Cremation, as an option for the final disposition of a deceased person, has been around for thousands of years. While the beginnings of cremation involved somewhat primitive methods for achieving the end result, modern times and technology have given rise to a more standardized version of the process. Companies throughout the world manufacture human size cremators that reduce the amount of time necessary to complete the cremation to less than 2 hours. Here is how the cremation process works.
Before a deceased person is cremated, a funeral director must first obtain authorization to cremate the decedent from the closest surviving family members(s). This is usually in the form of a document provided by the funeral home and signed by the family.
Next, the funeral director must remove any items not wished to be cremated along with the body such as jewelry. If the deceased had a pacemaker or other type of medical device, it too will need to be removed to prevent an explosion from occurring during the cremation process. It is not necessary to embalm a body before the cremation unless the family wishes to have a public viewing of the body during a memorial service.
The body is then placed in a cremation casket, usually made of wood, or more often a cremation container which is basically a large cardboard box with a plywood bottom for sturdiness. These types of containers will burn fairly well during the cremation cycle.
The funeral director or crematory operator will place an identification tag in the cremation container with the body to properly identify the cremated remains once returned to the funeral home. This is a very important step as it insures the family does not end up with the wrong set of cremated ashes.
The cremation container/casket containing the body is then placed in the cremation chamber from the end. The cremation chamber, sometimes referred to as the retort, is lined with fire resistant bricks on the walls and ceiling. The floor is made from a special masonry compound formulated specifically to withstand extremely high temperatures. Once the body is in, the chamber door, which is about a half a foot thick, is closed either by hand or in some cases a switch as many of the newer models have automated doors.
The crematory operator then starts the machine which normally goes through a warm up cycle before the main burning begins. After the machine is warmed up, the main burner ignites starting the process of incinerating the body. Temperatures within the chamber often reach the 1800°F – 2000°F range. The burners within a cremator are fueled by either natural gas or propane.
It generally takes about 1-1/2 to 2 hours for a body to be completely reduced to just the bone fragments by cremation. Some cremation furnaces, especially the older ones, may require a little more time.
Processing the Ashes
After the entire incinerating process is complete, a cool down period of 30 minutes to an hour is required before the bone fragments can be handled for further processing. When the time finally arrives, the cremated remains or bone fragments are removed from the cremation chamber and placed on a table work area. It is here that the crematory operator removes all metal debris such as screws, nails, surgical pins or titanium limbs/joints with a magnet and by hand.
The remaining bone fragments are then placed in a special processor which consists of a cylinderical container with motorized blades at the bottom of the unit. This processor pulverizes the bone fragments to a fine powder called cremains or more commonly referred to as the ashes.
The ashes are then placed in a plastic bag within a temporary cremation container or an urn provided one is furnished to the crematory. The ashes are then returned to the family.
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