What problems should be paid attention to when building a cement barbecue oven?

The furnace can be built with refractory bricks and bonded with refractory cement, and the furnace can be made of refractory soil. Don't use ordinary cement, but use refractory cement or high temperature cement for masonry. Rock wool or aluminum silicate fiber wool can be wrapped or filled on the outside of the furnace lining, which can resist high temperature and has good heat preservation effect. Lightweight alumina fiber brick, which is Morgan brick commonly used in furnaces, can be used in the part where the furnace is in contact with open flames, and aluminum silicate fiber cotton with a thickness of 50mm can be stuffed outside. Under the condition of 600~800 degrees Celsius in the furnace, the surface temperature rise will not exceed 35 degrees Celsius.