Disclosed are adjustable kiln flights for rotary kilns and associated methods. The kiln flight includes a base configured to be secured to a rotary kiln surface of a rotary kiln. In some aspects, the kiln flight includes a flight body rotatably supported on the base such that an angular orientation of the flight body is adjustable. In various examples, the kiln flight includes a height adjuster movably supported relative to the base such that a height of the kiln flight is adjustable. A method of controlling a rotary kiln with the adjustable kiln flight includes supporting a kiln flight on a base that is secured to an inner kiln surface of a rotary kiln, and adjusting at least one of the angular orientation of the kiln flight or the height of the kiln flight.

In a reaction apparatus, a kiln part includes a supply port configured to receive a raw material supplied to one end side thereof, a discharge port configured to discharge a reaction product to another end side thereof, a cylindrical par extending along and rotatable around a central axis thereof, and a baffle plate provided so as to extend from an inner wall of the cylindrical part and pass through a central area of the cylindrical part including the central axis thereof. A driving part rotates the kiln part around the central axis. A heating part heats an outer peripheral part of the kiln part. The kiln part is configured so that a received predetermined raw material is conveyed to the discharge port along the central axis while being in contact with the baffle plate.

A pyrolyser may include a rotary kiln configured to pyrolyse feedstock material received therein. The pyrolyser may also include a heating vessel surrounding the rotary kiln and defining a heating chamber for hot gases. The pyrolyser may further include an agitator disposed within the heating chamber. The agitator may be configured to agitate the hot gases. The agitator may be rotatable with the rotary kiln.

A thermal treatment reactor for feedstocks and method of use. The thermal treatment reactor comprises an infeed assembly, a furnace, a rotary drum, a discharge assembly, and a liberator assembly. The rotary drum may comprise forwarding flights, mixing flights, oscillating flights, and raking pins. The feedstock to be thermally treated enters the reactor through the infeed assembly. The feedstock is fed into the reactor in a controlled manner by means of a screw conveyor system. The thermally-treated product exits the reactor via the discharge assembly, which separates the thermally treated product into a VOC liberator, from whence the product enters into a cooling system to reduce the temperature for safe storage and handling.

The present invention relates to a rotary kiln for burning carbonate-containing material, in particular limestone or dolomite, including a rotary tube having an inlet end for feeding the material to be burned and an outlet end for discharging the burnt material, and a burner unit arranged in the region of the outlet end, the rotary tube having an inlet zone at its inlet end and an outlet zone at its outlet end, a preheating zone and a combustion zone being arranged between the inlet zone and outlet zone in the direction of transport of the material. The rotary kiln is characterized according to the invention in that at least one projection is arranged in the outlet zone of the rotary tube, the at least one projection having a contour tapering in the direction of rotation of the rotary tube. The present invention further relates to a method for burning carbonate-containing material, in particular limestone or dolomite.

The present disclosure relates to the technical field of phosphogypsum dehydration treatment, and provides a device for harmless treatment of phosphogypsum by calcination using high-temperature ceramsite, including a rotary kiln, a first feeding unit, a second feeding unit and a sorting assembly, where the rotary kiln includes a first rotary kiln drum and a second rotary kiln drum; a first interlayer channel is formed between the first rotary kiln drum and the second rotary kiln drum, and a head end of the first interlayer channel is connected to a head end of the first rotary kiln drum; the first feeding unit is used to input high-temperature ceramsite into the first rotary kiln drum; the second feeding unit is used to input phosphogypsum into the first interlayer channel; the mixture in the first rotary kiln drum and the phosphogypsum in the first interlayer channel can exchange heat to dehydrate the phosphogypsum; the sorting assembly is used to sort the mixture output from the first rotary kiln drum to obtain calcined phosphogypsum. The present disclosure enables high calcination and dehydration efficiency of phosphogypsum, and can achieve low-carbon harmless treatment of phosphogypsum to obtain phosphorus building gypsum.