Method for testing melting speed of continuous casting powder

A technology of continuous casting mold flux and melting rate, applied in the field of steelmaking, can solve problems such as difference in measurement results, and achieve the effect of low measurement cost

Inactive Publication Date: 2012-02-08
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the different measurement methods, the

Method used

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  • Method for testing melting speed of continuous casting powder
  • Method for testing melting speed of continuous casting powder
  • Method for testing melting speed of continuous casting powder

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Embodiment 1

[0024] A method for testing the melting rate of continuous casting mold flux, characterized in that:

[0025] (a) Use a balance to weigh three mold powder samples, each of which is: 1.497 grams, 1.502 grams, and 1.496 grams;

[0026] (b) When heating up, put the crucible into the furnace, raise the temperature of the furnace to 1350°C, the temperature fluctuation error is ±20°C, and keep the temperature constant for 20 minutes;

[0027] (c) Take out the crucible from the furnace, quickly add a sample of the mold flux to be tested into the crucible and put it into the furnace together, and start the stopwatch at the same time to mark the time, that is, from the time when the sample is put into the furnace to when the last dark spot of the sample turns bright The time required to record the complete melting of the sample is 2100 seconds;

[0028] (d) Measure and calculate the surface area of ​​the inner bottom of the crucible to be 314mm 2 , according to the formula MR=W / τ·A, ...

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Abstract

The invention relates to a method for testing the melting speed of continuous casting powder. The method is characterized by comprising the following steps of: weighing three parts of casting powder samples by using a scale, wherein each part is 1.49-1.51 g; in the event of raising the temperature, placing a crucible in a furnace, raising the temperature of the furnace to 1350 DEG C, wherein the temperature fluctuation error is +/- 20 DEG C, and keeping the constant temperature for 20 min; taking out the crucible from a hearth, rapidly adding a part of casting powder sample to be tested into the crucible, putting the sample together with the crucible in the furnace, simultaneously, stating a stopwatch to time, and recording the time required for completely melting the sample, namely the time for putting the sample in the hearth till the last dark spot is brightened; calculating the melting speed according to the formula MR=W/tau*A; and repetitively testing according to the above steps and calculating other samples, and then solving an average value to obtain the melting speed MR of the casting powder under the 1350 DEG C condition. The invention aims to provide the method, which is capable of simulating the one-way heating and melting condition of the casting powder on a steel level in a crystallizer and true reflecting the melting speed of the casting powder.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and relates to a method for testing the melting speed of continuous casting mold slag. Background technique [0002] Among the properties of mold flux, melting speed is one of the important physical properties, and it is a physical quantity that reflects the melting speed of mold flux. The melting speed determines the melting model structure formed by the mold slag on the molten steel surface in the mold. When the mold slag is added to the molten steel surface of the mold, it is required to maintain a stable slag layer and powder slag layer with a certain thickness. If the powder slag layer melts too fast, the slag surface is not easy to maintain, and the slag is exposed to the atmosphere, so that some floating objects, oxide films, sintered particles, etc. often appear on the surface of the slag layer. This kind of slag with floating matter flows into the gap between the billet shell and the...

Claims

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Application Information

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IPC IPC(8): G01N25/02
Inventor 陈建新
Owner INNER MONGOLIA BAOTOU STEEL UNION
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