Patent ID: 8075686

Claim:
A method for reducing organic chlorine compounds in a cement clinker, comprising: passing crushed cement raw material comprising dust and an organic chlorine compound through an organic matter remover and heating said cement raw material in said organic matter remover during said passing, to remove said organic chlorine compound from said crushed cement raw material or to decompose said organic chlorine compound; after said passing, heating said crushed cement raw material where the organic chlorine compound has been removed in a first heater; depositing the crushed cement raw material from the first heater into a rotary kiln of a cement production facility; and introducing a gas generated during said passing that comprises said organic chlorine compound into a high-temperature portion of the cement production facility having an operating temperature of 800° C. or more, thereby decomposing said organic chlorine compound in said gas, wherein said high-temperature portion is at least one of a lower stage part of said first heater, a calcinatory, a posterior chamber of said rotary kiln, an anterior chamber of said rotary kiln, and a clinker cooler.