Nippon Kokan Kabushiki Kaisha

Seiji Matsui

Michio Nakayama

Hideyuki Yoshikoshi

Osamu Tajima

Tsuneo Miyashita

Hiroshi Fukuyo

Noboru Sakamoto

Kazuharu Yatsunami

In a method of producing unbaked agglomerates, green pellets or briquettes are produced by adding 5 to 30% of reduced iron powder, mill scale powder or iron sand and also adding a binder consisting of a cement or granulated blast furnace slag and then the green pellets or briquettes are dry cured thereby producing agglomerates having excellent reducing performance.

Method of producing unbaked agglomerates

A treating furnace for manufacturing non-fired iron-bearing pellets comprising a green iron-bearing pellet inlet at one end thereof and a non-fired iron-bearing pellet outlet at the other end. Green iron-bearing pellets are continuously fed into the treating furnace through said inlet and after being heated are discharged through said outlet. The treating furnace contains at least one heating gas blowing port for blowing heating gas into the furnace and at least one heating gas discharge port for discharging said gas after it has heated the pellets. The furnace also contains a preheating zone and at least one preheating gas blowing port and at least one preheating gas discharge port to pass preheating gas through said preheating zone. The heating gas discharged from the heating gas discharge port is used as the preheating gas. The gas discharged from the heating gas discharge port is admixed with the gas discharged from the preheating gas discharge port and then the thus mixed gas is utilized as the feed preheating gas to the preheating gas blowing (inlet) port.

Method and apparatus for manufacturing non-fired iron-bearing pellet

A method and an apparatus for continuously manufacturing a non-sintered pellet, which comprises:

Method and apparatus for continuously manufacturing non-sintered pellet

A method and an apparatus for manufacturing a non-fired iron-bearing pellet, which comprise: supplying a green iron-bearing pellet containing a hydraulic binder and water into a treating furnace provided with a green iron-bearing pellet inlet at an end thereof and a non-fired iron-bearing pellet outlet at the other end thereof and having at least one heating gas blowing port and at least one heating gas discharge port, blowing through said blowing port into said treating furnace a gas containing a saturated steam at a temperature substantially equal to the heating target temperature of the green pellets, replenishing the heat of said gas lost through heat exchange with said green pellet with the condensation heat produced from condensation of at least part of the steam contained in said gas through heat exchange with said green pellets, and holding said green pellets at said target temperature for a prescribed period of time to harden said green pellets, thereby continuously manufacturing a non-fired iron-bearing pellets. The green iron-bearing pellets introduced into the furnace are first pretreated by contact with the gas which had been used to heat the already preheated pellets.

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Kawasaki, Japan

Seiji Matsui