Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for determining calcium content of iron-calcium cored wire

A determination method and technology of calcium content, applied in chemical method analysis, chemical analysis by titration method, measuring device, etc., can solve the problems of short operation process, no chemical method for calcium particle purity content, low cost, etc., and achieve simple equipment , Reduce reagent consumption and labor costs, and reduce losses

Inactive Publication Date: 2016-06-08
INNER MONGOLIA BAOTOU STEEL UNION
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a short operation process, low cost, fast, efficient, accurate, good stability, and easy-to-master method for determining the calcium content in iron-calcium wires, so as to solve the problem of measuring calcium in iron-calcium wires. Grain purity content without chemical method problems

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 calcium content of iron-calcium cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

[0019] 1. Method summary:

[0020] Add 100mL of secondary water into a 400mL beaker, dissolve the sample with hydrochloric acid (65%), remove it, after cooling, add 50mL of triethanolamine (12%) (must be the first to add, in order to firstly dissolve iron and aluminum, etc. Interfering element masking), add 50mL water, add a little hydroxylamine hydrochloride, (further masking effect), add 30mL potassium hydroxide solution (20%), (buffer solution effect), add a few drops of magnesium sulfate (0.5%) (make the end point Good looking), an appropriate amount of calcein, and titrate with EDTA standard solution until the fluorescent green disappears as the end point.

[0021] 2. Reagents:

[0022] 2.1 hydrochloric acid (65%)

[0023] 2.2 Hydroxylamine hydrochloride (solid)

[0024] 2.3 Triethanolamine (12%) ...

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 discloses a method for determining calcium content of an iron-calcium cored wire and aims to provide a method which has the advantages of short operation procedure, low cost, rapidness, high efficiency, accuracy, good stability and easiness in mastering and is used for determining the calcium content of the iron-calcium cored wire. According to the method, secondary water is added to a beaker, a sample is dissolved on a low-temperature electric hot plate through hydrochloric acid, the dissolved sample is taken down and cooled, then triethanolamine, water and a small amount of hydroxylamine hydrochloride are added, a potassium hydroxide solution is added, a few magnesium sulfate drops are added, an appropriate amount of calcein is added, and an EDTA (ethylenediaminetetraacetic acid) standard solution is used for titration until fluorescence green disappearance as an end point.

Description

technical field [0001] The invention relates to the technical field of metal analysis, in particular to a method for determining calcium content in iron-calcium wires. Background technique [0002] The process of feeding calcium wire into molten steel is called calcium treatment, and its main purpose is to make the finely dispersed deoxidation product Al in molten steel 2 o 3 The inclusions are transformed into 12CaO·7Al with a low melting point as much as possible 2 o 3 , collide with each other to form large particles of liquid inclusions, float up to remove them, improve the purity of molten steel, improve the pourability of continuous casting molten steel, relieve nozzle blockage, and increase the number of continuous casting furnaces. And for Al in steel 2 o 3 The inclusions are spheroidized to improve the ductility of the rolled steel and the isotropic uniformity of the mechanical properties. At present, the routinely used calcium metal cored wire (hereinafter re...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/79
CPCG01N31/162G01N21/79
Inventor 李虹刘建华周春玲
Owner INNER MONGOLIA BAOTOU STEEL UNION