Method of producing furnace carbon black

DETAILED DESCRIPTION OF THE INVENTION The invention is explained in more detail below in two embodiments with reference made to two advantageous reactor designs shown in the drawings.
FIG.
1 shows a longitudinal section through a reactor of the invention with combustion chamber and a constriction element which is taperingly conical on its forward end and cylindrical on its rearward (downstream) side.
FIG.
2 shows a longitudinal section through a modified reactor of the invention with combustion chamber and a constriction element which is taperingly conical on its forward end and opens out conically on its downstream side.
FIG.
3 shows a section through the reactor of FIG.
1 along line A--A.
FIG.
4 shows a longitudinal section through the tip of the gas lance for burnable gas in the combustion chamber of FIG.
3.
FIG.
5 shows a section through the tip of the gas lance of FIG.
4 along line B--B.
The carbon black reactor shown in FIG.
1 comprises an externally cylindrical part (1) constituting the overall tubular reactor with a total length of, for example, approximately 4.
85 m, which has connected to it a combustion chamber (2) which can also be externally of a tubular configuration The combustion chamber (2) is laterally oriented to the main axis of the reactor, and is, for example, approximately 2.
40 m long.
For example, both tubular parts can have an outer diameter of almost 1 meter.
These dimensions are illustrative and can be varied.
The carbon black reactor (1) is jacketed internally with a first layer (11) consisting of a conventional insulating compound followed on the inside thereof by a second layer which is a highly fire-resistant conventional ceramic layer (12).
These substances are well known in the art.
The carbon black reactor is divided into three sections or zones (3), (4) and (5).
The first reactor section or zone (3) is fitted with a closure plate (6) on its forward or front side which is equipped coincident with the reactor axis with a stuffing box (7) for receiving the oil injection lance (8)