Method for preparing multiple liquid metal samples for once

Abstract

The invention relates to a method for preparing multiple liquid metal samples for once. The method comprises the following steps: preparing a multi-cavity sampler for the samples, wherein the sampler is characterized in that the external walls of a protective paper pipe and an air exhaust paper pipe of a protective gun are respectively coated with a refractory material layer with the thickness of 1.5mm, a plurality of samplers with single-cavity structures are fixed together, a holding gun rod is fixed together with the samplers with the single-cavity structures, and the holding gun rod is fixedly connected with a holder; accurately selecting the insertion point of a steel liquid surface; utilizing the holder to drive the samplers with the single-cavity structures to be rapidly inserted into the position which is 600mm below the steel liquid surface for 5 seconds along a mechanical track; transferring the holder and the samplers with the single-cavity structures to a steel ladle operating platform; taking out casting molds and rapidly putting the casting mold the samples in the casting molds into water with the temperature of 20 DEG C for 1 minute; and cooling, peeling, cutting and grinding the casting molds for 5 minutes. The invention has the advantages that the sampling success rate is 99.9%; the total time for preparing the samples is short; the accuracy of the chemical analysis conclusion on the liquid steel is high; and the uniformity is high.

Description

Technical field: [0001] The invention belongs to sample preparation for liquid metal chemical composition analysis. Background technique: [0002] Existing liquid metal samplers are single-chamber structures made of materials such as sand molds, ceramics, metal molds, and quartz glass, or combinations of these materials, and the sample volumes obtained are small (diameter of paper tube ￠50~60mm× Length 400mm) and only one sample can be obtained at a time. If multiple samples are needed to analyze the representativeness and uniformity of the chemical composition of the molten metal ladle in a certain cross-section, multiple sampling operations must be performed. Due to the Influenced by factors such as temperature and sampler insertion depth, angle, time interval, point position, etc., the data of each sampling is different, resulting in a large error in the analysis data. Invention content: [0003] In order to reduce analysis errors and obtain several samples at one time...

AI Technical Summary

Problems solved by technology

[0002] Existing liquid metal samplers are single-chamber structures made of materials such as sand molds, ceramics, metal molds, and quartz glass, or combinations of these materials, and the sample volumes obtained are small (diameter of paper tube ￠50~60mm× Length 400mm) and only one sample can be obtained at a time. If multiple samples are needed to analyze the representativeness and uniformity of the chemical composition of the molten metal ladle in a certain cross-section, multiple sampling operations must be performed. Due to the Influenced by factors such as temperature and sampler insertion depth, angle, time interval, point position, etc., the data of each sampling is different, resulting in a large error in the analysis data

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