Working principle 

modern hoffman kiln

Heating process: input the baskets into the furnace-->heat the furnace to 100-120mins--> stop heating when the temperature up to 300-330 and there are CH4&C2H4 effecting.

Carbonizing processing: normally it takes 8-12hs; during the stage, the material should be pyrolysed, hence need more heating;

Cooling process: after carbonization, taking the inner basket out and then let it cool in natural. It takes usually 80-10hs to cool;

Heating Recycled: after taking the baskets out, another one should be put in, we could recycle the heating resource to carbonizing. 

Furnace structure 

modern hoffman kiln

One main furnace with three inner baskets

Main furnace Includes heating room, furnace body and heat-keeping layer.

Inner basket: resistance thermal steel and sealing cover.

Fume extracion tube: during the carbonizing process, there will be lots of smoke which can be burning; the smoke can return to the furnace through tube air blast carbonization.

What’s material could be carbonized?

modern hoffman kiln

How about the quality of the charcoal?

modern hoffman kiln

All the charcoal samples could be sent in FREE for test, once achieve your requirement and let’s talk more.

How to operate the whole line?

modern hoffman kiln modern hoffman kiln

What’s the quality warranty and after sales service?

We make sure of 2years quality warranty of the quality and an extra set of spare parts should be sent in free when shipping the machine; Also, our engineer could be able to service oversea for both installing and training.

machinery to make carbon wooden