Ishikawajima-harima Jukogyo Kabushiki Kaisha

Chichibu Cement Kabushiki Kaisha

Kabushiki Kaisha

Chichibu Engineering Kabushiki Kaisha

Hiroshi Teshigawara

Toshikazu Ichiyanagi

Shoji Sekine

Zenzaburo Kawai

Kanzaburo Sudo

Satoru Higuchi

Masaharu Kikuchi

Yasuo Komatsu

Hiroshi Yokomizo

Tamotsu Negishi

Kanzaburo Suto

Upper and lower vortex chambers are disposed immediately below a calcining furnace for calcining powdery raw materials. The scattering clinker particles from a fluidized-bed burning furnace are trapped in the lower vortex chamber and are returned to the fluidized-bed burning furnace so that the scattering clinker particles are positively prevented from flowing into the upper vortex chamber and the calcining furnace.

Calcination apparatus for use in fluidized-bed burning installation for

According to the present invention, white cement clinker particles are not burned in a rotary kiln and the burned clinker particles are not immersed in the water to be cooled. White cement clinker raw materials are burned in a fluidized bed burning furnace with a fluid bed or a spouted bed and the clinker particles thus burned are reduced with a reducing gas. The clinker particles thus reduced are first cooled with the water which is sprayed over the clinker particles and then further cooled with the air. The white cement clinker raw material particles fed into the fluidized bed burning furnace are burned into clinker particles while forming a fluidized bed and then the clinker particles thus burned drop through a jet injection pipe into a reduction chamber disposed below the burning furnace and are reduced. The clinker particles thus reduced are rapidly cooled to 600.degree.-700.degree. C. with the sprayed water while being isolated from the surrounding atmosphere in a primary cooling chamber and the clinker particles thus cooled are further cooled in a secondary cooling chamber with the air to 100.degree.-150.degree. C.

Method for producing white cement clinker

Method and apparatus for producing white cement clinker

Growing community of inventors

Koshigaya, Japan

Hiroshi Teshigawara