Kilns
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Efeitos de adições de Cr2O3, NiO e ZnO sobre a formação do clínquer Portland e de adições de Al2O3 e Fe2O3 sobre a decomposição de seu composto majoritário
The co-processing of residues in cement kilns is in current days ones of the main solutions adopted for the final disposal of industrial residues. Part of this work has for objective to determine the effect of additions of Cr2O3, NiO and ZnO on the formation of main composites of the Portland cement clinker, aiming at to the co-processing of industrial resid
Publicado em: 2005
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14. AnÃlise dinÃmica de um forno rotativo piloto contÃnuo para produÃÃo de gesso beta com GLP
Direct contact rotary kilns are widely used equipments with many industrial applications. The evaluation of the residence-time of the particles on these reactors is fundamental in the development of controlled and optimized systems. In the present work, a technique to measure the residence-time distribution (RTD) was developed in a rotary kiln of 5,45m long
Publicado em: 2005
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15. Appropriate technology and techniques for the sustainable development: the case of the ceramic industry of russians-Ce / Tecnologias e tÃcnicas apropriadas para o desenvolvimento sustentÃvel: o caso da indÃstria cerÃmica de Russas-Ce
The red tile industry of Cearà state is of enormous socio-economic importance in terms of income generation, employment opportunities and supply of products with prices which are accessible to the civil construction sector. This contributes towards improvement of quality of life in alI regions of the state. On the other hand, the aforementioned industrial s
Publicado em: 2004
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16. Co-incineração e co-processamento de residuos industriais perigosos em fornos de clinquer : investigação no maior polo produtor de cimento do pais, região metropolitana de Belo Horizonte, MG, sobre os riscos ambientais, e propostas para segurança quimica
This thesis presents the results of the research realized in the years 1998 to 2002 about the principal technological, energetic, territorial and environmental aspects related with the hazardous industrial wastes processing in the c1inker kilns of cement plants. The analysis considered this activity a complex system with risks and uncertainly, because occur,
Publicado em: 2003
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17. Utilização de finos de carvão em fornos de calcinação como combustivel alternativo em plantas siderurgicas integradas
Nonrenewable energetic sources include essentially oil, natural gas and coal, the later having estimated worldwide reserves for more than 250 after the exhaustion of the other sources. The price policy for natural gas in Brazil has made attractive its substitution as a complementary source in steel plants by coal itself, whose prices are more stable. In this
Publicado em: 2002
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18. Modelagem e simulação do efeito de parede na transmissão de calor em um forno rotativo utilizado na produção de gesso beta
The rotating kiln used for plaster attainment beta (CaSO 4 . O,5H 20), from the calcination of the crude gypsum ore (CaSO 4 . 2H 20), present as main advantages in relation to the toa much types the production of a plaster more uniform, better thermal efficiency and easiness of automation. However, these ovens had had origin in adaptations of the kilns of ma
Publicado em: 2001
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19. Co-processed Clinker: Integrated Technology Product for the Cement Industry Sustainability and Competitiveness / Clínquer Coprocessado: Produto de Tecnologia Integrada para Sustentabilidade e Competitividade da Indústria de Cimento
In August 2001, in Brazil, there were seven cement plants with and an increasing number of others on the way to get the permit to co-processing, i.e. burning industrial wastes in their kilns as substitutes for fossil fuels. For over five years now the Companhia de Cimento Ribeirão Grande has counted on partial substitution of a blend of different waste stre
Publicado em: 2001
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20. Avaliação de um forno intermitente de ceramica vermelha usando bagaço de cana como combustivel
In this work the evaluation of a ceramic inverted flame intermittent kiln with total substitution of firewood by in nature sugar cane bagasse (50 % of moisture h.b.) is presented. In this kiln is burned only bagasse, differently from other ones tested by the IPT (Institute of technological research), in which in the initial stage firewood is burned and bagas
Publicado em: 1996
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21. O uso do carvão vegetal nos Pólos Guseiros: implicações sociais, ambientais e econômicas / The use of charcoal pig iron at the Poles: social, environmental and economic
The aim of this work is to discuss implications technological, environmentally and social limitations of the pig-iron´s production using charcoal. Through technical papers, technical visits to research centers and interview with experts, a data basis was collected to produce this work. The analysis of data showed that: the continuity of pig-iron making depe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/1995
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22. Analise energetica de plantas de produção de cimento Portland
This work presents an energetic analysis of the production processes of Portland Cement, based in the evaluation of the efficiency through the second law of thermodynamics and the concepts of rational efficiency and thermoeconomy. The characteristics of the raw materiaIs, the reactions of their compounds in the clinker manufacturing, and the fuels used are d
Publicado em: 1994
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23. Tremorgenic mycotoxins from Aspergillus fumigatus as a possible occupational health problem in sawmills.
Wood-trimmers' disease, generally called extrinsic allergic alveolitis, which affects workers in sawmills, is thought to be caused by fungal diaspores. The importance of Aspergillus fumigatus on the surface of wood dried in kilns is accentuated by its ability to produce tremorgenic mycotoxins. Eight strains of A. fumigatus from five different sawmills were i
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24. Hazard proximities of childhood cancers in Great Britain from 1953-80.
STUDY OBJECTIVES: Firstly, to examine relationships between the birth and death addresses of children dying from leukaemia and cancer in Great Britain, and the sites of potential environmental hazards; and secondly to measure relative case densities close to, and at increasing distances from, different hazard types. DESIGN: Home address postcodes (PCs) and t