CN104328282A - Method for recovering metal from aluminum-based or zinc-based waste powder - Google Patents
Method for recovering metal from aluminum-based or zinc-based waste powder Download PDFInfo
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- CN104328282A CN104328282A CN201410648610.2A CN201410648610A CN104328282A CN 104328282 A CN104328282 A CN 104328282A CN 201410648610 A CN201410648610 A CN 201410648610A CN 104328282 A CN104328282 A CN 104328282A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a metal recovery method and particularly relates to a method for recovering metal from aluminum-based or zinc-based waste powder. The method comprises the following steps: uniformly mixing the metal waste powder with an additive, wherein the using amount of the additive is 0.5%-3% the weight of the metal waste powder and the additive is one of paraffin wax, rubber, camphor, plastic, graphite powder, higher alcohols, stearic acid and stearate; pressing the mixture of the metal waste powder and the additive into a blocky or spherical compact by adopting a single-shaft pressing way, wherein the pressing pressure is 10-800MPa; performing heat preservation on the compact after forming for 0.5-2h at the temperature which is 50-300 DEG C higher than the melting point of the metal, liquefying and converging the metal, converging the liquid-state metal at a bottom layer, floating oxides above the liquid-state metal to realize separation and further recovering the metal and the oxides respectively. The method provided by the invention has the advantages of high direct recovery rate of the metal, low reagent consumption, low cost and variable processing capacity, and is simple to oeprate.
Description
Technical field
The present invention relates to a kind of metal recovery processes, particularly a kind of method of Footwall drift from aluminium base or zinc-base give up powder.
Background technology
Because chemical property is active, the scrap metal being representative with aluminium base and zinc-base or the Surface Creation of powdered alloy have fine and close oxide film.These oxide film stability are strong, are not easily reduced, and reclaim cause a series of disadvantageous effect to the give up smelting of powder of metal.
In Molten, the give up oxide film of powder of metal hinders the convergence of liquid metal, increases the resistance between metal-powder, causes the increase of power consumption.Some useless Powder Particle Size is thin, loose density is low, and a large amount of powder floats on fused salt surface, is unfavorable for normally carrying out of electrolysis.In addition, the oxide compound comprised in useless powder can change electrolyte ingredient, is even deposited in electrolyzer, affects carrying out continuously of electrolytic process.
In fractionation by distillation process; no matter be under vacuum environment; or under the environment of protection of inert gas; the metal powder surface film oxide that gives up on the one hand will hinder the convergence of liquid metal; also the evaporation of gaseous metal will be hindered on the other hand; compared to reguline metal, give up time of powder fractionation by distillation of metal significantly extends.In addition, because useless Powder Particle Size is thin, mobility strong, in still-process, the useless powder of part will be taken out of with air-flow, normally carrying out of impact distillation operation.For the distillation reactor of non-stop run, after in useless powder, metal reclaims respectively, residual oxide compound not easy-clear, long term accumulation, by blocking pipeline, affects the flowing of liquid metal, needs regular blowing out to remove.
Above-mentioned smelting sepn process is all at high temperature carried out, and relative to process metal blocks, the powder if the metal that direct process contains oxide film gives up, oxide film will significantly elongate the high-temperature service time to the inhibition of mass transfer, and energy consumption is increased.Therefore, if take certain means to be separated with oxide compound by the metal in useless powder in advance, obtain metal blocks, then enter further element sepn process, then significantly can reduce energy consumption.
Summary of the invention
The object of this invention is to provide a kind of method of Footwall drift from aluminium base or zinc-base give up powder, overcome metal and to give up the inhibition of powder surface film oxide to mass transfer, realize being separated of metal and oxide compound, obtain the metal blocks of applicable subsequent smelting needs.
Technical scheme of the present invention: a kind of method of Footwall drift from aluminium base or zinc-base give up powder, comprises the following steps:
Give up metal powder and auxiliary agent Homogeneous phase mixing, auxiliary dosage be metal give up grain weight amount 0.5% to 3% between; The existing lubricated metal of auxiliary agent gives up the effect of powder, and having reductive action again, can be the mixture of one or more of paraffin, rubber, camphor, plastics, Graphite Powder 99, higher alcohols, stearic acid and stearate.
Adopt the mode of single shaft compacting, given up by metal powder and agent mixture are pressed into bulk or spherical pressed compact, and pressing pressure is at 10 to 800MPa; Moulding press die wall full-filling stearic acid, stearate, higher alcohols or paraffin lubricate, to reduce ejection pressure.
Pressed compact after shaping is incubated 0.5 to 2 hour in the temperature higher than melting point metal 50 to 300 DEG C, metal is by liquefaction and converge, and pressed compact is molten bursts, and liquid metal converges in bottom, oxide compound swims on liquid metal and is separated with it, and metal and oxide compound reclaim respectively.
The method that the present invention recommends is inserted by pressed compact in the fused salt of temperature higher than melting point metal 50 to 300 DEG C and is incubated.Fused salt had both been conducive to heat transfer, can completely cut off again the oxidation that air prevents liquid metal, can also promote the phase-splitting of metal and oxide compound, and in minimizing metal blocks, oxide compound is mingled with.Molten salt system can not react with metal, can be the mixture of one or more of lithium chloride, sodium-chlor, Repone K, calcium chloride and strontium chloride, and fused salt add-on should be able to cover pressed compact surface.
Pressed compact is incubated 0.5 to 2 hour in high-temperature molten salt, and in pressed compact, metal liquefaction converges in bottom.And under the effect of reductibility auxiliary agent, partial metal oxide thing can be reduced, the oxide powder that minority can not be reduced is distributed in fused salt, and is gathered into bulk, is accumulated to Separation and Recovery to a certain degree.
Advantage of the present invention is: metal straight yield is high, and reagent consumption is few, and cost is low, simple to operate, and treatment capacity is changeable.
Embodiment
Embodiment 1
Give up powder for raw material with Zinc-tin alloy, and the ratio in 1% is allocated Graphite Powder 99 into and is mixed, and adopts the die wall of Zinic stearas lubrication moulding press, respectively with the pressure of 10MPa, 50MPa, 200MPa, 500MPa and 800MPa, useless powder is pressed into the pressed compact of high 2cm.Pressed compact is inserted 350 DEG C of stove inside holding again, the record pressed compact liquefaction molten time of bursting.Result shows, 5 sample molten routed times and pressing pressure are inversely proportional to, and 800MPa obsession obtains pressed compact and within 6 minutes, just starts softening molten routed, within 15 minutes, just thoroughly liquefies; It is slow that 50MPa obsession obtains pressed compact softening rate, and after 2.5 hours, Integral melting is burst; 10MPa obsession obtains after pressed compact is incubated 4 hours and substantially moltenly to burst.
Embodiment 2
The powder that given up by 350g hard lead mixes with 3g Zinic stearas, uses the die wall of Zinic stearas lubrication moulding press, under the pressure of 200MPa, useless powder is pressed into bulk, is inserted corundum crucible after the demoulding, 500 DEG C are incubated 0.5 hour, after cooling, crucible bottom is reguline metal layer.
Embodiment 3
The powder that given up by 350g hard lead mixes with 3g Zinic stearas, use the die wall of Zinic stearas lubrication moulding press, under the pressure of 200MPa, useless powder is pressed into bulk, being inserted temperature after the demoulding is the fused salt mixt that lithium chloride, Repone K and the strontium chloride of 500 DEG C is formed, and is incubated 0.5 hour, after cooling, crucible bottom is reguline metal layer, any surface finish.
Embodiment 4
The powder that given up by 250g Zinc-tin alloy mixes with 2g Zinic stearas and 3g synthetic resin moulding compound, use the die wall of Zinic stearas lubrication moulding press, under the pressure of 150Mpa, useless powder is pressed into bulk, being inserted temperature after the demoulding is the fused salt mixt that lithium chloride, Repone K and the calcium chloride of 450 DEG C is formed, be incubated 0.5 hour, the metal in useless powder and oxide compound layering are also reclaimed respectively.
Embodiment 5
The powder that given up by 200g aluminum magnesium alloy mixes with 1g paraffin, use the die wall of paraffin lubrication moulding press, under the pressure of 500MPa, useless powder is pressed into bulk, being inserted temperature after the demoulding is the sodium-chlor of 600 DEG C and the fused salt mixt of calcium chloride formation, be incubated 0.5 hour, the metal in useless powder and oxide compound layering are also reclaimed respectively.
Embodiment 6
The powder that given up by 300g aluminium-zinc alloy mixes with 6g stearyl alcohol, use the die wall of stearyl alcohol sliding formwork press, under the pressure of 400MPa, useless powder is pressed into bulk, being inserted temperature after the demoulding is the sodium-chlor of 600 DEG C and the fused salt mixt of calcium chloride formation, be incubated 0.5 hour, the metal in useless powder and oxide compound layering are also reclaimed respectively.
Embodiment 7
The zinc powder that given up by 300g mixes with 5g Zinic stearas, use the die wall of stearic acid lubrication moulding press, under the pressure of 50MPa, useless powder is pressed into bulk, being inserted temperature after the demoulding is the calcium chloride of 520 DEG C and the fused salt mixt of sodium-chlor formation, be incubated 2 hours, the metal in useless powder and oxide compound layering are also reclaimed respectively.
Embodiment 8
400g aluminium scrap powder is mixed with 5g camphor powder and 5g rubber powder, use the die wall of paraffin sliding formwork press, under the pressure of 150MPa, useless powder is pressed into bulk, being inserted temperature after the demoulding is the sodium-chlor of 700 DEG C and the fused salt mixt of calcium chloride formation, and be incubated 1.5 hours, the metal in useless powder converges and is deposited on bottom, alumina dispersion is in fused salt, and metallic surface is without obvious oxide inclusion.Water-soluble after above-mentioned fused salt cooling, filter to obtain alumina solid, filtrate evaporative crystallization can return use again.
Claims (4)
1. the method for Footwall drift from aluminium base or zinc-base give up powder, is characterized in that: comprise the following steps:
Give up metal powder and auxiliary agent Homogeneous phase mixing, and auxiliary dosage is that metal gives up 0.5% to 3% of grain weight amount, and auxiliary agent is the mixture of one or two or more kinds of paraffin, rubber, camphor, plastics, Graphite Powder 99, higher alcohols, stearic acid and stearate;
Adopt the mode of single shaft compacting, the mixture of given up by metal powder and auxiliary agent is pressed into block or spherical pressed compact, and pressing pressure is at 10 to 800MPa;
Pressed compact after shaping is incubated 0.5 to 2 hour in the temperature higher than melting point metal 50 to 300 DEG C, and metal is by liquefaction and converge, and liquid metal converges in bottom, and oxide compound swims on liquid metal and is separated with it, and metal and oxide compound reclaim respectively.
2. the method for a kind of Footwall drift from aluminium base or zinc-base give up powder according to claim 1, it is characterized in that: pressed compact is inserted in the fused salt of temperature higher than melting point metal 50 to 300 DEG C and heat, fused salt is the mixture of one or two or more kinds of lithium chloride, sodium-chlor, Repone K, calcium chloride and strontium chloride, and fused salt add-on should be able to cover pressed compact surface.
3. the method for a kind of Footwall drift from aluminium base or zinc-base give up powder according to claim 1, is characterized in that: moulding press die wall full-filling stearic acid, stearate, higher alcohols or paraffin lubricate.
4. the method for a kind of Footwall drift from aluminium base or zinc-base give up powder according to claim 1, it is characterized in that: preferred version is: mix with 2g Zinic stearas and 3g synthetic resin moulding compound ratio in the 250g Zinc-tin alloy powder that gives up, use the die wall of Zinic stearas lubrication moulding press, under the pressure of 150Mpa, useless powder is pressed into bulk, being inserted temperature after the demoulding is in the fused salt mixt that forms of lithium chloride, Repone K and the calcium chloride of 450 DEG C, be incubated 0.5 hour, the metal in useless powder and oxide compound layering are also reclaimed respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410648610.2A CN104328282A (en) | 2014-11-17 | 2014-11-17 | Method for recovering metal from aluminum-based or zinc-based waste powder |
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| CN201410648610.2A CN104328282A (en) | 2014-11-17 | 2014-11-17 | Method for recovering metal from aluminum-based or zinc-based waste powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528822A (en) * | 2020-11-19 | 2021-10-22 | 江西理工大学 | Method for recovering tungsten, molybdenum and vanadium from high-alkaline solution and regenerating sodium hydroxide |
| CN113981233A (en) * | 2021-11-15 | 2022-01-28 | 西安西热锅炉环保工程有限公司 | System and method for recovering metal by using non-metal mother liquor |
Citations (6)
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| JPS50131616A (en) * | 1974-04-04 | 1975-10-17 | ||
| US4030914A (en) * | 1976-04-12 | 1977-06-21 | Alumax Mill Products, Inc. | Method of treating aluminum drosses, skims and slags |
| CN1654687A (en) * | 2004-02-09 | 2005-08-17 | 株式会社理光 | Refining material for reductive steel refining and granulation method thereof |
| CN101135008A (en) * | 2006-08-31 | 2008-03-05 | 宝山钢铁股份有限公司 | High-heat direct reduction dezincing method for zinc-containing dust carbon-bearing briquette |
| CN102094120A (en) * | 2011-03-16 | 2011-06-15 | 湖南江滨机器（集团）有限责任公司 | Process for recovering aluminum scraps |
| CN103215464A (en) * | 2012-01-19 | 2013-07-24 | 湖南金联星特种材料股份有限公司 | Method for making aluminum-vanadium intermediate alloy through utilizing vanadium-aluminum alloy and aluminum |
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2014
- 2014-11-17 CN CN201410648610.2A patent/CN104328282A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50131616A (en) * | 1974-04-04 | 1975-10-17 | ||
| US4030914A (en) * | 1976-04-12 | 1977-06-21 | Alumax Mill Products, Inc. | Method of treating aluminum drosses, skims and slags |
| CN1654687A (en) * | 2004-02-09 | 2005-08-17 | 株式会社理光 | Refining material for reductive steel refining and granulation method thereof |
| CN101135008A (en) * | 2006-08-31 | 2008-03-05 | 宝山钢铁股份有限公司 | High-heat direct reduction dezincing method for zinc-containing dust carbon-bearing briquette |
| CN102094120A (en) * | 2011-03-16 | 2011-06-15 | 湖南江滨机器（集团）有限责任公司 | Process for recovering aluminum scraps |
| CN103215464A (en) * | 2012-01-19 | 2013-07-24 | 湖南金联星特种材料股份有限公司 | Method for making aluminum-vanadium intermediate alloy through utilizing vanadium-aluminum alloy and aluminum |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113528822A (en) * | 2020-11-19 | 2021-10-22 | 江西理工大学 | Method for recovering tungsten, molybdenum and vanadium from high-alkaline solution and regenerating sodium hydroxide |
| CN113528822B (en) * | 2020-11-19 | 2022-04-08 | 江西理工大学 | Method for recovering tungsten, molybdenum and vanadium from high-alkaline solution and regenerating sodium hydroxide |
| CN113981233A (en) * | 2021-11-15 | 2022-01-28 | 西安西热锅炉环保工程有限公司 | System and method for recovering metal by using non-metal mother liquor |
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