Papers by Keyword: Dry Process

Abstract: In ceramic tile manufacturing industry, the wet process including wet grinding and spray drying, is widely used for preparing granule. However, due to the high energy consumption for the water evaporation in spray dryer, it has become a major problem in wet process. In recent years, there have been vast amount of researches for developing of dry granulation processes in that granule size distributions cause quality problems in the final products.In this research, it is aimed to develop a new production system, called as Semi-Wet Process. The new system consists of a horizontal dryer, dry ball mill, separator and an additional high speed mixture. The raw-materials having low humidity are ground to the required fineness in dry size reduction process. The other components of recipe, that are prepared in conventional wet process, are mixed with the dry prepared powder in the mixing slurry tank. The addition of dry powder reduces the water ratio of final suspension. Hence, the natural gas consumption of the water evaporation in spray dryer is reduced substantially.The industrial application of the developed Semi Wet System was carried out in Kaleseramik Factory in Turkey, where 28% reduction on gas consumption has been achieved.

Abstract: Pure crumb rubber asphalt mixture using dry process has certain requirement of mineral gradation with the potential disadvantage of uneven mixing under the traditional temperature. In this paper the gradation design of asphalt mixture Sup-13 mixed with TOR and crumb rubber using dry process was studied with the Superpave design method, pavement performance of asphalt mixture including high temperature stability, cracking resistance at low temperature and water stability was tested in the experiment. Results show that Superpave design method is suitable for the research on the asphalt mixture of TOR and rubber, with getting moving stability 3682 times/mm, failure strain 2573.8με, residual stability 84.8% and the ratio of freeze-thaw splitting 80.1%. The performance is so good to meet the requirements for asphalt pavement performance.

Abstract: This paper presents a laboratory test to characterize the pavement performance of asphalt mixture containing polyolefin/ethylene copolymer modifier. The modifier is directly added into mixture like aggregates and is not necessary to modify the asphalt binder firstly, which is different with conventional modifier and is so-called dry process. Based on the aggregate grade of AC-13 mixture, the mechanical properties of polyolefin/ethylene copolymer modified hot mixtures asphalt (dry process) were studied by experimental tests, which include the high-temperature stability and water stability. The test results indicate that compared to the SBS asphalt mixture the dynamic stability and TSR improved 66% and 2.3% respectively, when the addition of RK300 is 0.3%.

Abstract: Effects of modified atmosphere packaging (MAP) on the contents of total acid, allicin and blue pigment and yellow pigment of “Laba” garlic were investigated after storage at 0 °C, 20 °C, 37 °C for 7 days. Results showed that, compared with 20 °C and 37 °C, 0°C had the most remarkable effect on maintaining quality parameters, which were 58.5 mg/g, 0,0654 mmol/L, 0.22, 0.87 for total acid, allicin, blue pigment, yellow pigment, respectively. This study suggested that 70 μm-thick polypropylene film storage bag with 0 °C showed the best effects in maintaining the quality of “Laba” garlic during storage for 7 days and extending the storage life.

Abstract: Water-insoluble chitin betainate was environmentally friendly prepared by esterifying chitin with betaine hydrochloride in the presence of dicyandiamide by dry process. The process achieved free-pollution and easy treatment. The chitin betainate holds potential as an adsorbent by the results of the adsorption experiments.

Abstract: Magnetostrictive composites were usually fabricated using a wet process. The settlement of particles in liquid polymers due to the gravity results in the inhomogeneous and low magnetostrictive properties. To solve the problem, magnetostrictive composites were prepared using a dry process, and their properties were tested in this paper. Measurement of magnetostriction on different positions along the length direction of the material indicates the magnetostrictive composites prepared by the dry process present uniform properties due to the uniform distribution of the active particles in the polymer matrix. The saturation magnetostriction and the maximum dynamic magnetostriction of the [1-3] Terfenol-D composites prepared in the study was 1005ppm and 4.08nm/A, respectively, which was larger than the [0-3] ones.

Abstract: By the use of a coaxial pulsed vacuum arc discharge deposition method (APD), we have developed the catalyst deposition system onto support powders or sheet under vacuum. In this letter, we introduce Pt catalysis processing for fuel cell and evaluation for the electrode property.

Abstract: In this study, the effect of water absorption on mechanical properties of hemp fiber reinforced green composite(HGC) was examined. Plain woven hemp fabric was used as reinforcement. Emulsion type biodegradable resin was used as matrix. The composite was made by compression molding method. Water absorption rate and the effect of the ratio on the mechanical properties were examined. Following results are obtained. The water absorption rate increased with an increase of absorption time. The water absorption rate had an equilibrium state within 30 days. The duration was not dependent on fiber content. In the case of that specimen was kept in water 182 days, the strength decreased 70% of the ultimate one. But in the case that the specimen has dry process after water absorption process, the strength recovered 57%. The recovery ratio is not dependent on water absorption time. The strength reduction rate after dry process is not dependent on fiber content. The strength of resin decreased 62%, and the strength of fiber decreased 13% by water absorption. So the strength reduction of the composite is due to the effect of matrix.

Abstract: To clarify the effects of parameters of porous ceramics form on the characteristics of composites fabricated by high-pressure infiltration, Alumina forms with different porosity (15~70vol %) and pore morphology were fabricated by Freeze and Dry Process and Partial Sintering Process. Alumina/aluminum composites were made by the squeeze casting. The composites contained the different volume fraction of aluminum depending on the initial porosity of the ceramics form. The coefficient of thermal expansion (CTE) and thermal conductivity of composites were measured. The results indicated clearly that variation of the structure of porous ceramics form fairly affected CTE but the effects on thermal conductivity were small.