Study On The Properties And Rheological Behavior Of Mineral Raw Materials For Architecture Ceramics

China is the world’s largest producer of ceramic tiles,and its consumption of resources and energy remains high.Enterprises must supplement and update mineral raw materials in the production process.When using new raw materials,how to ensure the good fluidity of mineral tools with low moisture content is a difficult problem that architectural ceramic enterprises often encounter in actual production.Therefore,this paper studies the properties and differences in debonding of the mineral raw materials used in building ceramics.Use XRD,XRF,SEM,laser particle size analyzer and Zeta potential analyzer to characterize various properties of mineral raw materials.The rheological ability of the slurry is tested by a rotational rheometer,and the influence on the fluidity of the slurry and the degree of dissolving difficulty are explored,so as to provide guidelines for the production of slurry with low water content and good fluidity.First of all,the blank is mainly composed of kaolinite,quartz,feldspar,etc.,so relatively pure mineral raw materials are selected for research.The viscosity of kaolinite is highly sensitive to water content,and the rheological curve transitions from simple Newtonian fluid to complex plastic fluid with the decrease of water content.Quartz and feldspar both exhibit good fluidity at different water contents,and the rheological curve basically presents a simple linear relationship.Based on this,as the moisture content of the billet decreases,clay is the main mineral that causes the fluidity of the slurry to deteriorate.Simulation of kaolinite with different ion types,concentrations and p H values using kaolin.Among them,Ca²⁺has a greater influence on the viscosity of the slurry than Na⁺due to the amount of charge,the number of hydration molecules and characteristic adsorption.Lower ion concentration will thicken the hydration film on the surface of clay particles,while excess ions will compress the thickness of the hydration film.With the increase of acidity and alkalinity,the viscosity of the slurry decreases.When p H=4,it is close to the zero electric point of Longyan kaolin,and the slurry shows the lowest yield stress.The ion type,concentration and p H value in kaolin will all affect the de-gelation effect of sodium tripolyphosphate,and Ca²⁺and acidic conditions will significantly increase the viscosity of the slurry.Secondly,several kinds of kaolinite（Guangxi clay,Xiamen ball clay,Malay clay）and montmorillonite（Liaoning bentonite）minerals were selected to study the differences in properties,fluidity and de-gelation.The results show that mineral morphology,particle size,phase,p H value and Zeta potential have great influence on the fluidity of clay.Among the kaolinite minerals,the viscosity of Guangxi clay is most affected by water content and is the most difficult to unpeel.The main reasons are its fine particle size,high dispersion,high humus content,strong acidity,and low Zeta potential.The commonly used water glass,sodium tripolyphosphate and sodium polyacrylate were selected for de-gelation experiments.The results showed that inorganic and polymer water reducing agents had good effects on kaolinite minerals;The de-gelation effect of mineraloids is poor,and it will be more effective to use sodium polyacrylate for its degumming.Finally,the actual formula clay of an enterprise is studied,which is composed of clay minerals and barren minerals.The phase is quartz,kaolinite,muscovite,albite and potassium feldspar,etc.,does not contain montmorillonite minerals,the p H value is weakly alkaline,the Zeta potential is large,and the rheology is between clay minerals and barren minerals between.The results of degumming experiments show that the effect of sodium tripolyphosphate and sodium polyacrylate is obviously better than that of water glass,and the slurry with good fluidity can be obtained when the water content of the slurry is 33wt%.