Preparation Methods of Sludge Ceramsite

Sludge as the main raw material, add a certain amount of excipients, additives, after forming, decarburization and roasting made of a certain strength of light ceramic, can consume a large amount of dewatered sludge.

Sludge as the main raw material, add acertain amount of excipients, additives, after forming, decarburization androasting made of a certain strength of light ceramic, can consume a largeamount of dewatered sludge, the advantage is that with a good processing andpreparation of pollution mud ceramic system technology, the sludge has beeninnocuous, reduction and resource utilization, the proportion of clay in theceramsite system to reduce the use of traditional craft a large number ofceramic, is conducive to the protection of arable land, sludge ceramsite theproportion of clay used in the system is reduced. Sludge, coal cinder, shalesoil, expanding agent, aluminum oxide and additives are mixed to produce sludgeceramsite. The performance of sludge ceramsite is widely used.

Specifically includes the following steps:

(1) Sewage treatment plant sludge collectedin the reservoir, the sludge moisture content of 99% or more, through thesludge pump into the sludge dewatering machine and sludge dryer, the sludgewater rate reduced to 55 ~ 60%;

(2) The dried sludge is then put into amixing device. The mixing ratio of the materials in the mixing device is asfollows: the proportion of sludge is 30-40%, the proportion of shale is 35-45%,the proportion of clay is 5-10% 3 to 8 percent of cinder, 1 to 2 percent ofbulking agent, 1 to 2 percent of aluminum oxide, and 1 to 2 percent ofadditives. After being uniformly stirred by a material mixing device, thematerial is formed on a drum forming machine;

(3) Forming screen sieve the size of theappropriate molding materials, molding materials roasting kiln firing, themolding material in the sludge have a certain calorific value, and addpulverized coal, etc., after passing the fuel mixer. The fuel molding machineis compressed into a fuel rod, the fuel rod is put into a roasting kiln forcombustion, the sludge in the roasting kiln is controlled at 1100 DEG C to 1400DEG C, the shaped material is sintered into sludge ceramsite, and get qualifiedsludge ceramic stored in ceramsite finished warehouse.