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Method for measuring high content lead in iron-containing dust and mud

A determination method and high-content technology, applied in the field of analytical chemistry, can solve problems such as lead-free analysis methods, and achieve the effects of simple operation, high precision, and short measurement time

Inactive Publication Date: 2013-02-06
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there is no analytical method for the determination of high levels of lead in iron-bearing dust

Method used

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  • Method for measuring high content lead in iron-containing dust and mud
  • Method for measuring high content lead in iron-containing dust and mud
  • Method for measuring high content lead in iron-containing dust and mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Will 1 # The iron-containing dust is crushed and ground to make it into a sample with a particle size of 120 mesh.

[0047] Weigh 0.1000g1 # Put the sample in a 250mL polytetrafluoroethylene beaker, wet it with water, make it dispersed, add 13mL hydrochloric acid (ρ 1.19g / mL), add 7mL nitric acid (ρ 1.42g / mL), 10mL hydrofluoric acid (ρ 1.13g / mL) ), dissolve at low temperature, after the sample dissolves, add 3mL of perchloric acid (ρ 1.68g / mL) and continue heating until perchloric acid fumes are emitted, until the remaining solution volume is nearly dry, cool slightly, add 5mL of water, add ρ 1.42g / mL 5mL of nitric acid, dissolved salts, transferred to a 250mL volumetric flask, diluted with water to the mark, shaken up, along with a reagent blank, measured by an inductively coupled plasma atomic emission spectrometer; the measurement results are shown in Table 4.

[0048] Drawing of working curve

[0049]Weigh 0.05g of high-purity iron in seven 250mL beakers, add 10m...

Embodiment 2

[0058] Will 2 # The iron-containing dust is crushed and ground to make it into a sample with a particle size of 120 mesh.

[0059] Weigh 0.1000g2 # Put the sample in a 250mL polytetrafluoroethylene beaker, wet it with water, make it dispersed, add 10mL hydrochloric acid (ρ 1.19g / mL), add 7mL nitric acid (ρ 1.42g / mL), 10mL hydrofluoric acid (ρ 1.13g / mL) ), dissolve at low temperature, after the sample dissolves, add 2mL of perchloric acid (ρ 1.68g / mL) and continue to heat until the fumes of perchloric acid are emitted until the remaining solution volume is about 1mL, cool slightly, add 5mL of water, add ρ 1.42g / mL 5mL of nitric acid, dissolve salts, transfer in the 250mL volumetric flask, dilute to scale with water, shake up, along with reagent blank, adopt inductively coupled plasma atomic emission spectrometer to measure; Calculate according to embodiment 1 calculation formula and measuring method , the results are shown in Table 4.

[0060] Drawing of working curve

[00...

Embodiment 3

[0063] Will 3 # The iron-containing dust is crushed and ground to make it into a sample with a particle size of 120 mesh.

[0064] Weigh 0.1000g3 # Put the sample in a 250mL polytetrafluoroethylene beaker, wet it with water, make it dispersed, add 10mL hydrochloric acid (ρ 1.19g / mL), add 10mL nitric acid (ρ 1.42g / mL), 10mL hydrofluoric acid (ρ 1.13g / mL) ), dissolve at low temperature, after the sample dissolves, add 2mL of perchloric acid (ρ 1.68g / mL) and continue to heat until perchloric acid fumes are emitted until the remaining solution volume is nearly dry, then cool slightly, add 5mL of water, and add ρ 1.42g / mL 5mL of nitric acid, dissolve salts, transfer in the 250mL volumetric flask, dilute to scale with water, shake up, along with reagent blank, adopt inductively coupled plasma atomic emission spectrometer to measure; Calculate according to embodiment 1 calculation formula and measuring method , the results are shown in Table 4.

[0065] Drawing of working curve

...

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Abstract

The invention relates to a method for measuring high content lead in iron-containing dust and mud and belongs to the technical field of analytical chemistry. The method comprises the following steps of: heating and decomposing a sample in a polytetrafluoroethylene beaker at a low temperature by using hydrochloric acid, nitric acid and hydrofluoric acid until perchloric acid is fuming; slightly cooling, adding dilute nitric acid dissolving salt, supplementing hydrochloric acid when insoluble substances are present, fixing the volume to a specified volume, and measuring the lead content by employing an inductive coupling plasma atomic emission spectrometer under the optimized instrument conditions. The method has the advantages of short measurement time, easy and convenient operation and high precision and accuracy and is particularly suitable for routine analysis of lots of samples.

Description

1. Technical field [0001] The invention belongs to the technical field of analytical chemistry and relates to a method for determining high-content lead in iron-containing dust. 2. Background technology [0002] With the extensive use of iron-containing dust and sludge in sintering and blast furnace ironmaking, the behavior of its harmful component lead in the pellet production process, sintering process and blast furnace ironmaking process has attracted the attention of smelting experts. Therefore, its harmful The exact content of lead has become the focus of the smelting process. Currently, there is no analytical method for the determination of high levels of lead in iron-bearing dust. 3. Contents of the invention [0003] The purpose of the present invention is to disclose a method for determining high-content lead in iron-containing dust and mud, and the method can accurately measure the content of lead in iron-containing dust and mud. [0004] First, through experim...

Claims

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Application Information

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IPC IPC(8): G01N21/71
Inventor 丁美英
Owner INNER MONGOLIA BAOTOU STEEL UNION
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