System and method for cooperatively processing secondary aluminum ash by virtue of cement kiln

A co-processing, cement kiln technology, applied in cement production, alumina/aluminum hydroxide, alkali metal hydroxides, etc., can solve the problems of improper gas disposal, large investment, danger of explosion and combustion, and achieve the effect of eliminating toxicity

CN108773849APending Publication Date: 2018-11-09长沙中硅环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-11-09

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Abstract

The invention provides a system and a method for cooperatively processing secondary aluminum ash by virtue of a cement kiln. The system comprises a waste residue preprocessing system, an anaerobic wet-grinding conversion system, an alkali metal salt leaching system and a cement kiln resourceful treatment system which are sequentially connected, wherein all equipment and connecting pipelines in thesystem are sealed, and a suction machine is arranged so as to generate a micro-negative pressure. The method comprises the following steps: (S1) secondary aluminum ash preprocessing, (S2) anaerobic wet-grinding conversion, (S3) alkali metal salt leaching, and (S4) cement kiln resourceful treatment. According to the system and the method, the harmless and resourceful final treatment of the secondary aluminum ash can be realized, 0.1t-0.3t of alkali metal salt, 0.02t-0.1t of caustic soda and 0.5t-0.8t of aluminum oxide byproducts can be extracted during the treatment of 1t of secondary aluminumash, and 0.2t-0.3t of cement raw materials and 0.05t-0.2t of a denitration agent can be provided for a cement plant. By utilizing an anaerobic wet-grinding conversion machine, H2 and CH4 generated inthe conversion process do not burn and explode, the disinfection and conversion of solid waste residue materials can be realized, and converted gas can be extracted.
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Description

technical field

[0001] The invention relates to a system and method for disposing of aluminum smelting industrial waste residue, in particular to a system and method for utilizing cement kiln to collaboratively resource-dispose secondary aluminum ash, and belongs to the technical field of aluminum smelting industrial waste residue recycling and reuse. Background technique

[0002] Aluminum ash is insoluble matter and other impurities floating on the surface of aluminum melt during the production of electrolytic aluminum, cast aluminum and recycled aluminum. The aluminum ash released from the electrolytic aluminum factory is also called white aluminum ash. According to statistics, 1 ton of electrolytic aluminum produces about 30kg of white aluminum ash, which contains 20-70% of metallic aluminum. Generally, the aluminum ash is removed from the smelting furnace with an iron rake. After the molten aluminum is cooled, most of the metal aluminum can be recovered by grinding and g...

Examples

Embodiment Construction

[0120] The invention will be further described below in conjunction with the embodiments and accompanying drawings, but they are not used to limit the scope of the invention.

[0121] like Figure 1-6 As shown, this embodiment provides a cement kiln co-processing system for secondary aluminum ash, which specifically includes: sequentially connected waste residue pretreatment system, anaerobic wet grinding converter system, alkali metal salt leaching system and cement kiln resource treatment The system, all equipment and connecting pipelines in the system are sealed, and a suction machine is set to form a micro-negative pressure;

[0122] The waste slag pretreatment system includes: secondary aluminum ash pretreatment device, the secondary aluminum ash pretreatment device includes the original ash bin 101, metering feeder 102, grinding equipment 103, powder selection equipment, powder Stock bin 105; Grinding equipment 103 comprises air-swept ball mill system, and powder select...