A porous and easy water soluble amorphous silica which does not contain tar, crystal, residual agrichemicals, and carcinogens, and method and apparatus to produce same, by using only one burning treatment from a plant including abundant silica, including a method of manufacturing the amorphous silica wherein rice family plants are burned while stirring and introducing into the furnace an atmospheric gas having a mass of 6.7 or more and 20 or less of the weight of the rice family plants, or oxygen gas having a weight of 1.4 or more and 4 or less with respect to the weight of the rice family plants, and at the same time as burning, combustion gas generated at the time of combustion is discharged.

A porous and easy water soluble amorphous silica which does not contain tar, crystal, residual agrichemicals, and carcinogens, and method and apparatus to produce same, by using only one burning treatment from a plant including abundant silica, including a method of manufacturing the amorphous silica wherein rice family plants are burned while stirring and introducing into the furnace an atmospheric gas having a mass of 6.7 or more and 20 or less of the weight of the rice family plants, or oxygen gas having a weight of 1.4 or more and 4 or less with respect to the weight of the rice family plants, and at the same time as burning, combustion gas generated at the time of combustion is discharged.

A porous and easy water soluble amorphous silica which does not contain tar, crystal, residual agrichemicals, and carcinogens, and method and apparatus to produce same, by using only one burning treatment from a plant including abundant silica, including a method of manufacturing the amorphous silica wherein rice family plants are burned while stirring and introducing into the furnace an atmospheric gas having a mass of 6.7 or more and 20 or less of the weight of the rice family plants, or oxygen gas having a weight of 1.4 or more and 4 or less with respect to the weight of the rice family plants, and at the same time as burning, combustion gas generated at the time of combustion is discharged.

A porous and easy water soluble amorphous silica which does not contain tar, crystal, residual agrichemicals, and carcinogens, and method and apparatus to produce same, by using only one burning treatment from a plant including abundant silica, including a method of manufacturing the amorphous silica wherein rice family plants are burned while stirring and introducing into the furnace an atmospheric gas having a mass of 6.7 or more and 20 or less of the weight of the rice family plants, or oxygen gas having a weight of 1.4 or more and 4 or less with respect to the weight of the rice family plants, and at the same time as burning, combustion gas generated at the time of combustion is discharged.

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.

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.

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.

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.

The invention makes public heating apparatus for vertically and helically conveying workpiece, including the main bracket, on which interconnected heating furnace and cooling furnace are arranged in parallel; The bracket is placed inside the heating furnace, the 1.sup.st spiral supporting plate is spiraling on the bracket, and conveyer belt is arranged on the 1.sup.st spiral supporting plate along spiral direction; one or multiple gas inlet/inlets are set on the heating furnace body to fill protective gas into furnace;

The 2.sup.nd spiral supporting plate is spiraling vertically inside the mentioned cooling furnace; the direction of the mentioned conveyer belt inside the cooling furnace is uniform to that of the 2.sup.nd spiral supporting plate; drive mechanism for conveyer belt is installed on the mentioned main bracket. One or multiple gas inlet/inlets are set on the cooling furnace body to fill protective gas into furnace; the conveyer belt runs through the mentioned heating furnace and cooling furnace and forms one loop via drive mechanism. The protective atmosphere spiral conveying heating furnace and spiral conveying cooling device is energy-saving and space saving with high efficiency.

An evaporative cooling system for a scrap metal furnace with an afterburner, a rotary kiln and a conveyor that loads scrap metal into the kiln. Pressurized water runs through water lines to two water spray subassemblies. The first subassembly sprays atomized water into a heating duct between the afterburner and a gas recycle return duct. The second subassembly sprays water onto the scrap metal on the conveyor. Water flow through the subassemblies is regulated by one or more water flow controllers, pumps and/or flow sensors, which may be computer controlled. A water heater warms the water to a desired temperature.