Barites properties

Chem. Descrip. Fatty alcohol sulfate Uses Flotation agent for barite Properties Paste 45% act. 

Uses Surfactant for mining industry fluorspar collector selective tor barite Properties Liq. 30% act. 

Although numerous mud additives aid in obtaining the desired drilling fluid properties, water-based muds have three basic components water, reactive soHds, and inert soHds. The water forming the continuous phase may be fresh water, seawater, or salt water. The reactive soHds are composed of commercial clays, incorporated hydratable clays and shales from drilled formations, and polymeric materials, which may be suspended or dissolved in the water phase. SoHds, such as barite and hematite, are chemically inactive in most mud systems. Oil and synthetic muds contain, in addition, an organic Hquid as the continuous phase plus water as the discontinuous phase. 

Calcium—Silicon. Calcium—silicon and calcium—barium—siUcon are made in the submerged-arc electric furnace by carbon reduction of lime, sihca rock, and barites. Commercial calcium—silicon contains 28—32% calcium, 60—65% siUcon, and 3% iron (max). Barium-bearing alloys contains 16—20% calcium, 9—12% barium, and 53—59% sihcon. Calcium can also be added as an ahoy containing 10—13% calcium, 14—18% barium, 19—21% aluminum, and 38—40% shicon These ahoys are used to deoxidize and degasify steel. They produce complex calcium shicate inclusions that are minimally harm fill to physical properties and prevent the formation of alumina-type inclusions, a principal source of fatigue failure in highly stressed ahoy steels. As a sulfide former, they promote random distribution of sulfides, thereby minimizing chain-type inclusions. In cast iron, they are used as an inoculant. 

From disseminated ores contained in mineral lenses, the recovery of bastnaesite and monazite is accomplished using flotation. The flotation properties of bastnaesite and monazite are similar to the gangue minerals contained in the bastnaesite and monazite, such as calcite, barite, apatite, tourmaline, pyrochlore and others, which represent difficulties in selective flotation. However, in recent years, significant progress has been made in the flotation of both monazite and bastnaesite [2,3]. 

A large portion of the REOs are produced from monazite- and bastnaesite-containing ores. In the majority of cases, bastnaesite and monazite ores are relatively complex and contain gangue minerals (calcite, barite, fluorite and apatite) with similar flotation properties as the monazite and bastnaesite. 

Weslig is a lignon sulphonate with a molecular weight of about 20,000 and also contains ethylene oxide. Ethylene oxide serves the purpose of reducing the frothing properties of the Weslig and improves the Weslig depression efficiency, in particular, for barite. 

Because this ore was high in barite and fluorite, direct flotation of bastnaesite from the ore was not possible. It should be pointed out that fluorite has similar flotation properties as bastnaesite and depression of fluorite during bastnaesite flotation is difficult. 

Barex 210 resin, l 450t Barex 218 resin, l 450t Barex resins, 1 449-452 properties of, l 450t BArF anions, 16 95 bar gene, 13 360, 36 It Barge transport, 25 327 Barite, 3 343, 351, 352-355 17 691... 

Figures 4.31a,b represent narrow luminescence hnes detected in barite by time-resolved spectroscopy. Much weaker lines at 446 and 672 nm accompany the strongest one at 588 nm. They have a relatively short decay time of 5 ps and emphasized in the spectrum with short gate. Such a combination of spectral and kinetic properties is not suitable for any trivalent REE besides P j2 f9/2...

Properties Colorless, white, pale-blue or red, luster vitreous to pearly. Resembles barite. D 3.95, Mohs hardness 3-3.5. 

Fillers are used in these products to improve mechanical properties or impart flammability resistance. Fillers are frequently silane-treated to further improve mechanical properties. Fillers must have a low moisture (below 0.1%), a low absorption of resin, and are expected to impart thixotropic properties. There are special cases. For example, if peroxyketals are used as initiators, basic fillers have to be used because acidic fillers interfere with cure times and the shelf-life of the composition. Shape and particle size distribution must be considered in filler selection to impart the desired rheological properties. Calcium carbonate is the most popular filler but aluminum trihydrate, anhydrous calcium sulfate, and silica are also frequently used. Barite is well suited to this application, especially if acid... 

Hang, J.Z. et al., Electrokinetic properties of barite nanoparticles suspensions in different electrolyte media, 7. Mater. Sci., 42, 9611, 2007. 

Solids Control. The circulating drilling fluid is an open system to which solids are added both at the surface (bentonite and barite to control properties) and in the borehole from drilled formations. The drilled cuttings are removed from the drilling fluid on the surface by a... 

Flotation has been used for more than 100 years to separate sulphides, oxides and other salts from ores, as well as to obtain phosphates, barite, chromite and other materials. Up to 90% of copper, lead, nickel, zinc are extracted using flotation in the USA [152 - 153]. In Russia, flotation is widely used to additionally obtain apatite, barite and phosphates. Flotation of iron oxides is not used in practise yet, but the number of experiments carried out in this direction is rather large. The main physicochemical principles of flotation have been discussed above [59 -74]. Here, only some practical problems will be discussed. In [153], requirements are pointed out which apply to three-phase flotation foams, and the main components of the process are defined, i.e. surfactant - collector surfactant - frother activator, depressants, colligend, gangue. The peculiarities of flotation and foam separation in batch and continuous modes are outlined as well as the structure and properties of the main types of flotation agents described. As surfaces of the majority of mineral particles are hydrophilic in nature, hydrophobisation of particles is necessary for a selective separation. 

Separation of minerals is rather difficult when they contain cations similar in their properties, for example, barite and calcium carbonate. In the presence of the collector sodium oleate, nonspecific particle agglomeration is observed, which can be overcome using the modifier sodium lignosulfonate [155]. Under these conditions, selective agglomeration of barite particles was observed and satisfactory process parameters were achieved. 

Bastnaesite from Mountain Pass ore (hard-rock ore) is processed as follows. After comminution, the ground ore is subjected to hot-froth flotation. However, gangue minerals like calcite, barite or celestite may cause problems in flotation, because they have flotation properties similar to bastnaesite. For this, special treatment has been devised, consisting of six different (steam) conditioning steps... 

Garrett et al. (1979) also discovered that the commercial magnetite resembles barite in particle size and density and so it is normally added through the hopper like barite, and with this property, no abnormal rheological properties should occur from magnetite and none has ever been reported. 

The results of rheological and filtration properties are presented in Table 2 for all mud types. It is apparent from the results that a treated or untreated Itabirite mud systems has better rheological characteristics than a barite mud system (untreated or treated). This is due to the fewer inert solid particles in the itabirite mud system that cause less mechanical interaction and electro-chemical attraction between the active particles. With the addition of polymer at each concentration, lower PV and YP can be obtained with the Itabirite mud system than with barite. Therefore, the use of polymers In the Itabirite mud system were more compatible than in the barite mud. This advantage would enable the itabirite mud system to be tested with an even higher polymer concentration, overcoming the abrasion problem in the mud system. 

Itabirite mud system exhibited higher cumulative fluid loss volumes than barite mud system. It was observed that 0..5 Ibm/bbI concentration of DS or KXCD polymer for a large particle size of itabirite (between 74 and 125 microns), and 0.75 Ibm/bbI for small particle size of Itabirite (between 34-44 microns) were adequate to improve the filtration properties. 

Inert i- nort [L inert-, iners unskilled, idle, fr. in- 4- art-, ars skill] (1647) adj. The term apphed to various extended pigments such as asbestine, barites, silica, calcium sulfate, mica, talc, etc. In general, they have poor hiding power but they are inert from a chemical and physical standpoint. While they contribute some desirable properties to paint, they are primarily used to lower the cost. 

An extremely important example of the beneficial effects of fillers is the reinforcement of elastomers. The properties of elastomers can be enhanced by the addition of certain fillers to the rubber compound before vulcanization or cross-linking. Fillers for rubber can be divided into two classes inert fillers, such as clay, whiting, and barites, which may make the rubber mixture easier to handle before vulcanization but have little effect on its physical properties and reinforcing fillers, which do improve the physical properties. 

Kaolin is used only in small quantities in PR The anisotropic particle geometry of wollastonite and mica reinforces the pol)uner. The latter is applied more extensively in USA and Canada due to the closer location of mining facilities. Barite-filled PP has excellent vibration damping properties due to the high density of this filler. Wood flour filled PP is occasionally applied in the automotive industry for the preparation of door panels. Water absorption of this filler creates problems in processing and application. The most important characteristics of mineral fillers are collected in Table 2. 

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