Method for rapidly determining iron content of slag

A technology of slag and slag powder, which is applied in the field of chemical analysis and detection, can solve the problems of long time period of iron content, error environment, complicated operation, etc., and achieve the effect of fast measurement speed, simple equipment and accurate detection results

Inactive Publication Date: 2014-05-21
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the disadvantages of the prior art that the time period for testing the iron content in slag is long, the operation is complicated, errors are likely to be caused by uneven sampling, and environmental pollution is likely to be caused, the purpose of the present invention is to provide a method for quickly measuring the iron content in slag

Method used

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  • Method for rapidly determining iron content of slag
  • Method for rapidly determining iron content of slag
  • Method for rapidly determining iron content of slag

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Measuring instruments: vibrating mill, iron tray, magnet, glass rod, electronic balance (2 sets, accuracy 0.1g and 0.001g respectively), oven, infrared drying oven, glass rod

[0024] Determination steps:

[0025] Place the wet slag in an oven at a temperature of 105 to 110°C and dry it to a constant weight, and weigh 70.0 g of the slag with an electronic balance (with an accuracy of 0.1 g);

[0026] Put the weighed slag in the vibration mill to grind the slag. The grinding time of Baosteel’s commonly used slag BG1 and BG2 is t=45s, 60s, 75s, 90s, 120s, 180s respectively. The grinding time of Baosteel Corex slag PG1 The time is t=45s, 60s, 90s, 120s, 180s, 240s, and the grinding time of Baosteel Corex slag PG2 is t=60s, 90s, 120s, 180s, 240s, 300s.

[0027] figure 1 It is a schematic diagram of the assay method of the present invention. In the figure: 1 is the iron tray, 2 is the magnet, 3 is the slag powder after grinding. Weigh 60.0 g of ground slag powder with an...

Embodiment 2

[0042] Measuring instruments: vibrating mill, iron tray, magnet, glass rod, electronic balance (2 sets, accuracy 0.1g and 0.001g respectively), oven, infrared drying oven, glass rod

[0043] Determination steps:

[0044] Place the wet slag in an oven at a temperature of 105 to 110°C and dry it to a constant weight, and weigh 70.0 g of the slag with an electronic balance (with an accuracy of 0.1 g);

[0045] Place the weighed slag in a vibrating mill to grind the slag. The grinding time of commonly used slag BG3 and BG4 in Baosteel is t=40s, 50s, 60s, 70s, 80s, 90s, 100s, 120s respectively.

[0046] Weigh 60.0g of ground slag powder with an electronic balance (accuracy: 0.1g), place the slag powder in an iron tray, place a magnet at the bottom of the tray, wash with water for 5-10min, and stir with a glass rod at the same time , so that the slag and iron are fully separated. During the cleaning process, the slag powder will be taken away with the water flow, while the iron wil...

Embodiment 3

[0056] Measuring instruments: vibrating mill, iron tray, magnet, glass rod, electronic balance (2 sets, accuracy 0.1g and 0.001g respectively), oven, infrared drying oven, glass rod

[0057] Determination steps:

[0058] Place the wet slag in an oven at a temperature of 105 to 110°C and dry it to a constant weight, and weigh 70.0 g of the slag with an electronic balance (with an accuracy of 0.1 g);

[0059] Place the weighed slag in a vibrating mill to grind the slag. The grinding time of commonly used slag BG5 and BG6 in Baosteel is t=30s, 60s, 90s, 100s, 110s, 120s, 130s respectively.

[0060] Weigh 60.0g of ground slag powder with an electronic balance (accuracy: 0.1g), place the slag powder in an iron tray, place a magnet at the bottom of the tray, wash with water for 5-10min, and stir with a glass rod at the same time , so that the slag and iron are fully separated. During the cleaning process, the slag powder will be taken away with the water flow, while the iron will b...

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Abstract

The invention belongs to the technical field of chemical analysis and detection and discloses a method for rapidly determining the iron content of slag. The method comprises the following steps: grinding slag powder for 30-300s, weighing the ground slag powder, arranging the ground slag in a tray, arranging a magnet at the bottom of the tray, flushing the slag powder for 5-10min with water, then arranging iron in the tray in a drying box, drying the iron at the temperature of 105-200 DEG C to constant weight, weighing the mass of the iron and computing the iron content of the slag. A device used in the method is simple and easy to operate, the detection cost is low, the determination speed is high, the detection quantity of samples to be detected is larger, sampling is more typical, errors caused by uneven sampling are avoided, the detection result is relatively accurate, a new choice is added for the determination field, and the method has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and relates to a method for quickly measuring the iron content of slag. Background technique [0002] The glassy substance with high activity formed by the by-products of blast furnace ironmaking melting due to quenching and crystallization is called blast furnace water-quenched slag, commonly known as slag, which contains 0.1% to 5.0% metallic iron. When the slag is ground Metallic iron will be separated from the slag, and the presence of these irons will have a certain impact on the slag grinding, especially the vertical mill. [0003] The determination of iron content in slag has important guiding significance for studying the influence of iron content in slag on vertical mill grinding, so the determination of iron content in slag becomes very important. Although the traditional "potassium dichromate titration" method has accurate measurement results, its operation is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 张树青王振兴翟伟
Owner TONGJI UNIV
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