SU1211301A1 - Probe for measuring parameters of molten metal - Google Patents

Description

The invention relates to ferrous metallurgy and is intended for testing mainly in large-scale converters when measuring the parameters of the metal during the converter smelting process.

The purpose of the invention is to destroy the efficiency of production of steel by increasing the quality of metal parameters and probe durability.

The schematic drawing shows the proposed probe, longitudinal section.

The probe consists of coaxially arranged pipes 1, 2, 3 and 3, 4 respectively, forming a water-cooled jacket 5 between them, and a central tube 6 for outputting wires from a sensor (not shown) installed in the socket 7 of the head 8 connected to the lower end of the pipe 3, the upper end of pipes 1 and 2 are hermetically sealed by a bottom 9 with a hole for the upper end of the tube 6 to pass through, the lower end of which is connected to the head 8. The coolant is brought in and retracted to the probe via pipes 10 and 11, respectively. Pipes I and 2 are connected respectively to pipes 3 and 4 conical inserts 12,

The probe is made up of sections A and B with different sections D, - and D, tubes 1,3 and As and D tubes 3,4 and shorter towards the head 8, the ratio of the diameters of tubes of adjacent sections A and B as 1 :( O, 5–0.6), taking into account the conditions for providing the necessary rigidity and at the same time reducing the heat load acting on section B, which is in the measurement of the parameters of the liquid metal in the working space of the converter.

At one of the converters (volume 300 tons), when measuring the parameters of the liquid metal, comparative tests were carried out on known probes with a constant cross section of pipes along the length and the proposed probes consisting of two sections with different sections of external and internal pipes, respectively. The maximum diameter of the outer tube for all probes was 170 mm, and the length of each probe was 20 m,

The results of studies of the effect of different ratios of pipe diameters on the technical condition of the probes tested are given in Table 1.

As a result of the above studies, it was established that the most satisfactory indicators in the work are probes, in which

ratios of pipe diameters (D,: D and Dg: D (,) of sections A and B are in the range of 1: (O, 5-0.6). This ratio also found that in addition to reducing the heat load on

section B in the process of measuring the parameters of the liquid metal, and the flow rate of the cooler (water) is reduced by about 50% compared to its consumption for probes with a constant cross section

pipe length.

The ratio of the lengths L and Lj of sections A and B as 1: (O, 5-0.7) is chosen from the condition of the probe location when measuring the parameters of the liquid metal relative to the cavity of the converter and the zone of the converter box.

The results of studies of the influence of the ratios length, L and L of adjacent areas A and B with different sections

 The technical condition of the probes being tested is given in Table 2.

thirty

As a result of the above studies, it was established that the most satisfactory indicators in the work have probes, in which the ratio of the lengths of adjacent sections (A and B) with different pipe sections is in the range of 1: (O, 5-0.7),

The insert I2 is tapered to reduce the hydraulic resistance during the circulation of the cooler in the water-cooled jacket 5.

The probe works as follows

Before monitoring the parameters of the liquid metal, a sensor is installed in the socket 7 of the head 8, a cooler (water) is fed through the nozzle 10 into the water-cooled jacket 5 of the probe, which is discharged through the nozzle 1I, after which the probe is inserted into the converter bath. After measuring the parameters of the liquid metal, the probe is removed and the converter,

The use of the proposed probe by improving its durability contributes to the improvement of the technological process in the smelting of steel in the converter, improves the organization of labor

by reducing the slagging and squeezing the surface of the probe tubes and reducing the flow rate of the cooler.

Satisfactory

No fly

Satisfied

Same ||

probe with sootl: L

Satisfied, successful

Proposed probe 1:04

Unsatisfactory

.Table 1

180-200

50

Intensive slagging and nasti formation

Curvature of the lower portion (B} of the probe

60

70 90 software

Secondary slagging and sweeping of section B

T a 6 l and c a 2

Intensive slagging and nasheobrazovanie. ISO-ZOO water consumption m / h

The curvature of the lower portion B probe /

Satisfactory

Also

t

Continuation of table 2

Water consumption 60

Increased delamination and buildup at the top of section B

Jn / raiume / ib

VNISHI Order 612/32 Circulation 552 Subscription Branch of PPP Patent, Uzhgorod, ul, Proektna, 4

Claims (2)

1. A PROBE FOR MEASURING LIQUID METAL PARAMETERS, containing coaxially arranged pipes forming a water-cooled jacket, a tube for outputting sensor wires, a head with a sensor, nozzles for supplying and discharging a cooling agent, with the exception that , in order to increase the efficiency of steel production by improving the quality of measurements of metal parameters and the resistance of the probe, the probe tubes, both internal and external, forming a water jacket, are made in length from two sections with different sections, with a smaller goal application, the ratio of pipe diameter portions is 1: (0, 5-0,6), and the ratio of the lengths of these portions is 1: (0.5-0.7 /. 2. The probe according to claim 1, wherein the pipe sections are connected to each other by a conical insert. 1,121