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A Review of Recent Research on Catalytic Biomass …

2021-11-7 · Direct catalytic upgrading of biomass-derived fast pyrolysis vapors can occur in different process configurations, under either inert or hydrogen-containing atmospheres. This review summarizes the myriad of different catalysts studied and benchmarks their deoxygenation performance by also taking into account the resulting decrease in bio-oil yield compared to a thermal pyrolysis oil. Generally ...

Variety structure and synthetic production process of ...

2020-11-12 · Variety structure and synthetic production process of aluminum-silicon homogenizing material Nov 12, 2020. Variety structure of aluminum-silicon homogenizing material: The aluminum-silicon homogenizing material is based on natural raw materials such as scorch gemstone, kaolin, high alumina bauxite and industrial alumina as the main raw materials.

Geochemical Modeling of Water-Rock-Proppant …

2011-1-22 · flow-through testing with sintered bauxite between sandstone at temperatures between 93 and 287oC (Weaver et al., 2009). These loses were partially attributed to geochemical reactions of the fluid, proppant, and formation rock. McLin et al. (2010) and Brinton et al. (2011) show dissolution of proppant and precipitation of minerals

IOP Conference Series: Materials Science and …

Bauxite is crushed and purified using the Bayer process to produce aluminium. Bauxite is commonly used as abrasive made by crushing it to form powder. Sintered bauxite is also used as oil-field propellent. The whole process of aluminium production from raw bauxite requires enormous amount …

Microstructure and fracture mechanism of low density ...

2018-2-15 · Fracture mechanism. 1. Introduction. Proppants, required in hydraulic fracturing operations in the oil or gas industry, consist of millimetre-sized ceramic particles used to "prop open" rock cracks to increase oil well production [1], [2]. To be effective they should be …

The Development of Direct Absorption and Storage Media …

2015-8-1 · Spherical sintered bauxite particles between 200 μm and 700 μm in diameter have been shown to be effective in the direct absorption and storage of concentrated solar energy.These particles are commercially available in large quantities and exhibit as-received solar weighted absorptance (α s) greater than 0.90, which gradually degrades with extended heating in air at 700 °C and above.

A comprehensive review on proppant technologies

2017-3-8 · Review article A comprehensive review on proppant technologies Feng Liang a, *, Mohammed Sayed a, Ghaithan A. Al-Muntasheri a, Frank F. Chang b, Leiming Li a a Aramco Services Company, Aramco Research Center e Houston, 16300 Park Row, Houston, TX 77084, USA b Saudi Aramco, P.O. Box 5614, Dhahran, 31311, Saudi Arabia article info Article history: Received 1 October …

SiC-whisker-reinforced high-alumina refractories, part I ...

The specimen was made using bauxite with variations of average particle sizes of 5-10 μm, 10-15 μm, and 15-20 μm. SiC whisker was added to each ... [Show full abstract] variation varying from 2 ...

The Effect of Sintering Temperature on Phase Evolution …

wt% bauxite and the samples sintered at 1400°C possessed the lowest breakage ratio of 2.2% under 52 MPa closed pressure. Zhao et al.3 fabricated ceramic proppants with 93 wt% calcined bauxite, which exhibited better performance with a breakage ratio of 3.22% under 52 MPa closed pressure sintered at 1355 °C. However, the expense of natural bauxite

3D printing of high-strength water-soluble salt cores via ...

2021-10-8 · Core materials with high strength and excellent collapsibility are important for the manufacture of hollow composite structure castings. In this work, a novel technology to fabricate water-soluble Na2SO4-NaCl-based salt cores with high strength and low cost by material extrusion (ME) was reported. The water-soluble Na2SO4 and NaCl powders were used as the matrix materials, and the …

Sintered Aluminum Carbon Sliding Plate Manufacture and ...

Our firm insists all along the quality policy of "product high quality is base of organization survival; consumer fulfillment could be the staring point and ending of an company; persistent improvement is eternal pursuit of staff" along with the consistent purpose of "reputation 1st, purchaser first" for Sintered Aluminum Carbon Sliding Plate, Sintered Aluminum-carbon Sliding Plate, Sintered ...

Steam injection well gravel pack material of sintered bauxite

Sintered bauxite is available in that range of sizes. The pack material should have a roundness and sphericity greater than 0.6, a specific gravity greater than 0.1 and a compressive strength greater than 2000 psi. Sintered Bauxite. Sintered bauxite is commercially available from The Norton Company, the Carborundum Company and others.

sbm lead the to new areas of sand making machine ...

2014-8-26 · sbm lead the to new areas of sand making machine. The quickly crushing, coarse grinding function. The crusher machine Structure is simple to install, easy maintenance, low running costs the moisture content of materials by non-broken material capacity, impact, moisture content of up to 8%.

Proppants for shale gas and oil recovery

2019-9-13 · glass, sintered bauxite and kaolin, and fused zircon. Current state-of-the-art proppants are manufactured from sintered high-grade bauxite and kaolin. High-grade bauxites are preferred for achieving the high strength required for proppants in deep wells, where closure stresses in the gas-bearing strata can exceed 8,000 to 10,000 psi.

Thermal Energy Storage Technologies

2021-3-31 · Sintered bauxite particles 1.1 2000 400 1000 385 770 NaCI 0.9 2160 200 500 315 680 Cast iron 0.6 7200 200 400 210 1512 Cast steel 0.6 7800 200 700 210 1638 Silica fire bricks 1 1820 200 700 350 637 Magnesia fire bricks 1.2 3000 200 1200 420 1260 Graphite 1.9 1700 500 850 665 1131

(PDF) Microstructure and properties of sintered mullite ...

Abstract and Figures. Dense mullite aggregates with 72% Al2O3 have been synthesized by reaction sintering of two varieties of Indian bauxite and silica sol. The bauxites used …

Experimental Study of Fracture Conductivity for Water ...

2001-9-1 · A series of laboratory conductivity experiments was performed with fractured cores from the east Texas Cotton Valley sandstone formation. Jordan sand and sintered bauxite proppants were used at concentrations of 0, 0.1, and 1.0 lbm/ft 2, and the conductivity was measured at effective closure stresses ranging from 1,000 to 7,000 psi. The work ...

Proppant particles formed from slurry droplets and …

Process for the production of sintered bauxite spheres: 1984-04-03: Lunghofer et al. 4427068: Sintered spherical pellets containing clay as a major component useful for gas and oil well proppants: 1984-01-24: Fitzgibbon: 2596844: Treatment of wells: 1952-05-13: Clark: 2596843: Fracturing formations in wells: 1952-05-13: Farris

Proposal for management and alkalinity transformation of ...

2016-3-29 · Bauxite residue is a hazardous solid waste produced during the production of alumina. Its high alkalinity is a potential threat to the environment which may disrupt the surrounding ecological balance of its disposal areas. China is one of the major global producers of alumina and bauxite residue, but differences in alkalinity and associated chemistry exist between residues from China and those ...

Proppant Crushing Mechanisms Under Reservoir …

2018-12-15 · Proppant crushing, a major proppant failure mechanism, occurs in geothermal energy and oil/gas stimulation production stages when the level of net stress exerted on the proppant exceeds the actual crush resistance of the material. Loss of effective reservoir conductivity due to proppant crushing can result in significant loss in productivity, and so it is crucial to understand the realistic ...

Study and application of intensified sintering process for ...

The results show that 3CaO·2SiO2, and 2CaO·SiO2, are primarily formed in the sintering process when diasporic bauxite is sintered at soda ratio Na2O/ (Al2O3 +Fe2O3) of 1 and lime ratio CaO/SiO2 ...

Influence Factors on the Properties of Ultrahigh ...

2018-4-24 · Sintered bauxite is the most important aluminum-bearing mineral, the main components are Al(OH) 3, γ-AlO(OH) and α-AlO(OH), goethite, hematite, kaolinite, and a small amount of anatase TiO 2. The density of natural sintered bauxite is 3.9-4 g/cm 3, and the hardness is among 1∼3. Because it is opaque and brittle, it will not be suitable as ...

PREMIUM ALUMINA FOR REFRACTORY APPLICATIONS

2018-2-19 · • Brown sintered alumina, BSA 96 • Alumina and magnesia-rich spinels Calcium hexa-aluminates, Bonite and SLA 92 Across our core markets—refractories, ceramics and polishing—we deliver one-stop shop-ping, always expanding our portfolio to meet customer and market requirements. 2 Almatis, Inc., Bauxite, Arkansas, USA Almatis Alumina

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2021-9-9 · 1981.9-1986.7,1986.10-1991.2,(Ph.D.)1991.2-1993.4,1993.4-1993.11 ...

Effect of self-glazing on reducing the radioactivity ...

2011-12-30 · 1. Introduction "Bauxite residue", also known as "red mud", is the by-product of the digestion of bauxite ores with caustic soda in high pressure autoclaves according to the Bayer process, in order to produce alumina is a complex material whose mineralogical and chemical composition vary widely depending upon the source of bauxite ores and the technological process parameters .

Recycling of solid wastes ferrochromium slag for ...

2020-1-1 · The mechanism of solidification of chromium ions in sintered ceramics was further studied. Finally, ceramic proppants were successfully prepared with high-strength spinel-corundum ceramics. At the best sintering temperature of 1320 °C, the performances were 5.08% of breakage ratio under 52 MPa and 3.03 g/cm 3 of apparent density.

Development of Solar-powered Thermochemical …

2020-11-21 · • Solid particle receiver uses sintered bauxite proppants for heat collection and storage – Directly illuminated curtain of falling particles – Low cost thermal storage – Non-corrosive – High heat flux capability • Extensive development by Sandia Livermore in mid 1980s – Sintered bauxite suitable to 1000oC – Zircon suitable to ...

Properties and application of sintered corundum ...

2021-1-28 · Properties and application of sintered corundum. Jan 28, 2021. Sintered corundum is a refractory clinker that uses Al2O3 (γ-Al2O3) as a raw material, with a content of α-Al2O3 greater than 90wt%, and is shaped and calcined at a high temperature of 1900℃. Sintered alumina is mainly prepared by direct combination of fine corundum grains.

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2021-5-31 · Mechanism analysis and process optimization of sand and plug removal with rotating jet in horizontal well Journal of Central South University 0.464 88 Research into sulfide resistant polymer latex cement for sour well applications Anti-Corrosion Methods and 89