CN102864314B - The method and apparatus of a kind of continuous segregation purification refined aluminium and rafifinal - Google Patents
The method and apparatus of a kind of continuous segregation purification refined aluminium and rafifinal Download PDFInfo
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- CN102864314B CN102864314B CN201210401987.9A CN201210401987A CN102864314B CN 102864314 B CN102864314 B CN 102864314B CN 201210401987 A CN201210401987 A CN 201210401987A CN 102864314 B CN102864314 B CN 102864314B
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Abstract
The present invention relates to the method and apparatus of a kind of serialization segregation purification refined aluminium and rafifinal, belong to casting field of metallurgy.Principal character of the present invention is that the crystallization of refined aluminium and rafifinal completes in the molten aluminum of flowing, rely on the liquid-supplying system needing the production line such as continuous casting, continuous casting and rolling of continuous liquid supply, molten aluminum is provided by the aluminium liquid flowed out in standing furnace, the aluminium liquid of flowing provides purification raw material endlessly, coordinates roller crystal pulling apparatus really to achieve continuous prodution rafifinal.The whole purification process of the method is without the need to stirring system, greatly reduce the energy expenditure of insulating process, aluminium liquid after purification on subsequent production activity without impact, the flowing of molten aluminum liquid ensure that the stability of purification material composition, the homogeneity of product composition is well ensure that when processing condition are certain, the method also reduces energy consumption while greatly improving production efficiency, and directional freeze purifying technique is not by the impact of atmosphere in purification furnace.
Description
Technical field
It is the method and apparatus of a kind of continuous segregation purification refined aluminium and rafifinal that the present invention relates to, and the segregation method of purification that particularly a kind of energy consumption is low, yield rate is high, production efficiency is high, belongs to casting field of metallurgy.
Background technology
Utilizing segregation method to purify to metal especially aluminium, is a kind of ripe industrial chemical process.Find by literature search, multiple segregation method is had to prepare the patent of invention of rafifinal, wherein Chinese Patent Application No. is 02111339.4, disclose denomination of invention for " the vacuum continuum sublimate method of rafifinal ", this application people proposes a kind of method entering aluminium liquid, interval absorption impurity element enriched layer liquid continuously.The method take liquid aluminium as raw material, and by strictly controlling the temperature of heating zone and cooling zone, control to draw the amount of aluminium liquid and the size of the timed interval and control vacuum tightness, after purifying, the purity of crystal can reach 5N5.
Although this invention technique is advanced, level of automation is high, and system is too complicated, not easily manipulation and the method is not real continuous production method, fluid infusion process not only affects the serialization of production, also destroys the stable environment condition of purification, is unfavorable for the stable of product composition.In addition, there is the enriched layer of impurity element in the method, affects its refining effect of larger element not obvious for purification rate by concentration.
Summary of the invention
The object of the invention is to overcome prior art deficiency, the method that the crystallization of inventing a kind of refined aluminium and rafifinal completes in the molten aluminum of flowing, molten aluminum is provided by the aluminium liquid flowed out in standing furnace, the aluminium liquid of flowing provides purification raw material endlessly, coordinates roller crystal pulling apparatus really to achieve serialization segregation method of purification and the specific equipment of continuous prodution rafifinal or refined aluminium.It can greatly reduce the energy consumption of production process and enhance productivity on the basis of continuous prodution rafifinal.
The method object step of the present invention's continuous segregation purification refined aluminium and rafifinal is as follows:
1. metal melting aluminium or electrolytic aluminium liquid are directly inserted in standing furnace (15), by transfer lime and flow control plug (14), allow the molten metal aluminium liquid flowed out from standing furnace (15) directly enter under the liquid level of crucible (1) interior holding molten metal aluminium liquid, subsurface metal aluminium liquid outlet is for one or more;
2. place in purification furnace (10) and crucible (1) is installed, thermopair (11) is preset with in crucible (1), to record metal aluminium liquid temperature in crucible (1) in real time, control metal aluminium liquid rate of discharge, allow the liquid level of the middle molten metal aluminium liquid of crucible (1) keep constant;
3. molten metal aluminium liquid is provided with one or more crystallizer (17) from crucible (1) sidepiece or bottom, molten metal aluminium liquid is cooled at crystallizer (17) position, complete directional freeze crystallization, molten metal aluminium liquid generation continuous offset precipitation and crystallization in process of cooling, obtain bar-shaped crystalline aluminophosphate body, i.e. rafifinal or refined aluminium;
4. along with the continuous growth of aluminium crystal, aluminium crystal (18) termination, one end of crystallization is clamped or blocks by a seeding head (22), aluminium crystal (18) after purification is introduced by several roller crystal pulling apparatus formed friction guidance wheel (19) by the seeding bar (21) connected with seeding head (22) one end, the aluminium crystal (18) after purifying is guided to move forward with the pulling rate of 2-200mm/h, after reaching preseting length, the aluminium crystal after purification cuts off by cutting machine (20) automatically, completes serialization segregation purification and produces rafifinal process.
In described crucible (1), aluminium liquid holding temperature is 660 DEG C-710 DEG C; The proal speed of aluminium crystal is 10-100mm/h; In described standing furnace (15), temperature of aluminum liquid is 670 DEG C-750 DEG C.
Described roller crystal pulling apparatus takes turns (19) by two pairs or more friction guidance, and lift process is taken turns (19) by seeding head (22), seeding bar (21) and friction guidance and jointly completed, and without stroke restriction, completes continuous prodution.
The equipment producing continuous segregation purification refined aluminium and rafifinal is, purification furnace (10) is sealing shape casing, the vision slit (2) that purification furnace (10) top is opened, purification furnace (10) surrounding furnace wall is hollow shape, purification furnace (10) bottom has cooling water inlet (8), purification furnace (10) top has cooling water outlet (3), and purification furnace (10) is equipped with thermal insulation layer (4) with the bottom contacted with each other both crucible (1).
Described crucible (1) outer wall circumference is enclosed with the coil (5) of hollow tubular, the coil (5) of hollow tubular to be connected with power supply by controller and with cold water pipe UNICOM, when high-frequency current connected by the coil (5) of hollow tubular, there is electrical induction heating, as the use of crucible (1) insulation in the coil (5) of hollow tubular; When coil (5) inside of hollow tubular passes into cold water, coil (5) entirety of hollow tubular turns cold, and plays the use reducing crucible (1) temperature.
Connected by feeding pipe between crucible (1) in described purification furnace and standing furnace (15), the feeding pipe of drawing from standing furnace (15) is at least one, feeding pipe (7) is equipped with flow control plug (6,14) and baffle plate (13).
Pass into water coolant or cooling gas in described crystallizer (17) outer wall open tube, allow in crystallizer (17) and form specified temp field.
Why the present invention can obtain obtains refined aluminium and rafifinal continuously by segregation method, one of reason is: mainly through ensureing the metal aluminium liquid total amount in crucible (1), allow the molten metal aluminium liquid flowed into from standing furnace (15), make the impurity that crucible (1) segregation crystallization is discharged, can be diffused into rapidly in the molten metal aluminium liquid in crucible (1), crucible (1) interior aluminium liquid composition can not change, ensure the relative stability of aluminium liquid composition in crucible, avoid the existence of segregation method accumulation of impurities layer, substantially increase purification rate.Simultaneously, directly flowing into metallic aluminium subsurface molten metal aluminium liquid from crucible (1) also plays good stirring action to crucible (1) metal aluminium liquid, allow the impurity of discharging in segregation purification process can be taken away or take away segregation crystal region in time, ensure the uniform and stable of segregation crystallization and purification regional metal aluminium component, whole segregation crystallization and purification process is without the need to being equipped with stirring system, greatly reduce the energy expenditure of crucible (1) insulating process, the aluminium liquid after purification on follow-up activity in production without impact.
Two of reason is: crucible (1) can be placed in the purification furnace shell (10) of an opposing seal by the present invention, keeps the versus environmental atmosphere in purification furnace (9) constant, thus makes the segregation Purification of Aluminum quality of drawing unaffected.Hollow tubular copper coil (5) is enclosed with at crucible (1) surrounding outer wall, not only hollow tubular copper coil (5) does prolong but also make insulation coil, required molten metal aluminium liquid in crucible (1) is allowed in whole purification process to remain in certain temperature range, to ensure the mobility of molten metal aluminium liquid self, molten metal aluminium liquid is provided to be the raw material that segregation crystallization and purification is stable endlessly, coordinate roller pulling apparatus really to achieve continuous prodution rafifinal, and greatly improve production efficiency.
The present invention is along with the continuous growth of aluminium crystal, the termination, aluminium crystal one end of crystallization is clamped/blocks by a seeding head (22), aluminium crystal is incorporated into the roller crystal pulling apparatus be made up of friction guidance wheel (19), the production of rafifinal achieves real serialization, economize back-end crop operation after conventional segregation Purification of Aluminum, improve yield rate.
The process that the present invention produces rafifinal or refined aluminium due to production rate relative to conventional aluminium production slowly, therefore it is negligible on the impact of subsequent production.
The whole purification process of the inventive method required insulation energy is little, and without the need to stirring system, aluminium liquid after purification on subsequent production activity without impact, the flowing of molten aluminum liquid ensure that the stability of purification material composition, the homogeneity of product composition is well ensure that when processing condition are certain, the method also improves yield rate while greatly improving production efficiency, and drop-down or layback directional freeze purifying technique is by the impact of atmosphere in purification furnace.
Production technique of the present invention saves the electromagnetic mixing apparatus of bulky complex, saves a large amount of electric energy simultaneously, and be real serialization purification process, whole purification process energy consumption is low, and product composition is stablized, and yield rate is high.
Accompanying drawing explanation
Fig. 1 the present invention respectively part connect totally connect relation overlook direction schematic diagram.
The structural representation (being solidified as example with oriented sideways) of Fig. 2 continuous prodution rafifinal of the present invention.
Fig. 3 is Fig. 2 crystallising part A-A directional profile figure.
In figure: 1 crucible, 2 vision slits, 3 cooling water outlets, 4 thermal insulation layers, 5 coils, 6 flow control plugs, 7 continuous casting and rollings or need aluminium liquid system without interruption, 8 funnels, 9 cooling water inlets, 10 purification furnace furnace shells, 11 thermopairs, 12 screen plates, 13 baffle plates, 14 flow control plugs, 15 standing furnaces, 16 aluminium liquid circulation main channels, 17 crystallizers, 18 purify after aluminium crystal, 19 friction guidance wheels, 20 cutting on line machines, 21 seeding bars, 22 seeding heads.
Embodiment:
The method that refined aluminium of the present invention and the continuous segregation of rafifinal are purified, electrolytic aluminium liquid or the metal aluminium liquid after dissolving is it is characterized in that to insert in standing furnace 15, the molten metal aluminium liquid flowed out from standing furnace 15 flows in the crucible 1 in purification furnace after being arranged on the screen plate 12 in feeding pipe, preset the thermopair 11 in the crucible 1 be arranged in purification furnace, record metal aluminium liquid temperature in the crucible 1 in purification furnace in real time, to determine the holding temperature of metal aluminium liquid, the processing parameter such as cooling power and pulling rate, control aluminium liquid rate of discharge, the liquid level of molten metal aluminium liquid in the crucible 1 in purification furnace is allowed to keep constant, molten metal aluminium liquid completes directional solidification method at the crystallizer 17 of crucible 1 sidepiece or bottom and is cooled, the molten metal aluminium liquid generation continuous offset precipitation and crystallization of process of cooling, obtain bar-shaped crystalline aluminophosphate body (i.e. rafifinal or refined aluminium), along with the continuous growth of aluminium crystal, the termination, aluminium crystal one end of crystallization is clamped/blocks by a seeding head 22, aluminium crystal is incorporated into the roller crystal pulling apparatus that friction guidance wheel 19 is formed, traction aluminium crystal travels forward with the pulling rate of 2-200mm/h, after reaching preseting length, aluminium crystal cuts off or blanking by cutting machine 20 automatically, complete serialization segregation purification and produce rafifinal process,
The continuous segregation purifying crystal process of described refined aluminium and rafifinal completes in the metal aluminium liquid of the flowing of constantly supply, and flowing aluminium liquid provides continuous segregation purification raw material endlessly; Described crystal pulling mode can adopt drop-down according to place situation or survey the crystal pulling mode of drawing; Described crystal pulling mode adopts the mode of a position or two and the crystal pulling simultaneously of two or more position according to place situation.
Described crystallizer can partly pass into water coolant or cooling gas, allows aluminium in crystallizer carry out crystallization, and keeps specific thermograde to make aluminium crystallization near Tc point; In described purification furnace crucible 1, aluminium liquid holding temperature is 660 DEG C-710 DEG C; Described pulling rate is 10-100mm/h; In described standing furnace 15, temperature of aluminum liquid is 670 DEG C-750 DEG C.
Below concrete operation step of the present invention:
(1) seeding bar 21 and seeding head (22) playback are to treating crystal pulling position.
(2) open baffle plate 13 makes filtered aluminium liquid flow in crucible 1 under the effect of filtering baffle 12, and adjust flux controls the flow that plug 14 aluminium liquid flows out crucible, makes the aluminium liquid in crucible keep fixed amount.
(3) size of flow in crucible is regulated by the size of flow control plug 14, to strengthen or to weaken mixing effect.
(4) temperature measuring aluminum solutions by thermopair 11 determines to enable cooling or the heating function of coil (5), finally makes temperature of aluminum liquid remain in suitable temperature range.
(5) control well after temperature of aluminum liquid, crystallizer part passes into water coolant or cooling gas, makes aluminium in crystallizer carry out crystallization, and keeps specific thermograde to make aluminium crystallization near Tc point, makes friction guidance take turns 19 with the uniform crystal pulling of a certain speed simultaneously.
(6) online blanking is carried out by cutting on line machine 20 after high-purity aluminium ingot is pulled to certain length.
Embodiment 1: be melting 99.85Al in standing furnace, the temperature of aluminum liquid that standing furnace flows out is 700 DEG C, control temperature of aluminum liquid in crucible, aluminium liquid is made to control within the scope of 710 DEG C in the temperature at crystallizer place, the speed of cooling of crystallization control device, guarantees that aluminium liquid freezing interface is in crystallizer inlet, after with the speed of 200mm/h draw crystal, after aluminium crystal growth to certain length, blanking detects, and the purity of aluminium can reach 99.95Al.
Embodiment 2: be melting 99.85Al in standing furnace, the temperature of aluminum liquid that standing furnace flows out is 695 DEG C, control temperature of aluminum liquid in crucible, aluminium liquid is made to control within the scope of 678 DEG C in the temperature at crystallizer place, the speed of cooling of crystallization control device, guarantees that aluminium liquid freezing interface is in crystallizer inlet, after with the speed of 100mm/h draw crystal, after aluminium crystal growth to certain length, blanking detects, and the purity of aluminium can reach 99.98Al.
Embodiment 3: be melting 99.85Al in standing furnace, the temperature of aluminum liquid that standing furnace flows out is 695 DEG C, control temperature of aluminum liquid in crucible, aluminium liquid is made to control within the scope of 670 DEG C in the temperature at crystallizer place, the speed of cooling of crystallization control device, guarantees that aluminium liquid freezing interface is in crystallizer inlet, after with the speed of 10mm/h draw crystal, after aluminium crystal growth to certain length, blanking detects, and the purity of aluminium can reach 99.995Al.
Embodiment 4: be melting 99.98Al in standing furnace, the temperature of aluminum liquid that standing furnace flows out is 695 DEG C, control temperature of aluminum liquid in crucible, aluminium liquid is made to control within the scope of 660 DEG C in the temperature at crystallizer place, the speed of cooling of crystallization control device, guarantees that aluminium liquid freezing interface is in crystallizer inlet, after with the speed of 2mm/h draw crystal, after aluminium crystal growth to certain length, blanking detects, and the purity of aluminium can reach 99.9995Al.
Claims (4)
1. continuous segregation obtains a method for purification refined aluminium and rafifinal, it is characterized in that comprising the following steps:
1. metal melting aluminium or electrolytic aluminium liquid are directly inserted in standing furnace (15), by transfer lime and flow control plug (14), allow the molten metal aluminium liquid flowed out from standing furnace (15) directly enter under the liquid level of crucible (1) interior holding molten metal aluminium liquid, subsurface metal aluminium liquid outlet is for one or more;
2. place in purification furnace (10) and crucible (1) is installed, thermopair (11) is preset with in crucible (1), to record metal aluminium liquid temperature in crucible (1) in real time, control metal aluminium liquid rate of discharge, allow the liquid level of the middle molten metal aluminium liquid of crucible (1) keep constant;
3. molten metal aluminium liquid is provided with one or more crystallizer (17) from crucible (1) sidepiece or bottom, molten metal aluminium liquid is cooled at crystallizer (17) position, complete directional freeze crystallization, molten metal aluminium liquid generation continuous offset precipitation and crystallization in process of cooling, obtain bar-shaped crystalline aluminophosphate body, i.e. rafifinal or refined aluminium;
4. along with the continuous growth of aluminium crystal, aluminium crystal (18) termination, one end of crystallization is clamped or blocks by a seeding head (22), aluminium crystal (18) after purification is introduced by several roller crystal pulling apparatus formed friction guidance wheel (19) by the seeding bar (21) connected with seeding head (22) one end, the aluminium crystal (18) after purifying is guided to move forward with the pulling rate of 2-200mm/h, after reaching preseting length, the aluminium crystal after purification cuts off by cutting machine (20) automatically, completes serialization segregation purification and produces rafifinal process;
In described crucible (1), aluminium liquid holding temperature is 660 DEG C-710 DEG C; In described standing furnace (15), temperature of aluminum liquid is 670 DEG C-750 DEG C;
Described roller crystal pulling apparatus takes turns (19) by two pairs or more friction guidance, and lift process is taken turns (19) by seeding head (22), seeding bar (21) and friction guidance and jointly completed, and without stroke restriction, completes continuous prodution.
2. continuous segregation according to claim 1 obtains the method for purification refined aluminium and rafifinal, it is characterized in that the described proal speed of aluminium crystal is 10-100mm/h.
3. one kind obtains the equipment of purification refined aluminium and rafifinal by continuous segregation, it is characterized in that purification furnace (10) is for sealing shape casing, the vision slit (2) that purification furnace (10) top is opened, purification furnace (10) surrounding furnace wall is hollow shape, purification furnace (10) bottom has cooling water inlet (8), purification furnace (10) top has cooling water outlet (3), and purification furnace (10) is equipped with thermal insulation layer (4) with the bottom contacted with each other both crucible (1);
Pass into water coolant or cooling gas in crystallizer (17) outer wall open tube, allow in crystallizer (17) and form specified temp field;
Connected by feeding pipe between crucible (1) in purification furnace and standing furnace (15), the feeding pipe of drawing from standing furnace (15) is at least one, feeding pipe (7) is equipped with flow control plug (6,14) and baffle plate (13).
4. the equipment being obtained purification refined aluminium and rafifinal by continuous segregation according to claim 2, it is characterized in that crucible (1) outer wall circumference is enclosed with the coil (5) of hollow tubular, the coil (5) of hollow tubular to be connected with power supply by controller and with cold water pipe UNICOM, when high-frequency current connected by the coil (5) of hollow tubular, there is electrical induction heating, as the use of crucible (1) insulation in the coil (5) of hollow tubular; When coil (5) inside of hollow tubular passes into cold water, coil (5) entirety of hollow tubular turns cold, and plays the use reducing crucible (1) temperature.
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| CN111378850A (en) * | 2020-05-08 | 2020-07-07 | 河南中孚实业股份有限公司 | Method for purifying high-purity aluminum by segregation |
| CN112795792A (en) * | 2020-12-07 | 2021-05-14 | 南通泰德电子材料科技有限公司 | Production process for producing 6N5 ultra-high purity aluminum |
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Address after: 650031 No. 86 Yuantong North Road, Yunnan, Kunming Patentee after: Kunming Metallurgical Research Institute Co., Ltd Address before: 650031 No. 86 Yuantong North Road, Yunnan, Kunming Patentee before: Kunming Metallurgical Research Institute |