Apparatus for using hazardous waste to form non-hazardous aggregate

An apparatus for converting hazardous waste into non-hazardous, non-leaching aggregate, said apparatus comprising:

• a rotary kiln having an entry portion;
• oxidizing means in flow communication with said kiln, said oxidizing means comprising at least one water-cooled, metal-walled vessel;
• a source of solid waste material, said solid waste material comprising large solid waste and waste fines;
• means for separating said large solid waste from said waste fines;
• means for introducing said large solid waste to said entry portion of said rotary kiln;
• means for introducing said waste fines to said oxidizing means;
• means for inducing combustion in said kiln to convert said large solid waste to solid particulate primary aggregate, clinker, volatile gases and gaseous combustion by-products;
• means for inducing combustion in said oxidizing means to convert said waste fines, said volatile gases and said gaseous combustion by-products into noncombustible fines, molten slag, and waste gas;
• means for introducing said solid particulate primary aggregate and said noncombustible fines to said oxidizing means and to said molten slag to form a substantially molten mixture;
• and
• means for removing said mixture from said apparatus.

An apparatus for converting hazardous waste into non-hazardous, non-leaching aggregate, said apparatus comprising:

• a rotary kiln having an entry portion;
• oxidizing means in flow communication with said kiln, said oxidizing means comprising at least one water-cooled, metal-walled vessel;
• means for controlling the temperature within said oxidizing means;
• a source of solid waste material, said solid waste material comprising large solid waste and waste fines;
• means for separating said large solid waste from said waste fines;
• means for introducing said large solid waste to said entry portion of said rotary kiln;
• means for introducing said waste fines to said oxidizing means;
• means for inducing combustion in said kiln to convert said large solid waste to solid particulate primary aggregate, clinker, volatile gases and gaseous combustion by-products;
• means for inducing combustion in said oxidizing means to convert said waste fines, said volatile gases and said gaseous combustion by-products into noncombustible fines, molten slag, and waste gas;
• means for introducing said solid particulate primary aggregate and said noncombustible fines to said oxidizing means and to said molten slag to form a substantially molten mixture;
• means for removing said mixture from said apparatus;
• and
• means for cooling said substantially molten mixture to form said non-hazardous, non-leaching aggregate.

An apparatus for converting hazardous waste into non-hazardous material, said apparatus comprising:

• a source of solid waste material, said solid waste material comprising large solid waste and waste fines;
• a separator for separating said large solid waste and said waste fines;
• an oxidizer comprising at least one vessel;
• a device for introducing said waste fines to said oxidizer;
• a device for inducing combustion in said oxidizing means to convert said waste fines into noncombustible fines, molten slag, and waste gas;
• at least one conduit for passing said waste gas and said non-combustible fines from said oxidizer;
• a separator for separating said noncombustible fines and said waste gas;
• a device for introducing said noncombustible fines into said molten slag in said oxidizer to form a substantially molten mixture;
• at least one exit from said oxidizer for passing said substantially molten mixture from said oxidizer;
• and
• a device for cooling said substantially molten mixture to form said non-hazardous material.

Apparatus for converting hazardous waste into nonhazardous waste, such apparatus comprising:

• a vessel;
• a source of solid waste material comprising;
• large solid waste and,
• waste fines
• means for separating said large solid waste from said waste fines,
• a device for introducing said waste fines into said vessel;
• a device for introducing combustion into said vessel to convert said waste fines into;
• non-combustible material;
• molten slag and;
• waste gas;
• combustion means for converting said large solid waste into solid particulate primary aggregate;
• a device for separating said non-combustible material, molten slag and waste gas;
• a collector for collecting said molten slag;
• means for introducing said non-combustible material into said molten slag and means for introducing said solid particulate primary aggregate into said molten slag to form a substantially molten mixture;
• a device for passing said substantially molten mixture from said apparatus.