The paper presents a review of emissions of main gaseous pollutants (including acidic constituents), some organic compounds (including dioxins and furans), particulates and heavy metals from cement kilns burning waste fuels.

A widely employed method to reduce the cost of cement production is the substitution of traditional fuels used in cement kilns with alternative and waste-derived fuels. Cement industry offers the most acceptable method of waste (especially hazardous waste) thermal treatment and disposal at much lower cost than commercial incinerators. Characteristic for cement kilns high temperatures and long residence time of exhaust gas ensure almost complete destruction of organic compounds contained in waste. Destruction and removal efficiency of the most persistent substances is at least 99.99 %. In addition, acidic gas constituents react to a high degree with the alkaline raw meal and are retained in the clinker or discharged as a less toxic substances. Trace metals introduced into the process almost entirely are bound in the clinker or dust discharged from the kiln. Using of flue gas dedusting and returning of the collected dust to the kiln system feed cause minimal emission of dust and toxic heavy metals included in particulate matters.

English title: Waste incineration in the process connected with cement clinker production - air pollutant emission problem.