Device for detecting and analyzing steelmaking high-temperature liquid-state furnace slag components on line

Abstract

The invention relates to the technical field of metallurgical detection and particularly relates to a device for detecting and analyzing steelmaking high-temperature liquid-state furnace slag components on line. The device comprises a rapid furnace slag component analyzer and an optical probe, wherein the rapid furnace slag component analyzer comprises a laser device, a controller, a wave spectrometer and a probe guide tube which are connected with each other through transmission of electrical signals; the optical probe comprises a hollow circular tube and a glass window; the glass window is fixed at one end of the hollow circular tube; the other end of the hollow circular tube is in an opening state. According to the device for detecting and analyzing the steelmaking high-temperature liquid-state furnace slag components on line, an inserted type high-temperature-resistant probe is used and is in direct contact with the furnace slag, so that the furnace slag components can be rapidly analyzed on line; the processes of sampling, cooling and preparing samples are not needed; the high-temperature furnace slag components are directly analyzed; the sampling analysis period is shortened;the requirements on real-time feedback of the furnace slag components and on-line adjustment of the furnace slag components can be met; the analysis time is less than 20 seconds.

Description

technical field [0001] The invention relates to the technical field of metallurgical detection, in particular to an on-line detection and analysis device for steelmaking high-temperature liquid slag components. Background technique [0002] In the process of steelmaking, according to the differences in the composition and performance of the steel being made, different types of slagging agents need to be added during the smelting process, including lime, fluorite, Baiyunshan, iron ore and pre-melted slag. After smelting, slags of different compositions and physical properties are formed. These slags react chemically and physically with impurity elements in molten steel to form different sulfides, phosphides and oxides, etc., to remove these sulfur and phosphorus from molten steel. , Oxygen and other harmful elements and the technical effect of inclusions, thereby improving the cleanliness of molten steel and improving the performance of steel; therefore, the composition of sl...

AI Technical Summary

Problems solved by technology

At present, the analysis of slag components generally adopts the off-line analysis method. First, the slag samples are taken in the furnace, and solid slag particles are formed after cooling down. The solid slag particles are pressed into tablets and then sent to the laboratory for analysis. The whole process generally takes 8-30 minutes to analyze slag by X-ray fluorescence spectrometry; if chemical analysis method is used, it will take several days. It is an offline method and takes a long time

However, the pace of steelmaking and smelting is very fast, usually about 30 minutes for a furnace of steel. Since the composition information of the slag cannot be quickly fed back online, it has a great impact on the precise control of the composition and target of steelmaking and smelting.

[0004] In the prior art, Chinese patent (notification number: CN102305785A, announcement date: 2012.01.04) discloses a real-time on-line detection device for molten slag components, which uses a non-contact analysis method to form excitation points on the slag surface by focusing. In fact, due to the agitation of molten steel in the steelmaking process, the liquid level of the slag fluctuates greatly and is changing violently, making it difficult to form aggregation points.

[0005] In addition, the 2014 National Steelmaking Academic Conference published an article "Automatic On-line Analysis of Chemical Composition Contents of Converter Slag and Refining Slag". Sample preparation followed by fluorescence analysis is actually an off-line analysis method, but the article has centralized processing of these devices to shorten the analysis time. The analysis time required for the record in the article is 9 minutes and 20 seconds, which cannot meet the requirements of online real-time analysis. need

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