Method for measuring potassium and sodium in high titanium blast furnace slag

A blast furnace slag, high titanium technology, applied in the field of chemical analysis, can solve the problems of large influence of the element to be measured, inaccurate measurement results, spectral interference, etc., to achieve the effect of fast sample dissolution, not easy to contaminate and decompose, and accurate results.

Pending Publication Date: 2022-03-15
PANZHIHUA UNIV
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Problems solved by technology

High-titanium blast furnace slag is an insoluble compound paragenetic mineral, its main components are iron oxide, titanium oxide, silicon oxide, aluminum oxide, magnesium oxide and a small amount of sulfur, phosphorus, potassium, sodium compounds; the main phase is magnetic Iron ore (Fe 3 o 4 ) and titanium magnetite (Fe 0.23 (Fe 1.95 Ti 0.42 )O 4 ), followed by ilmenite (FeTiO 3 ), because the high-titanium blast furnace slag is difficult to dissolve completely during the digestion process, and its coexisting elements such as iron, titanium, silicon, and aluminum interfere with the spectrum of the measured elements, and the matrix effect of iron has a greater impact on the measured elements, which will lead to Complicated, time-consuming, and inaccurate measurement results

Method used

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  • Method for measuring potassium and sodium in high titanium blast furnace slag
  • Method for measuring potassium and sodium in high titanium blast furnace slag
  • Method for measuring potassium and sodium in high titanium blast furnace slag

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Embodiment 1

[0059] a. Microwave digestion: Weigh 0.5000g high-titanium blast furnace slag standard sample, add 8mL hydrochloric acid, 5mL hydrofluoric acid, 5mL water, pre-digest until no yellow smoke is emitted, perform microwave digestion in the digestion apparatus, and set the pressure of the digestion apparatus The rate of rise is 31.5kPa / s, the upper limit of pressure is 3990kPa, and the upper limit of temperature is 240°C. First, the temperature is raised at 300W for 10 minutes and kept for 5 minutes, then the temperature is raised at 600W for 10 minutes and kept for 10 minutes. In the bottle, dilute to volume with water and mix to obtain the test solution;

[0060] b. Preparation of blank solution and standard solution: Weigh 30g of pure iron, add 500mL of hydrochloric acid, heat at 50-80°C for 2-3 hours to dissolve slowly, add dropwise 20-30mL of nitric acid for oxidation, cool down, dilute to 1000mL with water, mix Mix evenly to obtain an iron matrix solution; take 10 mL of the i...

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Abstract

The invention discloses a method for determining potassium and sodium in high titanium blast furnace slag, which comprises the following steps: treating the high titanium blast furnace slag by a hydrochloric acid-hydrofluoric acid-water system by a microwave digestion method, preparing a blank solution and a standard solution, drawing a calibration curve, and determining by using inductively coupled plasma atomic emission spectrometry according to the drawn calibration curve. The method has the advantages of high sample dissolving speed, difficult sample pollution, complete decomposition, simple and safe operation, no sample loss and accurate result. K769.896 nm and Na588.995 nm are selected as analysis spectral lines, the content of potassium and the content of sodium are measured at the same time through inductively coupled plasma atomic emission spectrometry, an iron matrix solution is added to eliminate the matrix effect of iron, and the result is accurate and stable.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a method for measuring potassium and sodium in high-titanium blast furnace slag. Background technique [0002] High-titanium blast furnace slag is a compound ore with symbiotic elements such as vanadium, titanium, and iron, and has high comprehensive utilization value. With the development of production and the increasing requirements for product quality, the requirements for the analysis of trace elements potassium and sodium in high-titanium blast furnace slag are also higher. At present, the analysis of potassium and sodium in high-titanium blast furnace slag generally adopts the national standard method GB 6730.49-1986 "Iron Ore Chemical Analysis Methods Atomic Absorption Spectrophotometry Determination of Sodium and Potassium", but this method is not suitable for high-titanium blast furnace slag. For this kind of symbiotic composite ore, the sample decomposition i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 毛润莎霍红英王意霞刘斯阅杨丽清
Owner PANZHIHUA UNIV
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