Recovery processing method of aluminum profile surface oxidation treatment tank liquor

A surface oxidation treatment and recovery treatment technology, applied in chemical instruments and methods, anodic oxidation, sulfur trioxide/sulfuric acid, etc., can solve the problems of high production input equipment and raw material costs, inability to obtain purity, and impact on the environment, etc., to achieve large Environmental and economic benefits, maximized use of sulfuric acid, and simple treatment steps

Active Publication Date: 2021-11-02
佛山市三水凤铝铝业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the field of aluminum profile production, sulfuric acid oxidation is generally used for the surface oxidation treatment of aluminum profiles. When the concentration of aluminum ions in the bath reaches the limit value required by the process, it must be discharged and updated, resulting in a large amount of aluminum-containing sulfuric acid waste, which not only causes waste , will also affect the environment
In view of this, the current relatively mature sulfuric acid recovery process is the method of adding ammonium sulfate, adding ammonium sulfate to the aluminum-containing sulfuric acid waste liquid, and the aluminum ammonium sulfate formed by the reaction at low temperature is precipitated, and the aluminum ammonium sulfate and sulfuric acid are separated by centrifugation, so as to achieve recovery. The purpose of sulfuric acid, but the disadvantage of this method is that the cost of production input equipment and raw materials is high, and the output of aluminum ammonium sulfate is limited by the scale and environmental protection laws and regulations, the market capacity is small, and the product is not competitive. Ammonium sulfate will be mixed, the concentration of sulfuric acid is lower than the process requirements, and sulfuric acid needs to be added, and the efficiency of sulfuric acid cannot be maximized, resulting in an increase in the cost of recycling, or adding some additives, but the impurity removal and adsorption effect is poor, and high-purity sulfuric acid cannot be obtained
In addition, in the actual production of aluminum profiles, the gas with a certain temperature will be generated after the casting furnace, extruder, and spray curing furnace are finished. However, this part of the heat energy has not been rationally utilized, and there is still room for research.

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  • Recovery processing method of aluminum profile surface oxidation treatment tank liquor
  • Recovery processing method of aluminum profile surface oxidation treatment tank liquor
  • Recovery processing method of aluminum profile surface oxidation treatment tank liquor

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preparation example Construction

[0044] In one of the embodiments, the preparation method of the settling agent comprises the following steps:

[0045] Sodium hydroxide, carboxymethyl cellulose and titanium dioxide are mixed and ball-milled to obtain mixture A;

[0046] Add the auxiliary base material to the mixture A, heat to 50°C-85°C under the condition of stirring at 350r / min-1200r / min, and keep stirring for 25min-50min to obtain mixture B;

[0047] The mixture B is fully swollen in deionized water, then placed in an acidic solution, and stirred at 45°C-65°C for 15min-30min to obtain a porous mixture B;

[0048]After the porous mixture B is washed with deionization, it is placed in deionized water and shaken for 2h-4h, and after the steps of suction filtration and drying, a sedimentation agent is obtained. The sedimentation agent prepared by the present invention has a porous structure, and sodium hydroxide, carboxymethyl cellulose, and titanium dioxide can form a synergistic system to further adsorb alu...

Embodiment 1

[0068] 10g of smectite clay and 3g of polysilicate aluminum sulfate are mixed to obtain a purifying agent;

[0069] 25g of sodium hydroxide, 10g of carboxymethyl cellulose and 1g of titanium dioxide were mixed and ball-milled to obtain a mixture A with a particle size of 100 μm; 55g of auxiliary base material was added to the mixture A, and heated to 85°C, and continuously stirred for 50 minutes to obtain a mixture B; the mixture B was fully swollen in deionized water, then placed in a sulfuric acid solution with a concentration of 15%, and stirred at 45°C for 15 minutes to obtain a porous mixture B; After the porous mixture B is washed with deionization, it is then placed in deionized water and shaken for 2 hours, and after the steps of suction filtration and drying, a sedimentation agent is obtained for subsequent use;

[0070] Pass the bath solution after oxidation surface treatment of aluminum profiles with a sulfuric acid concentration of 131.5g / L and an aluminum ion conc...

Embodiment 2

[0077] A method for recovering and treating bath liquid for oxidation treatment on the surface of aluminum profiles, said method comprising the following steps:

[0078] 15g of smectite clay and 1g of polysilicate aluminum sulfate are mixed to obtain a purifying agent;

[0079] 15g sodium hydroxide, 10g carboxymethyl cellulose and 5g titanium dioxide were mixed and ball milled to obtain a mixture A with a particle size of 80 μm; 30g of auxiliary base material was added to the mixture A, and heated to 50°C, and continuously stirred for 25 minutes to obtain a mixture B; the mixture B was fully swelled in deionized water, then placed in a 15% acetic acid solution, and stirred at 45°C for 30 minutes to obtain a porous mixture B; After the porous mixture B is washed with deionization, it is then placed in deionized water and shaken for 2 hours, and after the steps of suction filtration and drying, a sedimentation agent is obtained for subsequent use;

[0080] Pass the bath solutio...

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Abstract

The invention provides a recovery processing method of aluminum profile surface oxidation treatment tank liquor. The tank liquor is processed by utilizing lipophilic filler, so that the existence of grease in the tank liquor is reduced, the aggregation of the tank liquor is reduced, and the subsequent use of a purifying agent and a settling agent is facilitated; and clay minerals in the purifying agent can form ion exchange with aluminum ions, the content of the aluminum ions can be effectively reduced by combining the flocculation effect of polysilicate aluminum sulfate, and then a remarkable metal adsorption effect is generated under the further enhanced adsorption effect of the settling agent. In addition, the recovery processing method is simple in processing step and easy to operate, the sulfuric acid efficiency can be maximized, the gas temperature of a casting furnace, an extruder and a spraying curing furnace is utilized, the actual production is combined, the production resources are reasonably utilized, the recovery processing cost is reduced, and positive progress is achieved.

Description

technical field [0001] The invention relates to the field of recovery and treatment of waste liquid, in particular to a method for recovery and treatment of bath liquid for surface oxidation treatment of aluminum profiles. Background technique [0002] In the field of aluminum profile production, sulfuric acid oxidation is generally used for the surface oxidation treatment of aluminum profiles. When the concentration of aluminum ions in the bath reaches the limit value required by the process, it must be discharged and renewed, resulting in a large amount of aluminum-containing sulfuric acid waste, which not only causes waste , will also affect the environment. In view of this, the current relatively mature sulfuric acid recovery process is to use the method of adding ammonium sulfate, adding ammonium sulfate to the aluminum-containing sulfuric acid waste liquid, and the aluminum ammonium sulfate formed by the reaction at low temperature is precipitated, and the aluminum amm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D21/22C25D11/08C01B17/90
CPCC25D21/22C25D11/08C01B17/901C01B17/904Y02P10/20
Inventor 陆承煌鲁炎卿李欢欢
Owner 佛山市三水凤铝铝业有限公司
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