CS210131B1 - Probe for dynamic system of the control of the closed cycle steel works processes - Google Patents

Description

(54) Probe for dynamic closed-loop steel process control system i

The present invention relates to a multipurpose probe for a dynamic closed-cycle steel process control system which enables an immediate evaluation of three components in liquid metal.

The speed and accuracy of the determination of the factors determining the quality of the steel has a decisive influence on the application of steel process automation elements. The current method of evaluation is very slow, and so for example with the oxygen converter - KKO the determination of the necessary data is based on indirect methods such as measuring decarburization rate from analysis and flue gas, converter noise level, flame luminance and sampling that do not give satisfactory results and prolong time. Similar problems exist practically in other metallurgical furnaces.

The only way to capture the continuously decreasing melting time is to control it according to the dynamic model and use the existing known method as feedback.

For this purpose, the probe according to the invention is characterized in that the probe consists of a temperature-protected support tube, equipped with a side inlet opening, through a deoxidizer into an expansion chamber arranged in the ingot mold and connected flow rates to the solid sample space. on the other hand, the evaluation chamber for cooling the metal through which the sensor of the cooling temperature sensor passes, in which the head of the mold is located the head of the sensor of the melt temperature sensor, provided with a cap and the opposite end of the mold is provided with protection of the connector outlet.

The probe according to the invention fulfills the main condition - reliable multipurpose, which in conjunction with a computer ensures the possibility of making corrections during the melting process. For example, in the aforementioned oxygen converter, the decisive factor is the optimum ratio of carbon, blown oxygen and melt temperature, and only an immediate knowledge of these variables at a given melting stage will enable the quality and economic control of the entire production process. An advantage of the probe according to the invention is the instantaneous determination of the 7 * carbon content and the bath temperature with immediate sampling of two solid samples for analysis on a quantometer. The output for instantaneous determination of% carbon and temperature can be made on a line speed recorder or digitally - with simultaneous computer evaluation.

An exemplary embodiment of a probe according to the invention is shown in longitudinal axial section of the attached drawing.

In the tube 10 provided with thermal protection 15 there is a ceramic ingot 6 with a metal cap 7 which protects the sensor 8 of the melt temperature sensor against damage caused by passing through the slag. The lateral inlet opening 2 opens into the expansion chamber 3, from where the flows lead to the solid sample chamber 1 and to the evaluation chamber 4 for cooling the metal, i.e. to evaluate the% carbon. Also located in this part is a displaceable sensor 5 of the temperature sensor. The sensor of the melt temperature sensor is located in the head 9 with the contact part and is connected to the contact part of the cable 11. The ceramic mold 11 is protected by a paper tube 12 connected to the protection of the connector 13 output. A metal insert 14 is preferably provided in the metal cooling evaluation chamber 4, and the expansion chamber 3 has a deoxidizer 16. The side inlet opening 2 is provided with a disc cover 17.

Upon insertion of the probe into the melt using a water-cooled auxiliary tube or an aliquot hand device, the metal cap 7 melts and the melt begins to act on the sensor 8 of the melt temperature sensor. At the same time, the disc cover 17 of the side inlet opening 2 melts and the melt starts to penetrate through the deoxidizer 16 into the expansion chamber 3, from there at the same time into the space for a solid sample.

Claims (1)

P R E D Μ E T Probe for a dynamic closed-loop steel process control system, characterized in that it consists of a support tube (10) with temperature protection (15), provided with a side inlet (2), which opens through a desoxide (16), into the expansion chamber (3). (16), and the associated flow rates, on the one hand, to the solid (1) space for the solid sample and the rec and evaluation chambers (4), where it cools. The sensor 5 of the temperature sensor transmits the entire cooling process to the evaluation devices - computer, where the temperature values obtained by the external sensor from the melt are also compared. The probes can be advantageously used in particular in the automatic control of steel processes, for example in the dynamic control system of oxygen converters, in foundries, in tandem furnaces, electric arc furnaces, Martin furnaces, etc. SUMMARY OF THE INVENTION Firstly, a cooling chamber (4) of the metal temperature sensor (5) passes through the cooling temperature sensor (5), wherein a head (9) of the sensor (8) of the melt temperature sensor provided with a cover (7) and the end of the ingot (6) is provided with a connector outlet protection (13).