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Old 02-19-2014, 09:33 AM
Serf
 
Join Date: Apr 2013
Location: Texas
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Default air pump

Has anyone tried using an air pump to get the fire going? I've started using one (the kind for inflating mattresses) with a metal pipe and it gets the fire roaring in no time. Also helps to move ash out of the cooking area.
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Old 02-20-2014, 02:59 PM
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Join Date: May 2011
Location: South Australia
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Default Re: air pump

I tried it with my oven. Certainly works, It also works if you point the pipe up your flue to induce some draughting via the venturi effect.
However, my air pump is the kind you plug into your cigarette lighter socket, so it was OK for the experiment, but too cumbersome for regular use.

I've never quite gotten around to buying one with internal dry cells.
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Old 02-20-2014, 04:53 PM
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Default Re: air pump

if you have daughters there should be plenty of hair dryers around the house.
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Old 02-21-2014, 07:21 AM
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Location: Bucks County, PA
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Default Re: air pump

I use a Weed Dragon propane torch....lay that inside the oven for five mins.
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Old 02-23-2014, 09:17 AM
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Default Re: air pump

Ive built a blast door out of aluminum, it works great, no need for tools, less than 40 seconds its placed at the entry and the fire is all lit.
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Old 02-24-2014, 03:40 AM
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A petrol leaf blower gets the fire going more like a blast furnace!
Tried it once with wet wood and it worked a treat. I would not recommended using it on a regular basis as it gets the oven very hot very quickly, probably too quick for the bricks to react, a high risk of cracking your oven.
An old mate of mine had contract to provide the Port Pirie smelters with firewood which was used to start their blast furnaces after relining. Oil and gas fires heated the firebricks too quickly cracking the bricks and requiring an other reline.

Neill
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Old 02-24-2014, 06:01 AM
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Default Re: air pump

Another thing that has been working well is "Wood Brick Fuel" These are made from recycled sawdust that are compessed into bricks. I use one of these to keep the fire going when the wood is wet.
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Old 02-25-2014, 03:41 AM
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Default Re: air pump

Quote:
Originally Posted by nissanneill View Post
A petrol leaf blower gets the fire going more like a blast furnace!
Tried it once with wet wood and it worked a treat. I would not recommended using it on a regular basis as it gets the oven very hot very quickly, probably too quick for the bricks to react, a high risk of cracking your oven.
An old mate of mine had contract to provide the Port Pirie smelters with firewood which was used to start their blast furnaces after relining. Oil and gas fires heated the firebricks too quickly cracking the bricks and requiring an other reline.

Neill
G'day Neill
Sensibly put .......

air pump-image.jpg
Try this at your peril

It's an old pic but always makes people smile
Regards dave
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Old 02-26-2014, 12:50 AM
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Thumbs up Re: air pump

In all honesty, it worked an absolute treat especially on idle. Give it some gusto and all hell breaks out, sparks fly straight up the chimney and after a few moments to a minute, you have a roaring and I mean roaring fire!

Neill
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Old 02-26-2014, 03:21 AM
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Default Re: air pump

Quote:
Originally Posted by nissanneill View Post
A petrol leaf blower gets the fire going more like a blast furnace!
Tried it once with wet wood and it worked a treat. I would not recommended using it on a regular basis as it gets the oven very hot very quickly, probably too quick for the bricks to react, a high risk of cracking your oven.
An old mate of mine had contract to provide the Port Pirie smelters with firewood which was used to start their blast furnaces after relining. Oil and gas fires heated the firebricks too quickly cracking the bricks and requiring an other reline.

Neill
A small point of order -it is the slag fuming furnaces that are started with firewood and burners.

Once it's all alight, pulverised coal gets blown into the bottom as molten blast furnace slag is poured in the top.
It hasn't got much to do with firebricks. More to do with having a really big fire going when we start feeding the furnace.

We get the firewood by the semi load. It was always from the Wirrabara forest, supplied by Morgans.
I think it still is, maybe via the Jamestown sawmill? The bushfire might change things significantly, since about 90% of the forest was burned.

No fire bricks in the Port Pirie blast furnace. The tub at the bottom is lined with castable, but we only replace that every twenty years or so. Maybe once or twice in the 38 years I've worked there.
Apart from that, we don't actually "re-line" the Blast Furnace.

The walls are water cooled jackets, the protective lining is actually a layer of frozen slag.
We generally shut it to do maintenance that can't be done on the run, like repairing worn/leaking jackets, etc.

After a shutdown, the furnace is assembled by bolting all the water cooled jackets together, then we blow it in roughly like this:

a sacrificial gas burner is put in, lit, and coke gradually added, when the coke is alight and there is a nice big bed of burning coke, we start blowing oxygen enriched air through the tuyeres, and adding coke and sinter. Eventually the whole lot starts burning and melting and a mixture of slag and molten bullion starts running out the taphole.

This is roughly how it goes - it isn't a spectator sport.
It's tricky to manage, even for the most experienced of hot metal guys, so non-essential personnel aren't welcome while the furnace is being blown in - I've only seen it a couple of times.
We generally let spectators watch from across the road.

Last edited by wotavidone; 02-26-2014 at 03:30 AM.
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