sintered bauxite spheres process
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- sintered bauxite spheres process
rival commercially available sintered bauxite based materials with regard to strength, hardness, specific gravity, and permeability behavior according to industry-accepted testing protocols, such as ISO 13503.16,17 The work has been extended to manufacturing proppants from shale-based cuttings derived from the well-drilling process, as well as fer-
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Described herein are sintered spheres, obtained from red mud, comprising at least aluminium oxide, iron oxides, silicon oxide, and titanium oxide, characterized in that the roundness and the sphericity of the sintered spheres is higher than 0.6. Described is further a process for the production of sintered spheres, comprising the following steps: a) …
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The largest waste by-product generated in the Bayer bauxite refining process is bauxite residue, commonly called red mud. An enormous quantity of caustic red mud is generated worldwide every year, posing a very serious and alarming environmental and safety problem. The storage of red mud is a challenge for alumina refineries (Figure …
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Early work on falling particle receivers identified ceramic proppants, spherical sintered bauxite particles used in oil and gas production operations, as the best …
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Also, the value of Q sca,f /Q sca,b obtained with both the scatterometer and integrating sphere measurements is from 1.8 to 1.9 for all bauxite particles. Very good agreement is obtained for the two methods in terms of the ratio of forward to backward scattering efficiency factors for both absorbing particles and dielectric particles.
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It was found that morphology of the sintered grain is very much dependent on the impurity level. Mullite formed from bauxite-1 with low impurity is mostly equiaxed, whereas mullite developed from ...
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Plasma assisted novel production process of glass-ceramic spheres in the quaternary system CaO–SiO 2 –Al 2 O 3 –MgO. ... Spheres generated under the following parameters: ... sintered bauxite beads were injected into the furnace as an experimental material and heated up in flight. The particle heating characteristics were investigated ...
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Bauxite is the principal ore of aluminum. The first step in producing aluminum is to crush the bauxite and purify it using the Bayer Process. In the Bayer Process, the bauxite is washed in a hot solution of sodium hydroxide, which leaches aluminum from the bauxite. The aluminum is precipitated out of solution in the form of aluminum hydroxide ...
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Made available by U.S. Department of Energy Office of Scientific and Technical Information ...
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Spherical sintered-bauxite particles have high solar absorptance (>0.9) and resistance to abrasion and sintering at high temperatures and pressures [46], [48], [81]. Tests were performed that exposed the particles to high temperatures (up to 1000 °C) while falling through an hour-glass-like apparatus that rotated 180° continuously over ...
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The results indicated that the quality and size of alumina hardly changed after abrasion and high-temperature processes. Ho et al. [40] investigated the impacts of particle velocity on the abrasion of two different sintered bauxites (Carbo HSP 12/18, Sintered Bauxite 30/50). The tested results showed that the mass loss of the two particles is ...
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The proppant is usually sand, but resin-coated sand, ceramics, and sintered bauxite are sometimes used. Hydraulic fracturing is common in low-permeability formations. Hydraulic head: The distance between the respective elevations of the upstream water surface (headwater) above and the downstream surface water (tailwater) below a hydroelectric ...
به خواندن ادامه دهیدA process for producing high strength sintered bauxite spheres usable as fracture propping agents in oil or gas wells are produced by continuous spray-granulation of an aqueous binder-containing aluminous ore suspension to form granules which are subsequently sintered. Suitable starting materials include ores of high aluminum silicate …
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To develop his models, he considered spheres or cylinders, arranged in a simple cubic array, embedded in a continuous matrix. Rayleigh's model extends the range of applicability of Maxwell's model to a higher porosity range. One of the known models for the porous material effective thermal conductivity prediction is the Maxwell-Eucken model.
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Solutions for bonded abrasives that last. As their name implies, bonded abrasives contain grains that are bound together by agents such as binders, fillers or other forming agents into defined forms, typically a wheel, stone, or grinding segment to perform a grinding operation. These can, for example, be mounted on a tool for cutting or grinding operations or used …
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After the first industrial use of proppants took place in 1947 using silica (Montgomery and Smith 2010), many materials (walnut hulls, natural sands, glass, resin-coated sands, sintered bauxite and fused zircon) have been employed as proppant agents in geothermal and oil/gas extraction process (Liang et al. 2016). However, due to …
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The coating process was performed by high-energy, high-speed ... Sintered bauxite-type ceramic proppants, originally used in the fracking/oil drilling ... by spectrometry with an internal integrating sphere of 150 mm diameter (Lambda 950, Perkin Elmer, Hessen, Germany) according to the method described by Gobereit et al. [16]. ...
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The bauxite residue sinter leach process (BRSLP) is a potential method of recovering sodium hydroxide and alumina from bauxite residue. In this research, …
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Bauxite is reddish-brown, white, tan, and tan-yellow. They were formed by lateritization (see laterite) of various silicate rocks such as granite, gneiss, basalt, syenite and shale. Bauxite is the name for a mixture of similar minerals that contain hydrated aluminum oxides. Bauxite is a naturally occurring, heterogeneous ore composed chiefly of ...
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The bauxite residue sinter leach process (BRSLP) is a potential method of recovering sodium hydroxide and alumina from bauxite residue. In this research, bauxite residue …
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The sintering process has been used commercially in the processing of high silica bauxites and could be used effectively for the …
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A process for producing high strength sintered bauxite spheres usable as fracture propping agents in oil or gas wells are produced by continuous spray …
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High strength sintered bauxite spheres usable as fracture propping agents in oil or gas wells are produced by continuous spray-granulation of an aqueous binder-containing bauxite suspension to form granules which are subsequently sintered to high strength and high density spheres.
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Abstract of the disclosure: High strength sintered bauxite spheres usable as fracture propping agents in oil ox gas wells are produced by continuous spray-granulation of an aqueous binder-containing bauxite suspension to form granules which are subsequently sintered to high strength and high density spheres.
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This study focuses on investigating mechanical interaction and thermal properties of sintered bauxite and sand particles that are input to DEM models of heat transfer and storage systems. Direct measurements and calibration approaches were utilized together to obtain the mechanical interaction properties of particles.
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The sintered bauxite material exhibited a higher solar absorptance (0.94) than the fused zircon (0.74) for all conditions investigated. ... A process that was developed for the preparatlon of particles of thorium -uranium dicarbide is described. Granulated particles composed of powdered UO/sub 2/, ThO/sub 2/, and carbon were suspended in- a bed ...
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When the mixture of the high-silica bauxite and Na 2 CO 3 with mole ratio of Na 2 O/(Al 2 O 3 + SiO 2) of 1 was sintered at 950 °C for 30 min, diaspore and kaolinite were primarily converted into Na 1.95 Al 1.95 Si 0.05 O 4 and an amorphous phase, respectively. ... but it cannot economically process the bauxite with a mass ratio of …
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Introduction. Hydraulic fracturing is the process of injecting fluids into oil or gas bearing formations at high rates and pressures to generate fractures in the rocks (Fig. 1). The task of proppants, or propping agents, is to provide and maintain long term efficient conduit for production from the reservoir to the wellbore. Proppants are mixed ...
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As an advantagegranular materials, allow for high process temperatures in CSP systems (> 600°C) and can be used both as heat transfer and heat storage media, which ... For sintered bauxite, alumina, quatz sand and corundum, r batches with two different ... Values of 1.0 for perfectly round objects (spheres) and 1.25 for irregularly shaped ...
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Sphericity is defined as the ratio of the surface area of a sphere to the surface area of the particle. The sphericity is 1 for a sphere and is less than 1 for any particle that is not a sphere. ... Proppants are a key factor of the hydraulic fracturing process. ... Ceramic proppant agents include sintered-bauxite, intermediate-strength ...
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Patent: Process for the production of sintered bauxite spheres Process for the production of sintered bauxite spheres. Full Record; Other Related Research
به خواندن ادامه دهیدSpace-holders are like cores used in the casting process. They create voids in metal without the needs of gas injection and blowing agent. To create porous using space-holders, we can use a polymer , thermally decomposable material, clay pellets or hollow spheres made out polymer, glass, metal, ceramic or salts [19,20,21,22,23,24,25 ...
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Add to Mendeley. https://doi/10.1016/j.ceramint.2007.11.013 Get rights and content. Abstract. Bauxite residue, the principal waste from the Bayer process, was …
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Abrasive Bauxite Beads. Bauxite beads are manufactured to yield spherical sintered bauxite engineered to give extreme durability under all conditions. They are ultra-fine crystalline, high impact resistant spheres. …
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Sand is the most common proppant; however, it can generate an extremely high fines content. Resin coating of the grains enhances the performance of sand-based material forming CRCS (curable resin coated sand) or PRCS (pre-cured resin coated sand). Alternate proppant components include ceramics made from sintered bauxite or small …
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Abstract. Low-cost magnesium aluminate spinel ceramics were successfully synthesized from the minerals of magnesite (M) and bauxite (B) via the one-step sintering method. The effect of the ratio of bauxite to magnesite on the phase evolution, microstructure, as well as the mechanical properties was thoroughly investigated.
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A process according to claim 1 wherein said sintered bauxite is composed primarily of corundum and mullite. 4. A process according to claim 1 wherein said uncalcined natural bauxite fraction contains 30-50% gibbsite, 22-45% boehmite, and 16-24% kaolinite.
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1 Introduction 1.1 Overview of Bauxite Ore. As a residue of strong chemical weathering, bauxite is mainly composed of Al-oxyhydroxides, Fe-oxides/-oxyhydroxides and Ti-oxides (mainly TiO 2 phases) (Bárdossy, 1982, 1994; Bárdossy and Aleva, 1990; D'Argenio & Mindszenty, 1995; Retallack, 2010).Bauxite deposits can be classified into …
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