Re: Hog Fuel

Daniel A. Mitchell

Not saying this is wrong, since ground up bark can well be a part of “Hog Fuel”, but in mills I’ve visited ALL the “slash” (odd pieces of wood) produced in the cutting proccess is sent (usually by conveyors) to the “hog” to be ground up. Bark would be only a small fraction of the wood being ground up. Also many smaller mills did not have the bark-stripping water jets. On reason the logs were put in the ponds in the first place was to soak off the dirt and rocks lodged in the bark, and to loosen the bark. The floating logs (some sink) were also easier to move about and feed into the mill’s jackslip.

It is common for old log ponds and rivers to have many feet of rotting bark at their bottoms. It’s sometimes a problem when trying to backfill the ponds for redevelopment. The crud won’t support things built upon it. The solution is to either dredge out the material, or drive piles clear through it.

With modern log-handling machinery ponds are hardly ever used anymore, and far more powerful mechanical "debarking” machinery is used. 
Dan Mitchell

On Aug 8, 2018, at 1:37 AM, Jim Sabol <jimsabol@...> wrote:

The hogger is that part of the mill’s jackslip (the approach from the log pond to the saw carriage in the mill interior) which shoots water at great force onto the entering log in order to dislodge rocks, spikes, and other debris caught in the bark that  wpuld be harmful to the sawblades.  The bark thus dislodged is therefore, “hogged” and, in some mills, provides fuel for the boilers.  The more finely chopped bark is also used by landscapers and ranchers to improve  footing in muddy areas. Most speakers drop the “ed” resulting in the half-term, hog fuel, just as some persons hear “duck” tape for duct tape.  Neither hog fuel nor hogged fuel has anything to do with feeding pigs.

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