Aluminum ash harmless recycling comprehensive treatment system and method

A comprehensive treatment and recycling technology, which is applied in the harmless and resourceful comprehensive treatment system of aluminum ash and its treatment field, can solve the problems of incomplete treatment, secondary pollution of the environment, unavailable aluminum ash components, etc., and achieve a simple system , avoid adding and using, which is beneficial to the long-term effect

Active Publication Date: 2019-04-19
郑州鸿跃环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem solved by the present invention is: in the prior art, when the aluminum ash is processed, it causes secondary pollution to the environment, bri

Method used

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  • Aluminum ash harmless recycling comprehensive treatment system and method

Examples

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Example Embodiment

[0041] Example 1

[0042] A comprehensive treatment system for the harmless recycling of aluminum ash, such as figure 1 As shown, the system includes a hot frying system 1, a cooling system 2, a ball mill system 3, a screening system 4, a ammonia removal and fluorine fixation system 200, a filter press system 300, a flotation system 400, a dehydration system 500 and a roasting system 600, each Transport between the systems through the material transport system or conveyor belt;

[0043] The system also includes a dust collection system 5, which is connected to the hot stir-frying system 1. The system also includes an ammonia absorption system 201, which is connected to the ammonia removal and fluorine fixation system 200 through a gas delivery pipeline. Connected.

[0044] Using this system: the collected aluminum ash is first hot-fried in the hot-frying system (the flue gas generated during the hot-frying process enters the dust collection system through the gas delivery pipe for ...

Example Embodiment

[0046] Example 2

[0047] One of the comprehensive treatment methods for the harmless recycling of aluminum ash, the method comprising the following steps:

[0048] (1) Metal extraction

[0049] Using a conventional frying ash separation system, the collected aluminum ash is heated, cooled, ball milled, and sieved to obtain bulk aluminum, aluminum particles and secondary aluminum ash (the recovery rate of metallic aluminum is ≥90%);

[0050] The average particle size of the secondary aluminum ash is 200-300 mesh; the main components of the secondary aluminum ash are 35% alumina, 17% chloride salt, 30% aluminum nitride, 3% electrolyte, 15% metallic aluminum, 0% of heavy metals and heavy metal oxides.

[0051] (2) Deamination

[0052] The secondary aluminum ash obtained in step (1) is leached in hot water at 50°C under stirring for 8 hours, after the reaction is completed, the generated ammonia gas is collected, and the remaining slurry after the ammonia gas is recovered;

[0053] The mass...

Example Embodiment

[0062] Example 3

[0063] A second comprehensive treatment method for the harmless recycling of aluminum ash, the method includes the following steps:

[0064] (1) Metal extraction

[0065] Using a conventional frying ash separation system, the collected aluminum ash is heated, cooled, ball milled, and sieved to obtain bulk aluminum, aluminum particles and secondary aluminum ash (the recovery rate of metallic aluminum is ≥90%);

[0066] The average particle size of the secondary aluminum ash is 200-300 mesh; the main components of the secondary aluminum ash are 60% aluminum oxide, 15% chloride salt, 14% aluminum nitride, 5% electrolyte, 5% metal aluminum, 1% of heavy metals and heavy metal oxides.

[0067] (2) Deamination

[0068] The secondary aluminum ash obtained in step (1) is leached in hot water at 80°C under stirring for 4 hours, after the reaction is completed, the generated ammonia gas is collected, and the remaining slurry after the ammonia gas is recovered;

[0069] The mass r...

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Abstract

The invention discloses an aluminum ash harmless recycling comprehensive treatment system and method. The method comprises the following steps that firstly, metal extraction is carried out on aluminumash through a metal extraction system to obtain large blocks of aluminum, aluminum particles and secondary aluminum ash; then deamination and fluorine-fixing are carried out on the secondary aluminumash through a deamination and fluorine-fixing system, then flotation and dewatering treatment are carried out through a flotation system and a dewatering system respectively, and after dehydration treatment, roasting treatment is carried out through a roasting system; and ammonia/ammonium salt, an electrolyte, industrial salt and aluminum oxide are correspondingly obtained. According to the aluminum ash harmless recycling comprehensive treatment system and method, all the components in the recycled aluminum ash can be fully recycled, complete harmless treatment can be carried out, moreover, no harmful substance is generated in the treatment process, the secondary pollution of the environment is avoided, and the application range of the recycled aluminum ash is greatly expanded; and the advantages of being easy to operate, low in cost, high in full utilization rate and good in application prospect are achieved.

Description

technical field [0001] The invention belongs to the technical field of aluminum metallurgy. Specifically, the invention relates to a comprehensive treatment system for harmless recycling of aluminum ash and a treatment method thereof. Background technique [0002] Aluminum ash is a solid waste produced in various stages of alumina electrolysis, casting, processing and secondary aluminum production. Aluminum ash has been included in the "National List of Hazardous Wastes", but it contains a large amount of resources such as aluminum, alumina, chloride salts, electrolytes, etc., which have high recovery and application value. [0003] According to statistics, 1 ton of aluminum will produce 10-50Kg of aluminum ash during the whole process of processing and application. According to the different aluminum products, the composition of aluminum ash produced has great changes. The main components of aluminum ash produced by electrolytic aluminum water directly producing remelted ...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 梁学民刘战生卢志锋
Owner 郑州鸿跃环保科技有限公司
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