Simple Homemade Forge Horn
First, let's figure out what the horn will look like. I clearly arranged all the bricks as they would be in the finished horn.
Blowing will be lateral. Oxygen will be brought into the chamber of the furnace by an iron pipe. On the one hand, it needs to be filed at 45 degrees, although I did not do that. We put it in the camera, too, at an angle. The photographs show how we will lay bricks with clay.
Prepare the clay
I kneaded it in a bucket of nine liters. Mix clay and sand in a ratio of 1: 1. Next, add clean water. Knead the clay to the next state. It is necessary to roll a small ball, put it on one palm, and the second start to press it down. Cracks should appear when it is squeezed in half. It should resemble consistency. ... Well, it does not matter what.
Then we grease all the joints of the bricks among themselves, all the inner and outer parts with abundant clay. So the heat will be stored for a long time in the chamber. Good grease clay joints of iron pipe with bricks. A brick that serves as the back wall can be left unattached.So it will be possible to move it aside and work with long blanks. Of the upper bricks I attached only extreme clay. So the horn can be used both open and closed.
Also, the pipe can be improved to regulate the air supply. In the middle, it can be cut and threaded on both sides. Now we screw in the part that in the horn, the sanitary tee with a tap, like this:
So, by opening the tap, we can adjust the air supply. But I scored on it.
A few words about the air supply
Of course, in this pipe something must drive the most delicious oxygen, which will heat the coals in the chamber to hellish temperatures. You can use blacksmith furs. Such that our ancestors used in the forge. But this is not the best option, you need at least a pair of furs to get the necessary temperature, and it would be nice to have an assistant who will tirelessly click on the furs.
Much more productive to use electric blowers. For example, a turbine for inflating mattresses. I used an old Soviet vacuum cleaner. He can even twist the hose from blowing to blowing, but it's broken.I had to fix the packet with adhesive tape from the side where the air is blown out.
A little bit about using the forge
I used it for forging and casting. It melts aluminum and other non-ferrous metals in seconds. It turned out to cast some details, using foam plastic molds in sand and clay molds. Melt aluminum cans in a special crucible. Further, the molten metal was cast into sand and gypsum forms.
It is well suited for forging knives or any small metal products. About the manufacture of knives from files it will be discussed in my next article.
One of the photos shows a heated forging, though, the color rendition is completely different. Due to the bright sun, it is impossible to determine the temperature of the workpiece by color. Therefore, earlier in the forge was twilight. Here is a video of the forge.
Here everything is very simple. The furnace works on coals, so you simply pour the coals into the inside and ignite them as in a brazier - using a highly inflammable liquid. Next, give the air. In a few minutes the horn will be heated up to 1000 degrees, and this is not the limit, and the heat will also persist for a long time in it.
Blacksmithing can be both an unusual hobby and a highly paid profession. Professional blacksmiths get very good money for their hard work!