• 検索結果がありません。

レーザ発光分光分析による溶銑の直接分析

N/A
N/A
Protected

Academic year: 2021

シェア "レーザ発光分光分析による溶銑の直接分析"

Copied!
8
0
0

読み込み中.... (全文を見る)

全文

(1)

川崎製鉄技報

KAWASAKI STEEL GIHO Vol.21 (1989) No.2

レーザ発光分光分析による溶銑の直接分析

Direct Analysis of Molten Iron by Laser Emission Spectrometry

谷本 亘(Wataru Tanimoto) 山本 公(Akira Yamamoto) 角山 浩三(Kouzou Tsunoyama) 要旨 : 溶融金属を試料採取することなく分析する直接分析法として,レーザー光を励起源とした 発光分光分析法を開発した。大出力パルスレーザ光を出力2Jで試料表面に集光照射すれば, 効率よく励起できること,励起光のうち,レーザー光照射直後の1μsec 間には,強い連続 光が放出され,その後放出される光を分析に用いれば,固体,溶融状態試料の定量分析が できることを明らかにした。sらに高炉鋳床で溶銑を直接分析する際の湯面の上下動,湯 面角度,湯温の変化による影響を受けないことを確認した。スキンマ通過直後の湯溜りに おいて現場実験し,Cを±0.1 Wt. %,Si, Mn, P を±0.2 Wt.%, S を±0.1 Wt.%の誤差で分 析できた。 Synopsis :

An application of a laser emission spectrometry to the in situ analysis of the molten metal was investigated. Effective exitation of the samples was achieved by using a Q-switched-pulse, high energy (2J) laser beam. It was found that strong and continuous emission light appeared for 1 μsec after irradiation, which caused poor accuracy. The analytical accuracy was greatly improved by measuring the light emitted after initial 1μsec of the emission.This method was not disturbed by the fluctuations of the surface level, tilt angles and temperatures of the molten metal during the continuous analysis. The analytical error was ±0.1 Wt. % for C, ±0.2 Wt. % for Si, Mn, P and ±0.1 Wt. % for S when the molten iron was analyzed continuously at a skimmer of the blast furnace. (c)JFE Steel Corporation, 2003

本文は次のページから閲覧できます。

要約版

(2)
(3)
(4)
(5)
(6)
(7)
(8)

参照

関連したドキュメント

It is suggested by our method that most of the quadratic algebras for all St¨ ackel equivalence classes of 3D second order quantum superintegrable systems on conformally flat

Recently, Velin [44, 45], employing the fibering method, proved the existence of multiple positive solutions for a class of (p, q)-gradient elliptic systems including systems

This paper develops a recursion formula for the conditional moments of the area under the absolute value of Brownian bridge given the local time at 0.. The method of power series

Answering a question of de la Harpe and Bridson in the Kourovka Notebook, we build the explicit embeddings of the additive group of rational numbers Q in a finitely generated group

Then it follows immediately from a suitable version of “Hensel’s Lemma” [cf., e.g., the argument of [4], Lemma 2.1] that S may be obtained, as the notation suggests, as the m A

To derive a weak formulation of (1.1)–(1.8), we first assume that the functions v, p, θ and c are a classical solution of our problem. 33]) and substitute the Neumann boundary

Our method of proof can also be used to recover the rational homotopy of L K(2) S 0 as well as the chromatic splitting conjecture at primes p > 3 [16]; we only need to use the

In this paper we focus on the relation existing between a (singular) projective hypersurface and the 0-th local cohomology of its jacobian ring.. Most of the results we will present