Den brännugn (för keramik) quark visar bilder på skorstensflammor från är alltså vedeldad, de galningarna använder ved av "ungersk ek" till sina 42 timmar långa sessioner

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Från
http://www.icshu.org/symposia/firemagic2001/fire.htm )
Citat:
"A 42hour firing - the first 24 hours to get to temperature and the rest holding it 1320c for ultimate ash build up on the work.
1. A healthy woodpile -Acat, the Hungarian oak."
Eldrivna keramikbrännugnar tycks ha en maximumtemperaturkapacitet på 2350 grader Fahrenheit, den praktiskt tillämpade temperaturen har jag inte hittat, men den borde väl vara ungefär på samma nivå som den vedeldade varianten, "Firing Fred Olsen's Fire Magic kiln"

:
http://www.paragonweb.com/7261111G00.cfm
Birkenaus krematorieugnar drevs med största sannolikhet i temperaturintervallet 800-900 grader Celsius, och eldades alltså med
koks:
http://www.vho.org/cgi-bin/perlfect/search/search.pl?q=crematoria%20temperature&showurl=%2FGB %2FBooks%2Fdth%2Ffndcrema.html
Citat:
"---On the basis of these experiments it was found that the truly decisive factors, where the time required for a cremation is concerned, are the maximum temperature of the oven and the sex of the deceased. Statisticians graphically summarized the results of the experiments. One of the analysts, Dr. E. W. Jones, commented as follows:[58]
"From his graph he was able to tell us (we thought this rather interesting) that there is a maximum point, or rather a minimum point, of incineration time below which it is impossible to go, and our statistician defined this as a thermal barrier that, because of the make, the nature of human tissues, you cannot incinerate them at a rate which is below round about 63 minutes. Now some people will come up with readings of 60, 59, 58, they are the lower ends of this scatter of readings, and that this thermal barrier's optimum temperature is round about 800-900° C."
The graph shows that the time that most closely approximates the thermal barrier is 60 minutes, given a temperature of 800° C (1470° F). If the temperature is increased to 1000° C (1830° F), the time required for cremation increases to 67 minutes, and at 1100° C (2010° F) it drops again, to 65 minutes. At higher temperatures, which were not investigated, the time would presumably decrease further, and at extremely high temperatures it probably drops below the thermal barrier. Dr. Jones stated that if one wanted to decrease the cremation time in this way to 20 or even to 15 minutes, one would have to construct an oven capable of working at 2000° C (3630° F).[58]
In reality, the cremation process must take place between fairly precise thermal boundaries. At temperatures of over 1100 to 1200° C (2010 to 2190° F) one encounters the phenomenon of sintering, where the bones of the corpse and the oven refractory begin to soften and to melt together (fuse), and at temperatures under 700 to 600° C (1290 to 1110° F) the body merely chars.[59] Dr. E. W. Jones then reports an observation of particular interest to us:[58]
"Our statistician colleague did some work, he looked into the records of crematoria in Germany during the last war, and it would appear that the authorities there were presented with a similar problem - that they came up against a thermal barrier. They could not design a furnace that reduced the mean incineration time to a very practical effective level. So we started to look at why there is this thermal barrier with human tissues."
It was found that the cause of this factor was that the proteins in the human body - when they are heated to 800 to 900° C (1470 to 1650° F) - undergo a chemical transformation. They dissociate and form compounds "that can only be described as a hard crust."[58]
Naturally the cremation process took longer in ovens operating with a coke-fired gas generator. Regarding the time required for the cremation cycle, the data to be found in contemporaneous literature is almost never entirely reliable, first and foremost because what is meant by 'the time required' is very rarely clearly defined, and secondly because one must expect that the data have been distorted for reasons of competition or propaganda.
This is why we shall take data supplied by the technical measuring instruments in the ovens themselves as our objective and incontrovertible starting point. From this perspective, the diagram summarizing the cremations performed by R. Kessler with coke fuel on January 5, 1927, is especially significant. This was a case where one is completely justified in saying that the cremations were carried out under the optimum conditions for an oven with a gas generator, because:
the construction system of the oven was excellent;
Kessler had taken every measure necessary to prepare the oven in terms of heat engineering;
the appropriate technical instruments were used to observe the cremation cycle in every phase;
under the knowledgeable supervision of an expert engineer the operation of the oven went off especially smoothly.
During these experiments the average cremation time was 1 hour and 26 minutes, while the shortest cremation took 1 hour. The average temperature in the muffle was about 870° C (1600° F). We shall return to this point later. In this context it is important to stress that engineer Kessler was using the method of direct cremation. For comparison we refer to a different series of eight cremations that Kessler performed in the same oven, using briquettes instead of coke fuel. That time the average cremation took 1 hour and 22 minutes. Two weeks later the same experiment, using gas heating for the oven, returned an average cremation time of 1 hour and 12 minutes for each of the eight cremations.[60]---"
quark, du får bemöta Lüftls invändning, citerad av bagge1, och utveckla dina teorier om "glödande partiklar och brännbara gaser"...Kan de fenomenen verkligen förklara denna "bolmande eld, dag och natt" som det på många håll fantiseras om?