Sumitomo Metal Industries, Inc.

Sumitomo Heavy Industries, Ltd.

Takashi Okazaki

Masakazu Koide

Takashi Asari

Tohru Matsuo

Kantaro Sasaki

Yutaka Hirata

Yasutake Ohhashi

Takami Ikeda

Tsutomu Takamoto

Masahiro Yoshihara

Hisao Nishimura

An endless track continuous casting machine having a pair of upper and lower endless belts facing each other in a spaced apart relationship and travelling in a downwardly slanted direction which form the long side walls of a mold. Dam blocks continuously and closely disposed and pinched between both side edges of the pair of endless belts and each supported by a link forming part of an endless chain wound around sprockets disposed on each side of the pair of endless belts form the short side walls of the mold. The dam blocks are mounted on each of the links of the endless chain to be movable inwardly and outwardly, and they are guided by a guiding mechanism to a projecting position when entering the advancing path of the mold and are guided to a set back position when entering the returning route. This guiding mechanism is adjustable to change the projected position of each dam block while the endless chain is moving, thus enabling the width of a cast piece to be altered without stopping the casting work.

Endless track continuous casting machine

Herein disclosed is a loop type continuous metal casting machine in which two side dams are revolved in a loop passing along a casting zone from the entrance end thereof between upper and lower endless revolving casting belts to define a downhill moving mold and in which each of the side dams is formed of a multiplicity of metal dam blocks so strung onto a flexible metal strap loop that the metal dam blocks abut in end-to-end relationship against one another but are allowed to slide on and relative to the metal strap loop. Push means is disposed near the entrance end of the casting zone and is reciprocated back and forth in synchronism with the passage of each side dam for periodically entering the wedge-shaped gap, which is formed between the adjacent two of the metal damblocks of the corresponding side dam loop before entry into the casting zone, to push the preceding one of the adjacent two forward thereby to tightly press the preceding damblocks together so that the end-to-end abutting relationships of the damblocks may be ensured while the side dam loops are passing through the casting zone. Thus, molten metal can be continuously cast in the moving mold without burrs.

Loop type continuous metal casting machine

A process for continuously casting thin slabs, which comprises the steps of pouring a molten metal from a large-sized tundish through a sliding nozzle into a small-sized tundish, over-flowing the molten metal from the small-sized tundish to pour the molten metal into a continuous casting machine of the twin-belt type is disclosed. According to the process, a pouring rate into the small-sized tundish is calculated prior to overflow on the basis of a change in weight of the small-sized tundish and the degree of opening of the sliding nozzle is adjusted so as to make the calculated pouring rate come close to the target pouring rate into the small-sized tundish or into the casting machine.

Continuous casting of thin slabs

A process for dephosphorizing molten pig iron by adding (a) lime, converter slag and/or iron oxide, (b) iron oxide and/or oxidizing gas, and if necessary (c) flourspar and/or soda ash to the molten pig iron stored in a treating vessel in order to adjust the amount of % CaO to correspond to 0.3 to 3.0 times the sum of the amounts of % SiO.sub.2 and % P.sub.2 O.sub.5 and to adjust the amount of total iron to 15 to 50%, in the slag composition after treatment, thereby obtaining a high dephosphorization.

Process for dephosphorizing molten pig iron

Growing community of inventors

Ibaragi, Japan

Takashi Okazaki