A method for preparing lightweight ceramsite by using oil sludge and solid waste as a resource

Abstract

The invention relates to a method for preparing lightweight ceramsite by utilizing recycled oily sludge and solid wastes, and provides a method for preparing the lightweight ceramsite by directly utilizing the recycled oily sludge and solid wastes without needing any additive in the preparation process. The method comprises the following steps: (1) carrying out chemical conditioning and centrifugal dehydration reduction treatment on the oily sludge to enable the water content to be less than or equal to 80%; (2) mixing the treated oily sludge with at least one solid waste in crushed coal gasification, coal liquefaction and coal oil co-processing residue, granulating, and calcining, wherein particle sizes of the crushed solid wastes are less than or equal to 10 meshes; (3) after calcination, cooling the mixture to 60-80 DEG C step by step at the cooling rate of 10-20 DEG C to obtain the lightweight microporous ceramsite. The method provided by the invention is simple in treatment process, does not need any additive and realizes resource utilization of the oily sludge and the solid wastes.

Description

Technical field

[0001] The invention belongs to the field of processing containing sludge, and particularly relates to a method for preparing light ceramsite by co-resource of oil sludge and solid waste. Background technique

[0002] Oily sludge is a kind of stable colloidal system composed of organic matter such as petroleum and water, silt, etc. The organic matter contains heavy crude oil, semi-finished residual oil and refined oil, as well as a large amount of oily thick ring aromatic hydrocarbons and harmful microorganisms. It is harmful to the human body and the environment. It has been listed as a solid hazardous waste (HW08) in my country, and it must be effectively treated and harmless before it can be discharged. At present, the existing methods of treating oily sludge in China can be summarized as follows: incineration, coking, landfilling, land cultivation, solvent extraction, comprehensive utilization of oily sludge, solidification, chemical demulsification and biologi...