Advice/opinions on ceramic sleeve/mini glory

[Fredi Vilina]

I have several 8"dia. 2600deg. vacuum formed sleeves 1/2' thick by 12" deep that I was thinking for making a mini glory hole with one and back with high temp frax in a can with a Ward Ransom V-1 venturi burner and kastolite30 retention ring with a 6" opening - no door just the opening. I am wondering on the safety of this from an airborne standpoint as these sleeves break down and wear away. Would it help to ridgidize it or coat it with like green patch or skip it altogether and cast a thicker sleeve either mizzou or kastolite30? or some combo. I have all the parts for any of the various scenarios, and a couple replacement sleeves for when they get eaten away I would just like something that heats up quick 1/2 hr to an hr.,is economical to run and doesn't pose a health threat. All your opinions and advice are appreciated.

[Steve Stadelman]

Perhaps you could get a little colloidal alumina and further soak the sleeves to further rigidize them. I have a company out here (Western Industrial Ceramics) that does vacuume formed parts of high temp fibers just like Danser and they are pretty sure that these do not shed too terribly. However they also sell them. I would just use the same rule of thumb that we always try, ventilate, ventilate, ventilate.

I guess I feel a lot better about the formed high-temp fibers than glories made of batted-up blanket.

[Dave Bross]

wesbond (wesbond.com) has colloidal alumina in powder form. They call it wesolok D. You add it to water at about 20 - 30% and mix for 20 minutes or mix for 5 minutes, let it sit an hour, and mix another 5 minutes. it rigidizes the frax very well. Their RFC 17 furnce coating is also good inside a frax glory too. I have a frax glory done this way and it has been doing quite well for a while. Comes up to heat very quickly.