Abstract
Abstract This paper presents the results of industrial tests of low grade lignite combustion in the 500 t/day wet-process rotary cement kiln. For the use of pulverized lignite, the following process characteristics are determined: combustion process parameters, flue gas properties, and the influence of coal ash properties on clinker quality. Industrial tests have shown that it is possible to substitute 50–80% of the natural gas with pulverized low-grade lignite, while the output of the kiln, specific heat consumption, and the quality of cement clinker remain unchanged.
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