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Determining method for content of calcium in high-calcium line

A determination method and technology for calcium content, which are applied in the preparation of test samples, material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problems of low cost, short operation process, The purity and content of calcium particles have no problems such as chemical methods, which can reduce losses, simplify equipment, reduce reagent consumption and labor costs.

Inactive Publication Date: 2016-07-13
INNER MONGOLIA BAOTOU STEEL UNION
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  • Abstract
  • Description
  • Claims
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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 measuring calcium content in high-calcium threads, so as to solve the problem of measuring calcium in high-calcium threads. Grain purity content without chemical method problems

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  • Determining method for content of calcium in high-calcium line
  • Determining method for content of calcium in high-calcium line

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Embodiment Construction

[0015] 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.

[0016] 1. Method summary:

[0017] 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.

[0018] 2. Reagents:

[0019] 2.1 hydrochloric acid (65%)

[0020] 2.2 Hydroxylamine hydrochloride (solid)

[0021] 2.3 Triethanolamine (12%) ...

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Abstract

The invention discloses a determining method for the content of calcium in a high-calcium line, which has the advantages of short operation flow, low cost, high speed, high efficiency, accuracy and high stability, is easy to grasp and aims to solve the problem of no chemical method for determining the purity and content of calcium granules in a high-calcium line. The determining method comprises the following steps: adding 100mL secondary water into two beakers; leaving one beaker blank and adding a sample into the other beaker; respectively adding secondary water and 65% hydrochloric acid for dissolving the sample; taking down, cooling, and then adding 50mL triethanolamine (12%); adding 50mL water, adding less hydroxylamine hydrochloride; adding 30mL potassium hydroxide solution (20%); adding few drops of magnesium sulfate (0.5%) and appropriate quantity of calcein; and titrating with an EDTA standard solution till fluorescent green disappears.

Description

technical field [0001] The invention relates to the field of metal analysis, in particular to a method for determining calcium content in high-calcium wire. Background technique [0002] Calcium treatment is a process of feeding calcium wire into molten steel for treatment, and its main purpose is to treat MnS inclusions and Al in steel 2 o 3 Inclusions are denatured. On the one hand, calcium treatment can make inclusions with large particles and high melting point Al 2 o 3 Denature into low-melting calcium-aluminate inclusions with high calcium content, promote the floating of inclusions, purify molten steel, ensure pourability of molten steel, and improve steel quality; on the other hand, MnS can be partially or completely modified into CaS , that is to form a fine, single CaS phase or a composite phase of CaS and MnS, reduce the number of sulfide inclusions, change its composition and properties, and purify molten steel. At present, most domestic steel companies use i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/28G01N1/44
CPCG01N21/78G01N1/28G01N1/44
Inventor 李虹刘建华周春玲
Owner INNER MONGOLIA BAOTOU STEEL UNION