Pyrolysis treatment of waste clay from lubricating oil production
润滑油废白土的热解处理

The effects of terminal pyrolysis temperature,heating rate and CaO addition on the pyrolysis products of waste clay from lubricating oil were studied by electric heating.It was found that there were obvious effects of terminal pyrolysis temperature on the quantities of gases and oils.Gases and oils increased with increasing terminal pyrolysis temperature,but their increasing rates increased slowly when it was above 600℃.When waste clay was pyrolized at 800℃ terminal pyrolysis temperature with 16℃/min heating rate and 0.5% CaO addition,the production of hydrogen-rich gases was 189.2 L/kg,and its main compositions were H2(27.97%)and CH4(41.64%).The percentage of oil content and heavy metallic ions dissolving-out of pyrolysis residue were below the standard values.The production rate and recovery rate of pyrolysis oil were 10.98% and 38.94%,respectively.And that pyrolysis oils were composed of gasoline(19.13%),diesel oil(31.35%) and heavy oil(49.52%).