CIEFF-CEULJI/ULBRA-2014-Parte 4
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Transcript of CIEFF-CEULJI/ULBRA-2014-Parte 4
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RISCOS QUÍMICOS
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NR 15; anexos 11, 12 e 13
Substâncias, compostos ou produtos organismo inalação, absorção ou ingestão
Materiais atividades ocupacionais ambiente processo: pulverização, fragmentação, emanações gasosas
Sólido, líquido ou gasoso
Exemplos...
Classificação
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Gases hidrogênio, nitrogênio, oxigênio...
Vapores de gasolina, de água...
Poeiras sílica, carvão, asbesto...
Fumos Pb (solda)
Névoas e neblinas de tinta
Fibras animal, vegetal, vidros e cerâmica
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Forma Efeitos
Gases
Vapores
Névoas
Aerodispersóides
...
• Poeiras
• Fumos metálicos
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POEIRAS
Sílica, carvão, asbesto...
Toda partícula sólida de qualquer tamanho ou origem, formada por trituração ou outra ruptura mecânica de um material original sólido, capaz de manter-se suspensa no ar
0,1-25 micrômetros de diâmetro (>7 micrômetros)
Classificação
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POEIRAS
Animal
Mineral
Vegetal
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POEIRAS
Sílica
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POEIRAS
Mineral
SiO2
Amorfa ou cristalizada quartzo, tridimita, cristobalita e trípoli
Pneumoconiose silicose
Sílica
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POEIRAS
Mineral com rigidez
quantidade na natureza rochas e areia
Indústria
Sílica
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POEIRAS
Mineração Explosivos Perfuração, corte e retirada de minérios Transporte, britagem, moagem, peneiramento e
ensacamento
Sílica
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POEIRAS
Cerâmica e vidro Operações de manuseio e preparação da massa Rebarbação, perfuração, torneamento e lixamento
de pegas secas Esmaltação por revolver Preparação de formas refratarias, britagem,
peneiramento, na carga de fornos, no corte de tijolos...
Sílica
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POEIRAS
Metalurgia, fundição e siderurgia Polimento e jateamento abrasivo com areia Operações de modelagem e desmoldagem com
areia Nas trocas, reparos e cortes de refratários
Sílica
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POEIRAS
Química Fabricação de tintas, cosméticos, produtos
farmacêuticos e inseticidas Produção polidores e abrasivos domésticos e
industriais Fabricação de cimentos...
Sílica
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POEIRAS
Construção civil Escavações de túneis e poços Operações de corte, furação e polimento de
blocos de pedra, granito e quartzo...
Sílica
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POEIRAS
Medidas de controle
Sílica
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POEIRAS
Medidas de controle
Identificação da existência do risco
Medidas de controle da dispersão Ventilação exaustora Enclausuramento Isolamento
Sílica
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Medidas de controle Matéria prima jateamento abrasivo
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Medidas de controle Mudança no processo
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Medidas de controle Umidificação
perfuratriz
esponjamento
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baias de armazenamento
esteira transportadora
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descarte
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Medidas de controle Limpeza
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Medidas de controle Manutenção
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Medidas de controle Sinalização e rotulagem
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Medidas de controle Monitoramento ambiental
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Medidas de controle EPI proteção respiratória • Operações eventuais • Existência de risco não controlado
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Medidas de controle Asseio pessoal
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Medidas de controle Exames médicos / amostragem química
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Medidas de controle Limiar o tempo de exposição
Treinamento
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POEIRAS
Amianto designação comercial genérica
Variedade fibrosa de 6 minerais
Flexibilidade e resistência tênsil, química, elétrica, térmica, tecido...
Serpentinas (amianto branco) e anfíbolas (amianto marrom, azul e outros)
Asbesto
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POEIRAS
Crisótilo mineral +comum asbesto
Telhas (85% do uso)
Revestimento de embreagens
Revestimentos e coberturas de edifícios
Gessos
Revestimentos e roupas à prova de fogo
Asbesto
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POEIRAS
Doenças causadas
Asbesto
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POEIRAS Carvão
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NÉVOA / NEBLINA
Partículas líquidas (gotículas - >0,5 micras/2-6 micrômetros) produzidas mecanicamente (processo spray/dispersão)
Partículas líquidas (gotículas – 0,01-10 m/<0,5 micras) geradas pela condensação de um estado gasoso (vapores), passagem rápida de ar nos líquidos ou desintegração de um estado líquido (ebulição) > difusão que os fumos
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FUMOS METÁLICOS
Partículas sólidas (0,01-0,5 micrômetros / 0,5 micras / normalmente <1 micrômetro) resultante do uso industrial de metais, da condensação de vapores ou volatização de metais fundidos; acompanhado de reação química
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GASES E VAPORES (moléculas no ar)
Substância no estado gasoso a 25 C e 760 mm/Hg; não se modificam; expansão indefinida; ex. GLP
Fase gasosa de substância líquida ou sólida a 25 C e 760 mm/Hg; podem se condensar