TW201536684A - Method for recycling and reusing aluminum ashes and products thereof - Google Patents

Abstract

The present invention provides a method for recycling and reusing aluminum ashes and products thereof, in which unstable aluminum ashes are added into waste lye to be stabilized, and the resultant stabilized compositions (containing ammonia, potassium aluminate and the stabilized aluminum ashes) are utilized to provide products of economic value (containing ammonia water, ammonium sulfate, alum, polyaluminum chloride and aluminum sulfate), thereby fully improving the efficacy of recycling and reusing the aluminum ashes.

Description

Method for recycling aluminum ash and its products

The invention relates to a method for recycling and recycling aluminum ash and a product thereof, in particular to a product obtained by adding unsettled aluminum ash to waste alkali water, and then the aluminum ash can be stabilized, and then used to make economical use. The product of value is a unique, environmentally friendly and cost-effective invention.

According to the aluminum ash, the waste produced by the refining of aluminum, and the composition of the aluminum ash includes the reaction with nitrogen and oxygen in the air to form aluminum oxide and aluminum nitride, and at the time of high temperature refining and fuel The aluminum carbide produced by the gas reaction is the unreacted aluminum. The recycling industry mainly recovers and refines the aluminum component in the aluminum ash. Therefore, when the aluminum component in the aluminum ash is too small, the recycling company usually The aluminum ash is stacked or buried. Although these methods can temporarily apply the aluminum ash to the centralized placement treatment, if it is placed or buried for a long time, the aluminum ash contains aluminum nitride. When it comes into contact with water, it is easy to react and produce the smell of ammonia gas. In severe cases, it will penetrate into the groundwater and endanger the living environment of the fish. Therefore, this kind of aluminum ash treatment is not ideal.

The domestic invention patent 455514 aluminum ash recycling treatment method is discussed. The patented technology mainly adds aluminum ash with phosphoric acid and sulfuric acid to achieve the treatment of aluminum ash stabilization, and then adds a certain proportion of sand and cement to the aluminum ash. Forming a cement body for use in compartments, roads, protective walls and other projects; however, this patented technology can be used to recycle aluminum ash, but it achieves stabilized aluminum after reaction with phosphoric acid and sulfuric acid. Ash, in the chemical formula (AlN+H ₃ PO ₄ →AlPO ₄ +NH ₃ ), the product of ammonia gas is still produced, and the purpose of this patent technology is simply to stabilize the aluminum ash and add it to the cement body. In terms of technology, there is no sufficient use of the product after the reaction of aluminum ash.

Therefore, how can the aluminum ash be effectively treated after stabilization, and the products of the reaction can be utilized to produce various useful products. In view of this, the inventor of the present invention has been engaged in research and development experience in related fields for many years. Investigate the above-mentioned shortcomings and actively seek solutions according to the above requirements. After a long period of hard work and multiple tests, the present invention has finally been completed.

The inventor of this case has been engaged in research in related fields for many years. He has been thinking and testing how to fully recover unresolved aluminum ash. Finally, the inventor of this case has been engaged in R&D experience in related fields for many years, and is actively responding to the aforementioned needs. Seeking a solution, after a long period of hard work of research and testing, the present invention has finally been completed.

Accordingly, the main object of the present invention is to provide a method for recycling and recycling aluminum ash and a product thereof, which can reuse the unreacted aluminum ash in the stabilization process and reuse the product after the reaction. The manufacturing method can produce the desired product to fully recycle the recycler.

A secondary object of the present invention is to provide an aluminum ash recycling By using the method and its products, by fully recovering the aluminum ash, it is possible to avoid the aluminum ash being randomly placed or buried.

A further object of the present invention is to improve the economic value of aluminum ash recovery by fully recovering the aluminum ash.

Further, the object of the present invention is to recover waste materials such as waste alkali water, waste sulfuric acid, and waste hydrochloric acid in various industries, thereby obtaining an additive for forming various products, thereby saving cost and being more expensive. Those who achieve environmental benefits.

According to the above object, the method for recovering and recycling aluminum ash according to the present invention and the product thereof are mainly characterized in that the unresolved aluminum ash is added to the waste alkali water to carry out the stabilization treatment, and the product after the stabilization reaction is It contains ammonia, potassium aluminate and stabilized aluminum ash, and then reacts with water, waste sulfuric acid or waste hydrochloric acid to form economically valuable products of ammonia, ammonium sulfate, alum, polyaluminum chloride and aluminum sulfate. Achieving the benefits of fully recycling aluminum ash to recycling.

1‧‧‧Aluminum ash

2‧‧‧Products

201‧‧‧Ammonia

202‧‧‧A stable aluminum ash

203‧‧‧potassium aluminate solution

204‧‧‧ sodium aluminate solution

3‧‧‧ products

301‧‧‧Ammonia

302‧‧‧Ammonium sulphate

303‧‧‧Ming

304‧‧‧polyaluminum chloride

305‧‧‧Aluminium sulphate solution

4‧‧‧Waste alkali water

401‧‧‧Aqueous potassium hydroxide solution

402‧‧‧Sodium hydroxide solution

5‧‧‧ water

6‧‧‧Spent sulfuric acid

7‧‧‧Waste hydrochloric acid

8‧‧‧ catheter

801‧‧‧ gas valve

9‧‧‧Products

A‧‧‧ container

B‧‧‧ Container

C‧‧‧ Container

D‧‧‧ container

E‧‧‧ Container

Fig. 1 is a flow chart of the aluminum ash stabilization of the present invention.

Fig. 2 is a schematic view showing the operation of the aluminum ash stabilization of the present invention.

Fig. 3 is a flow chart showing the recovery and utilization of ammonia in the product of the present invention.

Fig. 4 is a schematic view showing the operation of the ammonia gas recovery and utilization of the present invention.

Fig. 5 is a schematic view showing the experiment of closing the gas valve of the present invention.

Fig. 6 is a flow chart showing the recovery and utilization of the potassium aluminate solution in the product of the present invention.

Fig. 7 is a schematic diagram showing the experiment of reacting the potassium aluminate solution of the present invention with waste sulfuric acid.

Figure 8 is a flow chart for recycling the stabilized aluminum ash of the present invention.

Fig. 9 is a schematic view showing the reaction of the stabilized aluminum ash and waste sulfuric acid of the present invention.

Fig. 10 is a schematic view showing the treatment of the stabilized aluminum ash and waste sulfuric acid reactant hydrogen of the present invention.

Fig. 11 is a general flow chart showing the addition of an aqueous solution of potassium hydroxide to the aluminum ash stabilization product and the product thereof.

Fig. 12 is a general flow chart showing that the additive of the present invention is mainly composed of an aqueous solution of sodium hydroxide to achieve aluminum ash stabilization and its products.

For a more detailed and detailed understanding of the purpose of the invention, the <RTIgt; Referring to FIG. 1 and FIG. 2, the present invention provides a method for recycling and recycling aluminum ash and a product thereof, firstly adding waste alkali water to an unfilled aluminum ash 1 container; wherein the waste The source of alkali water 4 is the waste alkali solution after cleaning process in various industries, for example, the sodium hydroxide alkaline solution used in the inspection of aluminum extrusion die, or the potassium hydroxide alkali used in the process of solar cleaning and wafer cleaning. In the following examples, the potassium hydroxide aqueous solution 401 is mainly used as the reactant of the stabilized aluminum ash 1, and the container containing the unsettled aluminum ash 1 is added to the waste alkali water 4 (the waste alkali water 4 before the addition) The instrument will first check whether the concentration ratio meets the standard of use. The waste alkali water 4 here uses the potassium hydroxide aqueous solution 401 as an additive for the reaction. If the potassium hydroxide aqueous solution 401 does not meet the required concentration, Adding a potassium hydroxide aqueous solution 401 having a higher concentration to the solution), first adding a potassium hydroxide aqueous solution 401 having a concentration of about 1 M to 3 M, wherein the ratio of the aluminum ash 1 to the potassium hydroxide aqueous solution 401 is about 1:5, and When the thermometer is detected at a temperature of about 80 ° C, it is turned on. After heating and stirring for about two hours, since the aluminum ash 1 contains aluminum nitride, aluminum oxide, aluminum carbide and a little aluminum component, the unstabilized aluminum ash 1 is contacted with the potassium hydroxide aqueous solution 401, and then ammonia is reacted. Gas 201, potassium aluminate solution 203 (referring to the upper clear liquid) and stabilized aluminum ash 202 (referring to the precipitate below), etc., the reaction chemical formula is as follows: aluminum nitride + potassium hydroxide aqueous solution → potassium aluminate +Ammonia: AlN+KOH+3H ₂ O→KAl(OH) ₄ +NH ₃

Aluminum carbonate + potassium hydroxide aqueous solution → potassium aluminate + methane: Al ₄ C ₃ + 4KOH + 12H ₂ O → 4KAl(OH) ₄ + 3CH ₄

Alumina + Potassium Hydroxide Solution → Potassium Aluminate: Al ₂ O ₃ + 2KOH + 3H ₂ O → 2KAl(OH) ₄

Aluminum + potassium hydroxide aqueous solution → potassium aluminate + hydrogen: Al + KOH + 3H ₂ O → KAl (OH) ₄ + 3 / 2H ₂

Referring to FIG. 3 and FIG. 4, the flow and method for recycling and utilizing the ammonia gas 201 in the product 2 of the present invention, and referring to FIG. 1 at the same time, as shown in the figure, the aluminum ash 1 is firstly described. The ammonia gas 201 generated during the stabilization process is diverted from the conduit 8 to the vessel a containing the water 5, so that the water 5 absorbs the ammonia gas 201 and the water 5 is transformed into the ammonia water 301, and the density of the ammonia water 301 is measured by the instrument. When it reaches 0.7 to 0.9 g/cm ³ , it means that the ammonia water 301 reaches a saturated state (about 30% to 35%), and at this time, the ammonia water 301 is the product 3 of the present invention. When the excess ammonia gas 201 can be further discharged from the vessel a through the conduit 8 into the vessel b containing the spent sulfuric acid 6 (where the source of the spent sulfuric acid 6 is the waste sulfuric acid solution after the relevant sulfuric acid treatment process is used, For example, the waste sulphuric acid liquid after the use of the method for cleaning the surface of the wafer by using a sulfuric acid plant, if the concentration of the waste sulfuric acid 6 is detected to be inconsistent with the concentration ratio, a certain amount of concentrated sulfuric acid is added to be formulated), in the container b The ammonia gas 201 reacts with the spent sulfuric acid 403 to form ammonium sulfate 302. At this time, the ammonium sulfate 302 is the product 3 of the present invention. Therefore, after the unsettled aluminum ash 1 is added to the waste alkali water 4 of the potassium hydroxide aqueous solution 401 via the present invention, in addition to the product ammonia gas 201, the ammonia gas 201 can be produced by the method of the present invention. Product 3 such as ammonia water 301 and ammonium sulfate 302.

However, in the process of forming the ammonia gas 201 into the product 3 such as the ammonia water 301 and the ammonium sulfate 302, the valve 8 for guiding the ammonia gas 201 is provided with a gas valve 801 or a valve for restricting gas circulation, mainly for stopping. Since the ammonia gas 201 is used for the flow of the ammonia gas 201, when the water 5 in the container a absorbs the ammonia gas 201 and becomes the ammonia water 301, when the saturated state is reached, the supply of the ammonia gas 201 can be stopped by closing the gas valve 801, and the compliance is met. After the standard ammonia water 301 is taken out from the container a, the fresh water 5 solution is replaced to continue the reaction. Moreover, when the waste sulfuric acid 6 of the container b containing the spent sulfuric acid 6 is reacted with the ammonia gas 201 to form the ammonium sulfate 302, the pH value of the waste sulfuric acid 6 can be raised from the original value of less than 1 to the pH value 4~ When between 6, to determine whether the ammonium sulfate 302 formed in the reaction in the container b has reached the equivalent point (ie, saturated state), when the equivalent point is reached, the gas valve 801 can be closed to stop the supply of the ammonia gas 201, such as 6 shows, after the ammonium sulfate 302 product 3 produced by the reaction is taken out from the container b, and then the waste sulfuric acid 6 solution re-added in the container b, if the reaction is to be continued, the gas valve 801 for supplying the ammonia gas 201 can be further supplied. Open and repeat the above steps; the reaction formula is as follows: ammonia + waste sulfuric acid → ammonium sulfate: 2NH ₃ + H ₂ SO ₄ → (NH ₄ ) ₂ SO ₄

In addition to the ammonia gas 201 can be introduced into the container a containing the water 5 and re-conducted to the container b containing the waste sulfuric acid 6, the ammonia gas 201 can be separately guided to the container a containing the water 5 or The container b containing spent sulfuric acid 6 is used to achieve the benefit that the user can react according to the demand of ammonia 301 or ammonium sulfate 302 to form the desired product 3.

Referring to FIG. 6 and FIG. 7 together with reference to FIG. 1 , the flow and method for recycling and utilizing the potassium aluminate solution 203 in the product 2 formed by the reaction after the aluminum ash 1 is stabilized, As can be seen from the figure, the potassium aluminate solution 203 is first placed in a container c, and the waste sulfuric acid 6 is slowly added by means of a separating funnel in a drip manner (the source of the waste sulfuric acid 6 here, as described above, According to the pH value or appearance of the reaction, it can be judged whether the product 3 of alum 303 has been formed, and the detailed reaction formation method and process are as follows: when the pH of the potassium aluminate solution 203 before the reaction is generally about 12~13 or so, when the potassium aluminate solution 203 in the container c is dropped through the waste sulfuric acid 6, a small amount of white aluminum hydroxide is generated, and if it is stirred, the clear yellowish solution is recovered, and the drop is continued. After adding waste sulfuric acid 6, when the pH value in the container reaches between 6 and 10, the white aluminum hydroxide is produced most, and the solution in the whole container is reacted into a milky white shape. White precipitate begins to disappear continuously when the pH reaches When the solution is about 1.5~2.5, the whole solution is restored to the original clear yellowish solution. In this state, the reaction produces an alum solution. The reaction chemical formula is as follows: potassium aluminate + waste sulfuric acid → alum + water: KAl (OH) ) ₄ +2H ₂ SO ₄ →KAl(SO ₄ ) ₂ +4H ₂ O

"The following is the reaction process between potassium aluminate and spent sulfuric acid during the experiment:

1 The reaction process when the waste sulfuric acid is started to be dropped: Al(OH) ₄ +H ⁺ →Al(OH) ₃ +H ₂ O

2 Continue to add waste sulfuric acid, so that the pH value of the solution reaches between 6 and 10: Al(OH) ₃ +3H ⁺ →Al ³⁺ +3H ₂ O

3 Continue to add waste sulfuric acid to make the pH of the solution reach 1.5~2.5: K ⁺ Al ³⁺ SO ₄ ² + H ₂ O → KAl(SO ₄ ) ₂ ‧12H ₂ O

Finally, the alum solution formed by the reaction is added to a trace amount of alum crystal, and the alum material in the alum solution can be polymerized out into the alum crystal by the polymerization principle. At this time, the alum crystal is taken out, which is the alum made by the invention. 303 product 3.

In addition, in the reaction step of the waste sulfuric acid 6 and the potassium aluminate solution 203, the waste sulfuric acid 6 may be replaced by the waste hydrochloric acid 7 to be reacted (wherein the source of the waste hydrochloric acid 7 is the related hydrochloric acid solution after the hydrochloric acid treatment process) For example, the waste hydrochloric acid solution after the use of the aluminum extrusion type gloss removal process, etc., the reaction process and the procedure of the waste hydrochloric acid 7 are the same as the process of using the waste sulfuric acid 6 in the reaction process of the above alum 303 product, via the waste hydrochloric acid. 7 When there is a drop, there is a little white aluminum hydroxide gel. If it is stirred, the clarified pale cyan solution will be recovered, and after the addition of the waste hydrochloric acid 7 is continued, the pH value in the container will be between 6 and 10. At this time, the white aluminum hydroxide is produced most, and the solution in the whole container is reacted into a milky white shape. After the addition of the waste hydrochloric acid 7, the white precipitate in the container begins to disappear continuously, when the pH reaches 1.5 to 2.5. When the whole solution is restored to the original clarified pale cyan solution, the solution can react with the product 3 of polyaluminum chloride 304 (abbreviated as PAC), and its reaction chemical formula is as follows: potassium aluminate + waste hydrochloric acid → polyaluminum chloride + chlorination potassium + _{water: 2KAl (OH) 4 + (} 8-m) HCl _{Al 2 (OH) mCl 6-} m + 2KCl + (8-m) H 2 O

When the waste sulfuric acid 6 or the waste hydrochloric acid 7 and the potassium aluminate solution 203 are reacted, the product 3 of the alum 303 and the polyaluminum chloride 304 can be respectively obtained, so that the potassium aluminate solution 203 can fully achieve the benefit of recycling.

Continuing to refer to Figures 8 and 9 for the recycling process of the stabilized aluminum ash 202 in the product 2, the stabilized aluminum ash 202 component contains alumina and a little unreacted aluminum. First, the stabilized aluminum ash 202 can be added to the container d containing the water 5, and the ratio of the stabilized aluminum ash 202 to the water 5 is about 1:2, and is slowly dripped by the separating funnel. The added sulfuric acid 6 is added in a concentration of 60% to 80%, wherein the amount of the waste sulfuric acid 6 is instilled, and if the ratio of 200 g of aluminum ash and 400 g of distilled water is added, the solution of the spent sulfuric acid 6 is about 100~120 ml; after dropping the appropriate waste sulfuric acid 6 solution, the solution in the container d is reacted to form an aluminum sulfate solution 305 and a trace amount of hydrogen by stirring, and the reaction chemical formula is as follows: alumina + waste sulfuric acid → aluminum sulfate + water: Al ₂ O ₃ +3H ₂ SO ₄ →Al ₂ (SO ₄ ) ₃ +3H ₂ O

Aluminum + waste sulfuric acid → aluminum sulfate + hydrogen: 2Al + 3H ₂ SO ₄ → Al ₂ (SO ₄ ) ₃ + 3H ₂

After the reaction solution is filtered, an aluminum sulfate solution 305 having a concentration of about 15% to 20% can be obtained, and the aluminum reacts with the spent sulfuric acid 6 to form a trace amount of acidic hydrogen, which can be introduced into the water by the conduit 8. In the container e, as shown in Fig. 10, to prevent the user from breathing the pungent acid gas.

In addition, the stabilized aluminum ash 202 may also be added to the waste hydrochloric acid 7 (where the source of the spent hydrochloric acid 7 is as described above, which is not described above) to react to produce the desired polyaluminum chloride 304 (abbreviated as PAC) product. Firstly, the stabilized aluminum ash 202 is placed in a container, and the waste hydrochloric acid 7 solution having a concentration of about 10% to 15% is dropped into the batch by a separating funnel, and after stirring, the polyaluminum chloride 304 is obtained. a by-product of hydrogen, wherein the amount of the stabilized aluminum ash 202 and the waste hydrochloric acid 7 is used. If 100 grams of the aluminum ash to be reacted is used, the amount of the waste hydrochloric acid 7 solution added is about 400 to 450 ml, and the reaction will be carried out. After the solution is filtered, about 350-400 ml of polyaluminum chloride solution 304 can be obtained, and the reaction chemical formula is as follows: alumina + waste hydrochloric acid → polyaluminum chloride: Al ₂ O ₃ + (6-m) HCl + ( M-3)H ₂ O→Al ₂ (OH)mCl _6-m

Aluminum + waste hydrochloric acid → polyaluminum chloride + hydrogen: 2Al + (6-m) HCl + mH ₂ O → Al ₂ (OH) mCl _6-m + 3H ₂

The trace amount of hydrogen which is reacted with aluminum hydroxide 7 can be introduced into the container containing water 5 through the conduit 8 to prevent the user from breathing the pungent acid gas; in addition, the unreacted aluminum ash It can also be used as a promoter for steelmaking (AD powder) or with high-alumina for electric slag; among them, the method for preparing a steelmaking accelerator (AD powder) is to firstly unreact aluminum ash. After dehydration treatment, the excess water is removed to maintain a certain humidity state of the unreacted aluminum ash, and then the coagulant is added to make the unreacted aluminum ash into a granular form by machine, and finally applied to the drying process. (drying method) to obtain a promoter (AD powder) for steelmaking; by the above, it is known that the reaction of waste sulfuric acid 6 or waste hydrochloric acid 7 with stabilized aluminum ash 202 can respectively obtain aluminum sulfate solution 305. And the product 3 of the polyaluminum chloride 304, so that the stabilized aluminum ash 202 can fully achieve the benefits of recycling.

Referring to FIG. 11 , in summary, the unstabilized aluminum ash 1 can be used to produce the product 2 after adding the reactant of the spent caustic water 4 (ie, potassium hydroxide aqueous solution 401) by using the present invention. Externally (i.e., ammonia gas 201, potassium aluminate solution 203, and stabilized aluminum ash 202), the product 2 can also be separately reacted to obtain product 3 as follows:

Namely: 1 product ammonia gas part:

a. Product 3 of ammonia 301 can be obtained by absorption of the water 5 solution.

b. Product 3 of ammonium sulfate 302 can be obtained by absorption of spent sulfuric acid 6.

2 product potassium aluminate 203 part:

a. The product 3 of alum 303 can be obtained by adding waste sulfuric acid 6 to react.

b. The product 3 of polyaluminum hydride 304 is obtained by adding waste hydrochloric acid 7 to react.

3 settled aluminum ash 202 part:

a. The product 3 of the aluminum sulfate solution 305 can be obtained by adding waste sulfuric acid 6 to the reaction.

b. The product 3 of polyaluminum hydride 304 is obtained by adding waste hydrochloric acid 7 to react.

Referring to FIG. 12, another embodiment of the recovery method for stabilizing the unsettled aluminum ash 1 of the present invention is mainly the waste alkali water 4 in this embodiment as an aqueous solution of sodium hydroxide. As a reactant of diazepam ash 1, a sodium hydroxide aqueous solution 402 having a concentration of about 1 M to 3 M is added to a container containing unstabilized aluminum ash, wherein the ratio of the aluminum ash 1 to the aqueous sodium hydroxide solution 402 is about 1. :5, and when the temperature is about 80 °C detected by a thermometer, after heating and stirring for about two hours, the aluminum ash 1 contains aluminum nitride, aluminum oxide, aluminum carbide and a little aluminum, so that the unsettled aluminum ash is made. When 1 is contacted with the aqueous sodium hydroxide solution 402, the product 9 of the ammonia gas 201, the sodium aluminate 204 (referring to the upper clear liquid), and the stabilized aluminum ash 202 (referring to the lower precipitate) is reacted. The chemical formula is as follows: Aluminum nitride + sodium hydroxide aqueous solution → sodium aluminate + ammonia gas: AlN + NaOH + 3H ₂ O → NaAl (OH) ₄ + NH ₃

Aluminum Carbide + Sodium Hydroxide Solution → Sodium Aluminate + Methane: Al ₄ C ₃ + ₄ NaOH + 12H ₂ O → 4NaAl(OH) ₄ + 3CH ₄

Alumina + sodium hydroxide aqueous solution → sodium aluminate: Al ₂ O ₃ + ₂ NaOH + 3H ₂ O → 2NaAl (OH) ₄

Aluminum + sodium hydroxide aqueous solution → sodium aluminate + hydrogen: Al + NaOH + 3H ₂ O → NaAl (OH) ₄ + 3 / 2H ₂

The method and the flow of the ammonia gas 201 in the product 9 after the reaction can be re-formed into the ammonia water 301 and the ammonium sulfate 302, and the method and the flow of the stabilized aluminum ash 202 into the aluminum sulfate 305 and the polyaluminum chloride 304 There is also a method and a process for preparing alumite 303 and polyaluminum chloride 304 by using sodium aluminate 204, which is the same as the process and steps described in the first embodiment of the process for reprocessing and recycling of the product 2 after the reaction. An embodiment is omitted, and the only difference is that the chemical formula of sodium aluminate 204 and alum 303 and polyaluminum chloride 304 are slightly different, and the reaction chemical formula is as follows: sodium aluminate + waste sulfuric acid → alum +Water: NaAl(OH) ₄ +2H ₂ SO ₄ →NaAl(SO ₄ ) ₂ +4H ₂ O

Sodium aluminate + spent hydrochloric acid → polyaluminum chloride + sodium chloride + water: 2NaAl(OH) ₄ +(8-m)HCl→Al ₂ (OH)mCl _6-m +2NaCl+(8-m)H ₂ O

According to the above reaction process, the waste alkali water, waste sulfuric acid and waste hydrochloric acid may also be replaced by unused pure liquid (for example: pure sulfuric acid, pure hydrochloric acid and undiluted sodium hydroxide or potassium hydroxide solution). ). However, when the concentration of the waste alkali water, the waste sulfuric acid and the waste hydrochloric acid liquid is insufficient according to the reaction ratio of the present invention, the pure liquid may be additionally added to achieve the desired concentration value, and the waste liquid recovery can be achieved by this method. In addition to environmental protection claims, it can also reduce implementation costs and improve economic efficiency.

In summary, the present invention mainly adds unstabilized aluminum ash to waste alkali water (where the waste alkali water can be an aqueous potassium hydroxide solution or an aqueous sodium hydroxide solution) to achieve the purpose of stabilized aluminum ash, and stabilizes the aluminum ash. The product formed by the reaction, such as ammonia, potassium aluminate (or sodium aluminate), and stabilized aluminum ash, etc., is then made into an economical product, such as ammonia, with water, waste sulfuric acid, and waste hydrochloric acid. It can be reconstituted into ammonia and ammonium sulfate for soil nutrient; stabilized aluminum ash can be re-formed into aluminum sulfate and polyaluminum chloride for purifying water; potassium aluminate or sodium aluminate can be re-purified to purify water In addition to polyaluminum chloride, it can also be used as a multi-purpose alum for bulking agents and natural deodorants; and unreacted aluminum ash after reaction with waste sulfuric acid or waste hydrochloric acid can also be used as steelmaking. The accelerator (AD powder) or the electric slag is extracted into high alumina soil; after the unstabilized aluminum ash is passed through the process of stabilization, the product formed by stabilization is further prepared into other products with economic value. To achieve full recycling of aluminum ash, Optionally aluminum ash can be avoided in a heap or placed where the cover buried occurs, in fact, one of aluminum ash recycling industry initiative large invention.

In summary, the method for recycling and recycling aluminum ash of the present invention and its production The object is designed by the inventor of this case with careful use of brain power. It not only has practical effects, but also improves the reuse of aluminum ash resources, increases value, and reduces environmental pollution. It is in line with patent law invention patents, and applications are made according to law. The bureau’s reviewer, Ming Jian, granted the patent and was actually praying.

However, the above description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, and the equivalent structural changes of the present invention and the scope of the patent application are all included. Within the scope of the present invention, it is combined with Chen Ming.

1‧‧‧Aluminum ash

2‧‧‧Products

201‧‧‧Ammonia

202‧‧‧A stable aluminum ash

203‧‧‧potassium aluminate solution

4‧‧‧Waste alkali water

401‧‧‧Aqueous potassium hydroxide solution

Claims (8)

The invention relates to a method and a product for recycling and recycling aluminum ash, which mainly comprises adding unsettled aluminum ash to a waste alkali water for stabilization treatment, and the waste alkali water uses potassium hydroxide aqueous solution as a main reaction additive. In the process of stabilization, a product such as ammonia gas, potassium aluminate solution, and stabilized aluminum ash is produced, and the products are used to produce an economically valuable product. The reaction is produced as follows: ammonia The gas can be introduced into a container filled with water to make the ammonia gas and the water reach a saturated state to form ammonia water, and the ammonia gas can be introduced into the container containing the waste sulfuric acid to react the ammonia gas with the waste sulfuric acid to form ammonium sulfate; The potassium aluminate solution is subjected to a chemical reaction by dropping the sulfuric acid into a droplet, and after stirring, an alum aqueous solution is obtained, and then the alum crystal is polymerized, and the alum crystal is obtained by taking out the alum crystal; in addition, the aluminum is obtained. The potassium acid solution can also be used to carry out a chemical reaction by using a drop of hydrochloric acid into a droplet. The solution of the reaction solution can be filtered to obtain a polyaluminum chloride product; the stabilized aluminum ash can be mixed with aluminum ash. After a certain proportion of water, the waste sulfuric acid is further chemically reacted by droplets. After stirring and filtering the solution, the aluminum sulfate solution product can be obtained; in addition, the stabilized aluminum ash can also be used as the waste hydrochloric acid. The chemical reaction is carried out by means of droplet introduction, and the polyaluminum chloride product can be obtained after the reaction; and the unreacted stabilized aluminum ash can be used as a promoter for steelmaking (AD powder) or with electric slag. Refined into high alumina By the above method, the invention has the function of adding unsettled aluminum ash to the waste alkali water to achieve stabilization, and also reacting the aluminum ash in the stabilization process to produce ammonia, potassium aluminate solution and The stabilized aluminum ash is further made into an economical product by using water, waste sulfuric acid and waste hydrochloric acid, for example, ammonia gas can be re-formed into ammonia and ammonium sulfate for soil nutrient; The stabilized aluminum ash can be re-formed into aluminum sulfate and polyaluminum chloride for purifying water; the potassium aluminate solution can be made into a leavening agent in addition to polyaluminum chloride for purifying water quality. A multi-purpose alum such as a natural deodorant; and an unreacted aluminum ash which has been reacted with waste sulfuric acid or waste hydrochloric acid, can also be used as a promoter for steelmaking (AD powder) or with high-alumina for electric slag. After the unstabilized aluminum ash is passed through the process of stabilization, the product formed by the stabilization is further processed into products having economical value to achieve the benefits of fully recycling the aluminum ash. The invention relates to a method and a product for recycling and recycling aluminum ash, which mainly comprises adding unsettled aluminum ash to a waste alkali water for stabilization treatment, and the waste alkali water system uses sodium hydroxide aqueous solution as a main reaction additive. In the process of stabilization, a product such as ammonia gas, sodium aluminate solution and stabilized aluminum ash is formed, and the products are used to produce products of economic value. The reaction generation method is as follows: Ammonia gas can be introduced into a container filled with water to make ammonia and water reach saturation state to form ammonia water, and ammonia gas can be introduced into a vessel containing waste sulfuric acid to react ammonia gas with waste sulfuric acid to form ammonium sulfate. ; The sodium aluminate solution is used to carry out a chemical reaction by dropping the sulfuric acid into droplets, and after stirring, an alum aqueous solution is obtained, and then the alum crystal is polymerized, and the alum crystal is obtained by taking out the alum crystal; in addition, the aluminum is obtained. The sodium solution can also be used to carry out a chemical reaction by using a drop-in method of separating hydrochloric acid. After filtering the solution, a polyaluminum chloride product can be obtained; and the stabilized aluminum ash can be mixed with a specific proportion of water. The waste sulfuric acid is further subjected to a chemical reaction by droplet dropping, and after stirring and filtering the solution, an aluminum sulfate solution product can be obtained; in addition, the stabilized aluminum ash can also be used to drop the waste hydrochloric acid into droplets. The chemical reaction is carried out, and after the reaction, the polyaluminum chloride product can be obtained; and the unreacted stabilized aluminum ash can be used as a promoter for steelmaking (AD powder) or with high-alumina for electric slag. By the above method, the invention has the function of adding unsettled aluminum ash to the waste alkali water to achieve stabilization, and also reacting the aluminum ash in the stabilization process to produce ammonia gas and sodium aluminate solution. And The determined aluminum ash is further made into an economical product by using water, waste sulfuric acid and waste hydrochloric acid, for example, ammonia gas can be re-formed into ammonia water and ammonium sulfate for soil nutrient; The stabilized aluminum ash can be re-formed into aluminum sulfate and polyaluminum chloride for purifying water; the sodium aluminate solution can be made into a leavening agent in addition to polyaluminum chloride for purifying water quality. A multi-purpose alum such as a natural deodorant; and an unreacted aluminum ash which has been reacted with waste sulfuric acid or waste hydrochloric acid, can also be used as a promoter for steelmaking (AD powder) or with electric earth slag After the process of setting up the high-alumina soil, the unresolved aluminum ash is passed through the process of stabilization, and the product formed by the stabilization is further processed into products of economic value to achieve full aluminum ash. The benefits of recycling. The method for recovering and recycling aluminum ash according to claim 1 and the product thereof, wherein the ratio of the unstabilized aluminum ash to the potassium hydroxide aqueous solution is about 1:5, and the concentration of the added potassium hydroxide aqueous solution is about 1 M~ 3M. The method and product for recovering and recycling aluminum ash according to claim 2, wherein the ratio of the unstabilized aluminum ash to the aqueous sodium hydroxide solution is about 1:5, and the concentration of the added aqueous sodium hydroxide solution is about 1 M~ 3M. The method for recovering and recycling aluminum ash according to claim 1 or 2, wherein the ratio of aluminum ash to water is about 1:2 during the reaction of the stabilized aluminum ash with waste sulfuric acid. The concentration of waste sulfuric acid is about 60%~80%, wherein the amount of waste sulfuric acid dropped is as follows, according to the comparison of 200 grams of aluminum ash and 400 grams of distilled water, the added waste sulfuric acid solution is about 100~120. ML. The method for recovering and recycling aluminum ash according to claim 1 or 2, wherein the concentration of the spent hydrochloric acid added during the reaction between the stabilized aluminum ash and the waste hydrochloric acid is about 10% to 15%, wherein The aluminum ash and the waste hydrochloric acid are used in a small amount. If 100 g of the aluminum ash to be reacted is used, the amount of the waste hydrochloric acid added is about 400 to 450 ml, and the solution after the reaction is filtered to obtain about 350 to 400 ml. Polyaluminum chloride solution. A method and product for recycling aluminum ash as claimed in claim 1 or 2, Wherein the unreacted aluminum ash remaining after the stabilized aluminum ash is reacted with waste hydrochloric acid or waste sulfuric acid, and the method for preparing the steelmaking accelerator (AD powder) is to first unreacted aluminum The ash is dehydrated, the excess water is removed, and the unreacted aluminum ash is kept in a certain humidity state, and then the coagulant is added to make the unreacted aluminum ash into a granular form by machine, and finally applied. Drying treatment (drying method) to obtain a promoter (AD powder) for steelmaking. The method for recovering and recycling aluminum ash according to claim 1 or 2, wherein the waste alkali water, waste sulfuric acid and waste hydrochloric acid are also replaced by an unused pure liquid (for example: pure sulfuric acid, pure Hydrochloric acid and undiluted sodium hydroxide or potassium hydroxide solution), and when the concentration of the waste alkali water, the waste sulfuric acid and the waste hydrochloric acid liquid is insufficient according to the reaction ratio of the present invention, an additional pure liquid may be added to achieve The required concentration value can not only meet the environmental protection requirements of waste liquid recovery, but also reduce the implementation cost and improve the economic efficiency.