Slag fibers

For example, in bulk appHcations as thermal insulation, synthetic mineral fibers (glass or slag fibers) have adequately replaced natural asbestos fibers. In sprayed insulation coatings, asbestos fibers have been replaced, for example, by vermicuhte. As replacement for asbestos textiles, clothing made from aramid fibers or aluminized glass fibers is being offered (see High PERFORMANCE FIBERS). 

The replacement of asbestos fibers by other fibrous materials has raised similar health issues in relation to substitute materials. However, since lung cancer has a latency period of approximately 25 years, and since the fiber exposure levels in contemporary industries is far lower than those which prevailed half a century ago, the epidemiological data on most substitutes is insufficient. A possible exception is slag fibers for which several studies on worker populations are available over extended periods (44) some results show a substantial increase in lung cancer occurrence. Consequentiy, the toxicity of asbestos substitute fibers remains a subject of active investigation. 

Rock wool is manufactured from sedimentary or magmatic rocks (e.g. clay, marl, basalt and in particular diabase) with small quantities of additives e.g. lime and dolomite. Slag fibers, produced from slags from metallurgical processes, e.g. blast furnace slags, with added mineral raw materials such as lime, dolomite, quartz or clay, are only of minor commercial importance. 

Glass fibers Rock Fibers Slag fibers Refractory ceramic Ubers... 

Water-cooled cupola furnaces several meters high and with shafts up to 1 m wide are used for the manufacture of rock and slag fibers. The raw materials are added alternately with coke. Metallic iron is formed from the iron-containing raw material and has to be regularly drawn off. 

Cascade centrifugal process used for manufacture of rock and slag fibers... 

Includes mineral fiber emissions from facilities manufacturing or processing glass, rock, or slag fibers (or other mineral derived fibers) of average diameter 1... 

The steel (qv) iadustry is also an extremely large user of fluorspar which is added to slag to make it more reactive. Smaller amounts are also used ia the aluminum, ceramic, brick, cement, glass fiber, and foundry iadustries. 

The seal must also resist the vibrations from the explosions of internal combustion in the engine, chassis and wheel vibrations, and even potholes in the road. This seal must resist strong chemicals (anti freeze, anti-rust agents, radiator stop-leak and sealant chemicals, gasoline and lubricant residuals), and also solid particles (rust, iron slag, minerals, asbestos fibers, and silica from the engine casting mold). In spite of all this, the mechanical seal on the water pump of your car can run 7, 10, even 15 years without problems. 

Mineral wool A generic term for mineral fibers of a woolly consistency normally made from molten glass, rock or slag. 

MMVF are synthetic fibers with glasslike structures. The term usually refers to silicate-based glass fibers, because these compositions form the largest volume of fibers produced. However, in addition to fiberglass and fused silica (Si02), there are other amorphous fibers used in commerce alumina (AI2O3) and silica combinations, rock and slag wool, as well as fibers with nonsilicate compositions such as carbon. Many of these amorphous fibers have proprietary names. 

Man-made mineral fibers Glass wool (fiberglass) mineral wool (slag, rock wool). Inhalation. Irritation of upper respiratory tract, skin. No ties to lung cancers, lung fibrosis. 

Eastes W., Potter R. M., and Hadley J. G. (2000b) Estimating rock and slag wool fiber dissolution rate from composition. Inhalat. Toxicol. 12, 1127—1139. 

Thin fibers 2 to 10 pm in diameter and with an average length of ca. 15 mm are obtained by the cascade centrifugal process, widely used for the production of rock and slag wools. In this process the melt flows onto one of three to four rotors with horizontal axes. From there the melt is transferred with increasing speed to the casing... 

Use Manufacture of chemicals, condensation reactions, catalyst in making acetate fibers. Analysis of minerals, slags, and fluxes determination of arsenic in metals separation of polonium from tellurium fungicide, germicide. 

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