Mitsui Engineering and Shipbuilding Company Limited

Mitsubishi Electric Corporation

Hitoshi Koyama

Kazuo Abe

Kazuyoshi Matsuo

Takao Suzuki

Shinichiro Saito

Toshio Yamaki

Unburned carbon is efficiently separated according to the properties of fly ash. An apparatus is provided which comprises: a slurry preparation tank () in which water (c) is added to fly ash (a) to produce a slurry (d); a scavenger addition device () for adding a scavenger (e) to the slurry (d); a vertical surface-modification device () in which the slurry after addition of the scavenger is stirred at a high speed to impart shear force thereto and thereby cause the scavenger (e) to adhere to the surface of unburned carbon (b) contained in the slurry; a regulating tank () in which a blowing agent (f) is added to the slurry (d') which has undergone surface modification with the surface modification device; and a flotation machine () with which the unburned carbon (b) is floated together with bubbles (n) and separated from the slurry containing the blowing agent.

Apparatus for removing unburned carbon in fly ash

The object is to remove unburned carbon in a fly ash in a stable and economically advantageous manner. A fly ash, water and a trapping agent are mixed together in a hybrid mixer (), a shearing force is applied to the mixture to prepare a slurry containing surface-modified unburned carbon within a short time, a foaming agent is added to the slurry, and then the unburned carbon is separated by performing flotation separation in a flotator ().

Method for removal of unburned carbon in fly ash

Disclosed is a method for removing unburned carbon from fly ash at low cost and within a short time. The method comprises the steps of adding a collecting agent to fly ash directly, agitating/mixing the mixture in a mixer (), adding water to the resulting mixed material in a mixing vessel () to yield a slurry, applying a shearing force to the slurry in a submerged stirrer (), and performing flotation separation of unburned carbon in a flotator ().

Method for removal of unburned carbon from fly ash

A display apparatus includes a substrate including a display area of an approximate rectangle, and at least one film pattern which is formed over the substrate and extends to outside of the display area. A perimeter of the at least one film pattern has a shape of a smooth curved line at vicinity of at least one of corner portions of the display area.

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Tokyo, Japan

Hitoshi Koyama