Method of utilizing polluted soil and industrial sludge to prepare ceramsite and ceramsite prepared thereby

A technology for polluted soil and industrial sludge, applied in clay products, applications, household appliances, etc., can solve problems such as insufficient treatment capacity of heavy metal polluted soil, achieve low environmental release risk of heavy metals, low heavy metal residue rate, and improve environmental safety. Effect
CN107056321AInactive Publication Date: 2017-08-18ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
Publication Date
2017-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method of utilizing polluted soil and industrial sludge to prepare ceramsite. The method includes following steps: (1), screening heavy metal polluted soil, mixing with industrial sludge after being smashed and screened, adding water to adjust water content, and granulating; (2), putting blank balls formed after granulation at the tail of a rotary kiln for moisture drying and removing, and transferring the blank balls into a rotary kiln body, and heating the blank balls at 600-800 DEG C for 50-80min to complete preheating of the blank balls; (3), transferring the blank balls into a high-temperature kiln head section after preheating is completed, roasting at 1300-1500 DEG C for 10-60min, and discharging and cooling. Existing ceramsite roasting kiln facilities are utilized, recycling feasibility of two major kinds of waste is realized after process improving, and two major pollutants including the heavy metal polluted soil and the industrial sludge can be eliminated and can be prepared to obtain ceramsite.
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Description

technical field

[0001] The invention belongs to the field of contaminated soil treatment and industrial solid waste treatment and utilization, and in particular relates to a method for preparing ceramsite by using polluted soil and industrial sludge and the prepared ceramsite. Background technique

[0002] my country's industrial industry has experienced long-term extensive development. During this process, due to poor management, hardware and technology, some enterprises have caused soil pollution at the original site of the factory. With the accelerated adjustment of my country's urban industrial structure in recent years, a large number of urban industrial enterprises have stopped production and relocated, and the problem of a large number of decommissioned polluted sites has attracted widespread attention from the society. Among the various types of polluted sites, heavy metal polluted sites are more difficult to remediate soil due to their large number, various types of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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