Support #52


Added by Ben Barnett over 8 years ago. Updated over 8 years ago.

Status:In Progress Start date:02/17/2012
Priority:Normal Due date:
Assignee:- % Done:


Target version:-


I have a small cylindrical furnace about 1" ID X 3" deep. What are we looking for?



Updated by J. Simmons over 8 years ago

  • Status changed from New to In Progress


We have two main goals with this project. Obviously, the first goal is to create a furnace for use at Dayton Diode by its members. Second, if we are successful, we would like to turn the design into a kit to sell to other spaces and hobbyists.

Regarding the size of the furnace, we are looking to fabricate a furnace with internal dimensions around 11 in x 11 in at the base, and 13 in tall. Is the one you have really 1 in inner diameter by 3 in tall? That seems very small. If those units are really feet, then I think it would be great to get a look at it to see how it is put together.



Updated by Ben Barnett over 8 years ago

The dimensions are inches. I am surprised that we are considering building a furnace from scratch. I have built several furnaces, but never when a COTS furnace was available. What is the proposed kit cost? Generally, kilns used by folks that make ceramics as a hobby are far less expensive than buying the materials and the equipment for cutting and fitting those materials. I have some capability here for machining high-temperature insulation, but noting for panels as large as you propose. I will get quotes on ceramic kilns and see where it hits your budget.

The biggest issue with machining ceramic insulation is dust control. Some materials can be cut wet, but that means long drying times before assembly. Most hi-temp insulation contains some silica, so dust control must keep airborne particulates down in the low parts-per-billion range.


P.S. Can you add the Dante Furnace to the "Jump to a project" menu?

Updated by Ben Barnett over 8 years ago

For a furnace that is opened when hot, a front-opening furnace is generally easier to use because the person opening the furnace is not directly exposed to the super-heated air exiting the furnace. Note that the infrared radiation will still ignite any flammable materials in close proximity. Here is a link to one source for kilns used for hobbies like ceramics or enameling:
Note particularly the Cress C1006 ($854) near the bottom of the page. For melting metals, a kiln recommended for enameling is best because it is designed to be opened when hot. Kilns for firing ceramics often have cautions against opening while hot due to uneven cooling of the internal structure. Link to the Cress C1006 Manual:

For industrial furnaces, you could start looking here:
They are considerably more expensive than hobby kilns.

The two sources that I have used for furnace insulation are:

I generally used Zircar "Uniform A1" board material as it was more uniform density and less likely to fall apart during machining.

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