SU1488716A1 - Device for taking samples of liquid melts - Google Patents

Description

The invention relates to non-ferrous metallurgy and can be used. for sampling the melt through the horizontal forms of the melting units and monitoring the end of the process. The invention allows to increase the representativeness of the sample and simplify the device. This is achieved by the fact that the cylindrical sampler 1 is connected to the hollow rod 3 coaxially and is made so that the ratio of the diameter of the hole 5 in its wall, its internal diameter and the internal diameter of the hollow rod 3 is 1: (1.1-1.8) :( 2.0-3.0), respectively. 4 ill., 1 tab.

Phie. one

3

four

14887

The invention relates to the field of non-ferrous metallurgy and can be used for sampling payments through horizontal tuyeres of melting units and controlling the end of the technological process.

The purpose of the invention is to increase the representativeness of the sample and simplify the device. YU

FIG. 1 shows a device for sampling liquid melts, a general view; in fig. 2 - the general position of the tuyere under blast; in fig. 3 - the working position of the sampler, the sampler in the melt; figure 4 is the same, the sampler with a sample in the lance when it is extracted.

A device for sampling liquid melts contains a sampler 1, 20

made of two semi-cylinders with a length of, for example, .160-200 mm, a removable end cap 2 and a hollow rod 3, which serves to couple the sampler 1 with the tuyere. All parts of the device have a total outer diameter of 25 mm and are made of stainless steel. For fastening both semi-cylinders to each other, serve the end cover 2 and the hollow rod 3, equipped with a 5/8 inch internal thread, a. at the ends of the sampler 1 is made external thread of the same diameter. In the assembled state, the end cap 2 and the hollow rod 3 ensure reliable fastening of both semi-cylinders 1 to each other. To prevent melt from getting into threaded connections, the latter should not have a gap.

For ease of assembly and disassembly of parts of the device, the end cap 2, the sampler 1 and the hollow rod 3 have a turnkey recess (not shown) on the outer surface.

The sampler 1 has an internal 45 through hole 4 with a diameter of 813 mm, made along the horizontal axis of the sampler 1 and used to fill the sample being taken, and an inlet 5 with a diameter of 6-7 mm, located perpendicular to the axis of the sampler 1 and at a distance, for example, 0-20 mm from the end cap, 2.

The length of the hollow rod 3 should be eaten from the length of the lance cavity, the distance of the maximum hollow rod hollow into the melt and the length necessary for its free holding

sixteen

outside the converter, in the pilot sample the length of the hollow rod is 2100 mm.

The device works as follows.

The device is assembled as shown in FIG. 1 (initial position). Before sampling, the outer surface of the sampler. 1, except for the inlet 5, is coated with a solution of refractory clay to reduce the ingress of melt into the connecting thread.

For sampling, the sampler 1 is introduced into the cavity of the tuyere 6, while the ball valve 7 is pressed into the pocket 8 and part of the blast gas continues to flow into the melt along the gap between the tuyere cavity and the hollow rod, and the other part is brought out of the converter through the ball valve 7. The sampler advances the cavity of the tuyere to immerse it in the melt, while the melt through the inlet 5 fills the inner hole 4. The residence time of the sampler 1 in the melt is about 1 s. During this time, the metal part of the melt (metallic copper), which has a high thermal conductivity, begins to cool and form 1-3 cm thick thickening on the surface of the inner hole 4. When the sampler 1 passes back through the lance cavity 6, the slag is removed (blown out) by the blowing gas into the hollow rods 3. At the same time, the exhaust gases are discharged through the free end of the hollow rod 3 to the outside, and the slag and the copper partially trapped with it are deposited on the inner surface of the hollow rod gi 3. After removing the sampler 1 from the end tuyere Werther for rapid cooling sampler 1 is placed in water. After cooling, the end cap 2 and the hollow rod 3 are disconnected from the sampler 1, separated into two half-cylinders and the sample is removed. In this case, the analysis is suitable for that part of the sample, which is located between the inlet and the end entering the hollow rod, having the form of a hollow cylinder. The part of the sample that is in the muffled part [of the sampler is discarded, as it contains particles of slag. Leftovers

Samples are removed from the hollow rod by simple tapping.

After removal of the sample, both half-cylinders of the sampler 1 are connected using an end cap 2 and a hollow rod 3 and coated with refractory clay. The device is again usable.

The time required for sampling, cooling and removal of the sample from the sampler is 3-5 minutes. The presence of several samplers prepared for operation and installation of pneumatic mail between the converter compartment and the chemical laboratory of the personnel serving the converter will allow operational control over the process of copper “boiling”.

The rationale for the selected ratios is explained in the table.

Performing the sampler in compliance with the specified ratio of the diameter of its opening in the wall to its internal diameter and to the internal diameter of the hollow rod in the totality of signs creates during the sampling process and during its formation at the time of device removal the conditions for uniform distribution of the liquid phase of the sample along the internal cylindrical surface of the sampler and removal of any pieces of sludge before the sample solidifies, which ensures its uniformity.

Performing a sampler with a ratio of the diameter of the hole in the wall to its internal diameter less than 1: 1.1 (for example, 1: 1) reduces the representativeness of the sample, since it increases the likelihood of slag pieces larger than the internal through the inlet diameter of the sampler, which prevents their further removal from the sample with blast gas.

Performance of the sampler with sootI

wearing the diameter of the hole in the wall to its inner diameter larger than 1: 1.8 (for example, 1: 2.0) leads to a change in the shape and quality of the sample and, consequently, to a decrease in its representativeness, since the sample obtained does not look like hollow cylinder, and a semi-cylinder with a thickness of 4-6 mm, in which there are pieces of slag, i.e. blowing the slag does not occur.

18716 b

Performance of the sampler and the hollow

Rods with a ratio of the diameter of the hole in the sampler wall to the hollow rod inner diameter smaller than 1: 2.0 (for example, 1: 1.8) also lead to a decrease in the representativeness of the sample, since the slag particles remain in the sample due to a decrease in their removal from the hollow rod.

Performing a hollow rod with a diameter greater than the diameter of the hole in the wall of the sampler 3 times (for example, 3.2 times), leads to

15 the difficulties of taking a sample from a tuyere, the existing pressure, in the converter tuyere prevents the introduction of the entire device or its removal from the tuyere.

The coaxial connection of the sampler and the hollow rod, as well as their implementation with the proposed ratio of the diameter of the hole in the wall of the sampler to the internal diameter of the sampler and the internal diameter

25 hollow rod allows in this combination of signs hollow rod to perform the function of transporting (removing) pieces of slag from the sample formation zone (and only partially

30 copper melt). In the famous hollow rod performs the function of transporting the copper melt together with pieces of slag to the place of sample formation, i.e., to the sampler.

2 ^ The proposed set of features makes it possible to form a representative test even before it enters the hollow barbell. In addition, in the proposed device is hollow

The boom 40 serves as a gas exhaust pipe, and the need for a sampling pipe is also eliminated.

Claims (1)

The claims of the device for sampling liquid melts, including a cylindrical sampler with a hole in the wall at the plugged end, connected to a hollow rod to mate the sampler with a tuyere, characterized in that, in order to increase the representativeness of the sample and simplify the device, the cylindrical sampler is connected coaxially with the hollow rod and made with the ratio of the diameter of the hole in the wall to its internal diameter and to the internal diameter of the hollow rod as 1: (1.1-1.8): (2.0-3.0), respectively. 7 1488716 eight No payment order Diameter input holes mm Inner diameter of the sampler, mm Internal diameter of a hollow rod, mm • Ratio In “OD The ratio of f In «OD 0 ^y 6n. igan Discrepancy chemical analysis of nickel,% ^ vn.prob one (known costly) 21 95 21 1: 4.4 1 ϊϊ, 0 1.73 2 7 eight 14 1: 1,1 1: 2,0 0.15 3 7 eight 21 1: 1,1 1: 3.0 0.17 four 7 13 14 1: 1,8 1: 2,0 0.15 five 7 13 21 1: 1,8 1: 3.0 0.14 6 7 9 nineteen 1: 1,3 1: 2.7 0.17 7 7 7 14 1: 1,0 1: 2,0 1.42 eight 7 15 21 1: 2.1 1: 3.0 1, 64 9 7 13 13 1: 1.8. 1: 1,8 1 "47 ten 7 13 23 1: 1.8 _g 1: 3.2 - FIG. 2 1488716 fie. four