ThomasPowers Posted July 10, 2014 Share Posted July 10, 2014 And this is insulating how? Quote Link to comment Share on other sites More sharing options...
Frosty Posted July 11, 2014 Share Posted July 11, 2014 I should've looked at the link. I don't think our new fellow knows the difference between refractory and insulation Thomas. I suppose at some level they are synonymous and he's using a translation program. The refractory you are looking at using is NOT an insulator. It is a high alumina refractory which is good as a forge liner, it is resistant to welding fluxes and is tough at working temperature. It is no better insulation than an inch or two of concrete would be. You need to use either an insulating refractory and accept the reduced toughness and flux resistance or a ceramic blanket like Kaowool and accept the fact it is outright fragile at temp and molten fluxes dissolve it like hot water on cotton candy. You can coat an insulating refractory with materials designed to armor it against most abuses. You can even make a double wall liner, think 15-20mm of hard refractory like the Secar and wrap it with Kaowool or surround it with an insulating refractory. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
santisandreas Posted July 11, 2014 Author Share Posted July 11, 2014 yeah you are right i didn't know the difference between the two. i wasn't sure what to use just like before with the previous forge. can you explain a bit? i am planning to use kaowool in particular the one at the link at the end of the post which is the only one I have foundd in my country, and then I want some insulating refractory to coat the blanket in order to make it more durable. BUt I am not sure which one to get as you can seee, and could use any suggestions. Before I was looking for refractory that will resist high temperatures to aply it on top of th ekoawool, then I planned on placingg another layer of ITS-100 from hybrid burners to ad further UV insulation http://www.castreekilns.co.uk/ceramic-fibre-blanket-96kgm-2266-p.asp There is no need for UV insulation, its IR you need. Also I corected the blue problem Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted July 11, 2014 Share Posted July 11, 2014 Ok it makes a difference if you are just using it as a protective coating over an insulating refractory---but you don't need much and if possible you want it to be an IR reflector as well. Quote Link to comment Share on other sites More sharing options...
Frosty Posted July 11, 2014 Share Posted July 11, 2014 It'll work very well as a coating over the ceramic wool insulating refractory. If you mix the first coat fairly wet and wet the ceramic blanket so the refractory actually soaks in a little it will make a much better bond. Then you can lay on stiffer mix for strength over the first stiffening coat. Remember, many thin coats is FAR better than one thick one. The thicker the wet refractory the more likely it is to shrink check as it dries, like mud in the sun. You're on the right track brother. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
santisandreas Posted July 12, 2014 Author Share Posted July 12, 2014 thanks a lot Frosty and Thomas. i will update the post with the construction of the forge. Quote Link to comment Share on other sites More sharing options...
santisandreas Posted September 28, 2014 Author Share Posted September 28, 2014 hey everyone. i am resuming the post since i am well on to build a new forge with some more problems occurring along the way. again the forge is a bit too big because i calculated the measurements for the cubic inches wrong. but it is going to be repaired. it has more depth than it should have so i will cut it a bit shorter. one other problem is that i wasn't able to find an insulating refractory and tried to cover the kaowool with a fireplace refractory but it doesn't work. the heat of the burner gets lost in it so i have decided to order it online. can you please tell me if this is the product i nedd from the link bellow? thanks in advance. http://shop.vitcas.com/forges--heat-treatment-furnaces-44-c.asp Quote Link to comment Share on other sites More sharing options...
santisandreas Posted October 2, 2014 Author Share Posted October 2, 2014 hello again the forged is finished, almost actually. i have decreased the chamber bu cutting a small portion from the front and now it reaches a goo enough heat. but not welding heat i think. i guess its because it is losing some heat from the front because the door is not closing. the insulation inside is just kaowool and i haven't yet coated it with ITC 100. is it gonna make a difference if i coat it with this.? take a look and tell me what you think. a lot of mistakes have happened but i have learned a lot fro the process and i hope the next one will be even better. any advice will be helpful. thanks again. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted October 2, 2014 Share Posted October 2, 2014 Actually this comment is excellent: "I hope the next one will be even better" Much of forging is an iterative process and that includes making tools! Use it a while and keep a list of improvements you want to include in the next version.Well Done! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.