Lafarge

Maurice Paliard

Ellis Gartner

Jean-Marc Martin

Michel Gimenez

Benoit Valdelievre

Francis Cochet

Jacques Duputs

A process for reducing the carbon dioxide concentration of a carbon dioxide-containing gas which process includes, in a first stage, contacting the carbon dioxide-containing gas with a treating solution including an alkali metal carbonate and/or hydroxide and with a catalyst to promote the absorption of carbon dioxide to form a second solution including an alkali metal carbonate and bicarbonate and, in a second stage, contacting the second solution with a carbonatable silicate-containing material including an alkaline earth cation capable of forming an insoluble carbonate to produce silica and a solid carbonate including the cation and to regenerate a solution including alkali metal carbonate.

Process for removal of carbon dioxide from a gas stream

An equipment for precalcining any mineral materials whatsoever comprising a precalciner consisting of a combustion chamber communicating through a passage-way with a reaction chamber itself communicating via a duct with a separation cyclone, the reaction chamber being fed with smokes issuing from a firing furnace and three ducts feeding with hot air issuing from a cooler the combustion chamber, a voluted casing at the level of a burner and said duct, respectively, the equipment in particular permitting the manufacture of cement clinker while greatly minimizing the emission of nitrogen oxides.

Equipment for and method of precalcining any mineral materials whatsoever

A method of crushing brittle materials for obtaining a product of great fineness, wherein the raw material is fed to a roll mill providing a product containing agglomerates and carried into a disaggregator-separator, the fine particles being discharged and the coarse particles being recycled, the disaggregation rate being limited in the disaggregator and the invention being applicable to cement clinker and to various mineral substances.

Method and system for pounding brittle material

A system comprising a roll press for crushing and partially agglomerating a mineral material, a conveyor means arranged downstream of this press and associated with a distributor device and allowing to recycle one portion of the crushed and partially agglomerated material to the inlet of the press whereas the other portion of the material issuing from this distributor device feeds a second distributor device one outlet of which communicates with the conveyor means to thereby control the amount and density of the crushed and partially agglomerated material recycled to the feed of the press.

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Saint Heand, France

Maurice Paliard