Preparation Of Ceramic Tiles With Tin Tailings

The large-scale discharge of industrial solid waste,on the one hand,causes serious damage to the ecological environment and endangers human health.On the other hand,under the contradiction of rapid socioeconomic development and lack of natural resources,the discharge of industrial solid waste is a big waste of resources.In recent years,with the continuous expansion and acceleration of the scale of mining,the stock of industrial solid waste has also increased rapidly.Chinese government and the Guangdong provincial government have successively introduced a series of policy plans to increase the control of industrial solid waste.In response to the call of national policy,the comprehensive utilization of large-scale industrial solid waste resources has become one of the hot topics of scientific research in related fields in recent years.Tin ore reserves are abundant in China,but a large amount of tailings produced during the tin ore mining process has become a major problem facing industrial development.Aiming at the problem of difficult and high cost treatment of a tin ore tailing in Xinyi City,Guangdong Province,this paper has carried out research on the preparation of ceramic tiles using tin ore tailings.The main contents include pretreatment of tin ore tailings,and using pretreated tin ore tailings to replace some of the raw materials for the green body.Through the preparation of formulations and process optimization studies,ceramic tile samples that meet the requirements are obtained with tin ore tailings.These research works provide a technical reference to improve the comprehensive utilization of tin ore tailings resources.In this thesis,the raw materials of tin ore tailings were tested.The particle size,chemical composition and phase composition of tin ore tailings were studied by laser particle size analyzer,chemical analysis,XRD and other methods.The results show that the grain size of the tailings is fine,D₅₀ is 24.5μm.The main chemical composition is SiO₂ and Al₂O₃,the main mineral composition is quartz（SiO₂）,a small amount of topaz（Al₂SiO₄（FOH）₂）,sericite(KAl₂(AlSi₃O₁₀))（OH）₂)and so on.The amount of radioactive and heavy metal dissolution meets the requirements of national standards.The tin ore tailings is a siliceous material mainly composed of quartz crystal with high crystallinity,and can be used as a raw material for a ceramic body.Aiming at the problem of high iron content in tin ore tailings,the use of multi-stage magnetic separation has reduced the iron content in tin ore tailings by more than 50%.Through research on tin ore tailings preparation technology,the optimum forming pressure of the ceramic body from tin ore tailings was determined to be 30KN,and the holding time at the sintering temperature was 40min.The effects of the addition amount of tin ore tailings and sintering temperature on the section characteristics,water absorption,failure strength,fracture modulus,and shrinkage of ceramic bodies were determined,and the tin ore tailings ceramic body ratio was determined to be tin ore tailings 40-50%,kaolin 30%,potassium feldspar 10%,wollastonite 10%,bentonite 5%,alumina sand 5%and the sintering temperature is1220-1240℃.After determining the formula and process for preparing the ceramic tile body from tin ore tailings,the adaptability of the body and the glaze was further studied.A commercial frit was used as the tin ore tailings body glaze.The optimal glaze formulation was determined by orthogonal tests as 708^#frit 80%,105^#C frit 8.9%,103^#frit 11.1%,and B₂O₃ 2.0%.The formula of the glaze and the green body expansion coefficient curve is close,the green body expansion coefficient is slightly larger than the glaze surface,and has good green glaze adaptability.Through the above research,this thesis explores the preparation of ceramic tiles using tin ore tailings,which provides a new resource comprehensive utilization method for the resource utilization of tin ore tailings,which can reduce the consumption of high-quality ceramic raw materials.Turn waste into treasure,and realize the sustainable development of the environment and economic common tin resource mining industry.