![]() In fact, with regards to the old tanalised timber which I believe is not allowed for normal use where is may contaminate the soil, what would be the danger from the arsenic in the preservative. ![]() Which states that up to half a tonne of wood can be burned at once in the open and that the resultant ash is non-hazardous. One of the many links that I found regarding burning treated wood is this: Other links suggest that the wood is treated with copper and modern Triazole Biocides – not sure if these are different from old fashioned triazole biocides. However, when we (here on this forum, on other forums and in general) talk about tanalised wood, what are we actually talking about? Is it the old tanalised wood that contains Copper, Chrome and Arsenic or the new Tanalith E which, IIRC, contains Copper and Boron. There is no temperature at which a poisonous heavy metal like arsenic is rendered harmless. Industrial incinerators operate at far higher temperatures than those achievable Was the first of nearly 2 million results for a simple google search. These will also be concentrated in any ashes. Pressure treated with copper chrome arsenate.īurning tanalised timber will release into the atmosphere Mespilus wrote:Timber used to be 'tanalised'. If there is cement on the wood you will be sharpening your chainsaw after every cut. ![]() I may try to get a sample of a plank or two and see what they look like when cut. So, based on that, do you reckon that they would be suitable for use in a high temperature boiler (1000 degrees plus)? I reckon that I'd have to clear the ash out a bit more than on virgin wood but I do like the idea of recovering heat from waste products rather than from virgin wood. I imagine that a good hit with a hammer would dislodge most cement but there would likely be some that soaks into the grain. I have not seen the planks yet but I imagine that they would be covered in cement, splodges of paint and other stuff - as well as a strip of metal on the end. These, if suitable, would be used in a gasification boiler. I have the chance to obtain a load of scaffold planks - and I mean a load - probably enough to heat my home for a year or two. Biogas Bottom wrote:Anyone here ever burned used scaffold planks?
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