Method for determining content of non-metallic elements in crude lead

A technology of non-metallic elements and determination methods, which is applied in the field of determination of non-metallic element content in crude lead, can solve the problems of easily divergent detection results, low detection accuracy of crude lead and lead slag, etc., and achieve high detection accuracy and simple principle Effect

Active Publication Date: 2020-10-09
骆驼集团蓄电池研究院有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a reliable method for detecting non-metallic elements in crude lead, which is used to characterize crude lead and lead ...

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  • Method for determining content of non-metallic elements in crude lead
  • Method for determining content of non-metallic elements in crude lead

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto.

[0020] 1. Take a total of about 200g samples from different positions of crude lead, and melt and cast them into ingots in lead molds. After cooling, use a lathe to turn out a smooth plane, detect all elements in a direct-reading spectrometer, and take the same detection operation for electrolytic lead;

[0021] 2. Use a knife to cut about 0.1g (accurate to 0.0001g) sample from the crude lead ingot, put it into a beaker, digest it with nitric acid, and steam until it is nearly dry; add sulfuric acid and continue steaming until a large amount of white smoke comes out, stop heating, and cool down; Add 30mL of distilled water to the wall of the cup, boil and cool. Then filter with filter paper, wash the precipitate with distilled water, then transfer the filte...

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Abstract

The invention relates to the technical field of lead-based alloy detection, and in particular relates to a method for determining the content of non-metallic elements in crude lead. The content of non-metallic elements in crude lead is directly related to lead-containing slag of crude lead. The invention mainly solves the problems of poor detection precision caused by extensive crude lead slag-containing determination modes and non-uniform determination standards, and easy divergence of detection results during multi-party detection. The determination method comprises two times of lead contentdetection, namely direct reading spectrometer detection and EDTA titration method detection, on electrolytic lead and crude lead, and the content of non-metallic elements is calculated by analyzing the difference value of the two times of detection, so that the lead slag content of the crude lead is represented. According to the method provided by the invention, the non-metallic element content which is difficult to directly measure is indirectly calculated through two detection methods with different principles, and the method has the advantages of simple principle and high detection precision.

Description

technical field [0001] The invention belongs to the technical field of lead-based alloy detection, and in particular relates to a method for measuring the content of non-metallic elements in crude lead. Background technique [0002] Crude lead is the lead produced after the lead-containing material is smelted in a smelting furnace. During the smelting process, incompletely reacted non-metallic elements (mainly oxygen and sulfur) in a small amount of lead-containing materials combine with crude lead to form lead oxide, lead sulfide and other substances. Due to the high temperature during the lead release process (greater than 800°C), lead oxide, lead sulfide, etc. are dissolved in the crude lead and released together with the crude lead. During the slagging process of crude lead, the temperature is low (about 400°C), and lead oxide and lead sulfide are precipitated from the crude lead and float to the surface of the lead liquid to form a paste-like slag. A slag remover need...

Claims

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Application Information

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IPC IPC(8): G01N21/25G01N31/16
CPCG01N21/25G01N31/16
Inventor 张翰天李洋孔庆波王进
Owner 骆驼集团蓄电池研究院有限公司
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