Elaboration and Characterization of New Ceramic Material From Clay and Phosphogypsum

Abstract

Phosphogypsum (PG) generated from the phosphate beneficiation plant was investigated to be valued as raw material for ceramic materials (bricks). X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transformer Infra-Red spectroscopy (FTIR) and laser granulometer were used for the mineralogical, morphological, chemical and granulometric characterizations of raw materials. Firstly, the raw materials were ground, dried and mixed with various level phosphogypsum addition (from 0 to 50 percent by weight of clay). Secondly, the mixtures were spread out in a stainless steel mold while they were pressed using a hydraulic press to obtain compacted discs. Finally, the obtained materials were sintered in a programmable furnace. The study involved physical properties (density, porosity, and water absorption), chemical, thermal, structural and mechanical tests performed on ceramic materials. The obtained results showed that the ceramic with 40% of PG incorporation successfully satisfied the standard requirements. The increase in the percentage of PG contributing to decreasing the mechanical strength of the samples, but it is still higher than the standard limit. In addition, the thermal conductivity was decreased with the increase in the percentage of PG, which gives the prepared material the insulating property.

Characterization of clay deposit in the central region of Piauí for use in the ceramic industry

“…The difference between the percentages obtained in the PI and the classification is closely related to the granulometric distribution that was shown previously, so a good amount of the clay fraction is present (in case of the presented sample) and it provides greater strength of the products [23]. It should also be considered that high plasticity can hinder the processing/conformation of the clay, so to reduce plasticity, it may be necessary to incorporate some clay with low plasticity or deplasticizing materials, as was done in some previous works [12,13,[24][25][26]. Figure 2 shows the Winkler diagram for the clay sample, in which appropriate regions for the processing of clay ceramics products are identified according to the granulometry of the material used [27].…”

Investigation on the Mineralogical Phase of Ancient Brick Samples of Kathmandu Valley (Nepal) Using XRD and Ftir Analysis

“…Consequently, it can be said that all the analyzed archaeological and ancient bricks might be produced at the firing temperatures between 900° to 1000°C. The development of miner phases due to the impurities like hematite, calcite and dolomite so on in ceramic raw materials were reported a negative effect on the physico-sintering and mechanical properties of the fired clay bodies [30][31][32][33][34][35][36] . The XRD peak for hematite is mostly due to the impurity of iron oxide and no sign of the presence of calcite and dolomite phases in all eight archaeological and ancient clay brick samples indicates that the worsening of the mechanical properties of these brick samples generally expected mostly due to the presence of undesirable phase of hematite only in these brick samples.…”

Efeito de resíduos de gesso e de granito em produtos da indústria de cerâmica vermelha: revisão bibliográfica

“…Rakhila et al [55] realizou o desenvolvimento de um material cerâmico que une argila e fosfogesso (doado por indústria de fosfato e peneirado). Inicialmente foi realizada a caracterização das matérias primas, em seguida as mesmas foram misturadas com adição de fosfogesso em vários níveis (de 0 a 50% em peso de argila).…”