阅读说明：本技术 一种铝合金挤压模具残铝分离方法及设备 (Residual aluminum separation method and device for aluminum alloy extrusion die ) 是由 苏龙武 张鹏 刘登攀 薛鹏 朱国杰 甘斌 张超锐 黄规枝 梁尉宏 戴小杰 韦月萍 于 2020-09-25 设计创作，主要内容包括：本发明公开了一种铝合金挤压模具残铝分离方法及设备,包括碱洗、清洗、风干和入库,其中碱洗：铝合金模具挤压完后,先采用人工去除铝合金模具表面的铝合金,将模具传送进入碱洗槽进行两级碱洗,所述的碱洗过程是将挤压模具浸入碱洗槽内的二次碱洗液中进行一级碱洗,再将挤压模具浸入碱洗槽内的一次碱洗液中进行二级碱洗,采用碱液去除模具分流孔及焊合腔内的残留的铝合金。本发明可实现高效模铝分离。(The invention discloses a method and equipment for separating residual aluminum of an aluminum alloy extrusion die, which comprises alkali washing, cleaning, air drying and warehousing, wherein the alkali washing comprises the following steps: after the aluminum alloy die is extruded, manually removing the aluminum alloy on the surface of the aluminum alloy die, conveying the die into an alkaline washing tank for two-stage alkaline washing, wherein the alkaline washing process comprises the steps of immersing the extrusion die into secondary alkaline washing liquid in the alkaline washing tank for primary alkaline washing, immersing the extrusion die into primary alkaline washing liquid in the alkaline washing tank for secondary alkaline washing, and removing residual aluminum alloy in a shunting hole of the die and a welding cavity by using alkaline liquor. The invention can realize high-efficiency die aluminum separation.)

1. A method for separating residual aluminum of an aluminum alloy extrusion die is characterized by comprising the following steps: the method comprises the following steps of alkali washing, cleaning, air drying and warehousing, wherein the process comprises the following steps: (1) alkali washing: after the aluminum alloy die is extruded, manually removing the aluminum alloy on the surface of the aluminum alloy die, conveying the die into an alkaline washing tank for two-stage alkaline washing, wherein the alkaline washing process comprises the steps of immersing the extrusion die into secondary alkaline washing liquid in the alkaline washing tank for primary alkaline washing, then pumping out the secondary alkaline washing liquid in the alkaline washing tank, introducing primary alkaline washing liquid for secondary alkaline washing, and removing residual aluminum alloy in a shunting hole and a welding cavity of the die by using alkaline washing liquid, wherein the secondary alkaline washing liquid is sodium hydroxide with the weight concentration of 18-24%, and the primary alkaline washing time is 0.8-2.0 hours; the primary alkaline washing liquid is 25-30% of sodium hydroxide by weight concentration, and the secondary alkaline washing time is 2.0-4.0 hours; (2) cleaning: conveying the aluminum alloy extrusion die subjected to secondary alkali washing into a washing tank, and carrying out spray washing for 4-8 minutes by adopting water; (3) air drying: the mould enters a hot air drying chamber along a conveyor belt, and is dried by hot air through a blower; (4) repairing the mold: conveying the air-dried mold to a mold repairing area for maintenance; (5) warehousing: and warehousing and storing the die after the maintenance is qualified.

2. The method for separating the residual aluminum of the aluminum alloy extrusion die according to claim 1, characterized by comprising the following steps: al in the secondary alkaline washing liquid³⁺The concentration is 31 g/L-79 g/L, and the first-level alkaline washing time is 0.8-2.0 hours.

3. The method for separating the residual aluminum of the aluminum alloy extrusion die according to claim 1, characterized by comprising the following steps: al in the secondary alkaline washing liquid³⁺The concentration is more than 79g/L, the primary alkali washing time is 0.8 hour, and the secondary alkali washing time is 4.0 hour.

4. The method for separating residual aluminum of aluminum alloy extrusion die according to claim 1, wherein the method comprisesIs characterized in that: al in the secondary alkaline washing liquid³⁺The concentration is less than 31g/L, the primary alkali washing time is 2.0 hours, and the secondary alkali washing time is 2.0 hours.

5. The apparatus for separating residual aluminum of aluminum alloy extrusion die according to any of claims 1 to 4, characterized in that: the device comprises a primary alkali solution tank, an alkali washing tank, a secondary alkali solution tank, an alkali waste tank and a cleaning tank, wherein the primary alkali solution tank is communicated with the top of the alkali washing tank, the bottoms of the alkali washing tank and the secondary alkali solution tank are communicated with each other through a first pipeline, the first pipeline is also communicated with the alkali waste tank and the cleaning tank, a water suction pump is arranged on a primary pipeline between the alkali washing tank and the secondary alkali solution tank, a first valve is arranged at the connecting end of the bottom of the alkali washing tank and the first pipeline, a second valve is arranged at the connecting end of the top of the alkali washing tank and the primary alkali solution tank, and a third valve is arranged between the alkali; a fourth valve is arranged between the cleaning tank and the primary pipeline; a fifth valve is arranged between the secondary lye tank and the primary pipeline, and the system also comprises a master control system which is respectively connected with the water suction pump, the first valve, the second valve, the third valve, the fourth valve and the fifth valve.

6. The equipment for separating the residual aluminum of the aluminum alloy extrusion die according to the claim 5, characterized in that: the first-stage alkaline washing tank and the second-stage alkaline washing tank are both provided with a temperature measuring device and Al³⁺Concentration measuring apparatus, OH^-The concentration testing device and the heating device are respectively connected with the master control system.

Technical Field

The invention relates to the technical field of aluminum alloy refining, in particular to a method and equipment for separating residual aluminum of an aluminum alloy extrusion die.

Background

After the aluminum alloy profile is formed by the extrusion die, some aluminum alloy usually remains on the extrusion die, and in order to be able to use the extrusion die again for production, the aluminum alloy residues on the extrusion die must be removed. In the traditional method, an extrusion die is directly placed in an alkali tank, and alkali liquor and aluminum are subjected to chemical reaction, so that residual waste aluminum in the die is removed. The process method is characterized in that the aluminum alloy in the shunting holes and the welding cavities of the die are corroded and discharged by an alkali washing method. The process has the following disadvantages: 1. the degree of automation is not high. Each process step can be realized by manual carrying or hoisting, so that the working efficiency is not high, and the labor intensity of workers is high; 2. the mold boiling worker works in a relatively severe environment. Because the alkali washing tank is used for boiling the mold, a large amount of hot (generally about 92-120 ℃) and smelly alkali steam is generated during mold boiling due to chemical reaction; 3. the resources are wasted. The process has the disadvantages of long alkali washing time for treating the aluminum alloy remained in the die, large amount of caustic soda for reacting with the aluminum alloy, no recovery of the large amount of caustic soda and environmental pollution. Therefore, a great deal of steam is generated during the alkali washing, and the best method is to use an exhaust fan to exhaust a part of steam from the side surface of the alkali washing tank, so that a great deal of steam still rises to the space, which not only seriously pollutes the environment and influences the health of operators, but also greatly wastes resources (aluminum hydroxide).

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a method and equipment for separating residual aluminum of an aluminum alloy extrusion die, and can realize automatic and efficient separation of the residual aluminum of the aluminum alloy extrusion die.

In order to achieve the purpose, the method for separating the residual aluminum of the aluminum alloy extrusion die is realized by the following technical scheme:

a method for separating residual aluminum of an aluminum alloy extrusion die comprises alkali washing, cleaning, air drying and warehousing, and comprises the following steps: (1) alkali washing: after the aluminum alloy die is extruded, manually removing the aluminum alloy on the surface of the aluminum alloy die, conveying the die into an alkaline washing tank for two-stage alkaline washing, wherein the alkaline washing process comprises the steps of immersing the extrusion die into secondary alkaline washing liquid in the alkaline washing tank for primary alkaline washing, then pumping out the secondary alkaline washing liquid in the alkaline washing tank, introducing primary alkaline washing liquid for secondary alkaline washing, and removing residual aluminum alloy in a shunting hole and a welding cavity of the die by using alkaline washing liquid, wherein the secondary alkaline washing liquid is sodium hydroxide with the weight concentration of 18-24%, and the primary alkaline washing time is 0.8-2.0 hours; the primary alkaline washing liquid is 25-30% of sodium hydroxide by weight concentration, and the secondary alkaline washing time is 2.0-4.0 hours; (2) cleaning: conveying the aluminum alloy extrusion die subjected to secondary alkali washing into a washing tank, and carrying out spray washing for 4-8 minutes by adopting water; (3) air drying: the mould enters a hot air drying chamber along a conveyor belt, and is dried by hot air through a blower; (4) repairing the mold: conveying the air-dried mold to a mold repairing area for maintenance; (5) warehousing: and warehousing and storing the die after the maintenance is qualified.

Further, Al in the secondary alkaline washing liquid³⁺The concentration is 31 g/L-79 g/L, and the first-level alkaline washing time is 0.8-2.0 hours.

Further, Al in the secondary alkaline washing liquid³⁺The concentration is more than 79g/L, the primary alkali washing time is 0.8 hour, and the secondary alkali washing time is 4.0 hour.

Further, Al in the secondary alkaline washing liquid³⁺The concentration is less than 31g/L, the primary alkali washing time is 2.0 hours, and the secondary alkali washing time is 2.0 hours.

A separation device for residual aluminum of an aluminum alloy extrusion die comprises a primary alkali liquor tank, an alkali washing tank, a secondary alkali liquor tank, an alkali waste tank and a cleaning tank, wherein the primary alkali liquor tank is communicated with the top of the alkali washing tank; a fourth valve is arranged between the cleaning tank and the primary pipeline; a fifth valve is arranged between the secondary lye tank and the primary pipeline, and the system also comprises a master control system which is respectively connected with the water suction pump, the first valve, the second valve, the third valve, the fourth valve and the fifth valve.

Further, the alkaline washing tank is provided with a temperature measuring device and Al³⁺Concentration measuring apparatus, OH^-The concentration testing device and the heating device are respectively connected with the master control system.

The invention has the beneficial effects that:

the method and the device realize high-efficiency die aluminum separation by two-stage alkali washing in the production process, improve the utilization rate of alkali liquor, reduce the alkali washing time and improve the alkali washing efficiency.

Drawings

FIG. 1 is a schematic diagram of a two-stage alkaline washing structure of an aluminum alloy extrusion die according to the present invention;

FIG. 2 is a schematic structural diagram of an alkaline washing tank according to the present invention;

FIG. 3 is a control logic diagram of the general control system according to the present invention;

in the figure, 1-alkaline washing tank, 2-primary lye tank, 3-secondary lye tank, 4-waste lye tank, 7-washing tank and 5-heating device6-master control system, 8-first valve, 9-liquid level sensor, 10-temperature measuring device and 11-Al³⁺Concentration measuring device, 12-OH^-Concentration testing device, 13-second valve, 14-third valve 14, 15-fourth valve, 16-fifth valve 16, 17-water pump, 18-first pipeline.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

As shown in figure 1, the method for separating the residual aluminum of the aluminum alloy extrusion die comprises the following steps of alkali washing, cleaning, air drying and warehousing: (1) alkali washing: after the aluminum alloy die is extruded, manually removing the aluminum alloy on the surface of the aluminum alloy die, conveying the die into an alkaline washing tank 1 for two-stage alkaline washing, wherein the alkaline washing process comprises the steps of immersing the extrusion die into secondary alkaline washing liquid in the alkaline washing tank 1 for primary alkaline washing, then pumping out the secondary alkaline washing liquid in the alkaline washing tank 1, introducing the primary alkaline washing liquid for secondary alkaline washing, and removing residual aluminum alloy in a shunting hole and a welding cavity of the die by using alkaline washing liquid, wherein the secondary alkaline washing liquid is sodium hydroxide with the weight concentration of 18-24%, and the primary alkaline washing time is 0.8-1 hour; the primary alkaline washing liquid is 25-30% of sodium hydroxide by weight concentration, and the secondary alkaline washing time is 0.3-0.5 hour; (2) cleaning: conveying the aluminum alloy extrusion die subjected to secondary alkali washing into a washing tank 7, and carrying out spray washing for 4-8 minutes by adopting water; (3) air drying: the mould enters a hot air drying chamber along a conveyor belt, and is dried by hot air through a blower; (4) repairing the mold: conveying the air-dried mold to a mold repairing area for maintenance; (5) warehousing: and warehousing and storing the die after the maintenance is qualified.

In the present embodiment, if Al in the secondary alkaline washing solution is present³⁺The concentration is 31 g/L-79 g/L, and the first-level alkaline washing time is 0.8-2.0 hours.

In the present embodiment, if Al in the secondary alkaline washing solution is present³⁺The concentration is more than 79g/L, the primary alkali washing time is 0.8 hour, and the secondary alkali washing time is 4.0 hour.

In the present embodiment, if Al in the secondary alkaline washing solution is present³⁺The concentration is less than 31g/L, the primary alkali washing time is 2.0 hours, and the secondary alkali washing time is 2.0 hours.

The method realizes high-efficiency mold aluminum separation by two-stage alkali washing in the production process, improves the utilization rate of alkali liquor, reduces the alkali washing time by more than 10 percent and the alkali liquor consumption by more than 10 percent due to the same aluminum mold and residual aluminum quantity, and improves the alkali washing efficiency.

As shown in fig. 1, the aluminum alloy extrusion die residual aluminum separation equipment comprises a primary alkali liquor tank 2, an alkali washing tank 1, a secondary alkali liquor tank 3, an alkali waste tank 4 and a cleaning tank 7, wherein the primary alkali liquor tank 2 is communicated with the top of the alkali washing tank 1, the bottoms of the alkali washing tank 1 and the secondary alkali liquor tank 3 are communicated with each other through a first pipeline 18, the first pipeline 18 is also communicated with the alkali waste tank 4 and the cleaning tank 7, a water suction pump 17 is arranged on a primary pipeline between the alkali washing tank 1 and the secondary alkali liquor tank 3, a first valve 8 is arranged at the connecting end of the bottom of the alkali washing tank 1 and the first pipeline 18, a second valve 13 is arranged at the connecting end of the top of the alkali washing tank 1 and the primary alkali liquor tank 2, and a third valve 14 is arranged between the alkali; a fourth valve 15 is arranged between the cleaning tank 7 and the primary pipeline; a fifth valve 16 is arranged between the secondary lye tank 3 and the primary pipeline, and the system also comprises a master control system 6, wherein the master control system 6 is respectively connected with a water suction pump 17, a first valve 8, a second valve 13, a third valve 14, a fourth valve 15 and a fifth valve 16.

The method for separating residual aluminum of the aluminum alloy extrusion die comprises the following steps:

step 1, putting an aluminum alloy extrusion die to be treated into an alkaline washing tank 1, opening a first valve 8, a fifth valve 16 and a water suction pump 17, introducing secondary alkali liquor in a secondary alkali liquor tank 3 into the alkaline washing tank 1, closing the first valve 8, the fifth valve 16 and the water suction pump 17, and carrying out primary alkaline washing in the alkaline washing tank 1;

step 2, after the primary alkali washing is finished, opening a first valve 8 and a third valve 14, and introducing secondary alkali liquor into the waste alkali tank 4; closing the first valve 8 and the third valve 14;

and step 3: opening a second valve 13, communicating the primary alkali liquor tank 2 with the alkali washing tank 1, introducing the primary alkali liquor into the alkali washing tank 1, closing the second valve 13, and carrying out secondary alkali washing in the alkali washing tank 1;

and 4, step 4: after the secondary alkali washing is finished, opening the first valve 8 and the fifth valve 16, and introducing the alkali liquor after the secondary alkali washing into a secondary alkali liquor tank 3;

and 5: cleaning: conveying the aluminum alloy extrusion die subjected to secondary alkali washing into a washing tank 7, and carrying out spray washing for 4-8 minutes by adopting water; air drying: the mould enters a hot air drying chamber along a conveyor belt, and is dried by hot air through a blower; repairing the mold: conveying the air-dried mold to a mold repairing area for maintenance; warehousing: and warehousing and storing the die after the maintenance is qualified.

In a further preferred scheme, as shown in fig. 2, the alkaline washing tank 1 is provided with a liquid level sensor 9, a temperature measuring device 10 and Al³⁺Concentration measuring device 11, OH^-The concentration testing device 12 and the heating device are respectively connected with the master control system 6. The control strategy of the master control system 6 is shown in fig. 3, the liquid level sensor 9 is controlled to detect the liquid level of the alkali liquor in the tank through the master control system 6, then the heating device 5 is controlled to heat the alkali liquor in the tank of the main body equipment, the detection is carried out through the temperature measuring device, when the temperature of the alkali liquor reaches 98 ℃, the heating device 5 is closed, and when the temperature of the alkali liquor is lower than 92 ℃, the heating device 5 is opened; the master control system 6 passes through Al³⁺Concentration measuring device 11, OH^-The concentration testing device 12 collects Al in the alkali liquor³⁺Concentration and OH^-Concentration of Al³⁺The concentration is 0 g/L-79 g/L, OH^-When the concentration reaches 6 g/L-19 g/L, the heat preservation time is determined to be 120 minutes-240 minutes.

The device realizes high-efficiency mold aluminum separation by two-stage alkali washing in the production process, improves the utilization rate of alkali liquor, reduces the alkali washing time by more than 10 percent and the alkali liquor consumption by more than 10 percent due to the same aluminum mold and residual aluminum quantity, and improves the alkali washing efficiency. Through the automatic control of the temperature, the alkali washing reaction is further in a higher efficiency state, the chemical reaction efficiency is improved, and the chemical reaction time is shortened.

Although the invention has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.