Sampling vessel for measuring cooling temperature of molten metals

Abstract

A sampling vessel (10) to be used for analyzing molten metals is separated by a partition (14) so as to form an upper room (16) and a lower room (18). The partition (14) is provided with one or plurality of openings (20). Accordingly, the molten metals poured into the vessel (10) can contact with a large inner surface of the vessel (10).

Description

BACKGROUND

The present invention relates to a sampling vessel for measuring cooling temperature of molten metals in order to examine the constituents of molten cast iron, steel and light metals

In general, the examination of the constituents of the above metals is carried out by using a cup-shape vessel which is made from refractory material such as ceramics. The high temperature molten metal corrected from a blast furnace is poured into the vessel as a sample.

In order to investigate the properties of the molten metal before casting, the high temperature molten metal is pouring into the sampling vessel having a temperature sensor, for example, a rod-like alumel-chromel thermocouple, is extended perpendicularly from the bottom of the cup, and a lower end of the thermocouple is connected with a thermometer for constructing a cooling curve of the molten metal in the vessel.

The sampling vessel in the above is already well-known in the prior art, as shown in under:

Japanese Patent No. 2,117,577,

Japanese Patent No. 2,510,947,

U.S. Pat. No. 4,261,740 and others.

According to the usual prior art sampling vessel, it takes much time for analysing the constituents of the high temperature molten metal having 600° C. or more which is obtained from the blast furnace in order to fall it down to a desired temperature, and on the other hand, the temperature of the molten metal in the blast furnace must be maintained its original high temperature.

However, as the operation of the blast furnace requires large amounts of electric power, it is very expensive to keep the high temperature of the molten metal in the furnace. It is, therefore, it is required to save the time for measuring the temperature change of the molten metal in the vessel.

OBJECTS OF THE INVENTION

In view of the above, it is a principal object of the present invention to provide a sampling vessel to save the time for thermal analyzing of the high temperature molten metal therein.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a longitudinal section of the sampling vessel for measuring a cooling curve of the molten metal according to the present invention;

FIG. 2 is a plan view of FIG. 1; and

FIG. 3 is a modification of the sampling vessel according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1, ther is illustrated a longitudinal section of the sampling vessel for measuring a cooling curve of the molten metal according to the present invention. the sampling vessel 10 is a cylindrical main body 12, which is made from refractory material such as, for example, ceramics.

The interior of the sampling vessel 10 is separated by a partition 14 so as to form an upper room 16 and under room 18. An opening 20 is provided in the center of the partition 14 so as to the molten metal poured into the upper room 16 is flow into the under room 18, and both room 16 and 18 are respectively filled with the molten metal.

A thermocouple 24 is fixed to the bottom 22 and is extended vertically from the bottom 22 to under the opening 20 of the partition 14. The lower end of the thermocouple 24 is connected to a well-known automatic temperature measuring devices, which is not shown in the drawings.

If the molten metal having temperature of about 1500° C. is poured into the sampling vessel 10 of the present invention from the blast furnace, the temperature of the molten metal is lowered down at least 150° C. therefrom before the vessel 10 is filled with the molten metal, because the molten metal contacts with the inner surfaces of the vessel separated with the upper room 16 and the under room 18 by means of the partition 14 having the opening or openings 20.

According to the sampling vessel 10 of the invention, the temperature of the molten metal which poured into the vessel 10 can be lowered at the high-velocity than the usual sampling vessel, and therefore, when the sampling vessel 10 of the present invention is employed, the operating time of the furnace can be shorten than the prior art usual sampling vessel is employed.

Claims

1. A sampling vessel for measuring cooling temperature of molten metals, comprising a cylindrical main body (12), a partition (14) for separating the main body (12) to an upper room (16) and a lower room (18), and an opening (20) provided to the partition (14) in order to flowing the molten metals which poured into the upper room (16) of the main body (12) into the lower room (18) so as to contact the molten metals with the wide surface in the vessel.

2. A sampling vessel claimed in claim 1 in which the opening (20) is formed in the center of the partition (14).

3. A sampling vessel claimed in claim 1 in which a plurality of opening (20) are provided to the partition (14).