Directional solidification short process purification equipment and purification method of high-purity aluminum

A technology of directional solidification and short process, applied in the direction of improving process efficiency, etc., can solve the problems of extended production cycle, low heating and cooling efficiency, low purification efficiency, etc., achieve high purification efficiency and purification quality, accelerate melting speed, process The effect of configuration optimization

Active Publication Date: 2015-04-29
HENAN ZHONGFU IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this invention has some disadvantages in the process of use: 1. Since all operations are completed in a single furnace body, its heating and cooling efficiency is relatively low, and the production cycle is prolonged, resulting in low production capacity; 2. Since the growth mode of the purified crystal is from the bottom up Accumulation is not conducive to the accumulation of impurity elements at the end, resulting in low purification efficiency; 3. In order to meet the purity requirements of the purified crystal ingot, 15% to 70% of the thickness needs to be removed from the tail, resulting in low yield

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  • Directional solidification short process purification equipment and purification method of high-purity aluminum

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Embodiment 1

[0027] Embodiment 1: see figure 1, a high-purity aluminum directional solidification short-process purification equipment, including a purification device 1 and a heating device 2, the purification device 1 and the heating device 2 are independent, and are jointly arranged inside a large smelting furnace shell 20, and the purification device 1 is from outside to inside It includes a cooling device 10, a heat-conducting layer 7 for purification, a heat-retaining crucible for purification 6 and a stirring device 4 in sequence. A purifying furnace cover 3 is provided directly above the purifying and heat-retaining crucible 6. A vacuuming device 11 and a measuring chamber are respectively provided on both sides of the purifying furnace cover 3. The temperature device 12 is symmetrically provided with a first heating mechanism 9 below the purification furnace cover 3, and the stirring device 4 is located at the axis of the purification furnace cover 3 and can rotate horizontally. T...

Embodiment 2

[0029] Embodiment 2: the purification method of purifying by adopting the high-purity aluminum directional solidification short flow purification equipment described in embodiment 1, its specific steps are as follows:

[0030] ① Pour the refined molten aluminum into the purification and heat preservation crucible 6 in the purification device 1, close the purification furnace cover 3, open the stirring device 4 to stir the melt, and start the vacuuming device 11 to make the purification and heat preservation crucible 6 form vacuum;

[0031] ② When the original molten aluminum melt starts to solidify, power on the first heating mechanism 9, and slowly increase the power, control the melt temperature between 660°C and 680°C through the temperature measuring device 12, and use the cooling device 10 to purify the heat conducting layer 7 Carry out forced cooling, control the temperature gradient of the solid-liquid interface of the melt in the purification insulation crucible 6 to b...

Embodiment 3

[0038] Example 3: Select 2000Kg of refined primary aluminum liquid with a purity of at least 99.85% and a temperature of 700°C, and introduce it into the purification insulation crucible of the purification device, seal the purification device, start the vacuum device, and make the vacuum degree reach 10 -3 , turn on the stirring device to rotate the melt, and keep the number of revolutions at 15-50 rpm; start the heating device, and keep the power at 10-50kw to ensure that the melt temperature is cooled at a constant rate of 1°C / min, so that the melt temperature is kept at 660°C, the cooling device starts to automatically adjust the cooling, maintain the side crystallization speed of 5cm / h, and the crystallization ends after 3 hours; take out the purification insulation crucible, pour out the remaining aluminum liquid in it, and then put the purification insulation crucible together with the purified aluminum solid Put it into the heating device and seal it tightly, and evacua...

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Abstract

The invention discloses directional solidification short process purification equipment and purification method of high-purity aluminum. The purification equipment comprises a purification device and a heating device, which are respectively independent, wherein the purification device comprises a cooling device, a purification heat conduction layer, a purification heat preservation crucible, a stirring device, a purification furnace cover, a vacuumizing device, a first heating mechanism and a temperature measurement device; the heating device comprises a heat insulating layer, a heating heat conduction layer, a heating crucible, a heating furnace cover, a second vacuumizing device, a second heating mechanism and a second temperature measurement device, a rotating platform is arranged at the bottom of the heating crucible, and a rotating mechanism and a transmission mechanism are arranged below the rotating platform. The purification method in which a purification process and a heating process are separately operated is adopted in the invention, so that a solid-liquid interface can be accurately controlled in the purification process to keep a stable temperature gradient and higher purification efficiency and purification quality are kept; afterheat of purified solid aluminum is utilized in the heating process, so that the heating efficiency is more than twice higher than that of conventional heating. The purification equipment disclosed by the invention has the advantages of low energy consumption, large handling capacity, high purification efficiency and high product purity.

Description

Technical field: [0001] The invention relates to a high-purity aluminum directional solidification short-process purification equipment, in particular to a purification method for high-purity aluminum purification using the high-purity aluminum directional solidification short-process purification equipment, which belongs to the technical field of aluminum metallurgy purification. Background technique: [0002] Purification and purification of aluminum by segregation method is an industrially applied process method. At present, segregation method purification technology mainly includes distribution crystallization method, zone smelting method and directional solidification method. The directional solidification method can be divided into cooling tube solidification method, bottom cooling method, side wall cooling method, upper lifting solidification method, lateral solidification method, etc. The directional solidification method has the advantages of low energy consumption, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/06C22B9/02
CPCY02P10/20
Inventor 戴飞
Owner HENAN ZHONGFU IND
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