CN107976063A - A kind of magnesium alloy melting and heat preservation stove with recycling - Google Patents

Abstract

The invention discloses a kind of magnesium alloy melting and heat preservation stove with recycling, including smelting furnace furnace body, feeding port, mixing pump, dnockout pumps, dnockout pumps expects pipe, crucible, crucible partition plate, electronic box and pump chamber heating unit, useless magnesium is recycled and is combined with melting the process of casting by the present apparatus, the die casting of product can directly be carried out by realizing the useless magnesium liquid of recycling, without being frozen into magnesium ingot；And can accomplish the requirement for making the useless magnesium liquid of recycling reach standard magnesium liquid, indices data reach professional standard.

Description

A magnesium alloy melting and holding furnace with recovery function

technical field

The invention belongs to the field of magnesium alloy preparation process equipment, in particular to a magnesium alloy melting and holding furnace with recovery function.

Background technique

At present, the magnesium alloy parts produced by die-casting account for more than 90% of the whole magnesium alloy parts. In order to meet the needs of filling the mold cavity with molten alloy during die-casting, a high scrap rate is often obtained in the die-casting production process of magnesium alloy parts. , usually 40%-60% of the total metal input. Most of the waste produced by die casting is clean high-grade waste. How to recycle this part of waste material plays a key role in the total cost of the product. General die-casting enterprises have 3 options: sell, recycle outside the factory or recycle inside the factory. The former two have placed a great burden on the enterprise, and the external factors are too large, and the on-site recycling cannot be effectively carried out due to the constraints of the site, capital, and technology. The current recycling system on the market still uses recycling to form qualified magnesium ingots. Enterprises use melting and holding furnaces to melt magnesium ingots and then die-cast products.

Contents of the invention

The present invention overcomes the shortcomings in the prior art, combines waste magnesium recovery with melting and casting process, and realizes that the recovered waste magnesium liquid can be directly die-casted into products without being solidified into magnesium ingots; and can make the recovered waste magnesium Magnesium liquid must meet the requirements of standard magnesium liquid, and all index data have reached industry standards.

The present invention is achieved through the following technical solutions:

A magnesium alloy melting and holding furnace with a recovery function, comprising a furnace body 8, a feeding port 1, a stirring pump 2, a feeding pump 3, a feeding pump feeding pipe 4, a crucible 12, a crucible partition 13, an electric box 7 and Pump chamber heating device 10;

A crucible is arranged in the furnace body of the melting furnace as a container for molten magnesium;

A crucible partition is arranged in the crucible to divide the crucible into a stirring chamber and a feeding chamber;

A feeding port is set at the upper end of the furnace body as the entrance of the magnesium material;

A feeding pump is arranged on the upper end of the furnace body, and the lower end of the feeding pump is connected with a stirring blade 11, and the stirring blade extends into the stirring chamber of the crucible;

A feeding pump and a feeding pump material tube are arranged on the upper end of the furnace body, and the lower end of the feeding pump extends into the feeding chamber of the crucible;

An electric box is provided on the outside of the furnace body for heat preservation and heating;

A heating device is respectively arranged at the bottom of the stirring chamber and the material beating chamber to heat the stirring chamber and the material beating chamber respectively.

In the above technical solution, the crucible partition has a double-layer structure, with stainless steel structures on both sides, and a temperature-insulating material inside to isolate the direct temperature transfer between the stirring chamber and the feeding chamber, so that the temperature in the stirring chamber The magnesium material melts faster and saves production time; the temperature of the pump chamber is lowered to precipitate impurity elements, settle into slag, and improve the quality of magnesium liquid.

In the above technical solution, opening structures are provided on both sides of the pump as windows for slag removal, and the opening structures are the first slag removal port 5 and the second slag removal port 6 .

In the above technical solution, guide rails 9 are provided at the bottom of the furnace body.

When using a magnesium alloy melting and holding furnace with recovery function described in the above technical scheme to recycle waste magnesium materials: select suitable clean waste magnesium materials, and determine the proportion of integration according to the cleanliness of waste magnesium materials; Set the temperature of the melting chamber and the pump chamber, add standard magnesium ingots to the melting and holding furnace according to the proportion, wait for the molten magnesium to melt, put in the waste magnesium material, and turn on the stirring function throughout the process; after the internal temperature of the crucible reaches the set temperature, sample the magnesium liquid If the test results do not meet the standards, calculate the amount of alloy added and supplement the alloy; at the same time, according to the test results, the impact of the addition of waste magnesium materials on the standard magnesium solution can be calculated, and the ratio of clean magnesium ingots and waste magnesium can be changed. Adjust the impact of waste magnesium on the magnesium liquid; after the composition of the magnesium liquid meets the requirements, carry out subsequent liquid transfer and die-casting processes.

Compared with prior art, the beneficial effect of the present invention is:

1. This device enables most of the clean waste magnesium materials in the production process of the enterprise to be directly recycled on-site, and the recycling function is integrated into the magnesium alloy insulation melting furnace, which does not affect the occupation of land and does not occupy a lot of money;

2. The existing technology is to melt the waste magnesium to remove impurities and then solidify it into magnesium ingots. The manufacturer melts the magnesium ingots to form magnesium liquid, and then carries out the die-casting of the product. However, in this method, the waste magnesium materials are recycled online and used directly, removing the The two steps of "solidification-remelting" in the middle improve production efficiency, save energy and protect the environment;

3. Because the magnesium liquid is relatively viscous, the function of mechanical stirring is added in the stirring chamber of the melting furnace in this device. During the stirring process, the impurities with large mass and the magnesium liquid separate and sink to the bottom to form bottom slag, which is relatively clear The impurities float up to form scum. The bottom slag and scum can be taken out by regular cleaning and scum removal. Stirring can prevent impurities from being mixed in the viscous magnesium solution and reduce the impact of impurities on the magnesium solution during the recovery process of waste magnesium. , to reduce the impact of waste magnesium recycling on the overall quality of magnesium liquid;

4. In order to achieve the stirring function, a slag blocking plate is installed at the crucible partition to minimize the bottom slag entering the pump chamber due to stirring;

5. In the process of recycling the waste magnesium liquid, if the composition of the magnesium liquid is unqualified, alloy elements can be added to adjust the composition, so as to improve the adaptability of the recovery to the magnesium material;

6. The dual temperature control of the furnace is achieved through the following two points: one is to equip the furnace with heating wires outside the crucible, and to increase the power of the heating wires in the melting chamber, so that the temperature outside the melting room can be heated to a higher level; the second is to set up double compartments in the middle of the crucible plate, to avoid the direct transfer of temperature between the melting chamber and the pump chamber; the double-temperature-controlled structure of the furnace saves production time by increasing the melting speed of the melting chamber; lowering the temperature of the pump chamber enables the precipitation of impurity elements, which settle into slag and elevate the magnesium liquid quality.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic diagram of a side perspective structure of the present invention.

Among them, 1 is the feeding port, 2 is the stirring pump, 3 is the beating pump, 4 is the material pipe of the beating pump, 5 is the first slag removal port, 6 is the second slag removal port, 7 is the electric box, and 8 is the furnace Furnace body, 9 is a guide rail, 10 is a pump chamber heating device, 11 is a stirring blade, 12 is a crucible, and 13 is a crucible partition.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

As shown in the figure, a magnesium alloy melting and holding furnace with recovery function includes a furnace body 8, a feeding port 1, a stirring pump 2, a feeding pump 3, a feeding pump feeding tube 4, a crucible 12, and a crucible partition 13. Electric box 7 and pump chamber heating device 10; a crucible is provided in the furnace body of the melting furnace as a container for melting magnesium liquid; a crucible partition is provided in the crucible to divide the crucible into a stirring chamber and a feeding chamber chamber; the upper end of the furnace body is provided with a feeding port as the entrance of the magnesium material; the upper end of the furnace body is provided with a feeding pump, and the lower end of the feeding pump is connected to the stirring blade 11, and the stirring blade extends into the stirring chamber of the crucible; The upper end of the furnace body is provided with a feeding pump and the feeding pump tube, and the lower end of the feeding pump extends into the feeding chamber of the crucible; an electric box is arranged outside the furnace body for heat preservation and heating ; A pump chamber heating device is provided at the bottom of the material removal chamber, a first slag removal port 5 and a second slag removal port 6 are respectively arranged on both sides of the material removal pump, and guide rails are provided at the bottom of the furnace body of the melting furnace 9 makes it more convenient to move the whole melting and holding furnace device.

When recycling waste magnesium:

Step 1. Select suitable clean waste magnesium material, and determine the proportion of blending according to the cleanliness of the waste magnesium material;

Step 2. Set the temperature of the melting chamber and the pump chamber respectively, add standard magnesium ingots to the melting and holding furnace according to the proportion, wait for the magnesium liquid to melt, put in the waste magnesium material, and start the stirring function throughout the process;

Step 3: After the internal temperature of the crucible reaches the set temperature, the magnesium liquid is sampled and tested; if the test result does not meet the standard, the alloy addition amount is calculated and the alloy is supplemented; at the same time, the waste magnesium material can be calculated according to the test results to add to the standard magnesium liquid By changing the ratio of clean magnesium ingots and waste magnesium to adjust the influence of waste magnesium on magnesium liquid;

Step 4: After the composition of the magnesium liquid meets the requirements, the subsequent liquid transfer and die-casting processes are carried out.

The present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (4)

1. A magnesium alloy melting and holding furnace with recovery function is characterized in that: it comprises a furnace body, a feeding port, a stirring pump, a feeding pump, a feeding pump feed pipe, a crucible, a crucible partition, an electric box and a pump chamber heating equipment; A crucible is arranged in the furnace body of the melting furnace as a container for molten magnesium; A crucible partition is arranged in the crucible to divide the crucible into a stirring chamber and a feeding chamber; A feeding port is set at the upper end of the furnace body as the entrance of the magnesium material; A feeding pump is arranged at the upper end of the furnace body of the melting furnace, and the lower end of the feeding pump is connected with stirring blades, and the stirring blades extend into the stirring chamber of the crucible; A feeding pump and a feeding pump material tube are arranged on the upper end of the furnace body, and the lower end of the feeding pump extends into the feeding chamber of the crucible; An electric box is provided on the outside of the furnace body for heat preservation and heating; A heating device is respectively arranged at the bottom of the stirring chamber and the material beating chamber to heat the stirring chamber and the material beating chamber respectively. 2. A magnesium alloy melting and holding furnace with recovery function according to claim 1, characterized in that: the crucible partition is a double-layer structure, the two sides are stainless steel structures, and the inside is a heat insulating material. 3. A magnesium alloy melting and holding furnace with recovery function according to claim 1, characterized in that opening structures are respectively provided on both sides of the pump as windows for slag removal. 4. A magnesium alloy melting and holding furnace with recycling function according to claim 1, characterized in that: guide rails are arranged at the bottom of the melting furnace body.