Method for analyzing the components of particulate ironmaking raw materials and apparatus for analyzing the components of particulate ironmaking raw materials

Abstract

To accurately measure a component composition of a particular iron-making material by using a laser-induced breakdown emission spectral analysis method.SOLUTION: A component analysis method of a particular iron-making material according to the present invention comprises: a pre-treatment process of emitting a laser beam having the laser power density of 2-20 GW / cm2 to the particular iron-making material; and a component analysis process of performing component analysis by means of laser-induced breakdown emission spectral analysis by emitting the laser beam for analysis to at least a portion of a spot irradiated with the laser beam in the pre-treatment process.SELECTED DRAWING: Figure 1A

Claims

1. A method for analyzing the components of particulate ironmaking raw materials, For the aforementioned particulate ironmaking raw material, the laser power density is 2 to 20 GW / cm². ２ A pretreatment step in which laser light is irradiated, A component analysis step is performed by irradiating at least a portion of the area irradiated with laser light in the pretreatment step with analytical laser light, thereby performing component analysis by laser-induced breakdown emission spectroscopy. It has, A method for analyzing the components of particulate ironmaking raw materials, wherein the pretreatment step involves irradiating the particulate ironmaking raw materials with laser light to sinter the surface of the particulate ironmaking raw materials and remove moisture from the particulate ironmaking raw materials.

2. The method for analyzing the components of particulate ironmaking raw materials according to claim 1, wherein the particulate ironmaking raw materials located on the conveying surface of the conveying equipment and being conveyed by the conveying equipment are the subject of analysis.

3. Between the aforementioned pretreatment step and the aforementioned component analysis step, there is further a height measurement step in which the height of the particulate ironmaking raw material located on the conveying surface is measured using laser light. The method for analyzing the components of particulate ironmaking raw materials according to claim 2, wherein the component analysis step involves performing laser-induced breakdown emission spectroscopy on the particulate ironmaking raw material that has been irradiated with laser light in the pretreatment step and whose height has been measured in the height measurement step.

4. The method for analyzing the components of particulate ironmaking raw materials according to any one of claims 1 to 3, wherein in the pretreatment step, a laser with a higher emission rate than the analytical laser used in the component analysis step is used to irradiate the surface of the particulate ironmaking raw material with laser light while scanning it.

5. The method for analyzing the components of particulate ironmaking raw materials according to any one of claims 1 to 3, wherein the timing of laser light irradiation is controlled in the component analysis step so that at least a portion of the area irradiated with laser light in the pretreatment step is the target of analysis.

6. The method for analyzing the components of particulate ironmaking raw materials according to any one of claims 1 to 5, wherein the irradiation area of ​​the laser light used in the pretreatment step is larger than the irradiation area of ​​the analytical laser light used in the component analysis step.

7. The method for analyzing the components of particulate ironmaking raw materials according to any one of claims 1 to 6, wherein the size of the particulate ironmaking raw material is from one micron to 10 mm.

8. The particulate ironmaking raw material is powdered ore, dust or shredder dust generated in the ironmaking process, or ingots, as described in any one of claims 1 to 7, for the method of component analysis of particulate ironmaking raw materials.

9. A component analyzer for particulate ironmaking raw materials, For particulate steelmaking raw material particles, a laser power of 2 to 20 GW / cm² is used. ２ A laser light source for pretreatment irradiates the surface of the particulate ironmaking raw material with laser light to solidify it and remove moisture from the particulate ironmaking raw material, An analytical laser light source is used to irradiate at least a portion of the area irradiated with laser light from the aforementioned pre-processing laser light source with analytical laser light, A spectral detection unit that detects the emission induced by the laser light irradiated from the aforementioned analytical laser light source while performing spectral analysis, A component analysis unit performs component analysis of the particulate ironmaking raw material based on the detection results from the spectroscopic detection unit, A component analyzer for particulate ironmaking raw materials, equipped with the necessary components.

10. This analyzes the particulate ironmaking raw material being transported on the transport surface of the transport equipment. The component analysis apparatus for particulate ironmaking raw materials according to claim 9, wherein the analytical laser light source and the spectroscopic detection unit are located downstream of the pre-processing laser light source in the transport direction.

11. A distance measuring laser light source for irradiating the particulate ironmaking raw material located on the conveying surface is located upstream of the analytical laser light source in the conveying direction, and a distance measuring unit for measuring the height of the particulate ironmaking raw material is provided, A control unit that controls the driving of the pre-processing laser light source, the analysis laser light source, and the distance measuring laser light source, Furthermore, The control unit further controls the focal position of the analytical laser light source, The component analysis apparatus for particulate ironmaking raw materials according to claim 10, wherein the analytical laser light source irradiates at least a portion of the area that is irradiated with laser light from the pre-processing laser light source and also irradiated with laser light from the distance measuring laser light source.

12. The particulate ironmaking raw material is powdered ore, dust or shredder dust generated in the ironmaking process, or ingots, as described in any one of claims 9 to 11, and is a component analyzer for particulate ironmaking raw materials.

Images