A rotatable environmental chamber for reducing solid waste includes a cylindrical container having front and rear end caps, seal bearings and support plates for journaling the container each having a central opening. The seal bearings are pinned to the end caps and fit into counterbores in the support plates. Pipes in communication with the inside of the container are connected to holes in the front end cap and seal bearing. Holes in the front support plate are aligned with recessed areas in the seal bearing. Liquids and/or a gas can be introduced through the front support plate and seal bearing to the container through the pipes as the container rotates. Variable pitch vanes inside the container are used to mix and direct the flow of waste. Isolation valves are used to seal the container. The environmental chamber may be used in a process for anaerobic and aerobic decomposition of organic materials and for reducing plastic and metals to other compounds.

Environmental chamber and method for composting solid waste

A port assembly for delivering fluid through a shell of a rotary kiln is disclosed with structures for screening and excluding particulate matter from the port during operation of the kiln. The port assembly comprises a cylindrical nozzle defining a nozzle orifice to deliver fluid to the interior of a kiln. A base member secured to one side of the nozzle is provided with a platform extending partly through the nozzle orifice and cooperates with the nozzle to define an annular chamber. Facing surfaces of the base member and nozzle define a fluid distribution cavity for providing fluid to the annular chamber for ultimate distribution into the kiln. An annular shoulder surrounding the platform within the fluid distribution cavity cooperates with a facing surface of the nozzle to define a particle barrier gap. The annular chamber and particle barrier gap form a screening mechanism whereby particles too large to pass into the chamber are excluded and particles small enough to pass into the chamber are excluded by the gap. Passage of particle smaller than the particle barrier gap through the gap is opposed and flushed by a turbulent flow of fluid from the fluid distribution cavity.

Gas injecting kiln shell nozzle with particle entry barriers

In a direct iron reduction process of the type utilizing a rotary kiln, oxidizing gas is blown into the bed in the rotary kiln so as to increase the temperature of the bed and to increase the speed of movement of the gas in the bed.

Apparatus for direct iron reduction

A process and apparatus are disclosed for delivering fuel and air to a rotary reduction kiln wherein both the fuel and air alternately flow through the same fluid distribution nozzle. Means are provided about the kiln for operating means to alternately deliver of fuel or air through the same nozzle. At least one of the operating means is selectively movable into and out of the position of operating said valve.

Reduction kiln having a controllable distribution system

A method for the decomposition of chromium ore in a directly heated revolving tube is described, in which oxygen-containing gases are introduced into the revolving tube by means of below-bed nozzles.

Method for manufacturing alkali chromates from chromium ore

The present invention relates to an apparatus for performing metallurgical or chemical reactions in a rotary kiln. The performance of metallurgical and chemical processes in a rotary kiln is advantageous Inasmuch as the material is continuously turned over and thoroughly mixed during the whole...

Kurt R. Gohre

Papers

Apparatus for the performance of metallurgical or chemical reactions