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Cloruro De Calcio


Enviado por   •  15 de Enero de 2014  •  1.411 Palabras (6 Páginas)  •  558 Visitas

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calcium chloride versatility is related to its unique combination of physical properties:

moisture attraction and retention, high solubility, high heat of solution, and freezing point depresion of solutions.calcium chloride is most widely know for its deicing and dustcontrolling abilities

the largest market for calcium chloride (30 % of total production) is for deicing of roads, sidewalks, and parking lots (see table 5.)

calcium chloride melts ice at temperatures as low as -51ºC (-60ª F).

Because it liberates heat when exposed to moisture, ice is melted quickly, usually within 15- 3o minutes of application.

calcium chloride is also used in conjuntion with rock salt (sodium chloride) to enhance and sustain the effectiveness of the rock salt.

dust control accounts for ca. 25% of calcium chloride production. its hygroscopic and deliquescent properties make it ideal for this use.

calcium chloride absorbs moisture from the air and forms a solution that acts to coat dust paticles and bind them together, graetly reducing dusting. calcium chloride solutions are slow to evaporate because of their low vapor pressure and are, therefore, useful in the compaction of rod surfaces.

calcium chloride is used in the cement and concrete industries .

adition of 1 a 2% calcium chloride accelerates the setting time of concrete, resulting in earlier strength development.

calcium chloride should not be considered as an antifreeza in concreting, however, the addition of calcium chloride to concrete mixes poured at temperatures below 21ºc largely offsets the retarding effects of the lower temperatures.

because of their low freezing points, are used extensively as heat-transfer media in food procesing.

calcium chloride brine greatly increases the heat-transfer rate compared to chilled air or to a sodium chloride brine.

contact time between the brine and the various food molds is decreased, resulting in higher production rates.

calcium chloride is also used in the food industry to increase the firmness of fruits and vegatables and to prevent spoilage during processing.

in the petroleum and petrochemical industries calcium chloride is used as a desiccant for hydrocarbons.

it is also used in drilling fluids, packer fluids, completion fluids, and workover fluids in oil well drilling.

other uses for calcium chloride include:

adhesives - humectant

- lowers gel temperature

animal feed -source of calcium.

supplement

tractor tire weight -------------lowers freezing temperature of water

.---------improves traction by increasing tire weight

highway shoulder and base stabilization -----retains moisture which im proves compaction of soils.

freezeproofing ing of coal paper------lowers freezing point of residual water

----------increases web strength of corrugated media.

manufactured.

rubber manufacture ----coagulates latex emulsions

steel and pig iron manufacture ---eliminates alkalies that attack furnace refractory

wastewter treatment ---precipitates fluorides

---breaks oils emulsions

---densifies floc.

versatilidad de cloruro de calcio está relacionado con su combinación única de propiedades físicas:

congelación de atracción y retención de humedad, alta solubilidad, alta temperatura de la solución, sobre el estado anímico punto de solutions.calcium cloruro es el más ampliamente conocido por deshielo TIC dustcontrolling y habilidades

El mercado más grande para el cloruro de calcio (30% de la producción total) es para deshielo de carreteras, aceras y plazas de aparcamiento (véase el cuadro 5.)

El cloruro de calcio se derrite el hielo a temperaturas tan bajas como -51 º C (-60 ª F).

Debido a que liberan calor cuando se exponen a la humedad, el hielo se derrita rápidamente, generalmente en el plazo de 15 minutos - 3o de aplicación.

cloruro de calcio est aussi utilizados con sal de roca en Conjunta (cloruro de sodio) para mantener y mejorar la eficacia de la sal de roca.

Polvo

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