Magnetite densities

FBRROUS-PBRRIC OXIDE Molecular weight 231.55 System cubic a - 0.837 [MAGNETITE) Density 5100 5200 Z-8 ... 

Dense fillers are used when heft, weight, or sound/ vibration damping is required. Heft is the perception of quality associated with products that feel substantial in the hand. Dense formulations are used in washing machine counterweights to reduce vibration. Formulations include iron slag in polypropylene or epoxy. Dense fillers include barium sulfate (density 45 g cm ), magnetite (density 5.0 g-cm ), micaceous iron oxide (density 5.0 g cm ), and metals (density 8-20 g-cm ). 

Zaire, Norway, and the United States (14). It also occurs with calcite, dolomite, apatite, magnetite, and some siUcates. The density of pyrochlore is ca 4.0—4.4 g/cm. The tantalum content usually is low, ca 0.1—0.3% on a metal basis. 

Magnetite Anodes of cast magnetite are now available. The anodes are produced as a hollow cylinder closed at one end (typically 60 mm diameter X 720 mm length). The method of cable connection is relatively difficult and requires the inner surface of the casting to be copper plated. At a current density of 75 Am consumption rates in seawater of less than 1 -5g/Ay are claimed. 

NOTE For any boiler, the maximum recommended tolerance for deposit thickness can be related to a weight of deposit per unit area clearly, the weight will vary dependent on the density of the deposit. Typically, deposit densities vary between 2.3 and 5.7 g/cm3. The densities of calcite and magnetite (which are two common mineral components of deposits) are 2.71 and 5.17 g/cm3, respectively. Table 4.2 assumes an average deposit density of 3.5 g/cm3. 

All deposits contain various ratios of scale and corrosion products, but often one material predominates, such as calcite or magnetite. These materials have different densities and thermal factors that influence the allowable deposit thickness or weight per unit area before cleaning becomes necessary. Practical allowances usually are between the limitations for each of these two materials. These allowances may be perhaps 50 to 100 mg/cm2 of surface area for lower pressure boilers and 25 to 50 mg/cm2 of surface area for higher pressure boilers. (For a more precise allowance, see the information below.)... 

Weighting agents (Table 10-10) are added to increase the density of the cement. They are typically used to combat high bottom-hole pressures. Common additives are powdered iron, ferromat, powdered magnetite, and barite. Hematite ean be used to increase the density of a mixture up to 2200 kg/m (19 Ib/gal). Hematite requires the addition of some water. 

Density separation processes exploit the differences in densities (p) of the particles to be separated. Fly ash is comprised primarily of two components aluminosilicate ash particles (p 2.1-2.4g/cm3) and unbumed carbon particles (p 1.8-2.0 g/cm3) with minor amounts of iron-rich spinel, commonly referred to as magnetite (p 3.0-4.5 g/cm3). Under ideal conditions, particles can be efficiently separated based on differences in particle densities alone. However, in continuous density separation processes, particle size differences induce separation inefficiencies that is, smaller, high-density particles behave similarly to larger, low-density particles. For this reason, narrowing the size... 

The mineral magnetite is an iron oxide ore that has a density of 5.20 g/cm3. At high temperature, magnetite reacts with carbon monoxide to yield iron metal and carbon dioxide. When 2.660 g of magnetite is allowed to react with sufficient carbon monoxide, the CO2 product is found to have a volume of 1.136 L at 298 K and 751 mm Hg pressure. 

Dense-media separation coal-cleaning method based on density separation, using a heavy-media suspension of fine particles of magnetite, sand, or clay. Dense medium dense slurry formed by the suspension of heavy particles in... 

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