Method for preparing hydrogen gas by hot aluminum slag/vapor combined reaction

A technology of water vapor and aluminum slag, applied in the field of hot aluminum slag combined with water vapor reaction to prepare hydrogen, can solve problems such as difficulties, achieve low cost, improve system energy utilization efficiency, and promote high-temperature reactions

Active Publication Date: 2016-08-10
SUZHOU UNIV
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  • Claims
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Problems solved by technology

However, the above methods require pretreatment, grinding, or compounding or alloying of aluminum with other materials, which poses certain difficulties to the direct use of aluminum slag to produce hydrogen.

Method used

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  • Method for preparing hydrogen gas by hot aluminum slag/vapor combined reaction
  • Method for preparing hydrogen gas by hot aluminum slag/vapor combined reaction
  • Method for preparing hydrogen gas by hot aluminum slag/vapor combined reaction

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention.

[0028] Such as figure 1 As shown, the present invention uses the solid waste thermal aluminum slag produced in the recycling and smelting process of metal aluminum as raw material, fully utilizes the metal aluminum and waste heat resources rich in aluminum slag, and reacts with water vapor to prepare hydrogen, and the thermal aluminum The salt flux in the slag acts as an auxiliary agent, which can greatly accelerate the reaction between metal aluminum and water vapor, and at the same time, use the huge amount of heat generated during the reaction to generate high-temperature water vapor.

[0029] The hydrogen production system of the present invention is composed of solid raw material and gaseous raw material. The solid raw material is scum just picked up from aluminum regeneration smelting, a...

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Abstract

The invention discloses a method for preparing hydrogen gas by hot aluminum slag/vapor combined reaction. The method comprises the following steps: in the metal aluminum regeneration smelting process, quickly putting removed aluminum slag into a reaction furnace, continuously introducing vapor to react with metal aluminum, recovering the aluminum-oxide-rich aluminum slag obtained after high-temperature reaction, and passing the generated high-temperature gas through a heat exchanger to obtain liquid water and pure hydrogen gas. The hot aluminum slag is used as an aluminum regeneration resource instead of the primary aluminum to prepare the hydrogen gas, thereby effectively lowering the energy consumption and environment load. The hydrogen production technique is lower in cost, does not need any additional activation technique link, and can further recover the aluminum oxide in the reaction solid product. The hydrogen production technique can obtain the hydrogen fuel, and can effectively utilize the reaction heat to obtain the high-temperature vapor, so that the energy utilization efficiency of the system is further enhanced.

Description

technical field [0001] The invention relates to a method for recycling aluminum slag, in particular to a method for preparing hydrogen by combining hot aluminum slag with steam reaction. Background technique [0002] Aluminum recycling and smelting aims to recycle aluminum-rich waste such as aluminum waste generated during production and processing, aluminum products beyond the service life, and white slag generated in the electrolytic aluminum process. During the smelting process, a large amount of aluminum slag will be produced regularly, generally containing 20-60wt% aluminum metal, 30-50wt% salt flux, oxides of some metal elements (Al, Si, Cu, Fe, Zn, etc.). As a renewable resource with extremely high economic value, aluminum slag has not attracted enough attention for a long time, and in actual treatment, it is still dominated by simple landfill and random stacking. Because aluminum slag contains a large amount of soluble chloride salts, it is easy to pollute water sou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/10
CPCC01B3/10Y02E60/36Y02P20/10
Inventor 李鹏国宏伟侯新梅张梅
Owner SUZHOU UNIV
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