Abstract
The cement industry has unique opportunities to address the issues of utilization of manmade raw materials and municipal waste. The problem of using alternative fuels in the technological process of cement production is usually due to their low calorie content. The above calculations show the possibility of using RDF fuel as part of a mixed fuel when it is burned under conditions of an increased oxygen content in the air. Reducing the volume of combustion products increases the temperature of the torch, which increases the productivity of the cement rotary kiln, mixed fuel can be used in both low – and high-temperature zones of cement kiln units with an optimal ratio of components. There are restrictions on increasing the concentration of oxygen in the air, due to a decrease in the actual combustion temperature of the fuel due to the reverse reactions of the decomposition of combustion products and violations of the high-speed modes of operation of suspension heat exchangers. In addition, an increase in oxygen in the air significantly reduces the thermal efficiency of the clinker cooler as a result of the increase in excess air volumes. The use of RDF fuel in the optimal ratio allows replacing up to 42 % of natural gas.
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