Appeal No. 2005-0657
Application No. 10/136,984
According to appellants, the invention is directed to a
method of producing cement clinker in a rotary kiln which adds
primary feedstock material into the kiln at a feed end and then
introduces a secondary stream of metallurgical slag into the kiln
through kiln dust infeed ports situated at a mid-kiln location
2
(Brief, page 2).1 Claim 1 is reproduced below:
1. A method of producing cement clinker using an elongated
rotary kiln having a feed end and a downwardly tilted outlet end
with a heater situated generally adjacent to the outlet end, and
kiln dust infeed ports situated downstream of said feed end at a
mid kiln location, the method comprising the steps of:
a) directing heat from the heater through the kiln and
generally toward the feed end;
b) introducing a stream of primary cement feedstock
material into the kiln at the feed end so that the
cement feedstock material travels toward the heater and
the outlet end while becoming calcined and heated to
clinker-producing temperatures; and
c) introducing a secondary feedstock of fragmentary
metallurgical slag into the kiln through said kiln dust
infeed ports so that the metallurgical slag and the
1
1All reference to and citation from the Brief refers to the
Amended Brief dated Oct. 23, 2003.
2
2We note that “limestone feedstock” as recited in step (c)
of claim 1 on appeal lacks antecedent basis in the preceding
portion of the claim (see the primary “cement” feedstock in step
(b)). In the event of further or continuing prosecution before
the examiner, the examiner and appellants should correct this
error.
2
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