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Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Reusing waste is essential for the sustainability of the planet. Among the waste, we highlight agricultural limestone classified granulometrically as filler. The present work tested pharmaceutical, food and inorganic binders, capable of producing briquettes that withstood at least 75 drops of 1.2 m and a minimum dissolution time in water at 25 °C of 8 h, presenting a lower cost (in dollars per gram) of the binder. The objective is that this briquette produced with limestone filler and binder has the possibility of being used as organomineral fertilizer. The most promising binder was xanthan gum, which produced briquettes capable of withstanding up to 300 drops of 1.2 m, 11.67 h of dissolution in water at 25 °C, at a cost of US$ 0.078/g. [ABSTRACT FROM AUTHOR]

Much research has been carried out to encourage the use of renewable energy as well as the use of biofuels. Dependence on non-renewable sources of energy, such as fossil fuels - natural gas, oil, coal - has generated many concerns in recent years. Considering this perspective, the present study aimed at the production of a sustainable solid fuel - briquette - from a biomass with great availability in the Brazilian northeast, the mango. It is important to point out that although this fruit is highly consumed in the food and cooking sectors, it is not fully utilized, with parts that are almost always not used, and the endocarp is the most appropriate. The raw material passed through the following processes: drying, removal of the almond, grinding, characterization and compaction. The compaction process of the biomass studied was the briquetting, where a pressure of approximately 7.5 tons was used in the Marcon MPH-15 hydraulic press, with a rest time of 5 minutes. The parameters analyzed for the raw material characterization were: moisture (M), volatile materials (VM), ashes (A) and fixed carbon (FC) and superior calorification power (SCP).The averages found for the properties mentioned in relation to the biomass characterization are as follows: 10.00% for M, 87.307% for VM, 1.78% for A, 12.70% for FC and 4078.39 kcal / kg for SCP. The value obtained for D was 0.87g/cm³ and 4081.28 kcal / kg for the average SCP after the production of briquettes. [ABSTRACT FROM AUTHOR]

Copyright of Brazilian Journal of Applied Technology for Agricultural Science / Revista Brasileira de Tecnologia Aplicada nas Ciências Agrárias is the property of Brazilian Journal of Applied Technology for Agricultural Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Mechanical wood processing is an important generator of lignocellulose wastes, which are normally discarded. If done incorrectly, serious environmental damage ensues. Due to environmental requirement, sectorial firms are interested in investing in residues, such as sawdust, wood chips and wood powder, for the manufacture of briquettes. Current paper identifies the motive used by a wood processing firm to reuse residues in its production process for the production of briquettes, coupled to factors that impair or facilitate the process. Method comprises a study of multiple cases. Two firms specialized in timber processing and in the manufacture of briquettes (B1 and B2) and two others who failed to do so (M1 and M2) are discussed. Results show that the main stimuli for briquette manufacture are the correct reuse of wastes, complying with legislation, with profits higher than their mere sale. The main impairments are high seasonality of the business and scanty information of the consuming market with regard to the advantages and benefits of briquettes. These sectors do not receive any fiscal benefits from the Brazilian government. Further, availability of residues and low humidity should be underscored since the acquisition of the residues from other companies, transport and drying exigencies increase costs. [ABSTRACT FROM AUTHOR]

Among the various sources for energy production , plant biomass has great potential for growth in coming years. The objective of this study was to evaluation the physical , chemical and energetic properties of some agricultural biomass planted (elephant grass and vertiver grass) ; biomass available in surface water bodies (macrophyte) and resulting biomass of forest holdings (real palm and carnauba straw) , to production of briquettes in order to use this solid fuel in structural red ceramics in the baixo-açu region in Rio Grande do Norte . The experimental design was completely randomized (CRD) with 3 replications for each species investigated. Totaling 15 experimental plots (5 biomasses X 3 repetitions). Superior Carorific Power and densities of different compositions ( blends ) of elephant grass and carnauba straw were also analyzed . The results show that the briquettes plant derived biomass as carnauba straw and elephant grass , have great potential for use in thermal power generation in existing ceramic kilns in the region and that the biomass can be used in the manufacture of briquettes , both individually, as in mixed blends of different compositions , in order to maintain the manufacture of briquettes throughout the growing season with a greater regularity of physical and thermal characteristics. [ABSTRACT FROM AUTHOR]

Electric Arc Furnace Dust (EAFD) is a solid waste generated by the production of steel through the Electric Arc Furnace. This waste is labeled dangerous, which motivates studies aiming its recycling. Experiments were made to study a pyrometallurgical process for the recycling of the dust, using the insertion of dust briquettes in molten pig iron in three temperatures. In the briquettes, there were made additions of calcium fluoride in four different concentrations. This paper has the objective to characterize the dust that results from this process, verifying the influence of the temperature and the concentration of calcium fluoride in the briquette in the morphology and chemical composition of the new dust, determining the optimal conditions for the recovery of the zinc content of the dust. This newly generated dust was analyzed in an Scanning Electronic Microscope, used to capture micrographs and chemical composition by EDS. The micrographs show that the temperature and the calcium fluoride concentration interfere in the way the dust particles agglomerate. Chemical analysis points that the higher zinc recuperation occurrs in the experiments at 1500°C with 7% addition of calcium fluoride. [ABSTRACT FROM AUTHOR]

This research aims to study the process of incorporation of the mass in final hot metal and volatilization mass contained in the electric arc furnace dust (EAFD), by addition in hot metal at a temperature of 1,400°C; 1,450°C and 1,500°C altering experimental conditions such as the percentage of EAFD to be added and the percentage of silicon in hot metal. Previously, the EAFD was characterized using techniques of chemical analysis and size analysis. After characterization, the EAFD to be added to the hot metal was agglomerated in the form of briquettes. The achievement of fusion experiments in laboratory scale was placed in a vertical tubular furnace with temperature control. A flow of inert gas (argon) was maintained inside the furnace during the experiments. The result of the sample EAFD volatilized shows that there is an increase in the zinc concentration when compared with the concentration of zinc present in EAFD "as received". [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi is the property of Revista Brasileira de Engenharia Agricola e Ambiental and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This research aimed to evaluate briquettes made from coffee husk, eucalyptus sawdust and maize harvesting residues, and the influence of post compaction interval on some properties of the briquettes. After oven drying of the biomass, the briquettes were produced in a laboratory briquetting machine at 120 ºC and 15 MPa. Bulk density and heating value of the fresh biomass were analyzed. After compaction, influence of time on moisture content, volumetric expansion an bulk density of the briquettes was analyzed. From the results, it was observed that milled coffee husk had the highest mean value of bulk density. There was no statistical difference for higher heating value among the biomass analyzed. The effect of pos compaction interval was significant on moisture content based on dry mass and bulk density for all briquettes produced. The briquettes produced from maize harvesting residues had high volumetric expansion. Considering tensile strength by diametric compression, coffee husk briquettes were more resistant. The results highlight the potential of energetic use of briquettes obtained by compaction of coffee husks. [ABSTRACT FROM AUTHOR]

This study aimed to produce and evaluating the briquettes made from residues of plant biomass and test different times and temperatures. The material utilized was composed of wood processing residues (wood shaving and sawdust), coffee bean parchment and coffee tree stem, beam stem and pod, soybean stem and pod, rice husk, corn leaf, stem, straw and cob and sugar cane straw and bagasse. Briquetting was performed at a pressure of 150 Bar. Different times were tested for briquetting sawdust from wood and different temperatures for rice husk and parchment coffee. For evaluation of the briquettes quality, the apparent relative density, compression resistance and combustion index were determined. The results indicated that the briquetting time and temperature interfered in the mechanical resistance of the briquettes. The best pressing time was of eight minutes and the temperature of 125 °C. The briquettes produced from rice husk presented higher density and high mechanical density. The highest combustion index was found for the bean pod briquettes. [ABSTRACT FROM AUTHOR]

This paper presents the results obtained with the production of briquettes from the steel grit found in the residue of ornamental rocks. The grit recovered by magnetic separation was characterized by titrimetric analysis, EDS (Electron Dispersive Spectroscopy) and X-ray diffraction for the analysis of iron concentration in the residue. The size and distribution of particles were obtained by the granulometric analysis method and scanning electron microscopy (SEM). The process resulted in a concentrate containing 93% metallic iron. The maximum load before fracture of the green briquettes was 1.02kN and of the dry briquettes was 3.59kN. [ABSTRACT FROM AUTHOR]