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Automatic sampling and analyzing method of 4 types of slag samples in front of steel smelting furnace

A technology for iron and steel smelting and analysis methods, which is applied to automatic sample preparation and analysis of converter slag, refining slag and mold slag samples, automatic sample preparation and analysis of 4 kinds of slag samples before steel smelting furnace, and blast furnace slag field. Solve the problems of inability to realize automatic analysis of various slag samples, low precision and accuracy of slag sample analysis, cross-contamination and tableting, etc., to achieve the effect of ensuring analysis accuracy, sample uniformity, and timely analysis data

Inactive Publication Date: 2012-06-27
HEBEI SHOUGANG QIAN AN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the inability to realize the automatic analysis of various slag samples in the same production line and the precision of slag sample analysis existing in the existing four kinds of slag sample automatic sample preparation and analysis methods for iron and steel smelting furnaces. In order to avoid defects such as low precision and accuracy, a new automatic sample preparation and analysis method for blast furnace slag, converter slag, refining slag and mold slag in iron and steel smelting furnace is provided. Cross-contamination and the problems of incomplete tablet pressing and fragile samples when analyzing four kinds of slag samples in one production line, realize the automatic analysis of four kinds of slag samples of iron and steel smelting blast furnace slag, converter slag, refining slag and mold slag

Method used

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  • Automatic sampling and analyzing method of 4 types of slag samples in front of steel smelting furnace
  • Automatic sampling and analyzing method of 4 types of slag samples in front of steel smelting furnace
  • Automatic sampling and analyzing method of 4 types of slag samples in front of steel smelting furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Coarsely crush the slag sample. Set the quantitative volume of slag sample crushing to 200ml, the crushing time to 10s, and the dry cleaning time of the crusher to 10s.

[0020] (2) Carry out 5 processes of material cleaning→slag iron separation→binder cleaning→material grinding→cleaning after grinding to ensure that there is no cross-contamination during the grinding process. Set the tailing grinding time of the sample mill to 20s, the quantitative cup cleaning time to 20s, the magnet separation time to 20s, the amount of binder added for the first time is 3 grains, the grinding time is 20s, the amount of binder added for the second time is 12 grains, and the grinding time is 120s. The dry cleaning time is 100s.

[0021] (3) Compress the sample into tablets. Set the tablet pressing pressure of the tablet press to 120KN, the pressure rise time to 9s, the pressure holding time to 20s, the pressure drop time to 20s, the pressure drop to 50KN, the time to clean the i...

Embodiment 2

[0038] (1) Coarsely crush the slag sample. Set the slag sample crushing quantitative volume to 500ml, crushing time to 5s, and crusher dry cleaning time to 5s.

[0039] (2) Carry out 5 processes of material cleaning→slag iron separation→binder cleaning→material grinding→cleaning after grinding to ensure that there is no cross-contamination during the grinding process. Set the tailing grinding time of the sample mill to 10s, the quantitative cup cleaning time to 10s, the magnet separation time to 20s, the amount of binder added for the first time is 2 grains, the grinding time is 10s, the amount of binder added for the second time is 5 grains, and the grinding time is 80s. The dry cleaning time is 40s.

[0040] (3) Compress the sample into tablets. Set the tablet pressing pressure of the tablet press to 60KN, the pressure rise time to 5s, the pressure holding time to 10s, the pressure drop time to 10s, the pressure drop to 20KN, the time to clean the pressure head to 25s, the...

Embodiment 3

[0057] (1) Coarsely crush the slag sample. Set the quantitative volume of slag sample crushing to 400ml, the crushing time to 8s, and the dry cleaning time of the crusher to 8s.

[0058] (2) Carry out 5 processes of material cleaning→slag iron separation→binder cleaning→material grinding→cleaning after grinding to ensure that there is no cross-contamination during the grinding process. Set the tailing grinding time of the sample mill to 15s, the quantitative cup cleaning time to 15s, the magnet separation time to 20s, the amount of binder added for the first time is 1 grain, the grinding time is 1s, the amount of binder added for the second time is 1 grain, and the grinding time is 60s. The dry cleaning time is 20s.

[0059] (3) Compress the sample into tablets. Set the tablet pressing pressure of the tablet machine to 90KN, the pressure rise time to 7s, the pressure holding time to 15s, the pressure drop time to 15s, the pressure drop to 40KN, the time to clean the indenter...

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Abstract

The invention discloses an automatic sampling and analyzing method of blast furnace slag, converter slag, refining slag and protecting slag in front of a steel smelting furnace. The method comprises steps that: (1) a sample requiring analysis is roughly crushed; (2) the roughly-crushed sample is washed, and is subject to slag-iron separation; a bonding agent is added to the separated slag sample, and the mixture is grinded; the grinded slag sample is washed, and is preserved for later use; (3) with an automatic wafer pressing machine, the sample is pressed into a wafer used in fluorescence analysis; and components in the slag sample are analyzed by using X-fluorescence spectrum. According to the invention, through experiments, optimal grinding parameters in the slag sample automatic sampling and analyzing method are obtained by screening. A cross-contamination problem possible to be caused by various steps such as grinding and pressing is avoided by ways of air cleaning, sample washing, bonding agent washing, and the like, such that analysis precision is ensured. Also, with the method, parameters such as optimal pressing pressure and pressure maintaining time are determined, such that slag samples can be successfully pressed into wafers. The prepared samples are uniform, complete, and firm. Data analysis is in time and accurate. With the method, automatic sampling and analyzing of the four slag samples are realized.

Description

technical field [0001] The present invention relates to fully automatic sample preparation and analysis methods for four types of slag samples before iron and steel smelting furnaces, in particular to fully automatic sample preparation and analysis methods for blast furnace slag, converter slag, refining slag and mold slag before steelmaking and ironmaking furnaces , belonging to the field of sample preparation and analysis of slag samples before iron and steel smelting furnaces. Background technique [0002] At present, domestic and foreign iron and steel enterprises in China mostly use automatic analysis to complete the automatic sample preparation and analysis of steel slag and iron slag in front of the furnace to ensure the timeliness of sample analysis. However, due to the presence of various types of blast furnace slag, converter slag, refining slag, and mold slag in front of steelmaking and ironmaking furnaces, the content of their chemical components varies greatly, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223G01N1/34G01N1/28
Inventor 杜士毅沈涛刘飞宇金伟
Owner HEBEI SHOUGANG QIAN AN IRON & STEEL CO LTD
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