Nippon Kokan Kabushiki Kaisha

Shuji Kajikawa

Haruo Ito

Kenji Ohkoshi

Yasuto Takasaki

Kazuo Kanai

Keitaro Hirai

Akichika Ozeki

Haruo Itoh

Yoshinobu Yanagida

Koji Satomi

Jirou Konishi

Shinichi Kurosawa

Toshio Mochizuki

Tetsuo Izawa

Masaaki Yasunaga

Yuichi Tsukada

Jiro Konishi

Koichiro Nakano

Yoshihisa Hirata

An improved apparatus for manufacturing a rapidly cooled solidified slag, the improvement relating to the use of pairs of weirs having an annular shape and a hollow portion therein; each of said pair of weirs being fixed to each edge of the peripheral surface of one of a pair of cooling drums so as to form a circular flange at right angles to the axial line of the one cooling drum around the entire circumference thereof.

Apparatus for manufacturing rapidly cooled solidified slag

An apparatus for manufacturing a rapidly cooled solidified slag, which comprises: at least one rotating cooling drum rotating around a horizontal center axis thereof, said cooling drum being cooled by a cooling medium, and having an outer peripheral surface comprising a plurality of jogs over the entire surface thereof; a slag sump arranged at a position where said peripheral surface of said cooling drum begins to rise, the depositing molten slag onto said peripheral surface of said cooling drum; a scraper proved at the lower part of said peripheral surface of said cooling drum; and a slag feeding means arranged above said cooling drum, for pouring said molten slag into said slag sump; whereby said molten slag poured into said slag sump is deposited onto said peripheral surface of said cooling drum, rapidly cooled through heat exchange with said cooling medium along with rotation of said cooling drum to become a solidified slag, and peeled off from said peripheral surface of said cooling drum by said scraper.

Apparatus for manufacturing a rapidly cooled solidified gas having

An apparatus for manufacturing a vitreous slag, which comprises: a pair of cooling drums, the peripheral surfaces of said pair of cooling drums being in contact with each other, and said pair of cooling drums rotating in directions opposite to each other at the same peripheral speed; a pair of weirs provided at the upper halves of the both ends of said pair of cooling drums so as to be in contact with said both ends of said pair of cooling drums, a slag sump being formed by means of said pair of weirs and the bodies of said pair of cooling drums, and molten slag being poured into said slag sump; a cooling medium for cooling said pair of cooling drums, said cooling medium comprising a high boiling point heat medium having a boiling point under 1 atmospheric pressure of at least 200.degree. C., said high boiling point heat medium being fed into each of said pair of cooling drums, exchanging heat with said molten slag in said slag sump, deposited onto the peripheral surfaces of said pair of cooling drums, and being discharged from each of said pair of cooling drums under a pressure of up to 5 kg/cm.sup.2 for heat recovery, whereby said molten slag is substantially completely converted into a vitreous slag through heat exchange with said high boiling point heat medium, and is peeled off from the peripheral surfaces of said pair of cooling drums by a scraper.

Apparatus for manufacturing vitreous slag

The present invention is concerned with a novel furnace top charging apparatus, especially of the bell-less type, having a rotating distribution chute, wherein there is provided a portal truck serving as a stand on a floor under chuting bunkers, which normally supports collecting chutes, and moves them when requested. The collecting chutes have a mouth for mounting a vertical chute at an upper portion between pivots of two swingable sealing valves. These members enable efficient preservation, checking inspection or repair of the collecting chutes, the vertical chute and the rotating chute.

Furnace top charging apparatus

For the purpose of utilizing as a sinter raw material a rolling mill sludge with a grease deposit having a high moisture content, which is deposited in a waste water pit of a steel rolling mill, the moisture content of said rolling mill sludge is reduced to from about 1% to 10% by drying said rolling mill sludge at a temperature of from about 120.degree. C to about 200.degree. C, preferably of about 140.degree. C to about 150.degree. C, with the use of the waste heat of a sinter cooler of a sintering machine, or by mixing said rolling mill sludge with a mill scale of a low moisture content collected without the use of roll cooling water; and then, said rolling mill sludge, the moisture content of which has thus been reduced, is continuously fed, by cutting into substantially equal batches, to at least one of a sinter discharge section, an entry section of said sinter cooler, belt-conveyor for fines return provided adjacent to a hot screen, and a return hopper of said sintering machine; whereby said grease deposit is substantially completely removed through combustion or evaporation with the use of the heat of the sinter produced by said sintering machine.

Method for removing water and grease deposit from rolling mill sludge

Growing community of inventors

Fukuyama, Japan

Shuji Kajikawa