CraftWEB Hot Glass Talk  

Go Back   CraftWEB Hot Glass Talk > Hot Glass > General Hot Glass Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 09-07-2017, 07:32 PM
Jordan Kube Jordan Kube is offline
?
 
Join Date: Aug 2003
Location: Seattle, WA
Posts: 1,488
Jordan Kube is on a distinguished road
Recuperated glory hole

This is a recuperated glory hole project I'm doing with Marcel Braun. He hasn't really been active here in awhile but some of you may remember his postings a few years back about oxygen boosting his gloryhole so he could work borosilicate offhand. It's worked out quite well for him but he was in need of a smaller one. I believe his current setup uses 5 gallons of propane an hour and half a large dewer of liquid oxygen a session. I felt like there was some low hanging fruit in building a recuperated burner for the next one.

The dimensions are 12" by 21" inside. The burner is a two burner system with the flue in between the burners. The glory hole is made of Greencast 94 and Mizzou. I think the Mizzou is going to melt, but we will see. It is too hot for platinum thermocouples so we are backing one out into the wall and using the reading in a relative manner.

We're taking it out to East Coast Melt next week and will be doing murrine pulls and other stunts out of it. I'll report back my findings.
Attached Images
File Type: jpg burner mold resize.jpg (83.7 KB, 77 views)
File Type: jpg Marcel's ghole resize.jpg (80.4 KB, 75 views)
File Type: jpg Marcel's ghole 2 resize.jpg (81.1 KB, 69 views)
File Type: jpg Marcel's ghole 3 resize.jpg (73.8 KB, 59 views)
__________________
WWUD? Think for yourself.

Last edited by Jordan Kube; 09-07-2017 at 07:35 PM.
Reply With Quote
  #2  
Old 09-07-2017, 08:17 PM
Rick Kellner Rick Kellner is offline
Registered User
 
Join Date: Jan 2004
Location: Hillsboro, OR
Posts: 119
Rick Kellner is on a distinguished road
Pretty wild, and with the usual impressive fabrication qualities.

Interesting that you mention the relative thermocouple set up. I had been thinking about doing something like that and wondered why it doesn't seem to be used more often as a way to minimize thermocouple expense for furnaces. It seems as though you could establish some parameters initially with spot checks, then downgrade to a type K, stuck farther back in the wall reading a relative benchmark. Might be a good way to economize on a ghetto wire melter, at a minimum.
Reply With Quote
  #3  
Old 09-07-2017, 11:26 PM
Dan Vanantwerp Dan Vanantwerp is offline
Registered User
 
Join Date: Apr 2017
Location: Bozeman, MT
Posts: 103
Dan Vanantwerp is on a distinguished road
Wow. nice design and execution.

I wonder...is it time to start considering another fuel to crank things up for boro...hydrogen maybe? Sooo clean!

I read about a vehicle made by GM the military ordered that ran on hydrogen produced from water.

We're getting there...sustainable energy. Probably a couple/few generations away but it's coming.
__________________
My furnace setting: 2112
Reply With Quote
  #4  
Old 09-09-2017, 11:20 PM
Cecil McKenzie Cecil McKenzie is offline
Registered User
 
Join Date: Feb 2011
Location: Emporia, KS
Posts: 451
Cecil McKenzie is on a distinguished road
"It seems as though you could establish some parameters initially with spot checks, then downgrade to a type K, stuck farther back in the wall reading a relative benchmark. Might be a good way to economize on a ghetto wire melter, at a minimum." Rick Kellner

Rick .... My furnace was originally controlled with a Honeywell dialapak controller. Strictly set point and used k type only. I had it set so it went within 1 inch of the inside of the furnace. 1950 was about 2050 if I remember right. I started out using just k wire and mullite tubes. Worked pretty well . When they started to go bad the furnace got a little too hot and when they failed completely the furnace shut off when the controller maxed out After a number of years i learned about heavier k type thermocouples. They lasted much longer but reacted pretty much the same.

Now I have different controller and platinum . Has not worn out at 2250.
Reply With Quote
  #5  
Old 09-10-2017, 05:25 AM
Paul Hayworth Paul Hayworth is offline
Registered User
 
Join Date: Jun 2002
Location: Port Macquarie
Posts: 151
Paul Hayworth is on a distinguished road
look at Hotwork Recuperative Burner HRB
Reply With Quote
  #6  
Old 09-10-2017, 09:09 AM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 19,251
Pete VanderLaan is on a distinguished road
you might consider MORCO95 as the castable of choice Jordan. From Missouri Refractories Co and available from High Temp in Fenton MO. I've yet to see anything as good.
__________________
Where are we going and why am I in this basket?
Reply With Quote
  #7  
Old 09-11-2017, 04:00 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is offline
Registered User
 
Join Date: Apr 2010
Location: Sweden
Posts: 623
Michael Ahlefeldt-Laurvig is on a distinguished road
Had some light shit in the crown in my furnace for 2 years - it failed after 2 years, cast Greencast 94 crown , it was like new after 17 years, a lot of those years melting at 2480F

Why change from the best?
Reply With Quote
  #8  
Old 09-11-2017, 07:08 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 19,251
Pete VanderLaan is on a distinguished road
because I don't think it's the best.
__________________
Where are we going and why am I in this basket?
Reply With Quote
  #9  
Old 09-12-2017, 11:23 AM
Eben Horton Eben Horton is offline
Registered User
 
Join Date: Apr 2002
Location: Wakefield, RI
Posts: 3,931
Eben Horton is on a distinguished road
How you mix your castable makes more of a difference than what kind it is. I'll take castolite 30 plus over anything...because I know exactly how to mix it.
Reply With Quote
  #10  
Old 09-12-2017, 01:19 PM
Tom Bloyd Tom Bloyd is offline
Registered User
 
Join Date: Nov 2007
Location: Kansas city
Posts: 139
Tom Bloyd is on a distinguished road
I'm with Pete. Morco95 is the best castable I have used. Going on 10th year of furnace with no problems at all.
Reply With Quote
  #11  
Old 09-12-2017, 02:11 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 19,251
Pete VanderLaan is on a distinguished road
Quote:
Originally Posted by Eben Horton View Post
How you mix your castable makes more of a difference than what kind it is. I'll take castolite 30 plus over anything...because I know exactly how to mix it.
****
It would turn to mush in a boro gloryhole Eben. MORCO 95 is a 3400F castable. It's for really nasty situations
__________________
Where are we going and why am I in this basket?
Reply With Quote
  #12  
Old 09-12-2017, 02:13 PM
Jordan Kube Jordan Kube is offline
?
 
Join Date: Aug 2003
Location: Seattle, WA
Posts: 1,488
Jordan Kube is on a distinguished road
Quick update:

We got the glory hole up to borosilicate working temperatures without oxygen boosting, as I predicted. Making an educated guess I would say it used 3 gallons or less an hour. I'm betting we got one gallon from the downsize and another from recuperation. As Hugh and Charlie have repeated here, door fit and closure is key. We worked a bit with the 6" door open and it lost a little temp after awhile. When we had someone keeping the doors closed we had no problems. It got really hot again really quick. The Mizzou liner looked ok but I bet it breaks down after a bit. The Greencast 94 is not happy in the doors and going up and down with the glory hole. I see more cracks in that than is typical with Mizzou or Kastolite. Seems best used in a furnace.

The nozzle mix burner is too cool though. You can develop any flame you like. We had an exhaust plume coming out of the flue like a furnace on high fire but there was no reduction, it was just hot plasma!
__________________
WWUD? Think for yourself.
Reply With Quote
  #13  
Old 09-12-2017, 02:46 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 19,251
Pete VanderLaan is on a distinguished road
I wonder Jordan if you could do an additional door which is made of insulation and covers the hot face of the door when it's open. I think any refractory is going to break up in an up and down cooling cycle so the trick is that extra insulator? Question is how to do it.
__________________
Where are we going and why am I in this basket?
Reply With Quote
  #14  
Old 09-12-2017, 04:48 PM
Jordan Kube Jordan Kube is offline
?
 
Join Date: Aug 2003
Location: Seattle, WA
Posts: 1,488
Jordan Kube is on a distinguished road
The little door isn't actually that big of a deal. It's more evenly hot than the rest.
__________________
WWUD? Think for yourself.
Reply With Quote
  #15  
Old 09-12-2017, 05:35 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 19,251
Pete VanderLaan is on a distinguished road
well, pick your door. The point is keeping it from cooling down and then drawing the heat from the gloryhole. Hard refractory does it way worse. No news there. If you could keep it warm cooling would be a boost but also a lot of work in welding and design. .
__________________
Where are we going and why am I in this basket?
Reply With Quote
  #16  
Old 09-12-2017, 06:52 PM
Eben Horton Eben Horton is offline
Registered User
 
Join Date: Apr 2002
Location: Wakefield, RI
Posts: 3,931
Eben Horton is on a distinguished road
Quote:
Originally Posted by Pete VanderLaan View Post
****
It would turn to mush in a boro gloryhole Eben. MORCO 95 is a 3400F castable. It's for really nasty situations
Ah yes.. I forgot about the Boro part..
Reply With Quote
  #17  
Old 09-13-2017, 09:17 AM
Jordan Kube Jordan Kube is offline
?
 
Join Date: Aug 2003
Location: Seattle, WA
Posts: 1,488
Jordan Kube is on a distinguished road
I have to say I couldn't have done this without the kind and generous Hugh Jenkins. His guidance and support has been invaluable.
__________________
WWUD? Think for yourself.
Reply With Quote
  #18  
Old 09-13-2017, 03:23 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 19,251
Pete VanderLaan is on a distinguished road
Quote:
Originally Posted by Jordan Kube View Post
I have to say I couldn't have done this without the kind and generous Hugh Jenkins. His guidance and support has been invaluable.
********
And that's extremely well said, Thank You! Hugh is a Lion in this world and it's always good to see attribution for the shoulders you get to stand on..
__________________
Where are we going and why am I in this basket?
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 06:23 AM.


All published comments within these message boards are the opinions of its contributor and does not represent
the opinion(s) of the owner(s) of this website. Please see the Terms of Use file for more details.

Books to Help Artists Avoid Online Scams: Top 10 Email Scams | Social Media Scams

Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
CraftWEB.com. Opportunity Network. 2008. All Rights Reserved.