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Metallurgical lime calcium oxide content determination method

A measurement method, calcium oxide technology, is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of long detection cycle, reduced detection cost, and cumbersome steps. Achieve the effects of shortened detection cycle, shortened measurement time and low energy consumption

Inactive Publication Date: 2015-12-09
SHANDONG XIWANG SPECIAL STEEL
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for the determination of calcium oxide content in metallurgical lime, which is simple, efficient and accurate in view of the existing detection method with cumbersome steps and long detection period, which cannot meet the needs of high-efficiency actual production. Analytical method for calcium oxide content in medium to meet fast-paced production needs and reduce testing costs

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  • Metallurgical lime calcium oxide content determination method

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Embodiment Construction

[0018] The present invention will be described in detail below by way of examples.

[0019] The assay method of calcium oxide content in described metallurgical lime, concrete steps are as follows:

[0020] (1) Weigh 0.25g sample and place it in a 100ml beaker, add 25ml of hydrochloric acid with a volume fraction of 20% for heating and dissolving, then transfer it into a 250ml volumetric flask, constant volume, and mix for subsequent use;

[0021] (2) Take 25ml from the 250ml sample solution obtained in step (1) and place it in a 300ml conical flask, add 5ml of triethanolamine with a volume fraction of 33.33%, 10ml of sodium hydroxide with a concentration of 200g / L and 0.1g Calcium indicator, titrate with EDTA standard solution from red to blue as the end point, record the volume V;

[0022] (3) According to the formula: Calculate the result, where m is the sample weight g, c is the EDTA concentration, and r is the fractionation ratio.

[0023] The calcium indicator in the...

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Abstract

The invention belongs to the technical field of element determination and relates to a metallurgical lime calcium oxide content determination method. The metallurgical lime calcium oxide content determination method comprises decomposing a sample by hydrochloric acid, transferring the decomposed sample, metering the volume, masking iron and aluminum by triethanolamine and carrying out calcium oxide titration in the presence of a calcium indicator by EDTA. The determination method realizes simple, efficient and accurate analysis of lime calcium oxide content, satisfies requirements on fast production and reduces a detection cost.

Description

technical field [0001] The invention belongs to the technical field of element determination, and in particular relates to a method for determining calcium oxide content in metallurgical lime. Background technique [0002] Calcium oxide content in lime in the national standard is determined by alkali fusion, using a sodium carbonate-boric acid mixed solvent to melt in a platinum crucible at 1000 degrees Celsius for 10 minutes, leaching with hydrochloric acid and then set to volume for later use. The melting process of the national standard method is cumbersome, and the detection period is as long as 4 to 6 hours. It is difficult to be widely used in fast-paced industrial production. The platinum crucible used as the melting tool is expensive, and it needs to be purified and trimmed after a period of use, and the detection cost is high. . Contents of the invention [0003] The purpose of the present invention is to provide a method for the determination of calcium oxide co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 王棣景振苏韩红英赵宁宁张灵通董晓
Owner SHANDONG XIWANG SPECIAL STEEL
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