The present disclosure provides a cement sintering device and a cement sintering method. The cement sintering device comprises an emitting module configured to emit laser to an irradiation area corresponding to the emitting module; a moving module configured to control the irradiation area of the emitting module to move so that the irradiation area covers a cement to be sintered and is moved along an extension direction of the cement; a detecting module configured to detect structural information about the cement covered by the irradiation area; and a control module configured to adjust operation parameters of the emitting module for emitting the laser based on the structural information. Based on the solution of the present disclosure, it is possible to achieve the effect of more accurately sintering.

A calcination unit able to decarbonate raw materials intended for clinker production, the unit including: a main duct in which the raw materials circulate according to a first movement direction, the raw materials being calcined in the main duct; a solid fuel supply duct opening onto the main duct via a fuel outlet, the solid fuel moving according to a second movement direction; a retaining device located in the main duct and arranged opposite the solid fuel outlet so that the solid fuel arriving in the main duct via the fuel outlet passes through the retaining device.

A calcination unit able to decarbonate raw materials intended for clinker production, the unit including: a main duct in which the raw materials circulate according to a first movement direction, the raw materials being calcined in the main duct; a solid fuel supply duct opening onto the main duct via a fuel outlet, the solid fuel moving according to a second movement direction; a retaining device located in the main duct and arranged opposite the solid fuel outlet so that the solid fuel arriving in the main duct via the fuel outlet passes through the retaining device.

The present disclosure provides a cement sintering device and a cement sintering method. The cement sintering device comprises an emitting module configured to emit laser to an irradiation area corresponding to the emitting module; a moving module configured to control the irradiation area of the emitting module to move so that the irradiation area covers a cement to be sintered and is moved along an extension direction of the cement; a detecting module configured to detect structural information about the cement covered by the irradiation area; and a control module configured to adjust operation parameters of the emitting module for emitting the laser based on the structural information. Based on the solution of the present disclosure, it is possible to achieve the effect of more accurately sintering.

The present invention relates to device for heat-treating solid material, in particular in granular form, wherein the device comprises a kiln and an external heat source, wherein said device comprises at least two steps arranged above each other, wherein each step comprises a gas permeable sloped sliding surface on which a bed of said solid material slides down within said device due to gravity and wherein said sloped sliding surfaces of said steps directly consecutive to each other slope in opposite directions, wherein the kiln comprises at least one, preferably at least two, of said steps and the kiln is configured such that a hot gas generated by the external heat source is led through said solid material inside the kiln to heat said solid material to a desired temperature in order to change the substance properties of said solid material. According to the invention, said device comprises at least one gas temperature adjustment system comprising a gas outlet in a second step of said steps, a temperature adjustment zone and a gas inlet in a first step of said steps, preferably the first step being arranged directly consecutive and above the second step, wherein at least the first step is one of said at least one step inside the kiln and wherein said gas temperature adjustment system is adapted such that hot gas is extracted from said second step through the gas outlet, directed into the temperature adjustment zone where a hot gas temperature is adjusted to an adjusted temperature by the external heat source and reintroduced into said first step at said adjusted temperature. The invention further relates to a method for producing supplementary cementitious materials.