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Equipment and method for calcining alpha aluminum oxide by using aluminum oxide gaseous suspension calciner

A gaseous suspension, ɑ-alumina technology, applied in the preparation of alumina/hydroxide, etc., can solve problems such as single product, achieve the effect of improving utilization rate, improving market competitiveness and reducing production cost

Inactive Publication Date: 2014-09-24
鞠复勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the existing alumina gaseous suspension roasting furnaces only produce a single product, generally firing metallurgical grade alumina, and only 10% of the product contains α-alumina.

Method used

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  • Equipment and method for calcining alpha aluminum oxide by using aluminum oxide gaseous suspension calciner
  • Equipment and method for calcining alpha aluminum oxide by using aluminum oxide gaseous suspension calciner

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specific Embodiment approach

[0040] like figure 1 , 2 As shown, an alumina gaseous suspension roasting furnace is used for firing ɑ alumina, including: feeding system, alumina drying system, dust-containing waste gas filtration system, combined combustion station, roasting furnace P04, cyclone dust collector P03, Insulation retention tank L03, step-by-step cooler, the input end of the dust-containing exhaust gas filtration system is connected to the feeding system through the alumina drying system, and the output end of the dust-containing exhaust gas filtration system is connected to the end of the valve K04 and valve K05. The other end of the valve K04 is communicated with the roasting furnace P04; the other end of the valve K05 is communicated with the roasting furnace P04 through the combined combustion station; the roasting furnace P04 is communicated with the insulation retention tank L03 through the cyclone dust collector P03; The stage cooler and fluidized bed B01 are connected to the high tempe...

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Abstract

The invention relates to the technical field of high-temperature aluminum oxide production and discloses equipment and method for calcining alpha aluminum oxide by using an aluminum oxide gaseous suspension calciner. The equipment adopted in the method is characterized in that the input end of a dust-contained waste gas filtering system is communicated with a feeding system through an aluminum oxide drying system, and the output end of the dust-contained waste gas filtering system is connected with the end for communicating a valve K04 and a valve K05; the other end of the valve K04 is communicated with a calciner P04; the other end of the valve K05 is communicated with the calciner P04 through a combined combustion station; the calciner P04 is communicated with a heat insulation retention tank L03 through a cyclone dust collector P03; the heat insulation retention tank L03 is connected with a high-temperature aluminum oxide storage tank D12 through a step-by-step cooler and a fluidized bed B01. The equipment and method can be used for meeting the requirement for alternate production of high-temperature aluminum oxide and aluminum oxide, and are very suitable for building or modifying the traditional calciner, capable of increasing the utilization ratio of the equipment as well as more advantageous and environment-friendly on the aspects of saving energy and reducing emission as comparison with the traditional rotary kiln when used for calcining high-temperature aluminum oxide.

Description

technical field [0001] The invention relates to the technical field of high-temperature alumina production, in particular to equipment and a method for firing α-alumina in an alumina gaseous suspension roasting furnace. It is suitable for technical transformation or new construction of alumina gas suspension roasting furnace, making it an equipment that can burn both metallurgical grade alumina and α-alumina. Background technique [0002] At present, the existing alumina gaseous suspension roasting furnaces only produce a single product, generally firing metallurgical grade alumina, with only 10% α-alumina in the product. Since the source of α-alumina is mainly the separation efficiency of the primary cyclone cooler of the roaster is only about 90%, 10% of the alumina is converted into α-alumina through the high-temperature zone of the roaster combustion station with the separated hot air. It is necessary to renovate or build the existing roaster to make it an equipment cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/30
Inventor 鞠复勇孙光佳
Owner 鞠复勇
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