Method for measuring iron/calcium ratio in iron-calcium core-spun yarn

A determination method and a core-coated wire technology, applied in the field of chemical analysis, can solve the problems of difficult observation of the EDTA titration end point, many calcium particles in the reduced iron powder, complicated operation steps, etc., to achieve stable complexes, simple drugs, and separation good effect

Inactive Publication Date: 2019-04-12
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN103115920A discloses a method for measuring the iron-calcium ratio in iron-calcium cored wire, but the reduced iron powder used in this method contains more calcium particles, calcium precipitates appear during dissolution, and it is difficult to observe at the end point of EDTA titration , and excessive EDTA must be used, and follow-up steps such as filtration, washing, constant volume, liquid separation, and second titration are required, resulting in cumbersome operation steps, long time-consuming, and many influencing factors, which are difficult to observe

Method used

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  • Method for measuring iron/calcium ratio in iron-calcium core-spun yarn
  • Method for measuring iron/calcium ratio in iron-calcium core-spun yarn
  • Method for measuring iron/calcium ratio in iron-calcium core-spun yarn

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Embodiment 1

[0098] The comparison between the method of the present invention and the prior art is listed in Table 1 below.

[0099] Table 1: Comparison results between the method of the present invention and the method disclosed in patent CN103115920A

[0100]

Embodiment 2

[0102] Table 2 below lists the measurement results of the iron-calcium ratio in the iron-calcium cored wire using the method of the present invention and the method disclosed in the prior art.

[0103] Table 2: The method of the present invention and the disclosed method of patent CN103115920A are to the measurement result of iron-calcium ratio in iron-calcium cored wire

[0104]

[0105]

[0106] It can be seen from the above table 2 that the data obtained by using this method to measure Fe: Ca in the iron-calcium cored wire sample are accurate and reliable.

[0107] From the comparative results of the above example 1 and example 2, it can be known that the method of the present invention can accurately measure the content of Fe:Ca in the iron-calcium cored wire sample. In addition, the method is simple, fast, and easy to master, requires simple equipment and medicines, low measurement cost, low pollution, and high detection efficiency, which can meet the needs of rapid...

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Abstract

The invention discloses a method for measuring the iron / calcium ratio in an iron-calcium core-spun yarn. According to the method measuring the iron / calcium ratio in the iron-calcium core-spun yarn, the measurement process is simpler, rapid and accurate. The separation effect of iron powder and calcium during the measurement process is good. A complex formed by titrating residual calcium in the iron powder with an EDTA (Ethylene Diamine Tetraacetic Acid) standard solution is stable, the endpoint is easy to observe, and the result is stable and accurate.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to a method for rapidly measuring the iron-calcium ratio in iron-calcium cored wire. Background technique [0002] At present, with the continuous improvement of the steelmaking process and the development of new steel types, there are more and more types of deoxidizers, and Fe-Ca cored wire is one of them. Many steel companies use Fe-Ca cored wire for process control of low-silicon steel. The core wire is deoxidized, so accurate analysis of the content of each component of the iron-calcium cored wire is an important link in controlling the quality of the final product. [0003] Patent CN103115920A discloses a method for measuring the iron-calcium ratio in iron-calcium cored wire, but the reduced iron powder used in this method contains more calcium particles, calcium precipitates appear during dissolution, and it is difficult to observe at the end point of EDT...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/78
CPCG01N21/78G01N31/16
Inventor 战丽君刘钢耀陈英周欣薛玉兰王宴秋
Owner BAOTOU IRON & STEEL GRP
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