for simultaneously determining harmful elements in iron ore
  • Method for simultaneously determining harmful elements in iron ore

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Determination of Na, K, Pb, Zn element content in iron ore national standard sample GSBH 30002-97:

[0027] 1. Samples processed by microwave digestion: Accurately weigh 0.1000g of iron ore sample, put it in a microwave digestion tank cleaned by acid boiling, add 10mL of hydrochloric acid (1:1) and 3mL of nitric acid in sequence after the second sub-boiling distillation, Hydrofluoric acid 1mL, assemble the digestion tank, and prepare a blank sample at the same time, place the microwave digestion tank in the microwave digestion instrument; turn on the microwave digestion instrument, set the program as: power 1000W, temperature 200°C, and the heating program is 3min to 150°C, hold the temperature for 3 minutes, then raise the temperature to 200°C for 5 minutes, and start to cool down after holding the temperature for 10 minutes. After the digestion is complete, take out the digestion tank when the temperature drops to room temperature, transfer the test solution to a 100m...

Embodiment 2

[0045] Embodiment 2: the mensuration of actual iron ore sample Na, K, Pb, Zn element content:

[0046] 1. Accurately weigh 0.1000g of four iron ore samples, place them in a microwave digestion tank cleaned by acid boiling, and add 10mL of hydrochloric acid (1:1) after the second sub-boiling distillation, 3mL of nitric acid, hydrofluoric acid 1mL, assemble the digestion tank, and prepare a blank sample at the same time, place the microwave digestion tank in the microwave digestion instrument; turn on the microwave digestion instrument, set the program as: power 1000W, temperature 200°C, and the heating program is 3min to 150°C, Keep the temperature constant for 3 minutes, then raise the temperature to 200°C for 5 minutes, and start to cool down after 10 minutes of constant temperature. After the digestion is complete, take out the digestion tank when the temperature drops to room temperature, transfer the test solution to a 100mL plastic volumetric flask, and constant volume. ...

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Abstract

The invention discloses a method for simultaneously determining harmful elements in iron ore. The method comprises the following steps of: processing a sample through microwave digestion; under optimized instrument working conditions, drawing a standard curve by a standard addition method to correct the matrix effect; and simultaneously determining the harmful elements including sodium, potassium, lead and zinc in the iron ore by use of an inductive coupling plasma mass spectrometer. Through the invention, the problems of complicated operation and processing steps, low sensitivity, low stability, poor reproducibility and the like in the former determining process are solved; and the method disclosed by the invention has the characteristics of fast determination, high sensitivity and accurate result, and is favorable for environmental protection and human health.

Description

technical field [0001] The invention relates to a method for simultaneously measuring harmful elements in iron ore, which belongs to the field of quantitative analysis in analytical chemistry. Background technique [0002] Sodium, potassium, lead, and zinc are all harmful elements in blast furnace smelting. This harmful effect is mainly manifested in the fact that after their oxides are reduced to corresponding elements in the blast furnace, due to their low boiling point, they will become The steam volatilizes and rises with the gas, a small part escapes out of the furnace with the gas, and the rest condenses in the lower temperature area of ​​the upper part of the blast furnace and is oxidized to the corresponding oxide Na 2 O, K 2 O, PbO, ZnO, and some oxides are reduced to elements and volatilized again with the furnace charge or slag iron falling, and so on. As a result, their content is continuously enriched in the furnace. This kind of enrichment occurs in the furna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/44G01N27/626
Inventor 亢德华于媛君
Owner ANGANG STEEL CO LTD
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