A method for measuring iron-calcium ratio in iron-calcium cored wire

A determination method and cored wire technology can solve the problems of large consumption of chemicals, cumbersome operation steps, large measurement errors, etc., and achieve the effects of reasonable principle, shortened analysis steps, and easy operation.

Inactive Publication Date: 2015-09-30
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

The traditional analysis method has cumbersome operation steps and consumes a large amount of chemicals, resulting in a large final measurement error. At the same time, it is not environmentally friendly and energy-saving.

Method used

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  • A method for measuring iron-calcium ratio in iron-calcium cored wire
  • A method for measuring iron-calcium ratio in iron-calcium cored wire
  • A method for measuring iron-calcium ratio in iron-calcium cored wire

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Embodiment Construction

[0038] In the present invention, the reagents used are preferably: potassium hydroxide aqueous solution concentration is 200g / L; magnesium sulfate aqueous solution concentration is 5g / L.

[0039] The determination steps of iron-calcium ratio in iron-calcium cored wire are as follows:

[0040] Step 1: configure the standard solution, and calculate the concentration C of the EDTA standard solution;

[0041] Preparation of calcium standard solution: Weigh 15.0000g of calcium carbonate that was previously dried at 105-110°C for 1 hour and cooled to room temperature, add an appropriate amount of cold boiled water and dropwise add hydrochloric acid aqueous solution with a volume ratio of 1:1 to dissolve completely, then Dilute it with cold boiled water into a 1000mL volumetric flask to prepare a calcium standard solution with a concentration of 0.1500mol / L.

[0042] Preparation of indicator: Grind and mix 1g of calcium indicator with 100g of dried sodium chloride, and put it in a g...

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Abstract

The invention discloses a method for measuring iron / calcium ratio in an iron-calcium core-spun yarn, which comprises the following steps: preparing standard solutions which comprise a calcium standard solution and an EDTA (ethylene diamine tetraacetic acid) standard solution, and calculating the concentration C of the EDTA standard solution; separating iron powder and calcium particles in the iron-calcium powder with a magnet, and adding water and the EDTA standard solution into the separated iron powder to prepare a sample solution; and titrating the sample solution with the calcium standard solution, and calculating the iron / calcium ratio in the iron-calcium core-spun yarn according to the concentration of the calcium standard solution and the concentration C of the EDTA standard solution. The technical scheme disclosed by the invention can be used for accurately measuring the iron / calcium ratio in the iron-calcium core-spun yarn, and is simple to operate.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical analysis, in particular to a method for measuring the iron-calcium ratio in an iron-calcium cored wire. Background technique [0002] With the continuous improvement of the steelmaking process and the development of new steel types, the application of new deoxidizers is becoming more and more widespread. Fe-calcium cored wire is one of them. At present, the process control of low-silicon steelmaking adopts iron-calcium cored wire for deoxidation. , so an accurate analysis of the iron-calcium ratio content of the iron-calcium cored wire is an important part of controlling the final product. The traditional analysis method has cumbersome operation steps and consumes a large amount of chemicals, which leads to large final measurement errors and is not environmentally friendly and energy-saving. Contents of the invention [0003] The purpose of the present invention is to provi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 刘钢耀安静刘建华王宴秋乔宇赵布和田甜战丽君李虹戴文杰
Owner INNER MONGOLIA BAOTOU STEEL UNION
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