| 摘要 |
A new cement kiln and method of heating cement kiln feed is described which involves providing a plurality of circumferential, elongated, lifting vanes near the gas exit end of the kiln. The edge of the last row of lifters is within three feet of the end of the kiln chain system and the double rows of lifters occupy an area representing the upper 2 to 10 percent of the total kiln length. The lifters drop kiln feed through the kiln gases as the gases pass from the lower to the upper end of the kiln and heat is transferred from the gases to the solids. A considerable reduction in the kiln exit gas temperature is accomplished using this method of imparting heat to kiln feed and a reduction in the quantity of fuel needed to supply heat to the the kiln is also realized.
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