How to build a clay refractory kiln?

With a little practice, you'll soon be using your homemade kiln to fire your own pots and other clay creations.
1.On a level, bare patch of ground a safe distance from buildings and trees, lay out a single layer of bricks to form a foundation about 2 to 3 feet square.
2.Add a single row of bricks on top of the foundation layer. These rows should connect to form a complete perimeter with open space inside it. Leave gaps of approximately 1/4 inch between the bricks to let air flow into the kiln.
3.Add multiple layers of perimeter bricks atop the first, again leaving 1/4-inch gaps between the bricks in each row. The idea is to create a hollow brick box, which will be the body of your kiln. The height of your kiln can vary based on your own preference, but somewhere between 2 and 3 feet is typical.
4.Arrange some small rocks on the top layer of perimeter bricks to support the kiln lid while allowing air to flow through.
5.Place a sheet of steel or iron atop the rocks to serve as a kiln lid. You will need to remove the lid to fill the kiln with pottery and fuel, but it should remain in place while the kiln is firing.

Also we can use clay brick machine to make. A small clay fire kiln is surprisingly simple to make. All you need is a good quantity of bricks and a sturdy steel or iron sheet for a lid, and you can put together a personal pottery kiln capable of producing remarkably professional results.