Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining the content of harmful elements in iron ore by using X-ray fluorescent spectrometry

A technique of fluorescence spectroscopy and harmful elements, applied in measuring devices, material analysis using wave/particle radiation, instruments, etc., can solve the problem of not being able to know and master the real-time furnace conditions, composition and crystal form differences of ironmaking blast furnaces in time, Problems such as the inability to measure multiple elements at the same time achieve the effects of overcoming particle size effects and mineral effects, reducing absorption-enhancement effects, and shortening the detection cycle

Inactive Publication Date: 2014-04-23
MAGANG (GROUP) HOLDING CO LTD +1
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common defects of these two analysis methods are: multi-element cannot be measured at the same time, only a single element can be analyzed, the operation is cumbersome, the procedure of sample dissolution is complicated, and the analysis period is long
At the same time, a large amount of chemical reagents are used, causing certain pollution to the environment
Therefore, it is impossible to know and grasp the real-time furnace conditions of the ironmaking blast furnace in time, and it is difficult to meet the needs of blast furnace production
At the same time, due to the wide variety of iron ores, there are often accompanying organisms such as sulfides and sulfates to form complex mineral structures, and the origin of iron ores is different, and the composition and crystal morphology are different, resulting in the presence of particle size effects and Mineral effects, leading to large analytical biases in traditional chemical analysis or atomic absorption spectrometry analysis

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining the content of harmful elements in iron ore by using X-ray fluorescent spectrometry
  • Method for determining the content of harmful elements in iron ore by using X-ray fluorescent spectrometry
  • Method for determining the content of harmful elements in iron ore by using X-ray fluorescent spectrometry

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] (2) Preparation of samples and calibration samples:

[0019] Use anhydrous lithium tetraborate as the flux, sodium nitrate as the oxidant, and ammonium bromide as the release agent. The dilution ratio of the sample and the flux is 1:16; accurately weigh the sample and the flux in a weighing dish, and add a certain amount After fully mixing, transfer the oxidant into a platinum-yellow crucible, and add a certain amount of release agent; put it into a melting machine, and melt it at 1150°C for 15 minutes to make a glass sample. After demoulding and cooling, put it in a desiccator for testing.

[0020] (3) Calibration curve creation:

[0021] Use the series of calibration samples prepared in Table 1 to prepare glass samples according to step (2), and carry out the condition test on the X-ray fluorescence spectrometer, select the appropriate crystal, collimator, voltage and current, 2θ and pulse height distribution, etc., to obtain Choose the best analytical conditions fo...

Embodiment 1

[0024] Embodiment 1, a method for determining the content of harmful elements As, Pb, Zn and Cu in iron ore by X-ray fluorescence spectrometry: the first step, the selection of calibration samples:

[0025] Select 7 iron ore standard samples, add reference substances with the iron ore standard samples, prepare 5 synthetic standard samples with a certain gradient according to a certain proportion, and form a series of calibration samples. The series of calibration samples are shown in Table 1 below, and the content distribution of each element is shown in Table 2 below.

[0026] Table 1 Calibration sample series

[0027] serial number

serial number

sample name

1

GSBD31004-93

iron ore

2

GSBH30002-97

iron ore

3

GSBH30003-97

iron ore

4

GSBH30005-97

iron ore

5

GSBH30006-97

iron ore

6

YSBC14721-98

magnetite

7

YSBC14722-98

magnetite

8

HC-1

Synthet...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for determining the content of harmful elements in iron ore by using X-ray fluorescent spectrometry. The method comprises the following steps: firstly, selecting an iron ore standard sample and a standard substance to prepare a series of standard samples, and then transferring the standard samples, an oxidant and a release agent to a platinum yellow crucible after mixing; preparing a glass sheet after melting at high temperature, so as to obtain a calibration sample; measuring the strength of As, Pb, Zn and Cu elements in the calibration sample by using an X-ray fluorescence spectrophotometer, and making a calibration curve; putting a test sample fabricated by the same fabrication method as the calibration sample into the X-ray fluorescence spectrophotometer; and making a calibration curve of an X-ray fluorescent spectrometry by using the calibration sample for measuring, so as to obtain the content of As, Pb, Zn and Cu elements in the sample. Thus, the content of main elements of SiO2, CaO, MgO, Al2O3, TiO2, P and the like is measured when the content of As, Pb, Zn and Cu in the iron ore is measured.

Description

technical field [0001] The invention relates to a chemical analysis method in the metallurgical industry, in particular to a method for quickly and accurately measuring the content of harmful elements in iron ore by using X-ray fluorescence spectrometry. Specifically, the harmful elements refer to As, Pb, Zn and Cu. Background technique [0002] Iron ore is an important raw material for iron and steel production enterprises, mainly used for smelting pig iron in blast furnaces. At present, magnetite (Fe 3 o 4 ), hematite (Fe 2 o 3 ) Limonite (2Fe 2 o 3 ·3H 2 O) and siderite (FeCO 3 )Wait. [0003] Harmful impurity elements such as As, Pb, Zn, and Cu in iron ore not only directly affect the smelting effect of the blast furnace and shorten the life of the blast furnace, but also affect the subsequent rolling and welding performance of the steel, thereby affecting the quality of the steel. Therefore, when iron ore is smelted, the amount of As, Pb, Zn and Cu in the furna...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N23/223
Inventor 宋祖峰阚斌陆尹徐洁
Owner MAGANG (GROUP) HOLDING CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com