Abstract: A device for the selective granulometric separation of solid powdery materials using centrifugal action, capable of separating materials into a fine material fraction and a coarse material fraction, includes: a housing, a cylindrical rotor rotatable, relative to the housing, about a vertical axis inside the housing and provided with blades evenly distributed on the periphery of an upper outlet opening through which a stream of gas, laden with particles having a size lower than a predetermined particle size, is drawn, a set of vertical adjustable vanes evenly distributed about the rotor along the generatrices of a virtual cylinder and directing the gas stream towards the rotor, elements for feeding the particles between the vanes and the rotor, collecting unit lower than the rotor for collecting the unfed particles having fallen and having a size larger than the predetermined particle size.

Abstract: Method for cooling granular solid materials from a continuous curing facility having at least one area for burning a fuel to cure granular materials, wherein the curing of the granular materials, then the cooling of the cured granular materials is carried out in two consecutive steps, a first cooling step in a first cooler and a second cooling step in a second cooler, the method including: providing a cold air source for cooling the granular materials, the cold air source directly supplying air to the second cooler by blowing, and the air heated by the cured granular materials being used during the cooling as combustion gas for the burning area. All gases generated by the first and second coolers are routed to the burning area for use as a combustion gas, and the amount of cold air blown to the second cooler is adjusted to cover the air combustion needs.

Abstract: A method for manufacturing a cement clinker includes a rotary furnace, a cyclone preheater receiving the fumes from said rotary furnace, an air blowing clinker cooler, and at least one heat exchanger, referred to as a first heat exchanger. The raw materials are preheated and decarbonated in said cyclone preheater. The clinker is cooled in said clinker cooler. A first portion of the hot air generated by said clinker cooler, or so-called secondary air, is directed to the rotary furnace to be used as combustion air. A second portion of the hot air generated, or so-called tertiary air, is directed and carried separately from the first portion to a place in the facility where fuel is burned. A third portion of hot air generated in said clinker cooler, or so-called excess air, is carried into at least said first heat exchanger for the purpose of recovering power to produce electricity.

Abstract: The invention relates to a process for manufacturing cement clinker in a plant having a cyclone preheater, a precalcination reactor, a rotary furnace and a clinker cooler. In the process, the flue gases from the furnace are conducted to the precalcination reactor, or even to the cyclone preheater. According to the invention, the precalcination reactor is fed with an oxygen-rich gas, the nitrogen content of which is less than 30%, constituting the sole oxygen source for said reactor, and a portion leaving the cyclone preheater is recycled into the plant so as to obtain a suitable flux necessary for suspending matter in said preheater, while the other portion, rich in carbon dioxide, is adapted for the purpose of a treatment for limiting the amount of carbon dioxide discharged into the atmosphere, such as particularly sequestration.

Abstract: The invention relates to a process for manufacturing cement clinker in a plant having a cyclone preheater, a precalcination reactor, a rotary furnace and a clinker cooler. According to the invention, the flue gases produced by the rotary furnace are separated from the gases from the preheater so as not to mix them, the precalcination reactor is fed with an oxygen-rich gas and a portion of the gases leaving the cyclone preheater is recycled into said precalcination reactor, or even into the preheater so as to obtain a flux suitable for suspending matter in the preheater. The non-recycled other portion of the gases, rich in carbon dioxide, is adapted for the purpose of limiting the amount of CO2 discharged, by means such as sequestration means.

Abstract: A method for manufacturing a cement clinker includes a rotary furnace, a cyclone preheater receiving the fumes from said rotary furnace, an air blowing clinker cooler, and at least one heat exchanger, referred to as a first heat exchanger. The raw materials are preheated and decarbonated in said cyclone preheater. The clinker is cooled in said clinker cooler. A first portion of the hot air generated by said clinker cooler, or so-called secondary air, is directed to the rotary furnace to be used as combustion air. A second portion of the hot air generated, or so-called tertiary air, is directed and carried separately from the first portion to a place in the facility where fuel is burned. A third portion of hot air generated in said clinker cooler, or so-called excess air, is carried into at least said first heat exchanger for the purpose of recovering power to produce electricity.