CN102912156A - System and method for recycling magnesium and magnesium alloy waste - Google Patents
System and method for recycling magnesium and magnesium alloy waste Download PDFInfo
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- CN102912156A CN102912156A CN2012104590742A CN201210459074A CN102912156A CN 102912156 A CN102912156 A CN 102912156A CN 2012104590742 A CN2012104590742 A CN 2012104590742A CN 201210459074 A CN201210459074 A CN 201210459074A CN 102912156 A CN102912156 A CN 102912156A
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Abstract
The invention discloses a system and method for recycling magnesium and magnesium alloy waste. The system comprises at least one melting furnace, wherein an air intake device is communicated to the bottom of a first crucible, inert gas is blown in from the bottom of a melt, and bubbles carry impurities in the melt to a liquid level; when a melting furnace inputs the melt into a thermal insulation casting furnace, and a first liquid outlet pipe is communicated to the part, close to the bottom, of the first crucible so as to ensure that the melt can not carry over the impurities; and a small amount of impurities are still contained in the melt after the impurities are removed, and the impurities are settled at a position, close to a feeding hole, inside the thermal insulation casting furnace, so as to ensure that the impurities settled at the bottom of a second crucible can not be carried over when the melt is transferred toward an ingot casting device, so that the impurity removing effect and efficiency are guaranteed. When the thermal insulation casting furnace transfers the melt toward the ingot casting device, at least one melting furnace completes impurity removing treatment, the melt is transferred toward the thermal insulation casting furnace, feeding to the ingot casting device is guaranteed, a continuous recycling process is realized, and the production efficiency is improved.
Description
Technical field
The present invention relates to recovery system and the method for a kind of magnesium and magnesium alloy waste material.
Background technology
Magnesium and Magnesium Alloys Components by Die Casting accounts for more than 90% of whole Magnesium Alloys Components at present, and in the Die Casting process, the melt filling die cavity causes producing a large amount of magnesium and magnesium alloy waste material, and scrap rate can reach 40 ~ 60% of total metal input amount.Yet the waste material overwhelming majority that above-mentioned press casting procedure produces all is the high-level waste of cleaning, and the control that this part waste material is reclaimed for the total cost of product has extremely crucial effect.
General Die Casting Enterprise has the processing mode of waste material: sell, reclaim outside the factory or factory in reclaim.Front two kinds of situations cause very large burden to enterprise, and the factor of external influence is excessive.
The removal process of waste material is normally with discontinuous or the thawing of semicontinuous smelting furnace, to prevent that with the flux covering or with suitable shielding gas bath surface and air from reacting again; After the fusing, the oxide compound that forms when Die Casting just can adopt corresponding method of refining to remove; And then utilize through the melt of removal of impurities and cast.The method of refining of waste material has two kinds: flux method is arranged and without flux method.
It mainly is for impure content many magnesium and alloyed scrap thereof that flux method is arranged.In melt, add flux, impurity element and oxide compound in flux and the waste material are reacted, form slag, thereby reach the purpose that purifies waste material.The shortcoming of this technology is: flux mostly is muriate, causes easily in the product content of Cl element higher; And can produce the corrosive gasess such as HCL during melting, serious to equipment corrosion; Impurity element in flux and the waste material and the reaction product of oxide compound remain in the alloy easily, destroy mechanical property and the corrosion resistance of product, need to leave standstill for a long time could reduce this kind and be mingled with; The proportion of flux needs well to adjust; Whole removal process is discontinuous or semi-continuous, and production efficiency is not high.
Adopting without flux method to be blown into rare gas element and to take oxide compound in the waste material out of, reach deimpurity purpose, is the prefered method that factory reclaims in the city.With respect to flux method is arranged, simple without the flux method operating process, do not need to add flux, reduce and pollute.But still there are many problems in the method: whole removal process is discontinuous or semi-continuous, production efficiency is not high, existing purification and impurity removal carries out in a smelting furnace, the purification and impurity removal process comprises scrap melting, removal of impurities and impurity sedimentation, the whole long time of purification and impurity removal process need, smelting furnace directly is connected with ingot casting device, the ingot casting device ingot casting also needs certain hour, but the time of the purification and impurity removal process in the smelting furnace time that the ingot casting device ingot casting consumes is wanted much shorter, in this case, the interruption in the production just occurs, affected production efficiency; The impurity sedimentation of purification and impurity removal process is to make to float to be deposited to the bottom of melt to the impurity of melt liquid level again, the mode that this process can adopt melt to leave standstill, in order to improve the interruption situation of production, shorten the time of purification and impurity removal, the mode that melt can be left standstill changes dynamic settling into, after namely removal of impurities is finished, shift in the process of melt to ingot casting device at smelting furnace, be accompanied by the sedimentation of impurity, but be difficult to control with regard to the effect that causes removal of impurities like this, a large amount of impurity is taken in the ingot casting device; Purification and impurity removal is limited in one's ability, the simple rare gas element bubble that leans on is taken the interior inclusion of melt out of, be mingled with the higher waste material of content for some, such as thin-wall part, waste material that oxide content is higher etc., alloy after the recovery is difficult to reach the relevant criterion requirement, has limited the use without flux online recycling production line; In the purification and impurity removal process; melt transfer goes out crucible when carrying out ingot casting, and melt liquid level declines to a great extent in the crucible, and shielding gas can not replenish timely; be very easy to cause the melt burning in the crucible, then can bring production efficiency to cross the consequences such as low but slow down melt liquid level decline.
Summary of the invention
The object of the present invention is to provide a kind of recovery ability strong, continuous, the continual magnesium of production process and magnesium alloy waste material few/without flux online recycling system.
Another object of the present invention is to provide a kind of recovery ability strong, continuous, the continual magnesium of production process and magnesium alloy waste material few/without flux online recycling method.
Technical scheme provided by the invention is:
The recovery system of a kind of magnesium and magnesium alloy waste material comprises:
At least one smelting furnace, the first drain pipe of arbitrary smelting furnace is communicated to the inner position near the bottom of the first crucible of this smelting furnace, arbitrary smelting furnace has the diffuser that passes into rare gas element in the first crucible of this smelting furnace, and this diffuser is communicated to the position of close bottom of the first crucible of this smelting furnace;
The insulation casting furnace, the second crucible bottom of described insulation casting furnace is with respect to the horizontal plane inclined, and the vergence direction of the bottom of described the second crucible is: increase gradually with respect to the side extended height of same level face from laterally closer described second drain pipe of the opening for feed of close described insulation casting furnace the bottom of described the second crucible; And
Ingot casting device;
Wherein, the second drain pipe of described insulation casting furnace is communicated with described ingot casting device selectivity, the first drain pipe of described at least one smelting furnace optionally is communicated with described insulation casting furnace, when the second drain pipe and the described ingot casting device of described insulation casting furnace is in connected state, the first drain pipe of one of them smelting furnace and described insulation casting furnace are in connected state.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, the inside of the second crucible of described insulation casting furnace is provided with n second partition that vertically arranges, wherein, n 〉=2, a described n second partition becomes each other n+1 part of fluid connection with the interior separation of described the second crucible, and a described n second partition staggers each other, wherein has at least a second partition to be arranged at the inner position near the bottom of described the second crucible.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, one of them in described three second partitions is arranged at the inner position near the bottom of described the second crucible, and wherein two are arranged at the inner position near liquid level of described the second crucible.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, the inside of the first crucible of described arbitrary smelting furnace is provided with first dividing plate of vertical setting, and described the first dividing plate becomes each other two portions of fluid connection with the interior separation of the first crucible of this smelting furnace.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, described diffuser includes an inlet pipe and a rotary drive mechanism, described inlet pipe has first part and second section, described first part vertically arranges, and the one end is connected to described rotary drive mechanism, and the other end is communicated with a plurality of second sections, described a plurality of second section radially distributes with respect to the other end of described first part, and an end of described first part also is connected to source of the gas.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, described a plurality of second sections are four, and evenly distribute with respect to described first part.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, the first dividing plate of the inside of the first crucible of described arbitrary smelting furnace is extended to the middle part of this first crucible by the top of this first crucible.
Preferably, in the recovery system of described magnesium and magnesium alloy waste material, described at least one smelting furnace is two.
A kind of method of using described system recoveries magnesium and magnesium alloy waste material is characterized in that, may further comprise the steps:
Step 1, in the first crucible of at least one smelting furnace, respectively magnesium and/or magnesium alloy waste material are fused into melt, and the melt in the first crucible of each smelting furnace is carried out removal of impurities process, the process that removal of impurities is processed is: the rare gas element that continues to pass into certain hour by diffuser to melt, make impurity in the melt at the effect float downward of bubble to liquid level, this diffuser is communicated to the position of close bottom of the first crucible of this smelting furnace
When described insulation casting furnace and described ingot casting device are in connected state, have at least a smelting furnace to finish in described at least one smelting furnace the removal of impurities of its melt is processed;
Step 2, one of them first drain pipe of finishing the smelting furnace that the removal of impurities of its melt is processed is communicated with described insulation casting furnace, the first drain pipe is communicated to the inner position near the bottom of the first crucible of this smelting furnace, its melt of processing through removal of impurities is inputed in the second crucible of described insulation casting furnace, make the contained residual impurity of melt of processing through removal of impurities in the second crucible of insulation casting furnace, sedimentation occur, described the second crucible bottom is inclined with respect to the same level face, and the vergence direction of the bottom of described the second crucible is: increase gradually with respect to the side extended height of same level face from laterally closer described second drain pipe of the opening for feed of close described insulation casting furnace the bottom of described the second crucible;
Step 3, the second drain pipe of described insulation casting furnace is communicated with described ingot casting device, its melt through sedimentation is inputed to described ingot casting device, described ingot casting device will be cast magnesium ingot through the melt of sedimentation.
Preferably, in the described method, in the described step 1, in the process that removal of impurities is processed, in the described step 2, one of them first drain pipe of finishing the smelting furnace that the removal of impurities of its melt is processed is communicated with described insulation casting furnace, the first drain pipe is communicated to the inner position near the bottom of the first crucible of this smelting furnace, when its melt of processing through removal of impurities being inputed in the second crucible of described insulation casting furnace, in this smelting furnace, retain the melt of certain volume.
Preferably, in the described method, in described step 1, the process that removal of impurities is processed also comprises: pass into the aerosol of flux to melt inside, simultaneously melt is stirred, described aerosol is disperseed to form in rare gas element by flux.
The recovery system of magnesium of the present invention and magnesium alloy waste material includes at least one smelting furnace, diffuser is communicated to the bottom of the first crucible, after rare gas element is blown into from the bottom of melt, form a large amount of equally distributed bubbles, bubble is carried into melt liquid level with the impurity in the melt in uphill process, thereby the realization melt separates with impurity, and the impurity of separation is positioned at melt liquid level; When smelting furnace was inputted melt to the insulation casting furnace, the first drain pipe of smelting furnace was communicated to the position of the close bottom of the first crucible, and melt can not brought impurity in the insulation casting furnace again in the guarantee transfer process like this; Melt enters the insulation casting furnace, still contain a small amount of residual impurity in the melt through the removal of impurities processing, sedimentation can occur in these impurity in the insulation casting furnace, and along the slope of the second crucible bottom in the position deposition near opening for feed, described the second drain pipe is communicated to the inner position near the bottom of the second crucible of this insulation casting furnace, when guaranteeing that melt shifts to ingot casting device, the impurity that falls to the second crucible bottom can not brought in the ingot casting device.Said process has improved the dust removal rate of magnesium and magnesium alloy waste material.
When the second drain pipe that is incubated casting furnace is communicated with ingot casting device, when namely shifting melt by the insulation casting furnace to ingot casting device, having at least a smelting furnace to finish processes the removal of impurities of melt, and to insulation casting furnace transfer melt, said process has guaranteed the supply for the melt of ingot casting device, realize carrying out continuously of whole removal process, improved production efficiency.
Description of drawings
Fig. 1 is the structural representation of smelting furnace of the recovery system of magnesium of the present invention and magnesium alloy waste material;
Fig. 2 is the structural representation of insulation casting furnace of the recovery system of magnesium of the present invention and magnesium alloy waste material;
Fig. 3 is the process flow sheet of the recovery method of magnesium of the present invention and magnesium alloy waste material.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing, can implement according to this with reference to the specification sheets literal to make those skilled in the art.
As depicted in figs. 1 and 2, the invention provides the recovery system of a kind of magnesium and magnesium alloy waste material, comprise: at least one smelting furnace 1, the first drain pipe 5 of arbitrary smelting furnace is communicated to the first crucible 3 inner positions near the bottom of this smelting furnace, arbitrary smelting furnace has the diffuser that passes into rare gas element in the first crucible of this smelting furnace, and this diffuser is communicated to the position of close bottom of the first crucible of this smelting furnace; Insulation casting furnace 11, the second crucible bottom of described insulation casting furnace is with respect to the horizontal plane inclined, and the vergence direction of the bottom of described the second crucible is: increase gradually with respect to the side extended height of same level face from laterally closer described second drain pipe 6 of the opening for feed 12 of described insulation casting furnace the bottom of described the second crucible; And ingot casting device; Wherein, the second drain pipe of described insulation casting furnace is communicated with described ingot casting device selectivity, the first drain pipe of described at least one smelting furnace optionally is communicated with described insulation casting furnace, when the second drain pipe and the described ingot casting device of described insulation casting furnace is in connected state, the first drain pipe of one of them smelting furnace and described insulation casting furnace are in connected state.
In the recovery system of described magnesium and magnesium alloy waste material, the inside of the second crucible of described insulation casting furnace is provided with n second partition that vertically arranges, wherein, n 〉=2, a described n second partition becomes each other n+1 part of fluid connection with the interior separation of described the second crucible, a described n second partition staggers each other, wherein has at least a second partition to be arranged at the inner position near the bottom of described the second crucible.
In the recovery system of described magnesium and magnesium alloy waste material, one of them in described three second partitions is arranged at the inner position near the bottom of described the second crucible, and wherein two are arranged at the inner position near liquid level of described the second crucible.
In the recovery system of described magnesium and magnesium alloy waste material, the second drain pipe of described insulation casting furnace is communicated to the inner position near the bottom of the second crucible of this insulation casting furnace.
In the recovery system of described magnesium and magnesium alloy waste material, the inside of the first crucible of described arbitrary smelting furnace is provided with first dividing plate 2 of vertical setting, and described the first dividing plate becomes each other two portions of fluid connection with the interior separation of the first crucible of this smelting furnace.
In the recovery system of described magnesium and magnesium alloy waste material, the first dividing plate of the inside of the first crucible of described arbitrary smelting furnace is extended to the middle part of this first crucible by the top of this first crucible.
In the recovery system of described magnesium and magnesium alloy waste material, described diffuser includes an inlet pipe and a rotary drive mechanism, described inlet pipe has first part and second section, described first part vertically arranges, the one end is connected to described rotary drive mechanism, the other end is communicated with a plurality of second sections, and described a plurality of second sections radially distribute with respect to the other end of described first part, and an end of described first part also is connected to source of the gas.
In the recovery system of described magnesium and magnesium alloy waste material, described a plurality of second sections are four, and evenly distribute with respect to described first part.
In the recovery system of described magnesium and magnesium alloy waste material, described at least one smelting furnace is two.
Use the method for described system recoveries magnesium and magnesium alloy waste material, may further comprise the steps:
Step 1, in the first crucible of at least one smelting furnace, respectively magnesium and/or magnesium alloy waste material are fused into melt, and the melt in the first crucible of each smelting furnace is carried out removal of impurities process, the process that removal of impurities is processed is: the rare gas element that continues to pass into certain hour by diffuser to melt, make impurity in the melt at the effect float downward of bubble to liquid level, this diffuser is communicated to the position of close bottom of the first crucible of this smelting furnace, when described insulation casting furnace and described ingot casting device are in connected state, have at least a smelting furnace to finish in described at least one smelting furnace the removal of impurities of its melt is processed;
Step 2, one of them first drain pipe of finishing the smelting furnace that the removal of impurities of its melt is processed is communicated with described insulation casting furnace, the first drain pipe is communicated to the inner position near the bottom of the first crucible of this smelting furnace, its melt of processing through removal of impurities is inputed in the second crucible of described insulation casting furnace, make the contained residual impurity of melt of processing through removal of impurities in the second crucible of insulation casting furnace, sedimentation occur, described the second crucible bottom is inclined with respect to the same level face, and the vergence direction of the bottom of described the second crucible is: increase from the side extended height away from laterally closer described second drain pipe of described the second drain pipe gradually with respect to the same level face bottom of described the second crucible;
Step 3, the second drain pipe of described insulation casting furnace is communicated with described ingot casting device, its melt through sedimentation is inputed to described ingot casting device, described ingot casting device will be cast magnesium ingot through the melt of sedimentation.
In the described method, in the described step 1, in the process that removal of impurities is processed, in the described step 2, one of them first drain pipe of finishing the smelting furnace that the removal of impurities of its melt is processed is communicated with described insulation casting furnace, the first drain pipe is communicated to the inner position near the bottom of the first crucible of this smelting furnace, when its melt of processing through removal of impurities being inputed in the second crucible of described insulation casting furnace, retains the melt of certain volume in this smelting furnace.
In the described method, in described step 1, the process that removal of impurities is processed also comprises: pass into the aerosol of flux to melt inside, simultaneously melt is stirred, described aerosol is disperseed to form in rare gas element by flux.
To magnesium and magnesium alloy waste material recovery the time, can select the waste materials such as the less running channel of impurities, rising head to reclaim, this type of waste material accounts for totally very large proportion of waste material, has larger recovery value, reduces simultaneously recovery difficult.The present invention has reserved the opening that sprays flux simultaneously, can process the larger waste material of foreign matter content by flux method is arranged, and also can obtain preferably impurity-eliminating effect.
The waste material of choosing is packed into through sorting and is specified in the charging hopper, have accumulation, preheating that 4-6 hopper carries out waste material, but the hopper weight of loading is 100kg, but the hopper weight of loading can be determined according to the actual needs of recovery system.General preheating temperature is 150 ℃, and this preheating method is static preheating.Just will drop in the smelting furnace through the waste material of preheating afterwards, carry out follow-up fusing and removal of impurities and process.
The present invention includes at least one smelting furnace.In a smelting furnace, at first in smelting furnace, drop into magnesium and magnesium alloy waste material, scrap melting is become melt.The capacity of smelting furnace is 800kg, retain in advance the melt that does not contain impurity (this melt that does not contain impurity is consistent with the composition of the melt for the treatment of removal of impurities that the present invention obtains) of the 200kg that has an appointment in the smelting furnace, burner hearth is warmed up to 680 ℃ ~ 710 ℃, and waste material is melted.
Removal of impurities is treated to the rare gas element that continues to pass into certain hour by diffuser to melt, diffuser is communicated to the position of the close bottom of the first crucible, so that bubble rises to liquid level from the bottom of melt always, in the uphill process of bubble, the impurity of melt is carried into liquid level, thereby realized separating of impurity and melt.When removal of impurities is processed, the first part of inlet pipe vertically arranges, second section is positioned at the other end of first part, inlet pipe, reaches the rare gas element bubble and can be evenly distributed on as much as possible in the magnesium liquid by the rotary jet outlet in motor effect rotation, inlet pipe can be a plurality of, and the outlet side of inlet pipe evenly distributes in the position of the close bottom of the first crucible, so that the formed bubble of rare gas element evenly distributes in melt, so that the effect of removal of impurities is tried one's best.Rare gas element is generally argon gas, and pressure is 0.2MPa ~ 0.4MPa.Passing into the rare gas element time length is generally 10 ~ 20min, and the time length need to be determined according to the effect of removal of impurities.
In the removal of impurities treating processes, can in melt, add the alloying element of adjusting bath composition, in order to supply the alloying constituent that lacks in the waste material.
The melt of processing through removal of impurities need to carry out sample examination, the impurity in the affirmation melt and the content of alloying constituent.If the content of the impurity in the melt is lower than setting numerical value, then this smelting furnace is finished the removal of impurities of melt is processed, can be with the melt transfer in this smelting furnace to being incubated in the casting furnace; Otherwise, continue in melt, to pass into rare gas element.If the alloying constituent in the melt does not reach requirement, then replenish the alloying element of appropriate amount in the melt.
For the lower waste material of foreign matter content, only adopt the way that passes into rare gas element just can realize removal of impurities, obtain preferably impurity-eliminating effect.Relatively high for foreign matter content, by can not realize the waste material of impurity-eliminating effect without flux method, then can adopt the mode of the aerosol rare gas element that adds a small amount of flux to carry out the secondary removal of impurities.Detect the undesirable magnesium liquid of magnesium liquid foreign matter content after namely passing into the rare gas element removal of impurities, continue to pass into a small amount of aerosol and carry out the secondary removal of impurities, improve the removal of impurities ability of recovery system.The aerosol of above-mentioned flux is to be disperseed to form in rare gas element by flux.
In the prior art, normally flux is sprinkling upon the surface of melt, but the impurity-eliminating effect of this mode is relatively poor, is unfavorable for fully contacting and reaction of flux and the interior impurity of melt.Of the present invention when passing into the aerosol of flux, be that the inside to melt passes into this aerosol, follow simultaneously the stirring of melt, so that flux contacts fully with melt, improve the reaction process of flux and impurity, improve dust removal rate.
The waste material impurity of melt liquid level is disposed in the general 12h of the smelting furnace processing of once skimming, and can process according to field condition.
The present invention preferably arranges two smelting furnace, and two smelting furnace melt respectively, the removal of impurities process, to realize the continuous feeding to the insulation casting furnace.Particularly, when the fusing, removal of impurities of carrying out waste material when a smelting furnace exactly processed, another smelting furnace had been finished the removal of impurities of waste material has been processed, and is communicated with the insulation casting furnace, inputs melt to being incubated in the casting furnace; Two smelting furnace are alternately to insulation casting furnace feed.Each smelting furnace capacity is 800kg, and generalized case shifts the amount of melt about 500kg at every turn, and be 10min ~ 20min transfer time.When two smelting furnace are worked simultaneously; reduced the requirement to the amount that once shifts melt; then for any smelting furnace; the amplitude that the liquid level of the melt in its first crucible descends has all reduced; shielding gas can add in the first crucible timely, has reduced the probability that melt is exposed in the air atmosphere and occurs to burn.
The smelting furnace of finishing the removal of impurities processing exports melt in the insulation casting furnace to by the first drain pipe, the first drain pipe is communicated to the position of close bottom of the first crucible of smelting furnace, owing to all float on the liquid level of melt with the impurity of melt extraction, when the bottom from melt begins to shift, then isolated impurity can be brought into again in the insulation casting furnace.When a melt transfer, preferably in smelting furnace, retain the melt of certain volume, and whole melts are not produced.If this time whole melts are produced, the time that follow-up waste material melts will increase greatly, and with the Impurity deposition of melt extraction in the bottom of the first crucible, when the waste material that carries out next round drops into and melts, the impurity that part is deposited on the first crucible bottom has been mixed into again in the melt, when removal of impurities is processed, not only to remove the impurity that itself contains in this waste material of taking turns, also to remove and mix again the impurity of coming in after that part is deposited on the first crucible bottom, this has obviously increased the difficulty of removal of impurities, and can have influence on effect and the efficient of removal of impurities.
Finish the melt transfer of removal of impurities processing to being incubated in the casting furnace, also can contain a small amount of residual impurity in the melt, this part impurity can further sedimentation in the insulation casting furnace.Melt enters from a side of insulation casting furnace, from the opposite side output (i.e. the liquid outlet position of the second drain pipe) along the length direction that is incubated casting furnace.When being incubated casting furnace to ingot casting device continuous wave output melt, melt for advancing with what go out, still because melt can flow through the distance of the length that is incubated casting furnace, can be realized the sedimentation of impurity in this process in the insulation casting furnace.If the insulation casting furnace is not to input continuously melt, but export according to the needs interval certain hour of ingot casting device, melt has certain hour and be in static condition in the insulation casting furnace, and static condition more is conducive to the sedimentation of impurity.Because prior art is in smelting furnace impurity to be carried out sedimentation, the settling time is longer, and final impurity-eliminating effect is also better, but also more can have influence on subsequent production simultaneously the carrying out continuously of---ingot casting---.By the design of insulation casting furnace, then avoided the generation of above-mentioned situation, when obtaining same even better impurity-eliminating effect, the present invention has better dust removal rate, has guaranteed carrying out continuously of subsequent production, has improved greatly production efficiency.
Be provided with three second partitions that vertically arrange in the second crucible of insulation casting furnace, the second crucible is separated into each other four parts of fluid connection, and three second partitions stagger each other.Second partition is not that the top from the second crucible links up to the bottom, its up or below or offer opening with the below up simultaneously so that melt can flow along the length direction of insulation casting furnace.When shifting melt by smelting furnace to the insulation casting furnace; melt liquid level in the insulation casting furnace can fluctuate; on the one hand meeting so that the impurity of the sedimentation of the second crucible bottom float; shielding gas just is difficult to well cover melt liquid level on the other hand, and above-mentioned design is in order to suppress to be incubated the fluctuation of the melt liquid level in the casting furnace.
Preferably, in three second partitions, first second partition 9 and the 3rd second partition 7 are positioned at the position near the close liquid level of the second crucible, the position of the 3rd second partition is near the fluid inlet of the second drain pipe, the upper limb of the 3rd second partition is connected with the top of the second crucible, and near the liquid level the fluid inlet that can reasonable inhibition the second drain pipe fluctuates.First second partition is positioned at the side away from the second drain pipe, and its above and below all is not connected with the second crucible.Second second partition 8 between first second partition and the 3rd second partition is positioned at the position near the bottom of the second crucible, can play the effect that stops the impurity that falls to the second crucible bottom.
Also be provided with similar structure in smelting furnace, the inside of the first crucible of smelting furnace is provided with first dividing plate of vertical setting, and the first dividing plate becomes each other two portions of fluid connection with the interior separation of the first crucible of this smelting furnace.The first dividing plate extends to the middle part of this first crucible from the top of the first crucible.Smelting furnace shifts in the process of melt in the insulation casting furnace, when perhaps dropping into waste material in the smelting furnace, can cause that all the melt liquid level in the smelting furnace fluctuates, and the first dividing plate also is in order to suppress this fluctuation.
The bottom of the second crucible of insulation casting furnace is what be obliquely installed, and increase gradually from the side extended height away from laterally closer second drain pipe of the second drain pipe with respect to the same level face, when migrating out melt by the second drain pipe from the insulation casting furnace, impurity is not easy to be taken out of.
Melt enters in the ingot casting device, is cast magnesium ingot.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification sheets and the embodiment, it can be applied to various suitable the field of the invention fully, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (10)
1. the recovery system of a magnesium and magnesium alloy waste material is characterized in that, comprising:
At least one smelting furnace, the first drain pipe of arbitrary smelting furnace is communicated to the inner position near the bottom of the first crucible of this smelting furnace, arbitrary smelting furnace has the diffuser that passes into rare gas element in the first crucible of this smelting furnace, and this diffuser is communicated to the position of close bottom of the first crucible of this smelting furnace; The insulation casting furnace, the second crucible bottom of described insulation casting furnace is with respect to the horizontal plane inclined, and the vergence direction of the bottom of described the second crucible is: increase gradually with respect to the side extended height of same level face from laterally closer described second drain pipe of the opening for feed of close described insulation casting furnace the bottom of described the second crucible; And
Ingot casting device;
Wherein, the second drain pipe of described insulation casting furnace is communicated with described ingot casting device selectivity, the first drain pipe of described at least one smelting furnace optionally is communicated with described insulation casting furnace, when the second drain pipe and the described ingot casting device of described insulation casting furnace is in connected state, the first drain pipe of one of them smelting furnace and described insulation casting furnace are in connected state.
2. the recovery system of magnesium as claimed in claim 1 and magnesium alloy waste material, it is characterized in that, the inside of the second crucible of described insulation casting furnace is provided with n second partition that vertically arranges, wherein, n 〉=2, a described n second partition becomes each other n+1 part of fluid connection with the interior separation of described the second crucible, and a described n second partition staggers each other, wherein has at least a second partition to be arranged at the inner position near the bottom of described the second crucible.
3. the recovery system of magnesium as claimed in claim 2 and magnesium alloy waste material, it is characterized in that, in described three second partitions one of them is arranged at the inner position near the bottom of described the second crucible, and wherein two are arranged at the inner position near liquid level of described the second crucible.
4. the recovery system of magnesium as claimed in claim 2 and magnesium alloy waste material, it is characterized in that, the inside of the first crucible of described arbitrary smelting furnace is provided with first dividing plate of vertical setting, and described the first dividing plate becomes each other two portions of fluid connection with the interior separation of the first crucible of this smelting furnace.
5. the recovery system of magnesium as claimed in claim 1 and magnesium alloy waste material, it is characterized in that, described diffuser includes an inlet pipe and a rotary drive mechanism, described inlet pipe has first part and second section, described first part vertically arranges, and the one end is connected to described rotary drive mechanism, and the other end is communicated with a plurality of second sections, described a plurality of second section radially distributes with respect to the other end of described first part, and an end of described first part also is connected to source of the gas.
6. the recovery system of magnesium as claimed in claim 5 and magnesium alloy waste material is characterized in that, described a plurality of second sections are four, and evenly distributes with respect to described first part.
7. the recovery system of magnesium as claimed in claim 1 and magnesium alloy waste material is characterized in that, described at least one smelting furnace is two.
8. the method for each described system recoveries magnesium and magnesium alloy waste material in an application such as the claim 1～7 is characterized in that, may further comprise the steps:
Step 1, in the first crucible of at least one smelting furnace, respectively magnesium and/or magnesium alloy waste material are fused into melt, and the melt in the first crucible of each smelting furnace is carried out removal of impurities process, the process that removal of impurities is processed is: the rare gas element that continues to pass into certain hour by diffuser to melt, make impurity in the melt at the effect float downward of bubble to liquid level, this diffuser is communicated to the position of close bottom of the first crucible of this smelting furnace
When described insulation casting furnace and described ingot casting device are in connected state, have at least a smelting furnace to finish in described at least one smelting furnace the removal of impurities of its melt is processed;
Step 2, one of them first drain pipe of finishing the smelting furnace that the removal of impurities of its melt is processed is communicated with described insulation casting furnace, the first drain pipe is communicated to the inner position near the bottom of the first crucible of this smelting furnace, its melt of processing through removal of impurities is inputed in the second crucible of described insulation casting furnace, make the contained residual impurity of melt of processing through removal of impurities in the second crucible of insulation casting furnace, sedimentation occur, described the second crucible bottom is inclined with respect to the same level face, and the vergence direction of the bottom of described the second crucible is: increase gradually with respect to the side extended height of same level face from laterally closer described second drain pipe of the opening for feed of close described insulation casting furnace the bottom of described the second crucible;
Step 3, the second drain pipe of described insulation casting furnace is communicated with described ingot casting device, its melt through sedimentation is inputed to described ingot casting device, described ingot casting device will be cast magnesium ingot through the melt of sedimentation.
9. method as claimed in claim 8, it is characterized in that, in the described step 1, in the process that removal of impurities is processed, in the described step 2, one of them first drain pipe of finishing the smelting furnace that the removal of impurities of its melt is processed is communicated with described insulation casting furnace, the first drain pipe is communicated to the inner position near the bottom of the first crucible of this smelting furnace, when its melt of processing through removal of impurities being inputed in the second crucible of described insulation casting furnace, in this smelting furnace, retain the melt of certain volume.
10. method as claimed in claim 8 is characterized in that, in described step 1, the process that removal of impurities is processed also comprises: pass into the aerosol of flux to melt inside, simultaneously melt is stirred, described aerosol is disperseed to form in rare gas element by flux.
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| WO2016131206A1 (en) * | 2015-02-16 | 2016-08-25 | 谭何易 | Method for producing national-standard magnesium alloy ingots on the basis of magnesium alloy waste material |
| CN107976063A (en) * | 2017-11-29 | 2018-05-01 | 天津镁特威科技有限公司 | A kind of magnesium alloy melting and heat preservation stove with recycling |
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| CN102912156B (en) | 2014-05-07 |
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