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Device and method for recovery, separation and purification of aluminum-tin alloy through vacuum continuous crystallization

A technology for crystallization separation and recycling of aluminum, applied in the direction of improving process efficiency, can solve the problems of easy oxidation of aluminum, inability to handle aluminum-tin alloy, insufficient temperature range of crystallizer, etc., and achieves low cost, high universality of raw materials, and easy operation handy effect

Pending Publication Date: 2020-05-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] A utility model with the publication number CN 203447811 U discloses a high-efficiency electrothermal continuous crystallizer, which improves the current electrothermal continuous crystallizer equipment in tin smelters, but the temperature range of the crystallizer is not enough, and the body design makes the metal in the tank exposed to the In the air, aluminum is easily oxidized, so this equipment cannot handle aluminum-tin alloys

Method used

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  • Device and method for recovery, separation and purification of aluminum-tin alloy through vacuum continuous crystallization
  • Device and method for recovery, separation and purification of aluminum-tin alloy through vacuum continuous crystallization
  • Device and method for recovery, separation and purification of aluminum-tin alloy through vacuum continuous crystallization

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Embodiment 1

[0036] A device for vacuum continuous crystallization, separation, purification, and recovery of aluminum-tin alloys, including a casing, a vacuum pump, a U-shaped crystallization tank, a melting pot, a melting pot, and a crystal pot. The vacuum pump communicates with the inner cavity of the casing. The vacuum pump is used to evacuate to realize the vacuum environment of the inner cavity. The U-shaped crystallization tank, melting material pot, melt pot, and crystal pot are all set in the inner cavity of the shell. The U-shaped crystallization tank is arranged obliquely. The high end is the tank head and the low end is the tank tail. The inclination angle of the U-shaped crystallization tank It is 2°-7°, the crystal pot is connected with the groove head, and the melt pot is connected with the groove tail. There are several heating elements at the bottom of the U-shaped crystallization tank. The temperature at the head of the tank is higher than that at the end of the tank. The...

Embodiment 2

[0040] This embodiment is the application of the above-mentioned embodiment 1, a method for vacuum continuous crystallization, separation, purification and recovery of aluminum-tin alloys, including:

[0041] Step 1. Turn on the vacuum pump and the circulating water machine. First, 500 g of aluminum-tin alloy (wherein the mass fraction of tin is 20%) is heated to 650° C. under vacuum conditions (vacuum degree is 500 Pa) and fully melted.

[0042] Step 2. The completely melted aluminum-tin alloy melt flows into the U-shaped crystallization tank through the chute. The temperature range is 228°C-660°C. The U-shaped crystallization tank has an inclination angle of 3°, and continuous crystallization and separation are carried out under the drive of the screw ( The rotation speed of the screw is 20r / min), and the molten metal flowing into the U-shaped crystallization tank flows to the low-temperature area for crystallization due to gravity, and the crystal is transported by the screw...

Embodiment 3

[0045] This embodiment is the application of the above-mentioned embodiment 1, a method for vacuum continuous crystallization, separation, purification and recovery of aluminum-tin alloys, including:

[0046] Step 1. Turn on the vacuum pump and circulating water machine. First, 500 g of aluminum-tin alloy (wherein the mass fraction of tin is 30%) is heated up to 630° C. under vacuum condition (vacuum degree is 500 Pa) and fully melted.

[0047] Step 2. The completely melted aluminum-tin alloy melt flows into the U-shaped crystallization tank through the chute. The temperature range is 228°C-660°C. The U-shaped crystallization tank has an inclination angle of 3°, and continuous crystallization and separation are carried out under the drive of the screw ( The rotation speed of the screw is 10r / min), and the metal melt flowing into the U-shaped crystallization tank flows to the low-temperature area for crystallization due to gravity, and the crystal is transported by the screw to...

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Abstract

The invention discloses a device and method for recovery, separation and purification of an aluminum-tin alloy through vacuum continuous crystallization. The device comprises a shell, a vacuum pump, aU-shaped crystallization tank, a melting pot, a melt pot and a crystal pot. The shell is of a vacuum sealed structure, the U-shaped crystallization tank, the melting pot, the melt pot and the crystalpot are all arranged in an inner cavity of the shell, the U-shaped crystallization tank is arranged in an inclined mode, a tank head is arranged at the higher end of the U-shaped crystallization tank, a tank tail is arranged at the lower end of the U-shaped crystallization tank, the crystal pot is connected with the tank head, the melt pot is connected with the tank tail, a plurality of heating elements are arranged at the bottom of the U-shaped crystallization tank, the temperature of the tank head is higher than that of the tank tail, and a screwing device is arranged in the U-shaped crystallization tank and driven by a motor. According to the device and method for recovery, separation and purification of the aluminum-tin alloy through vacuum continuous crystallization, effective separation and purification of aluminum and tin in aluminum tin is achieved through continuous crystallization under vacuum conditions, and crude aluminum and crude tin are finally obtained, the process issimple, the operation is convenient, the raw material has high universality, the cost is low, the device is simple, the process is safe and controllable, and the aluminum-tin alloy with a wide range of quality change can be treated.

Description

technical field [0001] The invention belongs to the technical field of pyrometallurgy of nonferrous metals, and in particular relates to equipment and a method for vacuum continuous crystallization, separation, purification, and recovery of aluminum-tin alloys. Background technique [0002] In daily life, various engine shafting materials usually use aluminum-tin alloys to meet their performance requirements. Aluminum-tin alloys are casting alloys with aluminum as the matrix element and tin as the alloying element. The main purpose is to cast shafting materials. With the increase in the number of scrapped engines and the decline in the output of tin concentrates year after year, the recycling of tin-aluminum alloy materials is in line with the concept of green circular development and has huge economic benefits. [0003] At present, my country's recycling of scrapped engines is in the initial stage, and only a small part of the treatment of shafting parts can be remanufactur...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00C22B25/06C22B25/02
CPCC22B7/004C22B21/0069C22B25/06C22B25/02Y02P10/20
Inventor 李一夫马进萍杨斌徐宝强蒋文龙田阳徐俊杰张环王双平
Owner KUNMING UNIV OF SCI & TECH
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