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Determination method of copper, tin and bismuth content in lead smelting solid waste with high silver content

A determination method and lead smelting technology, applied in the determination of tin and bismuth content, copper field, can solve the problems of complex composition, turbid solution, inability to completely eliminate the phenomenon of sample hydrolysis, etc., to eliminate the interference of non-target elements, and the analysis results are accurate , The effect of simple sample handling

Active Publication Date: 2021-10-01
北矿检测技术股份有限公司
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  • Claims
  • Application Information

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Problems solved by technology

However, in the actual treatment of lead smelting solid waste containing some gold and silver materials, hydrochloric acid-tartaric acid-hydrogen peroxide treatment of samples still cannot completely eliminate the hydrolysis of some samples
The main reason is that the composition of lead smelting solid waste samples is complex. Such materials usually contain Au, Ag, Se, Te, As, Sb, Bi, Sn, and exist in various phases. After pretreatment, transition metals that are difficult to oxidize are formed. Hydroxide tends to make the solution cloudy

Method used

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  • Determination method of copper, tin and bismuth content in lead smelting solid waste with high silver content
  • Determination method of copper, tin and bismuth content in lead smelting solid waste with high silver content
  • Determination method of copper, tin and bismuth content in lead smelting solid waste with high silver content

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preparation example Construction

[0058] The preparation method of the sample blank solution is as follows: carrying out alkali melting treatment without adding the lead smelting solid waste, and then using the mixed solution for leaching to obtain the sample blank solution.

[0059] In an optional embodiment, during the determination, the working conditions of the inductively coupled plasma emission spectrometer are specifically:

[0060] RF power 1000W -1200W, plasma air flow 15.0L / min, auxiliary air flow 1.50 L / min, atomizing air flow 0.60L / min -0.70L / min, observation height 4mm -8mm.

[0061] Optionally, the RF power can be any value between 1000W, 1100W, 1200W and 1000W-1200W; the atomizing gas flow rate can be 0.60L / min, 0.65L / min, 0.70L / min and 0.60L / min- Any value between 0.70L / min; observation height can be any value between 4mm, 5mm, 6mm, 7mm, 8mm and 4mm-8mm.

[0062] In an optional embodiment, during the determination, the wavelengths of the analyzed elements are: 327.395 nm for copper, 189.925 nm...

Embodiment 1-5

[0068] Take 5 samples (silver content between 0.5% and 20%), and measure them according to the following method (the flow chart is as follows: figure 1 shown):

[0069] (1) Decomposition of the sample: Accurately weigh 0.2000g of the sample and mix it in a 25mL corundum crucible with about 1g of sodium peroxide at the bottom, then cover with about 1g of sodium peroxide, and place it in a muffle furnace heated to 700°C Keep the temperature and melt for 20 minutes, take out the crucible, let it cool slightly, put the crucible into a 250mL beaker filled with 5mL tartaric acid (200g / L) and 25mL inverse aqua regia, and wait until the violent action stops the melt falling off, then use Wash out the crucible with hot 2% hydrochloric acid, transfer it to a 100mL volumetric flask after cooling, and dilute to the mark with water. Prepare the sample blank solution according to the above method (without adding the sample, directly melt it with sodium peroxide and then leaching it). Take...

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Abstract

This application provides a method for determining the content of copper, tin and bismuth in lead smelting solid waste with high silver content. The method for determining the content of copper, tin and bismuth in lead smelting solid waste with high silver content comprises: performing alkali fusion treatment on the lead smelting solid waste to obtain an alkali melt, and using a mixed solution to leaching the alkali melt to obtain to the test solution; use the ICP-AES method to measure the test solution, and calculate the content of copper, tin and bismuth in the lead smelting solid waste by the standard solution working curve; the mixed solution includes tartaric acid and inverse king A mixture of water, the mass content of silver in the lead smelting solid waste is 0.5%-20%. The determination method provided in this application can realize the simultaneous detection of copper, tin and bismuth content, and has the advantages of short time consumption, high efficiency, high detection accuracy, wide range, and high standard addition recovery rate.

Description

technical field [0001] The present application relates to the field of metal detection, in particular to a method for determining the content of copper, tin and bismuth in lead smelting solid waste with high silver content. Background technique [0002] Hazardous wastes produced in the lead smelting process mainly include alkali slag, anode slime and soot. It is of great practical significance to study and analyze methods for the determination of copper, tin and bismuth in such samples. [0003] At present, the commonly used analysis methods for such samples include wet analysis, photometry, volumetric method, and X-ray fluorescence spectrometry. These methods usually have a long analysis cycle and cumbersome operations, which cannot meet the current needs of rapid analysis. [0004] Because the complexity of this type of sample brings difficulties to the pretreatment of the sample, there is a method of treating the sample with hydrochloric acid-tartaric acid-hydrogen peroxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73G01N1/34
CPCG01N1/34G01N21/73
Inventor 韩晓刘春峰李华昌苏春风罗海霞汤淑芳
Owner 北矿检测技术股份有限公司
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