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Aluminum ash deamination device and aluminum ash deamination process

A technology for aluminum ash and deamination, applied in the field of aluminum ash treatment, can solve the problems of high cost, low deamination efficiency of aluminum ash, difficult subsequent treatment, etc., and achieves extended service life, less operating noise, and improved heating efficiency and speed. Effect

Active Publication Date: 2021-03-30
四川科龙达环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above prior art, the present invention provides an aluminum ash deamination device and an aluminum ash deamination process to solve the problems of low deamination efficiency, high cost and difficult follow-up treatment of aluminum ash

Method used

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  • Aluminum ash deamination device and aluminum ash deamination process
  • Aluminum ash deamination device and aluminum ash deamination process
  • Aluminum ash deamination device and aluminum ash deamination process

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of aluminum ash deaminization process, comprises the following steps:

[0040] Add 3.5 tons of aluminum ash to the deamination unit, add 0.025 tons of quicklime powder, 0.01 tons of sodium thiosulfate, add 0.7 tons of dedusting water, add 0.3 tons of cleaning water, open the high-temperature exhaust valve, close the dedusting and exhaust valve, and heat the components The material was heated to 50°C, the material began to react violently, and a large amount of ammonia gas was discharged, and after waiting for 10 minutes, the reaction was gentle. Continue to add 0.5 tons of dedusting water and 1.5 tons of new water. After the temperature rises to 70°C, there is no violent reaction. Close the dedusting exhaust valve, and the pressure rises to 0.1Mpa. Partially open the pressure relief valve, and adjust the internal pressure to 0.15Mpa. Pressurize and react for 2.5 hours, open the dust removal exhaust valve, close the high temperature exhaust valve, open the unloadi...

Embodiment 2

[0042] A kind of aluminum ash deaminization process, comprises the following steps:

[0043] Add 2.5 tons of aluminum ash to the deamination unit, add 0.015 tons of slaked lime powder, 0.005 tons of sodium sulfate, add 0.6 tons of dedusting water, add 0.2 tons of new water, open the high-temperature exhaust valve, close the dedusting and exhaust valve, and heat the components to remove the material When heated to 40°C, the material began to react violently, and a large amount of ammonia gas was discharged. After waiting for 10 minutes, the reaction was gentle. Continue to add 0.5 tons of dedusting water and 0.7 tons of new water. After the temperature rises to 60°C, there is no violent reaction. Close the dedusting exhaust valve, and the pressure rises to 0.12Mpa. Partially open the pressure relief valve, and adjust the internal pressure to 0.18Mpa. Pressurize and react for 1.5 hours, open the dust removal exhaust valve, close the high temperature exhaust valve, open the unloa...

Embodiment 3

[0045] A kind of aluminum ash deaminization process, comprises the following steps:

[0046] Add 3.8 tons of aluminum ash to the deamination unit, add 0.05 tons of stone powder, 0.015 tons of magnesium sulfate, add 0.8 tons of dedusting water, add 0.3 tons of cleaning water, 0.4 tons of new water, open the high-temperature exhaust valve, close the dust removal and exhaust valve, The heating unit heats the material to 70°C, the material begins to react violently, and a large amount of ammonia gas is discharged. After waiting for 10 minutes, the reaction is gentle. Continue to add 0.6 tons of dedusting water, and add 1.2 tons of new water. After the temperature rises to 80°C, there is no violent reaction. Close the dedusting exhaust valve, and the pressure rises to 0.08Mpa. Partially open the pressure relief valve, and adjust the internal pressure to 0.12Mpa. Pressurize and react for 1.5 hours, open the dust removal exhaust valve, close the high temperature exhaust valve, open t...

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Abstract

The invention discloses an aluminum ash deamination device and an aluminum ash deamination process. The device comprises a closed cylinder, a feeding hole, a dust removal exhaust valve, a high-temperature exhaust valve, a pressure release valve and a water inlet are arranged at the upper portion of the outer part of the closed cylinder, a discharge port and a water outlet are formed in the lower portion of the outer part of the closed cylinder, and a heating part is arranged at the outer side of the closed cylinder; a central shaft is mounted on the axis of the closed cylinder and is connectedwith a speed reducer; rake teeth are arranged on the central shaft, and rake tooth blades are arranged at the top ends of the rake teeth; arc-shaped reinforcing plates are installed on the connectingportion of the central shaft and the rake teeth, and every two adjacent reinforcing plates can form a semi-arc-shaped structure; sweeping rods are mounted in rake tooth intervals at the same horizontal position; and two sweeping rods are arranged in total and are positioned in two opposite rake tooth intervals. According to the deamination process, the reaction temperature and pressure intensityof aluminum ash and a catalyst are controlled through the deamination device, and reaction conditions are flexibly adjusted in the reaction process, so that nitrogen in the aluminum ash is converted into ammonia gas, and the purpose of deamination is achieved.

Description

technical field [0001] The invention belongs to the technical field of aluminum ash treatment, and in particular relates to an aluminum ash deamination device and an aluminum ash deamination process. Background technique [0002] In recent years, with the continuous development of the recycled metal industry, the utilization rate of waste aluminum has also been continuously improved, and the output of aluminum ash has been increasing day by day. According to the content of metal aluminum in aluminum ash, it can be divided into primary aluminum ash and secondary aluminum ash. The aluminum slag picked out from the smelting furnace is called primary aluminum ash, which is off-white in appearance and is mainly a mixture of metal aluminum and aluminum oxide. The aluminum content can reach 15% to 70%, also known as "white aluminum "Ash"; secondary aluminum ash is the waste after extracting metal aluminum from primary aluminum ash. The main components are alumina, aluminum nitride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00Y02P10/20
Inventor 张志刚尹帮红李伟
Owner 四川科龙达环保股份有限公司
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