Occupational Diseases / / April 28, 2016
Zirconium - metal silver (from the group of rare metals), in powder capable to ignite.It forms a series of compounds: zirconia - white powder; zirconium chloride - whitish-pink powder, volatile hydrolyzed; fluorides of zirconium, of which the most important hexafluorozirconate potassium - a white crystalline powder, soluble in biological fluids better than water.
Zirconium and its compounds are widely used in ferrous and nonferrous metallurgy, production of heat-resistant, corrosion-resistant super-hard alloys, special grades of steel, nuclear, missile, electric vacuum technology and other.
MPC for Zirconium metal and insoluble compounds -6 mg /fluorozirconate m3 - 1 mg / m3.
Zirconium - a trace mineral.Various zirconium compound having unequal effect on the body.The metal zirconium and zirconium dioxide are insoluble in biological media, in the experiment do not provide acute toxic effect of aerosols by prolonged exposure have weakly pronounced fibrogenic action.The soluble zirconium salt
have employed in the extraction and enrichment of titanium and zirconium ores occur hypotension, mild anemia, a tendency to leukopenia, initial pneumoconiosis (at the experience of 5-6 years and more).
zirconium tetrachloride has a local irritating and cauterizing effect on the skin and mucous membranes (especially the eyes), due mainly HCl formation in the hydrolysis of chloride.
special toxicity has hexafluorozirconate potassium.In the experiment, it has a toxic, hepatotropic effect due mainly fluorine presence in the molecule, as well as local irritating and cauterizing action - conjunctivitis, blepharospasm.When applied to the skin - dry necrosis of soft tissues. Bolide and zirconium carbide experimentally induce mild fibrotic process and lungs.
When using zirconium chloride - elimination of manual operations, goggles, gloves.When using powdered metal zirconium - adoption of appropriate fire-fighting measures.Preliminary and periodic medical examinations.
31 May, 2016
31 May, 2016