Papers by Keyword: Ceramic Filter

Abstract: Crude petroleum filters were prepared from low-cost materials based on kaolin powder and combustible materials as palm fronds powder which acts as pore creating agent. The samples with different content (10, 20, 30,40) wt% of palm fronds powder (P.F) were fabricated using a dry pressing method and fired at 1100 °C. Crude petroleum filters were characterized by X-ray diffraction (XRD), energy dispersive analysis (EDS) and Scanning electron microscopy (SEM). Physical properties (linear shrinkage, apparent porosity, water absorption, apparent density), mechanical properties (compressive strength and diametrical strength ) and Metallic Content.

Abstract: Some organic pollutants change the color, smell, and other characteristics of water leaving it undesirable for use. However, other organic pollutants do not change the physical properties of the water, yet, they make the water non-useful. This study was carried out to determine the characteristics of petroleum contaminated water and how it can be purified using economical filters for possible reuse in rural areas of the Niger Delta, of Nigeria. The filters were made from rice husk ash, and white clay, as main materials, while calcium carbonate and poly (propylene carbonate) were used as binders and pore former. The water samples were tested for conductivity, turbidity, pH, heavy metals, and total hydrocarbon contents. The results showed a significant decrease in the amount of petroleum/organic pollutants present in the water sample before purification. The filter candle made using poly (propylene carbonate) as a binder was found to be the most efficient in removing organic pollutants, but it was not very effective in the removal of heavy metals and also, the pH of the filtrate became more acidic. Filtrates from other filters, however, had pH in an acceptable range. Dodecanoic acid and hexadecanoic acid were found to be removed from the polluted water using the filters.

Abstract: The work presents theoretical grounds for the process of refining molten steel from liquid non-metallic inclusions, using the method of filtration with ceramic filters - the thermodynamic precondition to the absorption of liquid non-metallic inclusions on the surface of a ceramic filter.

Abstract: Common phenomenon observed during steel filtration in laboratory conditions is the increased number non-metallic inclusions. These are the smallest inclusions in the Ferret diameter range from 0.5 to 6 μm. This phenomenon concerns only the number of inclusions. The analysis of literature shows that there is no explanation of this in the previous research, for example [1, 3]. Therefore, this paper attempts to explain the important relationship that was so far overlooked.

Abstract: The research on the process of steel filtration from non-metallic inclusions is currently entering the last phase of industrial experiments. Their positive effects confirm the previous theoretical assumptions and laboratory tests. The application of steel filtration as a permanent technological operation in the process of steel casting will remarkably improve its metallurgic purity. An additional advantage will be diminishing the probability of covering the outlet nozzle of a tundish. This paper presents an outline of the experiment results mentioned above.

Abstract: In this study, different compositions based on rice husk carbon and kaolinitic clay aimed at obtaining ceramic filter were studied. Three compositions of 40, 60 and 80% rice husk of the total mass were prepared. The specimens were uniaxially compressed in rectangular shape at pressure of 28 MPa and were sintered at temperatures of 1100oC, 1150oC and 1200oC for 1 h. The sintered samples were characterized according to standard technique for linear shrinkage, water absorption, apparent porosity and flexural strength. Scanning Electron Microscopy (SEM) was also performed to check the average pore size, and X-Ray Diffraction (XRD) to verify existing crystalline phases, chemical analysis and mercury porosimetry. The X-ray diffraction results showed mostly alpha quartz peaks and mullite after sintering. Mercury porosimetry showed porosity of 44.33% and average pore size of approximately 8.33 μm for sample with 60% rice husk sintered at 1200°C.

Abstract: We propose in this publication the introduction of new, additional definition describing the multiple orifice ceramic filters used in research works on the liquid steel filtrations, calling this the filter slenderness ratio. In order to confirm the theoretical assumptions we have performed a series of the laboratory scale experiments (for the filter slenderness ratio S_F - 1.67 to S_F - 8.36). The influence of the filter slenderness on the filtration process efficiency has been determined through variations in quantities and surface shares of the non-metallic phase in the filtrated steel in relation to the non-filtered steel. We present also the results of researches on the separating surfaces between the liquid steel and the ceramic filter material, which in form of photos and scanning microscope microanalyses are put together in the publication.

Abstract: This paper developed a high efficiency, simple to use and reliable, strong practicability of model 6120 diesel particulate filter regeneration control pulse inverse blow system. The pulse counter blowing regeneration test, and post-processing of particles back down to do the further research. The experimental results show that this device can wall honeycomb ceramic filter for filtering and counter blowing regeneration test and research.

Abstract: A gas-particle separation system was established to study the filtration performance where twelve ceramic filters were divided into four groups. Filters in the same group will be cleaned by pulse back-flow at once. The pressure distribution and variation during filtration and pulse back-flow washing in four group filter and along filter length was measured. The main pressure drop occurs across the filter porous wall. The pressure at filter cavity decreases from the close end to open end of the candle filter. The gas velocity magnitude inside the filter system during filtration process is generally relatively low inside the vessel. The velocity increases as the gas passes across the filter walls and enters the outlet of the filter tube.

Abstract: A gas-particle separation system was established to study the filtration performance where twelve ceramic filters were divided into four groups. Filters in same group will be cleaned by pulse back-flow at one time. The pressure distribution and variation during filtration and pulse back-flow washing in filter cavity and along filter length was measured. The main pressure drop occurs across the filter porous wall. The pressure at filter cavity decreases from the close end to open end of the candle filter. The gas velocity inside the filter system is generally relatively low in the vessel during filtration process.