Inorganic Chemicals Industry >
Optimization of preparation of sludge/fly ash composite ceramsite filler materials by response surface methodology
Received date: 2021-12-14
Online published: 2022-09-22
The ceramsite filter media was fired by sludge，fly ash and waste glass as raw materials and supplemented with sodium silicate as binder.Based on single?factor experiment，the effect of preheating temperature，sintering temperature，sintering time and their interaction on the performance of composite ceramsite filter materials were investigated by using optimization with Box-Behnken response surface method.The results showed that the mathematical model established by the response surface had a high degree of fit.The interaction among the three factors of preheating temperature，sintering temperature and sintering time had significant effect on the water absorption rate.Sintering time was the most important affecting factor.Under the condition that the mass ratio of sludge，fly ash and waste glass was 4∶3∶3，supplemented by 3%（by mass fraction） binder，the preheating temperature was 500 ℃，the preheating time was 20 min，the sintering temperature was 1 133 ℃，and the sintering time was 23 min，the ceramsite filter material that met the requirements of CJ/T 299—2008 “artificial ceramsite filter material for water treatment”could be prepared.Compared with other ceramsite，sludge or fly ash composite ceramsite filter material had the advantages of low density and high?water absorption rate，which was suitable for water treatment filter material and artificial wetland filler.
Weicheng FANG , Xingxing CHENG , Changrong SUN . Optimization of preparation of sludge/fly ash composite ceramsite filler materials by response surface methodology[J]. Inorganic Chemicals Industry, 2022 , 54(9) : 119 -125 . DOI: 10.19964/j.issn.1006-4990.2021-0750
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