US3848392A - Method for disposal of industrial wastes - Google Patents

Method for disposal of industrial wastes Download PDF

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Publication number
US3848392A
US3848392A US40639573A US3848392A US 3848392 A US3848392 A US 3848392A US 40639573 A US40639573 A US 40639573A US 3848392 A US3848392 A US 3848392A
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US
United States
Prior art keywords
press
disposal
industrial wastes
shaped article
resulting
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.)
Expired - Lifetime
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English (en)
Inventor
K Tezuka
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.)
Tezuka Kosan KK
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Tezuka Kosan KK
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Filing date
Publication date
Priority claimed from JP47103650A external-priority patent/JPS4963266A/ja
Priority claimed from JP48071119A external-priority patent/JPS5221826B2/ja
Application filed by Tezuka Kosan KK filed Critical Tezuka Kosan KK
Application granted granted Critical
Publication of US3848392A publication Critical patent/US3848392A/en
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/0463—Hazardous waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/20—Agglomeration, binding or encapsulation of solid waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0068—Embedding lost cores
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/008—Sludge treatment by fixation or solidification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/18—Cyanides
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • ABSTRACT This invention is to convert industrial wastes such as sludges, deposits and cyanides, which cause environmental pollution, to innoxious solid blocks by incorpo- Oct. 18, 1972 Japan 47-103650 rating a coagulant into Such industrial waste kneading June 23, 1973 Japan 48-71119 the mixture, press shaping the kneaded mixture, Scab ing the outer periphery of the shaped article by means [52] US.
  • This invention relates to a method for disposal of industrial wastes. More particularly, the invention relates to a method for disposal of industrial wastes discarded from chemical factories and plants, such as sludges, deposits and wastes containing harmful substances such as cyanides.
  • This invention has been achieved as a result of research works made with a view to satisfying theabove demand held in the art.
  • a secondary object of this invention is to provide a method for disposal of industrial wastes according to which they can be converted to innoxious solid blocks by incorporating a coagulant into an industrial waste, kneading the mixture and solidifying it by the pressshaping method.
  • Another object of this invention is to provide a method for disposal of industrial wastes according to which industrial wastes are press-shaped into predetermined solid blocks which can be utilized in prescribed application fields, can be directly discarded in the sea or river without causing any environmental pollution, or can be used for reclamation, construction and the like.
  • a still further object of this invention is to provide a method for disposal of industrial wastes according to which industrial wastes are shaped into solid blocks, the peripheries of these blocks are wrapped with a predetermined wrapping material and then, they are sealed completely with concrete.
  • a method for disposal of industrial wastes which comprises the steps of incorporating a coagulant into the starting waste, kneading the mixture, press-shaping the resulting kneaded mixture, sealing tHe resulting shaped article with a cement material,
  • FIG. 1 is a flow chart'illustrating all the steps of the method of this invention.
  • FIG. 2 is a perspective view illustrating an embodiment of the apparatus to be used for practice of the method of this invention.
  • FIG. 3 and 4 are views illustrating sections of concrete-coated blocks of industrial wastes formed according to the 'method of this invention.
  • FIG. 5 is a longitudinally sectional view illustrating the steps of forming concrete-coated blocks of indus trial wastes according to the frame-molding method of this invention.
  • FIG. 6- is a diagram illustrating the side of an operation room for formation of concrete-coated blocks of industrial wastes according to the frame-molding method of this invention.
  • FIG. 7 is a perspective view illustrating a knockdown type frame to be used in the frame-molding method of this invention.
  • An industrial waste discharged in a large quantity from a chemical factory or the like, such as sludges, deposits and the like is thrown into a hopper 2 of a compression casing l which has an opening on the upper surface thereof and has a rectangular parallelepiped form.
  • oil pressure presses 3 and 3 On one end of a longer side of the casing 1' there are provided oil pressure presses 3 and 3.
  • -A pressure block 5 is mounted on a ram 4 of each oil pressure press 3 so that it can slide in the compression casing l in the longitudinal direction.
  • a silo 6 maintained at a predetennined height.
  • coagulants such as cement.
  • the lower portion of the silo 6 is connected to the compression casing l.
  • Handles 7 and 7 are mounted at this connecting area to feed the contents of the silo 6 into the casing 1 as occasion demands.
  • an extrusion block 8 is mounted on the side of the compression casing l where the ,silo 6 is disposed, in a manner such that it can move forwardly and backwardly in the casing 1' through an oil pressure press 9 in the direction vertical to the moving direction of said pressure block 5. On the the starting waste is compressed. After the pressure block has been retreated to such an extent that the extrusion block 8 can be actuated, the coagulant contained in the silo 6 is fed in a predetermined amount into the compression casing l by opening handles 7 and.
  • the extrusion block 8 is actuated to mix the industrial waste with the cement coagulant, and mixture is extruded and allowed to fall on the mixer 11 through the opening 10.
  • the mixer 11 is disposed below the extrusion opening and comprises a cylindrical receiver 12 having an opening and an agitator 13 mounted rotatably in the interior of the cylindrical receiver 12.
  • the agitator 13 is connected to a suitable drive source, for instance, an electric motor, and a shute 14 is mounted below the receiver 12.
  • the drive source is actuated to rotate the agitator 3, and the mixture which has fallen on the receiver 12 is kneaded by the agitator 13 which is thus rotated. As a result, there is formed a homogeneous mixture of the cement coagulant and industrial waste.
  • the kneaded mixture is then forwarded to a shaping press 15 through the shute 14. It is preferred that a dismountable auxiliary shute 14a is provided to connect the shute 14 to a shaping casing 16 of the shaping press 15.
  • the kind of the coagulant to be used in this invention is not limited to cement, but gypsum, lime and other synthetic coagulants can be used in this invention. It is preferred that the mixing ratio of such coagulant and the industrial waste is within a range of from about 30: 7 to about 4 6.
  • the shaping press 15 comprises the shaping casing 16, a pressure block 17 movable forwardly and backwardly in the lengthwise direction in the casing 16 and an extrusion block 18 movable forwardly and backwardly in the widthwise direction in the casing 16.
  • Each of these blocks includes drive means such as oil pressure presses 3 and 9 and ram.
  • a hopper 19 and an optionally openable and closable lid 20 are mounted on the shaping casing 16, and a driving means including an oil pressure press 20a and a ram 20b is mounted on the lid 20 to open and close the lid 20.
  • a driving means including an oil pressure press 20a and a ram 20b is mounted on the lid 20 to open and close the lid 20.
  • a slide door 22 acting as a pressure-resistant wall of the extrusion block 18 is connected to an oil pressure press 24 via a ram 23 to optionally open and close the extrusion opening 21.
  • a wrapping device is attached to this extrusion opening 21. More specifically, this extrusion opening 21 extends along a certain predetermined length and has an opening 25.
  • a wrapping chamber 27 having a slide door 26.
  • the opening 25 is formed by cutting away the side walls and ceiling of the extended portion of the extrusion opening 21 along a length sufficient to receive therein a preformed wire net case 28 having an inlet opening defined by projecting slides.
  • An oil pressure press 29 is mounted on the slide door 26 through a ram so as to optionally open and close the outer side end of the wrapping chamber 27, while the inner side end of the wrapping chamber is always opened.
  • the wrapping device should be provided in the state attached to the shaping press 15, but the wrapping device may be provided separately. Accordingly, press-shaped blocks need not always be wrapped.
  • the wrapping device is provided separately, there may be employed those previ ously proposed by the inventor in U.S. Pat. Nos. 3,451,185, 3,451,190 and 3,514,921. These wrapping device are not disclosed as independent devices but as attachments to apparatuses for disposal of wastes and refuses.
  • the kneaded mixture fed in the shaping casing 16 of the shaping press 15 is press-shaped. More specifically,
  • the pressure block 17 is moved in the shaping casing 16 in the lengthwise direction and the extrusion block 18 is actuated to press the kneaded mixture toward the side of the slide door 22.
  • the oil pressure press 24 is actuated to draw the ram 23
  • the slide door 22 opens the extrusion opening 21.
  • the oil pressure press 29 is driven to draw out the slide door 26 from the wrapping chamber to form an opening on the outer side of the wrapping chamber 27, and the wrapped, press-shaped block 31 is withdrawn from this opening by further advance of the extrusion block 18.
  • the wire net case 28 is not employed, only a press shaped unwrapped block is withdrawn.
  • the wrapping material to be used in this invention is not limited to a wire net case but synthetic resin sheets, metallic sheets such as zinc-plated steel sheets, vinyl resin-coated wire nets and vinyl resin-coated metallic sheets can be used in this invention.
  • a wire net urges the adhesion of the concrete coating to the press-shaped block.
  • a synthetic resin sheet has a water-impermeability and a high resistance, if such synthetic resin sheet is used as a wrapping material, these preferred properties are given to the resulting wrapped block.
  • a metallic sheet can be used for coating the entire surface of a block to be wrapped. In case such metallic sheet or wire net is coated with a vinyl resin or the like and is subjected to the rust-preventive treatment, the durability is further enhanced. After such wrapping step, the press-shaped block of the industrial waste is forwarded to the next sealing step.
  • a concrete case 32 having an opening on the upper surface thereof is used for inserting the press-shaped block therein.
  • This case 32 is prefonned in a separate factory or the like.
  • the pressshaped block 31 formed by means of the shaping press 15 is packed in the case 32 and the upper opening of the case 32 is sealed with raw concrete.
  • the configuration and inner capacity of the case 32 are decided appropriately depending on the size of the press-shaped block and the like. It is preferred that reinforcing steel bars 34 are embedded in the case 32 at the time of preparation thereof and hanging rings 35 are attached to expose ends of these reinforcing bars 34. These rings 34 are effective as hanging means for transportation of the concrete case..
  • the frame-molding method is performed in the following manner.
  • a water-impermeable sheet 36 such as a vinyl resin sheet is spread on the floor E of the operation room, and a mold frame 37 of the knock-down type is constructed on the water-impermeable sheet 36.
  • Crushed concrete blocks 38 obtained by demolition of a building are placed as riprapping at the central portion of the inner bottom of the mold frame 37.
  • Raw concrete 39 is placed in the frame in a height corresponding almost to the height of this riprapping to form a base seat for a wrapped, or unwrapped press-shaped article 31 or the like.
  • the pressshaped article 31 obtained at the preceding step is placed and fixed at the central portion of the base seat.
  • a wire or rope 41 having hanging rings 40 and 40 at both ends thereof is wound on the lower bottom of the press-shaped article 31, and both ends of the wire or rope are stretched upwardly over the upper side of the frame 37.
  • raw concrete 42 is filled in the interior of the frame 37 to such an extent that the press-shaped article 31 is completely covered with concrete, the filled concrete has a predetermined thickness and hanging rings 40 and 40 are exposed from the upper surface of the filled concrete.
  • the assembly is allowed to stand still for a time necessary for aging and solidification of the concrete.
  • the knock-down type frame 37 is disjointed and removed, and as shown in FIG. 4, the resulting concrete block 43 is obtained and transported to a predetermined stock yard or the like.
  • FIG. 6 An apparatus such as shown in FIG. 6 is employed for embodying the above frame-molding operation.
  • This apparatus comprises a gate-like frame 44 having a span sufficient for aligning a predetermined number of molding frames 37 and a running crane 45 hung over the frame 44. It is sufficient that the height of the frame 44 is about two times the height of the molding frame 37.
  • the running crane 44 has a power capable of lifting the molding frames 37, it is preferred that it has a power capable of lifting concrete blocks 43 as well as the molding frames 37.
  • the molding frame 37 there is employed, for instance, a bottomless rectangular cylinder composed of four side planks 46 connected to one another, such as shown in FIG. 7. Each of side planks has a hanging rope 47 on the upper end thereof and it can optionally be lifted up.
  • projecting convex joints 48 of one side plank are linked with concave joints 49 of the other side plank, whereby close bondage is attained between every two adjoining side planks.
  • a penetrating hole 51 is formed on each joint so that a pin 50 can penetrate through said hole 51.
  • a method for disposal ofindustrial wastes which comprises the steps of incorporating a coagulant into the starting waste, kneading the mixture, press-shaping the resulting kneaded mixture, sealing the resulting shaped article with a cement material, and aging and solidifying the sealed, shaped article.
  • a method for disposal of industrial wastes according to claim 1 wherein a molding frame is used at the sealing step.
  • a method for disposal of industrial wastes according to claim 1 wherein a preformed concrete case is used at the sealing step.
  • a method for disposal of industrial wastes according to claim 1 wherein the starting waste is a harmful substance such as a sludge, a deposit or a cyanidecontaining material.
  • a method for disposal of industrial wastes according to claim 1 wherein at the sealing step hanging rings are mounted on the shaped article forwarded to' the sealing step.
  • a method for disposal of industrial wastes which comprises the steps of incorporating a coagulant into the starting waste, kneading the resulting mixture, press-shaping the resulting kneaded mixture, wrapping the resulting shaped article, sealing the resulting wrapped article with a cement material,- and aging and solidifying the sealed, wrapped article.
  • a method for disposal of industrial wastes according to claim 6 wherein the wrapping step includes applying a wire net to the outer periphery of the pressshaped article.
  • the wrapping step includes applying a synthetic resin sheet to the outer periphery of the press-shaped article.
  • a method for disposal of industrial wastes according to claim 6 wherein the wrapping step includes applying a metallic sheet to the outer periphery of the press-shaped article.
  • a method for disposal of industrial wastes includes applying a wire net reinforced with a synthetic resin to the outer periphery of the press-shaped article.
  • a method for disposal of industrial wastes which comprises the steps of incorporating a coagulant into the starting waste, kneading the resulting mixture, press-shaping the resulting kneaded mixture, wrapping the resulting shaped article, press-shaping secondarily the resulting shaped article, sealing the resulting wrapped and press-shaped article with a cement material, and aging and solidifying the sealed article.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing Of Solid Wastes (AREA)
US40639573 1972-10-18 1973-10-15 Method for disposal of industrial wastes Expired - Lifetime US3848392A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP47103650A JPS4963266A (xx) 1972-10-18 1972-10-18
JP48071119A JPS5221826B2 (xx) 1973-06-23 1973-06-23

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US3848392A true US3848392A (en) 1974-11-19

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US40639573 Expired - Lifetime US3848392A (en) 1972-10-18 1973-10-15 Method for disposal of industrial wastes

Country Status (7)

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US (1) US3848392A (xx)
CA (1) CA1018743A (xx)
DE (1) DE2342901B2 (xx)
FR (1) FR2203753B1 (xx)
GB (1) GB1412821A (xx)
IT (1) IT999561B (xx)
NL (1) NL7314116A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2073356A2 (es) * 1993-07-15 1995-08-01 Antonio Casado Y Cia S A Procedimiento para el aprovechamiento integral de residuos mediante aglomeracion.
WO1998053928A1 (en) * 1997-05-29 1998-12-03 Josoha Mesinger A method for producing a concrete container for permanent waste storage and meta-structures constructed therein
US20040115374A1 (en) * 2002-12-17 2004-06-17 Lin Kang Chin Method and apparatus for treating waste materials
CN107263732A (zh) * 2017-07-25 2017-10-20 仁怀市攀峰石材加工厂 一种石材加工过程中含渣废水的回收再利用方法

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166709A (en) * 1978-08-03 1979-09-04 Stabatrol Corporation Method for vaulting hazardous chemical waste materials
GB2120230A (en) * 1982-05-13 1983-11-30 Esso Textile Waste matter processing
EP0107269A3 (en) * 1982-08-28 1985-01-09 W.B. Black & Sons (Holdings) Limited Asbestos disposal
AT385215B (de) * 1983-04-28 1988-03-10 Huebl Friedrich Ing Verfahren zur deponierung von sonderabfaellen
DE3525111A1 (de) * 1985-07-13 1987-01-15 Hubert Eirich Verfahren zur herstellung auslaugfester agglomerate
DE3603080A1 (de) * 1986-02-01 1987-08-06 Peter Molitor Verfahren zur herstellung deponierfaehiger produkte unter verwendung von schad- und/oder abfallstoffen
DE3643345A1 (de) * 1986-12-18 1988-06-23 Hoelter Gmbh Verfahren zur stabilisierung von schadstoffbelasteten schlaemmen
NL8902106A (nl) * 1989-08-21 1991-03-18 Pelt & Hooykaas Werkwijze en installatie voor het verwerken van in een stortruimte op te slaan milieuschadelijk afval in de vorm van blokken.
DE4209577A1 (de) * 1992-03-25 1993-05-27 Matthias Greb Verfahren und vorrichtung zur entsorgung von gefahrstoffen und zur herstellung von gefahrstoffe enthaltenden formkoerpern
AU6672594A (en) * 1993-10-05 1995-05-01 Roger Pincket Method and jacket for encapsulation of waste
EP0666121A1 (en) * 1994-02-04 1995-08-09 Enea Ente Per Le Nuove Tecnologie, L'energia E L'ambiente Method and apparatus for making asbestos-containing waste inert
CN112405820B (zh) * 2020-11-18 2021-12-21 南京五环新型材料科技有限公司 一种特种轻质混凝土生产装置及工艺

Citations (2)

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Publication number Priority date Publication date Assignee Title
US3654048A (en) * 1970-04-13 1972-04-04 Sun Oil Co Compact bale comprising 1-15 parts by weight bitumen and 85-99 parts by weight of shredded municipal refuge
US3721183A (en) * 1971-11-08 1973-03-20 J Dunlea Method of disposing bulk rubbish

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1246848A (fr) * 1959-10-13 1960-11-25 Commissariat Energie Atomique Procédé d'élimination de déchets radioactifs et produits obtenus suivant ce procédé
DE1274051B (de) * 1964-12-23 1968-08-01 John V Dunlea Jun Verfahren zur Auslagerung von Muell durch Verpressen des losen Muells zu Paketen undderen Versenken im Meer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654048A (en) * 1970-04-13 1972-04-04 Sun Oil Co Compact bale comprising 1-15 parts by weight bitumen and 85-99 parts by weight of shredded municipal refuge
US3721183A (en) * 1971-11-08 1973-03-20 J Dunlea Method of disposing bulk rubbish

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2073356A2 (es) * 1993-07-15 1995-08-01 Antonio Casado Y Cia S A Procedimiento para el aprovechamiento integral de residuos mediante aglomeracion.
WO1998053928A1 (en) * 1997-05-29 1998-12-03 Josoha Mesinger A method for producing a concrete container for permanent waste storage and meta-structures constructed therein
US20040115374A1 (en) * 2002-12-17 2004-06-17 Lin Kang Chin Method and apparatus for treating waste materials
US20050008791A1 (en) * 2002-12-17 2005-01-13 Lin Kang Chin Waste block
US6923929B2 (en) * 2002-12-17 2005-08-02 Kang Chin Lin Method and apparatus for treating waste materials
CN107263732A (zh) * 2017-07-25 2017-10-20 仁怀市攀峰石材加工厂 一种石材加工过程中含渣废水的回收再利用方法

Also Published As

Publication number Publication date
DE2342901B2 (de) 1976-02-26
FR2203753A1 (xx) 1974-05-17
GB1412821A (en) 1975-11-05
IT999561B (it) 1976-03-10
AU5934473A (en) 1975-02-20
FR2203753B1 (xx) 1977-05-13
CA1018743A (en) 1977-10-11
NL7314116A (xx) 1974-04-22
DE2342901A1 (de) 1974-05-02

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