Process Study on Co-processing of Fluorine-containing Sludge in Cement Kilns
REN Mingzheng
Abstract：With the rapid advancement of industrial modernization and urbanization in China,the demand for efficient,safe,and environmentally friendly disposal of fluorine-containing sludge has become increasingly urgent.This study explores the feasibility and technical advantages of co-processing fluorine-containing sludge in cement kilns.Taking a 4 500t/d new dry-process cement kiln of a company as an example,a technical analysis was conducted,and a co-disposal process scheme of"pretreatment-metering-blending-kiln incineration"was designed.Research indicates that this process achieves reduction and harmless disposal of fluorine-containing sludge while simultaneously solidifying heavy metals,suppressing acidic substance emissions,and avoiding secondary pollution.In practical operation,when fluoride-containing sludge is added at a ratio of 0.5%～1.5%of raw materials,the coal consumption can be reduced by 1.0～2.0kg per ton of clinker.The 3d and 28d compressive strengths of clinker are increased by approximately 2.61%and 1.38%,respectively,with a slight increase in output.The emissions of fluorine and chlorine meet the requirements of national standards,achieving both environmental and economic benefits.
Keywords：co-disposal in cement kilnsfluorine-containing sludgeharmless disposalresource utilizationcoal saving and consumption reduction
Publication Date：2026-03-25
Online Publishing Date：2026-04-01(First online date of this platform, not the publication date of the document)
Pages：4( 37-40 )