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Aluminum ash recycling method, harmless aluminum ash and application thereof

A technology of aluminum ash and secondary aluminum, applied in the direction of improvement of process efficiency, removal of solid waste, etc., can solve the problems of no treatment measures for harmful substances, failure to solve fundamental problems, waste of resources, etc., to achieve better effluent quality, Good effect and fast flocculation speed

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

[0004] The traditional aluminum ash treatment process, from collection, storage, treatment to application, has no treatment measures for harmful substances, which poses a serious threat to the environment and belongs to the extensive treatment method
Or use landfill, which not only fails to solve the fundamental problem, but also wastes resources, which has huge environmental protection risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for recycling aluminum ash, comprising the steps of:

[0049] (1) 10 tons of aluminum ash (slag) is entered into the ball mill through a screen at a speed of 1 ton / h, and the large solid above the screen is manually crushed to screen out 0.5 tons of metal aluminum block. The lower aluminum ash (slag) enters the classifier after ball milling, and 1.5 tons of metallic aluminum particles are separated, wherein the aluminum content is 80%. The separated ash and dedusting ash are secondary aluminum ash, totaling 7.9 tons.

[0050] (2) Add 3.5 tons of secondary aluminum ash to the deamination machine, 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 1# exhaust valve, close 2 #Exhaust valve, open the steam valve, heat to 50°C, the material begins to react violently, a large amount of ammonia gas is discharged, close the steam valve, wait for 10 minutes, the reaction is gentle. ...

Embodiment 2

[0056] A method for recycling aluminum ash, comprising the steps of:

[0057] (1) Put 8 tons of aluminum ash (slag) at a speed of 0.8 tons / h into the ball mill through a sieve, and manually crush the large solids above the sieve to screen out 0.4 tons of metal aluminum nuggets. The lower aluminum ash (slag) enters the classifier after ball milling, and 1.2 tons of metallic aluminum particles are separated, wherein the aluminum content is 85%. The separated ash and dedusting ash are secondary aluminum ash, totaling 6.3 tons.

[0058] (2) Add 2.5 tons of aluminum ash to the deamination machine, add 0.015 tons of slaked lime powder, add 0.6 tons of dedusting water to 0.005 tons of sodium sulfate, add 0.2 tons of new water, open the 1# exhaust valve, close the 2# exhaust valve, Open the steam valve, heat to 40°C, the material starts to react violently, and a large amount of ammonia gas is discharged, close the steam valve, wait for 10 minutes, and the reaction is gentle. Open th...

Embodiment 3

[0062] A method for recycling aluminum ash, comprising the steps of:

[0063] (1) 12 tons of aluminum ash (slag) is entered into the ball mill through a screen at a speed of 1.5 tons / h, and the large solid above the screen is manually crushed to screen out 0.3 tons of metal aluminum block. After the lower aluminum ash (slag) passes through the ball mill, it enters the classifier and separates 1 ton of metal aluminum particles, wherein the aluminum content is 90%. The separated ash and dedusting ash are secondary aluminum ash, totaling 10.5 tons.

[0064] (2) Add 3.8 tons of aluminum ash to the deamination machine, 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 fresh water, open the 1# exhaust valve, and close the 2 #Exhaust valve, open the steam valve, heat to 70°C, the material starts to react, there is no violent phenomenon, there is ammonia gas, close the steam valve, wait for 10 ...

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Abstract

The invention discloses an aluminum ash recycling method, harmless aluminum ash and application thereof. During recovery, primary aluminum ash is pretreated firstly, and then innocent treatment of deamination, defluorination and heavy metal removal is carried out to obtain semi-finished aluminum ash; calcining and grinding are carried out on the semi-finished aluminum ash to obtain a ceramic lowerblank product; the semi-finished aluminum ash is mixed, formed and dried and can be used as steelmaking adjuvant series products such as a deoxidizing agent, a slag former, a molten steel modifier and a molten steel covering agent; and the semi-finished aluminum ash is mixed and aged by hydrochloric acid, sulfuric acid, calcium aluminate, lime and the like, and can be prepared into aluminum-containing series water purifying agents such as aluminium polychlorid, poly aluminum ferrous chloride, polyaluminum sulfate and the like. According to the method, aluminum resources are fully utilized, inthe utilization process, the aluminum ash is subjected to treatment of deamination and heavy metal removal firstly, and environmental harmlessness of aluminum ash utilization is achieved. Aiming at the characteristics of the aluminum ash, multiple practical ways of aluminum oxide in the aluminum ash are effectively realized, and other components in the aluminum ash are also recycled.

Description

technical field [0001] The invention belongs to the technical field of aluminum ash recycling, and in particular relates to an aluminum ash recycling method, harmless aluminum ash and applications thereof. Background technique [0002] In recent years, the state has increased its encouragement and support for the recycled metal industry. With the support of policy dividends, the utilization rate of scrap aluminum is also increasing, and the output of aluminum ash is also increasing. It is estimated that the output of aluminum ash in my country will be about 2 million tons in 2018, and it will grow at a rate of about 2% per year. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C22B7/04C22B1/00C22B21/00C22B1/24C21C7/076
CPCB09B3/00B09B5/00C22B7/04C22B1/005C22B21/0007C22B7/006C22B21/0069C22B21/0023C22B1/2406C21C7/076Y02P10/20
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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