SG191495A1 - Method for incinerating carbon-containing dry metallic ash - Google Patents
Method for incinerating carbon-containing dry metallic ash Download PDFInfo
- Publication number
- SG191495A1 SG191495A1 SG2012087995A SG2012087995A SG191495A1 SG 191495 A1 SG191495 A1 SG 191495A1 SG 2012087995 A SG2012087995 A SG 2012087995A SG 2012087995 A SG2012087995 A SG 2012087995A SG 191495 A1 SG191495 A1 SG 191495A1
- Authority
- SG
- Singapore
- Prior art keywords
- hearth
- trough
- ash
- air
- oxygen
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 239000003570 air Substances 0.000 claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000012080 ambient air Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 3
- 239000002956 ash Substances 0.000 description 13
- 238000004064 recycling Methods 0.000 description 5
- 238000005273 aeration Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 206010039509 Scab Diseases 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/023—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Air Supply (AREA)
Abstract
6Method for incinerating carbon-containing dry metallic ashAbstractSThe invention relates to a method for incinerating carbon-containing dry metallic ash and a per tinent device. The method comprises the following steps:10adding the metallic ash into a trough;aerating with ambient air from above, and concurrently, at least for part of the time,injecting air and/or oxygen through the trough hearth;establishing the ignition temperature; 15 e) stirring of the metallic ash by means of a suitable tool;f) whereby the carbon content is reduced to less than 3%; andwhereby steps b), c), and d) can proceed concurrently or in alternating order or pairs or all of these steps can proceed concurrently;step d) can just as well proceed selectively in partial quantities of the metallic ash;20 and whereby the reverse transport of ash through the trough hearth is prevented, whereasthe supply of air and/or oxygen is maintained.Figure 1
Description
Method for incinerating carbon-containing dry metallic ash
The invention relates to a method for incinerating carbon-containing dry metallic ash and a de- vice for implementing said method.
Metallic ash is understood to be the product of primary incineration of recycling material that contains plastic materials and solvents and is to be reprocessed for its noble metal content.
Noble metals can be present in recycling material of this type either in elemental or chemically bound form, e.g. as salts or oxides. The metallic ash can therefore also contain these sub- . stances.
Following primary incineration/carbonisation, said ashes still contain substantial fractions of carbon that should be removed before further recycling steps and/or should be reduced to a fraction of less than 3 %.
US4360380/DE3134733A1 specifies a metal recycling method, in which the incineration of or- ganic fractions is carried out at temperatures below the slag formation temperature of the sili- cate fractions. This is aimed at preventing valuable metals from being included in glass: "The slag formation temperature of quartz is approx. 760°C. Accordingly, if the incineration : proceeds at a temperature between 315 and 480°C and in the presence of sufficient oxygen or of an excess of oxygen with adequate stirring, it has been found that the organic fraction is inci- nerated without undesirable silicates being formed."
Accordingly, DE3134733A1 describes a method having the following features: “Method for recycling selected metal fractions from quariz-containing sludges by incinerating the sludge in order to disintegrate organic fractions followed by acidic leaching of the ash and hydrometallurgical recovery of the metal fractions from the remaining solid and liquid residues, whereby the incineration is carried out at a temperature below the slag formation temperature of silicates in order to prevent metal fractions from being occluded in glass matrices that are not attacked by the subsequent acidic leaching and the hydrometallurgical procedural steps.”
According to DE3134733A1, the process is carried out in a furnace. The efficiency of the : process is said to be increased through stirring and supplying air: "Moreover, it has been evi- : dent that stirring of the sludge aimed at keeping the temperature at an even level throughout and increasing the access of oxygen to the organic material, improved the method significantly.
Obviously, stirring or forced aeration are used in one way or another in many sludge incinera- tion facilities and are not considered to be novel features as such”.
In contrast, the present invention provides a method for incinerating carbon-containing slags in open troughs through overturning on air and includes additional aeration from below, as de- scribed in claim 1. Consistent with DE3134733A1, the prior art is the incineration in open troughs with frequent overturning by means of rakes. Additional aeration from below according to the invention surprisingly reduces the duration of the incineration process by 50 to 80%. This is more than an additive effect and rather represents a surprising synergism. Additional aeration from below according to the invention surprisingly reduces the duration of the incineration process by 50 to 80%. This is more than an additive effect and rather represents a surprising : synergism. It also needs to be noted that the material burns more rapidly after ignition. The overturning by means of rakes is kept for expedient reasons to ensure that no crusts are formed at the hearth region of the troughs or on the surface of the incinerated goods. The carbon con- tent is reduced to less than 3%.
The overturning by means of rakes is kept for expedient reasons to ensure that no crusts are formed at the hearth region of the troughs or on the surface of the incinerated goods. The car- bon content is reduced to less than 3%.
Another option is to enrich the air, which is blown-in from below, with oxygen in order to im- prove the efficiency of incineration.
According to an essential feature of the method according to the invention, any reverse trans- port of ash is prevented whereas the supply of air and/or oxygen is maintained.
In detail, the method comprises the steps of: a) adding metallic ash into a trough; b) aerating from above with ambient air; c¢) injecting air and/or oxygen through the trough hearth; d) establishing the ignition temperature; e) stirring of the metallic ash by means of a suitable tool; f) whereby the carbon content is reduced to less than 3%; whereby steps b), ¢), and d) can proceed concurrently or in alternating order or pairs or all of these steps can proceed concurrently; step d) can just as well proceed selectively in partial quantities of the metallic ash;
and the reverse transport of ash through the trough hearth is prevented, whereas the supply of air and/or oxygen is maintained.
In a convenient embodiment, the incineration process is carried out in a multiple hearth incine- rator at the open top of the trough exposed to ambient air and by means of injecting air from ) below. The time for the carbon fraction to reach a level below 3% is 2 hours.
The invention also relates to a device for implementing a method, according to claim 2, of the type described above in the form of a container, preferably a trough, that comprises a hearth that is aerated from below. :
The hearth comprises means preventing the ash from dropping through the grate, whereas the supply of air and/or oxygen from below is not obstructed.
Preferably, the invention provides a hollow double-hearth trough having an upper hearth and a lower hearth. Openings, such as, e.g., holes or slits, in the upper and lower hearth ensure the supply of air from below, whereas metal fibres, such as a wire mesh or similar material, in the space between the hearths ensures that the ash cannot fully drop through the two hearths. In addition, it is expedient for the openings to be situated not directly across from each other, which results in favourable flow conditions from the start.
Overall, the feature of having a metal fibre-containing double-hearth trough provides a surpri- singly simple solution allowing the desired substance transport from below to proceed while sufficiently impeding the undesired substance transport from above.
Flow guides are another expedient feature that further optimises the flow conditions provided they are situated properly.
The fibres can be present as woven material, fabric, non-woven fabric or knitted material. Pre- ferably, they are knitted.
Fig. 1 shows a preferred embodiment of the device.
This comprises a) a trough a1 b) having a level hearth b2, c) whereby hearth b2 comprises openings ¢3,
d) with metal fibres d4 being arranged below hearth b2 and forming a space d4a, which is d closed in downward direction through e) another trough hearth e5 that is arranged parallel to hearth b2 f) having further openings f6 that are arranged at an offset from said openings ¢3, where- by g) hearth e5 and hearth b2 are connected by means of connecting means g7 in such man- ner that metal fibres d4 are firmly occluded, and h) a space h8 is provided below hearth e5 to which i) means i9 for supplying air or/and oxygen are provided.
Flow guides for optimising the air circulation can be provided in space (h8).
The metal fibres (d4) can be present as woven material, fabric, fleece or knitted material.
Preferably, they are knitted.
Claims (4)
- Claims 1) Method for incinerating carbon-containing dry metallic ash through ° a) adding the metallic ash into a trough; : b) aerating from above with ambient air; c¢) injecting air and/or oxygen through the trough hearth; d) establishing the ignition temperature;e) stirring of the metallic ash by means of a suitable tool;f) whereby the carbon content is reduced to less than 3%; and : whereby steps b), c), and d) can proceed concurrently or in alternating order or pairs or all : of these steps can proceed concurrently; and steps b) and c) proceed concurrently, at least for part of the time;step d) can just as well proceed selectively in partial quantities of the metallic ash . characterised in that the reverse transport of ash through the trough hearth is prevented, whereas the supply of air and/or oxygen is maintained. :
- 2) Device for implementing a method according to claim 1, comprising a) a trough (a1) b) having a level hearth (b2), c) whereby hearth (b2) comprises openings (c3), d) with metal fibres (d4) being arranged below hearth (b2) and forming a space (d4a), which is closed in downward direction through e) another trough hearth (e5) that is arranged parallel to hearth (b2) f) having further openings (f6) that are arranged at an offset from said openings (c3), whe- reby g) hearth (e5) and hearth (b2) are connected by means of connecting means (g7) in such manner that metal fibres (d4) are firmly occluded, and h) a space (h8) is provided below hearth (e5) to which i) means (i9) for supplying air or/and oxygen are provided.
- 3) Device according to claim 2, whereby j) flow guides for optimising the air circulation are provided in space (h8).
- 4) Device according to claim 2 or 3, whereby k) the metal fibres (d4) are present as woven material, fabric, fleece or knitted material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110122139 DE102011122139A1 (en) | 2011-12-22 | 2011-12-22 | Process for burning off carbonaceous dry metallic ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SG191495A1 true SG191495A1 (en) | 2013-07-31 |
Family
ID=47290553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SG2012087995A SG191495A1 (en) | 2011-12-22 | 2012-11-29 | Method for incinerating carbon-containing dry metallic ash |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US20130167760A1 (en) |
| EP (1) | EP2607505B1 (en) |
| JP (1) | JP5805061B2 (en) |
| KR (1) | KR101579343B1 (en) |
| CN (1) | CN103184342B (en) |
| AR (1) | AR089191A1 (en) |
| AU (1) | AU2012258436B2 (en) |
| CA (1) | CA2796899C (en) |
| CL (1) | CL2012003559A1 (en) |
| DE (1) | DE102011122139A1 (en) |
| MX (1) | MX2012014902A (en) |
| PL (1) | PL2607505T3 (en) |
| RU (1) | RU2012155871A (en) |
| SG (1) | SG191495A1 (en) |
| TW (1) | TWI491737B (en) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4147114A (en) * | 1977-11-04 | 1979-04-03 | Thiokol Corporation | Waste treatment system |
| US4308034A (en) * | 1980-05-19 | 1981-12-29 | Hoang Dinh C | Apparatus for incinerating and gasifying biomass material |
| US4360380A (en) | 1980-09-09 | 1982-11-23 | World Resources Company | Process for recovery of metal values from sludges |
| US4385567A (en) * | 1980-10-24 | 1983-05-31 | Solid Fuels, Inc. | Solid fuel conversion system |
| US4466358A (en) * | 1981-06-04 | 1984-08-21 | Christian J Vernon | Solid fuel warm air furnace |
| US4450776A (en) * | 1983-06-10 | 1984-05-29 | Stevenson Robert L | Industrial furnace |
| JPS6246117A (en) * | 1985-08-20 | 1987-02-28 | Tsurumi Gosei Rozai Kk | Gasifying burner for solid combustion matter |
| DE4344906C2 (en) * | 1993-12-29 | 1997-04-24 | Martin Umwelt & Energietech | Process for controlling individual or all factors influencing the combustion on a grate |
| US5605142A (en) * | 1994-04-04 | 1997-02-25 | Parker, Inc. | Portable barbeque |
| US5868084A (en) * | 1995-03-20 | 1999-02-09 | U.S. Scientific, L.L.C. | Apparatus and process for carbon removal from fly ash |
| JP4270688B2 (en) * | 1999-11-22 | 2009-06-03 | 日陶科学株式会社 | Cylindrical handy firing jig |
| JP3873274B2 (en) * | 2001-07-17 | 2007-01-24 | 三菱マテリアル株式会社 | Prefabricated precious metal clay baking equipment |
| US7017500B2 (en) * | 2004-03-30 | 2006-03-28 | International Paper Company | Monitoring of fuel on a grate fired boiler |
| US7776284B2 (en) * | 2006-04-19 | 2010-08-17 | Kusatsu Electric Co., Ltd. | Apparatus of catalyst-circulation type for decomposing waste plastics and organics, and system thereof |
| JP4380783B2 (en) * | 2006-04-19 | 2009-12-09 | 草津電機株式会社 | Waste plastic / organic decomposition method, decomposition apparatus and decomposition system |
| DE202009013233U1 (en) * | 2009-10-01 | 2010-03-04 | Müller, Jürgen | Safety fireplace |
-
2011
- 2011-12-22 DE DE201110122139 patent/DE102011122139A1/en not_active Ceased
-
2012
- 2012-11-27 CA CA2796899A patent/CA2796899C/en not_active Expired - Fee Related
- 2012-11-28 AU AU2012258436A patent/AU2012258436B2/en not_active Ceased
- 2012-11-29 SG SG2012087995A patent/SG191495A1/en unknown
- 2012-11-30 PL PL12008032.0T patent/PL2607505T3/en unknown
- 2012-11-30 EP EP12008032.0A patent/EP2607505B1/en not_active Not-in-force
- 2012-12-10 TW TW101146450A patent/TWI491737B/en not_active IP Right Cessation
- 2012-12-11 AR ARP120104656 patent/AR089191A1/en not_active Application Discontinuation
- 2012-12-17 US US13/716,631 patent/US20130167760A1/en not_active Abandoned
- 2012-12-17 CL CL2012003559A patent/CL2012003559A1/en unknown
- 2012-12-17 MX MX2012014902A patent/MX2012014902A/en unknown
- 2012-12-18 KR KR1020120148180A patent/KR101579343B1/en not_active Application Discontinuation
- 2012-12-21 CN CN201210560956.8A patent/CN103184342B/en not_active Expired - Fee Related
- 2012-12-21 RU RU2012155871/02A patent/RU2012155871A/en not_active Application Discontinuation
- 2012-12-21 JP JP2012279363A patent/JP5805061B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP2607505A1 (en) | 2013-06-26 |
| CN103184342A (en) | 2013-07-03 |
| US20130167760A1 (en) | 2013-07-04 |
| JP5805061B2 (en) | 2015-11-04 |
| TWI491737B (en) | 2015-07-11 |
| KR101579343B1 (en) | 2015-12-21 |
| CN103184342B (en) | 2016-08-03 |
| PL2607505T3 (en) | 2016-11-30 |
| TW201331379A (en) | 2013-08-01 |
| KR20130079171A (en) | 2013-07-10 |
| JP2013134053A (en) | 2013-07-08 |
| CL2012003559A1 (en) | 2014-07-04 |
| MX2012014902A (en) | 2013-06-21 |
| RU2012155871A (en) | 2014-06-27 |
| DE102011122139A1 (en) | 2013-06-27 |
| AU2012258436A1 (en) | 2013-07-11 |
| CA2796899A1 (en) | 2013-06-22 |
| AR089191A1 (en) | 2014-08-06 |
| AU2012258436B2 (en) | 2014-12-04 |
| EP2607505B1 (en) | 2016-05-25 |
| CA2796899C (en) | 2016-03-29 |
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