| 摘要 |
<p>1510392 Garbage disposal; cement manufacture ASSOCIATED PORTLAND CEMENT MFRS Ltd 19 Jan 1977 [19 Jan 1976] 01949/76 Headings C1H and C1K In a process similar to that of Specification 1,405,294, Portland cement is made by employing at least one rotary kiln supplied with calcareous and argillaceous materials at one end and fired with fuel supplied at the other end with initially combustion-supporting gas which passes through the kiln; in which process waste matter other than a fuel is incinerated in a zone external to the rotary kiln to yield a gaseous incombustible product and a bottom ash product; said gaseous product from said zone is incorporated in effluent gas from the process while in contact with calcareous material employed in the process; at least a portion of said ash product is added to said calcareous and argillaceous materials and chemically combined therewith in the firing of said materials by means of said fuel to form Portland cement clinker in the rotary kiln; and the resultant clinker is subsequently ground to standard Portland cement.</p> |
