EP0765686A2 - Procédé pour la séparation d'une fraction ferreuse et d'une fraction minérale, des cendres d'incinération de déchets - Google Patents

Procédé pour la séparation d'une fraction ferreuse et d'une fraction minérale, des cendres d'incinération de déchets Download PDF

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Publication number
EP0765686A2
EP0765686A2 EP96114688A EP96114688A EP0765686A2 EP 0765686 A2 EP0765686 A2 EP 0765686A2 EP 96114688 A EP96114688 A EP 96114688A EP 96114688 A EP96114688 A EP 96114688A EP 0765686 A2 EP0765686 A2 EP 0765686A2
Authority
EP
European Patent Office
Prior art keywords
iron
fraction
moist
mineral
stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP96114688A
Other languages
German (de)
English (en)
Other versions
EP0765686A3 (fr
Inventor
Hermann Kokkelink
Manfred Dr. Render
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dsu Gesellschaft fur Dienstleistungen und Umwellt
Original Assignee
DSU Duisburger Schlackenaufbereitung und Umwelttechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DSU Duisburger Schlackenaufbereitung und Umwelttechnik GmbH filed Critical DSU Duisburger Schlackenaufbereitung und Umwelttechnik GmbH
Publication of EP0765686A2 publication Critical patent/EP0765686A2/fr
Publication of EP0765686A3 publication Critical patent/EP0765686A3/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags

Definitions

  • the invention relates to a method for separating pre-shredded, moist, glazed waste incineration ash in iron and mineral fractions.
  • it relates to the separation of products such as are produced in the treatment of glazed, metal-containing slag from waste incineration or waste pyrolysis plants, such as the thermoselect process.
  • these slags In order to be able to use these slags as road building materials, for example, they must be relaxed and separated from metallic parts as cleanly as possible.
  • the applicant has found that the water contained in these slags leads to strong adsorption in the case of glass-like particles, so that the iron-containing fractions obtained by magnetic separation are contaminated by considerable amounts of mineral components. Magnetic deposition therefore appeared to be unsuitable for efficient separation into iron and mineral fractions.
  • No. 5,328,657 discloses a method for shaping metal particles, a polyorganic acid (for example polyacrylic acid) being added to the metal particles as a binder. The mixture is then poured into molds and, after applying pressure and sintering, is made into metal molded parts.
  • a polyorganic acid for example polyacrylic acid
  • EP 0 257 434 B1 describes a process for treating the bottom ash residue, which results from the combustion of a treated refuse fuel, for the recovery of metallic and other useful plastics from the ash residue.
  • DE 26 09 801 A1 discloses a method for separating constituents from urban solid waste after thermal degradation using conventional measures such as sieving, coarse crushing and magnetic separation, optionally with the separation of particularly voluminous constituents.
  • the invention has set itself the task of developing a simple, inexpensive, reliable process, to process metal-containing, glazed waste incineration slag into usable products and, above all, to ensure that the mineral fraction is relaxed and as clean as possible and therefore also as a building material or Road building material can be used.
  • stage c Since the detailed investigation has shown that the moist, low-iron, mineral fraction from stage c) still contains considerable amounts of iron and therefore does not yet have optimal quality, this fraction is further comminuted in a stage g) and magnetically separated again into a moist, iron-containing fraction and a moist, almost iron-free, mineral fraction, whereupon the iron-containing fraction is combined with the moist iron-containing fraction of stage c) and worked up together in stage d).
  • the low-iron or almost iron-free, mineral fraction of stage c) or h) is preferably separated into fractions of different grain sizes and made available as building material for road construction.
  • a fraction with a grain size of 0 to 4 mm and a fraction with a grain size of 4 to 16 mm can be produced by sieving.
  • the oversize of 16 mm is removed in stage b) and fed back to the pre-comminution.
  • step d) the addition of a powdery, strongly water-binding polyacrylic acid in step d) produces a product which can be prepared easily and with little effort.
  • Comminution is preferably carried out using an impact splitter at peripheral speeds of approximately 10 m / s.
  • the water-binding polyacrylic acid obviously succeeds in eliminating the strong adsorption of the glass-like particles by water, so that a product is produced which can be sieved easily and magnetically.
  • step c) If the still moist, low-iron, mineral fraction from stage c) is to be relaxed, this is preferably done using an impact splitter with peripheral speeds of 35 to 40 m / s. If metallic particles are still exposed through the expansion, these can be magnetically separated in step h). From the iron-free mineral fraction, the mixtures that can be used for road construction are then obtained via screening plants.
  • the magnetic separation takes place in a manner known per se via electromagnets excited by direct current or permanently magnetized rollers which have relatively high flux densities.
  • the material to be separated is preferably passed over a conveyor belt.
  • the non-magnetizable mineral fraction occurs at a different discharge angle than the iron-containing, magnetizable materials.
  • polyacrylic acids The usual commercial products come into consideration as strongly water-binding polyacrylic acids. They are preferably used as a dry powder and mixed with the moist material. The need for such polyacrylic acids is in the range from 0.05 to 0.3%. With a water content of 5%, 0.1% polyacrylic acid is generally sufficient.
  • Another advantage of the process according to the invention is that, despite the addition of a powder, neither the powder nor the product formed in the process tend to become dusty.
  • the pre-shredded, moist product is passed from the feed hopper 1 via the metering belt 2 to a conveyor belt 4, from which a block magnet 3 separates the coarse iron parts.
  • the material is separated into the main fraction and oversize 6 by means of a sieve 5.
  • the oversize 6 can be returned to the pre-comminution.
  • the material reaches the magnetic drum 8, which separates magnetizable iron and parts connected to iron and feeds it into the intermediate store 9.
  • the water-binding polyacrylic acid is added from the binder silo 11.
  • the two fractions get into the mixer 13.
  • the mixture reaches the impact splitter 15. From there, the material reaches the magnetic drum 17 via the conveyor belt 16.
  • the iron and the highly magnetizable parts reach it Via the conveyor belt 18 to the heap 19.
  • the mineral fraction which is not sufficiently magnetizable is preferably fed back via the conveyor belt 20 into the main flow for non-magnetizable mineral material, specifically into the distributor slide 21, which either further crushes the material via the impact splitter 22 and via the conveyor belt 23 for further magnetic separation from the magnetic drum 24 or directly to the screen 26, which separates coarse-grained and fine-grained mineral granules from one another.
  • the magnetizable fraction from the magnetic separation 24 reaches the intermediate storage 9 via the conveyor belt 25, where it is further processed together with the magnetizable material of the magnetic separation 8.
  • the method according to the invention is thus able to carry out a clean separation, the costs being very low. Apart from the small amounts of water-absorbing polyacrylic acid, no other substances are required. Magnetic separation devices, impact splitters, metering troughs, distribution chutes and conveyor belts are standard devices which are used in combination with one another according to the invention.

Landscapes

  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP96114688A 1995-09-29 1996-09-13 Procédé pour la séparation d'une fraction ferreuse et d'une fraction minérale, des cendres d'incinération de déchets Ceased EP0765686A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995136374 DE19536374C1 (de) 1995-09-29 1995-09-29 Verfahren zur Auftrennung von Müllverbrennungsaschen in Eisen und mineralischen Fraktionen
DE19536374 1995-09-29

Publications (2)

Publication Number Publication Date
EP0765686A2 true EP0765686A2 (fr) 1997-04-02
EP0765686A3 EP0765686A3 (fr) 1997-07-16

Family

ID=7773616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114688A Ceased EP0765686A3 (fr) 1995-09-29 1996-09-13 Procédé pour la séparation d'une fraction ferreuse et d'une fraction minérale, des cendres d'incinération de déchets

Country Status (2)

Country Link
EP (1) EP0765686A3 (fr)
DE (1) DE19536374C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007057106A1 (de) * 2007-11-26 2009-05-28 Hanseatisches Schlackenkontor Gmbh Verfahren zur Herstellung eines verdichtungsfähigen Schlackegranulats

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1192994B (de) * 1964-11-09 1965-05-20 Schuechtermann & Kremer Verfahren zum Aufbereiten der Rueckstaende aus der Verbrennung von Muell
FR2303600A1 (fr) * 1975-03-12 1976-10-08 Rech Geolog Miniere Procede mecanique de separation des constituants des rejets solides urbains apres degradation thermique ou de rejets industriels similaires
CA1269355A (fr) * 1985-10-24 1990-05-22 Shaneway Inc. Systeme pour separer les elements metalliques ferreux et non ferreux recuperables contenus dans les dechets d'incineration
US4669397A (en) * 1986-08-21 1987-06-02 Smith & Mahoney, P.C. Recovery of useful materials from refuse fuel ash
JP2708426B2 (ja) * 1987-07-29 1998-02-04 三菱化学株式会社 安定化高吸水性樹脂粒子の製造法
US5174509A (en) * 1991-06-21 1992-12-29 Resource Recycling, Inc. Incinerated waste material treatment
US5328657A (en) * 1992-02-26 1994-07-12 Drexel University Method of molding metal particles
DE4339158A1 (de) * 1993-11-16 1995-05-18 Friedrich Teufert Verfahren zum Abtrennen von Metallen aus trockenen Gemischen aus Metallen und anorganischen und/oder organischen Stoffen

Also Published As

Publication number Publication date
DE19536374C1 (de) 1996-11-14
EP0765686A3 (fr) 1997-07-16

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