Specifications, limestone

Purification of Carbide Acetylene. The purity of carbide acetylene depends largely on the quaUty of carbide employed and, to a much lesser degree, on the type of generator and its operation. Carbide quahty in turn is affected by the impurities in the raw materials used in carbide production, specifically, the purity of the metallurgical coke and the limestone from which the lime is produced. The nature and amounts of impurities in carbide acetylene are shown in Table 4. 

Specific gravities of pure and commercial limes and limestones are shown ... 

Thermal Properties. Because all limestone is converted to an oxide before fusion or melting occurs, the only melting point appHcable is that of quicklime. These values are 2570°C for CaO and 2800°C for MgO. Boiling point values for CaO are 2850°C and for MgO 3600°C. The mean specific heats for limestones and limes gradually ascend as temperatures increase from 0 to 1000°C. The ranges are as follows high calcium limestone, 0.19—0.26 dolomitic quicklime, 0.19—0.294 dolomitic limestone, 0.206—0.264 magnesium oxide, 0.199—0.303 and calcium oxide, 0.175—0.286. 

Talc is sold for use in a wide variety of appHcations, including paper (qv), ceramics (qv), roofing, paint (qv), plastics, mbber (qv), cosmetics (qv), pharmaceuticals (qv), adhesives (qv), sealants (qv), and animal feedstuffs (see Feeds and feed additives). In all of these appHcations it is a functional ingredient with specific beneficial properties. Talc is rarely used as a filler because it is much more expensive than alternative minerals such as limestone and clay. 

W1 is Bond work index based on 100 percent passing a 200-mesh sieve, is the sohds feed rate in kg/min, and S is weight percent solids in the feed. This represents experimental data for limestone, feldspar, sulfide ore, and quartz. The influence of Wl is believed to be due to its effect on amount of fines present in the mill. Parameters that did not affect are specific gravity of feed material, and feed size over the narrow range studied. 

Metal Oxide - Since metals are less electrophilic than silicon, metal oxide adsorbents show even stronger selectivity for polar molecules than do siliceous materials. The most commonly used metal oxide adsorbent is activated alumina, used primarily for gas drying. Occasionally, metal oxides find applications in specific chemisorption systems. For example, several processes are under development utilizing lime or limestone for removal of sulfur oxides from flue gases. Activated aluminas have surface areas in the range of 200 to 1,000 ftVft Average pore diameters range from about 30 to 80 A. 

Platten-gewebe, n. lamellar tissue, -glimmer, m. sheet mica, -gummi, n. plate rubber sheet rubber, -kaik, m. slab limestone, -kautschuk, n. plate rubber sheet rubber, -kondensator, m. (Elec.) plate condenser, -kultur, /. plate culture, -kupfer, n. sheet copper, -pulver, n. (Expl.) rolled powder, flake powder, -achale, /. flat dish, specif. Petri dish, -turm, m. plate column, plate tower, -zink, n. slab zinc, plattgedriickt, a. flat-pressed, flattened, plattieren, jj.t. plate clad. 

Stink-farbe, /. old weak tan liquor, -fluss, -flussspat, m. fetid fluor spar (bituminous fluorite), -harz, n. asafetida. -kalk, m. anthraconite (bituminous limestone), ohle, /. fetid coal, -mergel, m. fetid marl (bituminous marl), -ol, n. fetid oil, specif, animal oil. -quarz, m. fetid quartz (bituminous quartz), -raum, m. gas chamber, -raum-probe, /. gas-chamber test, -schiefer, m. fetid shale, -spat, m. = Stinkfluss. -stein. 

Undesirable solids are drilled cuttings and those solids sloughed into the borehole. They usually occur in all size ranges from colloidal to coarse. The specific gravity of commonly encountered drilled solids ranges from 2.35 (shale), through 2.65 (sand), 2.69 (limestone), to 2.85 (dolomite) see Table 4-57 [29]. 

Chemical food preservation, 12 85-86 Chemical formula, defined, 21 336 Chemical fossils, 18 571 Chemical gas scavengers, 12 77 Chemical gel stabilization, 23 71 Chemical-grade limestone, 15 27 Chemical-grade propylene, product specification for, 20 1111 Chemical hazards, 21 833-846... 

A number of environmental applications [3] have been performed in order to size characterize colloids collected in rivers (riverbome particles, SPM, and sediments), clay samples and ground limestone (from soils), coal particles, diesel soot particles (from combustion processes), or airborne particles in urban areas (from waste incinerators, vehicles, household-heating systems, and manufacturing). In many of these cases, not only the size but also the particle size distribution was important and thus, in conjunction with the traditional UV detector, specific detectors such as ETAAS, ICP-MS, ICP-AES were used [40] in order to obtain more detailed, more specific compositional information. 

Pyritic sulfur can be removed by froth flotation, which takes advaniage of the differences of specific gravity of the two types of sulfur. To be effective, the coal must be pulverized into particles in the micron region. The process can be enhanced by adding limestone, catalyst, und soda ash to the coal dust. After treatment, the coal is formed into briquettes for ease of handling by convenlional conveyors. 

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