Method for producing marl slags

Details Method for producing marl slags Method for producing marl slags

C - Chemistry, Metallurgy

04

B

C04B 7/14 (2006.01) C04B 7/00 (2006.01) C04B 7/36 (2006.01) C04B 7/38 (2006.01) C04B 7/40 (2006.01) C04B 7/43 (2006.01) C04B 7/44 (2006.01) C04B 7/45 (2006.01)

Patent

CA 2361933

The invention relates to a method for producing marl slags and marl slag cements or mixed constituents for mixed cements made of marl with a basicity CaO/SiO2 of < 2Ø According to the invention, the argillaceous marl or a mixture consisting of marl and clay with a basicity of < 2.0 is, in a first method step, dried, preheated and calcined. In a second step, the resulting product is subsequently melted in a separate smelting furnace at temperatures higher than those used in the first method step, and the melt is then granulated.

L'invention concerne un procédé permettant de produire des boues marnières et des ciments de boues marnières ou des constituants mixtes pour ciments mixtes à base de marne, d'une basicité CaO/SiO¿2? < 2,0. Selon ce procédé, il est prévu dans une première étape, de sécher de la marne argileuse ou un mélange de marne et d'argile de basicité < 2,0, de la(le) préchauffer et de la(le) calciner. Dans une seconde étape, le produit obtenu est fondu dans un four de fusion séparé à des températures plus élevées que dans la première étape. La matière fondue est ensuite granulée.

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