JHCC

Recommendations for Working with Anthracite

Recommended Posts

Probably best to ask questions on the thread for the actual rule:

 

Share this post


Link to post
Share on other sites

Dan, you can select a specific section of a post that pertains to your reply and a box will come uner it saying "quote seletion" click that and it will save unnecessary quoting of the full post. If replying to the whole previous post right before yours, there is no need to quote it. 

No problem with newbies creating a thread if they need help or have something to show or information to offer. 

Share this post


Link to post
Share on other sites

Silo house Dan:  the information you are asking for.. Is complex in nature but simple in form..  

Complex because as most pointed out it really depends on what you forge, size of metal, shape of metal that needs to be heated.  stack, no stack.. etc, etc.. 

Today there are many things that are frowned upon and everybody will tell others not to....   (ive used cement and cored bricks for forges in the past and yes they can explode).. The cement was like 50% salt and it worked just fine.. But that is a different story.. 

With this said, someones experienced that has done things against the grain for years will get an earful...   

So as far as forge design goes..  I'd also suggest a model that you can adapt until you figure out what you want in a forge.. I built 6 forges of various means till I figured out I was doing it all wrong and then also figured out that some of the information that was talked about as being correct was in fact not correct... 

So, first figure out what you think you would want to make..  Then your question can be narrowed down more....   Or you can make a test bed using sheet steels, box of dirt, and a blower with a known CFM at a given inch of water to supply what you want to do..   

Ok, as to blower... You want a blower that will always supply you with more air vs not enough... I'm using soft coal now that has a bunch of fines in it.. The way you get rid of the fines is to increase blast and blow the fines out of the firepot into the flue...  This would not be possible if I did not have a large enough blower that generates enough blast pressure to do it..  

You can have a blower that will blow enough air at ambient pressure (no restrictions) but will fail miserably as soon as it faces any resistance.. The CFM will drop off to nothing.. 
 

Years ago I went through and looked at making my own hand crank blower and figure for soft coal it was like 250cfm at like 3lbs per square inch... This is very vague now as I was like 11 years old.. I had done the math, blah, blah, blah.. 

Someone should make up a sheet with CFM and pressure needed for  charcoal, soft and hard coal and coke..   They all take different levels of air volume and pressure...   At 3PSI I found I couldn't even keep a shallow charcoal fire in place unless it was well banked..  But hard coal would barely stay lit... 

Anyhow, it's a fairly low pressure that is needed unless you are driving air through like for the reason above.. 

As to operation of the fire.. Velocity of the air is also a factor coupled with volume and pressure and again comes back to the size of the blower.. 

Link back here if you do start a separate thread.. Be interested to follow up...  

Share this post


Link to post
Share on other sites

Well I was trying for information specific to Anthracite and this thread I thought was about it.  I am working on a volumetric spread sheet on my ribbon burner design. waiting on a good quality gas flow meter.  I dont think you could make one on a coal forge due to ambient interactions of the open fuel chamber... ?

Share this post


Link to post
Share on other sites

You need to be more specific. More like this.. .  Do you want to know how to start a hard coal forge?   I want to forge hammers in the 1lbs to 4lbs and maybe some other items like top fullers,  and such.. No long pieces..   What am I looking  for in firepot size? 

I am going  to be using a hard coal forge for general purpose forging  from gate hooks to 16lb sledge hammers..   

I'm going to be forging  only small leaves up to about 3/4" round or square stock.. How big of a forge hearth do i need..  

General questions have all ready been answered.. Quite nicely...         2+____=___   is hard to answer.. 

Again.. you need direct questions....   What do you plan on making? Lets start there.. 

So If I were to guess at you question... 

YOU want to know if you can use a Hard coal forge  as a gasification unit like in an Closed hearth furnace>>  

I'm using closed here as I am trying to figure out your exact question...    Closed as in just a flue on the other side of the charge..  (Typically known as and open hearth furnace)

Share this post


Link to post
Share on other sites

WOW  never mind, dont like the tudes I jeep getting here..  I put up drawling,  explained my self, asked question pertaining to Anthrasite.  I give up. 

Good bye Please delete me!  

Share this post


Link to post
Share on other sites

Well, I'm sorry to see you go.. What you posted showed a rough drawing of an extremely small hood mounted or shown upside down..   What are the upright straight pieces on the sides of the tapers? 

Having a conversation is a question and answer with statements thrown in for good measure..   

If you can't discuss a project because you don't have the lingo..  It's ok.. Take your time and we can work through it.. But I personally can not read your mind and the drawing you posted is not a fire pot..  

Again.. in order to answer your question one needs more information..  No one was being sassy..   So, don't have a knee jerk reaction in frustration..  We are all frustrated that the information can not be started to help.. 

Share this post


Link to post
Share on other sites

the only attitude was when you demanded we approve your posts faster.  

Share this post


Link to post
Share on other sites

Thank you for this information! I have been forging with anthracite for about a year and a half now, and its nice to see information brought together to make things easier. One thing, the smaller size coal from tractor supply really likes to pop and jump, and will bite you pretty solidly. I have had decent success using the bigger size, then putting the smaller on top as a gap-filler. Other than chasing the fire around sometimes, It works ok at keeping the fire hot when I cant crank for a minute or two.

What I haven't had any success in is mounding it up and poking the hole in the top for the little volcano (Pardon the childish imagery). Does Anthracite need a hole poked down into the fireball?

Thanks again,

Randell 

Share this post


Link to post
Share on other sites

You won't have any luck with that.. It only works with soft coal..  It won't work with coke or charcoal either.. But ideally you don't need to do that anyhow.. 

No need for a hollow fire as there is not the same formation of coke (expanding) created with soft coal.. 

Share this post


Link to post
Share on other sites

Poking a small hole in the top of the soft coal is to lets a flame ignite the smoke being produced by the green coal turning into coke.

With good fire maintenance the green coal cokes up on the outside edge of the fire, and is brought into the fire as the fuel burns and needs to be replaced. That way, covering the fire with green coal is not needed.

Share this post


Link to post
Share on other sites

Poking a hole in the top can help with airflow as you're getting the fire started. Once the fire is established, it's not so important.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.