“I have recently been in correspondence with an Iranian researcher, Mostafa Aref haghi, who has chronicled a tradition in Iran of building adobe windmills. At first I thought that it was virtually impossible to build a windmill using adobe. But then as I studied the material that he sent I came to realize that yes, indeed, it is possible to build a windmill using adobe!
Basically the adobe structure provides support for a vertical wood-bladed mill that can be used to grind grain or put to other use. In some cases the adobe structure can also provide a channel for directing the wind toward the mill. I have posted a PDF file with many pictures and some description of these old structures that can be seen at http://greenhomebuilding.com/pdf/adobewindmills.pdf
Source: Green Home Building.com blog