Posco

Geon Shin

Jong-Soo Park

Ju-Seung Lee

Ki-Jang Oh

Tae-Jong Ha

Chang-Hyun Park

Sang-Woo Choi

Shin-Hwan Kang

Ho-Moon Bae

Un-Kwan Cho

Baek Lee

Ji-Un Oh

Duk-Man Lee

An aspect of the present disclosure may provide a defect detection apparatus and method for a steel plate, in which a defect in a steel plate may be detected, and particularly, only an inner defect in the steel plate may be detected, even with a relatively low amplification rate.

Apparatus and method of detecting defect of steel plate

Provided are a fixed-type electric furnace enabling continuous operation which allows melting without the interruption of power supply and tapping in a fixed state, and a fixed-type electric furnace and a molten steel production method using same. The fixed-type electric furnace comprises: a preheating furnace which is disposed on the side of a melting furnace and preheats an iron source (scrap) using exhaust gas from the melting furnace; a supply means for supplying the iron source, which has been preheated in the preheating furnace, to the melting furnace; the melting furnace comprising electrodes for melting the preheated iron source; and a fixed-type discharge means for discharging molten steel which has been melted in the melting furnace, wherein the preheating furnace is integrally connected to the melting furnace.

Fixed-type electric furnace and molten steel production method

Growing community of inventors

Pohang-si, South Korea

Geon Shin