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A method for measuring manganese element content in manganese-rich slag

A technology of element content and manganese-rich slag, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problems of low work efficiency, cumbersome processing process, and many interference factors

Active Publication Date: 2018-09-28
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sample pretreatment process of these methods is cumbersome, there are many interference factors, and the work efficiency is low.
And, in conventional analysis, there is only titration analysis method for the determination method that manganese content is greater than 10%, and the standard solution used is ammonium ferrous sulfate solution, and the concentration of ammonium ferrous sulfate solution is unstable at room temperature, so it must be calibrated every time it is titrated. , wasting manpower and material resources

Method used

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  • A method for measuring manganese element content in manganese-rich slag
  • A method for measuring manganese element content in manganese-rich slag
  • A method for measuring manganese element content in manganese-rich slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: Determination of the content of manganese element in the manganese-rich slag

[0041] Take 0.1000 g of the manganese-rich slag sample to be tested and place it in a 400 mL beaker, add 20 mL of hydrochloric acid and 10 mL of nitric acid solution, heat to dissolve at 100 ° C, transfer it to a 100 mL volumetric flask after cooling, add water to volume and shake well to obtain the solution to be tested.

[0042] Weigh 2.0000g of electrolytic manganese (99.9%) into a 250mL beaker, add 40mL of nitric acid, heat to dissolve, boil to drive out nitrogen oxides, cool to room temperature, transfer to a 1000mL volumetric flask, add water to volume and shake well to obtain 2 mg / mL Manganese standard stock solution.

[0043] Take six 100mL volumetric flasks, add 20mL hydrochloric acid and 10mL nitric acid respectively, heat and concentrate at 100°C to a volume of about 5mL, take them down and cool. Then measure 0mL, 2.50mL, 5.00mL, 10.00mL, 15.00mL, and 20.00mL of 2 mg...

Embodiment 2

[0055] Embodiment 2: The detection limit of manganese element content in manganese-rich slag determined by ICP-AES method

[0056]The detection limit of the sample is the mass concentration at which the signal is equal to three times the standard deviation of the signal of the blank solution measured. Take a sample blank solution and measure it 11 times with the same method, and calculate the mass concentration when the standard deviation of the blank solution is 3 times to be 0.0016 μg / mL, which is the detection limit of manganese (Table 2). This detection limit is very low, indicating that the manganese content is very low, and the manganese content in the manganese-rich slag is very high, which can be detected by the instrument.

[0057] Table 2 Curve equation and detection limit for the determination of manganese content in manganese-rich slag by ICP-AES

[0058] element

Embodiment 3

[0059] Embodiment 3: recovery rate test

[0060] Select 3 samples with known measured values, add 0.50 mL, 1.00 mL, and 1.50 mL of 2 mg / mL manganese standard solution respectively, convert the added manganese standard solution into percentage content, and measure the The recoveries of the three samples were calculated from the total amount of the three samples, and the recoveries were all in the range of 95% to 105%, indicating that the analytical method had good accuracy.

[0061]

[0062] In summary, the method of the present invention is simple and quick to operate, low in cost, and the result has good stability, reproducibility and accuracy, and can meet the daily determination requirements of manganese element content in manganese-rich slag.

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Abstract

The invention discloses a method for determining manganese element content in rich-manganous slags. The method adopts an inductively coupled plasma-atomic emission spectrometry (ICP-AES) method to determine the manganese element content in the rich-manganous slags, and specifically comprises treating a sample, preparing a standard stock solution, preparing a series of standard working solutions, drawing a working curve, measuring the content and the like. The method is simple, convenient and fast in operation, low in cost, and capable of meeting the determining requirements on the manganese element content in the daily rich-manganous slags, and a result has better stability, reproducibility and accuracy.

Description

technical field [0001] The invention belongs to the technical field of chemical component analysis, further belongs to the technical field of element component analysis of smelting slag in the metallurgical industry, and specifically relates to a method for measuring the content of manganese element in manganese-rich slag. Background technique [0002] Manganese-rich slag is an intermediate product in the smelting process of manganese ore. Its production process is to mix manganese-poor ore with high iron content and high phosphorus content that cannot be directly used for smelting, and add insufficient carbon as a reducing agent. Under low furnace temperature and acidic slag, the iron and phosphorus can be fully reduced, and the manganese can be kept in the slag to the maximum extent, so as to obtain a manganese-rich slag with high manganese, low iron, and low phosphorus. Manganese-rich slag can be further refined to obtain metallic manganese, and can also be used as raw ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 陈涛陶俊高丽萍周明珠
Owner WUKUN STEEL