| abstract |
PROBLEM TO BE SOLVED: Even if chlorine, heavy metal that easily forms chloride, and heavy metal that is difficult to form chloride are contained in the raw material waste, they are removed with high efficiency and high quality A method for producing a cement raw material is provided. SOLUTION: A waste containing chlorine and heavy metal (including a compound form) is heated at a temperature of 1000 ° C. or higher and lower than the melting point of the waste to easily form a chloride among heavy metals. Is reduced to volatilization, and among the heavy metals, hardly chlorinated heavy metals that are difficult to form chlorides are reduced and reduced by reduction treatment. [Selection figure] None |