Oxygen Measurement For Molten Steel

1.3.1 Application: Used for primary melting furnace,LF and RH furnaces, oxygen probes measure oxygen activity of the molten steel in the treating process, which can guarantee the deoxidizer addition, shorten the refining time, help develop new varieties, improve technology, and promote steel purity.

1.3.2 Main features and range of application: Oxygen probe has two types: high oxygen probe and low oxygen probe. The former is used to measure the temperature and high oxygen content of molten steel in converter, electric furnace, refining furnace. The later is used to measure the temperature and low oxygen content of molten steel in LF, RH, DH, tundish, etc. and also quickly measure acid soluble aluminum.

1.3.3 Principle: "Solid dielectric concentration cell oxygen-content test technology" is applied in oxygen probe, which allows to measure the temperature and oxygen content of molten steel at the same time. Oxygen probe consists of half-cell and thermocouple. Solid dielectric concentration cell oxygen-content test is composed of two half-cells. wherein one is known reference cell of known oxygen partial pressure, and the other is the molten steel. The two half-cells are connected by oxygen ions solid electrolyte, forming an oxygen concentration cell. Oxygen content can be calculated from the measured oxygen potential and temperature of the molten steel.

1.3.4 Features: 1) The oxygen activity of the molten steel can be measured directly and rapidly, which is helpful to determine the amount of the deoxidizing agent, and improve the operation of the deoxidation.

2) The oxygen probe is easy to operate. Measurement results can be obtained just 5-10s after inserting it into the molten steel.

1.3.5 Main technical indexes:

1) High oxygen probe

Working condition: 1400℃-1760℃

Measuring range: 50ppm~1000ppm

Measurement resolution: 0.1mv

Measurement accuracy: 0~5mv

Oxygen potential: -300mv~+300mv

Response time: 8s-10s

Measurement efficiency: 98%; measurement efficiency is usually above 98%, but it is related to operations of the workers; if misused, measurement efficiency will be reduced.

Note: If oxygen activity in molten steel is above 50ppm, high oxygen probe is suggested.

2) Low oxygen probe

Working condition: 1500℃-1760℃

Measuring range: 1ppm~1000ppm

Measurement resolution: 0.1mv

Measurement accuracy: 0~3mv

Oxygen potential: -300mv~+300mv

Response time: 8s-10s

Measurement efficiency: 98%; measurement efficiency is usually above 98%, but it is related to operations of the workers; if misused, measurement efficiency will be reduced.

Note: If oxygen activity in molten steel is between 1ppm and 50ppm, low oxygen probe is suggested.

3) Ultralow oxygen probe

Working condition: 1500℃-1760℃

Measuring range: 1ppm~1000ppm

Measurement resolution: 0.1mv

Measurement accuracy: 0~1mv

Oxygen potential: -300mv~+300mv

Response time: 8s-10s

Measurement efficiency: 98%; measurement efficiency is usually above 98%, but it is related to operations of the workers; if misused, measurement efficiency will be reduced.

Note: If oxygen activity in molten steel is between 1ppm and 5ppm, low oxygen probe is suggested. If oxygen activity is between 1ppm and 5ppm, ultra low oxygen probe is more accurate than low oxygen probe.

1.3.6 Ordering information:

1) Please specify a model;

2) Length of paper tube is 1.2m, which can also be customized according to user needs;

3) Length of lances are 3m, 3.5m, 4m, 4.5m, 5m, 5.5m, which match with user’s need.