Method for measuring content of calcium oxide and magnesium oxide in refined slag

A determination method, calcium oxide technology, applied in chemical method analysis, material analysis by observing the influence of chemical indicators, measuring devices, etc., can solve the problems of high cost and long time consumption, and achieve loss reduction, simple equipment, The effect of reducing reagent consumption and labor costs

Inactive Publication Date: 2016-06-08
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

[0007] In order to solve the problems of long time consumption and high cost in the determination of calcium oxide and magnesium oxide in refining slag in the existin

Method used

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Embodiment Construction

[0029] 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.

[0030] 1. Method summary:

[0031] Use hydrochloric acid (65%), nitric acid (67%)-hydrofluoric acid (40%) to dissolve the sample in a polyethylene plastic beaker, add perchloric acid to smoke, (perchloric acid smoke must be exhausted, otherwise, it will affect Determination of calcium and magnesium,) removed, after cooling, carefully add 5mL of hydrochloric acid (65%) along the wall of the cup, heating to dissolve the salts. Transfer the solution to a 250mL volumetric flask with secondary water, dilute to the mark and shake well.

[0032] Take two parts of 50mL solution in two 250mL beakers, add 50mL triethanolamine (12%) to one part (must be added first, in order to firstly cover interfering elements such as iron and aluminum), add 50mL water, add A little hydroxylamine hydrochloride, (further masking e...

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Abstract

The invention discloses a method for measuring the content of calcium oxide and magnesium oxide in refined slag and aims to provide a method which can be used for measuring the content of calcium oxide and magnesium oxide in the refined slag quickly, accurately and efficiently. A sample is dissolved with hydrochloric acid and nitric acid-hydrofluoric acid, perchloric acid is added, the mixture smokes and is taken off and cooled, hydrochloric acid is added along the wall of a beaker carefully, and salt is heated and dissolved; a solution is transferred to a large volumetric flask with secondary water, diluted until the solution reaches a predetermined scale and shaken uniformly, and two parts of the solution are taken out and put into two small beakers; triethanolamine, water and a little hydroxylammonium chloride are added to one part of the solution, a potassium hydroxide solution is added until the pH value of the mixture is 12, a proper amount of calcein is added, an EDTA (ethylene diamine tetraacetic acid) standard solution is dropwise added until fluorescent green disappears, and accordingly, the content of calcium is obtained; triethanolamine, water and hydroxylamine hydrochloride are added, an ammonium-ammonium chloride solution is added until the pH value of the mixture is 10, eriochrome black T is taken as an indicator, an EDTA standard solution is dropwise added until the mixture is in pure blue, and the content of calcium and the content of magnesium can be obtained.

Description

technical field [0001] The invention relates to the technical field of slag analysis, in particular to a method for determining the contents of calcium oxide and magnesium oxide in refining slag. Background technique [0002] At present, the steelmaking methods used in my country are mainly converter, open hearth furnace and electric furnace steelmaking. According to the steelmaking method, steel slag can be divided into converter steel slag, open hearth furnace steel slag and electric furnace steel slag; according to different production stages, steel slag can be divided into steelmaking slag, casting slag and splash slag. In steelmaking slag, open hearth furnace slag can be divided into initial slag and final slag (including refining slag and tapping slag), electric furnace steel slag is divided into oxidation slag and reducing slag; according to the nature of molten slag, it can be divided into basic slag and Acid slag. Different raw materials, different steelmaking met...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/79
CPCG01N31/162G01N21/79
Inventor 李虹刘建华周春玲周欣
Owner INNER MONGOLIA BAOTOU STEEL UNION
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