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A method for measuring copper content in nickel-copper alloy

A nickel-copper alloy and copper content technology, applied in the field of metallurgy, can solve problems such as inaccurate copper content detection results, and achieve the effects of avoiding the adverse effects of steelmaking and rolling processes, simple operation, and good precision

Active Publication Date: 2021-12-10
LIUZHOU IRON & STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a method for measuring the copper content in the nickel-copper alloy, so as to solve the problem of inaccurate detection results of the copper content in the nickel-copper alloy during the steelmaking process

Method used

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  • A method for measuring copper content in nickel-copper alloy
  • A method for measuring copper content in nickel-copper alloy
  • A method for measuring copper content in nickel-copper alloy

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Embodiment

[0061] Embodiment: The method for measuring the copper content in the nickel-copper alloy adopts the following specific steps.

[0062] Use dilute nitric acid to dissolve the sample, ammonia water to separate the iron interfering elements, adjust the pH=5.5 in the filtrate, add excess ethylenediaminetetraacetic acid EDTA solution to complex all the elements that can be complexed, and then add thiourea, 1.10-di The combined masking agent composed of nitrogen phenanthrene (o-phenanthroline) and ascorbic acid selectively decomposes the Cu-EDTA complex, and finally titrates the released EDTA with zinc standard solution, and the copper content can be obtained by calculation.

[0063] (1) Sample dissolution: Weigh 0.5004g of nickel-copper alloy sample into a 200mL beaker, add 20mL (1+2, 1 part of concentrated nitric acid + 2 parts of water) nitric acid, heat until completely dissolved, remove and cool, and constant volume In a 250mL volumetric flask, the sample solution was obtained...

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Abstract

The embodiment of the present invention provides a method for measuring the copper content in the nickel-copper alloy. The method for measuring the copper content in the nickel-copper alloy includes the following steps: sample dissolution, interference separation, determination of copper content, correction of precipitation adsorption, and adjustment of copper content. Calculation; The interference separation is to separate the iron interference element with ammonia; The measurement of the copper content is to adopt the selective decomposition of the combined masking agent composed of thiourea, phenanthroline and ascorbic acid Cu-EDTA complex , and finally titrate the released ethylenediaminetetraacetic acid EDTA with zinc standard solution, thereby calculate the content of copper; the correction of the precipitation adsorption is to dissolve the precipitation with dilute hydrochloric acid to dissolve the copper into the test solution, and measure the copper content by using ICP spectrometry. The copper content in the solution was corrected. The method provided by the invention for measuring the copper content in the nickel-copper alloy can solve the problem of inaccurate detection results of the current copper content in the nickel-copper alloy, and control the relative standard deviation RSD within 0.5%.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a method for measuring copper content in nickel-copper alloys, in particular to a method for separating iron-thiourea from ammonia water and releasing complexation capacity. Background technique [0002] Nickel and copper are the main alloying elements in steelmaking, and are widely used as alloying agents for weathering steel, structural steel, stainless steel and other steel types. At present, pure metals are used for steelmaking nickel and copper alloyed nickel and copper, so the price is expensive, which increases the cost of steelmaking. Nickel-copper alloy is a new alloy made by secondary melting of nickel, copper and iron. The alloy contains about 20% nickel, about 50% copper, and about 30% iron. It can be used for alloying steelmaking. Due to the interference of a large amount of iron elements in the sample, ferric iron and copper react to redissolve the copper generate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16G01N21/73G01N21/78
CPCG01N31/16G01N21/73G01N21/78
Inventor 欧军陈海雷坚黄义伟胡麟刘祖强熊小庆
Owner LIUZHOU IRON & STEEL
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