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Rapid determination method of ash components

A rapid measurement, ash and slag technology, applied in thermal excitation analysis, material excitation analysis, preparation of test samples, etc., can solve the problems of incomplete measurement items, long measurement period, and inability to fully reflect the characteristics of desulfurization ash and slag. The effect of short measurement time, small sample requirement, and range

Inactive Publication Date: 2010-09-01
HEBEI ELECTRIC POWER RES INST
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Problems solved by technology

[0004] However, there is no detection standard for desulfurization ash at present, and the work is carried out with reference to the method of ordinary ash. However, the measurement method of ordinary ash has a long measurement cycle and incomplete measurement items, which cannot fully reflect the characteristics of desulfurization ash.

Method used

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Experimental program
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Effect test

Embodiment 1

[0014] The steps of the present invention are:

[0015] First, before the start of the experiment, according to the general requirements of the analysis experiment, all the utensils used were soaked in high-purity water for 24 hours, and then dried for later use.

[0016] (1) Fully dry 50 g of common ash that has been completely burned and ashed, crush it until it can pass through a 200-mesh test sieve, and weigh 0.0500 g (accurate to 0.0001 g) as an analysis sample.

[0017] (2) Carefully place the weighed 0.0500g analysis sample in the polytetrafluoroethylene inner tube of the digestion tank, carefully add 2.0ml of concentrated hydrochloric acid, 4.0ml of concentrated nitric acid, and 1.0ml of concentrated hydrofluoric acid in sequence along the tube wall. : Shake gently after adding an acid; when adding, wash the solid sample into the solution along the tube wall, and the concentrated hydrochloric acid, concentrated nitric acid, and concentrated hydrofluoric acid used are a...

Embodiment 2

[0024] The steps of the present invention are:

[0025] First, before the start of the experiment, according to the general requirements of the analysis experiment, all the utensils used were soaked in high-purity water for 24 hours, and then dried for later use.

[0026] (1) Fully dry 30g of incompletely ashed desulfurization ash, crush it until it passes through a 180-mesh test sieve, then take 10g and place it in a porcelain boat and burn it at 815°C to 820°C for 60min to burn the desulfurization ash Fully, after cooling, weigh 0.1000g (accurate to 0.0001g) as the analysis sample.

[0027] (2) Carefully place the weighed 0.1000g analysis sample in the polytetrafluoroethylene inner tube of a dry and clean digestion tank, and carefully add 1.9 ml of concentrated hydrochloric acid, 4.1 ml of concentrated nitric acid, and 1.1 ml of concentrated hydrofluoric acid in sequence along the tube wall. ml, Note: Shake gently after each acid is added; when adding, the solid sample shou...

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Abstract

The invention relates to a rapid determination method of ash components, in particular to a rapid determination method of desulfuration ash components, which comprises the steps of: 1, fully crushing a fully combusted ash sample, taking 0.0500-0.1000g of sample as an analysis sample; 2, putting the analysis sample in a polytetrafluoroethylene inner pipe of a digestion tank, sequentially adding concentrated hydrochloric acid, concentrated nitric acid and hydrofluoric acid, carrying out microwave digestion under a certain condition to obtain a digestion product; 3, completely dissolving the digestion sample into a polypropylene volumetric flask by using a diluted nitric acid solution to obtain an analysis solution by meter volume; and 4, determining contents of all components in the analysis solution by using an inductively coupled plasma optical emission spectroscopy. The invention has short determining time and simple process and can be used for determining multiple and complete components.

Description

technical field [0001] The patent of the present invention relates to a rapid determination method of ash components, especially a rapid determination method of desulfurization ash components. Background technique [0002] The determination of the chemical components of common ash and slag is routinely carried out in GB / T1574-1995. The sample pretreatment of this method is the muffle furnace high-temperature alkali fusion method, that is, the sample is melted at a high temperature in the muffle furnace after adding ethanol and sodium hydroxide, and water After chilling, add boiling water for leaching, add hydrochloric acid, heat to dissolve and filter under constant stirring, measure the silicon, iron and titanium components in the filtrate by spectrophotometry, and measure the aluminum, calcium and magnesium components in the filtrate by volumetric method, The four elements of sulfur, phosphorus, potassium and sodium also require three different sample pretreatments and thr...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/44
Inventor 石景燕刘克成何彩燕
Owner HEBEI ELECTRIC POWER RES INST
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