Shinagawa Refractories Co., Ltd.

Shingo Nonaka

Masashi Mori

Masumi Toda

Kenji Ichikawa

Takashi Yamamura

Hiroshi Kyoden

Eiichi Yorita

Yoshihisa Hamazaki

Seiji Nagai

Kazuo Kawano

Yukio Ozaki

Apparatus for observing the interior of a hot furnace

An apparatus for mixing and pumping slurry which is mixed with a refractory aggregate material in a gunning nozzle, characterized in that the apparatus is provided at its upper portion with a slurry mixing apparatus and its lower portion with a pumping apparatus which feeds the slurry under pressure by pump. The mixing apparatus includes an opening at the bottom thereof for the downward discharge of the slurry from the mixing apparatus. The pumping apparatus includes an opening at the top thereof positioned directly below the discharge opening of the mixing apparatus for delivering the slurry to the pump, thereby allowing the regulation and pumping of the slurry to be carried out simultaneously. The slurry is pumped to a gunning nozzle for admixture in a predetermined ratio with refractory aggregate.

Apparatus for mixing and pumping slurry

A nozzle for the gunning of monolithic refractories, being provided with a liquid adding mechanism (6), characterized in that an air or air-liquid mix feeding portion (4) having an inlet (4a) and a tube protecting pipe (3) are arranged in order following the liquid adding mechanism (6), a flange portion (1a) of a flexible inner layer tube (1) is anchored on the liquid adding mechanism side of said feeding portion (4) while another flange portion (2a) of a flexible outer layer tube (2) is anchored on the side of an outlet (10) of the feeding portion (4) thereby to insert the inner layer tube (1) into the outer layer tube (2), and an annular dead space (11) communicating with the inlet (4a) is formed between the inner layer flange portion (1a) and said outer flange portion (2a).

Nozzle for the gunning of monolithic refractories

A low cement refractory gun mix is disclosed. The gun mix comprises a coarse refractory portion having a particle diameter of at least 74 microns and a fine powder portion having a particle diameter of at most 74 microns. The gun mix is prepared by forming the fine powder portion into a slurry and deflocculating it prior to mixing it with the coarse refractory portion rather than deflocculating it when it is introduced into a spray gun. The gun mix has an extremely low cement and water content. Accordingly, a sprayed deposit of high packing density can be obtained which is equal in quality with deposits produced by vibration molding or casting. The gun mix is appropriate for use in forming the entire work lining of containers for molten metal.

Refractory gun mix

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Okayama, Japan

Shingo Nonaka