Method for detecting content of total iron in vanadium titanium powder

A detection method and technology of vanadium and titanium powder, applied in the field of analytical chemistry, can solve the problems of slow filtration in the melting process, fast production rhythm of enterprises, and complicated operation, and achieve the effect of simple operation process, short analysis period and accurate data.

Inactive Publication Date: 2019-02-15
CHENGDE JIANLONG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both of these national standard methods are alkali fusion methods. The fusion process is slow and requires operations such as filtration. The operation is cumbersome and the cycle is long, which cannot meet the needs of the fast-paced production of enterprises.

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  • Method for detecting content of total iron in vanadium titanium powder
  • Method for detecting content of total iron in vanadium titanium powder
  • Method for detecting content of total iron in vanadium titanium powder

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Experimental program
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Embodiment 1

[0052] In the present embodiment, a kind of method of detection total iron content in vanadium titanium powder is provided, and described detection method comprises the steps:

[0053] (1) taking by weighing the vanadium-titanium powder sample to be measured that is 0.2g is placed in 500mL volumetric flask, adds 25mL sulfur-phosphorus mixed acid, wherein the volume ratio of sulfuric acid, phosphoric acid and water in the sulfur-phosphorus mixed acid is 3:3:4, Heat to dissolve, evaporate and emit white smoke, and when the white smoke leaves the bottom of the container for 5-7cm, cool naturally to obtain a mixed solution;

[0054] (2) adding concentration to the mixed solution prepared by step (1) is 30mL of 38% concentrated hydrochloric acid, boils, drips concentration and is 60g / L tin protochloride solution, until obtaining light yellow solution, drips 10 drops concentration is 250g / L sodium tungstate solution is used as an indicator, and a titanium trichloride solution with a...

Embodiment 2

[0062] In the present embodiment, a kind of method of detection total iron content in vanadium titanium powder is provided, and described detection method comprises the steps:

[0063] (1) Take by weighing the vanadium-titanium powder sample that is 0.1g to be measured and place in 500mL volumetric flask, add 20mL sulfur-phosphorus mixed acid, wherein the volume ratio of sulfuric acid, phosphoric acid and water in the sulfur-phosphorus mixed acid is 3:3:4, Heat to dissolve, evaporate and emit white smoke, and when the white smoke leaves the bottom of the container for 5-7cm, cool naturally to obtain a mixed solution;

[0064] (2) adding concentration to the mixed solution prepared by step (1) is 20mL of 38% concentrated hydrochloric acid, boils, drips concentration and is 50g / L tin protochloride solution, until obtaining light yellow solution, drips 8 drops concentration is 250g / L sodium tungstate solution is used as an indicator, and a titanium trichloride solution with a con...

Embodiment 3

[0072] In the present embodiment, a kind of method of detection total iron content in vanadium titanium powder is provided, and described detection method comprises the steps:

[0073] (1) The vanadium-titanium powder sample to be measured that takes by weighing 0.5g is placed in the 500mL volumetric flask, adds 30mL sulfur-phosphorus mixed acid, wherein the volume ratio of sulfuric acid, phosphoric acid and water in the sulfur-phosphorus mixed acid is 3:3:4, Heat to dissolve, evaporate and emit white smoke, and when the white smoke leaves the bottom of the container for 5-7cm, cool naturally to obtain a mixed solution;

[0074] (2) adding concentration to the mixed solution that step (1) prepares is the concentrated hydrochloric acid 40mL of 37%, boils, and dripping concentration is 70g / L tin protochloride solution, until obtaining light yellow solution, drips 10 drops concentration is 300g / L sodium tungstate solution is used as an indicator, and a titanium trichloride soluti...

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Abstract

The invention provides a method for detecting content of total iron in vanadium titanium powder, characterized in that the detection method comprises following steps: (1) weighing a sample of the vanadium titanium powder to be detected and placing it in a container, adding sulfur and phosphorus mixed acid, and dissolving to obtain mixed solution; (2) adding concentrated hydrochloric acid to the mixed solution prepared in the step (1), boiling, dropping stannous chloride solution until pale yellow solution is obtained, using sodium tungstate solution as an indicator, dropping titanium trichloride solution until the solution turns light blue, and then dropping a drop of the titanium trichloride solution to obtain blue solution; (3) adding copper sulfate solution for catalysis to the blue solution prepared in the step (2) to obtain colorless solution; and (4) using sodium diphenylamine sulfonate solution as the indicator, dropping potassium dichromate standard solution to the colorless solution obtained in the step (3) until the solution turns light purple as an endpoint.

Description

technical field [0001] The invention belongs to the field of analytical chemistry and relates to a method for detecting total iron content in vanadium and titanium powder. Background technique [0002] Vanadium-titanium magnetite is a compound ore of multi-metal elements. It is a symbiotic magnetic iron ore mainly containing iron, vanadium and titanium. It has important utilization value; indicators, but due to the interference of vanadium and titanium, the national standard analysis method for the determination of total iron in vanadium-titanite is the alkali fusion method, but its operation is cumbersome and the analysis period is long, which cannot meet the fast-paced needs of production. [0003] Zhang Yubin, Du Chunping, etc. published "Quick Analysis of Total Iron in Vanadium-Titanite" in "Jiangxi Metallurgy", 2007,27(6):39-40, introducing the addition of ammonium fluoride after sample dissolution, and the use of ammonium fluoride Eliminate the interference of vanadiu...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 张世春夏立志朱丽萍
Owner CHENGDE JIANLONG SPECIAL STEEL
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