refractory materials for slagging gasifiers
Improved refractory materials for slagging coal gasifiers
Current generation refractory materials used to line the gasifier vessel and contain the gasification reaction typically last no longer than six to 18 months in commercial applications contributing to gasifier online availabilities that fall far short of targeted goals.
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Exposure of refractory materials during high-temperature
Feb 01 2018 · In this study different refractory materials were evaluated under slagging gasification conditions. Refractory probes were continuously exposed for up to 27 h in an atmospheric oxygen blown entrained flow gasifier fired with a mixture of bark and peat powder. Slag infiltration depth and microstructure were studied using SEM EDS.
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Gasification Gasifier Refractory Services
These are high quality special shaped brick which typically have long delivery times. Our familiarity with the wear areas of gasifiers allows us to recommend to our customers the appropriate materials to inventory for emergency purposes. Advantages of relying upon Thorpe for gasifier refractory
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LOW CHROME/CHROME FREE REFRACTORIES FOR SLAGGING
The refractory liner materials used in today s slagging gasifiers are typically fused or dense firebrick containing Cr 2 O 3 (60 to 90 wt pct) with a second refractory oxide (typically Al 2 O 3 ZrO 2 or MgO).
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Gasifier Refractories Coal Slags and Their Interaction
Slagging gasifiers are typically operated between 1300 and 1600°C at pressures of 2.75 MPa (400 psi) or more with best refractory material for use in slagging conditions. In general acidic refractory should be selected for acidic slags and
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Investigation of shaped alumina based refractories used in
Jul 01 2011 · Mixing pressing and sintering the raw materials with the corrodent brown coal ash simulate the impingement of slag into the refractory material which is the worst corrosion effect during gasification. The solid alkaline particles of the ash enclose the solid raw materials and lead to alkali reactions on the complete aggregate surface area.
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Modelling of high-chromia refractory spalling in slagging
Dec 01 2008 · Abstract. The economic viability of converting coal into clean burning liquid fuels in slagging coal gasifiers is compromised by the limited service lifetime of hot-face refractories. One of the most severe refractory degradation mechanisms is spalling which can occur by either volume-expansion phenomena (compressive stresses) or by volume
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(PDF) Corrosion Resistant Refractory Ceramics for Slagging
The majority of the refractory materials tested for gasifier lining applications cannot resist the action of slagging corrosive environment combined with high operation temperatures as high as
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Improved Refractories for Slagging Gasifiers in
Current generation refractory liners in slagging gasifiers are typically replaced every four to 18 months at costs ranging up to 2 000 000 depending upon the size of the gasification vessel. Compounding materials and installation costs are the lost-opportunity costs for the time that the gasifier is off-line for the refractory exchange.
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Refractory Lining Material Improves Gasifier Performance
Refractory materials are used to line the interior of slagging gasifiers where a carbon-based feedstock such as coal petcoke and/or biomass is converted at high temperatures in an oxygen-deficient environment to produce synthesis gas which can be used in power generation.
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(PDF) Corrosion Resistant Refractory Ceramics for Slagging
The majority of the refractory materials tested for gasifier lining applications cannot resist the action of slagging corrosive environment combined with high operation temperatures as high as
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IMPROVED REFRACTORY MATERIALS FOR SLAGGING
materials removed from slagging gasifiers and determined that the primary cause of material failure is caused by two factors 1) dissolution of the refractory into the molten slag and 2)
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AN UPDATE ON FIELD TEST RESULTS FOR AN ENGINEERED
improved materials the National Energy Technology Laboratory has developed and patented a phosphate-modified chromium oxide refractory designed specifically for longer service life in air-cooled slagging coal gasifiers 8 and adapted the material for commercial production in collaboration with Harbison-Walker Refractories Company. In
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Dec 24 2009 · Refractory materials are used to line the interior of slagging gasifiers where a carbon-based feedstock (such as coal petroleum coke and/or biomass) is converted at high temperatures in an oxygen short atmosphere into hydrogen and carbon monoxide called synthesis gas.
Chat OnlineGasifier Refractories Coal Slags and Their Interaction
Slagging gasifiers are typically operated between 1300 and 1600°C at pressures of 2.75 MPa (400 psi) or more with best refractory material for use in slagging conditions. In general acidic refractory should be selected for acidic slags and
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MOLTEN SLAGS FORMED DURING GASIFICATION OF
Air cooled slagging gasifiers are lined with high chrome oxide refractory material of the two types listed in Table 1 (chromia/alumina and chromia/alumina/zirconia) which contains
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Gasifier Refractories Coal Slags and Their Interaction
Slagging gasifiers are typically operated between 1300 and 1600°C at pressures of 2.75 MPa (400 psi) or more with best refractory material for use in slagging conditions. In general acidic refractory should be selected for acidic slags and
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Gasifier Refractories Coal Slags and Their Interaction
Slagging gasifiers are typically operated between 1300 and 1600°C at pressures of 2.75 MPa (400 psi) or more with best refractory material for use in slagging conditions. In general acidic refractory should be selected for acidic slags and
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MOLTEN SLAGS FORMED DURING GASIFICATION OF
Air cooled slagging gasifiers are lined with high chrome oxide refractory material of the two types listed in Table 1 (chromia/alumina and chromia/alumina/zirconia) which contains
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LOW CHROME/CHROME FREE REFRACTORIES FOR
The refractory liner materials used in today s slagging gasifiers are typically fused or dense firebrick containing Cr 2 O 3 (60 to 90 wt pct) with a second refractory oxide (typically Al 2 O 3 ZrO 2 or MgO).
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Refractory liner materials used in slagging gasifiers
Abstract Refractory liners are used on the working face of entrained flow slagging gasifiers that react coal petroleum coke or other carbon feedstock with oxygen and water. The refractory liners
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Development of Slag Management System SpringerLink
Degradation of refractory liners is one of the key factors limiting the service life of entrained flow slagging gasifiers which is caused primarily by refractory/slag interactions. Slag originates from impurities in the carbon feedstock typically coal and/or petcoke which melt and coalesce during gasification flowing over the refractory
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Refractory loss in slagging gasifiers. January 2001 Project In order to improve the economic feasibility of gasifiers new refractory lining materials with a long service life have to be
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Refractories Research for Slagging Gasifiers • W. Bakker EPRI BACS 62 (12) 1983 Slagging gasifiers operate at high temp. and the coal ash is removed as liquid slag. The viscosity of the liquid slag must be sufficiently low to permit slag tapping. • W. Bakker EPRI BACS 63 (7) 1984 Major factors affecting refractory performance are temp.
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Jan 01 2005 · Refractory liners for slagging gasifiers used in power generation chemical production or as a possible future source of hydrogen for a hydrogen based economy suffer from a short service life. These liner materials are made of high Cr2O3 and lower levels of Al2O3 and/or ZrO2. As a working face lining in the gasifier refractories are exposed to molten slags at elevated temperature that
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Improved Lining Material for Gasifiers Could Lead to Wider
Nov 16 2009 · Refractory materials are used to line the interior of slagging gasifiers where a carbon-based feedstock (such as coal petroleum coke and/or biomass) is converted at high temperatures in an oxygen short atmosphere into hydrogen and carbon monoxide called synthesis gas.
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Cost Effective Improved Refractory Materials for
72067S03-I High temperature slagging gasifiers have refractory liners that deteriorate rapidly and have a relatively short life requiring considerable costly maintenance. Depending on operating temperature unit size and feedstock refractory liners typically last 6-18 months and replacement costs exceed 1 million including materials
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Refractory liner materials used in slagging gasifiers
Abstract Refractory liners are used on the working face of entrained flow slagging gasifiers that react coal petroleum coke or other carbon feedstock with oxygen and water. The refractory liners
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Jun 01 2013 · Furthermore according to outstanding HMOR as well as good thermal shock performance the alumina-spinel castable with 6 wt. MA-cement is suitable to be applied as a refractory lining for slagging gasifiers. After sintering the samples consist of spinel alumina and CA phases which were formed by the reaction of alumina with CaO from the cement.
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Dec 24 2009 · Refractory materials are used to line the interior of slagging gasifiers where a carbon-based feedstock (such as coal petroleum coke and/or biomass) is converted at high temperatures in an oxygen short atmosphere into hydrogen and carbon monoxide called synthesis gas.
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