refractory aggregate comprising

refractory aggregate comprising

Calcium aluminate clinker as a refractory aggregate with ...

2012-1-25  The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12, wherein x is an integer from about 1 to about 24, and wherein said clinker has from zero to less than about fifty weight percent C12A7, and

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Calcium aluminate clinker as a refractory aggregate with ...

The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12, wherein x is an integer from about 1 to about 24, and wherein said clinker has from zero to less than about fifty weight percent C12A7.

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Monolithic refractories - Taikorozai Co., Ltd.

1993-7-9  Monolithic refractories comprising 100% by weight of refractory aggregate powders, and in addition thereto, based on the weight of said powders, 0.05 to 5% by weight of a binder selected from the group consisting of phosphate glass mainly composed of P 2 O 5-Al 2 O 3-Na 2 O-K 2 O, and hydroxycarboxylates and combinations of the phosphate glass ...

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WO2005021434A2 - Calcium aluminate clinker as a refractory ...

The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12, wherein x is an integer from about 1 to about 24, and wherein said clinker has less less than about fifty weight percent C12A7.

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Mixtures of phenolic novolaks for use with refractory ...

A composition comprising: a binder comprising: (i) a solvent (ii) a phenolic novolak resin dissolved in the solvent; and (iii) a chemical agent for improving green strength of a refractory aggregate-containing green body bound by the binder; wherein the binder contains about 0.2 to about 1.5 weight percent water.

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Patents Assigned to Westmoreland Advanced Materials, Inc ...

2013-9-20  Abstract: The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula CnAx wherein C is calcium oxide and A is aluminum oxide, wherein n is an integer from about 1 to about 12, wherein x is an integer from about 1 to about 24, and wherein said clinker has from zero to less than about fifty weight percent C12A7, and ...

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US Patent for Non-slumping sprayable refractory castables ...

2001-8-29  An essentially non-slumping sprayable refractory castable composition that is applied without forms is disclosed comprising (a) a tempered, pumpable first component comprising (i) one hundred weight percent of a refractory composition comprising from about 60 to 90 weight percent of a refractory aggregate, from about 2 to 25 weight percent of an ultrafine refractory material having an average ...

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CA1249608A - Abrasion resistant refractory composition ...

Abstract of the Disclosure A refractory composition characterized by abrasion resistance and low thermal conductivity comprising about 40 to about 96 weight percent amorphous silica, about 2 to about 50 weight percent -65 mesh calcined refractory aggre-gate having a density of at least about 140 lb/ft3 and about 2 to about 40 weight percent calcium aluminate cement.

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Refractory Bricks Fire Bricks Types Of Refractory ...

2021-5-15  Mostly, normal refractory brick created of natural fire clay is as good as acid brick, but if additional acid resistance is required then an additional amount of silica is added to on fire clay which may range up to 97% of its composition.. For binding bases, 1 to 2% lime may be added on.Acid bricks are burnt at large temperatures for lengthy periods.. 2. Ordinary Refractory Brick

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Chrome Compounds: Refractory Cements, Refractory

2021-8-12  One major class of refractory cement additives is that of chrome compounds; chrome flour, chrome sand (chromite) and directly chromium (iii) oxide (chromia, Cr 2 O 3 ). It is stated that 18% of all chromite is used for refractory purposes (9). Chrome-based refractory

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US5252526A - Insulating refractory - Google Patents

A refractory mix for forming high strength, low thermal conductivity refractory shapes comprising from about 40 to 75% by weight of at least one dense refractory aggregate, about 10 to 30% by weight of a bonding agent, and about 5 to 25% by weight of hollow ceramic microspheres having a diameter of about 1 to 350 microns.

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US Patent for Two-part gunning refractory composition ...

The present invention relates to a two-part gunning refractory composition wherein fine powders of a refractory aggregate and superfine refractory powders are previously made into the form of a slurry containing therein a deflocculant, thereby reducing the amount of aluminous cement and also reducing the amount of water to achieve a deposit applied by gunning having a quality comparable to one ...

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US3432312A - Refractory mold composition and method ...

refractory composition mold weight aggregate Prior art date 1965-09-08 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Roy C Feagin Edward L Dahowski Peter ...

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Lightweight Refractory Aggregates Mantec Refractories

Ultralite Graded Aggregate (UGA) Ultralite Graded Aggregate (UGA) is supplied to customers who prefer to utilise Ultralite as a lightweight refractory aggregate to manufacture their own refractory shapes. Ultralite Graded Aggregate (UGA) is the graded version of Mantec’s Ultralite Loose Fill (ULF) insulation material and is available in two main grades with maximum service temperatures ...

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Optimizing compressive behavior of concrete containing ...

Optimizing compressive behavior of concrete containing fine recycled refractory brick aggregate together with calcium aluminate cement and polyvinyl alcohol fibers exposed to acidic environment. Author links open overlay panel Mahdi Nematzadeh Javad Dashti Behnoud Ganjavi. Show more.

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Methods of Use of Calcium Hexa Aluminate Refractory ...

2013-9-20  A method for improving the insulating character/and or penetration resistance of a surface comprising lining a surface of a lime kiln, a cement kiln, a roasting kiln, a thermal oxidizer, or a fluidized bed reactor that is subject to wear by an alkali environment and/or an alkaline environment with a refractory composition comprising a refractory aggregate consisting essentially of a calcium ...

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as a refractory aggregate Prominer (Shanghai) Mining ...

The present invention provides for a refractory aggregate composition comprising an improved calcium aluminate clinker having the formula C n A x wherein C is calcium oxide and A is aluminum oxide wherein n is an integer from about 1 to about 12 wherein x is an integer from about 1 to about 24 and wherein said clinker has less less than about ...

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High tech industrial Ceramics.: Cast-able refractory ...

2015-4-16  Cast-able refractory composition pre-mixed materials. Material is obtained by tempering a castable refractory powder composition comprising refractory aggregate, fine refractory powder, alumina cement, a dispersing agent and an alumina cement hydration stopper with water. The hydration stopper is acidic in a state of an aqueous solution.

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(PDF) Recycled Refractory Brick as Aggregate for Eco ...

The replacement level by volume of the refractory brick aggregate were taken as 0%, 10%, 20%, 30%, 40%, 50%, 70%, 100%. In this paper, two types of RBA were used. For each RBA type, two concretes ...

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Optimizing compressive behavior of concrete containing ...

2018-3-10  To face this challenge, this research set out to investigate the compressive behavior of concrete containing fine recycled refractory brick aggregate together with calcium aluminate cement (CAC) and polyvinyl alcohol (PVA) fibers under an acidic environment.

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Insulating Castable Refractories – Specification Best ...

On the face of it all insulating castable refractories look the same, comprising a mixture of aggregates, cement and additives, such as clay and fillers. When mixed with water, they will form a slurry suitable for application via casting, gunning, ramming, pouring or plastering,

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(PDF) Corrosion mechanism of Cr2O3-Al2O3-ZrO2 refractories ...

Corroded microstructure of a Cr2O3-Al2O3-ZrO2 refractory brick after 4200 h service in a gasifier was investigated. An isolation layer comprising mainly (Mg, Fe2+)(Cr, Fe)2O4 complex spinel was ...

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艾瑞:2019年中国IaaS公有云市场排名及份额出炉_互联网 ...

2020-8-12  艾瑞:2019年中国IaaS公有云市场排名及份额出炉聚焦云服务的市场表现,政策与产业环境变化加速释放需求,云厂商的持续加码进一步推动了市场繁荣;而核心赛道——IaaS公有云市场中竞争依旧激烈,且出现诸多变数,市场集中度进一步上升,不断挤压踝部、尾部厂商的生存空间。

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(PDF) The effect of aggregate aspect ratio and temperature ...

Prata et al. (2003) investigated the influence of the aggregate's aspect ratio on fracture behavior of a low cement aluminum silicate refractory at two different temperatures (110 o C and 1000 o C ...

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The Effect of Aggregate Aspect Ratio and Temperature on ...

Vol. 6, No. 4, 2003 The Effect of Aggregate Aspect Ratio and Temperature on the Fracture Toughness of a Low Cement Refractory CoMaterials Research, Vol. 6, No. 4, 545-550, 2003. ncrete 545© 2003

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EPO - T 0781/97 (Repair agent/MINTEQ) of 30.5.2000

2000-5-30  "A dry refractory composition for the coating and repair of an interior refractory lining of a furnace and the like, comprising a MgO or MgO equivalent containing refractory aggregate and 15-50 wt% of the total composition of a hydrated material containing chemically bound water in crystalline form, said hydrated material being present in a ...

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Lightweight alumina refractory aggregate. Phase 2, Pilot ...

1994-11-1  Kilogram quantities of refractory aggregate were prepared from both a paste and a pelletized form of extruder feed material in both bench and pilot-scale equipment. The 99{sup +} % alumina aggregate exhibited a bulk density approaching 2.5 g/cm{sup 3} and a

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Creep of refractory concretes - Iowa State University

2018-8-14  The aggregate is the major portion of a refractory concrete, usually comprising approximately 75% of the mixture. The high temperature aggregates are held together by a bond capable of giving a solid mass which has adequate properties both before and after firing to a high temperature. Aggregate purity is an important parameter of

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Chromous calcium hexaaluminate-based refractory aggregate ...

This technical result is also achieved by the fact that in a method of producing refractory filler based on chromium exhalent calcium by processing high-alumina slag aluminothermic production of chromium metal by grinding according to the invention, the slag is subjected to an additional annealing at a temperature 1500-1750°C, then ground to obtain aggregate of predetermined composition

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PREMIUM ALUMINA FOR REFRACTORY APPLICATIONS

2020-5-29  REFRACTORY AGGREGATES REFRACTORY AGGREGATES Tabular Alumina T60/T64 High-purity aggregate Almatis Tabular Alumina T60/T64 is widely used Tabular alumina exhibits excellent chemical for various high temperature applications. The purity and unique microstructure of tabular alumina offer considerable advantages over

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Refractory concrete based on barium aluminate–barium ...

2005-1-1  Refractory concretes prepared from 20 wt.% of this cement and 80 wt.% of either bauxite or fused spinel aggregate are composed mainly of mullite, barium aluminate, barium zirconate and α-corundum in case of bauxite aggregate or magnesium aluminate spinel in addition to barium aluminate and barium zirconate in case of fused spinel aggregate ...

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Effect of aggregate on aggregate/spinel matrix bonding ...

2020-8-1  In this study, lightweight refractory was fabricated via carbothermal reduction of MgO. The process proceeded by oxygen diffusion rate controlled oxidation of Mg vapor and subsequent reaction between deposited MgO and Al 2 O 3.The aggregate had an obvious effect on the characteristics of the aggregate/spinel matrix bonding interface and mechanical performance of lightweight spinel-bonded ...

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Properties of alumina based low-cement self flowing ...

2007-1-1  All aggregate system components were mixed dry for 1 min in Hobart mixer. After water addition wet mixing was continued until getting flowing refractory about 4 min. A part of this flowing refractory was taken for the flow test and the other part was poured into the moulds of 50 mm × 50 mm × 50 mm without vibration.

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Corrosion mechanism of Cr2O3-Al2O3-ZrO2 refractories in a ...

2020-2-1  Corroded microstructure of a Cr 2 O 3-Al 2 O 3-ZrO 2 refractory brick after 4200 h service in a gasifier was investigated. An isolation layer comprising mainly (Mg, Fe 2+)(Cr, Fe) 2 O 4 complex spinel was formed on the refractory’s surface, which effectively suppressed the infiltration of main corrosive constituents in the slag (Fe X O, MgO). Furthermore, a quantitative analysis of main ...

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Corrosion of high-chrome refractory materials by high ...

2021-7-30  The high-chrome refractory for post-mortem analysis was acquired from the side wall under the burner plane of an entrained-flow gasifier in Xinjiang, China ().It had serviced over 6000 h at approximately 1350 °C, 6.5 MPa, and reducing atmosphere [].The refractory brick was sectioned into samples with approximate width of 10 mm and thickness of 5 mm along the direction of slag penetration.

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TFT屏幕-ILI9486数据手册带命令标签版.pdf_ili9486中文手册 ...

2019-10-30  Introduction ILI9486 is a 262, 144-color single-chip Soc driver for a-Si TFT liquid crystal display with resolution of 320RGBX480 dots, comprising a 960-channel source driver, a 480-channel gate driver, 345, 600bytes GRAM for graphic data of 320RGBX480 dots, and power supply circuit The ILi9486 supports parallel CPU 8-9-/16-118-bit data bus ...

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Appeal Decision - jpo.go.jp

2019-9-17  (A) "A method for producing a refractory material for the production of pig iron, comprising the steps of: adding a binder consisting of phenol-based resin and optionally a small amount of solvent to an inorganic refractory aggregate such as aluminum or magnesia; adding a graphite powder, and kneading in a highspeed mixer for a short -

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CASTABLE REFRACTORY COMPOSITIONS COMPRISING

The dry refractory particulate composition of numbered paragraph 43, wherein the zeolithic microstructure is mono-dimensional, bi-dimensional, or tri-dimensional. A dry refractory particulate composition comprising; 5% to 95% by weight of aggregate, 1 % to 8% by weight of silica fume, 0.1% to 1.5% by weight of hydratable alumina,

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The influence of microstructure on the maximum load and ...

2010-1-1  The coarse fractions (above 0.0108 mm) are composed of Al 2 O 3 aggregate in both concretes, comprising 64.36 and 67.8 wt% of aggregates in A and B castables, respectively. Table 1 . Chemical composition and apparent density of the castables used

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