NOVELTY - Forming pyrolyzed biocarbon involves providing carbonizer (28) circuit for thermal modification of pyrolyzable organic materials (12); pyrolyzing advancing predetermined feedstock segments where a gradient of pyrolyzing feedstock is generated and liberates a vapor mixture containing at least combustible volatiles and tars (34); and recirculating, in the pyrolyzing stage, the vapor mixture at predetermined feedstock segments within the pyrolyzing stage for at least one of thermal energy exchange and formation of secondary charcoal from the vapor mixture to the predetermined segments.    USE - For forming pyrolyzed biocarbon (claimed) which is used as fuel and reactant in the refining of metals.    ADVANTAGE - The method facilitates user manipulation of rate of advancement of the feedstock through the circuit, selective collation of volatiles from pyrolyzing feedstock, selective exposure of predetermined feedstock segments to collated volatiles as well as thermal recovery and redistribution as desired by the user.    DETAILED DESCRIPTION - Forming a pyrolyzed biocarbon involves providing a carbonizer (28) circuit for thermal modification of pyrolyzable organic materials (12), the carbonizer circuit having a pyrolyzing stage in it; pyrolyzing advancing predetermined feedstock segments where a gradient of pyrolyzing feedstock is generated and liberates a vapor mixture containing at least combustible volatiles and tars (34); and recirculating, in the pyrolyzing stage, the vapor mixture at predetermined feedstock segments within the pyrolyzing stage for at least one of thermal energy exchange and formation of secondary charcoal from the vapor mixture to the predetermined segments. The method further involves selectively recovering the volatiles released at a segment; and selectively injecting recovered volatiles at a segment for affecting the composition of formed biocarbon. The pyrolyzed biocarbon comprises primary char. INDEPENDENT CLAIMS are included for the following:    (1) combining drying and cooling operations with thermal energy recovery in a pyrolyzing process involving providing a carbonizer circuit having a drying stage, pyrolyzing stage and cooling stage, the pyrolyzing stage including pyrolyzing organic materials to generate biocarbon and exhaust gas containing combustible volatiles and tars; combining at least a portion of the exhaust gas with air to form a combustible mixture; igniting the mixture to form a purified hot gas stream; the drying stage involves circulating at least a portion of the purified hot gas stream into direct contact with the entering pyrolyzable organic materials to augment drying of the pyrolyzable organic materials and generating a high humidity dryer exhaust stream; condensing a portion of the high humidity dryer exhaust stream by heat removal; the cooling stage involves providing condensate from the dryer stage to the cooling stage; and introducing the condensate into the cooling stage in a manner to cool hot biocarbon sufficiently to allow safe discharge from the carbonizer circuit; and    (2) forming a homogenous pyrolyzed product, involving providing a carbonizer circuit for thermal modification of pyrolyzable organic materials, the carbonizer circuit having a pyrolyzing stage in it for transforming the entering pyrolyzable organic materials into thermally modified biocarbon; advancing dried feedstock in individual segments through the pyrolyzing stage; thermally modifying advancing dried feedstock segments where a gradient of pyrolyzed feedstock is generated from the individual segments, each segment having a discrete vapor mixture containing at least volatiles and tars, each the discrete vapor mixture having a discrete temperature range; collating each the vapor mixture into at least one vapor mixture; providing thermal control of the collated vapor mixtures to form uniform streams at desired temperatures by heat exchange or selectively introducing air into the vapor mixtures to facilitate oxidation of at least some of the advancing feedstock and concurrent generation of heat in it; recirculating, in the pyrolyzing stage, the uniform stream at predetermined feedstock segments within the carbonizer circuit for exposure to the predetermined segments, where each the predetermined segment is exposed to the uniform stream to form a homogeneous product.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic illustration of the heat and mass integration flows for the composite carbonizer circuit.    Pyrolyzable organic material (12)    Blower (16)    Carbonizer (28)    Tars (34)    Biocarbon product (50)