Method for measuring arsenic in gas and dust discharged by roasting and burning furnace

A determination method and incinerator technology, which are applied in the preparation of test samples and the measurement of color/spectral properties, etc., can solve problems such as analysis effects, and achieve the effects of simple operation, good popularization and application value, and strong anti-interference.

Inactive Publication Date: 2009-12-30
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

This method requires prefabricated specim

Method used

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  • Method for measuring arsenic in gas and dust discharged by roasting and burning furnace
  • Method for measuring arsenic in gas and dust discharged by roasting and burning furnace
  • Method for measuring arsenic in gas and dust discharged by roasting and burning furnace

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[0019] First, a corundum filter cartridge with a specification of 28mm*100mm (outer diameter * length) and a wall thickness of 1.5mm is used to predigest it with mixed acid. Place the corundum filter cartridge in a beaker, add 7ml (1+1) sulfuric acid, 20ml nitric acid, and 4ml perchloric acid, and heat it on an electric plate. After the violent reaction stops, heat it until thick white smoke of perchloric acid is emitted. Take it down and let it cool, rinse the wall of the bottle with water, and then heat it until thick white smoke is emitted to drive off the nitric acid. Add a small amount of water and continue to heat and boil. After cooling, take out the corundum filter cartridge, wash it several times with water, and dry it for the collection of gas and dust samples discharged from the incinerator.

[0020] After the sample is collected, put the corundum filter cartridge together with the gas and dust sample in a beaker, add 7ml (1+1) sulfuric acid, 20ml nitric acid, and 4ml p...

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Abstract

The invention relates to a method for measuring arsenic, in particular to a method for measuring arsenic in gas and dust discharged by a roasting and burning furnace. The method comprises: step one, treating a corundum cylinder by mixed acid hydrolysis; step two, collecting the gas and dust discharged by the roasting and burning furnace through the corundum cylinder treated by the step one, transferring the collected gas and dust to a beaker, and treating the gas and dust through digestion by sulfuric acid, nitric acid solution and perchloric acid to form a sample for measuring; step three, sucking the sample obtained by the treatment in the step two into an ICP quartz tube and analyzing the sample, measuring the sample according to an operation method of an ICP spectrometer, and writing down the concentration; and step four, measuring the blank value and standard curve of a blank corundum filter cylinder similarly; and finally calculating the concentration of the arsenic in the gas and dust discharged by the roasting and burning furnace according to the content of the arsenic in the solution. The method can accurately measure the content of the arsenic in the gas and dust discharged by the roasting and burning furnace so as to realize qualified discharge of hazardous waste burning products.

Description

technical field [0001] The invention relates to a method for determining arsenic, in particular to a method for determining arsenic in gas dust discharged from steelworks. Background technique [0002] According to the requirements of the National Hazardous Waste Incineration Pollution Control Standard (GB 18481-2001), iron and steel enterprises need to regularly measure the arsenic in the exhaust gas dust of steelmaking roasting and incinerators every year. "of. However, in practical applications, since the glass fiber filter cartridge contains many components, after acid digestion, the digestion products produced will often seriously affect the analysis of photometry. Therefore, the silver diethylaminodithioformate spectrophotometric method cannot be used to determine the arsenic composition in the gas dust of steel roasting incinerators. However, the determination of arsenic in exhaust gas dust by graphite furnace atomic absorption spectrometry in water quality cannot b...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
Inventor 蒋文捷董威
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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