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Method for detecting phosphorus content in metallurgy raw materials

A technology of phosphorus content and raw materials, which is applied in the direction of analyzing materials through chemical reactions and material analysis through observing the influence of chemical indicators, can solve the problems of cumbersome and time-consuming methods and low accuracy, and achieve thorough reduction The reduction speed is fast and the effect of reducing the experiment time

Inactive Publication Date: 2014-12-24
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of low accuracy and cumbersome and time-consuming testing method of phosphorus content in existing metallurgical raw materials, and provide a simple, convenient, fast and accurate method for measuring phosphorus content in metallurgical raw materials

Method used

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  • Method for detecting phosphorus content in metallurgy raw materials
  • Method for detecting phosphorus content in metallurgy raw materials
  • Method for detecting phosphorus content in metallurgy raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) The magnetite concentrate standard sample GBW07221 produced by Wuhan Iron and Steel Research Institute was used as the sample.

[0055] 2) Weigh 0.5000g of magnetite concentrate standard sample, put it in a 300mL polytetrafluoroethylene beaker, moisten it with a small amount of water, add 20mL of concentrated hydrochloric acid, cover with a watch glass, heat at low temperature for 30min, then add 5mL of concentrated hydrofluoric acid , 5mL of concentrated nitric acid, continue to heat for 30min, add 5mL of concentrated perchloric acid, heat at low temperature until perchloric acid fumes, continue to heat and fumes to form wet salt. Cool, add 10mL of hydrochloric acid with a concentration of 10% by volume, rinse the wall of the cup with a small amount of water, heat on the electric hob to dissolve the salt, remove the beaker from the electric hob, cool to room temperature, and dilute the test solution to 100mL. The test solution was dry-filtered with medium-speed filt...

Embodiment 2

[0060] 1) The sinter standard sample GBW07219a produced by Wuhan Iron and Steel Research Institute was used as the sample.

[0061] 2) Weigh 0.2000g of sinter standard sample GBW07219a, place it in a 300mL polytetrafluoroethylene beaker, moisten it with a small amount of water, add 25mL concentrated hydrochloric acid, cover it with a watch glass, heat at low temperature for 30min, then add 5mL concentrated hydrofluoric acid , 5mL of concentrated nitric acid, continue to heat for 30min, add 5mL of concentrated perchloric acid, heat at low temperature until perchloric acid fumes, continue to heat and fumes to form wet salt. Cool, add 10mL of hydrochloric acid with a concentration of 10% by volume, rinse the cup wall with a small amount of water, heat on an electric hob to dissolve salts, remove the beaker from the electric hob, cool to room temperature, and dilute the test solution to 100mL. The test solution was dry-filtered with medium-speed filter paper.

[0062] 3) Dispense...

Embodiment 3

[0066] 1) The dolomite standard sample 0247 produced by Wuhan Iron and Steel Research Institute was used as the sample.

[0067] 2) Weigh 1.0000g of dolomite standard sample 0247, put it in a 300mL polytetrafluoroethylene beaker, moisten it with a small amount of water, add 20mL of concentrated hydrochloric acid, cover with a watch glass, heat at low temperature for 30min, then add 5mL of concentrated hydrofluoric acid , 5mL of concentrated nitric acid, continue to heat for 30min, add 5mL of concentrated perchloric acid, heat at low temperature until perchloric acid fumes, continue to heat and fumes to form wet salt. Cool, add 10mL of hydrochloric acid with a concentration of 10% by volume, rinse the cup wall with a small amount of water, heat on an electric hob to dissolve salts, remove the beaker from the electric hob, cool to room temperature, and dilute the test solution to 100mL. The test solution was dry-filtered with medium-speed filter paper.

[0068] 3) Dispense 20.0...

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Abstract

The invention discloses a method for detecting phosphorus content in metallurgy raw materials. According to the method, bismuth nitrate, ascorbic acid and hydroxylamine hydrochloride are prepared into a mixed reducing agent through uniform sample weighing amounts; and ammonium molybdate, potassium sodium tartrate and ethanol are prepared into a mixed developing solution, and bismuth phosphorus molybdenum blue ternary heteropoly acid is generated. A phenomenon that the reducibility of ascorbic acid is strong so that other ion inferences are caused is avoided and the stability of the reducing agent is enhanced; the mixed reducing agent and the mixed developing solution can be added reversely; and the content can be determined by one calibration curve through quantitative dilution of a high-content analyzing section. By virtue of the method, the content of the phosphorus in the metallurgy raw materials can be accurately determined; and according to the method, the steps are simple in steps, the operation is convenient, and the analysis requirements on phosphorus in a production process can be met.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for measuring phosphorus content in metallurgical raw materials. Background technique [0002] Metallurgical raw materials are the source materials in the iron and steel metallurgy process. In the process of iron and steel metallurgy, phosphorus is generally considered a harmful element. High phosphorus in steel is prone to cold and brittleness, which affects its plasticity, toughness and impact resistance. Therefore, it is very necessary to determine the phosphorus content in metallurgical raw materials. [0003] At present, the methods for determining phosphorus content in metallurgical raw materials such as metallurgical lime and iron ore mainly include magnesium ammonium phosphate gravimetric method, ammonium phosphomolybdate precipitation acid-base titration method, bismuth phosphomolybdenum blue photometric method and ICP-AES method. The above-me...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 周郑闻向东陈士华张穗忠吴立新邵梅谭谦赵希文文斌
Owner WUHAN IRON & STEEL (GROUP) CORP
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