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Low-temperature roasting furnace for producing amorphous aluminum oxide from crystalline aluminum chloride

A technology of amorphous alumina and crystalline aluminum chloride, which is applied in the field of low-temperature roasting furnaces to achieve the effects of fast heat and mass transfer, uniform temperature distribution, and adjustable residence time

Pending Publication Date: 2022-02-15
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no mature industrialized device for extracting alumina from fly ash in the world.

Method used

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  • Low-temperature roasting furnace for producing amorphous aluminum oxide from crystalline aluminum chloride
  • Low-temperature roasting furnace for producing amorphous aluminum oxide from crystalline aluminum chloride

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Embodiment Construction

[0021] A low-temperature roasting furnace for producing amorphous alumina by crystalline aluminum chloride of the present invention comprises: a hot blast furnace 1, an air chamber 2, an air distribution plate 3, a furnace reaction zone 4, a furnace flare section 5, a cyclone separator 6, a cooling Tuyere 7, feed inlet 8, furnace discharge outlet 9 and cyclone separator feeding leg 10.

[0022] The high-temperature flue gas generated by the hot blast stove 1 is mixed with the multi-stage and evenly distributed cooling air from the cooling tuyere 7 and then enters the air chamber 2, and the flue gas in the air chamber 2 enters the furnace reaction zone 4 through the air distribution plate 3, so that the furnace reaction zone The crystalline aluminum chloride and alumina materials in 4 reach a fluidized state;

[0023] The flue gas heat in the furnace reaction zone 4 is transferred to the crystalline aluminum chloride material, and the crystalline aluminum chloride undergoes a l...

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Abstract

The utility model relates to a low-temperature roasting furnace for producing amorphous aluminum oxide from crystalline aluminum chloride. The low-temperature roasting furnace comprises a hot-blast stove (1), an air chamber (2), an air distribution plate (3), a hearth reaction area (4), a hearth flaring section (5), a cyclone separator (6), a cooling air port (7), a feed port (8), a hearth discharge port (9) and a cyclone separator blanking leg (10). According to the invention, the temperature of the hearth reaction area is controlled at the low-temperature decomposition temperature point of the crystalline aluminum chloride, and the crystalline aluminum chloride can have enough residence time in the hearth reaction area, so that the crystalline aluminum chloride can be converted into amorphous aluminum oxide to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of crystalline aluminum chloride roasting, in particular to a low-temperature roasting furnace for producing amorphous alumina from crystalline aluminum chloride. Background technique [0002] my country is a country that is very short of bauxite resources, and the problems of domestic resource depletion and foreign import dependence are becoming increasingly severe. The Jungar mining area is rich in coal resources. After the coal is burned in the boiler of a power plant, the fly ash obtained is enriched with a large amount of alumina, usually with a content of more than 50%, which is a potential resource for extracting alumina. The extraction of alumina from fly ash realizes the recycling of resources and has great application prospects. Shenhua Zhuneng Resources Comprehensive Development Co., Ltd. has independently developed the "one-step acid solution" process technology and built a 4,000-ton / year alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D9/00F27D17/00F27D19/00C01F7/30
CPCF27D9/00F27D19/00F27D17/004F27D17/008C01F7/30
Inventor 孙燕锋李万山韩学斌侯云辉陈文竹皇甫文英左建云索明琛
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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