During a cremation, the body is burned to form flue gas, ash, mineral fragments (bones), and heat. The ash and mineral fragments are returned to the family, where it is buried at cemeteries, interred in memorial sites, or scattered. Bones can be crushed in a cremulator to be added to the urn content. This process poses no health risks.
In the process of coffin cremation, the coffin is placed on the upper hearth. After the highly combustible components of the coffin and cadaver have burnt away, the remains are raked down onto the lower hearth, where the remainder of the combustion takes place. A second coffin can be placed on the upper hearth while the remains of the first cremation are burning out on the lower hearth.
Waste, medical, municipality, and gold-recovering incineration specialists.