Control method and device of blast furnace probe

Abstract

The invention relates to a control method and apparatus of a blast furnace sounding rod. The method includes the following steps that: whether torque values outputted by a frequency converter are smaller than a pre-set lower-limit value is judged in real time; if the torque values are smaller than the torque lower-limit value, the control mode of the frequency converter is switched to a torque control mode; and if the torque values are greater than or equal to the torque lower-limit value, the control mode of the frequency converter is switched to a speed closed loop mode. With the control method and the apparatus of the blast furnace sounding rod provided by the invention adopted, reverse motion of production of a blast furnace can be avoided, and the sounding rod can accurately detect the depth of a material surface.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a control method and device for a blast furnace probe. Background technique [0002] As one of the key equipment of the blast furnace smelting system, the probe is mainly used to detect the depth of the material surface in the blast furnace body and provide a basis for the distribution of blast furnace materials. Such as figure 1 As shown, the probe is mainly composed of a frequency converter, a probe motor, a reducer, a position transmitter, an electronic master, a drum, a wire rope, an iron chain and an iron lump; in practical applications, such as figure 2 As shown, the drum, steel wire rope, iron chain and iron lump are installed in a closed iron container, which communicates with the blast furnace body, and the frequency converter controls the probe motor to drive the iron lump to move up and down in the blast furnace body. [0003] At present, after a roun...

AI Technical Summary

Problems solved by technology

[0004] However, when the production of the blast furnace is not going smoothly, problems such as the collapse of the material surface in the blast furnace, the increase of the air flow and the bumping of iron lumps on the furnace wall are often encountered.

However, if the above-mentioned problems are encountered during the downward movement of the iron lump with the material surface, the upward force on the iron lump will be weakened, and the upper and lower forces on the iron lump will be unbalanced, so that the iron lump will accelerate downward in the blast furnace body.

Affected by inertia, iron lumps are likely to rush into the material surface, but cannot normally move downward with the material surface, so that the probe cannot accurately detect the depth of the material surface

Images